trezor-firmware/core/tests/test_apps.bitcoin.sign_tx.writers.py

from common import *  # isort:skip

from trezor.enums import InputScriptType
from trezor.messages import TxInput

from apps.bitcoin import writers


class TestWriters(unittest.TestCase):
    def test_tx_input(self):
        inp = TxInput(
            address_n=[0],
            amount=390000,
            prev_hash=unhexlify(
                "d5f65ee80147b4bcc70b75e4bbf2d7382021b871bd8867ef8fa525ef50864882"
            ),
            prev_index=0,
            sequence=0xFFFFFFFF,
            script_sig=b"0123456789",
        )

        b = bytearray()
        writers.write_tx_input(b, inp, inp.script_sig)
        self.assertEqual(len(b), 32 + 4 + 1 + 10 + 4)

        for bad_prevhash in (b"", b"x", b"hello", b"x" * 33):
            inp.prev_hash = bad_prevhash
            self.assertRaises(
                AssertionError, writers.write_tx_input, b, inp, inp.script_sig
            )

    def test_tx_input_check(self):
        inp = TxInput(
            address_n=[0],
            amount=390000,
            prev_hash=unhexlify(
                "d5f65ee80147b4bcc70b75e4bbf2d7382021b871bd8867ef8fa525ef50864882"
            ),
            prev_index=0,
            script_type=InputScriptType.SPENDWITNESS,
            sequence=0xFFFFFFFF,
            script_pubkey=unhexlify(
                "76a91424a56db43cf6f2b02e838ea493f95d8d6047423188ac"
            ),
            script_sig=b"0123456789",
        )

        b = bytearray()
        writers.write_tx_input_check(b, inp)
        self.assertEqual(
            len(b), 4 + 4 + 32 + 4 + 11 + 4 + 4 + 1 + 8 + 1 + 1 + 1 + 4 + 26
        )

        for bad_prevhash in (b"", b"x", b"hello", b"x" * 33):
            inp.prev_hash = bad_prevhash
            self.assertRaises(AssertionError, writers.write_tx_input_check, b, inp)


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