diff options
| -rw-r--r-- | src/chainparams.cpp | 6 | ||||
| -rw-r--r-- | src/consensus/params.h | 3 | ||||
| -rw-r--r-- | src/main.cpp | 11 |
3 files changed, 20 insertions, 0 deletions
diff --git a/src/chainparams.cpp b/src/chainparams.cpp index dd26c3b31a..5d6d1ef9d8 100644 --- a/src/chainparams.cpp +++ b/src/chainparams.cpp @@ -73,6 +73,8 @@ public: consensus.nMajorityEnforceBlockUpgrade = 750; consensus.nMajorityRejectBlockOutdated = 950; consensus.nMajorityWindow = 1000; + consensus.BIP34Height = 227931; + consensus.BIP34Hash = uint256S("0x000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8"); consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks consensus.nPowTargetSpacing = 10 * 60; @@ -153,6 +155,8 @@ public: consensus.nMajorityEnforceBlockUpgrade = 51; consensus.nMajorityRejectBlockOutdated = 75; consensus.nMajorityWindow = 100; + consensus.BIP34Height = 21111; + consensus.BIP34Hash = uint256S("0x0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8"); consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks consensus.nPowTargetSpacing = 10 * 60; @@ -216,6 +220,8 @@ public: consensus.nMajorityEnforceBlockUpgrade = 750; consensus.nMajorityRejectBlockOutdated = 950; consensus.nMajorityWindow = 1000; + consensus.BIP34Height = -1; // BIP34 has not necessarily activated on regtest + consensus.BIP34Hash = uint256(); consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks consensus.nPowTargetSpacing = 10 * 60; diff --git a/src/consensus/params.h b/src/consensus/params.h index efbbbed352..5ebc48a8df 100644 --- a/src/consensus/params.h +++ b/src/consensus/params.h @@ -19,6 +19,9 @@ struct Params { int nMajorityEnforceBlockUpgrade; int nMajorityRejectBlockOutdated; int nMajorityWindow; + /** Block height and hash at which BIP34 becomes active */ + int BIP34Height; + uint256 BIP34Hash; /** Proof of work parameters */ uint256 powLimit; bool fPowAllowMinDifficultyBlocks; diff --git a/src/main.cpp b/src/main.cpp index f1a4527540..6e5a81f306 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -1769,6 +1769,17 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin bool fEnforceBIP30 = (!pindex->phashBlock) || // Enforce on CreateNewBlock invocations which don't have a hash. !((pindex->nHeight==91842 && pindex->GetBlockHash() == uint256S("0x00000000000a4d0a398161ffc163c503763b1f4360639393e0e4c8e300e0caec")) || (pindex->nHeight==91880 && pindex->GetBlockHash() == uint256S("0x00000000000743f190a18c5577a3c2d2a1f610ae9601ac046a38084ccb7cd721"))); + + // Once BIP34 activated it was not possible to create new duplicate coinbases and thus other than starting + // with the 2 existing duplicate coinbase pairs, not possible to create overwriting txs. But by the + // time BIP34 activated, in each of the existing pairs the duplicate coinbase had overwritten the first + // before the first had been spent. Since those coinbases are sufficiently buried its no longer possible to create further + // duplicate transactions descending from the known pairs either. + // If we're on the known chain at height greater than where BIP34 activated, we can save the db accesses needed for the BIP30 check. + CBlockIndex *pindexBIP34height = pindex->pprev->GetAncestor(chainparams.GetConsensus().BIP34Height); + //Only continue to enforce if we're below BIP34 activation height or the block hash at that height doesn't correspond. + fEnforceBIP30 = fEnforceBIP30 && (!pindexBIP34height || !(pindexBIP34height->GetBlockHash() == chainparams.GetConsensus().BIP34Hash)); + if (fEnforceBIP30) { BOOST_FOREACH(const CTransaction& tx, block.vtx) { const CCoins* coins = view.AccessCoins(tx.GetHash()); |