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130 lines
3.1 KiB
Python
130 lines
3.1 KiB
Python
#!/usr/bin/python
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#
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# linearize.py: Construct a linear, no-fork, best version of the blockchain.
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#
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#
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# Copyright (c) 2013 The Bitcoin developers
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# Distributed under the MIT/X11 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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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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ERR_SLEEP = 15
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MAX_NONCE = 1000000L
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settings = {}
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class BitcoinRPC:
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OBJID = 1
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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 rpc(self, method, params=None):
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self.OBJID += 1
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obj = { 'version' : '1.1',
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'method' : method,
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'id' : self.OBJID }
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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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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"
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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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if resp_obj is None:
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print "JSON-RPC: cannot JSON-decode body"
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return None
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if 'error' in resp_obj and resp_obj['error'] != None:
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return resp_obj['error']
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if 'result' not in resp_obj:
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print "JSON-RPC: no result in object"
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return None
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return resp_obj['result']
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def getblock(self, hash, verbose=True):
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return self.rpc('getblock', [hash, verbose])
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def getblockhash(self, index):
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return self.rpc('getblockhash', [index])
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def getblock(rpc, settings, n):
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hash = rpc.getblockhash(n)
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hexdata = rpc.getblock(hash, False)
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data = hexdata.decode('hex')
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return data
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def get_blocks(settings):
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rpc = BitcoinRPC(settings['host'], settings['port'],
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settings['rpcuser'], settings['rpcpass'])
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outf = open(settings['output'], 'wb')
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for height in xrange(settings['max_height']+1):
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data = getblock(rpc, settings, height)
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outhdr = settings['netmagic']
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outhdr += struct.pack("<i", len(data))
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outf.write(outhdr)
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outf.write(data)
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if (height % 1000) == 0:
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sys.stdout.write("Wrote block " + str(height) + "\n")
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if __name__ == '__main__':
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if len(sys.argv) != 2:
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print "Usage: linearize.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 'netmagic' not in settings:
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settings['netmagic'] = 'f9beb4d9'
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if 'output' not in settings:
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settings['output'] = 'bootstrap.dat'
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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 'max_height' not in settings:
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settings['max_height'] = 250000
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if 'rpcuser' not in settings or 'rpcpass' not in settings:
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print "Missing username and/or password in cfg file"
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sys.exit(1)
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settings['netmagic'] = settings['netmagic'].decode('hex')
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settings['port'] = int(settings['port'])
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settings['max_height'] = int(settings['max_height'])
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get_blocks(settings)
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