diff --git a/build_msvc/bitcoin_config.h b/build_msvc/bitcoin_config.h
index b5a05e262..6944b14c7 100644
--- a/build_msvc/bitcoin_config.h
+++ b/build_msvc/bitcoin_config.h
@@ -23,10 +23,10 @@
 #define COPYRIGHT_HOLDERS "The %s developers"
 
 /* Copyright holder(s) */
-#define COPYRIGHT_HOLDERS_FINAL "The Bitcoin Core developers"
+#define COPYRIGHT_HOLDERS_FINAL "The QuasarAppcoin Core developers"
 
 /* Replacement for %s in copyright holders string */
-#define COPYRIGHT_HOLDERS_SUBSTITUTION "Bitcoin Core"
+#define COPYRIGHT_HOLDERS_SUBSTITUTION "QuasarAppcoin Core"
 
 /* Copyright year */
 #define COPYRIGHT_YEAR 2019
@@ -340,19 +340,19 @@
 #define LT_OBJDIR ".libs/"
 
 /* Define to the address where bug reports for this package should be sent. */
-#define PACKAGE_BUGREPORT "https://github.com/bitcoin/bitcoin/issues"
+#define PACKAGE_BUGREPORT "https://github.com/QuasarApp/QuasarAppCoin/issues"
 
 /* Define to the full name of this package. */
-#define PACKAGE_NAME "Bitcoin Core"
+#define PACKAGE_NAME "QuasarAppcoin Core"
 
 /* Define to the full name and version of this package. */
-#define PACKAGE_STRING "Bitcoin Core 0.17.99"
+#define PACKAGE_STRING "QuasarAppcoin Core 0.17.99"
 
 /* Define to the one symbol short name of this package. */
-#define PACKAGE_TARNAME "bitcoin"
+#define PACKAGE_TARNAME "quasarappcoin"
 
 /* Define to the home page for this package. */
-#define PACKAGE_URL "https://bitcoincore.org/"
+#define PACKAGE_URL "https://github.com/QuasarApp"
 
 /* Define to the version of this package. */
 #define PACKAGE_VERSION "0.17.99"
diff --git a/build_msvc/testconsensus/testconsensus.cpp b/build_msvc/testconsensus/testconsensus.cpp
index 0068f588c..01a7dc478 100644
--- a/build_msvc/testconsensus/testconsensus.cpp
+++ b/build_msvc/testconsensus/testconsensus.cpp
@@ -1,6 +1,6 @@
 #include <iostream>
 
-// bitcoin includes.
+// quasarappcoin includes.
 #include <..\src\script\bitcoinconsensus.h>
 #include <..\src\primitives\transaction.h>
 #include <..\src\script\script.h>
diff --git a/src/addrdb.cpp b/src/addrdb.cpp
index c6083f555..26d8a1da6 100644
--- a/src/addrdb.cpp
+++ b/src/addrdb.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/addrdb.h b/src/addrdb.h
index 290b63dd1..00f9ab56e 100644
--- a/src/addrdb.h
+++ b/src/addrdb.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/addrman.cpp b/src/addrman.cpp
index 8a5f78d1c..3a7175d0d 100644
--- a/src/addrman.cpp
+++ b/src/addrman.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2012 Pieter Wuille
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/addrman.h b/src/addrman.h
index e54184ce3..8c5a490d0 100644
--- a/src/addrman.h
+++ b/src/addrman.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2012 Pieter Wuille
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/amount.h b/src/amount.h
index 47968e80b..8984fca39 100644
--- a/src/amount.h
+++ b/src/amount.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -15,7 +15,7 @@ static const CAmount COIN = 100000000;
 
 /** No amount larger than this (in satoshi) is valid.
  *
- * Note that this constant is *not* the total money supply, which in Bitcoin
+ * Note that this constant is *not* the total money supply, which in QuasarAppcoin
  * currently happens to be less than 21,000,000 BTC for various reasons, but
  * rather a sanity check. As this sanity check is used by consensus-critical
  * validation code, the exact value of the MAX_MONEY constant is consensus
diff --git a/src/arith_uint256.cpp b/src/arith_uint256.cpp
index aa66d1310..7983b0c23 100644
--- a/src/arith_uint256.cpp
+++ b/src/arith_uint256.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/arith_uint256.h b/src/arith_uint256.h
index bd0360087..a6ebc7829 100644
--- a/src/arith_uint256.h
+++ b/src/arith_uint256.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -271,7 +271,7 @@ public:
      * Thus 0x1234560000 is compact (0x05123456)
      * and  0xc0de000000 is compact (0x0600c0de)
      *
-     * Bitcoin only uses this "compact" format for encoding difficulty
+     * QuasarAppcoin only uses this "compact" format for encoding difficulty
      * targets, which are unsigned 256bit quantities.  Thus, all the
      * complexities of the sign bit and using base 256 are probably an
      * implementation accident.
diff --git a/src/attributes.h b/src/attributes.h
index 45099bd8b..fb3ae3247 100644
--- a/src/attributes.h
+++ b/src/attributes.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/banman.cpp b/src/banman.cpp
index 47d64a8f3..3d215fc48 100644
--- a/src/banman.cpp
+++ b/src/banman.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2017 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/banman.h b/src/banman.h
index a1a00309d..bb94ddf9b 100644
--- a/src/banman.h
+++ b/src/banman.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2017 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #ifndef BITCOIN_BANMAN_H
diff --git a/src/base58.cpp b/src/base58.cpp
index e3d285339..30eae90af 100644
--- a/src/base58.cpp
+++ b/src/base58.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/base58.h b/src/base58.h
index d6e0299a1..e51cbb173 100644
--- a/src/base58.h
+++ b/src/base58.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/base58.cpp b/src/bench/base58.cpp
index e7702ec46..1d75ea6e6 100644
--- a/src/bench/base58.cpp
+++ b/src/bench/base58.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/bech32.cpp b/src/bench/bech32.cpp
index 3c4b453a2..7f31de093 100644
--- a/src/bench/bech32.cpp
+++ b/src/bench/bech32.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/bench.cpp b/src/bench/bench.cpp
index b08ecbb62..e76858083 100644
--- a/src/bench/bench.cpp
+++ b/src/bench/bench.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2019 The Bitcoin Core developers
+// Copyright (c) 2015-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/bench.h b/src/bench/bench.h
index 35eeab339..4e563032b 100644
--- a/src/bench/bench.h
+++ b/src/bench/bench.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/bench_bitcoin.cpp b/src/bench/bench_bitcoin.cpp
index 3cf0bf953..be2046cc4 100644
--- a/src/bench/bench_bitcoin.cpp
+++ b/src/bench/bench_bitcoin.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2019 The Bitcoin Core developers
+// Copyright (c) 2015-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/block_assemble.cpp b/src/bench/block_assemble.cpp
index fb33c09ab..81367335b 100644
--- a/src/bench/block_assemble.cpp
+++ b/src/bench/block_assemble.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/ccoins_caching.cpp b/src/bench/ccoins_caching.cpp
index 9cfd5d23e..2341ab00a 100644
--- a/src/bench/ccoins_caching.cpp
+++ b/src/bench/ccoins_caching.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -52,7 +52,7 @@ SetupDummyInputs(CBasicKeyStore& keystoreRet, CCoinsViewCache& coinsRet)
 // many times micro-benchmarks of the database showed completely different
 // characteristics than e.g. reindex timings. But that's not a requirement of
 // every benchmark."
-// (https://github.com/bitcoin/bitcoin/issues/7883#issuecomment-224807484)
+// (https://github.com/quasarappcoin/quasarappcoin/issues/7883#issuecomment-224807484)
 static void CCoinsCaching(benchmark::State& state)
 {
     CBasicKeyStore keystore;
diff --git a/src/bench/checkblock.cpp b/src/bench/checkblock.cpp
index e325333c0..2e70be53b 100644
--- a/src/bench/checkblock.cpp
+++ b/src/bench/checkblock.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/checkqueue.cpp b/src/bench/checkqueue.cpp
index 6ab542067..73ff5c1b2 100644
--- a/src/bench/checkqueue.cpp
+++ b/src/bench/checkqueue.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/coin_selection.cpp b/src/bench/coin_selection.cpp
index f2ab03e20..4ef5de6fd 100644
--- a/src/bench/coin_selection.cpp
+++ b/src/bench/coin_selection.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -25,7 +25,7 @@ static void addCoin(const CAmount& nValue, const CWallet& wallet, std::vector<st
 // the hardest, as you need a wider selection of scenarios, just testing the
 // same one over and over isn't too useful. Generating random isn't useful
 // either for measurements."
-// (https://github.com/bitcoin/bitcoin/issues/7883#issuecomment-224807484)
+// (https://github.com/quasarappcoin/quasarappcoin/issues/7883#issuecomment-224807484)
 static void CoinSelection(benchmark::State& state)
 {
     auto chain = interfaces::MakeChain();
diff --git a/src/bench/crypto_hash.cpp b/src/bench/crypto_hash.cpp
index dc0b05442..88cb76123 100644
--- a/src/bench/crypto_hash.cpp
+++ b/src/bench/crypto_hash.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/duplicate_inputs.cpp b/src/bench/duplicate_inputs.cpp
index 2d7a35152..c659cab97 100644
--- a/src/bench/duplicate_inputs.cpp
+++ b/src/bench/duplicate_inputs.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/examples.cpp b/src/bench/examples.cpp
index e7ddd5a93..4e1d7ab55 100644
--- a/src/bench/examples.cpp
+++ b/src/bench/examples.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/gcs_filter.cpp b/src/bench/gcs_filter.cpp
index 535ad3557..3a0b19b46 100644
--- a/src/bench/gcs_filter.cpp
+++ b/src/bench/gcs_filter.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/lockedpool.cpp b/src/bench/lockedpool.cpp
index 0712eab4b..c6a43aebc 100644
--- a/src/bench/lockedpool.cpp
+++ b/src/bench/lockedpool.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/mempool_eviction.cpp b/src/bench/mempool_eviction.cpp
index ac8a18235..87ab64c06 100644
--- a/src/bench/mempool_eviction.cpp
+++ b/src/bench/mempool_eviction.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/merkle_root.cpp b/src/bench/merkle_root.cpp
index bdb2bdbe3..3e7d557e2 100644
--- a/src/bench/merkle_root.cpp
+++ b/src/bench/merkle_root.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/poly1305.cpp b/src/bench/poly1305.cpp
index 16342d0fb..33163ad59 100644
--- a/src/bench/poly1305.cpp
+++ b/src/bench/poly1305.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/prevector.cpp b/src/bench/prevector.cpp
index 00e5d7e7a..b2ae5d214 100644
--- a/src/bench/prevector.cpp
+++ b/src/bench/prevector.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/rollingbloom.cpp b/src/bench/rollingbloom.cpp
index 0a99ea318..2a97814af 100644
--- a/src/bench/rollingbloom.cpp
+++ b/src/bench/rollingbloom.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/rpc_mempool.cpp b/src/bench/rpc_mempool.cpp
index 67d8a2556..e7a3dd8fa 100644
--- a/src/bench/rpc_mempool.cpp
+++ b/src/bench/rpc_mempool.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/verify_script.cpp b/src/bench/verify_script.cpp
index 312b66e38..af1f74e54 100644
--- a/src/bench/verify_script.cpp
+++ b/src/bench/verify_script.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bench/wallet_balance.cpp b/src/bench/wallet_balance.cpp
index 46ca12826..b1f9c9a51 100644
--- a/src/bench/wallet_balance.cpp
+++ b/src/bench/wallet_balance.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
index 1009a771f..728ae9d71 100644
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -108,10 +108,10 @@ static int AppInitRPC(int argc, char* argv[])
         std::string strUsage = PACKAGE_NAME " RPC client version " + FormatFullVersion() + "\n";
         if (!gArgs.IsArgSet("-version")) {
             strUsage += "\n"
-                "Usage:  bitcoin-cli [options] <command> [params]  Send command to " PACKAGE_NAME "\n"
-                "or:     bitcoin-cli [options] -named <command> [name=value]...  Send command to " PACKAGE_NAME " (with named arguments)\n"
-                "or:     bitcoin-cli [options] help                List commands\n"
-                "or:     bitcoin-cli [options] help <command>      Get help for a command\n";
+                "Usage:  quasarappcoin-cli [options] <command> [params]  Send command to " PACKAGE_NAME "\n"
+                "or:     quasarappcoin-cli [options] -named <command> [name=value]...  Send command to " PACKAGE_NAME " (with named arguments)\n"
+                "or:     quasarappcoin-cli [options] help                List commands\n"
+                "or:     quasarappcoin-cli [options] help <command>      Get help for a command\n";
             strUsage += "\n" + gArgs.GetHelpMessage();
         }
 
@@ -462,7 +462,7 @@ static int CommandLineRPC(int argc, char *argv[])
                             strPrint += "error message:\n"+errMsg.get_str();
 
                         if (errCode.isNum() && errCode.get_int() == RPC_WALLET_NOT_SPECIFIED) {
-                            strPrint += "\nTry adding \"-rpcwallet=<filename>\" option to bitcoin-cli command line.";
+                            strPrint += "\nTry adding \"-rpcwallet=<filename>\" option to quasarappcoin-cli command line.";
                         }
                     }
                 } else {
diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index 7f41ea7ae..4958b199b 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -98,9 +98,9 @@ static int AppInitRawTx(int argc, char* argv[])
 
     if (argc < 2 || HelpRequested(gArgs)) {
         // First part of help message is specific to this utility
-        std::string strUsage = PACKAGE_NAME " bitcoin-tx utility version " + FormatFullVersion() + "\n\n" +
-            "Usage:  bitcoin-tx [options] <hex-tx> [commands]  Update hex-encoded bitcoin transaction\n" +
-            "or:     bitcoin-tx [options] -create [commands]   Create hex-encoded bitcoin transaction\n" +
+        std::string strUsage = PACKAGE_NAME " quasarappcoin-tx utility version " + FormatFullVersion() + "\n\n" +
+            "Usage:  quasarappcoin-tx [options] <hex-tx> [commands]  Update hex-encoded quasarappcoin transaction\n" +
+            "or:     quasarappcoin-tx [options] -create [commands]   Create hex-encoded quasarappcoin transaction\n" +
             "\n";
         strUsage += gArgs.GetHelpMessage();
 
@@ -790,7 +790,7 @@ static int CommandLineRawTx(int argc, char* argv[])
             if (argc < 2)
                 throw std::runtime_error("too few parameters");
 
-            // param: hex-encoded bitcoin transaction
+            // param: hex-encoded quasarappcoin transaction
             std::string strHexTx(argv[1]);
             if (strHexTx == "-")                 // "-" implies standard input
                 strHexTx = readStdin();
diff --git a/src/bitcoin-wallet.cpp b/src/bitcoin-wallet.cpp
index 32a539aac..63717eed4 100644
--- a/src/bitcoin-wallet.cpp
+++ b/src/bitcoin-wallet.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -41,12 +41,12 @@ static bool WalletAppInit(int argc, char* argv[])
         return false;
     }
     if (argc < 2 || HelpRequested(gArgs)) {
-        std::string usage = strprintf("%s bitcoin-wallet version", PACKAGE_NAME) + " " + FormatFullVersion() + "\n\n" +
-                                      "wallet-tool is an offline tool for creating and interacting with Bitcoin Core wallet files.\n" +
+        std::string usage = strprintf("%s quasarappcoin-wallet version", PACKAGE_NAME) + " " + FormatFullVersion() + "\n\n" +
+                                      "wallet-tool is an offline tool for creating and interacting with QuasarAppcoin Core wallet files.\n" +
                                       "By default wallet-tool will act on wallets in the default mainnet wallet directory in the datadir.\n" +
                                       "To change the target wallet, use the -datadir, -wallet and -testnet/-regtest arguments.\n\n" +
                                       "Usage:\n" +
-                                     "  bitcoin-wallet [options] <command>\n\n" +
+                                     "  quasarappcoin-wallet [options] <command>\n\n" +
                                      gArgs.GetHelpMessage();
 
         fprintf(stdout, "%s", usage.c_str());
@@ -96,7 +96,7 @@ int main(int argc, char* argv[])
     }
 
     if (method.empty()) {
-        fprintf(stderr, "No method provided. Run `bitcoin-wallet -help` for valid methods.\n");
+        fprintf(stderr, "No method provided. Run `quasarappcoin-wallet -help` for valid methods.\n");
         return EXIT_FAILURE;
     }
 
diff --git a/src/bitcoind.cpp b/src/bitcoind.cpp
index b31f86cdd..5c612903e 100644
--- a/src/bitcoind.cpp
+++ b/src/bitcoind.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -33,13 +33,13 @@ const std::function<std::string(const char*)> G_TRANSLATION_FUN = nullptr;
  *
  * \section intro_sec Introduction
  *
- * This is the developer documentation of the reference client for an experimental new digital currency called Bitcoin,
- * which enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate
+ * This is the developer documentation of the reference client for an experimental new digital currency called QuasarAppcoin,
+ * which enables instant payments to anyone, anywhere in the world. QuasarAppcoin uses peer-to-peer technology to operate
  * with no central authority: managing transactions and issuing money are carried out collectively by the network.
  *
  * The software is a community-driven open source project, released under the MIT license.
  *
- * See https://github.com/bitcoin/bitcoin and https://bitcoincore.org/ for further information about the project.
+ * See https://github.com/quasarappcoin/quasarappcoin and https://bitcoincore.org/ for further information about the project.
  *
  * \section Navigation
  * Use the buttons <code>Namespaces</code>, <code>Classes</code> or <code>Files</code> at the top of the page to start navigating the code.
@@ -70,7 +70,7 @@ static bool AppInit(int argc, char* argv[])
     //
     // Parameters
     //
-    // If Qt is used, parameters/bitcoin.conf are parsed in qt/bitcoin.cpp's main()
+    // If Qt is used, parameters/quasarappcoin.conf are parsed in qt/quasarappcoin.cpp's main()
     SetupServerArgs();
     std::string error;
     if (!gArgs.ParseParameters(argc, argv, error)) {
@@ -150,7 +150,7 @@ static bool AppInit(int argc, char* argv[])
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 #endif
-            fprintf(stdout, "Bitcoin server starting\n");
+            fprintf(stdout, "QuasarAppcoin server starting\n");
 
             // Daemonize
             if (daemon(1, 0)) { // don't chdir (1), do close FDs (0)
diff --git a/src/blockencodings.cpp b/src/blockencodings.cpp
index 10f51931f..09c556d5b 100644
--- a/src/blockencodings.cpp
+++ b/src/blockencodings.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/blockencodings.h b/src/blockencodings.h
index 0c2b83ebc..aa79067d5 100644
--- a/src/blockencodings.h
+++ b/src/blockencodings.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/blockfilter.cpp b/src/blockfilter.cpp
index 787390be3..4b4adf166 100644
--- a/src/blockfilter.cpp
+++ b/src/blockfilter.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/blockfilter.h b/src/blockfilter.h
index 914b94fec..ba37a166e 100644
--- a/src/blockfilter.h
+++ b/src/blockfilter.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bloom.cpp b/src/bloom.cpp
index 7732cee27..c2fb667c7 100644
--- a/src/bloom.cpp
+++ b/src/bloom.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/bloom.h b/src/bloom.h
index 7d3aa878b..47c125545 100644
--- a/src/bloom.h
+++ b/src/bloom.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/chain.cpp b/src/chain.cpp
index 5520d8149..ab8cbd741 100644
--- a/src/chain.cpp
+++ b/src/chain.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/chain.h b/src/chain.h
index dd9cc2a59..c2dd6d10b 100644
--- a/src/chain.h
+++ b/src/chain.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -33,7 +33,7 @@ static constexpr int64_t TIMESTAMP_WINDOW = MAX_FUTURE_BLOCK_TIME;
  * Maximum gap between node time and block time used
  * for the "Catching up..." mode in GUI.
  *
- * Ref: https://github.com/bitcoin/bitcoin/pull/1026
+ * Ref: https://github.com/quasarappcoin/quasarappcoin/pull/1026
  */
 static constexpr int64_t MAX_BLOCK_TIME_GAP = 90 * 60;
 
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index b8e0ea23d..71a38e174 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -120,13 +120,13 @@ public:
         // This is fine at runtime as we'll fall back to using them as a oneshot if they don't support the
         // service bits we want, but we should get them updated to support all service bits wanted by any
         // release ASAP to avoid it where possible.
-        vSeeds.emplace_back("seed.bitcoin.sipa.be"); // Pieter Wuille, only supports x1, x5, x9, and xd
+        vSeeds.emplace_back("seed.quasarappcoin.sipa.be"); // Pieter Wuille, only supports x1, x5, x9, and xd
         vSeeds.emplace_back("dnsseed.bluematt.me"); // Matt Corallo, only supports x9
-        vSeeds.emplace_back("dnsseed.bitcoin.dashjr.org"); // Luke Dashjr
+        vSeeds.emplace_back("dnsseed.quasarappcoin.dashjr.org"); // Luke Dashjr
         vSeeds.emplace_back("seed.bitcoinstats.com"); // Christian Decker, supports x1 - xf
-        vSeeds.emplace_back("seed.bitcoin.jonasschnelli.ch"); // Jonas Schnelli, only supports x1, x5, x9, and xd
+        vSeeds.emplace_back("seed.quasarappcoin.jonasschnelli.ch"); // Jonas Schnelli, only supports x1, x5, x9, and xd
         vSeeds.emplace_back("seed.btc.petertodd.org"); // Peter Todd, only supports x1, x5, x9, and xd
-        vSeeds.emplace_back("seed.bitcoin.sprovoost.nl"); // Sjors Provoost
+        vSeeds.emplace_back("seed.quasarappcoin.sprovoost.nl"); // Sjors Provoost
         vSeeds.emplace_back("dnsseed.emzy.de"); // Stephan Oeste
 
         base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0);
@@ -230,9 +230,9 @@ public:
         vFixedSeeds.clear();
         vSeeds.clear();
         // nodes with support for servicebits filtering should be at the top
-        vSeeds.emplace_back("testnet-seed.bitcoin.jonasschnelli.ch");
+        vSeeds.emplace_back("testnet-seed.quasarappcoin.jonasschnelli.ch");
         vSeeds.emplace_back("seed.tbtc.petertodd.org");
-        vSeeds.emplace_back("seed.testnet.bitcoin.sprovoost.nl");
+        vSeeds.emplace_back("seed.testnet.quasarappcoin.sprovoost.nl");
         vSeeds.emplace_back("testnet-seed.bluematt.me"); // Just a static list of stable node(s), only supports x9
 
         base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
diff --git a/src/chainparams.h b/src/chainparams.h
index 6ff3dbb7e..ebaffdd9d 100644
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -39,7 +39,7 @@ struct ChainTxData {
 
 /**
  * CChainParams defines various tweakable parameters of a given instance of the
- * Bitcoin system. There are three: the main network on which people trade goods
+ * QuasarAppcoin system. There are three: the main network on which people trade goods
  * and services, the public test network which gets reset from time to time and
  * a regression test mode which is intended for private networks only. It has
  * minimal difficulty to ensure that blocks can be found instantly.
diff --git a/src/chainparamsbase.cpp b/src/chainparamsbase.cpp
index f0559a319..5c3014003 100644
--- a/src/chainparamsbase.cpp
+++ b/src/chainparamsbase.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/chainparamsbase.h b/src/chainparamsbase.h
index 355df043d..a841e0489 100644
--- a/src/chainparamsbase.h
+++ b/src/chainparamsbase.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -10,8 +10,8 @@
 #include <vector>
 
 /**
- * CBaseChainParams defines the base parameters (shared between bitcoin-cli and bitcoind)
- * of a given instance of the Bitcoin system.
+ * CBaseChainParams defines the base parameters (shared between quasarappcoin-cli and bitcoind)
+ * of a given instance of the QuasarAppcoin system.
  */
 class CBaseChainParams
 {
diff --git a/src/chainparamsseeds.h b/src/chainparamsseeds.h
index 4b982a471..b6cbd5101 100644
--- a/src/chainparamsseeds.h
+++ b/src/chainparamsseeds.h
@@ -1,7 +1,7 @@
 #ifndef BITCOIN_CHAINPARAMSSEEDS_H
 #define BITCOIN_CHAINPARAMSSEEDS_H
 /**
- * List of fixed seed nodes for the bitcoin network
+ * List of fixed seed nodes for the quasarappcoin network
  * AUTOGENERATED by contrib/seeds/generate-seeds.py
  *
  * Each line contains a 16-byte IPv6 address and a port.
diff --git a/src/checkqueue.h b/src/checkqueue.h
index 978e23a7c..f6522591b 100644
--- a/src/checkqueue.h
+++ b/src/checkqueue.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/clientversion.cpp b/src/clientversion.cpp
index 5d9eaea6d..a18d76d39 100644
--- a/src/clientversion.cpp
+++ b/src/clientversion.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -9,7 +9,7 @@
 
 /**
  * Name of client reported in the 'version' message. Report the same name
- * for both bitcoind and bitcoin-qt, to make it harder for attackers to
+ * for both bitcoind and quasarappcoin-qt, to make it harder for attackers to
  * target servers or GUI users specifically.
  */
 const std::string CLIENT_NAME("Satoshi");
@@ -82,7 +82,7 @@ std::string FormatFullVersion()
 }
 
 /**
- * Format the subversion field according to BIP 14 spec (https://github.com/bitcoin/bips/blob/master/bip-0014.mediawiki)
+ * Format the subversion field according to BIP 14 spec (https://github.com/quasarappcoin/bips/blob/master/bip-0014.mediawiki)
  */
 std::string FormatSubVersion(const std::string& name, int nClientVersion, const std::vector<std::string>& comments)
 {
diff --git a/src/clientversion.h b/src/clientversion.h
index 363094b69..d177966c3 100644
--- a/src/clientversion.h
+++ b/src/clientversion.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/coins.cpp b/src/coins.cpp
index 3ef9e0463..77fad62a7 100644
--- a/src/coins.cpp
+++ b/src/coins.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/coins.h b/src/coins.h
index 482e233e8..bce6dbb73 100644
--- a/src/coins.h
+++ b/src/coins.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/compat.h b/src/compat.h
index 68f6eb692..c55022fa3 100644
--- a/src/compat.h
+++ b/src/compat.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -90,7 +90,7 @@ typedef char* sockopt_arg_type;
 
 // Note these both should work with the current usage of poll, but best to be safe
 // WIN32 poll is broken https://daniel.haxx.se/blog/2012/10/10/wsapoll-is-broken/
-// __APPLE__ poll is broke https://github.com/bitcoin/bitcoin/pull/14336#issuecomment-437384408
+// __APPLE__ poll is broke https://github.com/quasarappcoin/quasarappcoin/pull/14336#issuecomment-437384408
 #if defined(__linux__)
 #define USE_POLL
 #endif
diff --git a/src/compat/assumptions.h b/src/compat/assumptions.h
index 6e7b4d3de..31cefd1d6 100644
--- a/src/compat/assumptions.h
+++ b/src/compat/assumptions.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -14,7 +14,7 @@
 // Example(s): We use assert(...) extensively with the assumption of it never
 //             being a noop at runtime.
 #if defined(NDEBUG)
-# error "Bitcoin cannot be compiled without assertions."
+# error "QuasarAppcoin cannot be compiled without assertions."
 #endif
 
 // Assumption: We assume a C++11 (ISO/IEC 14882:2011) compiler (minimum requirement).
diff --git a/src/compat/byteswap.h b/src/compat/byteswap.h
index fe47f4899..28841dc5d 100644
--- a/src/compat/byteswap.h
+++ b/src/compat/byteswap.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/compat/endian.h b/src/compat/endian.h
index c5cf7a46c..ea9aa867e 100644
--- a/src/compat/endian.h
+++ b/src/compat/endian.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/compat/glibc_compat.cpp b/src/compat/glibc_compat.cpp
index 4de4fd7f4..e091b63e5 100644
--- a/src/compat/glibc_compat.cpp
+++ b/src/compat/glibc_compat.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/compat/glibc_sanity.cpp b/src/compat/glibc_sanity.cpp
index 1ef66e27b..9f3e30bd8 100644
--- a/src/compat/glibc_sanity.cpp
+++ b/src/compat/glibc_sanity.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/compat/glibcxx_sanity.cpp b/src/compat/glibcxx_sanity.cpp
index e6e6208e4..aa60a1bc0 100644
--- a/src/compat/glibcxx_sanity.cpp
+++ b/src/compat/glibcxx_sanity.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/compat/sanity.h b/src/compat/sanity.h
index 909c4f6da..89738db69 100644
--- a/src/compat/sanity.h
+++ b/src/compat/sanity.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2014 The Bitcoin Core developers
+// Copyright (c) 2009-2014 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/compat/strnlen.cpp b/src/compat/strnlen.cpp
index 93a034a66..71b424f90 100644
--- a/src/compat/strnlen.cpp
+++ b/src/compat/strnlen.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/compressor.cpp b/src/compressor.cpp
index a2d9af880..af3a84e91 100644
--- a/src/compressor.cpp
+++ b/src/compressor.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/compressor.h b/src/compressor.h
index c1eda503c..a5a9b102c 100644
--- a/src/compressor.h
+++ b/src/compressor.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/consensus/consensus.h b/src/consensus/consensus.h
index 788fa4e55..6c30ca8fb 100644
--- a/src/consensus/consensus.h
+++ b/src/consensus/consensus.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/consensus/merkle.cpp b/src/consensus/merkle.cpp
index b47d9774c..a63f8472a 100644
--- a/src/consensus/merkle.cpp
+++ b/src/consensus/merkle.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/consensus/merkle.h b/src/consensus/merkle.h
index 7675877de..f1493ec16 100644
--- a/src/consensus/merkle.h
+++ b/src/consensus/merkle.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/consensus/params.h b/src/consensus/params.h
index 6c3a201f4..3e480a4fa 100644
--- a/src/consensus/params.h
+++ b/src/consensus/params.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/consensus/tx_check.cpp b/src/consensus/tx_check.cpp
index 61a607ef7..3f8697c5a 100644
--- a/src/consensus/tx_check.cpp
+++ b/src/consensus/tx_check.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/consensus/tx_check.h b/src/consensus/tx_check.h
index bcfdf36bf..8532cd774 100644
--- a/src/consensus/tx_check.h
+++ b/src/consensus/tx_check.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -7,7 +7,7 @@
 
