HF: Genesis block includes fedpegscript

Author: instagibbs

src/chainparams.cpp

@@ -10,13 +10,26 @@
 #include "util.h"
 #include "utilstrencodings.h"
 #include "amount.h"
+#include "crypto/ripemd160.h"
 
 #include <assert.h>
 
 #include <boost/assign/list_of.hpp>
 
 #include "chainparamsseeds.h"
 
+// Safer for users if they load incorrect parameters via arguments.
+static std::vector<unsigned char> CommitToArguments(const Consensus::Params& params, const std::string& networkID, const CScript& signblockscript)
+{
+    CRIPEMD160 ripemd;
+    unsigned char commitment[20];
+    ripemd.Write((const unsigned char*)networkID.c_str(), networkID.length());
+    ripemd.Write((const unsigned char*)HexStr(params.fedpegScript).c_str(), HexStr(params.fedpegScript).length());
+    ripemd.Write((const unsigned char*)HexStr(signblockscript).c_str(), HexStr(signblockscript).length());
+    ripemd.Finalize(commitment);
+    return std::vector<unsigned char>(commitment, commitment + 20);
+}
+
 static CScript StrHexToScriptWithDefault(std::string strScript, const CScript defaultScript)
 {
     CScript returnScript;
@@ -29,14 +42,15 @@ static CScript StrHexToScriptWithDefault(std::string strScript, const CScript de
     return returnScript;
 }
 
-static CBlock CreateGenesisBlock(const char* pszTimestamp, const CScript& genesisOutputScript, uint32_t nTime, const CScript& scriptChallenge, int32_t nVersion, const CAmount& genesisReward, const uint32_t rewardShards, const CAsset& asset)
+static CBlock CreateGenesisBlock(const Consensus::Params& params, const std::string& networkID, const CScript& genesisOutputScript, uint32_t nTime, const CScript& scriptChallenge, int32_t nVersion, const CAmount& genesisReward, const uint32_t rewardShards, const CAsset& asset)
 {
     // Shards must be evenly divisible
     assert(MAX_MONEY % rewardShards == 0);
     CMutableTransaction txNew;
     txNew.nVersion = 1;
     txNew.vin.resize(1);
-    txNew.vin[0].scriptSig = CScript() << 486604799 << CScriptNum(4) << std::vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
+    // Any consensus-related values that are command-line set can be added here for anti-footgun
+    txNew.vin[0].scriptSig = CScript(CommitToArguments(params, networkID, scriptChallenge));
     txNew.vout.resize(rewardShards);
     for (unsigned int i = 0; i < rewardShards; i++) {
         txNew.vout[i].nValue = genesisReward/rewardShards;
@@ -128,7 +142,7 @@ class CElementsParams : public CChainParams {
 
         parentGenesisBlockHash = uint256S("000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943");
         CScript scriptDestination(CScript() << std::vector<unsigned char>(parentGenesisBlockHash.begin(), parentGenesisBlockHash.end()) << OP_WITHDRAWPROOFVERIFY);
-        genesis = CreateGenesisBlock(strNetworkID.c_str(), scriptDestination, 1231006505, genesisChallengeScript, 1, MAX_MONEY, 100, BITCOINID);
+        genesis = CreateGenesisBlock(consensus, strNetworkID, scriptDestination, 1231006505, genesisChallengeScript, 1, MAX_MONEY, 100, BITCOINID);
         consensus.hashGenesisBlock = genesis.GetHash();
 
         scriptCoinbaseDestination = CScript() << ParseHex("0229536c4c83789f59c30b93eb40d4abbd99b8dcc99ba8bd748f29e33c1d279e3c") << OP_CHECKSIG;
@@ -229,7 +243,7 @@ class CRegTestParams : public CChainParams {
         nDefaultPort = 7042;
         nPruneAfterHeight = 1000;
 
-        genesis = CreateGenesisBlock(strNetworkID.c_str(), defaultRegtestScript, 1296688602, genesisChallengeScript, 1, MAX_MONEY, 100, BITCOINID);
+        genesis = CreateGenesisBlock(consensus, strNetworkID, defaultRegtestScript, 1296688602, genesisChallengeScript, 1, MAX_MONEY, 100, BITCOINID);
         consensus.hashGenesisBlock = genesis.GetHash();
 
         parentGenesisBlockHash = uint256S("0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206");

src/init.cpp

@@ -1477,7 +1477,7 @@ bool AppInitMain(boost::thread_group& threadGroup, CScheduler& scheduler)
                 // If the loaded chain has a wrong genesis, bail out immediately
                 // (we're likely using a testnet datadir, or the other way around).
                 if (!mapBlockIndex.empty() && mapBlockIndex.count(chainparams.GetConsensus().hashGenesisBlock) == 0)
-                    return InitError(_("Incorrect or no genesis block found. Wrong datadir for network?"));
+                    return InitError(_("Incorrect or no genesis block found. Wrong `-fedpegscript`, `-signblockscript`, or datadir for network?"));
 
                 // Initialize the block index (no-op if non-empty database was already loaded)
                 if (!InitBlockIndex(chainparams)) {