Function hash256

test/functional/test_framework/util.py:188–193

(byte_str)

    return hexlify(byte_str).decode('ascii')

def hash256(byte_str):
    sha256 = hashlib.sha256()
    sha256.update(byte_str)
    sha256d = hashlib.sha256()
    sha256d.update(sha256.digest())
    return sha256d.digest()[::-1]

def hex_str_to_bytes(hex_str):
    return unhexlify(hex_str.encode('ascii'))