 /**
  * Context-independent transaction checking code that can be called outside the
- * bitcoin server and doesn't depend on chain or mempool state. Transaction
+ * quasarappcoin server and doesn't depend on chain or mempool state. Transaction
  * verification code that does call server functions or depend on server state
  * belongs in tx_verify.h/cpp instead.
  */
diff --git a/src/consensus/tx_verify.cpp b/src/consensus/tx_verify.cpp
index fbbbcfd04..af866732c 100644
--- a/src/consensus/tx_verify.cpp
+++ b/src/consensus/tx_verify.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/consensus/tx_verify.h b/src/consensus/tx_verify.h
index 3519fc555..2940c48e6 100644
--- a/src/consensus/tx_verify.h
+++ b/src/consensus/tx_verify.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/consensus/validation.h b/src/consensus/validation.h
index f2e2c3585..3fbcca163 100644
--- a/src/consensus/validation.h
+++ b/src/consensus/validation.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/core_io.h b/src/core_io.h
index 19fb7b29f..2a7679229 100644
--- a/src/core_io.h
+++ b/src/core_io.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/core_memusage.h b/src/core_memusage.h
index 6f1ace998..9924167d3 100644
--- a/src/core_memusage.h
+++ b/src/core_memusage.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/core_read.cpp b/src/core_read.cpp
index a879a375c..d83ce5cc7 100644
--- a/src/core_read.cpp
+++ b/src/core_read.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/core_write.cpp b/src/core_write.cpp
index 765a17030..9bece0c43 100644
--- a/src/core_write.cpp
+++ b/src/core_write.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/aes.cpp b/src/crypto/aes.cpp
index 2dc213343..a6d7eb4aa 100644
--- a/src/crypto/aes.cpp
+++ b/src/crypto/aes.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/aes.h b/src/crypto/aes.h
index e06c8de27..88d1fbbe2 100644
--- a/src/crypto/aes.h
+++ b/src/crypto/aes.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 //
diff --git a/src/crypto/chacha20.cpp b/src/crypto/chacha20.cpp
index ac4470f04..7bea99e4c 100644
--- a/src/crypto/chacha20.cpp
+++ b/src/crypto/chacha20.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Bitcoin Core developers
+// Copyright (c) 2017 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/chacha20.h b/src/crypto/chacha20.h
index a305977bc..c1451099a 100644
--- a/src/crypto/chacha20.h
+++ b/src/crypto/chacha20.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Bitcoin Core developers
+// Copyright (c) 2017 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/common.h b/src/crypto/common.h
index e7bb020a1..3f1425628 100644
--- a/src/crypto/common.h
+++ b/src/crypto/common.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/hmac_sha256.cpp b/src/crypto/hmac_sha256.cpp
index 0ba99ae27..9770f0dd3 100644
--- a/src/crypto/hmac_sha256.cpp
+++ b/src/crypto/hmac_sha256.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/hmac_sha256.h b/src/crypto/hmac_sha256.h
index d31fda1dd..02dbb61e7 100644
--- a/src/crypto/hmac_sha256.h
+++ b/src/crypto/hmac_sha256.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/hmac_sha512.cpp b/src/crypto/hmac_sha512.cpp
index d70aee843..842cd492d 100644
--- a/src/crypto/hmac_sha512.cpp
+++ b/src/crypto/hmac_sha512.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/hmac_sha512.h b/src/crypto/hmac_sha512.h
index 1ea9a3671..d2982cf43 100644
--- a/src/crypto/hmac_sha512.h
+++ b/src/crypto/hmac_sha512.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/poly1305.cpp b/src/crypto/poly1305.cpp
index 8a86c9601..52bc69438 100644
--- a/src/crypto/poly1305.cpp
+++ b/src/crypto/poly1305.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/poly1305.h b/src/crypto/poly1305.h
index 1598b013b..b2346d28b 100644
--- a/src/crypto/poly1305.h
+++ b/src/crypto/poly1305.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/ripemd160.cpp b/src/crypto/ripemd160.cpp
index a00331dcb..b90bea994 100644
--- a/src/crypto/ripemd160.cpp
+++ b/src/crypto/ripemd160.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/ripemd160.h b/src/crypto/ripemd160.h
index 38ea375c1..bd21ae92a 100644
--- a/src/crypto/ripemd160.h
+++ b/src/crypto/ripemd160.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2016 The Bitcoin Core developers
+// Copyright (c) 2014-2016 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/sha1.cpp b/src/crypto/sha1.cpp
index 5c601c54a..b2bee9b63 100644
--- a/src/crypto/sha1.cpp
+++ b/src/crypto/sha1.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/sha1.h b/src/crypto/sha1.h
index 8b4568ee1..bc9746792 100644
--- a/src/crypto/sha1.h
+++ b/src/crypto/sha1.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2016 The Bitcoin Core developers
+// Copyright (c) 2014-2016 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/sha256.cpp b/src/crypto/sha256.cpp
index cab37e032..9daac485d 100644
--- a/src/crypto/sha256.cpp
+++ b/src/crypto/sha256.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/sha256.h b/src/crypto/sha256.h
index 028ee1434..c29727571 100644
--- a/src/crypto/sha256.h
+++ b/src/crypto/sha256.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/sha256_shani.cpp b/src/crypto/sha256_shani.cpp
index e561da42c..eb12da479 100644
--- a/src/crypto/sha256_shani.cpp
+++ b/src/crypto/sha256_shani.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 //
diff --git a/src/crypto/sha256_sse4.cpp b/src/crypto/sha256_sse4.cpp
index 89f529a3a..f5e727482 100644
--- a/src/crypto/sha256_sse4.cpp
+++ b/src/crypto/sha256_sse4.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Bitcoin Core developers
+// Copyright (c) 2017 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 //
diff --git a/src/crypto/sha512.cpp b/src/crypto/sha512.cpp
index bc64135ca..19cb5e7ca 100644
--- a/src/crypto/sha512.cpp
+++ b/src/crypto/sha512.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/sha512.h b/src/crypto/sha512.h
index 4118ac1b1..085d88d0d 100644
--- a/src/crypto/sha512.h
+++ b/src/crypto/sha512.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2016 The Bitcoin Core developers
+// Copyright (c) 2014-2016 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/siphash.cpp b/src/crypto/siphash.cpp
index e81957111..a587fa46b 100644
--- a/src/crypto/siphash.cpp
+++ b/src/crypto/siphash.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/crypto/siphash.h b/src/crypto/siphash.h
index b312f913f..4b0e45e67 100644
--- a/src/crypto/siphash.h
+++ b/src/crypto/siphash.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/dbwrapper.cpp b/src/dbwrapper.cpp
index 58d8cc2c9..d1318f8b4 100644
--- a/src/dbwrapper.cpp
+++ b/src/dbwrapper.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -41,7 +41,7 @@ public:
                 if (p < limit) {
                     va_list backup_ap;
                     va_copy(backup_ap, ap);
-                    // Do not use vsnprintf elsewhere in bitcoin source code, see above.
+                    // Do not use vsnprintf elsewhere in quasarappcoin source code, see above.
                     p += vsnprintf(p, limit - p, format, backup_ap);
                     va_end(backup_ap);
                 }
diff --git a/src/dbwrapper.h b/src/dbwrapper.h
index 416f5e839..c39a80a25 100644
--- a/src/dbwrapper.h
+++ b/src/dbwrapper.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/dummywallet.cpp b/src/dummywallet.cpp
index eeec6dec2..5c24b5a52 100644
--- a/src/dummywallet.cpp
+++ b/src/dummywallet.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/flatfile.cpp b/src/flatfile.cpp
index 8a8f7b681..21e6c8166 100644
--- a/src/flatfile.cpp
+++ b/src/flatfile.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/flatfile.h b/src/flatfile.h
index 374ceff41..672d57b0b 100644
--- a/src/flatfile.h
+++ b/src/flatfile.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/fs.h b/src/fs.h
index 8af81f173..39e10d19c 100644
--- a/src/fs.h
+++ b/src/fs.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/hash.cpp b/src/hash.cpp
index 26150e5ca..fea28e03d 100644
--- a/src/hash.cpp
+++ b/src/hash.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2013-2018 The Bitcoin Core developers
+// Copyright (c) 2013-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/hash.h b/src/hash.h
index c295568a3..4ea5cd729 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -18,7 +18,7 @@
 
 typedef uint256 ChainCode;
 
-/** A hasher class for Bitcoin's 256-bit hash (double SHA-256). */
+/** A hasher class for QuasarAppcoin's 256-bit hash (double SHA-256). */
 class CHash256 {
 private:
     CSHA256 sha;
@@ -42,7 +42,7 @@ public:
     }
 };
 
-/** A hasher class for Bitcoin's 160-bit hash (SHA-256 + RIPEMD-160). */
+/** A hasher class for QuasarAppcoin's 160-bit hash (SHA-256 + RIPEMD-160). */
 class CHash160 {
 private:
     CSHA256 sha;
diff --git a/src/httprpc.cpp b/src/httprpc.cpp
index fcf760a4c..235ed9d26 100644
--- a/src/httprpc.cpp
+++ b/src/httprpc.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/httprpc.h b/src/httprpc.h
index 2230a8ca4..9f5cf7357 100644
--- a/src/httprpc.h
+++ b/src/httprpc.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/httpserver.cpp b/src/httpserver.cpp
index 63639fa3e..019fde999 100644
--- a/src/httpserver.cpp
+++ b/src/httpserver.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/httpserver.h b/src/httpserver.h
index 7943f0094..422479ad4 100644
--- a/src/httpserver.h
+++ b/src/httpserver.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/index/base.cpp b/src/index/base.cpp
index 9e48f0bd2..773be94d4 100644
--- a/src/index/base.cpp
+++ b/src/index/base.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/index/base.h b/src/index/base.h
index 31acbed0c..af754a41d 100644
--- a/src/index/base.h
+++ b/src/index/base.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/index/blockfilterindex.cpp b/src/index/blockfilterindex.cpp
index 20f33baf2..a789159a7 100644
--- a/src/index/blockfilterindex.cpp
+++ b/src/index/blockfilterindex.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/index/blockfilterindex.h b/src/index/blockfilterindex.h
index 436d52515..4e645cc9f 100644
--- a/src/index/blockfilterindex.h
+++ b/src/index/blockfilterindex.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/index/txindex.cpp b/src/index/txindex.cpp
index 7367ec7cb..1a464c1ac 100644
--- a/src/index/txindex.cpp
+++ b/src/index/txindex.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/index/txindex.h b/src/index/txindex.h
index 8202c3c95..a4cf8e42a 100644
--- a/src/index/txindex.h
+++ b/src/index/txindex.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/indirectmap.h b/src/indirectmap.h
index 76da4a6bd..7ba110fe3 100644
--- a/src/indirectmap.h
+++ b/src/indirectmap.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016 The Bitcoin Core developers
+// Copyright (c) 2016 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/init.cpp b/src/init.cpp
index 92b3c9510..22e7bb5e7 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -151,7 +151,7 @@ NODISCARD static bool CreatePidFile()
 /**
  * This is a minimally invasive approach to shutdown on LevelDB read errors from the
  * chainstate, while keeping user interface out of the common library, which is shared
- * between bitcoind, and bitcoin-qt and non-server tools.
+ * between bitcoind, and quasarappcoin-qt and non-server tools.
 */
 class CCoinsViewErrorCatcher final : public CCoinsViewBacked
 {
@@ -562,7 +562,7 @@ void SetupServerArgs()
 
 std::string LicenseInfo()
 {
-    const std::string URL_SOURCE_CODE = "<https://github.com/bitcoin/bitcoin>";
+    const std::string URL_SOURCE_CODE = "<https://github.com/quasarappcoin/quasarappcoin>";
     const std::string URL_WEBSITE = "<https://bitcoincore.org>";
 
     return CopyrightHolders(strprintf(_("Copyright (C) %i-%i"), 2009, COPYRIGHT_YEAR) + " ") + "\n" +
@@ -741,7 +741,7 @@ static void ThreadImport(std::vector<fs::path> vImportFiles)
 }
 
 /** Sanity checks
- *  Ensure that Bitcoin is running in a usable environment with all
+ *  Ensure that QuasarAppcoin is running in a usable environment with all
  *  necessary library support.
  */
 static bool InitSanityCheck()
@@ -1191,7 +1191,7 @@ bool AppInitParameterInteraction()
 
 static bool LockDataDirectory(bool probeOnly)
 {
-    // Make sure only a single Bitcoin process is using the data directory.
+    // Make sure only a single QuasarAppcoin process is using the data directory.
     fs::path datadir = GetDataDir();
     if (!DirIsWritable(datadir)) {
         return InitError(strprintf(_("Cannot write to data directory '%s'; check permissions."), datadir.string()));
@@ -1277,9 +1277,9 @@ bool AppInitMain(InitInterfaces& interfaces)
     // Warn about relative -datadir path.
     if (gArgs.IsArgSet("-datadir") && !fs::path(gArgs.GetArg("-datadir", "")).is_absolute()) {
         LogPrintf("Warning: relative datadir option '%s' specified, which will be interpreted relative to the " /* Continued */
-                  "current working directory '%s'. This is fragile, because if bitcoin is started in the future "
+                  "current working directory '%s'. This is fragile, because if quasarappcoin is started in the future "
                   "from a different location, it will be unable to locate the current data files. There could "
-                  "also be data loss if bitcoin is started while in a temporary directory.\n",
+                  "also be data loss if quasarappcoin is started while in a temporary directory.\n",
             gArgs.GetArg("-datadir", ""), fs::current_path().string());
     }
 
diff --git a/src/init.h b/src/init.h
index 1c59ca069..9aecba21a 100644
--- a/src/init.h
+++ b/src/init.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -35,7 +35,7 @@ void InitLogging();
 //!Parameter interaction: change current parameters depending on various rules
 void InitParameterInteraction();
 
-/** Initialize bitcoin core: Basic context setup.
+/** Initialize quasarappcoin core: Basic context setup.
  *  @note This can be done before daemonization. Do not call Shutdown() if this function fails.
  *  @pre Parameters should be parsed and config file should be read.
  */
@@ -53,13 +53,13 @@ bool AppInitParameterInteraction();
  */
 bool AppInitSanityChecks();
 /**
- * Lock bitcoin core data directory.
+ * Lock quasarappcoin core data directory.
  * @note This should only be done after daemonization. Do not call Shutdown() if this function fails.
  * @pre Parameters should be parsed and config file should be read, AppInitSanityChecks should have been called.
  */
 bool AppInitLockDataDirectory();
 /**
- * Bitcoin core main initialization.
+ * QuasarAppcoin core main initialization.
  * @note This should only be done after daemonization. Call Shutdown() if this function fails.
  * @pre Parameters should be parsed and config file should be read, AppInitLockDataDirectory should have been called.
  */
diff --git a/src/interfaces/chain.cpp b/src/interfaces/chain.cpp
index 617be3ca7..bc28cc8f7 100644
--- a/src/interfaces/chain.cpp
+++ b/src/interfaces/chain.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/interfaces/chain.h b/src/interfaces/chain.h
index 0b7249a5a..46ff1bff0 100644
--- a/src/interfaces/chain.h
+++ b/src/interfaces/chain.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -35,22 +35,22 @@ class Wallet;
 //! estimate fees, and submit transactions.
 //!
 //! TODO: Current chain methods are too low level, exposing too much of the
-//! internal workings of the bitcoin node, and not being very convenient to use.
+//! internal workings of the quasarappcoin node, and not being very convenient to use.
 //! Chain methods should be cleaned up and simplified over time. Examples:
 //!
 //! * The Chain::lock() method, which lets clients delay chain tip updates
 //!   should be removed when clients are able to respond to updates
 //!   asynchronously
-//!   (https://github.com/bitcoin/bitcoin/pull/10973#issuecomment-380101269).
+//!   (https://github.com/quasarappcoin/quasarappcoin/pull/10973#issuecomment-380101269).
 //!
 //! * The relayTransactions() and submitToMemoryPool() methods could be replaced
 //!   with a higher-level broadcastTransaction method
-//!   (https://github.com/bitcoin/bitcoin/pull/14978#issuecomment-459373984).
+//!   (https://github.com/quasarappcoin/quasarappcoin/pull/14978#issuecomment-459373984).
 //!
 //! * The initMessages() and loadWallet() methods which the wallet uses to send
 //!   notifications to the GUI should go away when GUI and wallet can directly
 //!   communicate with each other without going through the node
-//!   (https://github.com/bitcoin/bitcoin/pull/15288#discussion_r253321096).
+//!   (https://github.com/quasarappcoin/quasarappcoin/pull/15288#discussion_r253321096).
 //!
 //! * The handleRpc, registerRpcs, rpcEnableDeprecated methods and other RPC
 //!   methods can go away if wallets listen for HTTP requests on their own
diff --git a/src/interfaces/handler.cpp b/src/interfaces/handler.cpp
index 92601fc4e..80b289936 100644
--- a/src/interfaces/handler.cpp
+++ b/src/interfaces/handler.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/interfaces/handler.h b/src/interfaces/handler.h
index c4c674cac..a9f2fd60b 100644
--- a/src/interfaces/handler.h
+++ b/src/interfaces/handler.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/interfaces/node.cpp b/src/interfaces/node.cpp
index f3ee8fe36..a92c76c22 100644
--- a/src/interfaces/node.cpp
+++ b/src/interfaces/node.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/interfaces/node.h b/src/interfaces/node.h
index 1ccd2a31b..87ad4d032 100644
--- a/src/interfaces/node.h
+++ b/src/interfaces/node.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -32,7 +32,7 @@ namespace interfaces {
 class Handler;
 class Wallet;
 
-//! Top-level interface for a bitcoin node (bitcoind process).
+//! Top-level interface for a quasarappcoin node (bitcoind process).
 class Node
 {
 public:
diff --git a/src/interfaces/wallet.cpp b/src/interfaces/wallet.cpp
index b57299d78..9095501ed 100644
--- a/src/interfaces/wallet.cpp
+++ b/src/interfaces/wallet.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/interfaces/wallet.h b/src/interfaces/wallet.h
index 7096f5404..3896e1cd2 100644
--- a/src/interfaces/wallet.h
+++ b/src/interfaces/wallet.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/key.cpp b/src/key.cpp
index 9d982fc44..fc7f84ce2 100644
--- a/src/key.cpp
+++ b/src/key.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Copyright (c) 2017 The Zcash developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
@@ -229,7 +229,7 @@ bool CKey::VerifyPubKey(const CPubKey& pubkey) const {
         return false;
     }
     unsigned char rnd[8];
-    std::string str = "Bitcoin key verification\n";
+    std::string str = "QuasarAppcoin key verification\n";
     GetRandBytes(rnd, sizeof(rnd));
     uint256 hash;
     CHash256().Write((unsigned char*)str.data(), str.size()).Write(rnd, sizeof(rnd)).Finalize(hash.begin());
diff --git a/src/key.h b/src/key.h
index 0f695c07b..4ef06ffb3 100644
--- a/src/key.h
+++ b/src/key.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Copyright (c) 2017 The Zcash developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/key_io.cpp b/src/key_io.cpp
index 1d53a5e07..ccf1eb2d3 100644
--- a/src/key_io.cpp
+++ b/src/key_io.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -75,7 +75,7 @@ CTxDestination DecodeDestination(const std::string& str, const CChainParams& par
     std::vector<unsigned char> data;
     uint160 hash;
     if (DecodeBase58Check(str, data)) {
-        // base58-encoded Bitcoin addresses.
+        // base58-encoded QuasarAppcoin addresses.
         // Public-key-hash-addresses have version 0 (or 111 testnet).
         // The data vector contains RIPEMD160(SHA256(pubkey)), where pubkey is the serialized public key.
         const std::vector<unsigned char>& pubkey_prefix = params.Base58Prefix(CChainParams::PUBKEY_ADDRESS);
diff --git a/src/key_io.h b/src/key_io.h
index d80c08f49..d2afdfca9 100644
--- a/src/key_io.h
+++ b/src/key_io.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/keystore.cpp b/src/keystore.cpp
index 148979cf3..3493c630c 100644
--- a/src/keystore.cpp
+++ b/src/keystore.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/keystore.h b/src/keystore.h
index 4bd99e255..5c53b6d24 100644
--- a/src/keystore.h
+++ b/src/keystore.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -26,7 +26,7 @@ public:
     virtual bool HaveKey(const CKeyID &address) const =0;
     virtual std::set<CKeyID> GetKeys() const =0;
 
-    //! Support for BIP 0013 : see https://github.com/bitcoin/bips/blob/master/bip-0013.mediawiki
+    //! Support for BIP 0013 : see https://github.com/quasarappcoin/bips/blob/master/bip-0013.mediawiki
     virtual bool AddCScript(const CScript& redeemScript) =0;
     virtual bool HaveCScript(const CScriptID &hash) const =0;
     virtual std::set<CScriptID> GetCScripts() const =0;
diff --git a/src/limitedmap.h b/src/limitedmap.h
index 7d66964e3..672fbb82d 100644
--- a/src/limitedmap.h
+++ b/src/limitedmap.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/logging.cpp b/src/logging.cpp
index 3eda4995d..f62c36cd1 100644
--- a/src/logging.cpp
+++ b/src/logging.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/logging.h b/src/logging.h
index e399d4c30..a3cc2176a 100644
--- a/src/logging.h
+++ b/src/logging.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/memusage.h b/src/memusage.h
index 3ae9face1..a63f5f69b 100644
--- a/src/memusage.h
+++ b/src/memusage.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/merkleblock.cpp b/src/merkleblock.cpp
index a54268d65..b054a7ab1 100644
--- a/src/merkleblock.cpp
+++ b/src/merkleblock.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/merkleblock.h b/src/merkleblock.h
index e641c8aa9..0203d314c 100644
--- a/src/merkleblock.h
+++ b/src/merkleblock.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/miner.cpp b/src/miner.cpp
index 6a88e8321..ddd4afd1b 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/miner.h b/src/miner.h
index 7c4c45507..76a781d3c 100644
--- a/src/miner.h
+++ b/src/miner.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/net.cpp b/src/net.cpp
index 1335804b0..18f6f2c02 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -541,7 +541,7 @@ void CNode::copyStats(CNodeStats &stats)
         nPingUsecWait = GetTimeMicros() - nPingUsecStart;
     }
 
-    // Raw ping time is in microseconds, but show it to user as whole seconds (Bitcoin users should be well used to small numbers with many decimal places by now :)
+    // Raw ping time is in microseconds, but show it to user as whole seconds (QuasarAppcoin users should be well used to small numbers with many decimal places by now :)
     stats.dPingTime = (((double)nPingUsecTime) / 1e6);
     stats.dMinPing  = (((double)nMinPingUsecTime) / 1e6);
     stats.dPingWait = (((double)nPingUsecWait) / 1e6);
@@ -1443,7 +1443,7 @@ static void ThreadMapPort()
             }
         }
 
-        std::string strDesc = "Bitcoin " + FormatFullVersion();
+        std::string strDesc = "QuasarAppcoin " + FormatFullVersion();
 
         do {
 #ifndef UPNPDISCOVER_SUCCESS
diff --git a/src/net.h b/src/net.h
index 7af33ef13..5068950fe 100644
--- a/src/net.h
+++ b/src/net.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/net_processing.cpp b/src/net_processing.cpp
index 74e33189d..fbcc14dfe 100644
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -34,7 +34,7 @@
 #include <memory>
 
 #if defined(NDEBUG)
-# error "Bitcoin cannot be compiled without assertions."
+# error "QuasarAppcoin cannot be compiled without assertions."
 #endif
 
 /** Expiration time for orphan transactions in seconds */
@@ -1760,7 +1760,7 @@ void static ProcessOrphanTx(CConnman* connman, std::set<uint256>& orphan_work_se
             if (!orphanTx.HasWitness() && !stateDummy.CorruptionPossible()) {
                 // Do not use rejection cache for witness transactions or
                 // witness-stripped transactions, as they can have been malleated.
-                // See https://github.com/bitcoin/bitcoin/issues/8279 for details.
+                // See https://github.com/quasarappcoin/quasarappcoin/issues/8279 for details.
                 assert(recentRejects);
                 recentRejects->insert(orphanHash);
             }
@@ -2477,7 +2477,7 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
             if (!tx.HasWitness() && !state.CorruptionPossible()) {
                 // Do not use rejection cache for witness transactions or
                 // witness-stripped transactions, as they can have been malleated.
-                // See https://github.com/bitcoin/bitcoin/issues/8279 for details.
+                // See https://github.com/quasarappcoin/quasarappcoin/issues/8279 for details.
                 assert(recentRejects);
                 recentRejects->insert(tx.GetHash());
                 if (RecursiveDynamicUsage(*ptx) < 100000) {
diff --git a/src/net_processing.h b/src/net_processing.h
index 39c22d711..15cd3866d 100644
--- a/src/net_processing.h
+++ b/src/net_processing.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/netaddress.cpp b/src/netaddress.cpp
index 6ee2d8a4b..03f7c2af0 100644
--- a/src/netaddress.cpp
+++ b/src/netaddress.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -11,7 +11,7 @@
 static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
 static const unsigned char pchOnionCat[] = {0xFD,0x87,0xD8,0x7E,0xEB,0x43};
 
-// 0xFD + sha256("bitcoin")[0:5]
+// 0xFD + sha256("quasarappcoin")[0:5]
 static const unsigned char g_internal_prefix[] = { 0xFD, 0x6B, 0x88, 0xC0, 0x87, 0x24 };
 
 /**
@@ -47,7 +47,7 @@ void CNetAddr::SetRaw(Network network, const uint8_t *ip_in)
 
 /**
  * Try to make this a dummy address that maps the specified name into IPv6 like
- * so: (0xFD + %sha256("bitcoin")[0:5]) + %sha256(name)[0:10]. Such dummy
+ * so: (0xFD + %sha256("quasarappcoin")[0:5]) + %sha256(name)[0:10]. Such dummy
  * addresses have a prefix of fd6b:88c0:8724::/48 and are guaranteed to not be
  * publicly routable as it falls under RFC4193's fc00::/7 subnet allocated to
  * unique-local addresses.
diff --git a/src/netaddress.h b/src/netaddress.h
index 8230e4060..b4665ce39 100644
--- a/src/netaddress.h
+++ b/src/netaddress.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/netbase.cpp b/src/netbase.cpp
index 6c386a9ad..272d44fd0 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/netbase.h b/src/netbase.h
index 708df5b8e..06fcdd2a0 100644
--- a/src/netbase.h
+++ b/src/netbase.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/netmessagemaker.h b/src/netmessagemaker.h
index 2efb384a7..c41bfcbd9 100644
--- a/src/netmessagemaker.h
+++ b/src/netmessagemaker.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/node/coin.cpp b/src/node/coin.cpp
index bb98e63f3..6e5470114 100644
--- a/src/node/coin.cpp
+++ b/src/node/coin.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/node/coin.h b/src/node/coin.h
index eb95b75cf..d8dcca154 100644
--- a/src/node/coin.h
+++ b/src/node/coin.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/node/psbt.cpp b/src/node/psbt.cpp
index 12559c5a5..8fb28fd09 100644
--- a/src/node/psbt.cpp
+++ b/src/node/psbt.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/node/psbt.h b/src/node/psbt.h
index e04366a20..3a030ea7c 100644
--- a/src/node/psbt.h
+++ b/src/node/psbt.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/node/transaction.cpp b/src/node/transaction.cpp
index 5ffb15ed3..2470cad62 100644
--- a/src/node/transaction.cpp
+++ b/src/node/transaction.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/node/transaction.h b/src/node/transaction.h
index 51033f94e..1c264ba6a 100644
--- a/src/node/transaction.h
+++ b/src/node/transaction.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Copyright (c) 2017-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/noui.cpp b/src/noui.cpp
index c7d8fee0b..fc4a4506c 100644
--- a/src/noui.cpp
+++ b/src/noui.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/noui.h b/src/noui.h
index 79a79a9af..0170ac8e3 100644
--- a/src/noui.h
+++ b/src/noui.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2013-2018 The Bitcoin Core developers
+// Copyright (c) 2013-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/optional.h b/src/optional.h
index 95a3b24d0..d932cbeeb 100644
--- a/src/optional.h
+++ b/src/optional.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017 The Bitcoin Core developers
+// Copyright (c) 2017 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/outputtype.cpp b/src/outputtype.cpp
index 7e5690dfc..363620d31 100644
--- a/src/outputtype.cpp
+++ b/src/outputtype.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/outputtype.h b/src/outputtype.h
index 6c30fd195..26fd1bbe3 100644
--- a/src/outputtype.h
+++ b/src/outputtype.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/policy/feerate.cpp b/src/policy/feerate.cpp
index 14be6192f..f21254b4a 100644
--- a/src/policy/feerate.cpp
+++ b/src/policy/feerate.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/policy/feerate.h b/src/policy/feerate.h
index 85d7d22b4..e026073d0 100644
--- a/src/policy/feerate.h
+++ b/src/policy/feerate.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/policy/fees.cpp b/src/policy/fees.cpp
index 524afd014..f6175af8e 100644
--- a/src/policy/fees.cpp
+++ b/src/policy/fees.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/policy/fees.h b/src/policy/fees.h
index 6e61f7617..2de48fb5a 100644
--- a/src/policy/fees.h
+++ b/src/policy/fees.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #ifndef BITCOIN_POLICY_FEES_H
diff --git a/src/policy/policy.cpp b/src/policy/policy.cpp
index 63a3d0626..5bf982e2d 100644
--- a/src/policy/policy.cpp
+++ b/src/policy/policy.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/policy/policy.h b/src/policy/policy.h
index ebe040f0e..f2be4f73b 100644
--- a/src/policy/policy.h
+++ b/src/policy/policy.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/policy/rbf.cpp b/src/policy/rbf.cpp
index b4b8341d7..b9beebd5a 100644
--- a/src/policy/rbf.cpp
+++ b/src/policy/rbf.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/policy/rbf.h b/src/policy/rbf.h
index 0707b0044..b068e9bd1 100644
--- a/src/policy/rbf.h
+++ b/src/policy/rbf.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/policy/settings.cpp b/src/policy/settings.cpp
index e8e155940..179f4210b 100644
--- a/src/policy/settings.cpp
+++ b/src/policy/settings.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/policy/settings.h b/src/policy/settings.h
index 30a7189c9..a81b66920 100644
--- a/src/policy/settings.h
+++ b/src/policy/settings.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/pow.cpp b/src/pow.cpp
index 1414d3756..e27dbfbb2 100644
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/pow.h b/src/pow.h
index 1d802cd01..917288ef8 100644
--- a/src/pow.h
+++ b/src/pow.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/prevector.h b/src/prevector.h
index 99e575163..aa62b8ae3 100644
--- a/src/prevector.h
+++ b/src/prevector.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/primitives/block.cpp b/src/primitives/block.cpp
index a0c2e3f12..1fef28500 100644
--- a/src/primitives/block.cpp
+++ b/src/primitives/block.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/primitives/block.h b/src/primitives/block.h
index 750d42efb..be0c7810c 100644
--- a/src/primitives/block.h
+++ b/src/primitives/block.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/primitives/transaction.cpp b/src/primitives/transaction.cpp
index 28c145f71..de9e44b04 100644
--- a/src/primitives/transaction.cpp
+++ b/src/primitives/transaction.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h
index aad991e2f..0704cd750 100644
--- a/src/primitives/transaction.h
+++ b/src/primitives/transaction.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/protocol.cpp b/src/protocol.cpp
index bdf236c2c..44158377c 100644
--- a/src/protocol.cpp
+++ b/src/protocol.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/protocol.h b/src/protocol.h
index a790a0690..5604d4125 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -61,7 +61,7 @@ public:
 };
 
