git / moonbite-core / src/policy/policy.h · raw
// Copyright (c) 2009-2010 Satoshi Nakamoto// Copyright (c) 2009-2019 The Bitcoin Core developers// Distributed under the MIT software license, see the accompanying// file COPYING or http://www.opensource.org/licenses/mit-license.php.#ifndef BITCOIN_POLICY_POLICY_H#define BITCOIN_POLICY_POLICY_H#include <consensus/consensus.h>#include <policy/feerate.h>#include <script/interpreter.h>#include <script/standard.h>#include <string>class CCoinsViewCache;class CTxOut;/** Default for -blockmaxweight, which controls the range of block weights the mining code will create **/static const unsigned int DEFAULT_BLOCK_MAX_WEIGHT = MAX_BLOCK_WEIGHT - 4000;/** Default for -blockmintxfee, which sets the minimum feerate for a transaction in blocks created by mining code **/static const unsigned int DEFAULT_BLOCK_MIN_TX_FEE = 1000;/** The maximum weight for transactions we're willing to relay/mine */static const unsigned int MAX_STANDARD_TX_WEIGHT = 400000;/** The minimum non-witness size for transactions we're willing to relay/mine (1 segwit input + 1 P2WPKH output = 82 bytes) */static const unsigned int MIN_STANDARD_TX_NONWITNESS_SIZE = 82;/** Maximum number of signature check operations in an IsStandard() P2SH script */static const unsigned int MAX_P2SH_SIGOPS = 15;/** The maximum number of sigops we're willing to relay/mine in a single tx */static const unsigned int MAX_STANDARD_TX_SIGOPS_COST = MAX_BLOCK_SIGOPS_COST/5;/** Default for -maxmempool, maximum megabytes of mempool memory usage */static const unsigned int DEFAULT_MAX_MEMPOOL_SIZE = 300;/** Default for -incrementalrelayfee, which sets the minimum feerate increase for mempool limiting or BIP 125 replacement **/static const unsigned int DEFAULT_INCREMENTAL_RELAY_FEE = 1000;/** Default for -bytespersigop */static const unsigned int DEFAULT_BYTES_PER_SIGOP = 20;/** Default for -permitbaremultisig */static const bool DEFAULT_PERMIT_BAREMULTISIG = true;/** The maximum number of witness stack items in a standard P2WSH script */static const unsigned int MAX_STANDARD_P2WSH_STACK_ITEMS = 100;/** The maximum size of each witness stack item in a standard P2WSH script */static const unsigned int MAX_STANDARD_P2WSH_STACK_ITEM_SIZE = 80;/** The maximum size of each witness stack item in a standard BIP 342 script (Taproot, leaf version 0xc0) */static const unsigned int MAX_STANDARD_TAPSCRIPT_STACK_ITEM_SIZE = 80;/** The maximum size of a standard witnessScript */static const unsigned int MAX_STANDARD_P2WSH_SCRIPT_SIZE = 3600;/** Min feerate for defining dust. Historically this has been based on the * minRelayTxFee, however changing the dust limit changes which transactions are * standard and should be done with care and ideally rarely. It makes sense to * only increase the dust limit after prior releases were already not creating * outputs below the new threshold */static const unsigned int DUST_RELAY_TX_FEE = 30'000;/** * Standard script verification flags that standard transactions will comply * with. However scripts violating these flags may still be present in valid * blocks and we must accept those blocks. */static constexpr unsigned int STANDARD_SCRIPT_VERIFY_FLAGS = MANDATORY_SCRIPT_VERIFY_FLAGS | SCRIPT_VERIFY_DERSIG | SCRIPT_VERIFY_STRICTENC | SCRIPT_VERIFY_MINIMALDATA | SCRIPT_VERIFY_NULLDUMMY | SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS | SCRIPT_VERIFY_CLEANSTACK | SCRIPT_VERIFY_MINIMALIF | SCRIPT_VERIFY_NULLFAIL | SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY | SCRIPT_VERIFY_CHECKSEQUENCEVERIFY | SCRIPT_VERIFY_LOW_S | SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM | SCRIPT_VERIFY_WITNESS_PUBKEYTYPE | SCRIPT_VERIFY_CONST_SCRIPTCODE | SCRIPT_VERIFY_TAPROOT | SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_TAPROOT_VERSION | SCRIPT_VERIFY_DISCOURAGE_OP_SUCCESS | SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_PUBKEYTYPE;/** For convenience, standard but not mandatory verify flags. */static constexpr unsigned int STANDARD_NOT_MANDATORY_VERIFY_FLAGS = STANDARD_SCRIPT_VERIFY_FLAGS & ~MANDATORY_SCRIPT_VERIFY_FLAGS;/** Used as the flags parameter to sequence and nLocktime checks in non-consensus code. */static constexpr unsigned int STANDARD_LOCKTIME_VERIFY_FLAGS = LOCKTIME_VERIFY_SEQUENCE | LOCKTIME_MEDIAN_TIME_PAST;CAmount GetDustThreshold(const CTxOut& txout, const CFeeRate& dustRelayFee);bool IsDust(const CTxOut& txout, const CFeeRate& dustRelayFee);bool IsStandard(const CScript& scriptPubKey, TxoutType& whichType); /** * Check for standard transaction types * @return True if all outputs (scriptPubKeys) use only standard transaction forms */bool IsStandardTx(const CTransaction& tx, bool permit_bare_multisig, const CFeeRate& dust_relay_fee, std::string& reason); /** * Check for standard transaction types * @param[in] mapInputs Map of previous transactions that have outputs we're spending * @param[in] taproot_active Whether or taproot consensus rules are active (used to decide whether spends of them are permitted) * @return True if all inputs (scriptSigs) use only standard transaction forms */bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs, bool taproot_active); /** * Check if the transaction is over standard P2WSH resources limit: * 3600bytes witnessScript size, 80bytes per witness stack element, 100 witness stack elements * These limits are adequate for multi-signature up to n-of-100 using OP_CHECKSIG, OP_ADD, and OP_EQUAL, */bool IsWitnessStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs);/** Compute the virtual transaction size (weight reinterpreted as bytes). */int64_t GetVirtualTransactionSize(int64_t nWeight, int64_t nSigOpCost, unsigned int bytes_per_sigop);int64_t GetVirtualTransactionSize(const CTransaction& tx, int64_t nSigOpCost, unsigned int bytes_per_sigop);int64_t GetVirtualTransactionInputSize(const CTxIn& tx, int64_t nSigOpCost, unsigned int bytes_per_sigop);static inline int64_t GetVirtualTransactionSize(const CTransaction& tx){ return GetVirtualTransactionSize(tx, 0, 0);}static inline int64_t GetVirtualTransactionInputSize(const CTxIn& tx){ return GetVirtualTransactionInputSize(tx, 0, 0);}#endif // BITCOIN_POLICY_POLICY_H