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contrib/devtools/chainparams/make_chainparams.py
- This file was added.
| Property | Old Value | New Value |
|---|---|---|
| File Mode | null | 100755 |
| #!/usr/bin/env python3 | |||||
| # Copyright (c) 2019 The Bitcoin developers | |||||
| # Distributed under the MIT software license, see the accompanying | |||||
| # file COPYING or http://www.opensource.org/licenses/mit-license.php. | |||||
| from enum import Enum | |||||
| import argparse | |||||
| import os.path | |||||
| import re | |||||
| import sys | |||||
| sys.path.append('../../../test/functional/test_framework') | |||||
| from authproxy import AuthServiceProxy | |||||
| class Chain(Enum): | |||||
| MainNet = "MAINNET" | |||||
| TestNet = "TESTNET" | |||||
| def get_chainparams(rpc_caller, block): | |||||
| # Fetch initial chain info | |||||
| chaininfo = rpc_caller.getblockchaininfo() | |||||
| if chaininfo['chain'] == 'main': | |||||
| chain = Chain.MainNet | |||||
| else: | |||||
| chain = Chain.TestNet | |||||
| # Use highest valid chainwork. This doesn't need to match the block hash | |||||
| # used by assume valid. | |||||
| chainwork = chaininfo['chainwork'] | |||||
| if not re.match('^[0-9a-z]{64}$', chainwork): | |||||
| raise Exception("Chain work is not a valid uint256 hex value.") | |||||
| # Default to N blocks from the chain tip, depending on which chain we're on | |||||
| if not block: | |||||
| block = chaininfo['blocks'] | |||||
| if chain == Chain.MainNet: | |||||
| block -= 10 | |||||
| else: | |||||
| block -= 2000 | |||||
| block = str(block) | |||||
| if not re.match('^[0-9a-z]{64}$', block): | |||||
| if re.match('^[0-9]*$', block): | |||||
| # Fetch block hash using block height | |||||
| block = rpc_caller.getblockhash(int(block)) | |||||
| else: | |||||
| raise Exception("Block hash is not a valid block hash or height.") | |||||
| # Make sure the block hash is part of the chain. This call with raise an | |||||
| # exception if not. | |||||
| rpc_caller.getblockheader(block) | |||||
| return (chainwork, block) | |||||
| def main(args): | |||||
| (chainwork, blockhash) = get_chainparams(args['rpc'], args['block']) | |||||
| output = "{}\n{}\n".format(blockhash, chainwork) | |||||
| return output | |||||
| if __name__ == "__main__": | |||||
| parser = argparse.ArgumentParser(description=( | |||||
| "Make chainparams file." | |||||
| "Prerequisites: RPC access to a bitcoind node.\n\n"), | |||||
| formatter_class=argparse.RawTextHelpFormatter) | |||||
| parser.add_argument('--address', '-a', default="127.0.0.1:8332", | |||||
| help="Node address for making RPC calls.\n" | |||||
| "The chain (MainNet or TestNet) will be automatically detected.\n" | |||||
| "Default: '127.0.0.1:8332'") | |||||
| parser.add_argument('--block', '-b', | |||||
| help="The block hash or height to use for fetching chainparams.\n" | |||||
| "MainNet default: 10 blocks from the chain tip." | |||||
| "TestNet default: 2000 blocks from the chain tip.") | |||||
| parser.add_argument('--config', '-c', default="~/.bitcoin/bitcoin.conf", | |||||
| help="Path to bitcoin.conf for RPC authentication arguments (rpcuser & rpcpassword).\n" | |||||
| "Default: ~/.bitcoin/bitcoin.conf") | |||||
| args = parser.parse_args() | |||||
| args.config = os.path.expanduser(args.config) | |||||
| # Get user and password from config | |||||
| user = None | |||||
| password = None | |||||
| if os.path.isfile(args.config): | |||||
| with open(args.config, 'r', encoding='utf8') as f: | |||||
| for line in f: | |||||
| if line.startswith("rpcuser="): | |||||
| # Ensure that there is only one rpcuser line | |||||
| assert user is None | |||||
| user = line.split("=")[1].strip("\n") | |||||
| if line.startswith("rpcpassword="): | |||||
| # Ensure that there is only one rpcpassword line | |||||
| assert password is None | |||||
| password = line.split("=")[1].strip("\n") | |||||
| else: | |||||
| raise FileNotFoundError("Missing bitcoin.conf") | |||||
| if user is None: | |||||
| raise ValueError("Config is missing rpcuser") | |||||
| if password is None: | |||||
| raise ValueError("Config is missing rpcpassword") | |||||
| args.rpc = AuthServiceProxy( | |||||
| 'http://{}:{}@{}'.format(user, password, args.address)) | |||||
| output = main(vars(args)) | |||||
| if output: | |||||
| print(output) | |||||