 /**
- * Bitcoin protocol message types. When adding new message types, don't forget
+ * QuasarAppcoin protocol message types. When adding new message types, don't forget
  * to update allNetMessageTypes in protocol.cpp.
  */
 namespace NetMsgType {
@@ -69,100 +69,100 @@ namespace NetMsgType {
 /**
  * The version message provides information about the transmitting node to the
  * receiving node at the beginning of a connection.
- * @see https://bitcoin.org/en/developer-reference#version
+ * @see https://quasarappcoin.org/en/developer-reference#version
  */
 extern const char *VERSION;
 /**
  * The verack message acknowledges a previously-received version message,
  * informing the connecting node that it can begin to send other messages.
- * @see https://bitcoin.org/en/developer-reference#verack
+ * @see https://quasarappcoin.org/en/developer-reference#verack
  */
 extern const char *VERACK;
 /**
  * The addr (IP address) message relays connection information for peers on the
  * network.
- * @see https://bitcoin.org/en/developer-reference#addr
+ * @see https://quasarappcoin.org/en/developer-reference#addr
  */
 extern const char *ADDR;
 /**
  * The inv message (inventory message) transmits one or more inventories of
  * objects known to the transmitting peer.
- * @see https://bitcoin.org/en/developer-reference#inv
+ * @see https://quasarappcoin.org/en/developer-reference#inv
  */
 extern const char *INV;
 /**
  * The getdata message requests one or more data objects from another node.
- * @see https://bitcoin.org/en/developer-reference#getdata
+ * @see https://quasarappcoin.org/en/developer-reference#getdata
  */
 extern const char *GETDATA;
 /**
  * The merkleblock message is a reply to a getdata message which requested a
  * block using the inventory type MSG_MERKLEBLOCK.
  * @since protocol version 70001 as described by BIP37.
- * @see https://bitcoin.org/en/developer-reference#merkleblock
+ * @see https://quasarappcoin.org/en/developer-reference#merkleblock
  */
 extern const char *MERKLEBLOCK;
 /**
  * The getblocks message requests an inv message that provides block header
  * hashes starting from a particular point in the block chain.
- * @see https://bitcoin.org/en/developer-reference#getblocks
+ * @see https://quasarappcoin.org/en/developer-reference#getblocks
  */
 extern const char *GETBLOCKS;
 /**
  * The getheaders message requests a headers message that provides block
  * headers starting from a particular point in the block chain.
  * @since protocol version 31800.
- * @see https://bitcoin.org/en/developer-reference#getheaders
+ * @see https://quasarappcoin.org/en/developer-reference#getheaders
  */
 extern const char *GETHEADERS;
 /**
  * The tx message transmits a single transaction.
- * @see https://bitcoin.org/en/developer-reference#tx
+ * @see https://quasarappcoin.org/en/developer-reference#tx
  */
 extern const char *TX;
 /**
  * The headers message sends one or more block headers to a node which
  * previously requested certain headers with a getheaders message.
  * @since protocol version 31800.
- * @see https://bitcoin.org/en/developer-reference#headers
+ * @see https://quasarappcoin.org/en/developer-reference#headers
  */
 extern const char *HEADERS;
 /**
  * The block message transmits a single serialized block.
- * @see https://bitcoin.org/en/developer-reference#block
+ * @see https://quasarappcoin.org/en/developer-reference#block
  */
 extern const char *BLOCK;
 /**
  * The getaddr message requests an addr message from the receiving node,
  * preferably one with lots of IP addresses of other receiving nodes.
- * @see https://bitcoin.org/en/developer-reference#getaddr
+ * @see https://quasarappcoin.org/en/developer-reference#getaddr
  */
 extern const char *GETADDR;
 /**
  * The mempool message requests the TXIDs of transactions that the receiving
  * node has verified as valid but which have not yet appeared in a block.
  * @since protocol version 60002.
- * @see https://bitcoin.org/en/developer-reference#mempool
+ * @see https://quasarappcoin.org/en/developer-reference#mempool
  */
 extern const char *MEMPOOL;
 /**
  * The ping message is sent periodically to help confirm that the receiving
  * peer is still connected.
- * @see https://bitcoin.org/en/developer-reference#ping
+ * @see https://quasarappcoin.org/en/developer-reference#ping
  */
 extern const char *PING;
 /**
  * The pong message replies to a ping message, proving to the pinging node that
  * the ponging node is still alive.
  * @since protocol version 60001 as described by BIP31.
- * @see https://bitcoin.org/en/developer-reference#pong
+ * @see https://quasarappcoin.org/en/developer-reference#pong
  */
 extern const char *PONG;
 /**
  * The notfound message is a reply to a getdata message which requested an
  * object the receiving node does not have available for relay.
  * @since protocol version 70001.
- * @see https://bitcoin.org/en/developer-reference#notfound
+ * @see https://quasarappcoin.org/en/developer-reference#notfound
  */
 extern const char *NOTFOUND;
 /**
@@ -171,7 +171,7 @@ extern const char *NOTFOUND;
  * @since protocol version 70001 as described by BIP37.
  *   Only available with service bit NODE_BLOOM since protocol version
  *   70011 as described by BIP111.
- * @see https://bitcoin.org/en/developer-reference#filterload
+ * @see https://quasarappcoin.org/en/developer-reference#filterload
  */
 extern const char *FILTERLOAD;
 /**
@@ -180,7 +180,7 @@ extern const char *FILTERLOAD;
  * @since protocol version 70001 as described by BIP37.
  *   Only available with service bit NODE_BLOOM since protocol version
  *   70011 as described by BIP111.
- * @see https://bitcoin.org/en/developer-reference#filteradd
+ * @see https://quasarappcoin.org/en/developer-reference#filteradd
  */
 extern const char *FILTERADD;
 /**
@@ -189,21 +189,21 @@ extern const char *FILTERADD;
  * @since protocol version 70001 as described by BIP37.
  *   Only available with service bit NODE_BLOOM since protocol version
  *   70011 as described by BIP111.
- * @see https://bitcoin.org/en/developer-reference#filterclear
+ * @see https://quasarappcoin.org/en/developer-reference#filterclear
  */
 extern const char *FILTERCLEAR;
 /**
  * The reject message informs the receiving node that one of its previous
  * messages has been rejected.
  * @since protocol version 70002 as described by BIP61.
- * @see https://bitcoin.org/en/developer-reference#reject
+ * @see https://quasarappcoin.org/en/developer-reference#reject
  */
 extern const char *REJECT;
 /**
  * Indicates that a node prefers to receive new block announcements via a
  * "headers" message rather than an "inv".
  * @since protocol version 70012 as described by BIP130.
- * @see https://bitcoin.org/en/developer-reference#sendheaders
+ * @see https://quasarappcoin.org/en/developer-reference#sendheaders
  */
 extern const char *SENDHEADERS;
 /**
@@ -248,14 +248,14 @@ enum ServiceFlags : uint64_t {
     // Nothing
     NODE_NONE = 0,
     // NODE_NETWORK means that the node is capable of serving the complete block chain. It is currently
-    // set by all Bitcoin Core non pruned nodes, and is unset by SPV clients or other light clients.
+    // set by all QuasarAppcoin Core non pruned nodes, and is unset by SPV clients or other light clients.
     NODE_NETWORK = (1 << 0),
     // NODE_GETUTXO means the node is capable of responding to the getutxo protocol request.
-    // Bitcoin Core does not support this but a patch set called Bitcoin XT does.
+    // QuasarAppcoin Core does not support this but a patch set called QuasarAppcoin XT does.
     // See BIP 64 for details on how this is implemented.
     NODE_GETUTXO = (1 << 1),
     // NODE_BLOOM means the node is capable and willing to handle bloom-filtered connections.
-    // Bitcoin Core nodes used to support this by default, without advertising this bit,
+    // QuasarAppcoin Core nodes used to support this by default, without advertising this bit,
     // but no longer do as of protocol version 70011 (= NO_BLOOM_VERSION)
     NODE_BLOOM = (1 << 2),
     // NODE_WITNESS indicates that a node can be asked for blocks and transactions including
@@ -271,7 +271,7 @@ enum ServiceFlags : uint64_t {
 
     // Bits 24-31 are reserved for temporary experiments. Just pick a bit that
     // isn't getting used, or one not being used much, and notify the
-    // bitcoin-development mailing list. Remember that service bits are just
+    // quasarappcoin-development mailing list. Remember that service bits are just
     // unauthenticated advertisements, so your code must be robust against
     // collisions and other cases where nodes may be advertising a service they
     // do not actually support. Other service bits should be allocated via the
diff --git a/src/psbt.cpp b/src/psbt.cpp
index 97bda51a6..4318f057f 100644
--- a/src/psbt.cpp
+++ b/src/psbt.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/psbt.h b/src/psbt.h
index 1bc1e91a8..7b23b98f5 100644
--- a/src/psbt.h
+++ b/src/psbt.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -388,7 +388,7 @@ struct PartiallySignedTransaction
     bool IsNull() const;
 
     /** Merge psbt into this. The two psbts must have the same underlying CTransaction (i.e. the
-      * same actual Bitcoin transaction.) Returns true if the merge succeeded, false otherwise. */
+      * same actual QuasarAppcoin transaction.) Returns true if the merge succeeded, false otherwise. */
     NODISCARD bool Merge(const PartiallySignedTransaction& psbt);
     bool IsSane() const;
     bool AddInput(const CTxIn& txin, PSBTInput& psbtin);
diff --git a/src/pubkey.cpp b/src/pubkey.cpp
index d38df716b..71f9be3c0 100644
--- a/src/pubkey.cpp
+++ b/src/pubkey.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Copyright (c) 2017 The Zcash developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
@@ -20,7 +20,7 @@ secp256k1_context* secp256k1_context_verify = nullptr;
  *
  *  Supported violations include negative integers, excessive padding, garbage
  *  at the end, and overly long length descriptors. This is safe to use in
- *  Bitcoin because since the activation of BIP66, signatures are verified to be
+ *  QuasarAppcoin because since the activation of BIP66, signatures are verified to be
  *  strict DER before being passed to this module, and we know it supports all
  *  violations present in the blockchain before that point.
  */
@@ -178,7 +178,7 @@ bool CPubKey::Verify(const uint256 &hash, const std::vector<unsigned char>& vchS
         return false;
     }
     /* libsecp256k1's ECDSA verification requires lower-S signatures, which have
-     * not historically been enforced in Bitcoin, so normalize them first. */
+     * not historically been enforced in QuasarAppcoin, so normalize them first. */
     secp256k1_ecdsa_signature_normalize(secp256k1_context_verify, &sig, &sig);
     return secp256k1_ecdsa_verify(secp256k1_context_verify, &sig, hash.begin(), &pubkey);
 }
diff --git a/src/pubkey.h b/src/pubkey.h
index 089324ffd..f938daa69 100644
--- a/src/pubkey.h
+++ b/src/pubkey.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Copyright (c) 2017 The Zcash developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/qt/addressbookpage.cpp b/src/qt/addressbookpage.cpp
index 50d6afabc..f9dd06ae6 100644
--- a/src/qt/addressbookpage.cpp
+++ b/src/qt/addressbookpage.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -102,12 +102,12 @@ AddressBookPage::AddressBookPage(const PlatformStyle *platformStyle, Mode _mode,
     switch(tab)
     {
     case SendingTab:
-        ui->labelExplanation->setText(tr("These are your Bitcoin addresses for sending payments. Always check the amount and the receiving address before sending coins."));
+        ui->labelExplanation->setText(tr("These are your QuasarAppcoin addresses for sending payments. Always check the amount and the receiving address before sending coins."));
         ui->deleteAddress->setVisible(true);
         ui->newAddress->setVisible(true);
         break;
     case ReceivingTab:
-        ui->labelExplanation->setText(tr("These are your Bitcoin addresses for receiving payments. Use the 'Create new receiving address' button in the receive tab to create new addresses."));
+        ui->labelExplanation->setText(tr("These are your QuasarAppcoin addresses for receiving payments. Use the 'Create new receiving address' button in the receive tab to create new addresses."));
         ui->deleteAddress->setVisible(false);
         ui->newAddress->setVisible(false);
         break;
diff --git a/src/qt/addressbookpage.h b/src/qt/addressbookpage.h
index 6394d2680..507a2c1c3 100644
--- a/src/qt/addressbookpage.h
+++ b/src/qt/addressbookpage.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/addresstablemodel.cpp b/src/qt/addresstablemodel.cpp
index c3143e948..2f0a4fb3f 100644
--- a/src/qt/addresstablemodel.cpp
+++ b/src/qt/addresstablemodel.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -332,7 +332,7 @@ QModelIndex AddressTableModel::index(int row, int column, const QModelIndex &par
 void AddressTableModel::updateEntry(const QString &address,
         const QString &label, bool isMine, const QString &purpose, int status)
 {
-    // Update address book model from Bitcoin core
+    // Update address book model from QuasarAppcoin core
     priv->updateEntry(address, label, isMine, purpose, status);
 }
 
diff --git a/src/qt/addresstablemodel.h b/src/qt/addresstablemodel.h
index 035f3e057..07d85bde8 100644
--- a/src/qt/addresstablemodel.h
+++ b/src/qt/addresstablemodel.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -30,7 +30,7 @@ public:
 
     enum ColumnIndex {
         Label = 0,   /**< User specified label */
-        Address = 1  /**< Bitcoin address */
+        Address = 1  /**< QuasarAppcoin address */
     };
 
     enum RoleIndex {
diff --git a/src/qt/askpassphrasedialog.cpp b/src/qt/askpassphrasedialog.cpp
index a89a15bc9..c0e47e5a7 100644
--- a/src/qt/askpassphrasedialog.cpp
+++ b/src/qt/askpassphrasedialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/askpassphrasedialog.h b/src/qt/askpassphrasedialog.h
index ac31569f6..f9bcaac33 100644
--- a/src/qt/askpassphrasedialog.h
+++ b/src/qt/askpassphrasedialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/bantablemodel.cpp b/src/qt/bantablemodel.cpp
index 00c446cc6..f6283366f 100644
--- a/src/qt/bantablemodel.cpp
+++ b/src/qt/bantablemodel.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/bantablemodel.h b/src/qt/bantablemodel.h
index 9dec5fa6a..1a358a164 100644
--- a/src/qt/bantablemodel.h
+++ b/src/qt/bantablemodel.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index 81255aaae..7c8314692 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -114,11 +114,11 @@ static void initTranslations(QTranslator &qtTranslatorBase, QTranslator &qtTrans
     if (qtTranslator.load("qt_" + lang_territory, QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
         QApplication::installTranslator(&qtTranslator);
 
-    // Load e.g. bitcoin_de.qm (shortcut "de" needs to be defined in bitcoin.qrc)
+    // Load e.g. bitcoin_de.qm (shortcut "de" needs to be defined in quasarappcoin.qrc)
     if (translatorBase.load(lang, ":/translations/"))
         QApplication::installTranslator(&translatorBase);
 
-    // Load e.g. bitcoin_de_DE.qm (shortcut "de_DE" needs to be defined in bitcoin.qrc)
+    // Load e.g. bitcoin_de_DE.qm (shortcut "de_DE" needs to be defined in quasarappcoin.qrc)
     if (translator.load(lang_territory, ":/translations/"))
         QApplication::installTranslator(&translator);
 }
@@ -367,7 +367,7 @@ void BitcoinApplication::initializeResult(bool success)
 
 #ifdef ENABLE_WALLET
         // Now that initialization/startup is done, process any command-line
-        // bitcoin: URIs or payment requests:
+        // quasarappcoin: URIs or payment requests:
         if (paymentServer) {
             connect(paymentServer, &PaymentServer::receivedPaymentRequest, window, &BitcoinGUI::handlePaymentRequest);
             connect(window, &BitcoinGUI::receivedURI, paymentServer, &PaymentServer::handleURIOrFile);
@@ -391,7 +391,7 @@ void BitcoinApplication::shutdownResult()
 
 void BitcoinApplication::handleRunawayException(const QString &message)
 {
-    QMessageBox::critical(nullptr, "Runaway exception", BitcoinGUI::tr("A fatal error occurred. Bitcoin can no longer continue safely and will quit.") + QString("\n\n") + message);
+    QMessageBox::critical(nullptr, "Runaway exception", BitcoinGUI::tr("A fatal error occurred. QuasarAppcoin can no longer continue safely and will quit.") + QString("\n\n") + message);
     ::exit(EXIT_FAILURE);
 }
 
@@ -496,7 +496,7 @@ int GuiMain(int argc, char* argv[])
     if (!Intro::pickDataDirectory(*node))
         return EXIT_SUCCESS;
 
-    /// 6. Determine availability of data and blocks directory and parse bitcoin.conf
+    /// 6. Determine availability of data and blocks directory and parse quasarappcoin.conf
     /// - Do not call GetDataDir(true) before this step finishes
     if (!fs::is_directory(GetDataDir(false)))
     {
@@ -546,7 +546,7 @@ int GuiMain(int argc, char* argv[])
         exit(EXIT_SUCCESS);
 
     // Start up the payment server early, too, so impatient users that click on
-    // bitcoin: links repeatedly have their payment requests routed to this process:
+    // quasarappcoin: links repeatedly have their payment requests routed to this process:
     app.createPaymentServer();
 #endif
 
diff --git a/src/qt/bitcoin.h b/src/qt/bitcoin.h
index 370712d95..891d3d7d5 100644
--- a/src/qt/bitcoin.h
+++ b/src/qt/bitcoin.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2016 The Bitcoin Core developers
+// Copyright (c) 2011-2016 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -27,7 +27,7 @@ class Handler;
 class Node;
 } // namespace interfaces
 
-/** Class encapsulating Bitcoin Core startup and shutdown.
+/** Class encapsulating QuasarAppcoin Core startup and shutdown.
  * Allows running startup and shutdown in a different thread from the UI thread.
  */
 class BitcoinCore: public QObject
@@ -52,7 +52,7 @@ private:
     interfaces::Node& m_node;
 };
 
-/** Main Bitcoin application object */
+/** Main QuasarAppcoin application object */
 class BitcoinApplication: public QApplication
 {
     Q_OBJECT
diff --git a/src/qt/bitcoinaddressvalidator.cpp b/src/qt/bitcoinaddressvalidator.cpp
index a2adca6ea..fec487126 100644
--- a/src/qt/bitcoinaddressvalidator.cpp
+++ b/src/qt/bitcoinaddressvalidator.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -88,7 +88,7 @@ BitcoinAddressCheckValidator::BitcoinAddressCheckValidator(QObject *parent) :
 QValidator::State BitcoinAddressCheckValidator::validate(QString &input, int &pos) const
 {
     Q_UNUSED(pos);
-    // Validate the passed Bitcoin address
+    // Validate the passed QuasarAppcoin address
     if (IsValidDestinationString(input.toStdString())) {
         return QValidator::Acceptable;
     }
diff --git a/src/qt/bitcoinaddressvalidator.h b/src/qt/bitcoinaddressvalidator.h
index 30d4a26d0..3d5c04649 100644
--- a/src/qt/bitcoinaddressvalidator.h
+++ b/src/qt/bitcoinaddressvalidator.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2014 The Bitcoin Core developers
+// Copyright (c) 2011-2014 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -20,7 +20,7 @@ public:
     State validate(QString &input, int &pos) const;
 };
 
-/** Bitcoin address widget validator, checks for a valid bitcoin address.
+/** QuasarAppcoin address widget validator, checks for a valid quasarappcoin address.
  */
 class BitcoinAddressCheckValidator : public QValidator
 {
diff --git a/src/qt/bitcoinamountfield.cpp b/src/qt/bitcoinamountfield.cpp
index 5854ade65..224f6512b 100644
--- a/src/qt/bitcoinamountfield.cpp
+++ b/src/qt/bitcoinamountfield.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/bitcoinamountfield.h b/src/qt/bitcoinamountfield.h
index 2db6b65f2..936cb3acb 100644
--- a/src/qt/bitcoinamountfield.h
+++ b/src/qt/bitcoinamountfield.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -15,14 +15,14 @@ QT_BEGIN_NAMESPACE
 class QValueComboBox;
 QT_END_NAMESPACE
 
-/** Widget for entering bitcoin amounts.
+/** Widget for entering quasarappcoin amounts.
   */
 class BitcoinAmountField: public QWidget
 {
     Q_OBJECT
 
     // ugly hack: for some unknown reason CAmount (instead of qint64) does not work here as expected
-    // discussion: https://github.com/bitcoin/bitcoin/pull/5117
+    // discussion: https://github.com/quasarappcoin/quasarappcoin/pull/5117
     Q_PROPERTY(qint64 value READ value WRITE setValue NOTIFY valueChanged USER true)
 
 public:
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index abf9136ee..c2bf1e4ce 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -245,7 +245,7 @@ void BitcoinGUI::createActions()
     tabGroup->addAction(overviewAction);
 
     sendCoinsAction = new QAction(platformStyle->SingleColorIcon(":/icons/send"), tr("&Send"), this);
-    sendCoinsAction->setStatusTip(tr("Send coins to a Bitcoin address"));
+    sendCoinsAction->setStatusTip(tr("Send coins to a QuasarAppcoin address"));
     sendCoinsAction->setToolTip(sendCoinsAction->statusTip());
     sendCoinsAction->setCheckable(true);
     sendCoinsAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_2));
@@ -256,7 +256,7 @@ void BitcoinGUI::createActions()
     sendCoinsMenuAction->setToolTip(sendCoinsMenuAction->statusTip());
 
     receiveCoinsAction = new QAction(platformStyle->SingleColorIcon(":/icons/receiving_addresses"), tr("&Receive"), this);
-    receiveCoinsAction->setStatusTip(tr("Request payments (generates QR codes and bitcoin: URIs)"));
+    receiveCoinsAction->setStatusTip(tr("Request payments (generates QR codes and quasarappcoin: URIs)"));
     receiveCoinsAction->setToolTip(receiveCoinsAction->statusTip());
     receiveCoinsAction->setCheckable(true);
     receiveCoinsAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_3));
@@ -316,9 +316,9 @@ void BitcoinGUI::createActions()
     changePassphraseAction = new QAction(platformStyle->TextColorIcon(":/icons/key"), tr("&Change Passphrase..."), this);
     changePassphraseAction->setStatusTip(tr("Change the passphrase used for wallet encryption"));
     signMessageAction = new QAction(platformStyle->TextColorIcon(":/icons/edit"), tr("Sign &message..."), this);
-    signMessageAction->setStatusTip(tr("Sign messages with your Bitcoin addresses to prove you own them"));
+    signMessageAction->setStatusTip(tr("Sign messages with your QuasarAppcoin addresses to prove you own them"));
     verifyMessageAction = new QAction(platformStyle->TextColorIcon(":/icons/verify"), tr("&Verify message..."), this);
-    verifyMessageAction->setStatusTip(tr("Verify messages to ensure they were signed with specified Bitcoin addresses"));
+    verifyMessageAction->setStatusTip(tr("Verify messages to ensure they were signed with specified QuasarAppcoin addresses"));
 
     openRPCConsoleAction = new QAction(platformStyle->TextColorIcon(":/icons/debugwindow"), tr("&Debug window"), this);
     openRPCConsoleAction->setStatusTip(tr("Open debugging and diagnostic console"));
@@ -332,7 +332,7 @@ void BitcoinGUI::createActions()
     usedReceivingAddressesAction->setStatusTip(tr("Show the list of used receiving addresses and labels"));
 
     openAction = new QAction(platformStyle->TextColorIcon(":/icons/open"), tr("Open &URI..."), this);
-    openAction->setStatusTip(tr("Open a bitcoin: URI or payment request"));
+    openAction->setStatusTip(tr("Open a quasarappcoin: URI or payment request"));
 
     m_open_wallet_action = new QAction(tr("Open Wallet"), this);
     m_open_wallet_action->setMenu(new QMenu(this));
@@ -343,7 +343,7 @@ void BitcoinGUI::createActions()
 
     showHelpMessageAction = new QAction(platformStyle->TextColorIcon(":/icons/info"), tr("&Command-line options"), this);
     showHelpMessageAction->setMenuRole(QAction::NoRole);
-    showHelpMessageAction->setStatusTip(tr("Show the %1 help message to get a list with possible Bitcoin command-line options").arg(tr(PACKAGE_NAME)));
+    showHelpMessageAction->setStatusTip(tr("Show the %1 help message to get a list with possible QuasarAppcoin command-line options").arg(tr(PACKAGE_NAME)));
 
     connect(quitAction, &QAction::triggered, qApp, QApplication::quit);
     connect(aboutAction, &QAction::triggered, this, &BitcoinGUI::aboutClicked);
@@ -865,7 +865,7 @@ void BitcoinGUI::updateNetworkState()
     QString tooltip;
 
     if (m_node.getNetworkActive()) {
-        tooltip = tr("%n active connection(s) to Bitcoin network", "", count) + QString(".<br>") + tr("Click to disable network activity.");
+        tooltip = tr("%n active connection(s) to QuasarAppcoin network", "", count) + QString(".<br>") + tr("Click to disable network activity.");
     } else {
         tooltip = tr("Network activity disabled.") + QString("<br>") + tr("Click to enable network activity again.");
         icon = ":/icons/network_disabled";
@@ -1024,7 +1024,7 @@ void BitcoinGUI::setNumBlocks(int count, const QDateTime& blockDate, double nVer
 
 void BitcoinGUI::message(const QString &title, const QString &message, unsigned int style, bool *ret)
 {
-    QString strTitle = tr("Bitcoin"); // default title
+    QString strTitle = tr("QuasarAppcoin"); // default title
     // Default to information icon
     int nMBoxIcon = QMessageBox::Information;
     int nNotifyIcon = Notificator::Information;
@@ -1050,7 +1050,7 @@ void BitcoinGUI::message(const QString &title, const QString &message, unsigned
             break;
         }
     }
-    // Append title to "Bitcoin - "
+    // Append title to "QuasarAppcoin - "
     if (!msgType.isEmpty())
         strTitle += " - " + msgType;
 
diff --git a/src/qt/bitcoingui.h b/src/qt/bitcoingui.h
index b58ccbb45..22b610af8 100644
--- a/src/qt/bitcoingui.h
+++ b/src/qt/bitcoingui.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -58,7 +58,7 @@ class ClickableProgressBar;
 }
 
 /**
-  Bitcoin GUI main class. This class represents the main window of the Bitcoin UI. It communicates with both the client and
+  QuasarAppcoin GUI main class. This class represents the main window of the QuasarAppcoin UI. It communicates with both the client and
   wallet models to give the user an up-to-date view of the current core state.
 */
 class BitcoinGUI : public QMainWindow
@@ -81,7 +81,7 @@ public:
 
 #ifdef ENABLE_WALLET
     /** Set the wallet model.
-        The wallet model represents a bitcoin wallet, and offers access to the list of transactions, address book and sending
+        The wallet model represents a quasarappcoin wallet, and offers access to the list of transactions, address book and sending
         functionality.
     */
     void addWallet(WalletModel* walletModel);
diff --git a/src/qt/bitcoinstrings.cpp b/src/qt/bitcoinstrings.cpp
index dc997e96c..eed0895fb 100644
--- a/src/qt/bitcoinstrings.cpp
+++ b/src/qt/bitcoinstrings.cpp
@@ -9,189 +9,189 @@
 #define UNUSED
 #endif
 static const char UNUSED *bitcoin_strings[] = {
-QT_TRANSLATE_NOOP("bitcoin-core", "Bitcoin Core"),
-QT_TRANSLATE_NOOP("bitcoin-core", "The %s developers"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", "QuasarAppcoin Core"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "The %s developers"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "-maxtxfee is set very high! Fees this large could be paid on a single "
 "transaction."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Can't generate a change-address key. Private keys are disabled for this "
 "wallet."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Cannot obtain a lock on data directory %s. %s is probably already running."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Cannot provide specific connections and have addrman find outgoing "
 "connections at the same."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Cannot upgrade a non HD split wallet without upgrading to support pre split "
 "keypool. Please use -upgradewallet=169900 or -upgradewallet with no version "
 "specified."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Distributed under the MIT software license, see the accompanying file %s or "
 "%s"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Error reading %s! All keys read correctly, but transaction data or address "
 "book entries might be missing or incorrect."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Error: Listening for incoming connections failed (listen returned error %s)"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Fee estimation failed. Fallbackfee is disabled. Wait a few blocks or enable -"
 "fallbackfee."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Invalid amount for -maxtxfee=<amount>: '%s' (must be at least the minrelay "
 "fee of %s to prevent stuck transactions)"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Please check that your computer's date and time are correct! If your clock "
 "is wrong, %s will not work properly."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Please contribute if you find %s useful. Visit %s for further information "
 "about the software."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Prune configured below the minimum of %d MiB.  Please use a higher number."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Prune: last wallet synchronisation goes beyond pruned data. You need to -"
 "reindex (download the whole blockchain again in case of pruned node)"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Rescans are not possible in pruned mode. You will need to use -reindex which "
 "will download the whole blockchain again."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "The block database contains a block which appears to be from the future. "
 "This may be due to your computer's date and time being set incorrectly. Only "
 "rebuild the block database if you are sure that your computer's date and "
 "time are correct"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "The transaction amount is too small to send after the fee has been deducted"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "This is a pre-release test build - use at your own risk - do not use for "
 "mining or merchant applications"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "This is the transaction fee you may discard if change is smaller than dust "
 "at this level"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "This is the transaction fee you may pay when fee estimates are not available."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "This product includes software developed by the OpenSSL Project for use in "
 "the OpenSSL Toolkit %s and cryptographic software written by Eric Young and "
 "UPnP software written by Thomas Bernard."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Total length of network version string (%i) exceeds maximum length (%i). "
 "Reduce the number or size of uacomments."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Unable to replay blocks. You will need to rebuild the database using -"
 "reindex-chainstate."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Unable to rewind the database to a pre-fork state. You will need to "
 "redownload the blockchain"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Warning: Private keys detected in wallet {%s} with disabled private keys"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Warning: The network does not appear to fully agree! Some miners appear to "
 "be experiencing issues."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Warning: Unknown block versions being mined! It's possible unknown rules are "
 "in effect"),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Warning: Wallet file corrupt, data salvaged! Original %s saved as %s in %s; "
 "if your balance or transactions are incorrect you should restore from a "
 "backup."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "Warning: We do not appear to fully agree with our peers! You may need to "
 "upgrade, or other nodes may need to upgrade."),
-QT_TRANSLATE_NOOP("bitcoin-core", ""
+QT_TRANSLATE_NOOP("quasarappcoin-core", ""
 "You need to rebuild the database using -reindex to go back to unpruned "
 "mode.  This will redownload the entire blockchain"),
-QT_TRANSLATE_NOOP("bitcoin-core", "%d of last 100 blocks have unexpected version"),
-QT_TRANSLATE_NOOP("bitcoin-core", "%s corrupt, salvage failed"),
-QT_TRANSLATE_NOOP("bitcoin-core", "%s is set very high!"),
-QT_TRANSLATE_NOOP("bitcoin-core", "-maxmempool must be at least %d MB"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Cannot downgrade wallet"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Cannot resolve -%s address: '%s'"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Cannot write to data directory '%s'; check permissions."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Change index out of range"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Config setting for %s only applied on %s network when in [%s] section."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Copyright (C) %i-%i"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Corrupted block database detected"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Do you want to rebuild the block database now?"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Done loading"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error initializing block database"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error initializing wallet database environment %s!"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error loading %s"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error loading %s: Private keys can only be disabled during creation"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error loading %s: Wallet corrupted"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error loading %s: Wallet requires newer version of %s"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error loading block database"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error loading wallet %s. Duplicate -wallet filename specified."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error opening block database"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error reading from database, shutting down."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error upgrading chainstate database"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error: A fatal internal error occurred, see debug.log for details"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error: Disk space is low for %s"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Error: Disk space is low!"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Failed to listen on any port. Use -listen=0 if you want this."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Failed to rescan the wallet during initialization"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Importing..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Incorrect or no genesis block found. Wrong datadir for network?"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Information"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Initialization sanity check failed. %s is shutting down."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Insufficient funds"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Invalid -onion address or hostname: '%s'"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Invalid -proxy address or hostname: '%s'"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Invalid amount for -%s=<amount>: '%s'"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Invalid amount for -discardfee=<amount>: '%s'"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Invalid amount for -fallbackfee=<amount>: '%s'"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Invalid amount for -paytxfee=<amount>: '%s' (must be at least %s)"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Invalid netmask specified in -whitelist: '%s'"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Keypool ran out, please call keypoolrefill first"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Loading P2P addresses..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Loading banlist..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Loading block index..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Loading wallet..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Need to specify a port with -whitebind: '%s'"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Not enough file descriptors available."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Prune cannot be configured with a negative value."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Prune mode is incompatible with -txindex."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Pruning blockstore..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Reducing -maxconnections from %d to %d, because of system limitations."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Replaying blocks..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Rescanning..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Rewinding blocks..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Section [%s] is not recognized."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Signing transaction failed"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Specified -walletdir \"%s\" does not exist"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Specified -walletdir \"%s\" is a relative path"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Specified -walletdir \"%s\" is not a directory"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Specified blocks directory \"%s\" does not exist."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Starting network threads..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "The source code is available from %s."),
-QT_TRANSLATE_NOOP("bitcoin-core", "The specified config file %s does not exist\n"),
-QT_TRANSLATE_NOOP("bitcoin-core", "The transaction amount is too small to pay the fee"),
-QT_TRANSLATE_NOOP("bitcoin-core", "The wallet will avoid paying less than the minimum relay fee."),
-QT_TRANSLATE_NOOP("bitcoin-core", "This is experimental software."),
-QT_TRANSLATE_NOOP("bitcoin-core", "This is the minimum transaction fee you pay on every transaction."),
-QT_TRANSLATE_NOOP("bitcoin-core", "This is the transaction fee you will pay if you send a transaction."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Transaction amount too small"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Transaction amounts must not be negative"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Transaction fee and change calculation failed"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Transaction has too long of a mempool chain"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Transaction must have at least one recipient"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Transaction too large for fee policy"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Transaction too large"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Unable to bind to %s on this computer (bind returned error %s)"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Unable to bind to %s on this computer. %s is probably already running."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Unable to generate initial keys"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Unable to generate keys"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Unable to start HTTP server. See debug log for details."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Unknown network specified in -onlynet: '%s'"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Unsupported logging category %s=%s."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Upgrading UTXO database"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Upgrading txindex database"),
-QT_TRANSLATE_NOOP("bitcoin-core", "User Agent comment (%s) contains unsafe characters."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Verifying blocks..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Verifying wallet(s)..."),
-QT_TRANSLATE_NOOP("bitcoin-core", "Wallet %s resides outside wallet directory %s"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Wallet needed to be rewritten: restart %s to complete"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Warning"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Warning: unknown new rules activated (versionbit %i)"),
-QT_TRANSLATE_NOOP("bitcoin-core", "Zapping all transactions from wallet..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "%d of last 100 blocks have unexpected version"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "%s corrupt, salvage failed"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "%s is set very high!"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "-maxmempool must be at least %d MB"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Cannot downgrade wallet"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Cannot resolve -%s address: '%s'"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Cannot write to data directory '%s'; check permissions."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Change index out of range"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Config setting for %s only applied on %s network when in [%s] section."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Copyright (C) %i-%i"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Corrupted block database detected"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Do you want to rebuild the block database now?"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Done loading"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error initializing block database"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error initializing wallet database environment %s!"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error loading %s"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error loading %s: Private keys can only be disabled during creation"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error loading %s: Wallet corrupted"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error loading %s: Wallet requires newer version of %s"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error loading block database"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error loading wallet %s. Duplicate -wallet filename specified."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error opening block database"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error reading from database, shutting down."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error upgrading chainstate database"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error: A fatal internal error occurred, see debug.log for details"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error: Disk space is low for %s"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Error: Disk space is low!"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Failed to listen on any port. Use -listen=0 if you want this."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Failed to rescan the wallet during initialization"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Importing..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Incorrect or no genesis block found. Wrong datadir for network?"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Information"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Initialization sanity check failed. %s is shutting down."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Insufficient funds"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Invalid -onion address or hostname: '%s'"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Invalid -proxy address or hostname: '%s'"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Invalid amount for -%s=<amount>: '%s'"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Invalid amount for -discardfee=<amount>: '%s'"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Invalid amount for -fallbackfee=<amount>: '%s'"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Invalid amount for -paytxfee=<amount>: '%s' (must be at least %s)"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Invalid netmask specified in -whitelist: '%s'"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Keypool ran out, please call keypoolrefill first"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Loading P2P addresses..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Loading banlist..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Loading block index..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Loading wallet..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Need to specify a port with -whitebind: '%s'"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Not enough file descriptors available."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Prune cannot be configured with a negative value."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Prune mode is incompatible with -txindex."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Pruning blockstore..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Reducing -maxconnections from %d to %d, because of system limitations."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Replaying blocks..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Rescanning..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Rewinding blocks..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Section [%s] is not recognized."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Signing transaction failed"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Specified -walletdir \"%s\" does not exist"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Specified -walletdir \"%s\" is a relative path"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Specified -walletdir \"%s\" is not a directory"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Specified blocks directory \"%s\" does not exist."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Starting network threads..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "The source code is available from %s."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "The specified config file %s does not exist\n"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "The transaction amount is too small to pay the fee"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "The wallet will avoid paying less than the minimum relay fee."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "This is experimental software."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "This is the minimum transaction fee you pay on every transaction."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "This is the transaction fee you will pay if you send a transaction."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Transaction amount too small"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Transaction amounts must not be negative"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Transaction fee and change calculation failed"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Transaction has too long of a mempool chain"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Transaction must have at least one recipient"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Transaction too large for fee policy"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Transaction too large"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Unable to bind to %s on this computer (bind returned error %s)"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Unable to bind to %s on this computer. %s is probably already running."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Unable to generate initial keys"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Unable to generate keys"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Unable to start HTTP server. See debug log for details."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Unknown network specified in -onlynet: '%s'"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Unsupported logging category %s=%s."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Upgrading UTXO database"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Upgrading txindex database"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "User Agent comment (%s) contains unsafe characters."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Verifying blocks..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Verifying wallet(s)..."),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Wallet %s resides outside wallet directory %s"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Wallet needed to be rewritten: restart %s to complete"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Warning"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Warning: unknown new rules activated (versionbit %i)"),
+QT_TRANSLATE_NOOP("quasarappcoin-core", "Zapping all transactions from wallet..."),
 };
diff --git a/src/qt/bitcoinunits.cpp b/src/qt/bitcoinunits.cpp
index 8aa1fdba4..8710dd162 100644
--- a/src/qt/bitcoinunits.cpp
+++ b/src/qt/bitcoinunits.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/bitcoinunits.h b/src/qt/bitcoinunits.h
index 06a1544fa..f3b36f924 100644
--- a/src/qt/bitcoinunits.h
+++ b/src/qt/bitcoinunits.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -41,7 +41,7 @@
 #define THIN_SP_UTF8 REAL_THIN_SP_UTF8
 #define THIN_SP_HTML HTML_HACK_SP
 
