113 lines
3 KiB
Python
Executable file
113 lines
3 KiB
Python
Executable file
#!/usr/bin/python
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#
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# linearize-hashes.py: List blocks in a linear, no-fork version of the chain.
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#
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# Copyright (c) 2013-2014 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#
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from __future__ import print_function
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import json
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import struct
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import re
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import base64
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import httplib
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import sys
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settings = {}
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class BitcoinRPC:
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def __init__(self, host, port, username, password):
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authpair = "%s:%s" % (username, password)
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self.authhdr = "Basic %s" % (base64.b64encode(authpair))
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self.conn = httplib.HTTPConnection(host, port, False, 30)
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def execute(self, obj):
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self.conn.request('POST', '/', json.dumps(obj),
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{ 'Authorization' : self.authhdr,
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'Content-type' : 'application/json' })
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resp = self.conn.getresponse()
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if resp is None:
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print("JSON-RPC: no response", file=sys.stderr)
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return None
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body = resp.read()
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resp_obj = json.loads(body)
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return resp_obj
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@staticmethod
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def build_request(idx, method, params):
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obj = { 'version' : '1.1',
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'method' : method,
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'id' : idx }
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if params is None:
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obj['params'] = []
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else:
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obj['params'] = params
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return obj
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@staticmethod
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def response_is_error(resp_obj):
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return 'error' in resp_obj and resp_obj['error'] is not None
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def get_block_hashes(settings, max_blocks_per_call=10000):
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rpc = BitcoinRPC(settings['host'], settings['port'],
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settings['rpcuser'], settings['rpcpassword'])
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height = settings['min_height']
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while height < settings['max_height']+1:
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num_blocks = min(settings['max_height']+1-height, max_blocks_per_call)
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batch = []
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for x in range(num_blocks):
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batch.append(rpc.build_request(x, 'getblockhash', [height + x]))
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reply = rpc.execute(batch)
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for x,resp_obj in enumerate(reply):
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if rpc.response_is_error(resp_obj):
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print('JSON-RPC: error at height', height+x, ': ', resp_obj['error'], file=sys.stderr)
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exit(1)
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assert(resp_obj['id'] == x) # assume replies are in-sequence
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print(resp_obj['result'])
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height += num_blocks
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if __name__ == '__main__':
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if len(sys.argv) != 2:
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print("Usage: linearize-hashes.py CONFIG-FILE")
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sys.exit(1)
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f = open(sys.argv[1])
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for line in f:
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# skip comment lines
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m = re.search('^\s*#', line)
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if m:
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continue
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# parse key=value lines
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m = re.search('^(\w+)\s*=\s*(\S.*)$', line)
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if m is None:
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continue
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settings[m.group(1)] = m.group(2)
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f.close()
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if 'host' not in settings:
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settings['host'] = '127.0.0.1'
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if 'port' not in settings:
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settings['port'] = 8332
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if 'min_height' not in settings:
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settings['min_height'] = 0
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if 'max_height' not in settings:
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settings['max_height'] = 313000
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if 'rpcuser' not in settings or 'rpcpassword' not in settings:
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print("Missing username and/or password in cfg file", file=stderr)
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sys.exit(1)
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settings['port'] = int(settings['port'])
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settings['min_height'] = int(settings['min_height'])
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settings['max_height'] = int(settings['max_height'])
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get_block_hashes(settings)
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