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 <cstdint>
10 #include <cstdlib>
11 12 /** The maximum allowed size for a serialized block, in bytes (only for buffer size limits) */
13 static const unsigned int MAX_BLOCK_SERIALIZED_SIZE = 4000000;
14 /** The maximum allowed weight for a block, see BIP 141 (network rule) */
15 static const unsigned int MAX_BLOCK_WEIGHT = 4000000;
16 /** The maximum allowed number of signature check operations in a block (network rule) */
17 static const int64_t MAX_BLOCK_SIGOPS_COST = 80000;
18 /** Coinbase transaction outputs can only be spent after this number of new blocks (network rule) */
19 static const int COINBASE_MATURITY = 100;
20 21 static const int WITNESS_SCALE_FACTOR = 4;
22 23 static const size_t MIN_TRANSACTION_WEIGHT = WITNESS_SCALE_FACTOR * 60; // 60 is the lower bound for the size of a valid serialized CTransaction
24 static const 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. */
28 static 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 */
35 static constexpr int64_t MAX_TIMEWARP = 600;
36 37 #endif // BITCOIN_CONSENSUS_CONSENSUS_H
38