-/** Bitcoin unit definitions. Encapsulates parsing and formatting
+/** QuasarAppcoin unit definitions. Encapsulates parsing and formatting
    and serves as list model for drop-down selection boxes.
 */
 class BitcoinUnits: public QAbstractListModel
@@ -51,8 +51,8 @@ class BitcoinUnits: public QAbstractListModel
 public:
     explicit BitcoinUnits(QObject *parent);
 
-    /** Bitcoin units.
-      @note Source: https://en.bitcoin.it/wiki/Units . Please add only sensible ones
+    /** QuasarAppcoin units.
+      @note Source: https://en.quasarappcoin.it/wiki/Units . Please add only sensible ones
      */
     enum Unit
     {
diff --git a/src/qt/clientmodel.cpp b/src/qt/clientmodel.cpp
index 88a35534c..3dd487b18 100644
--- a/src/qt/clientmodel.cpp
+++ b/src/qt/clientmodel.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
index 95f4521f0..0ee929b56 100644
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -40,7 +40,7 @@ enum NumConnections {
     CONNECTIONS_ALL  = (CONNECTIONS_IN | CONNECTIONS_OUT),
 };
 
-/** Model for Bitcoin network client. */
+/** Model for QuasarAppcoin network client. */
 class ClientModel : public QObject
 {
     Q_OBJECT
diff --git a/src/qt/coincontroldialog.cpp b/src/qt/coincontroldialog.cpp
index 0d9f1adcd..7ee68322f 100644
--- a/src/qt/coincontroldialog.cpp
+++ b/src/qt/coincontroldialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -658,7 +658,7 @@ void CoinControlDialog::updateView()
             {
                 sAddress = QString::fromStdString(EncodeDestination(outputAddress));
 
-                // if listMode or change => show bitcoin address. In tree mode, address is not shown again for direct wallet address outputs
+                // if listMode or change => show quasarappcoin address. In tree mode, address is not shown again for direct wallet address outputs
                 if (!treeMode || (!(sAddress == sWalletAddress)))
                     itemOutput->setText(COLUMN_ADDRESS, sAddress);
             }
diff --git a/src/qt/coincontroldialog.h b/src/qt/coincontroldialog.h
index efc06a765..4394e11e7 100644
--- a/src/qt/coincontroldialog.h
+++ b/src/qt/coincontroldialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/coincontroltreewidget.cpp b/src/qt/coincontroltreewidget.cpp
index 4ffbd832e..313677e66 100644
--- a/src/qt/coincontroltreewidget.cpp
+++ b/src/qt/coincontroltreewidget.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/coincontroltreewidget.h b/src/qt/coincontroltreewidget.h
index 88fc8b704..8a036ff3d 100644
--- a/src/qt/coincontroltreewidget.h
+++ b/src/qt/coincontroltreewidget.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2014 The Bitcoin Core developers
+// Copyright (c) 2011-2014 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/csvmodelwriter.cpp b/src/qt/csvmodelwriter.cpp
index 656afb6e8..b87be71c8 100644
--- a/src/qt/csvmodelwriter.cpp
+++ b/src/qt/csvmodelwriter.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/csvmodelwriter.h b/src/qt/csvmodelwriter.h
index e8611bea3..5fb16e950 100644
--- a/src/qt/csvmodelwriter.h
+++ b/src/qt/csvmodelwriter.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2014 The Bitcoin Core developers
+// Copyright (c) 2011-2014 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/editaddressdialog.cpp b/src/qt/editaddressdialog.cpp
index 4711412ac..6738ac3d8 100644
--- a/src/qt/editaddressdialog.cpp
+++ b/src/qt/editaddressdialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -108,7 +108,7 @@ void EditAddressDialog::accept()
             break;
         case AddressTableModel::INVALID_ADDRESS:
             QMessageBox::warning(this, windowTitle(),
-                tr("The entered address \"%1\" is not a valid Bitcoin address.").arg(ui->addressEdit->text()),
+                tr("The entered address \"%1\" is not a valid QuasarAppcoin address.").arg(ui->addressEdit->text()),
                 QMessageBox::Ok, QMessageBox::Ok);
             break;
         case AddressTableModel::DUPLICATE_ADDRESS:
diff --git a/src/qt/editaddressdialog.h b/src/qt/editaddressdialog.h
index 4d0e0709b..9d95feba5 100644
--- a/src/qt/editaddressdialog.h
+++ b/src/qt/editaddressdialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/guiconstants.h b/src/qt/guiconstants.h
index 736ff13a4..d548a3129 100644
--- a/src/qt/guiconstants.h
+++ b/src/qt/guiconstants.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -46,11 +46,11 @@ static const int MAX_URI_LENGTH = 255;
 /* Number of frames in spinner animation */
 #define SPINNER_FRAMES 36
 
-#define QAPP_ORG_NAME "Bitcoin"
-#define QAPP_ORG_DOMAIN "bitcoin.org"
-#define QAPP_APP_NAME_DEFAULT "Bitcoin-Qt"
-#define QAPP_APP_NAME_TESTNET "Bitcoin-Qt-testnet"
-#define QAPP_APP_NAME_REGTEST "Bitcoin-Qt-regtest"
+#define QAPP_ORG_NAME "QuasarAppcoin"
+#define QAPP_ORG_DOMAIN "quasarappcoin.org"
+#define QAPP_APP_NAME_DEFAULT "QuasarAppcoin-Qt"
+#define QAPP_APP_NAME_TESTNET "QuasarAppcoin-Qt-testnet"
+#define QAPP_APP_NAME_REGTEST "QuasarAppcoin-Qt-regtest"
 
 /* One gigabyte (GB) in bytes */
 static constexpr uint64_t GB_BYTES{1000000000};
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 45f21d50f..ba20dbb9e 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -104,7 +104,7 @@ void setupAddressWidget(QValidatedLineEdit *widget, QWidget *parent)
     widget->setFont(fixedPitchFont());
     // We don't want translators to use own addresses in translations
     // and this is the only place, where this address is supplied.
-    widget->setPlaceholderText(QObject::tr("Enter a Bitcoin address (e.g. %1)").arg(
+    widget->setPlaceholderText(QObject::tr("Enter a QuasarAppcoin address (e.g. %1)").arg(
         QString::fromStdString(DummyAddress(Params()))));
     widget->setValidator(new BitcoinAddressEntryValidator(parent));
     widget->setCheckValidator(new BitcoinAddressCheckValidator(parent));
@@ -112,8 +112,8 @@ void setupAddressWidget(QValidatedLineEdit *widget, QWidget *parent)
 
 bool parseBitcoinURI(const QUrl &uri, SendCoinsRecipient *out)
 {
-    // return if URI is not valid or is no bitcoin: URI
-    if(!uri.isValid() || uri.scheme() != QString("bitcoin"))
+    // return if URI is not valid or is no quasarappcoin: URI
+    if(!uri.isValid() || uri.scheme() != QString("quasarappcoin"))
         return false;
 
     SendCoinsRecipient rv;
@@ -177,7 +177,7 @@ QString formatBitcoinURI(const SendCoinsRecipient &info)
 {
     bool bech_32 = info.address.startsWith(QString::fromStdString(Params().Bech32HRP() + "1"));
 
-    QString ret = QString("bitcoin:%1").arg(bech_32 ? info.address.toUpper() : info.address);
+    QString ret = QString("quasarappcoin:%1").arg(bech_32 ? info.address.toUpper() : info.address);
     int paramCount = 0;
 
     if (info.amount)
@@ -398,7 +398,7 @@ bool openBitcoinConf()
 
     configFile.close();
 
-    /* Open bitcoin.conf with the associated application */
+    /* Open quasarappcoin.conf with the associated application */
     return QDesktopServices::openUrl(QUrl::fromLocalFile(boostPathToQString(pathConfig)));
 }
 
@@ -546,15 +546,15 @@ fs::path static StartupShortcutPath()
 {
     std::string chain = gArgs.GetChainName();
     if (chain == CBaseChainParams::MAIN)
-        return GetSpecialFolderPath(CSIDL_STARTUP) / "Bitcoin.lnk";
+        return GetSpecialFolderPath(CSIDL_STARTUP) / "QuasarAppcoin.lnk";
     if (chain == CBaseChainParams::TESTNET) // Remove this special case when CBaseChainParams::TESTNET = "testnet4"
-        return GetSpecialFolderPath(CSIDL_STARTUP) / "Bitcoin (testnet).lnk";
-    return GetSpecialFolderPath(CSIDL_STARTUP) / strprintf("Bitcoin (%s).lnk", chain);
+        return GetSpecialFolderPath(CSIDL_STARTUP) / "QuasarAppcoin (testnet).lnk";
+    return GetSpecialFolderPath(CSIDL_STARTUP) / strprintf("QuasarAppcoin (%s).lnk", chain);
 }
 
 bool GetStartOnSystemStartup()
 {
-    // check for Bitcoin*.lnk
+    // check for QuasarAppcoin*.lnk
     return fs::exists(StartupShortcutPath());
 }
 
@@ -629,8 +629,8 @@ fs::path static GetAutostartFilePath()
 {
     std::string chain = gArgs.GetChainName();
     if (chain == CBaseChainParams::MAIN)
-        return GetAutostartDir() / "bitcoin.desktop";
-    return GetAutostartDir() / strprintf("bitcoin-%s.lnk", chain);
+        return GetAutostartDir() / "quasarappcoin.desktop";
+    return GetAutostartDir() / strprintf("quasarappcoin-%s.lnk", chain);
 }
 
 bool GetStartOnSystemStartup()
@@ -670,13 +670,13 @@ bool SetStartOnSystemStartup(bool fAutoStart)
         if (!optionFile.good())
             return false;
         std::string chain = gArgs.GetChainName();
-        // Write a bitcoin.desktop file to the autostart directory:
+        // Write a quasarappcoin.desktop file to the autostart directory:
         optionFile << "[Desktop Entry]\n";
         optionFile << "Type=Application\n";
         if (chain == CBaseChainParams::MAIN)
-            optionFile << "Name=Bitcoin\n";
+            optionFile << "Name=QuasarAppcoin\n";
         else
-            optionFile << strprintf("Name=Bitcoin (%s)\n", chain);
+            optionFile << strprintf("Name=QuasarAppcoin (%s)\n", chain);
         optionFile << "Exec=" << pszExePath << strprintf(" -min -testnet=%d -regtest=%d\n", gArgs.GetBoolArg("-testnet", false), gArgs.GetBoolArg("-regtest", false));
         optionFile << "Terminal=false\n";
         optionFile << "Hidden=false\n";
@@ -695,7 +695,7 @@ LSSharedFileListItemRef findStartupItemInList(CFArrayRef listSnapshot, LSSharedF
         return nullptr;
     }
 
-    // loop through the list of startup items and try to find the bitcoin app
+    // loop through the list of startup items and try to find the quasarappcoin app
     for(int i = 0; i < CFArrayGetCount(listSnapshot); i++) {
         LSSharedFileListItemRef item = (LSSharedFileListItemRef)CFArrayGetValueAtIndex(listSnapshot, i);
         UInt32 resolutionFlags = kLSSharedFileListNoUserInteraction | kLSSharedFileListDoNotMountVolumes;
@@ -752,7 +752,7 @@ bool SetStartOnSystemStartup(bool fAutoStart)
     LSSharedFileListItemRef foundItem = findStartupItemInList(listSnapshot, loginItems, bitcoinAppUrl);
 
     if(fAutoStart && !foundItem) {
-        // add bitcoin app to startup item list
+        // add quasarappcoin app to startup item list
         LSSharedFileListInsertItemURL(loginItems, kLSSharedFileListItemBeforeFirst, nullptr, nullptr, bitcoinAppUrl, nullptr, nullptr);
     }
     else if(!fAutoStart && foundItem) {
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index bea4a8349..0ceca6df2 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -36,7 +36,7 @@ class QUrl;
 class QWidget;
 QT_END_NAMESPACE
 
-/** Utility functions used by the Bitcoin Qt UI.
+/** Utility functions used by the QuasarAppcoin Qt UI.
  */
 namespace GUIUtil
 {
@@ -50,7 +50,7 @@ namespace GUIUtil
     // Set up widget for address
     void setupAddressWidget(QValidatedLineEdit *widget, QWidget *parent);
 
-    // Parse "bitcoin:" URI into recipient object, return true on successful parsing
+    // Parse "quasarappcoin:" URI into recipient object, return true on successful parsing
     bool parseBitcoinURI(const QUrl &uri, SendCoinsRecipient *out);
     bool parseBitcoinURI(QString uri, SendCoinsRecipient *out);
     QString formatBitcoinURI(const SendCoinsRecipient &info);
diff --git a/src/qt/intro.cpp b/src/qt/intro.cpp
index c59536193..0ef1d2074 100644
--- a/src/qt/intro.cpp
+++ b/src/qt/intro.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -126,7 +126,7 @@ Intro::Intro(QWidget *parent, uint64_t blockchain_size, uint64_t chain_state_siz
         .arg(tr(PACKAGE_NAME))
         .arg(m_blockchain_size)
         .arg(2009)
-        .arg(tr("Bitcoin"))
+        .arg(tr("QuasarAppcoin"))
     );
     ui->lblExplanation2->setText(ui->lblExplanation2->text().arg(tr(PACKAGE_NAME)));
 
@@ -145,7 +145,7 @@ Intro::Intro(QWidget *parent, uint64_t blockchain_size, uint64_t chain_state_siz
     }
     requiredSpace += m_chain_state_size;
     ui->sizeWarningLabel->setText(
-        tr("%1 will download and store a copy of the Bitcoin block chain.").arg(tr(PACKAGE_NAME)) + " " +
+        tr("%1 will download and store a copy of the QuasarAppcoin block chain.").arg(tr(PACKAGE_NAME)) + " " +
         storageRequiresMsg.arg(requiredSpace) + " " +
         tr("The wallet will also be stored in this directory.")
     );
@@ -204,7 +204,7 @@ bool Intro::pickDataDirectory(interfaces::Node& node)
         /* If current default data directory does not exist, let the user choose one */
         Intro intro(0, node.getAssumedBlockchainSize(), node.getAssumedChainStateSize());
         intro.setDataDirectory(dataDir);
-        intro.setWindowIcon(QIcon(":icons/bitcoin"));
+        intro.setWindowIcon(QIcon(":icons/quasarappcoin"));
 
         while(true)
         {
@@ -231,7 +231,7 @@ bool Intro::pickDataDirectory(interfaces::Node& node)
         settings.setValue("fReset", false);
     }
     /* Only override -datadir if different from the default, to make it possible to
-     * override -datadir in the bitcoin.conf file in the default data directory
+     * override -datadir in the quasarappcoin.conf file in the default data directory
      * (to be consistent with bitcoind behavior)
      */
     if(dataDir != GUIUtil::getDefaultDataDirectory()) {
diff --git a/src/qt/intro.h b/src/qt/intro.h
index c3b26808d..2d1608af4 100644
--- a/src/qt/intro.h
+++ b/src/qt/intro.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/macdockiconhandler.h b/src/qt/macdockiconhandler.h
index ff867e21a..4ec962812 100644
--- a/src/qt/macdockiconhandler.h
+++ b/src/qt/macdockiconhandler.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/macnotificationhandler.h b/src/qt/macnotificationhandler.h
index 03c744c12..1a7ac8fab 100644
--- a/src/qt/macnotificationhandler.h
+++ b/src/qt/macnotificationhandler.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/macos_appnap.h b/src/qt/macos_appnap.h
index 8c2cd840b..801ed484b 100644
--- a/src/qt/macos_appnap.h
+++ b/src/qt/macos_appnap.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/main.cpp b/src/qt/main.cpp
index 6a3c2249d..1eb6c3a7f 100644
--- a/src/qt/main.cpp
+++ b/src/qt/main.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -11,7 +11,7 @@
 
 /** Translate string to current locale using Qt. */
 extern const std::function<std::string(const char*)> G_TRANSLATION_FUN = [](const char* psz) {
-    return QCoreApplication::translate("bitcoin-core", psz).toStdString();
+    return QCoreApplication::translate("quasarappcoin-core", psz).toStdString();
 };
 
 int main(int argc, char* argv[]) { return GuiMain(argc, argv); }
diff --git a/src/qt/modaloverlay.cpp b/src/qt/modaloverlay.cpp
index 8ecc33da8..bd66e85eb 100644
--- a/src/qt/modaloverlay.cpp
+++ b/src/qt/modaloverlay.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/modaloverlay.h b/src/qt/modaloverlay.h
index cf8b53f2b..3577ceba1 100644
--- a/src/qt/modaloverlay.h
+++ b/src/qt/modaloverlay.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/networkstyle.cpp b/src/qt/networkstyle.cpp
index f0c860e66..59f0567a1 100644
--- a/src/qt/networkstyle.cpp
+++ b/src/qt/networkstyle.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -27,7 +27,7 @@ NetworkStyle::NetworkStyle(const QString &_appName, const int iconColorHueShift,
     titleAddText(qApp->translate("SplashScreen", _titleAddText))
 {
     // load pixmap
-    QPixmap pixmap(":/icons/bitcoin");
+    QPixmap pixmap(":/icons/quasarappcoin");
 
     if(iconColorHueShift != 0 && iconColorSaturationReduction != 0)
     {
diff --git a/src/qt/networkstyle.h b/src/qt/networkstyle.h
index b78a9f594..5a815c4f9 100644
--- a/src/qt/networkstyle.h
+++ b/src/qt/networkstyle.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014 The Bitcoin Core developers
+// Copyright (c) 2014 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/notificator.cpp b/src/qt/notificator.cpp
index 4b91c1976..c75313d88 100644
--- a/src/qt/notificator.cpp
+++ b/src/qt/notificator.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/notificator.h b/src/qt/notificator.h
index 7d80b43e4..f72878d11 100644
--- a/src/qt/notificator.h
+++ b/src/qt/notificator.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/openuridialog.cpp b/src/qt/openuridialog.cpp
index 48db95679..6e236c066 100644
--- a/src/qt/openuridialog.cpp
+++ b/src/qt/openuridialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -15,7 +15,7 @@ OpenURIDialog::OpenURIDialog(QWidget *parent) :
     ui(new Ui::OpenURIDialog)
 {
     ui->setupUi(this);
-    ui->uriEdit->setPlaceholderText("bitcoin:");
+    ui->uriEdit->setPlaceholderText("quasarappcoin:");
 }
 
 OpenURIDialog::~OpenURIDialog()
@@ -46,5 +46,5 @@ void OpenURIDialog::on_selectFileButton_clicked()
     if(filename.isEmpty())
         return;
     QUrl fileUri = QUrl::fromLocalFile(filename);
-    ui->uriEdit->setText("bitcoin:?r=" + QUrl::toPercentEncoding(fileUri.toString()));
+    ui->uriEdit->setText("quasarappcoin:?r=" + QUrl::toPercentEncoding(fileUri.toString()));
 }
diff --git a/src/qt/openuridialog.h b/src/qt/openuridialog.h
index e94593d5b..72b94dd5e 100644
--- a/src/qt/openuridialog.h
+++ b/src/qt/openuridialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2015 The Bitcoin Core developers
+// Copyright (c) 2011-2015 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/optionsdialog.cpp b/src/qt/optionsdialog.cpp
index 40dc7bf40..65ab8cb6f 100644
--- a/src/qt/optionsdialog.cpp
+++ b/src/qt/optionsdialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/optionsdialog.h b/src/qt/optionsdialog.h
index 9bc1c8ae4..19c28ea95 100644
--- a/src/qt/optionsdialog.h
+++ b/src/qt/optionsdialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/optionsmodel.cpp b/src/qt/optionsmodel.cpp
index 5b4fb4cc1..0029caaf2 100644
--- a/src/qt/optionsmodel.cpp
+++ b/src/qt/optionsmodel.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -511,7 +511,7 @@ void OptionsModel::checkAndMigrate()
     if (settingsVersion < CLIENT_VERSION)
     {
         // -dbcache was bumped from 100 to 300 in 0.13
-        // see https://github.com/bitcoin/bitcoin/pull/8273
+        // see https://github.com/quasarappcoin/quasarappcoin/pull/8273
         // force people to upgrade to the new value if they are using 100MB
         if (settingsVersion < 130000 && settings.contains("nDatabaseCache") && settings.value("nDatabaseCache").toLongLong() == 100)
             settings.setValue("nDatabaseCache", (qint64)nDefaultDbCache);
diff --git a/src/qt/optionsmodel.h b/src/qt/optionsmodel.h
index 1af3a72b9..fe5ed6e7d 100644
--- a/src/qt/optionsmodel.h
+++ b/src/qt/optionsmodel.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -20,7 +20,7 @@ QT_END_NAMESPACE
 extern const char *DEFAULT_GUI_PROXY_HOST;
 static constexpr unsigned short DEFAULT_GUI_PROXY_PORT = 9050;
 
-/** Interface from Qt to configuration data structure for Bitcoin client.
+/** Interface from Qt to configuration data structure for QuasarAppcoin client.
    To Qt, the options are presented as a list with the different options
    laid out vertically.
    This can be changed to a tree once the settings become sufficiently
diff --git a/src/qt/overviewpage.cpp b/src/qt/overviewpage.cpp
index d8e48f350..0e4ecbaf1 100644
--- a/src/qt/overviewpage.cpp
+++ b/src/qt/overviewpage.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/overviewpage.h b/src/qt/overviewpage.h
index 00ba7ad4c..9e01cc821 100644
--- a/src/qt/overviewpage.h
+++ b/src/qt/overviewpage.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/paymentrequestplus.cpp b/src/qt/paymentrequestplus.cpp
index b962ab1ef..046dcb643 100644
--- a/src/qt/paymentrequestplus.cpp
+++ b/src/qt/paymentrequestplus.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/paymentrequestplus.h b/src/qt/paymentrequestplus.h
index 301462880..277ac889a 100644
--- a/src/qt/paymentrequestplus.h
+++ b/src/qt/paymentrequestplus.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index 43dccec4e..f6f9cc99d 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -48,15 +48,15 @@
 #include <QUrlQuery>
 
 const int BITCOIN_IPC_CONNECT_TIMEOUT = 1000; // milliseconds
-const QString BITCOIN_IPC_PREFIX("bitcoin:");
+const QString BITCOIN_IPC_PREFIX("quasarappcoin:");
 #ifdef ENABLE_BIP70
 // BIP70 payment protocol messages
 const char* BIP70_MESSAGE_PAYMENTACK = "PaymentACK";
 const char* BIP70_MESSAGE_PAYMENTREQUEST = "PaymentRequest";
 // BIP71 payment protocol media types
-const char* BIP71_MIMETYPE_PAYMENT = "application/bitcoin-payment";
-const char* BIP71_MIMETYPE_PAYMENTACK = "application/bitcoin-paymentack";
-const char* BIP71_MIMETYPE_PAYMENTREQUEST = "application/bitcoin-paymentrequest";
+const char* BIP71_MIMETYPE_PAYMENT = "application/quasarappcoin-payment";
+const char* BIP71_MIMETYPE_PAYMENTACK = "application/quasarappcoin-paymentack";
+const char* BIP71_MIMETYPE_PAYMENTREQUEST = "application/quasarappcoin-paymentrequest";
 #endif
 
 //
@@ -101,11 +101,11 @@ void PaymentServer::ipcParseCommandLine(interfaces::Node& node, int argc, char*
         if (arg.startsWith("-"))
             continue;
 
-        // If the bitcoin: URI contains a payment request, we are not able to detect the
+        // If the quasarappcoin: URI contains a payment request, we are not able to detect the
         // network as that would require fetching and parsing the payment request.
         // That means clicking such an URI which contains a testnet payment request
         // will start a mainnet instance and throw a "wrong network" error.
-        if (arg.startsWith(BITCOIN_IPC_PREFIX, Qt::CaseInsensitive)) // bitcoin: URI
+        if (arg.startsWith(BITCOIN_IPC_PREFIX, Qt::CaseInsensitive)) // quasarappcoin: URI
         {
             savedPaymentRequests.append(arg);
 
@@ -207,7 +207,7 @@ PaymentServer::PaymentServer(QObject* parent, bool startLocalServer) :
 #endif
 
     // Install global event filter to catch QFileOpenEvents
-    // on Mac: sent when you click bitcoin: links
+    // on Mac: sent when you click quasarappcoin: links
     // other OSes: helpful when dealing with payment request files
     if (parent)
         parent->installEventFilter(this);
@@ -224,7 +224,7 @@ PaymentServer::PaymentServer(QObject* parent, bool startLocalServer) :
         if (!uriServer->listen(name)) {
             // constructor is called early in init, so don't use "Q_EMIT message()" here
             QMessageBox::critical(nullptr, tr("Payment request error"),
-                tr("Cannot start bitcoin: click-to-pay handler"));
+                tr("Cannot start quasarappcoin: click-to-pay handler"));
         }
         else {
             connect(uriServer, &QLocalServer::newConnection, this, &PaymentServer::handleURIConnection);
@@ -243,7 +243,7 @@ PaymentServer::~PaymentServer()
 }
 
 //
-// OSX-specific way of handling bitcoin: URIs and PaymentRequest mime types.
+// OSX-specific way of handling quasarappcoin: URIs and PaymentRequest mime types.
 // Also used by paymentservertests.cpp and when opening a payment request file
 // via "Open URI..." menu entry.
 //
@@ -284,12 +284,12 @@ void PaymentServer::handleURIOrFile(const QString& s)
         return;
     }
 
