text: // Copyright (c) 2009-2010 Satoshi Nakamoto
  // Copyright (c) 2009-2018 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_CONSENSUS_CONSENSUS_H
  #define BITCOIN_CONSENSUS_CONSENSUS_H
  
  #include <stdlib.h>
  #include <stdint.h>
  
  /** The maximum allowed size for a serialized block, in bytes (only for buffer size limits) */
  static const unsigned int MAX_BLOCK_SERIALIZED_SIZE = 4000000;
  /** The maximum allowed weight for a block, see BIP 141 (network rule) */
  static const unsigned int MAX_BLOCK_WEIGHT = 4000000;
  /** The maximum allowed number of signature check operations in a block (network rule) */
  static const int64_t MAX_BLOCK_SIGOPS_COST = 80000;
  /** Coinbase transaction outputs can only be spent after this number of new blocks (network rule) */
  static const int COINBASE_MATURITY = 30;
  
  static const int WITNESS_SCALE_FACTOR = 4;
  
  static const size_t MIN_TRANSACTION_WEIGHT = WITNESS_SCALE_FACTOR * 60; // 60 is the lower bound for the size of a valid serialized CTransaction
  static const size_t MIN_SERIALIZABLE_TRANSACTION_WEIGHT = WITNESS_SCALE_FACTOR * 10; // 10 is the lower bound for the size of a serialized CTransaction
  
  /** Flags for nSequence and nLockTime locks */
  /** Interpret sequence numbers as relative lock-time constraints. */
  static constexpr unsigned int LOCKTIME_VERIFY_SEQUENCE = (1 << 0);
  /** Use GetMedianTimePast() instead of nTime for end point timestamp. */
  static constexpr unsigned int LOCKTIME_MEDIAN_TIME_PAST = (1 << 1);
  
  #endif // BITCOIN_CONSENSUS_CONSENSUS_H
  