Module 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.
• 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_SCRIPTNUM_VALUE
  Maximum allowed value for an integer in Script.
• MAX_SCRIPT_ELEMENT_SIZE
  The maximum allowed script size.
• 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.