Mercurial > hg > bitcoin
changeset 1318:42399b6f2f24 draft
Skip verifying transaction signatures during initial block-chain download
author | Gavin Andresen <gavinandresen@gmail.com> |
---|---|
date | Fri, 02 Sep 2011 16:59:47 -0400 |
parents | 50dec677704a |
children | b8ef58557739 |
files | src/main.cpp |
diffstat | 1 files changed, 10 insertions(+), 3 deletions(-) [+] |
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line diff
--- a/src/main.cpp +++ b/src/main.cpp @@ -810,6 +810,9 @@ CBlockIndex* pindexBlock, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee) { // Take over previous transactions' spent pointers + // fBlock is true when this is called from AcceptBlock when a new best-block is added to the blockchain + // fMiner is true when called from the internal bitcoin miner + // ... both are false when called from CTransaction::AcceptToMemoryPool if (!IsCoinBase()) { int64 nValueIn = 0; @@ -863,9 +866,13 @@ if (pindex->nBlockPos == txindex.pos.nBlockPos && pindex->nFile == txindex.pos.nFile) return DoS(10, error("ConnectInputs() : tried to spend coinbase at depth %d", pindexBlock->nHeight - pindex->nHeight)); - // Verify signature - if (!VerifySignature(txPrev, *this, i)) - return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str())); + // Skip ECDSA signature verification when connecting blocks (fBlock=true) during initial download + // (before the last blockchain checkpoint). This is safe because block merkle hashes are + // still computed and checked, and any change will be caught at the next checkpoint. + if (!(fBlock && IsInitialBlockDownload())) + // Verify signature + if (!VerifySignature(txPrev, *this, i)) + return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str())); // Check for conflicts (double-spend) // This doesn't trigger the DoS code on purpose; if it did, it would make it easier