-    if (s.startsWith("bitcoin://", Qt::CaseInsensitive))
+    if (s.startsWith("quasarappcoin://", Qt::CaseInsensitive))
     {
-        Q_EMIT message(tr("URI handling"), tr("'bitcoin://' is not a valid URI. Use 'bitcoin:' instead."),
+        Q_EMIT message(tr("URI handling"), tr("'quasarappcoin://' is not a valid URI. Use 'quasarappcoin:' instead."),
             CClientUIInterface::MSG_ERROR);
     }
-    else if (s.startsWith(BITCOIN_IPC_PREFIX, Qt::CaseInsensitive)) // bitcoin: URI
+    else if (s.startsWith(BITCOIN_IPC_PREFIX, Qt::CaseInsensitive)) // quasarappcoin: URI
     {
         QUrlQuery uri((QUrl(s)));
 #ifdef ENABLE_BIP70
@@ -340,7 +340,7 @@ void PaymentServer::handleURIOrFile(const QString& s)
             }
             else
                 Q_EMIT message(tr("URI handling"),
-                    tr("URI cannot be parsed! This can be caused by an invalid Bitcoin address or malformed URI parameters."),
+                    tr("URI cannot be parsed! This can be caused by an invalid QuasarAppcoin address or malformed URI parameters."),
                     CClientUIInterface::ICON_WARNING);
 
             return;
@@ -506,7 +506,7 @@ void PaymentServer::initNetManager()
         return;
     delete netManager;
 
-    // netManager is used to fetch paymentrequests given in bitcoin: URIs
+    // netManager is used to fetch paymentrequests given in quasarappcoin: URIs
     netManager = new QNetworkAccessManager(this);
 
     QNetworkProxy proxy;
@@ -591,7 +591,7 @@ bool PaymentServer::processPaymentRequest(const PaymentRequestPlus& request, Sen
             addresses.append(QString::fromStdString(EncodeDestination(dest)));
         }
         else if (!recipient.authenticatedMerchant.isEmpty()) {
-            // Unauthenticated payment requests to custom bitcoin addresses are not supported
+            // Unauthenticated payment requests to custom quasarappcoin addresses are not supported
             // (there is no good way to tell the user where they are paying in a way they'd
             // have a chance of understanding).
             Q_EMIT message(tr("Payment request rejected"),
@@ -600,7 +600,7 @@ bool PaymentServer::processPaymentRequest(const PaymentRequestPlus& request, Sen
             return false;
         }
 
-        // Bitcoin amounts are stored as (optional) uint64 in the protobuf messages (see paymentrequest.proto),
+        // QuasarAppcoin amounts are stored as (optional) uint64 in the protobuf messages (see paymentrequest.proto),
         // but CAmount is defined as int64_t. Because of that we need to verify that amounts are in a valid range
         // and no overflow has happened.
         if (!verifyAmount(sendingTo.second)) {
diff --git a/src/qt/paymentserver.h b/src/qt/paymentserver.h
index 30b5bc3b6..354fda31e 100644
--- a/src/qt/paymentserver.h
+++ b/src/qt/paymentserver.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -6,7 +6,7 @@
 #define BITCOIN_QT_PAYMENTSERVER_H
 
 // This class handles payment requests from clicking on
-// bitcoin: URIs
+// quasarappcoin: URIs
 //
 // This is somewhat tricky, because we have to deal with
 // the situation where the user clicks on a link during
diff --git a/src/qt/peertablemodel.cpp b/src/qt/peertablemodel.cpp
index 496aeebf7..44ffa1543 100644
--- a/src/qt/peertablemodel.cpp
+++ b/src/qt/peertablemodel.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/peertablemodel.h b/src/qt/peertablemodel.h
index b3f5dd7db..d9f765a33 100644
--- a/src/qt/peertablemodel.h
+++ b/src/qt/peertablemodel.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/platformstyle.cpp b/src/qt/platformstyle.cpp
index d537d759d..45916339f 100644
--- a/src/qt/platformstyle.cpp
+++ b/src/qt/platformstyle.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/platformstyle.h b/src/qt/platformstyle.h
index 4e763e760..ce4546ea4 100644
--- a/src/qt/platformstyle.h
+++ b/src/qt/platformstyle.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015 The Bitcoin Core developers
+// Copyright (c) 2015 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/qvalidatedlineedit.cpp b/src/qt/qvalidatedlineedit.cpp
index aa936d6b7..243287806 100644
--- a/src/qt/qvalidatedlineedit.cpp
+++ b/src/qt/qvalidatedlineedit.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/qvalidatedlineedit.h b/src/qt/qvalidatedlineedit.h
index 815d5e004..7472c6bde 100644
--- a/src/qt/qvalidatedlineedit.h
+++ b/src/qt/qvalidatedlineedit.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/qvaluecombobox.cpp b/src/qt/qvaluecombobox.cpp
index 76f94ecf8..fec8f25b7 100644
--- a/src/qt/qvaluecombobox.cpp
+++ b/src/qt/qvaluecombobox.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/qvaluecombobox.h b/src/qt/qvaluecombobox.h
index 8892071fb..ac9fa987c 100644
--- a/src/qt/qvaluecombobox.h
+++ b/src/qt/qvaluecombobox.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2015 The Bitcoin Core developers
+// Copyright (c) 2011-2015 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/receivecoinsdialog.cpp b/src/qt/receivecoinsdialog.cpp
index fc58090dc..1c9b36f16 100644
--- a/src/qt/receivecoinsdialog.cpp
+++ b/src/qt/receivecoinsdialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/receivecoinsdialog.h b/src/qt/receivecoinsdialog.h
index 5bca2f46e..914427e74 100644
--- a/src/qt/receivecoinsdialog.h
+++ b/src/qt/receivecoinsdialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/receiverequestdialog.cpp b/src/qt/receiverequestdialog.cpp
index f5b30cf6d..1f80346fd 100644
--- a/src/qt/receiverequestdialog.cpp
+++ b/src/qt/receiverequestdialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/receiverequestdialog.h b/src/qt/receiverequestdialog.h
index dd28fd73c..f9f732fdf 100644
--- a/src/qt/receiverequestdialog.h
+++ b/src/qt/receiverequestdialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/recentrequeststablemodel.cpp b/src/qt/recentrequeststablemodel.cpp
index aa746017f..09c1c1c33 100644
--- a/src/qt/recentrequeststablemodel.cpp
+++ b/src/qt/recentrequeststablemodel.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/recentrequeststablemodel.h b/src/qt/recentrequeststablemodel.h
index 8a1140e95..d906e5b05 100644
--- a/src/qt/recentrequeststablemodel.h
+++ b/src/qt/recentrequeststablemodel.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -50,7 +50,7 @@ private:
     Qt::SortOrder order;
 };
 
-/** Model for list of recently generated payment requests / bitcoin: URIs.
+/** Model for list of recently generated payment requests / quasarappcoin: URIs.
  * Part of wallet model.
  */
 class RecentRequestsTableModel: public QAbstractTableModel
diff --git a/src/qt/rpcconsole.cpp b/src/qt/rpcconsole.cpp
index 8b6dcf044..6d49c01ba 100644
--- a/src/qt/rpcconsole.cpp
+++ b/src/qt/rpcconsole.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/rpcconsole.h b/src/qt/rpcconsole.h
index 79b0f3b19..49fce269a 100644
--- a/src/qt/rpcconsole.h
+++ b/src/qt/rpcconsole.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -32,7 +32,7 @@ class QMenu;
 class QItemSelection;
 QT_END_NAMESPACE
 
-/** Local Bitcoin RPC console. */
+/** Local QuasarAppcoin RPC console. */
 class RPCConsole: public QWidget
 {
     Q_OBJECT
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index 8a0b26583..aa30c73fe 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -802,7 +802,7 @@ void SendCoinsDialog::coinControlChangeEdited(const QString& text)
         }
         else if (!IsValidDestination(dest)) // Invalid address
         {
-            ui->labelCoinControlChangeLabel->setText(tr("Warning: Invalid Bitcoin address"));
+            ui->labelCoinControlChangeLabel->setText(tr("Warning: Invalid QuasarAppcoin address"));
         }
         else // Valid address
         {
diff --git a/src/qt/sendcoinsdialog.h b/src/qt/sendcoinsdialog.h
index 337a72b87..710a39356 100644
--- a/src/qt/sendcoinsdialog.h
+++ b/src/qt/sendcoinsdialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/sendcoinsentry.cpp b/src/qt/sendcoinsentry.cpp
index 7324d759f..593402951 100644
--- a/src/qt/sendcoinsentry.cpp
+++ b/src/qt/sendcoinsentry.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -38,9 +38,9 @@ SendCoinsEntry::SendCoinsEntry(const PlatformStyle *_platformStyle, QWidget *par
         ui->payToLayout->setSpacing(4);
     ui->addAsLabel->setPlaceholderText(tr("Enter a label for this address to add it to your address book"));
 
-    // normal bitcoin address field
+    // normal quasarappcoin address field
     GUIUtil::setupAddressWidget(ui->payTo, this);
-    // just a label for displaying bitcoin address(es)
+    // just a label for displaying quasarappcoin address(es)
     ui->payTo_is->setFont(GUIUtil::fixedPitchFont());
 
     // Connect signals
diff --git a/src/qt/sendcoinsentry.h b/src/qt/sendcoinsentry.h
index 42e221713..a9092563d 100644
--- a/src/qt/sendcoinsentry.h
+++ b/src/qt/sendcoinsentry.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/signverifymessagedialog.cpp b/src/qt/signverifymessagedialog.cpp
index 64cc85d62..be69c8eaa 100644
--- a/src/qt/signverifymessagedialog.cpp
+++ b/src/qt/signverifymessagedialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/signverifymessagedialog.h b/src/qt/signverifymessagedialog.h
index d2e04cd4f..d613cbea8 100644
--- a/src/qt/signverifymessagedialog.h
+++ b/src/qt/signverifymessagedialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2015 The Bitcoin Core developers
+// Copyright (c) 2011-2015 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/splashscreen.cpp b/src/qt/splashscreen.cpp
index 0126a2920..fc1c635bd 100644
--- a/src/qt/splashscreen.cpp
+++ b/src/qt/splashscreen.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -63,7 +63,7 @@ SplashScreen::SplashScreen(interfaces::Node& node, Qt::WindowFlags f, const Netw
     QRect rGradient(QPoint(0,0), splashSize);
     pixPaint.fillRect(rGradient, gradient);
 
-    // draw the bitcoin icon, expected size of PNG: 1024x1024
+    // draw the quasarappcoin icon, expected size of PNG: 1024x1024
     QRect rectIcon(QPoint(-150,-122), QSize(430,430));
 
     const QSize requiredSize(1024,1024);
diff --git a/src/qt/splashscreen.h b/src/qt/splashscreen.h
index f99dd0c70..5a5d03498 100644
--- a/src/qt/splashscreen.h
+++ b/src/qt/splashscreen.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -19,7 +19,7 @@ class Wallet;
 
 /** Class for the splashscreen with information of the running client.
  *
- * @note this is intentionally not a QSplashScreen. Bitcoin Core initialization
+ * @note this is intentionally not a QSplashScreen. QuasarAppcoin Core initialization
  * can take a long time, and in that case a progress window that cannot be
  * moved around and minimized has turned out to be frustrating to the user.
  */
diff --git a/src/qt/test/apptests.cpp b/src/qt/test/apptests.cpp
index da25d8317..bd3347c49 100644
--- a/src/qt/test/apptests.cpp
+++ b/src/qt/test/apptests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/test/apptests.h b/src/qt/test/apptests.h
index 83bf56f1e..b46e5ef51 100644
--- a/src/qt/test/apptests.h
+++ b/src/qt/test/apptests.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -37,7 +37,7 @@ private:
         ~HandleCallback();
     };
 
-    //! Bitcoin application.
+    //! QuasarAppcoin application.
     BitcoinApplication& m_app;
 
     //! Set of pending callback names. Used to track expected callbacks and shut
diff --git a/src/qt/test/compattests.cpp b/src/qt/test/compattests.cpp
index 6750c543d..745219cfa 100644
--- a/src/qt/test/compattests.cpp
+++ b/src/qt/test/compattests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -16,7 +16,7 @@
 
 void CompatTests::bswapTests()
 {
-	// Sibling in bitcoin/src/test/bswap_tests.cpp
+	// Sibling in quasarappcoin/src/test/bswap_tests.cpp
 	uint16_t u1 = 0x1234;
 	uint32_t u2 = 0x56789abc;
 	uint64_t u3 = 0xdef0123456789abc;
diff --git a/src/qt/test/compattests.h b/src/qt/test/compattests.h
index 1af97696b..59a37ea86 100644
--- a/src/qt/test/compattests.h
+++ b/src/qt/test/compattests.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2016 The Bitcoin Core developers
+// Copyright (c) 2009-2016 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/test/paymentrequestdata.h b/src/qt/test/paymentrequestdata.h
index 7f45d3097..d7080c834 100644
--- a/src/qt/test/paymentrequestdata.h
+++ b/src/qt/test/paymentrequestdata.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/test/paymentservertests.cpp b/src/qt/test/paymentservertests.cpp
index f0eca899f..041e44db5 100644
--- a/src/qt/test/paymentservertests.cpp
+++ b/src/qt/test/paymentservertests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/test/paymentservertests.h b/src/qt/test/paymentservertests.h
index 7ef7a0a64..551ace1cb 100644
--- a/src/qt/test/paymentservertests.h
+++ b/src/qt/test/paymentservertests.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/test/rpcnestedtests.cpp b/src/qt/test/rpcnestedtests.cpp
index b0bd89b29..8d6d1ef32 100644
--- a/src/qt/test/rpcnestedtests.cpp
+++ b/src/qt/test/rpcnestedtests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/test/rpcnestedtests.h b/src/qt/test/rpcnestedtests.h
index e33f4e3da..fc4351348 100644
--- a/src/qt/test/rpcnestedtests.h
+++ b/src/qt/test/rpcnestedtests.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/test/test_main.cpp b/src/qt/test/test_main.cpp
index a2bf53973..9e8c13b76 100644
--- a/src/qt/test/test_main.cpp
+++ b/src/qt/test/test_main.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -72,7 +72,7 @@ int main(int argc, char *argv[])
     // Don't remove this, it's needed to access
     // QApplication:: and QCoreApplication:: in the tests
     BitcoinApplication app(*node, argc, argv);
-    app.setApplicationName("Bitcoin-Qt-test");
+    app.setApplicationName("QuasarAppcoin-Qt-test");
 
     SSL_library_init();
 
diff --git a/src/qt/test/uritests.cpp b/src/qt/test/uritests.cpp
index b87d3b21c..abc5f73f6 100644
--- a/src/qt/test/uritests.cpp
+++ b/src/qt/test/uritests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -13,54 +13,54 @@ void URITests::uriTests()
 {
     SendCoinsRecipient rv;
     QUrl uri;
-    uri.setUrl(QString("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?req-dontexist="));
+    uri.setUrl(QString("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?req-dontexist="));
     QVERIFY(!GUIUtil::parseBitcoinURI(uri, &rv));
 
-    uri.setUrl(QString("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?dontexist="));
+    uri.setUrl(QString("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?dontexist="));
     QVERIFY(GUIUtil::parseBitcoinURI(uri, &rv));
     QVERIFY(rv.address == QString("175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W"));
     QVERIFY(rv.label == QString());
     QVERIFY(rv.amount == 0);
 
-    uri.setUrl(QString("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?label=Wikipedia Example Address"));
+    uri.setUrl(QString("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?label=Wikipedia Example Address"));
     QVERIFY(GUIUtil::parseBitcoinURI(uri, &rv));
     QVERIFY(rv.address == QString("175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W"));
     QVERIFY(rv.label == QString("Wikipedia Example Address"));
     QVERIFY(rv.amount == 0);
 
-    uri.setUrl(QString("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?amount=0.001"));
+    uri.setUrl(QString("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?amount=0.001"));
     QVERIFY(GUIUtil::parseBitcoinURI(uri, &rv));
     QVERIFY(rv.address == QString("175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W"));
     QVERIFY(rv.label == QString());
     QVERIFY(rv.amount == 100000);
 
-    uri.setUrl(QString("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?amount=1.001"));
+    uri.setUrl(QString("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?amount=1.001"));
     QVERIFY(GUIUtil::parseBitcoinURI(uri, &rv));
     QVERIFY(rv.address == QString("175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W"));
     QVERIFY(rv.label == QString());
     QVERIFY(rv.amount == 100100000);
 
-    uri.setUrl(QString("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?amount=100&label=Wikipedia Example"));
+    uri.setUrl(QString("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?amount=100&label=Wikipedia Example"));
     QVERIFY(GUIUtil::parseBitcoinURI(uri, &rv));
     QVERIFY(rv.address == QString("175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W"));
     QVERIFY(rv.amount == 10000000000LL);
     QVERIFY(rv.label == QString("Wikipedia Example"));
 
-    uri.setUrl(QString("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?message=Wikipedia Example Address"));
+    uri.setUrl(QString("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?message=Wikipedia Example Address"));
     QVERIFY(GUIUtil::parseBitcoinURI(uri, &rv));
     QVERIFY(rv.address == QString("175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W"));
     QVERIFY(rv.label == QString());
 
-    QVERIFY(GUIUtil::parseBitcoinURI("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?message=Wikipedia Example Address", &rv));
+    QVERIFY(GUIUtil::parseBitcoinURI("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?message=Wikipedia Example Address", &rv));
     QVERIFY(rv.address == QString("175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W"));
     QVERIFY(rv.label == QString());
 
-    uri.setUrl(QString("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?req-message=Wikipedia Example Address"));
+    uri.setUrl(QString("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?req-message=Wikipedia Example Address"));
     QVERIFY(GUIUtil::parseBitcoinURI(uri, &rv));
 
-    uri.setUrl(QString("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?amount=1,000&label=Wikipedia Example"));
+    uri.setUrl(QString("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?amount=1,000&label=Wikipedia Example"));
     QVERIFY(!GUIUtil::parseBitcoinURI(uri, &rv));
 
-    uri.setUrl(QString("bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?amount=1,000.0&label=Wikipedia Example"));
+    uri.setUrl(QString("quasarappcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?amount=1,000.0&label=Wikipedia Example"));
     QVERIFY(!GUIUtil::parseBitcoinURI(uri, &rv));
 }
diff --git a/src/qt/test/uritests.h b/src/qt/test/uritests.h
index 499484279..4d1808426 100644
--- a/src/qt/test/uritests.h
+++ b/src/qt/test/uritests.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2015 The Bitcoin Core developers
+// Copyright (c) 2009-2015 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/test/wallettests.cpp b/src/qt/test/wallettests.cpp
index 9e3518fd5..e86267c48 100644
--- a/src/qt/test/wallettests.cpp
+++ b/src/qt/test/wallettests.cpp
@@ -217,7 +217,7 @@ void TestGUI()
             QString paymentText = rlist->toPlainText();
             QStringList paymentTextList = paymentText.split('\n');
             QCOMPARE(paymentTextList.at(0), QString("Payment information"));
-            QVERIFY(paymentTextList.at(1).indexOf(QString("URI: bitcoin:")) != -1);
+            QVERIFY(paymentTextList.at(1).indexOf(QString("URI: quasarappcoin:")) != -1);
             QVERIFY(paymentTextList.at(2).indexOf(QString("Address:")) != -1);
             QCOMPARE(paymentTextList.at(3), QString("Amount: 0.00000001 ") + QString::fromStdString(CURRENCY_UNIT));
             QCOMPARE(paymentTextList.at(4), QString("Label: TEST_LABEL_1"));
diff --git a/src/qt/trafficgraphwidget.cpp b/src/qt/trafficgraphwidget.cpp
index 1588be8da..268567ccd 100644
--- a/src/qt/trafficgraphwidget.cpp
+++ b/src/qt/trafficgraphwidget.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/trafficgraphwidget.h b/src/qt/trafficgraphwidget.h
index 48bd246b3..d49c86d84 100644
--- a/src/qt/trafficgraphwidget.h
+++ b/src/qt/trafficgraphwidget.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2015 The Bitcoin Core developers
+// Copyright (c) 2011-2015 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/transactiondesc.cpp b/src/qt/transactiondesc.cpp
index 0d070d9e8..3f7b3e400 100644
--- a/src/qt/transactiondesc.cpp
+++ b/src/qt/transactiondesc.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -255,7 +255,7 @@ QString TransactionDesc::toHTML(interfaces::Node& node, interfaces::Wallet& wall
     strHTML += "<b>" + tr("Transaction virtual size") + ":</b> " + QString::number(GetVirtualTransactionSize(*wtx.tx)) + " bytes<br>";
     strHTML += "<b>" + tr("Output index") + ":</b> " + QString::number(rec->getOutputIndex()) + "<br>";
 
-    // Message from normal bitcoin:URI (bitcoin:123...?message=example)
+    // Message from normal quasarappcoin:URI (quasarappcoin:123...?message=example)
     for (const std::pair<std::string, std::string>& r : orderForm)
         if (r.first == "Message")
             strHTML += "<br><b>" + tr("Message") + ":</b><br>" + GUIUtil::HtmlEscape(r.second, true) + "<br>";
diff --git a/src/qt/transactiondesc.h b/src/qt/transactiondesc.h
index cf955a433..337a557e3 100644
--- a/src/qt/transactiondesc.h
+++ b/src/qt/transactiondesc.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/transactiondescdialog.cpp b/src/qt/transactiondescdialog.cpp
index ca72720e0..0d178a77b 100644
--- a/src/qt/transactiondescdialog.cpp
+++ b/src/qt/transactiondescdialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/transactiondescdialog.h b/src/qt/transactiondescdialog.h
index 8fd3f3166..ae241fe1f 100644
--- a/src/qt/transactiondescdialog.h
+++ b/src/qt/transactiondescdialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2014 The Bitcoin Core developers
+// Copyright (c) 2011-2014 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/transactionfilterproxy.cpp b/src/qt/transactionfilterproxy.cpp
index a631f497a..920fa376e 100644
--- a/src/qt/transactionfilterproxy.cpp
+++ b/src/qt/transactionfilterproxy.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/transactionfilterproxy.h b/src/qt/transactionfilterproxy.h
index 685f8d3a2..cf19738c8 100644
--- a/src/qt/transactionfilterproxy.h
+++ b/src/qt/transactionfilterproxy.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/transactionrecord.cpp b/src/qt/transactionrecord.cpp
index aa785553c..3d025d85e 100644
--- a/src/qt/transactionrecord.cpp
+++ b/src/qt/transactionrecord.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -55,7 +55,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const interface
                 sub.involvesWatchAddress = mine & ISMINE_WATCH_ONLY;
                 if (wtx.txout_address_is_mine[i])
                 {
-                    // Received by Bitcoin Address
+                    // Received by QuasarAppcoin Address
                     sub.type = TransactionRecord::RecvWithAddress;
                     sub.address = EncodeDestination(wtx.txout_address[i]);
                 }
@@ -124,7 +124,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const interface
 
                 if (!boost::get<CNoDestination>(&wtx.txout_address[nOut]))
                 {
-                    // Sent to Bitcoin Address
+                    // Sent to QuasarAppcoin Address
                     sub.type = TransactionRecord::SendToAddress;
                     sub.address = EncodeDestination(wtx.txout_address[nOut]);
                 }
diff --git a/src/qt/transactionrecord.h b/src/qt/transactionrecord.h
index 3f64cefd0..8406bc95e 100644
--- a/src/qt/transactionrecord.h
+++ b/src/qt/transactionrecord.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/transactiontablemodel.cpp b/src/qt/transactiontablemodel.cpp
index 631a9b891..15c3a82a2 100644
--- a/src/qt/transactiontablemodel.cpp
+++ b/src/qt/transactiontablemodel.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/transactiontablemodel.h b/src/qt/transactiontablemodel.h
index 7a7d98962..b74f021da 100644
--- a/src/qt/transactiontablemodel.h
+++ b/src/qt/transactiontablemodel.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/transactionview.cpp b/src/qt/transactionview.cpp
index 762ec434a..6defb21aa 100644
--- a/src/qt/transactionview.cpp
+++ b/src/qt/transactionview.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/transactionview.h b/src/qt/transactionview.h
index e07181d1c..947e2b7e8 100644
--- a/src/qt/transactionview.h
+++ b/src/qt/transactionview.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/utilitydialog.cpp b/src/qt/utilitydialog.cpp
index b051dd159..a18b8584f 100644
--- a/src/qt/utilitydialog.cpp
+++ b/src/qt/utilitydialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -73,7 +73,7 @@ HelpMessageDialog::HelpMessageDialog(interfaces::Node& node, QWidget *parent, bo
         ui->helpMessage->setVisible(false);
     } else {
         setWindowTitle(tr("Command-line options"));
-        QString header = "Usage:  bitcoin-qt [command-line options]                     \n";
+        QString header = "Usage:  quasarappcoin-qt [command-line options]                     \n";
         QTextCursor cursor(ui->helpMessage->document());
         cursor.insertText(version);
         cursor.insertBlock();
diff --git a/src/qt/utilitydialog.h b/src/qt/utilitydialog.h
index f1cedff28..13895e9f2 100644
--- a/src/qt/utilitydialog.h
+++ b/src/qt/utilitydialog.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/walletcontroller.cpp b/src/qt/walletcontroller.cpp
index 019bd6582..032243fef 100644
--- a/src/qt/walletcontroller.cpp
+++ b/src/qt/walletcontroller.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/walletcontroller.h b/src/qt/walletcontroller.h
index 19b3a8225..714526c71 100644
--- a/src/qt/walletcontroller.h
+++ b/src/qt/walletcontroller.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/walletframe.cpp b/src/qt/walletframe.cpp
index 94413547d..06e7aff4e 100644
--- a/src/qt/walletframe.cpp
+++ b/src/qt/walletframe.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/walletframe.h b/src/qt/walletframe.h
index 156653f47..37b8a8252 100644
--- a/src/qt/walletframe.h
+++ b/src/qt/walletframe.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp
index fd392b7cf..710b623c3 100644
--- a/src/qt/walletmodel.cpp
+++ b/src/qt/walletmodel.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -168,7 +168,7 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact
         }
         else
 #endif
-        {   // User-entered bitcoin address / amount:
+        {   // User-entered quasarappcoin address / amount:
             if(!validateAddress(rcp.address))
             {
                 return InvalidAddress;
@@ -254,7 +254,7 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &tran
             }
             else
 #endif
-            if (!rcp.message.isEmpty()) // Message from normal bitcoin:URI (bitcoin:123...?message=example)
+            if (!rcp.message.isEmpty()) // Message from normal quasarappcoin:URI (quasarappcoin:123...?message=example)
                 vOrderForm.emplace_back("Message", rcp.message.toStdString());
         }
 
diff --git a/src/qt/walletmodel.h b/src/qt/walletmodel.h
index b123befbb..92e47e8d9 100644
--- a/src/qt/walletmodel.h
+++ b/src/qt/walletmodel.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -121,7 +121,7 @@ public:
     }
 };
 
-/** Interface to Bitcoin wallet from Qt view code. */
+/** Interface to QuasarAppcoin wallet from Qt view code. */
 class WalletModel : public QObject
 {
     Q_OBJECT
diff --git a/src/qt/walletmodeltransaction.cpp b/src/qt/walletmodeltransaction.cpp
index 2694d6780..5f43a6715 100644
--- a/src/qt/walletmodeltransaction.cpp
+++ b/src/qt/walletmodeltransaction.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/walletmodeltransaction.h b/src/qt/walletmodeltransaction.h
index 289aee847..089558ca3 100644
--- a/src/qt/walletmodeltransaction.h
+++ b/src/qt/walletmodeltransaction.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/walletview.cpp b/src/qt/walletview.cpp
index 5f6f93d94..56ca60159 100644
--- a/src/qt/walletview.cpp
+++ b/src/qt/walletview.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/walletview.h b/src/qt/walletview.h
index e29c4c52f..7e05c6421 100644
--- a/src/qt/walletview.h
+++ b/src/qt/walletview.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -46,7 +46,7 @@ public:
     void setClientModel(ClientModel *clientModel);
     WalletModel *getWalletModel() { return walletModel; }
     /** Set the wallet model.
-        The wallet model represents a bitcoin wallet, and offers access to the list of transactions, address book and sending
+        The wallet model represents a quasarappcoin wallet, and offers access to the list of transactions, address book and sending
         functionality.
     */
     void setWalletModel(WalletModel *walletModel);
diff --git a/src/qt/winshutdownmonitor.cpp b/src/qt/winshutdownmonitor.cpp
index 08cae76ad..eaa7bf403 100644
--- a/src/qt/winshutdownmonitor.cpp
+++ b/src/qt/winshutdownmonitor.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/qt/winshutdownmonitor.h b/src/qt/winshutdownmonitor.h
index 8edb98c74..3d8fac698 100644
--- a/src/qt/winshutdownmonitor.h
+++ b/src/qt/winshutdownmonitor.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/random.cpp b/src/random.cpp
index 1aa78a903..5cea1647a 100644
--- a/src/random.cpp
+++ b/src/random.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/random.h b/src/random.h
index 1c035f87b..c346d2acf 100644
--- a/src/random.h
+++ b/src/random.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/rest.cpp b/src/rest.cpp
index baad3b2ce..2ccedcb53 100644
--- a/src/rest.cpp
+++ b/src/rest.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/reverselock.h b/src/reverselock.h
index 9d9cc9fd7..0843b5953 100644
--- a/src/reverselock.h
+++ b/src/reverselock.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2016 The Bitcoin Core developers
+// Copyright (c) 2015-2016 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index e3fab4471..2f0149e88 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -1100,8 +1100,8 @@ UniValue gettxout(const JSONRPCRequest& request)
             "     \"hex\" : \"hex\",        (string) \n"
             "     \"reqSigs\" : n,          (numeric) Number of required signatures\n"
             "     \"type\" : \"pubkeyhash\", (string) The type, eg pubkeyhash\n"
-            "     \"addresses\" : [          (array of string) array of bitcoin addresses\n"
-            "        \"address\"     (string) bitcoin address\n"
+            "     \"addresses\" : [          (array of string) array of quasarappcoin addresses\n"
+            "        \"address\"     (string) quasarappcoin address\n"
             "        ,...\n"
             "     ]\n"
             "  },\n"
diff --git a/src/rpc/blockchain.h b/src/rpc/blockchain.h
index 55d1de453..f49a5bd50 100644
--- a/src/rpc/blockchain.h
+++ b/src/rpc/blockchain.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/rpc/client.cpp b/src/rpc/client.cpp
index 4144a17bc..f879e00f0 100644
--- a/src/rpc/client.cpp
+++ b/src/rpc/client.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/rpc/client.h b/src/rpc/client.h
index b9fee5bbb..6f558968f 100644
--- a/src/rpc/client.h
+++ b/src/rpc/client.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index 4de738a75..6415932c9 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -151,7 +151,7 @@ static UniValue generatetoaddress(const JSONRPCRequest& request)
                 "\nMine blocks immediately to a specified address (before the RPC call returns)\n",
                 {
                     {"nblocks", RPCArg::Type::NUM, RPCArg::Optional::NO, "How many blocks are generated immediately."},
-                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The address to send the newly generated bitcoin to."},
+                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The address to send the newly generated quasarappcoin to."},
                     {"maxtries", RPCArg::Type::NUM, /* default */ "1000000", "How many iterations to try."},
                 },
                 RPCResult{
@@ -160,7 +160,7 @@ static UniValue generatetoaddress(const JSONRPCRequest& request)
                 RPCExamples{
             "\nGenerate 11 blocks to myaddress\n"
             + HelpExampleCli("generatetoaddress", "11 \"myaddress\"")
-            + "If you are running the bitcoin core wallet, you can get a new address to send the newly generated bitcoin to with:\n"
+            + "If you are running the quasarappcoin core wallet, you can get a new address to send the newly generated quasarappcoin to with:\n"
             + HelpExampleCli("getnewaddress", "")
                 },
             }.ToString());
@@ -297,10 +297,10 @@ static UniValue getblocktemplate(const JSONRPCRequest& request)
                 "\nIf the request parameters include a 'mode' key, that is used to explicitly select between the default 'template' request or a 'proposal'.\n"
                 "It returns data needed to construct a block to work on.\n"
                 "For full specification, see BIPs 22, 23, 9, and 145:\n"
-                "    https://github.com/bitcoin/bips/blob/master/bip-0022.mediawiki\n"
-                "    https://github.com/bitcoin/bips/blob/master/bip-0023.mediawiki\n"
-                "    https://github.com/bitcoin/bips/blob/master/bip-0009.mediawiki#getblocktemplate_changes\n"
-                "    https://github.com/bitcoin/bips/blob/master/bip-0145.mediawiki\n",
+                "    https://github.com/quasarappcoin/bips/blob/master/bip-0022.mediawiki\n"
+                "    https://github.com/quasarappcoin/bips/blob/master/bip-0023.mediawiki\n"
+                "    https://github.com/quasarappcoin/bips/blob/master/bip-0009.mediawiki#getblocktemplate_changes\n"
+                "    https://github.com/quasarappcoin/bips/blob/master/bip-0145.mediawiki\n",
                 {
                     {"template_request", RPCArg::Type::OBJ, RPCArg::Optional::NO, "A json object in the following spec",
                         {
@@ -700,7 +700,7 @@ static UniValue submitblock(const JSONRPCRequest& request)
         throw std::runtime_error(
             RPCHelpMan{"submitblock",
                 "\nAttempts to submit new block to network.\n"
-                "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.\n",
+                "See https://en.quasarappcoin.it/wiki/BIP_0022 for full specification.\n",
                 {
                     {"hexdata", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "the hex-encoded block data to submit"},
                     {"dummy", RPCArg::Type::STR, /* default */ "ignored", "dummy value, for compatibility with BIP22. This value is ignored."},
diff --git a/src/rpc/misc.cpp b/src/rpc/misc.cpp
index bfb559f0d..260df3de6 100644
--- a/src/rpc/misc.cpp
+++ b/src/rpc/misc.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -35,14 +35,14 @@ static UniValue validateaddress(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() != 1)
         throw std::runtime_error(
             RPCHelpMan{"validateaddress",
-                "\nReturn information about the given bitcoin address.\n",
+                "\nReturn information about the given quasarappcoin address.\n",
                 {
-                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address to validate"},
+                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The quasarappcoin address to validate"},
                 },
                 RPCResult{
             "{\n"
             "  \"isvalid\" : true|false,       (boolean) If the address is valid or not. If not, this is the only property returned.\n"
-            "  \"address\" : \"address\",        (string) The bitcoin address validated\n"
+            "  \"address\" : \"address\",        (string) The quasarappcoin address validated\n"
             "  \"scriptPubKey\" : \"hex\",       (string) The hex-encoded scriptPubKey generated by the address\n"
             "  \"isscript\" : true|false,      (boolean) If the key is a script\n"
             "  \"iswitness\" : true|false,     (boolean) If the address is a witness address\n"
@@ -277,7 +277,7 @@ static UniValue verifymessage(const JSONRPCRequest& request)
             RPCHelpMan{"verifymessage",
                 "\nVerify a signed message\n",
                 {
-                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address to use for the signature."},
+                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The quasarappcoin address to use for the signature."},
                     {"signature", RPCArg::Type::STR, RPCArg::Optional::NO, "The signature provided by the signer in base 64 encoding (see signmessage)."},
                     {"message", RPCArg::Type::STR, RPCArg::Optional::NO, "The message that was signed."},
                 },
@@ -583,7 +583,7 @@ static UniValue echo(const JSONRPCRequest& request)
             RPCHelpMan{"echo|echojson ...",
                 "\nSimply echo back the input arguments. This command is for testing.\n"
                 "\nThe difference between echo and echojson is that echojson has argument conversion enabled in the client-side table in "
-                "bitcoin-cli and the GUI. There is no server-side difference.",
+                "quasarappcoin-cli and the GUI. There is no server-side difference.",
                 {},
                 RPCResults{},
                 RPCExamples{""},
diff --git a/src/rpc/net.cpp b/src/rpc/net.cpp
index e8cdce623..c8dda0889 100644
--- a/src/rpc/net.cpp
+++ b/src/rpc/net.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -321,7 +321,7 @@ static UniValue getaddednodeinfo(const JSONRPCRequest& request)
             "    \"connected\" : true|false,          (boolean) If connected\n"
             "    \"addresses\" : [                    (list of objects) Only when connected = true\n"
             "       {\n"
-            "         \"address\" : \"192.168.0.201:8333\",  (string) The bitcoin server IP and port we're connected to\n"
+            "         \"address\" : \"192.168.0.201:8333\",  (string) The quasarappcoin server IP and port we're connected to\n"
             "         \"connected\" : \"outbound\"           (string) connection, inbound or outbound\n"
             "       }\n"
             "     ]\n"
diff --git a/src/rpc/protocol.cpp b/src/rpc/protocol.cpp
index 23999b305..761df86b3 100644
--- a/src/rpc/protocol.cpp
+++ b/src/rpc/protocol.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -13,7 +13,7 @@
 #include <version.h>
 
