LBRYCommunity/lbrycrd
1
0
Fork 0
Code Issues 29 Pull requests 1 Projects Releases 32 Packages Wiki Activity

Skip verifying transaction signatures during initial block-chain download

Browse source
This commit is contained in:
Gavin Andresen 2011-09-02 16:59:47 -04:00
parent 6b8a5ab622
commit b14bd4df58
1 changed files with 10 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
src/main.cpp
View file

@ -810,6 +810,9 @@ bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPoo
CBlockIndex* pindexBlock, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee) CBlockIndex* pindexBlock, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee)
{ {
// Take over previous transactions' spent pointers // 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()) if (!IsCoinBase())
{ {
int64 nValueIn = 0; int64 nValueIn = 0;
@ -863,6 +866,10 @@ bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPoo
if (pindex->nBlockPos == txindex.pos.nBlockPos && pindex->nFile == txindex.pos.nFile) 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)); return DoS(10, error("ConnectInputs() : tried to spend coinbase at depth %d", pindexBlock->nHeight - pindex->nHeight));
// 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 // Verify signature
if (!VerifySignature(txPrev, *this, i)) if (!VerifySignature(txPrev, *this, i))
return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str())); return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));