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87 lines
4.6 KiB
C++
87 lines
4.6 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2016 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_POLICY_POLICY_H
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#define BITCOIN_POLICY_POLICY_H
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#include <consensus/consensus.h>
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#include <policy/feerate.h>
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#include <script/interpreter.h>
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#include <script/standard.h>
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#include <string>
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class CCoinsViewCache;
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class CTxOut;
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/** Default for -blockmaxsize, which controls the maximum size of block the mining code will create **/
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static const unsigned int DEFAULT_BLOCK_MAX_SIZE = 2000000;
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/** Default for -blockmintxfee, which sets the minimum feerate for a transaction in blocks created by mining code **/
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static const unsigned int DEFAULT_BLOCK_MIN_TX_FEE = 1000;
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/** The maximum size for transactions we're willing to relay/mine */
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static const unsigned int MAX_STANDARD_TX_SIZE = 100000;
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/** The minimum size for transactions we're willing to relay/mine (1 empty scriptSig input + 1 P2PKH output = 85 bytes) */
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static const unsigned int MIN_STANDARD_TX_SIZE = 85;
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/** Maximum number of signature check operations in an IsStandard() P2SH script */
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static const unsigned int MAX_P2SH_SIGOPS = 15;
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/** The maximum number of sigops we're willing to relay/mine in a single tx */
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static const unsigned int MAX_STANDARD_TX_SIGOPS = 4000;
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/** Default for -maxmempool, maximum megabytes of mempool memory usage */
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static const unsigned int DEFAULT_MAX_MEMPOOL_SIZE = 300;
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/** Default for -incrementalrelayfee, which sets the minimum feerate increase for mempool limiting or BIP 125 replacement **/
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static const unsigned int DEFAULT_INCREMENTAL_RELAY_FEE = 1000;
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/** Min feerate for defining dust. Historically this has been based on the
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* minRelayTxFee, however changing the dust limit changes which transactions are
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* standard and should be done with care and ideally rarely. It makes sense to
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* only increase the dust limit after prior releases were already not creating
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* outputs below the new threshold */
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static const unsigned int DUST_RELAY_TX_FEE = 3000;
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/**
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* Standard script verification flags that standard transactions will comply
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* with. However scripts violating these flags may still be present in valid
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* blocks and we must accept those blocks.
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*/
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static const unsigned int STANDARD_SCRIPT_VERIFY_FLAGS = MANDATORY_SCRIPT_VERIFY_FLAGS |
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SCRIPT_VERIFY_DERSIG |
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SCRIPT_VERIFY_STRICTENC |
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SCRIPT_VERIFY_MINIMALDATA |
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SCRIPT_VERIFY_NULLDUMMY |
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SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS |
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SCRIPT_VERIFY_CLEANSTACK |
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SCRIPT_VERIFY_NULLFAIL |
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SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY |
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SCRIPT_VERIFY_CHECKSEQUENCEVERIFY |
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SCRIPT_VERIFY_LOW_S |
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SCRIPT_ENABLE_DIP0020_OPCODES |
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SCRIPT_VERIFY_CONST_SCRIPTCODE;
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/** For convenience, standard but not mandatory verify flags. */
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static const unsigned int STANDARD_NOT_MANDATORY_VERIFY_FLAGS = STANDARD_SCRIPT_VERIFY_FLAGS & ~MANDATORY_SCRIPT_VERIFY_FLAGS;
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/** Used as the flags parameter to sequence and nLocktime checks in non-consensus code. */
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static const unsigned int STANDARD_LOCKTIME_VERIFY_FLAGS = LOCKTIME_VERIFY_SEQUENCE |
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LOCKTIME_MEDIAN_TIME_PAST;
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CAmount GetDustThreshold(const CTxOut& txout, const CFeeRate& dustRelayFee);
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bool IsDust(const CTxOut& txout, const CFeeRate& dustRelayFee);
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bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType);
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/**
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* Check for standard transaction types
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* @return True if all outputs (scriptPubKeys) use only standard transaction forms
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*/
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bool IsStandardTx(const CTransaction& tx, std::string& reason);
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/**
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* Check for standard transaction types
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* @param[in] mapInputs Map of previous transactions that have outputs we're spending
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* @return True if all inputs (scriptSigs) use only standard transaction forms
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*/
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bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs);
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extern CFeeRate incrementalRelayFee;
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extern CFeeRate dustRelayFee;
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#endif // BITCOIN_POLICY_POLICY_H
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