// Copyright (c) 2009-2010 Satoshi Nakamoto // Copyright (c) 2009-2016 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 "script/interpreter.h" #include "script/standard.h" #include class CCoinsViewCache; /** Default for -blockmaxsize, which controls the maximum size of block the mining code will create **/ static const unsigned int DEFAULT_BLOCK_MAX_SIZE = 750000; /** Default for -blockprioritysize, maximum space for zero/low-fee transactions **/ static const unsigned int DEFAULT_BLOCK_PRIORITY_SIZE = 27000; /** Default for -blockmaxweight, which controls the range of block weights the mining code will create **/ static const unsigned int DEFAULT_BLOCK_MAX_WEIGHT = 3000000; /** 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; /** 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 CAmount DEFAULT_INCREMENTAL_RELAY_FEE = 1000; /** Default for -bytespersigop */ static const unsigned int DEFAULT_BYTES_PER_SIGOP = 20; /** 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 a standard witnessScript */ static const unsigned int MAX_STANDARD_P2WSH_SCRIPT_SIZE = 3600; /** Min feerate for defining dust. Historically this has been the same as 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 CAmount DUST_RELAY_TX_FEE = COIN / 100000; /** * Dogecoin: Default dust limit that is evaluated when considering whether a * transaction output is required to pay additional fee for relay and inclusion * in blocks. Overridden by -dustlimit */ static const CAmount DEFAULT_DUST_LIMIT = COIN / 1; /** * 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 const 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; /** For convenience, standard but not mandatory verify flags. */ static const 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 const unsigned int STANDARD_LOCKTIME_VERIFY_FLAGS = LOCKTIME_VERIFY_SEQUENCE | LOCKTIME_MEDIAN_TIME_PAST; bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType, const bool witnessEnabled = false); /** * Check for standard transaction types * @return True if all outputs (scriptPubKeys) use only standard transaction forms */ bool IsStandardTx(const CTransaction& tx, std::string& reason, const bool witnessEnabled = false); /** * Check for standard transaction types * @param[in] mapInputs Map of previous transactions that have outputs we're spending * @return True if all inputs (scriptSigs) use only standard transaction forms */ bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs); /** * 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); extern CFeeRate incrementalRelayFee; extern CFeeRate dustRelayFee; extern unsigned int nBytesPerSigOp; extern CAmount nDustLimit; /** Compute the virtual transaction size (weight reinterpreted as bytes). */ int64_t GetVirtualTransactionSize(int64_t nWeight, int64_t nSigOpCost); int64_t GetVirtualTransactionSize(const CTransaction& tx, int64_t nSigOpCost = 0); #endif // BITCOIN_POLICY_POLICY_H