github.com/btcsuite/btcd/btcutil (go): Package btcutil provides bitcoin-specific convenience functions and types.  A Block defines a bitcoin block that provides easier and more efficient manipulation of raw wire protocol blocks.  It also memoizes hashes for the block and its transactions on their first access so subsequent accesses don't have to repeat the relatively expensive hashing operations.  A Tx defines a bitcoin transaction that provides more efficient manipulation of raw wire protocol transactions.  It memoizes the hash for the transaction on its first access so subsequent accesses don't have to repeat the relatively expensive hashing operations.  The Address interface provides an abstraction for a Bitcoin address.  While the most common type is a pay-to-pubkey-hash, Bitcoin already supports others and may well support more in the future.  This package currently provides implementations for the pay-to-pubkey, pay-to-pubkey-hash, and pay-to-script-hash address types.  To decode/encode an address:
Keywords: bitcoin|btcd|hacktoberfest