113 lines
6.3 KiB
C++
113 lines
6.3 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 "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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/** 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 = 750000;
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/** Default for -blockprioritysize, maximum space for zero/low-fee transactions **/
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static const unsigned int DEFAULT_BLOCK_PRIORITY_SIZE = 27000;
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/** Default for -blockmaxweight, which controls the range of block weights the mining code will create **/
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static const unsigned int DEFAULT_BLOCK_MAX_WEIGHT = 3000000;
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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 weight for transactions we're willing to relay/mine */
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static const unsigned int MAX_STANDARD_TX_WEIGHT = 400000;
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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_COST = MAX_BLOCK_SIGOPS_COST/5;
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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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/** Default for -bytespersigop */
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static const unsigned int DEFAULT_BYTES_PER_SIGOP = 20;
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/** The maximum number of witness stack items in a standard P2WSH script */
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static const unsigned int MAX_STANDARD_P2WSH_STACK_ITEMS = 100;
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/** The maximum size of each witness stack item in a standard P2WSH script */
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static const unsigned int MAX_STANDARD_P2WSH_STACK_ITEM_SIZE = 80;
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/** The maximum size of a standard witnessScript */
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static const unsigned int MAX_STANDARD_P2WSH_SCRIPT_SIZE = 3600;
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/** Min feerate for defining dust. Historically this has been the same as 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 = COIN / 100000;
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/**
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* Dogecoin: Default dust limit that is evaluated when considering whether a
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* transaction output is required to pay additional fee for relay and inclusion
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* in blocks. Overridden by -dustlimit
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*/
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static const unsigned int DEFAULT_DUST_LIMIT = COIN / 1;
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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_MINIMALIF |
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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_VERIFY_WITNESS |
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SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM |
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SCRIPT_VERIFY_WITNESS_PUBKEYTYPE;
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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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bool IsStandard(const CScript& scriptPubKey, txnouttype& whichType, const bool witnessEnabled = false);
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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, const bool witnessEnabled = false);
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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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/**
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* Check if the transaction is over standard P2WSH resources limit:
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* 3600bytes witnessScript size, 80bytes per witness stack element, 100 witness stack elements
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* These limits are adequate for multi-signature up to n-of-100 using OP_CHECKSIG, OP_ADD, and OP_EQUAL,
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*/
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bool IsWitnessStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs);
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extern CFeeRate incrementalRelayFee;
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extern CFeeRate dustRelayFee;
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extern unsigned int nBytesPerSigOp;
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extern unsigned int nDustLimit;
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/** Compute the virtual transaction size (weight reinterpreted as bytes). */
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int64_t GetVirtualTransactionSize(int64_t nWeight, int64_t nSigOpCost);
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int64_t GetVirtualTransactionSize(const CTransaction& tx, int64_t nSigOpCost = 0);
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#endif // BITCOIN_POLICY_POLICY_H
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