trezor-firmware/core/tests/test_apps.bitcoin.segwit.bip143.native_p2wpkh.py

from common import *  # isort:skip

from trezor.crypto import bip39
from trezor.enums import InputScriptType, OutputScriptType
from trezor.messages import PrevOutput, SignTx, TxInput, TxOutput

from apps.bitcoin.common import SigHashType
from apps.bitcoin.scripts import output_derive_script
from apps.bitcoin.sign_tx.sig_hasher import BitcoinSigHasher
from apps.bitcoin.writers import get_tx_hash
from apps.common import coins
from apps.common.keychain import Keychain
from apps.common.paths import AlwaysMatchingSchema


class TestSegwitBip143NativeP2WPKH(unittest.TestCase):
    # pylint: disable=C0301

    tx = SignTx(
        coin_name="Bitcoin",
        version=1,
        lock_time=0x00000011,
        inputs_count=2,
        outputs_count=2,
    )
    inp1 = TxInput(
        address_n=[0],
        # Trezor expects hash in reversed format
        prev_hash=unhexlify(
            "9f96ade4b41d5433f4eda31e1738ec2b36f6e7d1420d94a6af99801a88f7f7ff"
        ),
        prev_index=0,
        amount=625000000,  # 6.25 btc
        script_type=InputScriptType.SPENDWITNESS,
        multisig=None,
        sequence=0xFFFFFFEE,
    )
    inp2 = TxInput(
        address_n=[1],
        # Trezor expects hash in reversed format
        prev_hash=unhexlify(
            "8ac60eb9575db5b2d987e29f301b5b819ea83a5c6579d282d189cc04b8e151ef"
        ),
        prev_index=1,
        multisig=None,
        amount=600000000,  # 6 btc
        script_type=InputScriptType.SPENDWITNESS,
        sequence=0xFFFFFFFF,
    )
    out1 = TxOutput(
        address="1Cu32FVupVCgHkMMRJdYJugxwo2Aprgk7H",  # derived
        amount=0x0000000006B22C20,
        script_type=OutputScriptType.PAYTOADDRESS,
        multisig=None,
        address_n=[],
    )
    out2 = TxOutput(
        address="16TZ8J6Q5iZKBWizWzFAYnrsaox5Z5aBRV",  # derived
        amount=0x000000000D519390,
        script_type=OutputScriptType.PAYTOADDRESS,
        multisig=None,
        address_n=[],
    )

    def test_prevouts(self):
        coin = coins.by_name(self.tx.coin_name)
        sig_hasher = BitcoinSigHasher()
        sig_hasher.add_input(self.inp1, b"")
        sig_hasher.add_input(self.inp2, b"")
        prevouts_hash = get_tx_hash(sig_hasher.h_prevouts, double=coin.sign_hash_double)
        self.assertEqual(
            hexlify(prevouts_hash),
            b"96b827c8483d4e9b96712b6713a7b68d6e8003a781feba36c31143470b4efd37",
        )

    def test_sequence(self):
        coin = coins.by_name(self.tx.coin_name)
        sig_hasher = BitcoinSigHasher()
        sig_hasher.add_input(self.inp1, b"")
        sig_hasher.add_input(self.inp2, b"")
        sequence_hash = get_tx_hash(
            sig_hasher.h_sequences, double=coin.sign_hash_double
        )
        self.assertEqual(
            hexlify(sequence_hash),
            b"52b0a642eea2fb7ae638c36f6252b6750293dbe574a806984b8e4d8548339a3b",
        )

    def test_outputs(self):
        coin = coins.by_name(self.tx.coin_name)
        sig_hasher = BitcoinSigHasher()

        for txo in [self.out1, self.out2]:
            script_pubkey = output_derive_script(txo.address, coin)
            txo_bin = PrevOutput(amount=txo.amount, script_pubkey=script_pubkey)
            sig_hasher.add_output(txo_bin, script_pubkey)

        outputs_hash = get_tx_hash(sig_hasher.h_outputs, double=coin.sign_hash_double)
        self.assertEqual(
            hexlify(outputs_hash),
            b"863ef3e1a92afbfdb97f31ad0fc7683ee943e9abcf2501590ff8f6551f47e5e5",
        )

    def test_preimage_testdata(self):

        seed = bip39.seed(
            "alcohol woman abuse must during monitor noble actual mixed trade anger aisle",
            "",
        )
        coin = coins.by_name(self.tx.coin_name)
        sig_hasher = BitcoinSigHasher()
        sig_hasher.add_input(self.inp1, b"")
        sig_hasher.add_input(self.inp2, b"")

        for txo in [self.out1, self.out2]:
            script_pubkey = output_derive_script(txo.address, coin)
            txo_bin = PrevOutput(amount=txo.amount, script_pubkey=script_pubkey)
            sig_hasher.add_output(txo_bin, script_pubkey)

        keychain = Keychain(seed, coin.curve_name, [AlwaysMatchingSchema])
        node = keychain.derive(self.inp2.address_n)

        # test data public key hash
        # only for input 2 - input 1 is not segwit
        result = sig_hasher.hash143(
            self.inp2, [node.public_key()], 1, self.tx, coin, SigHashType.SIGHASH_ALL
        )
        self.assertEqual(
            hexlify(result),
            b"2fa3f1351618b2532228d7182d3221d95c21fd3d496e7e22e9ded873cf022a8b",
        )


if __name__ == "__main__":
    unittest.main()