diff options
Diffstat (limited to 'src/consensus/tx_verify.cpp')
| -rw-r--r-- | src/consensus/tx_verify.cpp | 76 |
1 files changed, 39 insertions, 37 deletions
diff --git a/src/consensus/tx_verify.cpp b/src/consensus/tx_verify.cpp index 0671cbc132..25647ba6af 100644 --- a/src/consensus/tx_verify.cpp +++ b/src/consensus/tx_verify.cpp @@ -13,7 +13,7 @@ #include "chain.h" #include "coins.h" #include "utilmoneystr.h" - + bool IsFinalTx(const CTransaction &tx, int nBlockHeight, int64_t nBlockTime) { if (tx.nLockTime == 0) @@ -207,44 +207,46 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state, bool fChe bool Consensus::CheckTxInputs(const CTransaction& tx, CValidationState& state, const CCoinsViewCache& inputs, int nSpendHeight) { - // This doesn't trigger the DoS code on purpose; if it did, it would make it easier - // for an attacker to attempt to split the network. - if (!inputs.HaveInputs(tx)) - return state.Invalid(false, 0, "", "Inputs unavailable"); - - CAmount nValueIn = 0; - CAmount nFees = 0; - for (unsigned int i = 0; i < tx.vin.size(); i++) - { - const COutPoint &prevout = tx.vin[i].prevout; - const Coin& coin = inputs.AccessCoin(prevout); - assert(!coin.IsSpent()); - - // If prev is coinbase, check that it's matured - if (coin.IsCoinBase()) { - if (nSpendHeight - coin.nHeight < COINBASE_MATURITY) - return state.Invalid(false, - REJECT_INVALID, "bad-txns-premature-spend-of-coinbase", - strprintf("tried to spend coinbase at depth %d", nSpendHeight - coin.nHeight)); - } - - // Check for negative or overflow input values - nValueIn += coin.out.nValue; - if (!MoneyRange(coin.out.nValue) || !MoneyRange(nValueIn)) - return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputvalues-outofrange"); + // This doesn't trigger the DoS code on purpose; if it did, it would make it easier + // for an attacker to attempt to split the network. + if (!inputs.HaveInputs(tx)) { + return state.Invalid(false, 0, "", "Inputs unavailable"); + } + + CAmount nValueIn = 0; + CAmount nFees = 0; + for (unsigned int i = 0; i < tx.vin.size(); ++i) { + const COutPoint &prevout = tx.vin[i].prevout; + const Coin& coin = inputs.AccessCoin(prevout); + assert(!coin.IsSpent()); + + // If prev is coinbase, check that it's matured + if (coin.IsCoinBase() && nSpendHeight - coin.nHeight < COINBASE_MATURITY) { + return state.Invalid(false, + REJECT_INVALID, "bad-txns-premature-spend-of-coinbase", + strprintf("tried to spend coinbase at depth %d", nSpendHeight - coin.nHeight)); + } + // Check for negative or overflow input values + nValueIn += coin.out.nValue; + if (!MoneyRange(coin.out.nValue) || !MoneyRange(nValueIn)) { + return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputvalues-outofrange"); } + } + + if (nValueIn < tx.GetValueOut()) { + return state.DoS(100, false, REJECT_INVALID, "bad-txns-in-belowout", false, + strprintf("value in (%s) < value out (%s)", FormatMoney(nValueIn), FormatMoney(tx.GetValueOut()))); + } - if (nValueIn < tx.GetValueOut()) - return state.DoS(100, false, REJECT_INVALID, "bad-txns-in-belowout", false, - strprintf("value in (%s) < value out (%s)", FormatMoney(nValueIn), FormatMoney(tx.GetValueOut()))); - - // Tally transaction fees - CAmount nTxFee = nValueIn - tx.GetValueOut(); - if (nTxFee < 0) - return state.DoS(100, false, REJECT_INVALID, "bad-txns-fee-negative"); - nFees += nTxFee; - if (!MoneyRange(nFees)) - return state.DoS(100, false, REJECT_INVALID, "bad-txns-fee-outofrange"); + // Tally transaction fees + CAmount nTxFee = nValueIn - tx.GetValueOut(); + if (nTxFee < 0) { + return state.DoS(100, false, REJECT_INVALID, "bad-txns-fee-negative"); + } + nFees += nTxFee; + if (!MoneyRange(nFees)) { + return state.DoS(100, false, REJECT_INVALID, "bad-txns-fee-outofrange"); + } return true; } |