mirror of
https://github.com/trezor/trezor-firmware.git
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102 lines
2.8 KiB
Python
102 lines
2.8 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2018 SatoshiLabs and contributors
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3
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# as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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from . import messages as proto
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from .tools import CallException, expect, normalize_nfc, session
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def int_to_big_endian(value):
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return value.to_bytes((value.bit_length() + 7) // 8, "big")
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# ====== Client functions ====== #
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@expect(proto.EthereumAddress, field="address")
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def get_address(client, n, show_display=False, multisig=None):
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return client.call(proto.EthereumGetAddress(address_n=n, show_display=show_display))
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@session
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def sign_tx(
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client,
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n,
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nonce,
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gas_price,
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gas_limit,
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to,
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value,
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data=None,
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chain_id=None,
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tx_type=None,
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):
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msg = proto.EthereumSignTx(
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address_n=n,
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nonce=int_to_big_endian(nonce),
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gas_price=int_to_big_endian(gas_price),
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gas_limit=int_to_big_endian(gas_limit),
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value=int_to_big_endian(value),
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)
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if to:
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msg.to = to
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if data:
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msg.data_length = len(data)
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data, chunk = data[1024:], data[:1024]
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msg.data_initial_chunk = chunk
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if chain_id:
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msg.chain_id = chain_id
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if tx_type is not None:
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msg.tx_type = tx_type
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response = client.call(msg)
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while response.data_length is not None:
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data_length = response.data_length
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data, chunk = data[data_length:], data[:data_length]
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response = client.call(proto.EthereumTxAck(data_chunk=chunk))
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# https://github.com/trezor/trezor-core/pull/311
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# only signature bit returned. recalculate signature_v
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if response.signature_v <= 1:
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response.signature_v += 2 * chain_id + 35
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return response.signature_v, response.signature_r, response.signature_s
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@expect(proto.EthereumMessageSignature)
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def sign_message(client, n, message):
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message = normalize_nfc(message)
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return client.call(proto.EthereumSignMessage(address_n=n, message=message))
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def verify_message(client, address, signature, message):
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message = normalize_nfc(message)
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try:
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resp = client.call(
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proto.EthereumVerifyMessage(
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address=address, signature=signature, message=message
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)
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)
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except CallException as e:
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resp = e
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if isinstance(resp, proto.Success):
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return True
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return False
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