 /**
- * JSON-RPC protocol.  Bitcoin speaks version 1.0 for maximum compatibility,
+ * JSON-RPC protocol.  QuasarAppcoin speaks version 1.0 for maximum compatibility,
  * but uses JSON-RPC 1.1/2.0 standards for parts of the 1.0 standard that were
  * unspecified (HTTP errors and contents of 'error').
  *
diff --git a/src/rpc/protocol.h b/src/rpc/protocol.h
index 6bcbccbd4..4a27aebc4 100644
--- a/src/rpc/protocol.h
+++ b/src/rpc/protocol.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -28,7 +28,7 @@ enum HTTPStatusCode
     HTTP_SERVICE_UNAVAILABLE   = 503,
 };
 
-//! Bitcoin RPC error codes
+//! QuasarAppcoin RPC error codes
 enum RPCErrorCode
 {
     //! Standard JSON-RPC 2.0 errors
@@ -64,7 +64,7 @@ enum RPCErrorCode
     RPC_TRANSACTION_ALREADY_IN_CHAIN= RPC_VERIFY_ALREADY_IN_CHAIN,
 
     //! P2P client errors
-    RPC_CLIENT_NOT_CONNECTED        = -9,  //!< Bitcoin is not connected
+    RPC_CLIENT_NOT_CONNECTED        = -9,  //!< QuasarAppcoin is not connected
     RPC_CLIENT_IN_INITIAL_DOWNLOAD  = -10, //!< Still downloading initial blocks
     RPC_CLIENT_NODE_ALREADY_ADDED   = -23, //!< Node is already added
     RPC_CLIENT_NODE_NOT_ADDED       = -24, //!< Node has not been added before
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index 78d7bbc80..a89409f96 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -51,10 +51,10 @@ constexpr static CAmount DEFAULT_MAX_RAW_TX_FEE{COIN / 10};
 
 static void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry)
 {
-    // Call into TxToUniv() in bitcoin-common to decode the transaction hex.
+    // Call into TxToUniv() in quasarappcoin-common to decode the transaction hex.
     //
     // Blockchain contextual information (confirmations and blocktime) is not
-    // available to code in bitcoin-common, so we query them here and push the
+    // available to code in quasarappcoin-common, so we query them here and push the
     // data into the returned UniValue.
     TxToUniv(tx, uint256(), entry, true, RPCSerializationFlags());
 
@@ -134,7 +134,7 @@ static UniValue getrawtransaction(const JSONRPCRequest& request)
             "         \"reqSigs\" : n,            (numeric) The required sigs\n"
             "         \"type\" : \"pubkeyhash\",  (string) The type, eg 'pubkeyhash'\n"
             "         \"addresses\" : [           (json array of string)\n"
-            "           \"address\"        (string) bitcoin address\n"
+            "           \"address\"        (string) quasarappcoin address\n"
             "           ,...\n"
             "         ]\n"
             "       }\n"
@@ -391,7 +391,7 @@ static UniValue createrawtransaction(const JSONRPCRequest& request)
                         {
                             {"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
                                 {
-                                    {"address", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "A key-value pair. The key (string) is the bitcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT},
+                                    {"address", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "A key-value pair. The key (string) is the quasarappcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT},
                                 },
                                 },
                             {"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
@@ -473,7 +473,7 @@ static UniValue decoderawtransaction(const JSONRPCRequest& request)
             "         \"reqSigs\" : n,            (numeric) The required sigs\n"
             "         \"type\" : \"pubkeyhash\",  (string) The type, eg 'pubkeyhash'\n"
             "         \"addresses\" : [           (json array of string)\n"
-            "           \"12tvKAXCxZjSmdNbao16dKXC8tRWfcF5oc\"   (string) bitcoin address\n"
+            "           \"12tvKAXCxZjSmdNbao16dKXC8tRWfcF5oc\"   (string) quasarappcoin address\n"
             "           ,...\n"
             "         ]\n"
             "       }\n"
@@ -528,7 +528,7 @@ static UniValue decodescript(const JSONRPCRequest& request)
             "  \"type\":\"type\",        (string) The output type (e.g. "+GetAllOutputTypes()+")\n"
             "  \"reqSigs\": n,         (numeric) The required signatures\n"
             "  \"addresses\": [        (json array of string)\n"
-            "     \"address\"          (string) bitcoin address\n"
+            "     \"address\"          (string) quasarappcoin address\n"
             "     ,...\n"
             "  ],\n"
             "  \"p2sh\":\"str\"          (string) address of P2SH script wrapping this redeem script (not returned if the script is already a P2SH).\n"
@@ -966,7 +966,7 @@ UniValue decodepsbt(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() != 1)
         throw std::runtime_error(
             RPCHelpMan{"decodepsbt",
-                "\nReturn a JSON object representing the serialized, base64-encoded partially signed Bitcoin transaction.\n",
+                "\nReturn a JSON object representing the serialized, base64-encoded partially signed QuasarAppcoin transaction.\n",
                 {
                     {"psbt", RPCArg::Type::STR, RPCArg::Optional::NO, "The PSBT base64 string"},
                 },
@@ -990,7 +990,7 @@ UniValue decodepsbt(const JSONRPCRequest& request)
             "          \"asm\" : \"asm\",            (string) The asm\n"
             "          \"hex\" : \"hex\",            (string) The hex\n"
             "          \"type\" : \"pubkeyhash\",    (string) The type, eg 'pubkeyhash'\n"
-            "          \"address\" : \"address\"     (string) Bitcoin address if there is one\n"
+            "          \"address\" : \"address\"     (string) QuasarAppcoin address if there is one\n"
             "        }\n"
             "      },\n"
             "      \"partial_signatures\" : {             (json object, optional)\n"
@@ -1241,7 +1241,7 @@ UniValue combinepsbt(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() != 1)
         throw std::runtime_error(
             RPCHelpMan{"combinepsbt",
-                "\nCombine multiple partially signed Bitcoin transactions into one transaction.\n"
+                "\nCombine multiple partially signed QuasarAppcoin transactions into one transaction.\n"
                 "Implements the Combiner role.\n",
                 {
                     {"txs", RPCArg::Type::ARR, RPCArg::Optional::NO, "A json array of base64 strings of partially signed transactions",
@@ -1371,7 +1371,7 @@ UniValue createpsbt(const JSONRPCRequest& request)
                         {
                             {"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
                                 {
-                                    {"address", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "A key-value pair. The key (string) is the bitcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT},
+                                    {"address", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "A key-value pair. The key (string) is the quasarappcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT},
                                 },
                                 },
                             {"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
diff --git a/src/rpc/rawtransaction_util.cpp b/src/rpc/rawtransaction_util.cpp
index 8af491977..7c16f92a6 100644
--- a/src/rpc/rawtransaction_util.cpp
+++ b/src/rpc/rawtransaction_util.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -110,7 +110,7 @@ CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniVal
         } else {
             CTxDestination destination = DecodeDestination(name_);
             if (!IsValidDestination(destination)) {
-                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ") + name_);
+                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid QuasarAppcoin address: ") + name_);
             }
 
             if (!destinations.insert(destination).second) {
diff --git a/src/rpc/rawtransaction_util.h b/src/rpc/rawtransaction_util.h
index c115d33a7..72349eacb 100644
--- a/src/rpc/rawtransaction_util.h
+++ b/src/rpc/rawtransaction_util.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/rpc/register.h b/src/rpc/register.h
index 374a1e3db..fa41b2031 100644
--- a/src/rpc/register.h
+++ b/src/rpc/register.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/rpc/server.cpp b/src/rpc/server.cpp
index 9df4070cb..5ff1ce295 100644
--- a/src/rpc/server.cpp
+++ b/src/rpc/server.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -164,7 +164,7 @@ UniValue stop(const JSONRPCRequest& jsonRequest)
     if (jsonRequest.fHelp || jsonRequest.params.size() > 1)
         throw std::runtime_error(
             RPCHelpMan{"stop",
-                "\nStop Bitcoin server.",
+                "\nStop QuasarAppcoin server.",
                 {},
                 RPCResults{},
                 RPCExamples{""},
@@ -175,7 +175,7 @@ UniValue stop(const JSONRPCRequest& jsonRequest)
     if (jsonRequest.params[0].isNum()) {
         MilliSleep(jsonRequest.params[0].get_int());
     }
-    return "Bitcoin server stopping";
+    return "QuasarAppcoin server stopping";
 }
 
 static UniValue uptime(const JSONRPCRequest& jsonRequest)
diff --git a/src/rpc/server.h b/src/rpc/server.h
index 431ff0bb7..0e3f21f6d 100644
--- a/src/rpc/server.h
+++ b/src/rpc/server.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -130,7 +130,7 @@ public:
 };
 
 /**
- * Bitcoin RPC command dispatcher.
+ * QuasarAppcoin RPC command dispatcher.
  */
 class CRPCTable
 {
diff --git a/src/rpc/util.cpp b/src/rpc/util.cpp
index 1a87c9f93..e8ddb3c0b 100644
--- a/src/rpc/util.cpp
+++ b/src/rpc/util.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Copyright (c) 2017-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -105,7 +105,7 @@ std::vector<unsigned char> ParseHexO(const UniValue& o, std::string strKey)
 
 std::string HelpExampleCli(const std::string& methodname, const std::string& args)
 {
-    return "> bitcoin-cli " + methodname + " " + args + "\n";
+    return "> quasarappcoin-cli " + methodname + " " + args + "\n";
 }
 
 std::string HelpExampleRpc(const std::string& methodname, const std::string& args)
diff --git a/src/rpc/util.h b/src/rpc/util.h
index b5b578925..e2e2b83c4 100644
--- a/src/rpc/util.h
+++ b/src/rpc/util.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Copyright (c) 2017-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/scheduler.cpp b/src/scheduler.cpp
index fdc859b3a..1c52eac6f 100644
--- a/src/scheduler.cpp
+++ b/src/scheduler.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/scheduler.h b/src/scheduler.h
index 436f661c5..6a2e3d40d 100644
--- a/src/scheduler.h
+++ b/src/scheduler.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/bitcoinconsensus.cpp b/src/script/bitcoinconsensus.cpp
index 15e204062..3344e291b 100644
--- a/src/script/bitcoinconsensus.cpp
+++ b/src/script/bitcoinconsensus.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/bitcoinconsensus.h b/src/script/bitcoinconsensus.h
index c5dceac84..78e558b82 100644
--- a/src/script/bitcoinconsensus.h
+++ b/src/script/bitcoinconsensus.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/descriptor.cpp b/src/script/descriptor.cpp
index a333d4d4a..8c4481ac9 100644
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/descriptor.h b/src/script/descriptor.h
index 907a10228..1afe7e2ac 100644
--- a/src/script/descriptor.h
+++ b/src/script/descriptor.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index 95b25b491..b6d2a40bc 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -173,7 +173,7 @@ bool static IsLowDERSignature(const valtype &vchSig, ScriptError* serror) {
     if (!IsValidSignatureEncoding(vchSig)) {
         return set_error(serror, SCRIPT_ERR_SIG_DER);
     }
-    // https://bitcoin.stackexchange.com/a/12556:
+    // https://quasarappcoin.stackexchange.com/a/12556:
     //     Also note that inside transaction signatures, an extra hashtype byte
     //     follows the actual signature data.
     std::vector<unsigned char> vchSigCopy(vchSig.begin(), vchSig.begin() + vchSig.size() - 1);
diff --git a/src/script/interpreter.h b/src/script/interpreter.h
index 276ff9a58..fba2b0149 100644
--- a/src/script/interpreter.h
+++ b/src/script/interpreter.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/ismine.cpp b/src/script/ismine.cpp
index 51bd2d6e9..d5f5519d2 100644
--- a/src/script/ismine.cpp
+++ b/src/script/ismine.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/ismine.h b/src/script/ismine.h
index 55e28e225..2a76a6103 100644
--- a/src/script/ismine.h
+++ b/src/script/ismine.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/script.cpp b/src/script/script.cpp
index 982aa241e..ac9c37f28 100644
--- a/src/script/script.cpp
+++ b/src/script/script.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/script.h b/src/script/script.h
index 11e8661a5..e9f0f1d8d 100644
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -522,7 +522,7 @@ public:
     }
 
     /**
-     * Pre-version-0.6, Bitcoin always counted CHECKMULTISIGs
+     * Pre-version-0.6, QuasarAppcoin always counted CHECKMULTISIGs
      * as 20 sigops. With pay-to-script-hash, that changed:
      * CHECKMULTISIGs serialized in scriptSigs are
      * counted more accurately, assuming they are of the form
diff --git a/src/script/script_error.cpp b/src/script/script_error.cpp
index 9d7deffc7..6d92af0a4 100644
--- a/src/script/script_error.cpp
+++ b/src/script/script_error.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/script_error.h b/src/script/script_error.h
index 400f63ff0..87b494a27 100644
--- a/src/script/script_error.h
+++ b/src/script/script_error.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/sigcache.cpp b/src/script/sigcache.cpp
index 94005cf6f..5880c687d 100644
--- a/src/script/sigcache.cpp
+++ b/src/script/sigcache.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/sigcache.h b/src/script/sigcache.h
index 807b61b54..e35c351e0 100644
--- a/src/script/sigcache.h
+++ b/src/script/sigcache.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index 36dd68a3d..f1514a3d1 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/sign.h b/src/script/sign.h
index f746325b9..cd8509368 100644
--- a/src/script/sign.h
+++ b/src/script/sign.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/standard.cpp b/src/script/standard.cpp
index 31bfd04b0..c553c81f4 100644
--- a/src/script/standard.cpp
+++ b/src/script/standard.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/script/standard.h b/src/script/standard.h
index f16068c41..ea08e5fd0 100644
--- a/src/script/standard.h
+++ b/src/script/standard.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -118,7 +118,7 @@ struct WitnessUnknown
  *  * WitnessV0ScriptHash: TX_WITNESS_V0_SCRIPTHASH destination (P2WSH)
  *  * WitnessV0KeyHash: TX_WITNESS_V0_KEYHASH destination (P2WPKH)
  *  * WitnessUnknown: TX_WITNESS_UNKNOWN destination (P2W???)
- *  A CTxDestination is the internal data type encoded in a bitcoin address
+ *  A CTxDestination is the internal data type encoded in a quasarappcoin address
  */
 typedef boost::variant<CNoDestination, CKeyID, CScriptID, WitnessV0ScriptHash, WitnessV0KeyHash, WitnessUnknown> CTxDestination;
 
@@ -162,7 +162,7 @@ bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet)
 bool ExtractDestinations(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CTxDestination>& addressRet, int& nRequiredRet);
 
 /**
- * Generate a Bitcoin scriptPubKey for the given CTxDestination. Returns a P2PKH
+ * Generate a QuasarAppcoin scriptPubKey for the given CTxDestination. Returns a P2PKH
  * script for a CKeyID destination, a P2SH script for a CScriptID, and an empty
  * script for CNoDestination.
  */
diff --git a/src/secp256k1/contrib/lax_der_parsing.h b/src/secp256k1/contrib/lax_der_parsing.h
index 7eaf63bf6..bbbe9e98f 100644
--- a/src/secp256k1/contrib/lax_der_parsing.h
+++ b/src/secp256k1/contrib/lax_der_parsing.h
@@ -68,7 +68,7 @@ extern "C" {
  *  This function will accept any valid DER encoded signature, even if the
  *  encoded numbers are out of range. In addition, it will accept signatures
  *  which violate the DER spec in various ways. Its purpose is to allow
- *  validation of the Bitcoin blockchain, which includes non-DER signatures
+ *  validation of the QuasarAppcoin blockchain, which includes non-DER signatures
  *  from before the network rules were updated to enforce DER. Note that
  *  the set of supported violations is a strict subset of what OpenSSL will
  *  accept.
diff --git a/src/serialize.h b/src/serialize.h
index b001ee132..ceacb43e3 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/shutdown.cpp b/src/shutdown.cpp
index dec497d8e..bc03262ad 100644
--- a/src/shutdown.cpp
+++ b/src/shutdown.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/shutdown.h b/src/shutdown.h
index 3ed851c78..fb4509a22 100644
--- a/src/shutdown.h
+++ b/src/shutdown.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/span.h b/src/span.h
index 77de059fa..0cbadbdbf 100644
--- a/src/span.h
+++ b/src/span.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/streams.h b/src/streams.h
index 4e600f182..fb1c90308 100644
--- a/src/streams.h
+++ b/src/streams.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/support/allocators/secure.h b/src/support/allocators/secure.h
index 57f5b1f73..fe5c7c42c 100644
--- a/src/support/allocators/secure.h
+++ b/src/support/allocators/secure.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/support/allocators/zeroafterfree.h b/src/support/allocators/zeroafterfree.h
index c7ed5ef30..d11ac1d1c 100644
--- a/src/support/allocators/zeroafterfree.h
+++ b/src/support/allocators/zeroafterfree.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/support/cleanse.cpp b/src/support/cleanse.cpp
index 17a4a4c2b..53db221dc 100644
--- a/src/support/cleanse.cpp
+++ b/src/support/cleanse.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/support/cleanse.h b/src/support/cleanse.h
index 5298214e4..d3d4a068b 100644
--- a/src/support/cleanse.h
+++ b/src/support/cleanse.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/support/events.h b/src/support/events.h
index 0a74d0236..fd116a056 100644
--- a/src/support/events.h
+++ b/src/support/events.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/support/lockedpool.cpp b/src/support/lockedpool.cpp
index 5c2050e4a..59387fccb 100644
--- a/src/support/lockedpool.cpp
+++ b/src/support/lockedpool.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/support/lockedpool.h b/src/support/lockedpool.h
index b420c909f..5df448919 100644
--- a/src/support/lockedpool.h
+++ b/src/support/lockedpool.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/sync.cpp b/src/sync.cpp
index e7c0a6f9b..cd73e28f0 100644
--- a/src/sync.cpp
+++ b/src/sync.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/sync.h b/src/sync.h
index 2667fb52f..449488e5a 100644
--- a/src/sync.h
+++ b/src/sync.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/addrman_tests.cpp b/src/test/addrman_tests.cpp
index eeb54b4cf..5d27d7dc5 100644
--- a/src/test/addrman_tests.cpp
+++ b/src/test/addrman_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #include <addrman.h>
diff --git a/src/test/allocator_tests.cpp b/src/test/allocator_tests.cpp
index f25569170..879ef9729 100644
--- a/src/test/allocator_tests.cpp
+++ b/src/test/allocator_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/amount_tests.cpp b/src/test/amount_tests.cpp
index 378fe285d..4f63824c5 100644
--- a/src/test/amount_tests.cpp
+++ b/src/test/amount_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2019 The Bitcoin Core developers
+// Copyright (c) 2016-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/arith_uint256_tests.cpp b/src/test/arith_uint256_tests.cpp
index 809c627d2..f5e77f460 100644
--- a/src/test/arith_uint256_tests.cpp
+++ b/src/test/arith_uint256_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/base32_tests.cpp b/src/test/base32_tests.cpp
index b3bed2434..0ae927ecf 100644
--- a/src/test/base32_tests.cpp
+++ b/src/test/base32_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/base58_tests.cpp b/src/test/base58_tests.cpp
index cb376cddb..d1aa3c6e7 100644
--- a/src/test/base58_tests.cpp
+++ b/src/test/base58_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/base64_tests.cpp b/src/test/base64_tests.cpp
index 9ffffb0b7..a2858a7f4 100644
--- a/src/test/base64_tests.cpp
+++ b/src/test/base64_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/bip32_tests.cpp b/src/test/bip32_tests.cpp
index 0c0423c0d..494ea99ac 100644
--- a/src/test/bip32_tests.cpp
+++ b/src/test/bip32_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2013-2019 The Bitcoin Core developers
+// Copyright (c) 2013-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/blockencodings_tests.cpp b/src/test/blockencodings_tests.cpp
index f57e1a0eb..5fa65dba0 100644
--- a/src/test/blockencodings_tests.cpp
+++ b/src/test/blockencodings_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/blockfilter_index_tests.cpp b/src/test/blockfilter_index_tests.cpp
index db0b97346..24b365d2a 100644
--- a/src/test/blockfilter_index_tests.cpp
+++ b/src/test/blockfilter_index_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Copyright (c) 2017-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/blockfilter_tests.cpp b/src/test/blockfilter_tests.cpp
index df0a041e0..281807c61 100644
--- a/src/test/blockfilter_tests.cpp
+++ b/src/test/blockfilter_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018-2019 The Bitcoin Core developers
+// Copyright (c) 2018-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/bloom_tests.cpp b/src/test/bloom_tests.cpp
index 442149400..ea6a96098 100644
--- a/src/test/bloom_tests.cpp
+++ b/src/test/bloom_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/bswap_tests.cpp b/src/test/bswap_tests.cpp
index 8fd4e5d5d..9b1bacc7c 100644
--- a/src/test/bswap_tests.cpp
+++ b/src/test/bswap_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2019 The Bitcoin Core developers
+// Copyright (c) 2016-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -11,7 +11,7 @@ BOOST_FIXTURE_TEST_SUITE(bswap_tests, BasicTestingSetup)
 
 BOOST_AUTO_TEST_CASE(bswap_tests)
 {
-	// Sibling in bitcoin/src/qt/test/compattests.cpp
+	// Sibling in quasarappcoin/src/qt/test/compattests.cpp
 	uint16_t u1 = 0x1234;
 	uint32_t u2 = 0x56789abc;
 	uint64_t u3 = 0xdef0123456789abc;
diff --git a/src/test/checkqueue_tests.cpp b/src/test/checkqueue_tests.cpp
index 408a7fbda..83aca9def 100644
--- a/src/test/checkqueue_tests.cpp
+++ b/src/test/checkqueue_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/coins_tests.cpp b/src/test/coins_tests.cpp
index 232c077c6..1f3f91be7 100644
--- a/src/test/coins_tests.cpp
+++ b/src/test/coins_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2019 The Bitcoin Core developers
+// Copyright (c) 2014-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/compress_tests.cpp b/src/test/compress_tests.cpp
index 6cef8cd8a..daa02ffc6 100644
--- a/src/test/compress_tests.cpp
+++ b/src/test/compress_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/crypto_tests.cpp b/src/test/crypto_tests.cpp
index 0d05b6514..ab352e2d1 100644
--- a/src/test/crypto_tests.cpp
+++ b/src/test/crypto_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2019 The Bitcoin Core developers
+// Copyright (c) 2014-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -210,7 +210,7 @@ BOOST_AUTO_TEST_CASE(sha256_testvectors) {
                "f08a78cbbaee082b052ae0708f32fa1e50c5c421aa772ba5dbb406a2ea6be342");
     TestSHA256("This is exactly 64 bytes long, not counting the terminating byte",
                "ab64eff7e88e2e46165e29f2bce41826bd4c7b3552f6b382a9e7d3af47c245f8");
-    TestSHA256("As Bitcoin relies on 80 byte header hashes, we want to have an example for that.",
+    TestSHA256("As QuasarAppcoin relies on 80 byte header hashes, we want to have an example for that.",
                "7406e8de7d6e4fffc573daef05aefb8806e7790f55eab5576f31349743cca743");
     TestSHA256(std::string(1000000, 'a'),
                "cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0");
diff --git a/src/test/cuckoocache_tests.cpp b/src/test/cuckoocache_tests.cpp
index d38ede691..0d6cb8580 100644
--- a/src/test/cuckoocache_tests.cpp
+++ b/src/test/cuckoocache_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #include <boost/test/unit_test.hpp>
diff --git a/src/test/dbwrapper_tests.cpp b/src/test/dbwrapper_tests.cpp
index 0bde92c18..1add554a1 100644
--- a/src/test/dbwrapper_tests.cpp
+++ b/src/test/dbwrapper_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/denialofservice_tests.cpp b/src/test/denialofservice_tests.cpp
index bcb9a7c18..a76ec4ea2 100644
--- a/src/test/denialofservice_tests.cpp
+++ b/src/test/denialofservice_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/descriptor_tests.cpp b/src/test/descriptor_tests.cpp
index f5bda7d5e..c63390b31 100644
--- a/src/test/descriptor_tests.cpp
+++ b/src/test/descriptor_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018-2019 The Bitcoin Core developers
+// Copyright (c) 2018-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/flatfile_tests.cpp b/src/test/flatfile_tests.cpp
index 1db2f8054..9f309c96a 100644
--- a/src/test/flatfile_tests.cpp
+++ b/src/test/flatfile_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/fs_tests.cpp b/src/test/fs_tests.cpp
index 6bd6bb1be..704f2cfe6 100644
--- a/src/test/fs_tests.cpp
+++ b/src/test/fs_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 //
@@ -17,13 +17,13 @@ BOOST_AUTO_TEST_CASE(fsbridge_fstream)
     fs::path tmpfile2 = tmpfolder / L"fs_tests_₿_🏃";
     {
         fsbridge::ofstream file(tmpfile1);
-        file << "bitcoin";
+        file << "quasarappcoin";
     }
     {
         fsbridge::ifstream file(tmpfile2);
         std::string input_buffer;
         file >> input_buffer;
-        BOOST_CHECK_EQUAL(input_buffer, "bitcoin");
+        BOOST_CHECK_EQUAL(input_buffer, "quasarappcoin");
     }
     {
         fsbridge::ifstream file(tmpfile1, std::ios_base::in | std::ios_base::ate);
@@ -43,13 +43,13 @@ BOOST_AUTO_TEST_CASE(fsbridge_fstream)
     }
     {
         fsbridge::ofstream file(tmpfile2, std::ios_base::out | std::ios_base::trunc);
-        file << "bitcoin";
+        file << "quasarappcoin";
     }
     {
         fsbridge::ifstream file(tmpfile1);
         std::string input_buffer;
         file >> input_buffer;
-        BOOST_CHECK_EQUAL(input_buffer, "bitcoin");
+        BOOST_CHECK_EQUAL(input_buffer, "quasarappcoin");
     }
 }
 
diff --git a/src/test/fuzz/deserialize.cpp b/src/test/fuzz/deserialize.cpp
index 97d763371..718cf1d83 100644
--- a/src/test/fuzz/deserialize.cpp
+++ b/src/test/fuzz/deserialize.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/fuzz/fuzz.cpp b/src/test/fuzz/fuzz.cpp
index 0709da556..4c8f6c0fd 100644
--- a/src/test/fuzz/fuzz.cpp
+++ b/src/test/fuzz/fuzz.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/fuzz/fuzz.h b/src/test/fuzz/fuzz.h
index 8b03a7e46..e9eb4cad8 100644
--- a/src/test/fuzz/fuzz.h
+++ b/src/test/fuzz/fuzz.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/fuzz/script_flags.cpp b/src/test/fuzz/script_flags.cpp
index 2c0bfa360..6998d3a24 100644
--- a/src/test/fuzz/script_flags.cpp
+++ b/src/test/fuzz/script_flags.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/gen/crypto_gen.cpp b/src/test/gen/crypto_gen.cpp
index ca8c65806..8e40e875d 100644
--- a/src/test/gen/crypto_gen.cpp
+++ b/src/test/gen/crypto_gen.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #include <test/gen/crypto_gen.h>
diff --git a/src/test/gen/crypto_gen.h b/src/test/gen/crypto_gen.h
index 7c2fb0350..3135dd841 100644
--- a/src/test/gen/crypto_gen.h
+++ b/src/test/gen/crypto_gen.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #ifndef BITCOIN_TEST_GEN_CRYPTO_GEN_H
diff --git a/src/test/getarg_tests.cpp b/src/test/getarg_tests.cpp
index 8a4234464..639a0c53c 100644
--- a/src/test/getarg_tests.cpp
+++ b/src/test/getarg_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/hash_tests.cpp b/src/test/hash_tests.cpp
index 325b7002f..0c1bab80c 100644
--- a/src/test/hash_tests.cpp
+++ b/src/test/hash_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2013-2019 The Bitcoin Core developers
+// Copyright (c) 2013-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -20,7 +20,7 @@ BOOST_AUTO_TEST_CASE(murmurhash3)
 
