# This file is part of the Trezor project.
#
# Copyright (C) 2012-2019 SatoshiLabs and contributors
#
# This library is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3
# as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the License along with this library.
# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.

import pytest

from trezorlib import btc, messages as proto

from ..common import MNEMONIC12
from ..tx_cache import tx_cache

TXHASH_d5f65e = bytes.fromhex(
    "d5f65ee80147b4bcc70b75e4bbf2d7382021b871bd8867ef8fa525ef50864882"
)


# address_n = [177] < 68
# address_n = [16518] < 66
class TestZerosig:
    @pytest.mark.setup_client(mnemonic=MNEMONIC12)
    def test_one_zero_signature(self, client):
        inp1 = proto.TxInputType(
            address_n=[0],  # 14LmW5k4ssUrtbAB4255zdqv3b4w1TuX9e
            # amount=390000,
            prev_hash=TXHASH_d5f65e,
            prev_index=0,
        )

        # Following address_n has been mined by 'test_mine_zero_signature'
        out1 = proto.TxOutputType(
            address_n=[177],
            amount=390000 - 10000,
            script_type=proto.OutputScriptType.PAYTOADDRESS,
        )

        _, serialized_tx = btc.sign_tx(
            client, "Bitcoin", [inp1], [out1], prev_txes=tx_cache("Bitcoin")
        )
        siglen = serialized_tx[44]

        # Trezor must strip leading zero from signature
        assert siglen == 67

    @pytest.mark.setup_client(mnemonic=MNEMONIC12)
    def test_two_zero_signature(self, client):
        inp1 = proto.TxInputType(
            address_n=[0],  # 14LmW5k4ssUrtbAB4255zdqv3b4w1TuX9e
            # amount=390000,
            prev_hash=TXHASH_d5f65e,
            prev_index=0,
        )

        # Following address_n has been mined by 'test_mine_zero_signature'
        out1 = proto.TxOutputType(
            address_n=[16518],
            amount=390000 - 10000,
            script_type=proto.OutputScriptType.PAYTOADDRESS,
        )

        _, serialized_tx = btc.sign_tx(
            client, "Bitcoin", [inp1], [out1], prev_txes=tx_cache("Bitcoin")
        )
        siglen = serialized_tx[44]

        # Trezor must strip leading zero from signature
        assert siglen == 66