Module bitcoin::blockdata::constants

Blockdata constants.

This module provides various constants relating to the blockchain and consensus code. In particular, it defines the genesis block and its single transaction.

Structs

• ChainHash
  The uniquely identifying hash of the target blockchain.

Constants

• COINBASE_MATURITY
  Number of blocks needed for an output from a coinbase transaction to be spendable.
• COIN_VALUE
  How many satoshis are in “one bitcoin”.
• DIFFCHANGE_INTERVAL
  How many blocks between diffchanges.
• DIFFCHANGE_TIMESPAN
  How much time on average should occur between diffchanges.
• MAX_BLOCK_SIGOPS_COST
  The maximum allowed number of signature check operations in a block.
• MAX_BLOCK_WEIGHT
  The maximum allowed weight for a block, see BIP 141 (network rule).
• MAX_MONEY
  The maximum value allowed in an output (useful for sanity checking, since keeping everything below this value should prevent overflows if you are doing anything remotely sane with monetary values).
• MAX_SCRIPTNUM_VALUE
  Maximum allowed value for an integer in Script.
• MAX_SCRIPT_ELEMENT_SIZE
  The maximum allowed script size.
• MIN_TRANSACTION_WEIGHT
  The minimum transaction weight for a valid serialized transaction.
• PUBKEY_ADDRESS_PREFIX_MAIN
  Mainnet (bitcoin) pubkey address prefix.
• PUBKEY_ADDRESS_PREFIX_TEST
  Test (tesnet, signet, regtest) pubkey address prefix.
• SCRIPT_ADDRESS_PREFIX_MAIN
  Mainnet (bitcoin) script address prefix.
• SCRIPT_ADDRESS_PREFIX_TEST
  Test (tesnet, signet, regtest) script address prefix.
• SUBSIDY_HALVING_INTERVAL
  How may blocks between halvings.
• TARGET_BLOCK_SPACING
  How many seconds between blocks we expect on average.
• WITNESS_SCALE_FACTOR
  The factor that non-witness serialization data is multiplied by during weight calculation.

Functions

• genesis_block
  Constructs and returns the genesis block.