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135 lines
3.9 KiB
135 lines
3.9 KiB
import os
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from decimal import Decimal
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from typing import Sequence, Tuple
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import bitcoin
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import requests
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from bitcoin.core import COutPoint, CScript, CTransaction, CTxIn, CTxOut
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from bitcoin.wallet import CBitcoinAddress
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from trezorlib import messages
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T = messages.RequestType
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def request_input(n: int, tx_hash: bytes = None) -> messages.TxRequest:
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return messages.TxRequest(
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request_type=T.TXINPUT,
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details=messages.TxRequestDetailsType(request_index=n, tx_hash=tx_hash),
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)
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def request_output(n: int, tx_hash: bytes = None) -> messages.TxRequest:
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return messages.TxRequest(
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request_type=T.TXOUTPUT,
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details=messages.TxRequestDetailsType(request_index=n, tx_hash=tx_hash),
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)
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def request_orig_input(n: int, tx_hash: bytes) -> messages.TxRequest:
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return messages.TxRequest(
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request_type=T.TXORIGINPUT,
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details=messages.TxRequestDetailsType(request_index=n, tx_hash=tx_hash),
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)
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def request_orig_output(n: int, tx_hash: bytes) -> messages.TxRequest:
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return messages.TxRequest(
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request_type=T.TXORIGOUTPUT,
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details=messages.TxRequestDetailsType(request_index=n, tx_hash=tx_hash),
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)
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def request_payment_req(n):
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return messages.TxRequest(
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request_type=T.TXPAYMENTREQ,
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details=messages.TxRequestDetailsType(request_index=n),
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)
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def request_meta(tx_hash: bytes) -> messages.TxRequest:
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return messages.TxRequest(
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request_type=T.TXMETA,
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details=messages.TxRequestDetailsType(tx_hash=tx_hash),
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)
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def request_finished() -> messages.TxRequest:
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return messages.TxRequest(request_type=T.TXFINISHED)
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def request_extra_data(ofs: int, len: int, tx_hash: bytes) -> messages.TxRequest:
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return messages.TxRequest(
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request_type=T.TXEXTRADATA,
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details=messages.TxRequestDetailsType(
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tx_hash=tx_hash, extra_data_offset=ofs, extra_data_len=len
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),
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)
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def assert_tx_matches(serialized_tx: bytes, hash_link: str, tx_hex: str = None) -> None:
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"""Verifies if a transaction is correctly formed."""
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tx_id = hash_link.split("/")[-1]
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parsed_tx = CTransaction.deserialize(serialized_tx)
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assert tx_id == parsed_tx.GetTxid()[::-1].hex()
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if tx_hex:
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assert serialized_tx.hex() == tx_hex
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# TODO: we could probably do better than os.environ, this was the easiest solution
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# (we could create a pytest option (and use config.getoption("check-on-chain")),
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# but then each test would need to have access to config via function argument)
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if int(os.environ.get("CHECK_ON_CHAIN", 0)):
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def get_tx_hex(hash_link: str) -> str:
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tx_data = requests.get(
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hash_link, headers={"User-Agent": "BTC transactions test"}
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).json(parse_float=Decimal)
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return tx_data["hex"]
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assert serialized_tx.hex() == get_tx_hex(hash_link)
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def forge_prevtx(
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vouts: Sequence[Tuple[str, int]], network: str = "mainnet"
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) -> Tuple[bytes, messages.TransactionType]:
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"""
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Forge a transaction with the given vouts.
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"""
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bitcoin.SelectParams(network)
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input = messages.TxInputType(
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prev_hash=b"\x00" * 32,
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prev_index=0xFFFFFFFF,
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script_sig=b"\x00",
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sequence=0xFFFFFFFF,
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)
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outputs = [
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messages.TxOutputBinType(
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amount=amount,
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script_pubkey=bytes(CBitcoinAddress(address).to_scriptPubKey()),
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)
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for address, amount in vouts
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]
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tx = messages.TransactionType(
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version=1,
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inputs=[input],
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bin_outputs=outputs,
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lock_time=0,
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)
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cin = CTxIn(
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COutPoint(input.prev_hash, input.prev_index),
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CScript(input.script_sig),
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input.sequence,
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)
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couts = [
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CTxOut(output.amount, CScript(output.script_pubkey))
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for output in tx.bin_outputs
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]
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txhash = CTransaction([cin], couts, tx.lock_time, tx.version).GetTxid()[::-1]
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bitcoin.SelectParams("mainnet")
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return txhash, tx
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