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| author | Wladimir J. van der Laan <laanwj@gmail.com> | 2015-08-06 11:59:53 +0200 |
|---|---|---|
| committer | Wladimir J. van der Laan <laanwj@gmail.com> | 2015-08-06 12:01:21 +0200 |
| commit | 2f746c6e8a5d10fa2d432de9b43b694f40d5f4a1 (patch) | |
| tree | 79269aacdc5605b430d60a73a20ed2f52397857d /src | |
| parent | 149f96c9b0693a61f27016572a12fb21436a442d (diff) | |
| parent | ef8dfe41d1eba0de6d6554e25e658169f97313b5 (diff) | |
Merge pull request #6177
ef8dfe4 Prevent block.nTime from decreasing (Mark Friedenbach)
Diffstat (limited to 'src')
| -rw-r--r-- | src/miner.cpp | 14 | ||||
| -rw-r--r-- | src/miner.h | 2 |
2 files changed, 12 insertions, 4 deletions
diff --git a/src/miner.cpp b/src/miner.cpp index e44f3392c8..864e4bf31f 100644 --- a/src/miner.cpp +++ b/src/miner.cpp @@ -84,13 +84,19 @@ public: } }; -void UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev) +int64_t UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev) { - pblock->nTime = std::max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime()); + int64_t nOldTime = pblock->nTime; + int64_t nNewTime = std::max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime()); + + if (nOldTime < nNewTime) + pblock->nTime = nNewTime; // Updating time can change work required on testnet: if (consensusParams.fPowAllowMinDifficultyBlocks) pblock->nBits = GetNextWorkRequired(pindexPrev, pblock, consensusParams); + + return nNewTime - nOldTime; } CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn) @@ -521,7 +527,9 @@ void static BitcoinMiner(const CChainParams& chainparams) break; // Update nTime every few seconds - UpdateTime(pblock, chainparams.GetConsensus(), pindexPrev); + if (UpdateTime(pblock, chainparams.GetConsensus(), pindexPrev) < 0) + break; // Recreate the block if the clock has run backwards, + // so that we can use the correct time. if (chainparams.GetConsensus().fPowAllowMinDifficultyBlocks) { // Changing pblock->nTime can change work required on testnet: diff --git a/src/miner.h b/src/miner.h index 777a091967..d690e9447d 100644 --- a/src/miner.h +++ b/src/miner.h @@ -30,6 +30,6 @@ void GenerateBitcoins(bool fGenerate, int nThreads, const CChainParams& chainpar CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn); /** Modify the extranonce in a block */ void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce); -void UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev); +int64_t UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev); #endif // BITCOIN_MINER_H |