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

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_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

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_target

In Bitcoind this is insanely described as ~((u256)0 >> 32)