Chainparams: Introduce CreateGenesisBlock() static function

Author: jtimon

src/chainparams.cpp

@@ -16,6 +16,45 @@ using namespace std;
 
 #include "chainparamsseeds.h"
 
+static CBlock CreateGenesisBlock(const char* pszTimestamp, CScript genesisOutputScript, uint32_t nTime=1231006505, uint32_t nNonce=2083236893, uint32_t nBits=0x1d00ffff, int32_t nVersion=1, const CAmount& genesisReward=50 * COIN)
+{
+    CMutableTransaction txNew;
+    txNew.nVersion = 1;
+    txNew.vin.resize(1);
+    txNew.vout.resize(1);
+    txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
+    txNew.vout[0].nValue = genesisReward;
+    txNew.vout[0].scriptPubKey = genesisOutputScript;
+
+    CBlock genesis;
+    genesis.nTime    = nTime;
+    genesis.nBits    = nBits;
+    genesis.nNonce   = nNonce;
+    genesis.nVersion = nVersion;
+    genesis.vtx.push_back(txNew);
+    genesis.hashPrevBlock.SetNull();
+    genesis.hashMerkleRoot = genesis.BuildMerkleTree();
+    return genesis;
+}
+
+/**
+ * Build the genesis block. Note that the output of its generation
+ * transaction cannot be spent since it did not originally exist in the
+ * database.
+ *
+ * CBlock(hash=000000000019d6, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=4a5e1e, nTime=1231006505, nBits=1d00ffff, nNonce=2083236893, vtx=1)
+ *   CTransaction(hash=4a5e1e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
+ *     CTxIn(COutPoint(000000, -1), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
+ *     CTxOut(nValue=50.00000000, scriptPubKey=0x5F1DF16B2B704C8A578D0B)
+ *   vMerkleTree: 4a5e1e
+ */
+static CBlock CreateGenesisBlock(uint32_t nTime=1231006505, uint32_t nNonce=2083236893, uint32_t nBits=0x1d00ffff, int32_t nVersion=1, const CAmount& genesisReward=50 * COIN)
+{
+    const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
+    CScript genesisOutputScript = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
+    return CreateGenesisBlock(pszTimestamp, genesisOutputScript, nTime, nNonce, nBits, nVersion, genesisReward);
+}
+
 /**
  * Main network
  */
@@ -52,33 +91,7 @@ class CMainParams : public CChainParams {
         nDefaultPort = 8333;
         nPruneAfterHeight = 100000;
 
-        /**
-         * Build the genesis block. Note that the output of its generation
-         * transaction cannot be spent since it did not originally exist in the
-         * database.
-         *
-         * CBlock(hash=000000000019d6, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=4a5e1e, nTime=1231006505, nBits=1d00ffff, nNonce=2083236893, vtx=1)
-         *   CTransaction(hash=4a5e1e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
-         *     CTxIn(COutPoint(000000, -1), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
-         *     CTxOut(nValue=50.00000000, scriptPubKey=0x5F1DF16B2B704C8A578D0B)
-         *   vMerkleTree: 4a5e1e
-         */
-        const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
-        CMutableTransaction txNew;
-        txNew.nVersion = 1;
-        txNew.vin.resize(1);
-        txNew.vout.resize(1);
-        txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
-        txNew.vout[0].nValue = 50 * COIN;
-        txNew.vout[0].scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
-        genesis.vtx.push_back(txNew);
-        genesis.hashPrevBlock.SetNull();
-        genesis.hashMerkleRoot = genesis.BuildMerkleTree();
-        genesis.nVersion = 1;
-        genesis.nTime    = 1231006505;
-        genesis.nBits    = 0x1d00ffff;
-        genesis.nNonce   = 2083236893;
-
+        genesis = CreateGenesisBlock();
         consensus.hashGenesisBlock = genesis.GetHash();
         assert(consensus.hashGenesisBlock == uint256S("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"));
         assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));