78 lines
3.1 KiB
C++
78 lines
3.1 KiB
C++
// Copyright (c) 2017-2017 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_CONSENSUS_TX_VERIFY_H
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#define BITCOIN_CONSENSUS_TX_VERIFY_H
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#include <stdint.h>
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#include <vector>
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class CBlockIndex;
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class CCoinsViewCache;
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class CTransaction;
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class CValidationState;
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/** Transaction validation functions */
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/** Context-independent validity checks */
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bool CheckTransaction(const CTransaction& tx, CValidationState& state, bool fCheckDuplicateInputs=true);
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namespace Consensus {
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/**
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* Check whether all inputs of this transaction are valid (no double spends and amounts)
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* This does not modify the UTXO set. This does not check scripts and sigs.
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* Preconditions: tx.IsCoinBase() is false.
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*/
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bool CheckTxInputs(const CTransaction& tx, CValidationState& state, const CCoinsViewCache& inputs, int nSpendHeight);
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} // namespace Consensus
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/** Auxiliary functions for transaction validation (ideally should not be exposed) */
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/**
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* Count ECDSA signature operations the old-fashioned (pre-0.6) way
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* @return number of sigops this transaction's outputs will produce when spent
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* @see CTransaction::FetchInputs
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*/
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unsigned int GetLegacySigOpCount(const CTransaction& tx);
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/**
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* Count ECDSA signature operations in pay-to-script-hash inputs.
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*
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* @param[in] mapInputs Map of previous transactions that have outputs we're spending
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* @return maximum number of sigops required to validate this transaction's inputs
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* @see CTransaction::FetchInputs
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*/
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unsigned int GetP2SHSigOpCount(const CTransaction& tx, const CCoinsViewCache& mapInputs);
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/**
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* Compute total signature operation cost of a transaction.
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* @param[in] tx Transaction for which we are computing the cost
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* @param[in] inputs Map of previous transactions that have outputs we're spending
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* @param[out] flags Script verification flags
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* @return Total signature operation cost of tx
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*/
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int64_t GetTransactionSigOpCost(const CTransaction& tx, const CCoinsViewCache& inputs, int flags);
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/**
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* Check if transaction is final and can be included in a block with the
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* specified height and time. Consensus critical.
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*/
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bool IsFinalTx(const CTransaction &tx, int nBlockHeight, int64_t nBlockTime);
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/**
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* Calculates the block height and previous block's median time past at
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* which the transaction will be considered final in the context of BIP 68.
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* Also removes from the vector of input heights any entries which did not
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* correspond to sequence locked inputs as they do not affect the calculation.
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*/
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std::pair<int, int64_t> CalculateSequenceLocks(const CTransaction &tx, int flags, std::vector<int>* prevHeights, const CBlockIndex& block);
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bool EvaluateSequenceLocks(const CBlockIndex& block, std::pair<int, int64_t> lockPair);
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/**
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* Check if transaction is final per BIP 68 sequence numbers and can be included in a block.
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* Consensus critical. Takes as input a list of heights at which tx's inputs (in order) confirmed.
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*/
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bool SequenceLocks(const CTransaction &tx, int flags, std::vector<int>* prevHeights, const CBlockIndex& block);
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#endif // BITCOIN_CONSENSUS_TX_VERIFY_H
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