#!/usr/bin/env python3 # Copyright (c) 2016-2022 The Bitcoin Core developers # Distributed under the MIT software license, see the accompanying # file COPYING or http://www.opensource.org/licenses/mit-license.php. """Encode and decode Bitcoin addresses. - base58 P2PKH and P2SH addresses. - bech32 segwit v0 P2WPKH and P2WSH addresses. - bech32m segwit v1 P2TR addresses.""" import enum import unittest from .script import ( CScript, OP_0, OP_TRUE, hash160, hash256, sha256, taproot_construct, ) from .util import assert_equal from test_framework.script_util import ( keyhash_to_p2pkh_script, program_to_witness_script, scripthash_to_p2sh_script, ) from test_framework.segwit_addr import ( decode_segwit_address, encode_segwit_address, ) ADDRESS_BCRT1_UNSPENDABLE = 'bcrt1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3xueyj' ADDRESS_BCRT1_UNSPENDABLE_DESCRIPTOR = 'addr(bcrt1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3xueyj)#juyq9d97' # Coins sent to this address can be spent with a witness stack of just OP_TRUE ADDRESS_BCRT1_P2WSH_OP_TRUE = 'bcrt1qft5p2uhsdcdc3l2ua4ap5qqfg4pjaqlp250x7us7a8qqhrxrxfsqseac85' class AddressType(enum.Enum): bech32 = 'bech32' p2sh_segwit = 'p2sh-segwit' legacy = 'legacy' # P2PKH b58chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz' def create_deterministic_address_bcrt1_p2tr_op_true(): """ Generates a deterministic bech32m address (segwit v1 output) that can be spent with a witness stack of OP_TRUE and the control block with internal public key (script-path spending). Returns a tuple with the generated address and the internal key. """ internal_key = (1).to_bytes(32, 'big') address = output_key_to_p2tr(taproot_construct(internal_key, [(None, CScript([OP_TRUE]))]).output_pubkey) assert_equal(address, 'bcrt1p9yfmy5h72durp7zrhlw9lf7jpwjgvwdg0jr0lqmmjtgg83266lqsekaqka') return (address, internal_key) def byte_to_base58(b, version): result = '' b = bytes([version]) + b # prepend version b += hash256(b)[:4] # append checksum value = int.from_bytes(b, 'big') while value > 0: result = b58chars[value % 58] + result value //= 58 while b[0] == 0: result = b58chars[0] + result b = b[1:] return result def base58_to_byte(s): """Converts a base58-encoded string to its data and version. Throws if the base58 checksum is invalid.""" if not s: return b'' n = 0 for c in s: n *= 58 assert c in b58chars digit = b58chars.index(c) n += digit h = '%x' % n if len(h) % 2: h = '0' + h res = n.to_bytes((n.bit_length() + 7) // 8, 'big') pad = 0 for c in s: if c == b58chars[0]: pad += 1 else: break res = b'\x00' * pad + res if hash256(res[:-4])[:4] != res[-4:]: raise ValueError('Invalid Base58Check checksum') return res[1:-4], int(res[0]) def keyhash_to_p2pkh(hash, main=False): assert len(hash) == 20 version = 0 if main else 111 return byte_to_base58(hash, version) def scripthash_to_p2sh(hash, main=False): assert len(hash) == 20 version = 5 if main else 196 return byte_to_base58(hash, version) def key_to_p2pkh(key, main=False): key = check_key(key) return keyhash_to_p2pkh(hash160(key), main) def script_to_p2sh(script, main=False): script = check_script(script) return scripthash_to_p2sh(hash160(script), main) def key_to_p2sh_p2wpkh(key, main=False): key = check_key(key) p2shscript = CScript([OP_0, hash160(key)]) return script_to_p2sh(p2shscript, main) def program_to_witness(version, program, main=False): if (type(program) is str): program = bytes.fromhex(program) assert 0 <= version <= 16 assert 2 <= len(program) <= 40 assert version > 0 or len(program) in [20, 32] return encode_segwit_address("bc" if main else "bcrt", version, program) def script_to_p2wsh(script, main=False): script = check_script(script) return program_to_witness(0, sha256(script), main) def key_to_p2wpkh(key, main=False): key = check_key(key) return program_to_witness(0, hash160(key), main) def script_to_p2sh_p2wsh(script, main=False): script = check_script(script) p2shscript = CScript([OP_0, sha256(script)]) return script_to_p2sh(p2shscript, main) def output_key_to_p2tr(key, main=False): assert len(key) == 32 return program_to_witness(1, key, main) def check_key(key): if (type(key) is str): key = bytes.fromhex(key) # Assuming this is hex string if (type(key) is bytes and (len(key) == 33 or len(key) == 65)): return key assert False def check_script(script): if (type(script) is str): script = bytes.fromhex(script) # Assuming this is hex string if (type(script) is bytes or type(script) is CScript): return script assert False def bech32_to_bytes(address): hrp = address.split('1')[0] if hrp not in ['bc', 'tb', 'bcrt']: return (None, None) version, payload = decode_segwit_address(hrp, address) if version is None: return (None, None) return version, bytearray(payload) def address_to_scriptpubkey(address): """Converts a given address to the corresponding output script (scriptPubKey).""" version, payload = bech32_to_bytes(address) if version is not None: return program_to_witness_script(version, payload) # testnet segwit scriptpubkey payload, version = base58_to_byte(address) if version == 111: # testnet pubkey hash return keyhash_to_p2pkh_script(payload) elif version == 196: # testnet script hash return scripthash_to_p2sh_script(payload) # TODO: also support other address formats else: assert False class TestFrameworkScript(unittest.TestCase): def test_base58encodedecode(self): def check_base58(data, version): self.assertEqual(base58_to_byte(byte_to_base58(data, version)), (data, version)) check_base58(bytes.fromhex('1f8ea1702a7bd4941bca0941b852c4bbfedb2e05'), 111) check_base58(bytes.fromhex('3a0b05f4d7f66c3ba7009f453530296c845cc9cf'), 111) check_base58(bytes.fromhex('41c1eaf111802559bad61b60d62b1f897c63928a'), 111) check_base58(bytes.fromhex('0041c1eaf111802559bad61b60d62b1f897c63928a'), 111) check_base58(bytes.fromhex('000041c1eaf111802559bad61b60d62b1f897c63928a'), 111) check_base58(bytes.fromhex('00000041c1eaf111802559bad61b60d62b1f897c63928a'), 111) check_base58(bytes.fromhex('1f8ea1702a7bd4941bca0941b852c4bbfedb2e05'), 0) check_base58(bytes.fromhex('3a0b05f4d7f66c3ba7009f453530296c845cc9cf'), 0) check_base58(bytes.fromhex('41c1eaf111802559bad61b60d62b1f897c63928a'), 0) check_base58(bytes.fromhex('0041c1eaf111802559bad61b60d62b1f897c63928a'), 0) check_base58(bytes.fromhex('000041c1eaf111802559bad61b60d62b1f897c63928a'), 0) check_base58(bytes.fromhex('00000041c1eaf111802559bad61b60d62b1f897c63928a'), 0) def test_bech32_decode(self): def check_bech32_decode(payload, version): hrp = "tb" self.assertEqual(bech32_to_bytes(encode_segwit_address(hrp, version, payload)), (version, payload)) check_bech32_decode(bytes.fromhex('36e3e2a33f328de12e4b43c515a75fba2632ecc3'), 0) check_bech32_decode(bytes.fromhex('823e9790fc1d1782321140d4f4aa61aabd5e045b'), 0) check_bech32_decode(bytes.fromhex('79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798'), 1) check_bech32_decode(bytes.fromhex('39cf8ebd95134f431c39db0220770bd127f5dd3cc103c988b7dcd577ae34e354'), 1) check_bech32_decode(bytes.fromhex('708244006d27c757f6f1fc6f853b6ec26268b727866f7ce632886e34eb5839a3'), 1) check_bech32_decode(bytes.fromhex('616211ab00dffe0adcb6ce258d6d3fd8cbd901e2'), 0) check_bech32_decode(bytes.fromhex('b6a7c98b482d7fb21c9fa8e65692a0890410ff22'), 0) check_bech32_decode(bytes.fromhex('f0c2109cb1008cfa7b5a09cc56f7267cd8e50929'), 0)