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136 lines
4.3 KiB
136 lines
4.3 KiB
#!/usr/bin/env python3
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# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2019 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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import json
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import sys
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from decimal import Decimal
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from pathlib import Path
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import click
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import requests
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from trezorlib import btc, messages, protobuf
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REPOSITORY_ROOT = Path(__file__).resolve().parent.parent
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TOOLS_PATH = REPOSITORY_ROOT / "common" / "tools"
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CACHE_PATH = Path(__file__).resolve().parent / "txcache"
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sys.path.insert(0, str(TOOLS_PATH))
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from coin_info import coin_info # isort:skip
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def _get_blockbooks():
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"""Make a list of blockbook URL patterns available.
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Only used to prefill the BLOCKBOOKS variable.
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"""
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coins = coin_info().bitcoin
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res = {}
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for coin in coins:
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if not coin.get("blockbook"):
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continue
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res[coin["coin_name"].lower()] = coin["blockbook"][0] + "/api/tx-specific/{}"
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return res
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BLOCKBOOKS = _get_blockbooks()
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class TxCache:
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def __init__(self, coin_name: str) -> None:
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self.slug = coin_name.lower().replace(" ", "_")
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def get_tx(self, txhash: str) -> messages.TransactionType:
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try:
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(CACHE_PATH / self.slug).mkdir()
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except Exception:
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pass
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cache_file = CACHE_PATH / self.slug / f"{txhash}.json"
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if not cache_file.exists():
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raise RuntimeError(
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f"cache miss for {self.slug} tx {txhash}.\n"
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"To fix, refer to ./tests/tx_cache.py --help"
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)
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txdict = json.loads(cache_file.read_text())
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return protobuf.dict_to_proto(messages.TransactionType, txdict)
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def __getitem__(self, key: bytes) -> messages.TransactionType:
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return self.get_tx(key.hex())
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def __contains__(self, key: bytes) -> bool:
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try:
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self.get_tx(key.hex())
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return True
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except Exception:
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return False
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@click.command()
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@click.argument("coin_name")
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@click.argument("tx", metavar="TXHASH_OR_URL")
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def cli(tx, coin_name):
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"""Add a transaction to the cache.
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\b
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Without URL, default blockbook server will be used:
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./tests/tx_cache.py bcash bc37c28dfb467d2ecb50261387bf752a3977d7e5337915071bb4151e6b711a78
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It is also possible to specify URL explicitly:
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./tests/tx_cache.py bcash https://bch1.trezor.io/api/tx-specific/bc37c28dfb467d2ecb50261387bf752a3977d7e5337915071bb4151e6b711a78
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The transaction will be parsed into Trezor format and saved in
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tests/txcache/<COIN_NAME>/<TXHASH>.json. Note that only Bitcoin-compatible fields
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will be filled out. If you are adding a coin with special fields (Dash, Zcash...),
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it is your responsibility to fill out the missing fields properly.
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"""
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if tx.startswith("http"):
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tx_url = tx
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tx_hash = tx.split("/")[-1].lower()
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elif coin_name not in BLOCKBOOKS:
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raise click.ClickException(
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f"Could not find blockbook for {coin_name}. Please specify a full URL."
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)
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else:
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tx_hash = tx.lower()
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tx_url = BLOCKBOOKS[coin_name].format(tx)
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click.echo(f"Fetching from {tx_url}...")
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try:
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# Get transaction from Blockbook server. The servers refuse requests with an empty user agent.
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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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tx_proto = btc.from_json(tx_src)
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tx_dict = protobuf.to_dict(tx_proto)
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tx_json = json.dumps(tx_dict, sort_keys=True, indent=2) + "\n"
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except Exception as e:
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raise click.ClickException(str(e)) from e
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cache_dir = CACHE_PATH / coin_name
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if not cache_dir.exists():
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cache_dir.mkdir()
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(cache_dir / f"{tx_hash}.json").write_text(tx_json)
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click.echo(tx_json)
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if __name__ == "__main__":
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cli()
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