mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-30 03:18:20 +00:00
104 lines
2.9 KiB
Python
Executable File
104 lines
2.9 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
# This file is part of the Trezor project.
|
|
#
|
|
# Copyright (C) 2012-2022 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 os
|
|
import sys
|
|
from typing import Any, Optional
|
|
|
|
try:
|
|
import construct as c
|
|
from construct import len_, this
|
|
except ImportError:
|
|
sys.stderr.write(
|
|
"This tool requires Construct. Install it with 'pip install Construct'.\n"
|
|
)
|
|
sys.exit(1)
|
|
|
|
|
|
if os.isatty(sys.stdin.fileno()):
|
|
tx_hex = input("Enter transaction in hex format: ")
|
|
else:
|
|
tx_hex = sys.stdin.read().strip()
|
|
|
|
tx_bin = bytes.fromhex(tx_hex)
|
|
|
|
|
|
CompactUintStruct = c.Struct(
|
|
"base" / c.Int8ul,
|
|
"ext" / c.Switch(this.base, {0xFD: c.Int16ul, 0xFE: c.Int32ul, 0xFF: c.Int64ul}),
|
|
)
|
|
|
|
|
|
class CompactUintAdapter(c.Adapter):
|
|
def _encode(self, obj: int, context: Any, path: Any) -> dict:
|
|
if obj < 0xFD:
|
|
return {"base": obj}
|
|
if obj < 2**16:
|
|
return {"base": 0xFD, "ext": obj}
|
|
if obj < 2**32:
|
|
return {"base": 0xFE, "ext": obj}
|
|
if obj < 2**64:
|
|
return {"base": 0xFF, "ext": obj}
|
|
raise ValueError("Value too big for compact uint")
|
|
|
|
def _decode(self, obj: dict, context: Any, path: Any):
|
|
return obj["ext"] or obj["base"]
|
|
|
|
|
|
class ConstFlag(c.Adapter):
|
|
def __init__(self, const: bytes) -> None:
|
|
self.const = const
|
|
super().__init__(c.Optional(c.Const(const)))
|
|
|
|
def _encode(self, obj: Any, context: Any, path: Any) -> Optional[bytes]:
|
|
return self.const if obj else None
|
|
|
|
def _decode(self, obj: Any, context: Any, path: Any) -> bool:
|
|
return obj is not None
|
|
|
|
|
|
CompactUint = CompactUintAdapter(CompactUintStruct)
|
|
|
|
TxInput = c.Struct(
|
|
"tx" / c.Bytes(32),
|
|
"index" / c.Int32ul,
|
|
# TODO coinbase tx
|
|
"script" / c.Prefixed(CompactUint, c.GreedyBytes),
|
|
"sequence" / c.Int32ul,
|
|
)
|
|
|
|
TxOutput = c.Struct(
|
|
"value" / c.Int64ul,
|
|
"pk_script" / c.Prefixed(CompactUint, c.GreedyBytes),
|
|
)
|
|
|
|
StackItem = c.Prefixed(CompactUint, c.GreedyBytes)
|
|
TxInputWitness = c.PrefixedArray(CompactUint, StackItem)
|
|
|
|
Transaction = c.Struct(
|
|
"version" / c.Int32ul,
|
|
"segwit" / ConstFlag(b"\x00\x01"),
|
|
"inputs" / c.PrefixedArray(CompactUint, TxInput),
|
|
"outputs" / c.PrefixedArray(CompactUint, TxOutput),
|
|
"witness" / c.If(this.segwit, TxInputWitness[len_(this.inputs)]),
|
|
"lock_time" / c.Int32ul,
|
|
c.Terminated,
|
|
)
|
|
|
|
print(Transaction.parse(tx_bin))
|