1// Copyright (c) 2009-2010 Satoshi Nakamoto
2// Copyright (c) 2009-present The Bitcoin Core developers
3// Distributed under the MIT software license, see the accompanying
4// file COPYING or http://www.opensource.org/licenses/mit-license.php.
5
6#ifndef BITCOIN_CONSENSUS_CONSENSUS_H
7#define BITCOIN_CONSENSUS_CONSENSUS_H
8
9#include <cstddef>
10#include <cstdint>
11
12/** The maximum allowed size for a serialized block, in bytes (only for buffer size limits) */
13inline constexpr unsigned int MAX_BLOCK_SERIALIZED_SIZE{4'000'000};
14/** The maximum allowed weight for a block, see BIP 141 (network rule) */
15inline constexpr unsigned int MAX_BLOCK_WEIGHT{4'000'000};
16/** The maximum allowed number of signature check operations in a block (network rule) */
17inline constexpr int64_t MAX_BLOCK_SIGOPS_COST{80'000};
18/** Coinbase transaction outputs can only be spent after this number of new blocks (network rule) */
19inline constexpr int COINBASE_MATURITY = 100;
20
21inline constexpr int WITNESS_SCALE_FACTOR = 4;
22
23inline constexpr size_t MIN_TRANSACTION_WEIGHT = WITNESS_SCALE_FACTOR * 60; // 60 is the lower bound for the size of a valid serialized CTransaction
24inline constexpr size_t MIN_SERIALIZABLE_TRANSACTION_WEIGHT = WITNESS_SCALE_FACTOR * 10; // 10 is the lower bound for the size of a serialized CTransaction
25
26/** Flags for nSequence and nLockTime locks */
27/** Interpret sequence numbers as relative lock-time constraints. */
28inline constexpr unsigned int LOCKTIME_VERIFY_SEQUENCE = (1 << 0);
29
30/**
31 * Maximum number of seconds that the timestamp of the first
32 * block of a difficulty adjustment period is allowed to
33 * be earlier than the last block of the previous period (BIP94).
34 */
35inline constexpr int64_t MAX_TIMEWARP = 600;
36
37#endif // BITCOIN_CONSENSUS_CONSENSUS_H
38