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126 lines
3.9 KiB
126 lines
3.9 KiB
"""
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Script for quick (and repeatable) creation and signing of
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specific inputs and outputs inspired by BTC device tests.
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INPUTS and OUTPUTS lists are the only things needed to be modified.
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Similar to tools/build_tx.py, but more suitable for bigger/autogenerated transactions.
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The serialized transaction can then be announced to network at https://tbtc1.trezor.io/sendtx
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It could be useful to inspect the transaction details at https://live.blockcypher.com/btc/decodetx/
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Usage:
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- modify INPUTS and OUTPUTS lists to suit the needs
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- call the script with possible flags - see `python sign_tx.py --help`
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"""
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import argparse
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from decimal import Decimal
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from typing import Dict, List
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import requests
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from trezorlib import btc, messages
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from trezorlib.client import get_default_client
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from trezorlib.debuglink import TrezorClientDebugLink
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from trezorlib.tools import parse_path
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from trezorlib.transport import enumerate_devices
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parser = argparse.ArgumentParser()
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parser.add_argument(
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"--autoconfirm",
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action="store_true",
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help="Automatically confirm everything on the device.",
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)
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parser.add_argument(
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"--testnet",
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action="store_true",
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help="Use BTC testnet instead of mainnet.",
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)
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args = parser.parse_args()
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# Can choose autoconfirm everything on the device (in the device-tests-style)
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# (Suitable for long/repetitive transactions)
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if args.autoconfirm:
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print("Autoconfirming everything on the device.")
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for device in enumerate_devices():
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try:
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CLIENT = TrezorClientDebugLink(device, auto_interact=True)
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break
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except Exception:
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pass
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else:
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raise RuntimeError("Could not find device")
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else:
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CLIENT = get_default_client()
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# Choosing between Mainnet and Testnet
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if args.testnet:
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COIN = "Testnet"
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URL = "https://tbtc1.trezor.io/api/tx-specific"
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else:
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COIN = "Bitcoin"
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URL = "https://btc1.trezor.io/api/tx-specific"
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print(f"Operating on {COIN} at {URL}")
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# Specific example of generating and signing a transaction with 255 outputs
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# (Could be tried on `all all all...` seed on testnet)
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# (--autoconfirm really helps here)
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INPUTS = [
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messages.TxInputType(
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address_n=parse_path("44h/1h/0h/0/0"), # mvbu1Gdy8SUjTenqerxUaZyYjmveZvt33q
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amount=1_827_955,
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prev_hash=bytes.fromhex(
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"58d56a5d1325cf83543ee4c87fd73a784e4ba1499ced574be359fa2bdcb9ac8e"
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),
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prev_index=1,
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),
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]
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count = 255
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OUTPUTS = [
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messages.TxOutputType(
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address="momtnzR3XqXgDSsFmd8gkGxUiHZLde3RmA", # "44h/1h/0h/0/3"
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amount=(1_827_955 - 10_000) // count,
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script_type=messages.OutputScriptType.PAYTOADDRESS,
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)
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for _ in range(count)
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]
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def get_tx_info(tx_id: str) -> messages.TransactionType:
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"""Fetch basic transaction info for the signing."""
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tx_url = f"{URL}/{tx_id}"
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tx_src = requests.get(tx_url, headers={"user-agent": "tx_cache"}).json(
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parse_float=Decimal
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)
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if "error" in tx_src:
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raise RuntimeError(tx_src["error"])
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return btc.from_json(tx_src)
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def get_prev_txes(
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inputs: List[messages.TxInputType],
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) -> Dict[bytes, messages.TransactionType]:
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"""Get info for all the previous transactions inputs are depending on."""
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prev_txes = {}
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for input in inputs:
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tx_id = input.prev_hash
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if tx_id not in prev_txes:
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prev_txes[tx_id] = get_tx_info(tx_id.hex())
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return prev_txes
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if __name__ == "__main__":
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assert len(INPUTS) > 0, "there are no inputs"
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assert len(OUTPUTS) > 0, "there are no outputs"
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if not all(isinstance(inp, messages.TxInputType) for inp in INPUTS):
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raise RuntimeError("all inputs must be TxInputType")
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if not all(isinstance(out, messages.TxOutputType) for out in OUTPUTS):
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raise RuntimeError("all outputs must be TxOutputType")
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_, serialized_tx = btc.sign_tx(
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CLIENT, COIN, INPUTS, OUTPUTS, prev_txes=get_prev_txes(INPUTS)
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)
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print(80 * "-")
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print(serialized_tx.hex())
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