p2pool/bitcoin/stratum.py

   1 import random
   2 import sys
   3
   4 from twisted.internet import protocol, reactor
   5
   6 from p2pool.bitcoin import data as bitcoin_data, getwork
   7 from p2pool.util import expiring_dict, jsonrpc, pack
   8
   9
  10 class StratumRPCMiningProvider(object):
  11     def __init__(self, wb, other):
  12         self.wb = wb
  13         self.other = other
  14
  15         self.username = None
  16         self.handler_map = expiring_dict.ExpiringDict(300)
  17
  18         self.watch_id = self.wb.new_work_event.watch(self._send_work)
  19
  20     def rpc_subscribe(self):
  21         return [
  22             ["mining.notify", "ae6812eb4cd7735a302a8a9dd95cf71f"], # subscription details
  23             "", # extranonce1
  24             self.wb.COINBASE_NONCE_LENGTH, # extranonce2_size
  25         ]
  26
  27     def rpc_authorize(self, username, password):
  28         self.username = username
  29
  30         reactor.callLater(0, self._send_work)
  31
  32     def _send_work(self):
  33         if self.username is None: # authorize hasn't been received yet
  34             return
  35
  36         x, got_response = self.wb.get_work(*self.wb.preprocess_request(self.username))
  37         jobid = str(random.randrange(2**128))
  38         self.other.svc_mining.rpc_set_difficulty(bitcoin_data.target_to_difficulty(x['share_target'])).addErrback(lambda err: None)
  39         self.other.svc_mining.rpc_notify(
  40             jobid, # jobid
  41             getwork._swap4(pack.IntType(256).pack(x['previous_block'])).encode('hex'), # prevhash
  42             x['coinb1'].encode('hex'), # coinb1
  43             x['coinb2'].encode('hex'), # coinb2
  44             [pack.IntType(256).pack(s).encode('hex') for s in x['merkle_link']['branch']], # merkle_branch
  45             getwork._swap4(pack.IntType(32).pack(x['version'])).encode('hex'), # version
  46             getwork._swap4(pack.IntType(32).pack(x['bits'].bits)).encode('hex'), # nbits
  47             getwork._swap4(pack.IntType(32).pack(x['timestamp'])).encode('hex'), # ntime
  48             True, # clean_jobs
  49         ).addErrback(lambda err: None)
  50         self.handler_map[jobid] = x, got_response
  51
  52     def rpc_submit(self, worker_name, job_id, extranonce2, ntime, nonce):
  53         if job_id not in self.handler_map:
  54             print >>sys.stderr, '''Couldn't link returned work's job id with its handler. This should only happen if this process was recently restarted!'''
  55             return False
  56         x, got_response = self.handler_map[job_id]
  57         coinb_nonce = extranonce2.decode('hex')
  58         assert len(coinb_nonce) == self.wb.COINBASE_NONCE_LENGTH
  59         new_packed_gentx = x['coinb1'] + coinb_nonce + x['coinb2']
  60         header = dict(
  61             version=x['version'],
  62             previous_block=x['previous_block'],
  63             merkle_root=bitcoin_data.check_merkle_link(bitcoin_data.hash256(new_packed_gentx), x['merkle_link']),
  64             timestamp=pack.IntType(32).unpack(getwork._swap4(ntime.decode('hex'))),
  65             bits=x['bits'],
  66             nonce=pack.IntType(32).unpack(getwork._swap4(nonce.decode('hex'))),
  67         )
  68         return got_response(header, worker_name, coinb_nonce)
  69
  70     def close(self):
  71         self.wb.new_work_event.unwatch(self.watch_id)
  72
  73 class StratumProtocol(jsonrpc.LineBasedPeer):
  74     def connectionMade(self):
  75         self.svc_mining = StratumRPCMiningProvider(self.factory.wb, self.other)
  76
  77     def connectionLost(self, reason):
  78         self.svc_mining.close()
  79
  80 class StratumServerFactory(protocol.ServerFactory):
  81     protocol = StratumProtocol
  82
  83     def __init__(self, wb):
  84         self.wb = wb