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Remove CheckSig_mode and move logic out of CheckInputs()

This commit is contained in:
Pieter Wuille 2012-12-01 22:51:10 +01:00
parent 2800ce7367
commit 1d70f4bde8
2 changed files with 8 additions and 14 deletions
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13
src/main.cpp
View File

@ -772,7 +772,7 @@ bool CTxMemPool::accept(CTransaction &tx, bool fCheckInputs,
// Check against previous transactions
// This is done last to help prevent CPU exhaustion denial-of-service attacks.
if (!tx.CheckInputs(view, CS_ALWAYS, SCRIPT_VERIFY_P2SH))
if (!tx.CheckInputs(view, true, SCRIPT_VERIFY_P2SH))
{
return error("CTxMemPool::accept() : ConnectInputs failed %s", hash.ToString().substr(0,10).c_str());
}
@ -1360,7 +1360,7 @@ bool VerifySignature(const CCoins& txFrom, const CTransaction& txTo, unsigned in
return CScriptCheck(txFrom, txTo, nIn, flags, nHashType)();
}
bool CTransaction::CheckInputs(CCoinsViewCache &inputs, enum CheckSig_mode csmode, unsigned int flags) const
bool CTransaction::CheckInputs(CCoinsViewCache &inputs, bool fScriptChecks, unsigned int flags) const
{
if (!IsCoinBase())
{
@ -1410,8 +1410,7 @@ bool CTransaction::CheckInputs(CCoinsViewCache &inputs, enum CheckSig_mode csmod
// Skip ECDSA signature verification when connecting blocks
// before the last block chain checkpoint. This is safe because block merkle hashes are
// still computed and checked, and any change will be caught at the next checkpoint.
if (csmode == CS_ALWAYS ||
(csmode == CS_AFTER_CHECKPOINT && inputs.GetBestBlock()->nHeight >= Checkpoints::GetTotalBlocksEstimate())) {
if (fScriptChecks) {
for (unsigned int i = 0; i < vin.size(); i++) {
const COutPoint &prevout = vin[i].prevout;
const CCoins &coins = inputs.GetCoins(prevout.hash);
@ -1577,6 +1576,8 @@ bool CBlock::ConnectBlock(CBlockIndex* pindex, CCoinsViewCache &view, bool fJust
// verify that the view's current state corresponds to the previous block
assert(pindex->pprev == view.GetBestBlock());
bool fScriptChecks = pindex->nHeight >= Checkpoints::GetTotalBlocksEstimate();
// Do not allow blocks that contain transactions which 'overwrite' older transactions,
// unless those are already completely spent.
// If such overwrites are allowed, coinbases and transactions depending upon those
@ -1637,7 +1638,7 @@ bool CBlock::ConnectBlock(CBlockIndex* pindex, CCoinsViewCache &view, bool fJust
nFees += tx.GetValueIn(view)-tx.GetValueOut();
if (!tx.CheckInputs(view, CS_AFTER_CHECKPOINT, fStrictPayToScriptHash ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE))
if (!tx.CheckInputs(view, fScriptChecks, fStrictPayToScriptHash ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE))
return false;
}
@ -3924,7 +3925,7 @@ CBlock* CreateNewBlock(CReserveKey& reservekey)
if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
continue;
if (!tx.CheckInputs(viewTemp, CS_ALWAYS, SCRIPT_VERIFY_P2SH))
if (!tx.CheckInputs(viewTemp, true, SCRIPT_VERIFY_P2SH))
continue;
CTxUndo txundo;

9
src/main.h
View File

@ -430,13 +430,6 @@ enum GetMinFee_mode
GMF_SEND,
};
enum CheckSig_mode
{
CS_NEVER, // never validate scripts
CS_AFTER_CHECKPOINT, // validate scripts after the last checkpoint
CS_ALWAYS // always validate scripts
};
/** The basic transaction that is broadcasted on the network and contained in
* blocks. A transaction can contain multiple inputs and outputs.
*/
@ -641,7 +634,7 @@ public:
// Check whether all inputs of this transaction are valid (no double spends, scripts & sigs, amounts)
// This does not modify the UTXO set
bool CheckInputs(CCoinsViewCache &view, enum CheckSig_mode csmode, unsigned int flags = SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC) const;
bool CheckInputs(CCoinsViewCache &view, bool fScriptChecks = true, unsigned int flags = SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC) const;
// Apply the effects of this transaction on the UTXO set represented by view
bool UpdateCoins(CCoinsViewCache &view, CTxUndo &txundo, int nHeight, const uint256 &txhash) const;