     // Test MurmurHash3 with various inputs. Of course this is retested in the
     // bloom filter tests - they would fail if MurmurHash3() had any problems -
-    // but is useful for those trying to implement Bitcoin libraries as a
+    // but is useful for those trying to implement QuasarAppcoin libraries as a
     // source of test data for their MurmurHash3() primitive during
     // development.
     //
diff --git a/src/test/key_io_tests.cpp b/src/test/key_io_tests.cpp
index e924f27d1..76de3671e 100644
--- a/src/test/key_io_tests.cpp
+++ b/src/test/key_io_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/key_properties.cpp b/src/test/key_properties.cpp
index 8b508ed7f..0acd95279 100644
--- a/src/test/key_properties.cpp
+++ b/src/test/key_properties.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018-2019 The Bitcoin Core developers
+// Copyright (c) 2018-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #include <key.h>
diff --git a/src/test/key_tests.cpp b/src/test/key_tests.cpp
index e816546e6..cb2d60880 100644
--- a/src/test/key_tests.cpp
+++ b/src/test/key_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/limitedmap_tests.cpp b/src/test/limitedmap_tests.cpp
index 00b36f51f..942ed10be 100644
--- a/src/test/limitedmap_tests.cpp
+++ b/src/test/limitedmap_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/main.cpp b/src/test/main.cpp
index ff3f36b56..3219eeaf9 100644
--- a/src/test/main.cpp
+++ b/src/test/main.cpp
@@ -1,7 +1,7 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#define BOOST_TEST_MODULE Bitcoin Core Test Suite
+#define BOOST_TEST_MODULE QuasarAppcoin Core Test Suite
 
 #include <boost/test/unit_test.hpp>
diff --git a/src/test/mempool_tests.cpp b/src/test/mempool_tests.cpp
index 0f74b379c..abc98abf2 100644
--- a/src/test/mempool_tests.cpp
+++ b/src/test/mempool_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/merkle_tests.cpp b/src/test/merkle_tests.cpp
index 1684258c9..2f8e23f74 100644
--- a/src/test/merkle_tests.cpp
+++ b/src/test/merkle_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2019 The Bitcoin Core developers
+// Copyright (c) 2015-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -81,7 +81,7 @@ static void MerkleComputation(const std::vector<uint256>& leaves, uint256* proot
     bool matchh = matchlevel == level;
     while (count != (((uint32_t)1) << level)) {
         // If we reach this point, h is an inner value that is not the top.
-        // We combine it with itself (Bitcoin's special rule for odd levels in
+        // We combine it with itself (QuasarAppcoin's special rule for odd levels in
         // the tree) to produce a higher level one.
         if (pbranch && matchh) {
             pbranch->push_back(h);
diff --git a/src/test/merkleblock_tests.cpp b/src/test/merkleblock_tests.cpp
index eac43471c..dd0e56714 100644
--- a/src/test/merkleblock_tests.cpp
+++ b/src/test/merkleblock_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/miner_tests.cpp b/src/test/miner_tests.cpp
index 6ed435905..754d1b145 100644
--- a/src/test/miner_tests.cpp
+++ b/src/test/miner_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/multisig_tests.cpp b/src/test/multisig_tests.cpp
index 682f1bee2..5d68bfc31 100644
--- a/src/test/multisig_tests.cpp
+++ b/src/test/multisig_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/net_tests.cpp b/src/test/net_tests.cpp
index 54d18c0a1..58b82fb8c 100644
--- a/src/test/net_tests.cpp
+++ b/src/test/net_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #include <addrman.h>
diff --git a/src/test/netbase_tests.cpp b/src/test/netbase_tests.cpp
index dd5e3eb6d..6e0699ddc 100644
--- a/src/test/netbase_tests.cpp
+++ b/src/test/netbase_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/pmt_tests.cpp b/src/test/pmt_tests.cpp
index c5513ae9f..962c6bac7 100644
--- a/src/test/pmt_tests.cpp
+++ b/src/test/pmt_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/policyestimator_tests.cpp b/src/test/policyestimator_tests.cpp
index 149094fc0..c1e143f3c 100644
--- a/src/test/policyestimator_tests.cpp
+++ b/src/test/policyestimator_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/pow_tests.cpp b/src/test/pow_tests.cpp
index 653433bfc..be31b9dbc 100644
--- a/src/test/pow_tests.cpp
+++ b/src/test/pow_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2019 The Bitcoin Core developers
+// Copyright (c) 2015-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/prevector_tests.cpp b/src/test/prevector_tests.cpp
index 141be50f5..4c5064951 100644
--- a/src/test/prevector_tests.cpp
+++ b/src/test/prevector_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2019 The Bitcoin Core developers
+// Copyright (c) 2015-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/raii_event_tests.cpp b/src/test/raii_event_tests.cpp
index 2b01acf7f..19c97b8ea 100644
--- a/src/test/raii_event_tests.cpp
+++ b/src/test/raii_event_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2019 The Bitcoin Core developers
+// Copyright (c) 2016-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/random_tests.cpp b/src/test/random_tests.cpp
index e6fbe2355..231a18919 100644
--- a/src/test/random_tests.cpp
+++ b/src/test/random_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Copyright (c) 2017-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/reverselock_tests.cpp b/src/test/reverselock_tests.cpp
index 69db9dcf4..cef2109d5 100644
--- a/src/test/reverselock_tests.cpp
+++ b/src/test/reverselock_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2019 The Bitcoin Core developers
+// Copyright (c) 2015-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/rpc_tests.cpp b/src/test/rpc_tests.cpp
index 07d1326bc..4c767c24e 100644
--- a/src/test/rpc_tests.cpp
+++ b/src/test/rpc_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/sanity_tests.cpp b/src/test/sanity_tests.cpp
index 891aa8e5c..cfac41502 100644
--- a/src/test/sanity_tests.cpp
+++ b/src/test/sanity_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/scheduler_tests.cpp b/src/test/scheduler_tests.cpp
index 42242b962..1da33b4a3 100644
--- a/src/test/scheduler_tests.cpp
+++ b/src/test/scheduler_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/script_p2sh_tests.cpp b/src/test/script_p2sh_tests.cpp
index 0ce5f09e4..8485dd0a9 100644
--- a/src/test/script_p2sh_tests.cpp
+++ b/src/test/script_p2sh_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/script_standard_tests.cpp b/src/test/script_standard_tests.cpp
index 36a2b1bee..0a67a439b 100644
--- a/src/test/script_standard_tests.cpp
+++ b/src/test/script_standard_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Copyright (c) 2017-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
index 588ae55a6..54d3e3343 100644
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/scriptnum10.h b/src/test/scriptnum10.h
index e763b6427..e2fe718c7 100644
--- a/src/test/scriptnum10.h
+++ b/src/test/scriptnum10.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -23,7 +23,7 @@ public:
 class CScriptNum10
 {
 /**
- * The ScriptNum implementation from Bitcoin Core 0.10.0, for cross-comparison.
+ * The ScriptNum implementation from QuasarAppcoin Core 0.10.0, for cross-comparison.
  */
 public:
 
diff --git a/src/test/scriptnum_tests.cpp b/src/test/scriptnum_tests.cpp
index e7916f500..e7fcd89bd 100644
--- a/src/test/scriptnum_tests.cpp
+++ b/src/test/scriptnum_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/serialize_tests.cpp b/src/test/serialize_tests.cpp
index 2fab309aa..8e0445628 100644
--- a/src/test/serialize_tests.cpp
+++ b/src/test/serialize_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/setup_common.cpp b/src/test/setup_common.cpp
index 6b671b240..cd4419ac8 100644
--- a/src/test/setup_common.cpp
+++ b/src/test/setup_common.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/setup_common.h b/src/test/setup_common.h
index 893eca216..600395970 100644
--- a/src/test/setup_common.h
+++ b/src/test/setup_common.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2019 The Bitcoin Core developers
+// Copyright (c) 2015-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/sighash_tests.cpp b/src/test/sighash_tests.cpp
index 15f8db899..958ba23c2 100644
--- a/src/test/sighash_tests.cpp
+++ b/src/test/sighash_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2013-2019 The Bitcoin Core developers
+// Copyright (c) 2013-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/sigopcount_tests.cpp b/src/test/sigopcount_tests.cpp
index 4efa023fb..1a19eaef8 100644
--- a/src/test/sigopcount_tests.cpp
+++ b/src/test/sigopcount_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/skiplist_tests.cpp b/src/test/skiplist_tests.cpp
index 3d39dfdb7..2d6b8de0b 100644
--- a/src/test/skiplist_tests.cpp
+++ b/src/test/skiplist_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2019 The Bitcoin Core developers
+// Copyright (c) 2014-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/streams_tests.cpp b/src/test/streams_tests.cpp
index 4e37199c6..e393ad439 100644
--- a/src/test/streams_tests.cpp
+++ b/src/test/streams_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/sync_tests.cpp b/src/test/sync_tests.cpp
index c1399d2db..e8e90f61e 100644
--- a/src/test/sync_tests.cpp
+++ b/src/test/sync_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/timedata_tests.cpp b/src/test/timedata_tests.cpp
index b4c0e6a0f..f78e91f9f 100644
--- a/src/test/timedata_tests.cpp
+++ b/src/test/timedata_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 //
diff --git a/src/test/transaction_tests.cpp b/src/test/transaction_tests.cpp
index 6242fdabd..3066806b2 100644
--- a/src/test/transaction_tests.cpp
+++ b/src/test/transaction_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/txindex_tests.cpp b/src/test/txindex_tests.cpp
index 9d62b471c..e06d6452f 100644
--- a/src/test/txindex_tests.cpp
+++ b/src/test/txindex_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Copyright (c) 2017-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/txvalidation_tests.cpp b/src/test/txvalidation_tests.cpp
index 331c340b7..3355b3d1c 100644
--- a/src/test/txvalidation_tests.cpp
+++ b/src/test/txvalidation_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Copyright (c) 2017-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/txvalidationcache_tests.cpp b/src/test/txvalidationcache_tests.cpp
index 01018043b..5e3a4d50b 100644
--- a/src/test/txvalidationcache_tests.cpp
+++ b/src/test/txvalidationcache_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/uint256_tests.cpp b/src/test/uint256_tests.cpp
index c1749fb85..9542c9322 100644
--- a/src/test/uint256_tests.cpp
+++ b/src/test/uint256_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #include <arith_uint256.h>
diff --git a/src/test/util.cpp b/src/test/util.cpp
index 05d3a97a5..0580bbd5e 100644
--- a/src/test/util.cpp
+++ b/src/test/util.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/util.h b/src/test/util.h
index 8ba647ec3..bbaca226d 100644
--- a/src/test/util.h
+++ b/src/test/util.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp
index 0f1834240..3c4b22cdf 100644
--- a/src/test/util_tests.cpp
+++ b/src/test/util_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -1439,7 +1439,7 @@ BOOST_AUTO_TEST_CASE(test_ToUpper)
 BOOST_AUTO_TEST_CASE(test_Capitalize)
 {
     BOOST_CHECK_EQUAL(Capitalize(""), "");
-    BOOST_CHECK_EQUAL(Capitalize("bitcoin"), "Bitcoin");
+    BOOST_CHECK_EQUAL(Capitalize("quasarappcoin"), "QuasarAppcoin");
     BOOST_CHECK_EQUAL(Capitalize("\x00\xfe\xff"), "\x00\xfe\xff");
 }
 
diff --git a/src/test/util_threadnames_tests.cpp b/src/test/util_threadnames_tests.cpp
index 71c0168ca..e2c22632d 100644
--- a/src/test/util_threadnames_tests.cpp
+++ b/src/test/util_threadnames_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/validation_block_tests.cpp b/src/test/validation_block_tests.cpp
index 4d54aa9b2..113483b11 100644
--- a/src/test/validation_block_tests.cpp
+++ b/src/test/validation_block_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018-2019 The Bitcoin Core developers
+// Copyright (c) 2018-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/validation_tests.cpp b/src/test/validation_tests.cpp
index 101025d31..cb09cd4e4 100644
--- a/src/test/validation_tests.cpp
+++ b/src/test/validation_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2019 The Bitcoin Core developers
+// Copyright (c) 2014-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/test/versionbits_tests.cpp b/src/test/versionbits_tests.cpp
index 38d91b664..a6312267a 100644
--- a/src/test/versionbits_tests.cpp
+++ b/src/test/versionbits_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2019 The Bitcoin Core developers
+// Copyright (c) 2014-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/threadinterrupt.cpp b/src/threadinterrupt.cpp
index 340106ed9..6dbc383ef 100644
--- a/src/threadinterrupt.cpp
+++ b/src/threadinterrupt.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/threadinterrupt.h b/src/threadinterrupt.h
index 274357137..f26d365e1 100644
--- a/src/threadinterrupt.h
+++ b/src/threadinterrupt.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/threadsafety.h b/src/threadsafety.h
index 33acddc65..ccbdd3da2 100644
--- a/src/threadsafety.h
+++ b/src/threadsafety.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/timedata.cpp b/src/timedata.cpp
index 9c022c9ad..25efbbc4c 100644
--- a/src/timedata.cpp
+++ b/src/timedata.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/timedata.h b/src/timedata.h
index b165ecde2..e3b8aa4ba 100644
--- a/src/timedata.h
+++ b/src/timedata.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/tinyformat.h b/src/tinyformat.h
index 14b7cd302..2e79cb643 100644
--- a/src/tinyformat.h
+++ b/src/tinyformat.h
@@ -1052,7 +1052,7 @@ TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_FORMAT_FUNCS)
 
 #endif
 
-// Added for Bitcoin Core
+// Added for QuasarAppcoin Core
 template<typename... Args>
 std::string format(const std::string &fmt, const Args&... args)
 {
diff --git a/src/torcontrol.cpp b/src/torcontrol.cpp
index 550e23b22..71499d1f5 100644
--- a/src/torcontrol.cpp
+++ b/src/torcontrol.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Copyright (c) 2017 The Zcash developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
@@ -401,7 +401,7 @@ static bool WriteBinaryFile(const fs::path &filename, const std::string &data)
     return true;
 }
 
-/****** Bitcoin specific TorController implementation ********/
+/****** QuasarAppcoin specific TorController implementation ********/
 
 /** Controller that connects to Tor control socket, authenticate, then create
  * and maintain an ephemeral hidden service.
diff --git a/src/torcontrol.h b/src/torcontrol.h
index 079146b54..5a415c327 100644
--- a/src/torcontrol.h
+++ b/src/torcontrol.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/txdb.cpp b/src/txdb.cpp
index 8447352c5..737103f13 100644
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/txdb.h b/src/txdb.h
index c4ece1150..bc4fbfcfb 100644
--- a/src/txdb.h
+++ b/src/txdb.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -35,7 +35,7 @@ static const int64_t nMinDbCache = 4;
 static const int64_t nMaxBlockDBCache = 2;
 //! Max memory allocated to block tree DB specific cache, if -txindex (MiB)
 // Unlike for the UTXO database, for the txindex scenario the leveldb cache make
-// a meaningful difference: https://github.com/bitcoin/bitcoin/pull/8273#issuecomment-229601991
+// a meaningful difference: https://github.com/quasarappcoin/quasarappcoin/pull/8273#issuecomment-229601991
 static const int64_t nMaxTxIndexCache = 1024;
 //! Max memory allocated to all block filter index caches combined in MiB.
 static const int64_t max_filter_index_cache = 1024;
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index 90b28227a..79af24cce 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/txmempool.h b/src/txmempool.h
index 3ada47a28..8bbd8b261 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -517,8 +517,8 @@ public:
      * @par Consistency bug
      *
      * The second guarantee above is not currently enforced, but
-     * https://github.com/bitcoin/bitcoin/pull/14193 will fix it. No known code
-     * in bitcoin currently depends on second guarantee, but it is important to
+     * https://github.com/quasarappcoin/quasarappcoin/pull/14193 will fix it. No known code
+     * in quasarappcoin currently depends on second guarantee, but it is important to
      * fix for third party code that needs be able to frequently poll the
      * mempool without locking `cs_main` and without encountering missing
      * transactions during reorgs.
diff --git a/src/ui_interface.cpp b/src/ui_interface.cpp
index 31a95486d..374db3ef4 100644
--- a/src/ui_interface.cpp
+++ b/src/ui_interface.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2010-2018 The Bitcoin Core developers
+// Copyright (c) 2010-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/ui_interface.h b/src/ui_interface.h
index d408f6f88..664950129 100644
--- a/src/ui_interface.h
+++ b/src/ui_interface.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/uint256.cpp b/src/uint256.cpp
index e3bc9712e..c5d210d75 100644
--- a/src/uint256.cpp
+++ b/src/uint256.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/uint256.h b/src/uint256.h
index 97e0cfa01..a45ce281d 100644
--- a/src/uint256.h
+++ b/src/uint256.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/undo.h b/src/undo.h
index 3f50f4caa..f4b394f54 100644
--- a/src/undo.h
+++ b/src/undo.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/univalue/include/univalue.h b/src/univalue/include/univalue.h
index 91b104e56..f79fc11d1 100644
--- a/src/univalue/include/univalue.h
+++ b/src/univalue/include/univalue.h
@@ -1,5 +1,5 @@
 // Copyright 2014 BitPay Inc.
-// Copyright 2015 Bitcoin Core Developers
+// Copyright 2015 QuasarAppcoin Core Developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/univalue/lib/univalue.cpp b/src/univalue/lib/univalue.cpp
index 4c9c15d63..0ba36b6f0 100644
--- a/src/univalue/lib/univalue.cpp
+++ b/src/univalue/lib/univalue.cpp
@@ -1,5 +1,5 @@
 // Copyright 2014 BitPay Inc.
-// Copyright 2015 Bitcoin Core Developers
+// Copyright 2015 QuasarAppcoin Core Developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/univalue/lib/univalue_get.cpp b/src/univalue/lib/univalue_get.cpp
index eabcf2dad..d7c067deb 100644
--- a/src/univalue/lib/univalue_get.cpp
+++ b/src/univalue/lib/univalue_get.cpp
@@ -1,5 +1,5 @@
 // Copyright 2014 BitPay Inc.
-// Copyright 2015 Bitcoin Core Developers
+// Copyright 2015 QuasarAppcoin Core Developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/univalue/test/object.cpp b/src/univalue/test/object.cpp
index 70ccc0d08..444ec1acc 100644
--- a/src/univalue/test/object.cpp
+++ b/src/univalue/test/object.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2014 BitPay Inc.
-// Copyright (c) 2014-2016 The Bitcoin Core developers
+// Copyright (c) 2014-2016 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/bip32.cpp b/src/util/bip32.cpp
index 6f176dd5e..940f09c5e 100644
--- a/src/util/bip32.cpp
+++ b/src/util/bip32.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/bip32.h b/src/util/bip32.h
index 7e58b79f3..5a3e57369 100644
--- a/src/util/bip32.h
+++ b/src/util/bip32.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/bytevectorhash.cpp b/src/util/bytevectorhash.cpp
index f87d0e04b..893862bda 100644
--- a/src/util/bytevectorhash.cpp
+++ b/src/util/bytevectorhash.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/bytevectorhash.h b/src/util/bytevectorhash.h
index b88c17460..042a361d6 100644
--- a/src/util/bytevectorhash.h
+++ b/src/util/bytevectorhash.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/error.cpp b/src/util/error.cpp
index 68ffd8b04..13251bc00 100644
--- a/src/util/error.cpp
+++ b/src/util/error.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2010-2018 The Bitcoin Core developers
+// Copyright (c) 2010-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/error.h b/src/util/error.h
index d93309551..fdbaabfbc 100644
--- a/src/util/error.h
+++ b/src/util/error.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010-2018 The Bitcoin Core developers
+// Copyright (c) 2010-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -10,7 +10,7 @@
  * string functions. Types and functions defined here should not require any
  * outside dependencies.
  *
- * Error types defined here can be used in different parts of the bitcoin
+ * Error types defined here can be used in different parts of the quasarappcoin
  * codebase, to avoid the need to write boilerplate code catching and
  * translating errors passed across wallet/node/rpc/gui code boundaries.
  */
diff --git a/src/util/fees.cpp b/src/util/fees.cpp
index 5fdaa1284..2896d47a6 100644
--- a/src/util/fees.cpp
+++ b/src/util/fees.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/fees.h b/src/util/fees.h
index fc355ce9c..7d645fc98 100644
--- a/src/util/fees.h
+++ b/src/util/fees.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #ifndef BITCOIN_UTIL_FEES_H
diff --git a/src/util/memory.h b/src/util/memory.h
index 15ecf8f80..7016a93c6 100644
--- a/src/util/memory.h
+++ b/src/util/memory.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/moneystr.cpp b/src/util/moneystr.cpp
index f4e41eea4..efc8cf121 100644
--- a/src/util/moneystr.cpp
+++ b/src/util/moneystr.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/moneystr.h b/src/util/moneystr.h
index b8e2812a9..e4e167a99 100644
--- a/src/util/moneystr.h
+++ b/src/util/moneystr.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/rbf.cpp b/src/util/rbf.cpp
index d520a9606..06d63557b 100644
--- a/src/util/rbf.cpp
+++ b/src/util/rbf.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/rbf.h b/src/util/rbf.h
index d3ef11062..59c51698c 100644
--- a/src/util/rbf.h
+++ b/src/util/rbf.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/strencodings.cpp b/src/util/strencodings.cpp
index 0acbb4f11..69df59748 100644
--- a/src/util/strencodings.cpp
+++ b/src/util/strencodings.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/strencodings.h b/src/util/strencodings.h
index 7c4364a08..5257edccb 100644
--- a/src/util/strencodings.h
+++ b/src/util/strencodings.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/system.cpp b/src/util/system.cpp
index 6925bda4e..aead1287d 100644
--- a/src/util/system.cpp
+++ b/src/util/system.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -69,7 +69,7 @@
 // Application startup time (used for uptime calculation)
 const int64_t nStartupTime = GetTime();
 
-const char * const BITCOIN_CONF_FILENAME = "bitcoin.conf";
+const char * const BITCOIN_CONF_FILENAME = "quasarappcoin.conf";
 
 ArgsManager gArgs;
 
@@ -661,7 +661,7 @@ static std::string FormatException(const std::exception* pex, const char* pszThr
     char pszModule[MAX_PATH] = "";
     GetModuleFileNameA(nullptr, pszModule, sizeof(pszModule));
 #else
-    const char* pszModule = "bitcoin";
+    const char* pszModule = "quasarappcoin";
 #endif
     if (pex)
         return strprintf(
@@ -680,13 +680,13 @@ void PrintExceptionContinue(const std::exception* pex, const char* pszThread)
 
 fs::path GetDefaultDataDir()
 {
-    // Windows < Vista: C:\Documents and Settings\Username\Application Data\Bitcoin
-    // Windows >= Vista: C:\Users\Username\AppData\Roaming\Bitcoin
-    // Mac: ~/Library/Application Support/Bitcoin
-    // Unix: ~/.bitcoin
+    // Windows < Vista: C:\Documents and Settings\Username\Application Data\QuasarAppcoin
+    // Windows >= Vista: C:\Users\Username\AppData\Roaming\QuasarAppcoin
+    // Mac: ~/Library/Application Support/QuasarAppcoin
+    // Unix: ~/.quasarappcoin
 #ifdef WIN32
     // Windows
-    return GetSpecialFolderPath(CSIDL_APPDATA) / "Bitcoin";
+    return GetSpecialFolderPath(CSIDL_APPDATA) / "QuasarAppcoin";
 #else
     fs::path pathRet;
     char* pszHome = getenv("HOME");
@@ -696,10 +696,10 @@ fs::path GetDefaultDataDir()
         pathRet = fs::path(pszHome);
 #ifdef MAC_OSX
     // Mac
-    return pathRet / "Library/Application Support/Bitcoin";
+    return pathRet / "Library/Application Support/QuasarAppcoin";
 #else
     // Unix
-    return pathRet / ".bitcoin";
+    return pathRet / ".quasarappcoin";
 #endif
 #endif
 }
@@ -1192,9 +1192,9 @@ std::string CopyrightHolders(const std::string& strPrefix)
 {
     std::string strCopyrightHolders = strPrefix + strprintf(_(COPYRIGHT_HOLDERS), _(COPYRIGHT_HOLDERS_SUBSTITUTION));
 
-    // Check for untranslated substitution to make sure Bitcoin Core copyright is not removed by accident
-    if (strprintf(COPYRIGHT_HOLDERS, COPYRIGHT_HOLDERS_SUBSTITUTION).find("Bitcoin Core") == std::string::npos) {
-        strCopyrightHolders += "\n" + strPrefix + "The Bitcoin Core developers";
+    // Check for untranslated substitution to make sure QuasarAppcoin Core copyright is not removed by accident
+    if (strprintf(COPYRIGHT_HOLDERS, COPYRIGHT_HOLDERS_SUBSTITUTION).find("QuasarAppcoin Core") == std::string::npos) {
+        strCopyrightHolders += "\n" + strPrefix + "The QuasarAppcoin Core developers";
     }
     return strCopyrightHolders;
 }
diff --git a/src/util/system.h b/src/util/system.h
index 1a83cb67b..f97722c96 100644
--- a/src/util/system.h
+++ b/src/util/system.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/threadnames.cpp b/src/util/threadnames.cpp
index 7b0d744ae..eaa1eef4a 100644
--- a/src/util/threadnames.cpp
+++ b/src/util/threadnames.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -52,6 +52,6 @@ static void SetInternalName(std::string name) { }
 
 void util::ThreadRename(std::string&& name)
 {
-    SetThreadName(("bitcoin-" + name).c_str());
+    SetThreadName(("quasarappcoin-" + name).c_str());
     SetInternalName(std::move(name));
 }
diff --git a/src/util/threadnames.h b/src/util/threadnames.h
index aaf07b9bf..3f72dfaf4 100644
--- a/src/util/threadnames.h
+++ b/src/util/threadnames.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/time.cpp b/src/util/time.cpp
index c0ede9870..6db970530 100644
--- a/src/util/time.cpp
+++ b/src/util/time.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/time.h b/src/util/time.h
index 68de1c156..5f6fa2628 100644
--- a/src/util/time.h
+++ b/src/util/time.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/url.cpp b/src/util/url.cpp
index 49eacbf2d..f383ed89e 100644
--- a/src/util/url.cpp
+++ b/src/util/url.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/url.h b/src/util/url.h
index 3d7315a33..eb0ee1778 100644
--- a/src/util/url.h
+++ b/src/util/url.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/validation.cpp b/src/util/validation.cpp
index fe1f5a277..b7eef730c 100644
--- a/src/util/validation.cpp
+++ b/src/util/validation.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -17,4 +17,4 @@ std::string FormatStateMessage(const CValidationState &state)
         state.GetRejectCode());
 }
 
-const std::string strMessageMagic = "Bitcoin Signed Message:\n";
+const std::string strMessageMagic = "QuasarAppcoin Signed Message:\n";
diff --git a/src/util/validation.h b/src/util/validation.h
index 32559853e..f3ed0dae7 100644
--- a/src/util/validation.h
+++ b/src/util/validation.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/validation.cpp b/src/validation.cpp
index 1da79e09f..9e9e182ed 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -54,7 +54,7 @@
 #include <boost/thread.hpp>
 
 #if defined(NDEBUG)
-# error "Bitcoin cannot be compiled without assertions."
+# error "QuasarAppcoin cannot be compiled without assertions."
 #endif
 
 #define MICRO 0.000001
diff --git a/src/validation.h b/src/validation.h
index 7ab6adaf3..bf21be1de 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/validationinterface.cpp b/src/validationinterface.cpp
index 5d0ee1d1f..ba05b4a30 100644
--- a/src/validationinterface.cpp
+++ b/src/validationinterface.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/validationinterface.h b/src/validationinterface.h
index ea1b2e7e7..bd4e96be9 100644
--- a/src/validationinterface.h
+++ b/src/validationinterface.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/version.h b/src/version.h
index d932b512d..1fb1c4bca 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2018 The Bitcoin Core developers
+// Copyright (c) 2012-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/versionbits.cpp b/src/versionbits.cpp
index 3f297c0eb..211bad73b 100644
--- a/src/versionbits.cpp
+++ b/src/versionbits.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/versionbits.h b/src/versionbits.h
index cdc947cd9..fc792ab7d 100644
--- a/src/versionbits.h
+++ b/src/versionbits.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/versionbitsinfo.cpp b/src/versionbitsinfo.cpp
index ecf348292..23bbaf0a8 100644
--- a/src/versionbitsinfo.cpp
+++ b/src/versionbitsinfo.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/versionbitsinfo.h b/src/versionbitsinfo.h
index a7822bc74..077876bab 100644
--- a/src/versionbitsinfo.h
+++ b/src/versionbitsinfo.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/coincontrol.cpp b/src/wallet/coincontrol.cpp
index 87d2c4f06..b6338ae86 100644
--- a/src/wallet/coincontrol.cpp
+++ b/src/wallet/coincontrol.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/coincontrol.h b/src/wallet/coincontrol.h
index 9257b272b..03d0c7122 100644
--- a/src/wallet/coincontrol.h
+++ b/src/wallet/coincontrol.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
+// Copyright (c) 2011-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/coinselection.cpp b/src/wallet/coinselection.cpp
index 8a37f374a..a32756dba 100644
--- a/src/wallet/coinselection.cpp
+++ b/src/wallet/coinselection.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/coinselection.h b/src/wallet/coinselection.h
index 5348401f4..8fd98800c 100644
--- a/src/wallet/coinselection.h
+++ b/src/wallet/coinselection.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/crypter.cpp b/src/wallet/crypter.cpp
index a255177e3..0999df1d1 100644
--- a/src/wallet/crypter.cpp
+++ b/src/wallet/crypter.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/crypter.h b/src/wallet/crypter.h
index 8e195ca8f..d7d9ff257 100644
--- a/src/wallet/crypter.h
+++ b/src/wallet/crypter.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/db.cpp b/src/wallet/db.cpp
index 6a326bfd9..85cb3e51e 100644
--- a/src/wallet/db.cpp
+++ b/src/wallet/db.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -28,7 +28,7 @@ namespace {
 //!
 //! BerkeleyDB generates unique fileids by default
 //! (https://docs.oracle.com/cd/E17275_01/html/programmer_reference/program_copy.html),
-//! so bitcoin should never create different databases with the same fileid, but
+//! so quasarappcoin should never create different databases with the same fileid, but
 //! this error can be triggered if users manually copy database files.
 void CheckUniqueFileid(const BerkeleyEnvironment& env, const std::string& filename, Db& db, WalletDatabaseFileId& fileid)
 {
@@ -177,7 +177,7 @@ bool BerkeleyEnvironment::Open(bool retry)
     fs::path pathIn = strPath;
     TryCreateDirectories(pathIn);
     if (!LockDirectory(pathIn, ".walletlock")) {
-        LogPrintf("Cannot obtain a lock on wallet directory %s. Another instance of bitcoin may be using it.\n", strPath);
+        LogPrintf("Cannot obtain a lock on wallet directory %s. Another instance of quasarappcoin may be using it.\n", strPath);
         return false;
     }
 
