how_to_apply_a_checksum.py

import argparse
import typing

import pycspr


# CLI argument parser.
_ARGS = argparse.ArgumentParser("Illustrates usage of pycspr.checksummer module.")


def _main(args: argparse.Namespace):
    """Main entry point.

    :param args: Parsed command line arguments.

    """
    print("-" * 74)
    print("PYCSPR :: How To Apply A Checksum")
    print("")
    print("Illustrates usage of pycspr.checksummer module.")
    print("-" * 74)

    # Create new key pair & destructure raw public key.
    key_pair: typing.Tuple[bytes, bytes] = \
        pycspr.crypto.get_key_pair(algo=pycspr.DEFAULT_KEY_ALGO)
    pbk: bytes = key_pair[1]

    # Map raw public key -> raw account key.
    account_key: bytes = pycspr.get_account_key(pycspr.DEFAULT_KEY_ALGO, pbk)

    # Use checksummer to checksum account key.
    checksum: str = pycspr.checksummer.encode_account_key(account_key)

    print("Account Key:")
    print(f" ... raw:         {account_key.hex()}")
    print(f" ... checksummed: {checksum}")
    print("-" * 74)


# Entry point.
if __name__ == "__main__":
    _main(_ARGS.parse_args())