Cache transaction validation successes

Conflicts:
	src/main.cpp
	src/test/test_bitcoin.cpp

Github-Pull: #6077
Rebased-From: 17b11428c135203342aff38cabc8047e673f38ac 517e6dd25618522c716e64859554b0f29c6e65d0

src/test/test_bitcoin.h

@@ -1,6 +1,8 @@
 #ifndef BITCOIN_TEST_TEST_BITCOIN_H
 #define BITCOIN_TEST_TEST_BITCOIN_H
 
+#include "chainparamsbase.h"
+#include "key.h"
 #include "txdb.h"
 
 #include <boost/filesystem.hpp>
@@ -10,7 +12,7 @@
  * This just configures logging and chain parameters.
  */
 struct BasicTestingSetup {
-    BasicTestingSetup();
+    BasicTestingSetup(CBaseChainParams::Network network = CBaseChainParams::MAIN);
     ~BasicTestingSetup();
 };
 
@@ -23,8 +25,30 @@ struct TestingSetup: public BasicTestingSetup {
     boost::filesystem::path pathTemp;
     boost::thread_group threadGroup;
 
-    TestingSetup();
+    TestingSetup(CBaseChainParams::Network network = CBaseChainParams::MAIN);
     ~TestingSetup();
 };
 
+class CBlock;
+struct CMutableTransaction;
+class CScript;
+
+//
+// Testing fixture that pre-creates a
+// 100-block REGTEST-mode block chain
+//
+struct TestChain100Setup : public TestingSetup {
+    TestChain100Setup();
+
+    // Create a new block with just given transactions, coinbase paying to
+    // scriptPubKey, and try to add it to the current chain.
+    CBlock CreateAndProcessBlock(const std::vector<CMutableTransaction>& txns,
+                                 const CScript& scriptPubKey);
+
+    ~TestChain100Setup();
+
+    std::vector<CTransaction> coinbaseTxns; // For convenience, coinbase transactions
+    CKey coinbaseKey; // private/public key needed to spend coinbase transactions
+};
+
 #endif