@@ -575,7 +575,7 @@ BerkeleyBatch::BerkeleyBatch(BerkeleyDatabase& database, const char* pszMode, bo
             // files in the same environment have the same fileid.
             //
             // Also call CheckUniqueFileid on all the other g_dbenvs to prevent
-            // bitcoin from opening the same data file through another
+            // quasarappcoin from opening the same data file through another
             // environment when the file is referenced through equivalent but
             // not obviously identical symlinked or hard linked or bind mounted
             // paths. In the future a more relaxed check for equal inode and
diff --git a/src/wallet/db.h b/src/wallet/db.h
index 762fb83a2..5ed8050fb 100644
--- a/src/wallet/db.h
+++ b/src/wallet/db.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/feebumper.cpp b/src/wallet/feebumper.cpp
index 78db4df5e..05cd3b7ba 100644
--- a/src/wallet/feebumper.cpp
+++ b/src/wallet/feebumper.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/feebumper.h b/src/wallet/feebumper.h
index f9cbfc5f6..cb21169e2 100644
--- a/src/wallet/feebumper.h
+++ b/src/wallet/feebumper.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/fees.cpp b/src/wallet/fees.cpp
index d9ae18ed6..e8fd94307 100644
--- a/src/wallet/fees.cpp
+++ b/src/wallet/fees.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/fees.h b/src/wallet/fees.h
index 434f211dc..b868c815f 100644
--- a/src/wallet/fees.h
+++ b/src/wallet/fees.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/init.cpp b/src/wallet/init.cpp
index 47ef01bfd..8ce525784 100644
--- a/src/wallet/init.cpp
+++ b/src/wallet/init.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/load.cpp b/src/wallet/load.cpp
index 79c5f439d..2c3c7136e 100644
--- a/src/wallet/load.cpp
+++ b/src/wallet/load.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/load.h b/src/wallet/load.h
index 9bb6f2166..110ae96c9 100644
--- a/src/wallet/load.h
+++ b/src/wallet/load.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/psbtwallet.cpp b/src/wallet/psbtwallet.cpp
index 1b17b0976..38349dbcd 100644
--- a/src/wallet/psbtwallet.cpp
+++ b/src/wallet/psbtwallet.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/psbtwallet.h b/src/wallet/psbtwallet.h
index a24a0967d..4ff871b32 100644
--- a/src/wallet/psbtwallet.h
+++ b/src/wallet/psbtwallet.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/rpcdump.cpp b/src/wallet/rpcdump.cpp
index c339e111b..a89f175e3 100644
--- a/src/wallet/rpcdump.cpp
+++ b/src/wallet/rpcdump.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -288,7 +288,7 @@ UniValue importaddress(const JSONRPCRequest& request)
             "\nNote: If you import a non-standard raw script in hex form, outputs sending to it will be treated\n"
             "as change, and not show up in many RPCs.\n",
                 {
-                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The Bitcoin address (or hex-encoded script)"},
+                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The QuasarAppcoin address (or hex-encoded script)"},
                     {"label", RPCArg::Type::STR, /* default */ "\"\"", "An optional label"},
                     {"rescan", RPCArg::Type::BOOL, /* default */ "true", "Rescan the wallet for transactions"},
                     {"p2sh", RPCArg::Type::BOOL, /* default */ "false", "Add the P2SH version of the script as well"},
@@ -342,7 +342,7 @@ UniValue importaddress(const JSONRPCRequest& request)
             std::vector<unsigned char> data(ParseHex(request.params[0].get_str()));
             ImportScript(pwallet, CScript(data.begin(), data.end()), strLabel, fP2SH);
         } else {
-            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address or script");
+            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid QuasarAppcoin address or script");
         }
     }
     if (fRescan)
@@ -722,7 +722,7 @@ UniValue dumpprivkey(const JSONRPCRequest& request)
                 "\nReveals the private key corresponding to 'address'.\n"
                 "Then the importprivkey can be used with this output\n",
                 {
-                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address for the private key"},
+                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The quasarappcoin address for the private key"},
                 },
                 RPCResult{
             "\"key\"                (string) The private key\n"
@@ -742,7 +742,7 @@ UniValue dumpprivkey(const JSONRPCRequest& request)
     std::string strAddress = request.params[0].get_str();
     CTxDestination dest = DecodeDestination(strAddress);
     if (!IsValidDestination(dest)) {
-        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
+        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid QuasarAppcoin address");
     }
     auto keyid = GetKeyForDestination(*pwallet, dest);
     if (keyid.IsNull()) {
@@ -795,7 +795,7 @@ UniValue dumpwallet(const JSONRPCRequest& request)
 
     /* Prevent arbitrary files from being overwritten. There have been reports
      * that users have overwritten wallet files this way:
-     * https://github.com/bitcoin/bitcoin/issues/9934
+     * https://github.com/quasarappcoin/quasarappcoin/issues/9934
      * It may also avoid other security issues.
      */
     if (fs::exists(filepath)) {
@@ -825,7 +825,7 @@ UniValue dumpwallet(const JSONRPCRequest& request)
     std::sort(vKeyBirth.begin(), vKeyBirth.end());
 
     // produce output
-    file << strprintf("# Wallet dump created by Bitcoin %s\n", CLIENT_BUILD);
+    file << strprintf("# Wallet dump created by QuasarAppcoin %s\n", CLIENT_BUILD);
     file << strprintf("# * Created on %s\n", FormatISO8601DateTime(GetTime()));
     const Optional<int> tip_height = locked_chain->getHeight();
     file << strprintf("# * Best block at time of backup was %i (%s),\n", tip_height.get_value_or(-1), tip_height ? locked_chain->getBlockHash(*tip_height).ToString() : "(missing block hash)");
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 5a22508c4..d90262ad4 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -157,7 +157,7 @@ static UniValue getnewaddress(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() > 2)
         throw std::runtime_error(
             RPCHelpMan{"getnewaddress",
-                "\nReturns a new Bitcoin address for receiving payments.\n"
+                "\nReturns a new QuasarAppcoin address for receiving payments.\n"
                 "If 'label' is specified, it is added to the address book \n"
                 "so payments received with the address will be associated with 'label'.\n",
                 {
@@ -165,7 +165,7 @@ static UniValue getnewaddress(const JSONRPCRequest& request)
                     {"address_type", RPCArg::Type::STR, /* default */ "set by -addresstype", "The address type to use. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\"."},
                 },
                 RPCResult{
-            "\"address\"    (string) The new bitcoin address\n"
+            "\"address\"    (string) The new quasarappcoin address\n"
                 },
                 RPCExamples{
                     HelpExampleCli("getnewaddress", "")
@@ -220,7 +220,7 @@ static UniValue getrawchangeaddress(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() > 1)
         throw std::runtime_error(
             RPCHelpMan{"getrawchangeaddress",
-                "\nReturns a new Bitcoin address, for receiving change.\n"
+                "\nReturns a new QuasarAppcoin address, for receiving change.\n"
                 "This is for use with raw transactions, NOT normal use.\n",
                 {
                     {"address_type", RPCArg::Type::STR, /* default */ "set by -changetype", "The address type to use. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\"."},
@@ -279,7 +279,7 @@ static UniValue setlabel(const JSONRPCRequest& request)
             RPCHelpMan{"setlabel",
                 "\nSets the label associated with the given address.\n",
                 {
-                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address to be associated with a label."},
+                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The quasarappcoin address to be associated with a label."},
                     {"label", RPCArg::Type::STR, RPCArg::Optional::NO, "The label to assign to the address."},
                 },
                 RPCResults{},
@@ -293,7 +293,7 @@ static UniValue setlabel(const JSONRPCRequest& request)
 
     CTxDestination dest = DecodeDestination(request.params[0].get_str());
     if (!IsValidDestination(dest)) {
-        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
+        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid QuasarAppcoin address");
     }
 
     std::string label = LabelFromValue(request.params[1]);
@@ -323,7 +323,7 @@ static CTransactionRef SendMoney(interfaces::Chain::Lock& locked_chain, CWallet
         throw JSONRPCError(RPC_CLIENT_P2P_DISABLED, "Error: Peer-to-peer functionality missing or disabled");
     }
 
-    // Parse Bitcoin address
+    // Parse QuasarAppcoin address
     CScript scriptPubKey = GetScriptForDestination(address);
 
     // Create and send the transaction
@@ -363,7 +363,7 @@ static UniValue sendtoaddress(const JSONRPCRequest& request)
                 "\nSend an amount to a given address." +
                     HelpRequiringPassphrase(pwallet) + "\n",
                 {
-                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address to send to."},
+                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The quasarappcoin address to send to."},
                     {"amount", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "The amount in " + CURRENCY_UNIT + " to send. eg 0.1"},
                     {"comment", RPCArg::Type::STR, RPCArg::Optional::OMITTED_NAMED_ARG, "A comment used to store what the transaction is for.\n"
             "                             This is not part of the transaction, just kept in your wallet."},
@@ -461,7 +461,7 @@ static UniValue listaddressgroupings(const JSONRPCRequest& request)
             "[\n"
             "  [\n"
             "    [\n"
-            "      \"address\",            (string) The bitcoin address\n"
+            "      \"address\",            (string) The quasarappcoin address\n"
             "      amount,                 (numeric) The amount in " + CURRENCY_UNIT + "\n"
             "      \"label\"               (string, optional) The label\n"
             "    ]\n"
@@ -519,7 +519,7 @@ static UniValue signmessage(const JSONRPCRequest& request)
                 "\nSign a message with the private key of an address" +
                     HelpRequiringPassphrase(pwallet) + "\n",
                 {
-                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address to use for the private key."},
+                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The quasarappcoin address to use for the private key."},
                     {"message", RPCArg::Type::STR, RPCArg::Optional::NO, "The message to create a signature of."},
                 },
                 RPCResult{
@@ -585,7 +585,7 @@ static UniValue getreceivedbyaddress(const JSONRPCRequest& request)
             RPCHelpMan{"getreceivedbyaddress",
                 "\nReturns the total amount received by the given address in transactions with at least minconf confirmations.\n",
                 {
-                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address for transactions."},
+                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The quasarappcoin address for transactions."},
                     {"minconf", RPCArg::Type::NUM, /* default */ "1", "Only include transactions confirmed at least this many times."},
                 },
                 RPCResult{
@@ -610,10 +610,10 @@ static UniValue getreceivedbyaddress(const JSONRPCRequest& request)
     auto locked_chain = pwallet->chain().lock();
     LOCK(pwallet->cs_wallet);
 
-    // Bitcoin address
+    // QuasarAppcoin address
     CTxDestination dest = DecodeDestination(request.params[0].get_str());
     if (!IsValidDestination(dest)) {
-        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
+        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid QuasarAppcoin address");
     }
     CScript scriptPubKey = GetScriptForDestination(dest);
     if (!IsMine(*pwallet, scriptPubKey)) {
@@ -818,7 +818,7 @@ static UniValue sendmany(const JSONRPCRequest& request)
                     {"dummy", RPCArg::Type::STR, RPCArg::Optional::NO, "Must be set to \"\" for backwards compatibility.", "\"\""},
                     {"amounts", RPCArg::Type::OBJ, RPCArg::Optional::NO, "A json object with addresses and amounts",
                         {
-                            {"address", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "The bitcoin address is the key, the numeric amount (can be string) in " + CURRENCY_UNIT + " is the value"},
+                            {"address", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "The quasarappcoin address is the key, the numeric amount (can be string) in " + CURRENCY_UNIT + " is the value"},
                         },
                     },
                     {"minconf", RPCArg::Type::NUM, RPCArg::Optional::OMITTED_NAMED_ARG, "Ignored dummy value"},
@@ -904,7 +904,7 @@ static UniValue sendmany(const JSONRPCRequest& request)
     for (const std::string& name_ : keys) {
         CTxDestination dest = DecodeDestination(name_);
         if (!IsValidDestination(dest)) {
-            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ") + name_);
+            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid QuasarAppcoin address: ") + name_);
         }
 
         if (destinations.count(dest)) {
@@ -964,15 +964,15 @@ static UniValue addmultisigaddress(const JSONRPCRequest& request)
         std::string msg =
             RPCHelpMan{"addmultisigaddress",
                 "\nAdd a nrequired-to-sign multisignature address to the wallet. Requires a new wallet backup.\n"
-                "Each key is a Bitcoin address or hex-encoded public key.\n"
+                "Each key is a QuasarAppcoin address or hex-encoded public key.\n"
                 "This functionality is only intended for use with non-watchonly addresses.\n"
                 "See `importaddress` for watchonly p2sh address support.\n"
                 "If 'label' is specified, assign address to that label.\n",
                 {
                     {"nrequired", RPCArg::Type::NUM, RPCArg::Optional::NO, "The number of required signatures out of the n keys or addresses."},
-                    {"keys", RPCArg::Type::ARR, RPCArg::Optional::NO, "A json array of bitcoin addresses or hex-encoded public keys",
+                    {"keys", RPCArg::Type::ARR, RPCArg::Optional::NO, "A json array of quasarappcoin addresses or hex-encoded public keys",
                         {
-                            {"key", RPCArg::Type::STR, RPCArg::Optional::OMITTED, "bitcoin address or hex-encoded public key"},
+                            {"key", RPCArg::Type::STR, RPCArg::Optional::OMITTED, "quasarappcoin address or hex-encoded public key"},
                         },
                         },
                     {"label", RPCArg::Type::STR, RPCArg::Optional::OMITTED_NAMED_ARG, "A label to assign the addresses to."},
@@ -1405,7 +1405,7 @@ UniValue listtransactions(const JSONRPCRequest& request)
                 RPCResult{
             "[\n"
             "  {\n"
-            "    \"address\":\"address\",    (string) The bitcoin address of the transaction.\n"
+            "    \"address\":\"address\",    (string) The quasarappcoin address of the transaction.\n"
             "    \"category\":               (string) The transaction category.\n"
             "                \"send\"                  Transactions sent.\n"
             "                \"receive\"               Non-coinbase transactions received.\n"
@@ -1540,7 +1540,7 @@ static UniValue listsinceblock(const JSONRPCRequest& request)
                 RPCResult{
             "{\n"
             "  \"transactions\": [\n"
-            "    \"address\":\"address\",    (string) The bitcoin address of the transaction.\n"
+            "    \"address\":\"address\",    (string) The quasarappcoin address of the transaction.\n"
             "    \"category\":               (string) The transaction category.\n"
             "                \"send\"                  Transactions sent.\n"
             "                \"receive\"               Non-coinbase transactions received.\n"
@@ -1693,7 +1693,7 @@ static UniValue gettransaction(const JSONRPCRequest& request)
             "                                                   may be unknown for unconfirmed transactions not in the mempool\n"
             "  \"details\" : [\n"
             "    {\n"
-            "      \"address\" : \"address\",          (string) The bitcoin address involved in the transaction\n"
+            "      \"address\" : \"address\",          (string) The quasarappcoin address involved in the transaction\n"
             "      \"category\" :                      (string) The transaction category.\n"
             "                   \"send\"                  Transactions sent.\n"
             "                   \"receive\"               Non-coinbase transactions received.\n"
@@ -2108,7 +2108,7 @@ static UniValue encryptwallet(const JSONRPCRequest& request)
                 RPCExamples{
             "\nEncrypt your wallet\n"
             + HelpExampleCli("encryptwallet", "\"my pass phrase\"") +
-            "\nNow set the passphrase to use the wallet, such as for signing or sending bitcoin\n"
+            "\nNow set the passphrase to use the wallet, such as for signing or sending quasarappcoin\n"
             + HelpExampleCli("walletpassphrase", "\"my pass phrase\"") +
             "\nNow we can do something like sign\n"
             + HelpExampleCli("signmessage", "\"address\" \"test message\"") +
@@ -2683,9 +2683,9 @@ static UniValue listunspent(const JSONRPCRequest& request)
                 {
                     {"minconf", RPCArg::Type::NUM, /* default */ "1", "The minimum confirmations to filter"},
                     {"maxconf", RPCArg::Type::NUM, /* default */ "9999999", "The maximum confirmations to filter"},
-                    {"addresses", RPCArg::Type::ARR, /* default */ "empty array", "A json array of bitcoin addresses to filter",
+                    {"addresses", RPCArg::Type::ARR, /* default */ "empty array", "A json array of quasarappcoin addresses to filter",
                         {
-                            {"address", RPCArg::Type::STR, RPCArg::Optional::OMITTED, "bitcoin address"},
+                            {"address", RPCArg::Type::STR, RPCArg::Optional::OMITTED, "quasarappcoin address"},
                         },
                     },
                     {"include_unsafe", RPCArg::Type::BOOL, /* default */ "true", "Include outputs that are not safe to spend\n"
@@ -2704,7 +2704,7 @@ static UniValue listunspent(const JSONRPCRequest& request)
             "  {\n"
             "    \"txid\" : \"txid\",          (string) the transaction id \n"
             "    \"vout\" : n,               (numeric) the vout value\n"
-            "    \"address\" : \"address\",    (string) the bitcoin address\n"
+            "    \"address\" : \"address\",    (string) the quasarappcoin address\n"
             "    \"label\" : \"label\",        (string) The associated label, or \"\" for the default label\n"
             "    \"scriptPubKey\" : \"key\",   (string) the script key\n"
             "    \"amount\" : x.xxx,         (numeric) the transaction output amount in " + CURRENCY_UNIT + "\n"
@@ -2750,7 +2750,7 @@ static UniValue listunspent(const JSONRPCRequest& request)
             const UniValue& input = inputs[idx];
             CTxDestination dest = DecodeDestination(input.get_str());
             if (!IsValidDestination(dest)) {
-                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ") + input.get_str());
+                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid QuasarAppcoin address: ") + input.get_str());
             }
             if (!destinations.insert(dest).second) {
                 throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated address: ") + input.get_str());
@@ -2904,7 +2904,7 @@ void FundTransaction(CWallet* const pwallet, CMutableTransaction& tx, CAmount& f
             CTxDestination dest = DecodeDestination(options["changeAddress"].get_str());
 
             if (!IsValidDestination(dest)) {
-                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "changeAddress must be a valid bitcoin address");
+                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "changeAddress must be a valid quasarappcoin address");
             }
 
             coinControl.destChange = dest;
@@ -3009,7 +3009,7 @@ static UniValue fundrawtransaction(const JSONRPCRequest& request)
                     {"hexstring", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The hex string of the raw transaction"},
                     {"options", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED_NAMED_ARG, "for backward compatibility: passing in a true instead of an object will result in {\"includeWatching\":true}",
                         {
-                            {"changeAddress", RPCArg::Type::STR, /* default */ "pool address", "The bitcoin address to receive the change"},
+                            {"changeAddress", RPCArg::Type::STR, /* default */ "pool address", "The quasarappcoin address to receive the change"},
                             {"changePosition", RPCArg::Type::NUM, /* default */ "random", "The index of the change output"},
                             {"change_type", RPCArg::Type::STR, /* default */ "set by -changetype", "The output type to use. Only valid if changeAddress is not specified. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\"."},
                             {"includeWatching", RPCArg::Type::BOOL, /* default */ "false", "Also select inputs which are watch only"},
@@ -3539,14 +3539,14 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() != 1) {
         throw std::runtime_error(
             RPCHelpMan{"getaddressinfo",
-                "\nReturn information about the given bitcoin address. Some information requires the address\n"
+                "\nReturn information about the given quasarappcoin address. Some information requires the address\n"
                 "to be in the wallet.\n",
                 {
-                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address to get the information of."},
+                    {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The quasarappcoin address to get the information of."},
                 },
                 RPCResult{
             "{\n"
-            "  \"address\" : \"address\",        (string) The bitcoin address validated\n"
+            "  \"address\" : \"address\",        (string) The quasarappcoin address validated\n"
             "  \"scriptPubKey\" : \"hex\",       (string) The hex-encoded scriptPubKey generated by the address\n"
             "  \"ismine\" : true|false,        (boolean) If the address is yours or not\n"
             "  \"iswatchonly\" : true|false,   (boolean) If the address is watchonly\n"
@@ -3952,7 +3952,7 @@ UniValue walletcreatefundedpsbt(const JSONRPCRequest& request)
                         {
                             {"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
                                 {
-                                    {"address", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "A key-value pair. The key (string) is the bitcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT + ""},
+                                    {"address", RPCArg::Type::AMOUNT, RPCArg::Optional::NO, "A key-value pair. The key (string) is the quasarappcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT + ""},
                                 },
                                 },
                             {"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
@@ -3965,7 +3965,7 @@ UniValue walletcreatefundedpsbt(const JSONRPCRequest& request)
                     {"locktime", RPCArg::Type::NUM, /* default */ "0", "Raw locktime. Non-0 value also locktime-activates inputs"},
                     {"options", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED_NAMED_ARG, "",
                         {
-                            {"changeAddress", RPCArg::Type::STR_HEX, /* default */ "pool address", "The bitcoin address to receive the change"},
+                            {"changeAddress", RPCArg::Type::STR_HEX, /* default */ "pool address", "The quasarappcoin address to receive the change"},
                             {"changePosition", RPCArg::Type::NUM, /* default */ "random", "The index of the change output"},
                             {"change_type", RPCArg::Type::STR, /* default */ "set by -changetype", "The output type to use. Only valid if changeAddress is not specified. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\"."},
                             {"includeWatching", RPCArg::Type::BOOL, /* default */ "false", "Also select inputs which are watch only"},
diff --git a/src/wallet/rpcwallet.h b/src/wallet/rpcwallet.h
index 7cf607ccc..bf0a416f9 100644
--- a/src/wallet/rpcwallet.h
+++ b/src/wallet/rpcwallet.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/test/coinselector_tests.cpp b/src/wallet/test/coinselector_tests.cpp
index 34b9770e8..e3c6c091b 100644
--- a/src/wallet/test/coinselector_tests.cpp
+++ b/src/wallet/test/coinselector_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/test/db_tests.cpp b/src/wallet/test/db_tests.cpp
index d9b07af32..79009f8f7 100644
--- a/src/wallet/test/db_tests.cpp
+++ b/src/wallet/test/db_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/test/init_test_fixture.cpp b/src/wallet/test/init_test_fixture.cpp
index 3b828d57f..716f15d18 100644
--- a/src/wallet/test/init_test_fixture.cpp
+++ b/src/wallet/test/init_test_fixture.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/test/init_test_fixture.h b/src/wallet/test/init_test_fixture.h
index 0f2d9fbd3..d372146c4 100644
--- a/src/wallet/test/init_test_fixture.h
+++ b/src/wallet/test/init_test_fixture.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/test/init_tests.cpp b/src/wallet/test/init_tests.cpp
index e1c53c83e..6d5673514 100644
--- a/src/wallet/test/init_tests.cpp
+++ b/src/wallet/test/init_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/test/psbt_wallet_tests.cpp b/src/wallet/test/psbt_wallet_tests.cpp
index f774cb4ad..98f005563 100644
--- a/src/wallet/test/psbt_wallet_tests.cpp
+++ b/src/wallet/test/psbt_wallet_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/test/wallet_crypto_tests.cpp b/src/wallet/test/wallet_crypto_tests.cpp
index acc61c984..04d38e10e 100644
--- a/src/wallet/test/wallet_crypto_tests.cpp
+++ b/src/wallet/test/wallet_crypto_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/test/wallet_test_fixture.cpp b/src/wallet/test/wallet_test_fixture.cpp
index 6526e69ee..b894648b0 100644
--- a/src/wallet/test/wallet_test_fixture.cpp
+++ b/src/wallet/test/wallet_test_fixture.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/test/wallet_test_fixture.h b/src/wallet/test/wallet_test_fixture.h
index 1017e6170..2f462b6f2 100644
--- a/src/wallet/test/wallet_test_fixture.h
+++ b/src/wallet/test/wallet_test_fixture.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/test/wallet_tests.cpp b/src/wallet/test/wallet_tests.cpp
index 3cdbde33c..16f530538 100644
--- a/src/wallet/test/wallet_tests.cpp
+++ b/src/wallet/test/wallet_tests.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2019 The Bitcoin Core developers
+// Copyright (c) 2012-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 071ae23e1..46728ef7b 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -1802,7 +1802,7 @@ CWallet::ScanResult CWallet::ScanForWalletTransactions(const uint256& start_bloc
                 // Abort scan if current block is no longer active, to prevent
                 // marking transactions as coming from the wrong block.
                 // TODO: This should return success instead of failure, see
-                // https://github.com/bitcoin/bitcoin/pull/14711#issuecomment-458342518
+                // https://github.com/quasarappcoin/quasarappcoin/pull/14711#issuecomment-458342518
                 result.last_failed_block = block_hash;
                 result.status = ScanResult::FAILURE;
                 break;
@@ -2689,7 +2689,7 @@ bool CWallet::CreateTransaction(interfaces::Chain::Lock& locked_chain, const std
 
             // Create change script that will be used if we need change
             // TODO: pass in scriptChange instead of reservekey so
-            // change transaction isn't always pay-to-bitcoin-address
+            // change transaction isn't always pay-to-quasarappcoin-address
             CScript scriptChange;
 
             // coin control: send change to custom address
@@ -3776,7 +3776,7 @@ void CWallet::GetKeyBirthTimes(interfaces::Chain::Lock& locked_chain, std::map<C
  *
  * For more information see CWalletTx::nTimeSmart,
  * https://bitcointalk.org/?topic=54527, or
- * https://github.com/bitcoin/bitcoin/pull/1393.
+ * https://github.com/quasarappcoin/quasarappcoin/pull/1393.
  */
 unsigned int CWallet::ComputeTimeSmart(const CWalletTx& wtx) const
 {
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 510f4b8c0..c9ce2a2f9 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -134,7 +134,7 @@ enum WalletFlags : uint64_t {
     //! initialization that should only happen on first run.
     //!
     //! This flag is also a mandatory flag to prevent previous versions of
-    //! bitcoin from opening the wallet, thinking it was newly created, and
+    //! quasarappcoin from opening the wallet, thinking it was newly created, and
     //! then improperly reinitializing it.
     WALLET_FLAG_BLANK_WALLET = (1ULL << 33),
 };
@@ -367,7 +367,7 @@ public:
     unsigned int nTimeSmart;
     /**
      * From me flag is set to 1 for transactions that were created by the wallet
-     * on this bitcoin node, and set to 0 for transactions that were created
+     * on this quasarappcoin node, and set to 0 for transactions that were created
      * externally and came in through the network or sendrawtransaction RPC.
      */
     char fFromMe;
diff --git a/src/wallet/walletdb.cpp b/src/wallet/walletdb.cpp
index 3122cd6fa..e24dafe9e 100644
--- a/src/wallet/walletdb.cpp
+++ b/src/wallet/walletdb.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/walletdb.h b/src/wallet/walletdb.h
index 0532a55ff..04501876e 100644
--- a/src/wallet/walletdb.h
+++ b/src/wallet/walletdb.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/wallettool.cpp b/src/wallet/wallettool.cpp
index 1ff1e8b84..5077db810 100644
--- a/src/wallet/wallettool.cpp
+++ b/src/wallet/wallettool.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -11,7 +11,7 @@
 namespace WalletTool {
 
 // The standard wallet deleter function blocks on the validation interface
-// queue, which doesn't exist for the bitcoin-wallet. Define our own
+// queue, which doesn't exist for the quasarappcoin-wallet. Define our own
 // deleter here.
 static void WalletToolReleaseWallet(CWallet* wallet)
 {
diff --git a/src/wallet/wallettool.h b/src/wallet/wallettool.h
index 5b06fd179..47e46dce5 100644
--- a/src/wallet/wallettool.h
+++ b/src/wallet/wallettool.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2018 The Bitcoin Core developers
+// Copyright (c) 2016-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/wallet/walletutil.cpp b/src/wallet/walletutil.cpp
index b227a1555..d69729121 100644
--- a/src/wallet/walletutil.cpp
+++ b/src/wallet/walletutil.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -80,7 +80,7 @@ std::vector<fs::path> ListWalletDir()
                 // as a wallet.
                 paths.emplace_back();
             } else {
-                // Found top-level btree file not called wallet.dat. Current bitcoin
+                // Found top-level btree file not called wallet.dat. Current quasarappcoin
                 // software will never create these files but will allow them to be
                 // opened in a shared database environment for backwards compatibility.
                 // Add it to the list of available wallets.
diff --git a/src/wallet/walletutil.h b/src/wallet/walletutil.h
index ba2f91384..e77cc6d8e 100644
--- a/src/wallet/walletutil.h
+++ b/src/wallet/walletutil.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/walletinitinterface.h b/src/walletinitinterface.h
index 22aca6599..dd1987305 100644
--- a/src/walletinitinterface.h
+++ b/src/walletinitinterface.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2018 The Bitcoin Core developers
+// Copyright (c) 2017-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/warnings.cpp b/src/warnings.cpp
index 1c6ba13f6..cf23cd6a7 100644
--- a/src/warnings.cpp
+++ b/src/warnings.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/warnings.h b/src/warnings.h
index 16c8f7b52..9f358fcca 100644
--- a/src/warnings.h
+++ b/src/warnings.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/zmq/zmqabstractnotifier.cpp b/src/zmq/zmqabstractnotifier.cpp
index 6a9661e3e..920e2bc38 100644
--- a/src/zmq/zmqabstractnotifier.cpp
+++ b/src/zmq/zmqabstractnotifier.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/zmq/zmqabstractnotifier.h b/src/zmq/zmqabstractnotifier.h
index 887dde7b2..9c682aa56 100644
--- a/src/zmq/zmqabstractnotifier.h
+++ b/src/zmq/zmqabstractnotifier.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/zmq/zmqconfig.h b/src/zmq/zmqconfig.h
index 5219ffad4..ab31ad7c2 100644
--- a/src/zmq/zmqconfig.h
+++ b/src/zmq/zmqconfig.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2014-2018 The Bitcoin Core developers
+// Copyright (c) 2014-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/zmq/zmqnotificationinterface.cpp b/src/zmq/zmqnotificationinterface.cpp
index 6826cf62d..e73073e04 100644
--- a/src/zmq/zmqnotificationinterface.cpp
+++ b/src/zmq/zmqnotificationinterface.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/zmq/zmqnotificationinterface.h b/src/zmq/zmqnotificationinterface.h
index a0cc26a16..02dccd67f 100644
--- a/src/zmq/zmqnotificationinterface.h
+++ b/src/zmq/zmqnotificationinterface.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/zmq/zmqpublishnotifier.cpp b/src/zmq/zmqpublishnotifier.cpp
index ba89d1401..f5fdf7644 100644
--- a/src/zmq/zmqpublishnotifier.cpp
+++ b/src/zmq/zmqpublishnotifier.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/zmq/zmqpublishnotifier.h b/src/zmq/zmqpublishnotifier.h
index 278fdb94d..c8e7fc807 100644
--- a/src/zmq/zmqpublishnotifier.h
+++ b/src/zmq/zmqpublishnotifier.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018 The Bitcoin Core developers
+// Copyright (c) 2015-2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/zmq/zmqrpc.cpp b/src/zmq/zmqrpc.cpp
index a34968ef7..426269ccf 100644
--- a/src/zmq/zmqrpc.cpp
+++ b/src/zmq/zmqrpc.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/zmq/zmqrpc.h b/src/zmq/zmqrpc.h
index 5a810a16f..86ad0b6fc 100644
--- a/src/zmq/zmqrpc.h
+++ b/src/zmq/zmqrpc.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2018 The Bitcoin Core developers
+// Copyright (c) 2018 The QuasarAppcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.