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Diffstat (limited to 'contrib/linearize/linearize-hashes.py')
| -rwxr-xr-x | contrib/linearize/linearize-hashes.py | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/contrib/linearize/linearize-hashes.py b/contrib/linearize/linearize-hashes.py new file mode 100755 index 0000000000..58fec6dddc --- /dev/null +++ b/contrib/linearize/linearize-hashes.py @@ -0,0 +1,157 @@ +#!/usr/bin/env python3 +# +# linearize-hashes.py: List blocks in a linear, no-fork version of the chain. +# +# Copyright (c) 2013-2016 The Bitcoin Core developers +# Distributed under the MIT software license, see the accompanying +# file COPYING or http://www.opensource.org/licenses/mit-license.php. +# + +from __future__ import print_function +try: # Python 3 + import http.client as httplib +except ImportError: # Python 2 + import httplib +import json +import re +import base64 +import sys +import os +import os.path + +settings = {} + +##### Switch endian-ness ##### +def hex_switchEndian(s): + """ Switches the endianness of a hex string (in pairs of hex chars) """ + pairList = [s[i:i+2].encode() for i in range(0, len(s), 2)] + return b''.join(pairList[::-1]).decode() + +class BitcoinRPC: + def __init__(self, host, port, username, password): + authpair = "%s:%s" % (username, password) + authpair = authpair.encode('utf-8') + self.authhdr = b"Basic " + base64.b64encode(authpair) + self.conn = httplib.HTTPConnection(host, port=port, timeout=30) + + def execute(self, obj): + try: + self.conn.request('POST', '/', json.dumps(obj), + { 'Authorization' : self.authhdr, + 'Content-type' : 'application/json' }) + except ConnectionRefusedError: + print('RPC connection refused. Check RPC settings and the server status.', + file=sys.stderr) + return None + + resp = self.conn.getresponse() + if resp is None: + print("JSON-RPC: no response", file=sys.stderr) + return None + + body = resp.read().decode('utf-8') + resp_obj = json.loads(body) + return resp_obj + + @staticmethod + def build_request(idx, method, params): + obj = { 'version' : '1.1', + 'method' : method, + 'id' : idx } + if params is None: + obj['params'] = [] + else: + obj['params'] = params + return obj + + @staticmethod + def response_is_error(resp_obj): + return 'error' in resp_obj and resp_obj['error'] is not None + +def get_block_hashes(settings, max_blocks_per_call=10000): + rpc = BitcoinRPC(settings['host'], settings['port'], + settings['rpcuser'], settings['rpcpassword']) + + height = settings['min_height'] + while height < settings['max_height']+1: + num_blocks = min(settings['max_height']+1-height, max_blocks_per_call) + batch = [] + for x in range(num_blocks): + batch.append(rpc.build_request(x, 'getblockhash', [height + x])) + + reply = rpc.execute(batch) + if reply is None: + print('Cannot continue. Program will halt.') + return None + + for x,resp_obj in enumerate(reply): + if rpc.response_is_error(resp_obj): + print('JSON-RPC: error at height', height+x, ': ', resp_obj['error'], file=sys.stderr) + sys.exit(1) + assert(resp_obj['id'] == x) # assume replies are in-sequence + if settings['rev_hash_bytes'] == 'true': + resp_obj['result'] = hex_switchEndian(resp_obj['result']) + print(resp_obj['result']) + + height += num_blocks + +def get_rpc_cookie(): + # Open the cookie file + with open(os.path.join(os.path.expanduser(settings['datadir']), '.cookie'), 'r') as f: + combined = f.readline() + combined_split = combined.split(":") + settings['rpcuser'] = combined_split[0] + settings['rpcpassword'] = combined_split[1] + +if __name__ == '__main__': + if len(sys.argv) != 2: + print("Usage: linearize-hashes.py CONFIG-FILE") + sys.exit(1) + + f = open(sys.argv[1]) + for line in f: + # skip comment lines + m = re.search('^\s*#', line) + if m: + continue + + # parse key=value lines + m = re.search('^(\w+)\s*=\s*(\S.*)$', line) + if m is None: + continue + settings[m.group(1)] = m.group(2) + f.close() + + if 'host' not in settings: + settings['host'] = '127.0.0.1' + if 'port' not in settings: + settings['port'] = 8332 + if 'min_height' not in settings: + settings['min_height'] = 0 + if 'max_height' not in settings: + settings['max_height'] = 313000 + if 'rev_hash_bytes' not in settings: + settings['rev_hash_bytes'] = 'false' + + use_userpass = True + use_datadir = False + if 'rpcuser' not in settings or 'rpcpassword' not in settings: + use_userpass = False + if 'datadir' in settings and not use_userpass: + use_datadir = True + if not use_userpass and not use_datadir: + print("Missing datadir or username and/or password in cfg file", file=sys.stderr) + sys.exit(1) + + settings['port'] = int(settings['port']) + settings['min_height'] = int(settings['min_height']) + settings['max_height'] = int(settings['max_height']) + + # Force hash byte format setting to be lowercase to make comparisons easier. + settings['rev_hash_bytes'] = settings['rev_hash_bytes'].lower() + + # Get the rpc user and pass from the cookie if the datadir is set + if use_datadir: + get_rpc_cookie() + + get_block_hashes(settings) |