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worker_interface.py
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worker_interface.py
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from __future__ import division
import StringIO
import json
import random
import sys
from twisted.internet import defer
import p2pool
from p2pool.bitcoin import data as bitcoin_data, getwork
from p2pool.util import expiring_dict, jsonrpc, pack, variable
class _Provider(object):
def __init__(self, parent, long_poll):
self.parent = parent
self.long_poll = long_poll
def rpc_getwork(self, request, data=None):
return self.parent._getwork(request, data, long_poll=self.long_poll)
class _GETableServer(jsonrpc.HTTPServer):
def __init__(self, provider, render_get_func):
jsonrpc.HTTPServer.__init__(self, provider)
self.render_GET = render_get_func
class WorkerBridge(object):
def __init__(self):
self.new_work_event = variable.Event()
def preprocess_request(self, request):
return request, # *args to self.compute
def get_work(self, request):
raise NotImplementedError()
class WorkerInterface(object):
def __init__(self, worker_bridge):
self.worker_bridge = worker_bridge
self.worker_views = {}
self.merkle_root_to_handler = expiring_dict.ExpiringDict(300)
def attach_to(self, res, get_handler=None):
res.putChild('', _GETableServer(_Provider(self, long_poll=False), get_handler))
def repost(request):
request.content = StringIO.StringIO(json.dumps(dict(id=0, method='getwork')))
return s.render_POST(request)
s = _GETableServer(_Provider(self, long_poll=True), repost)
res.putChild('long-polling', s)
@defer.inlineCallbacks
def _getwork(self, request, data, long_poll):
request.setHeader('X-Long-Polling', '/long-polling')
request.setHeader('X-Roll-NTime', 'expire=100')
request.setHeader('X-Is-P2Pool', 'true')
if request.getHeader('Host') is not None:
request.setHeader('X-Stratum', 'stratum+tcp://' + request.getHeader('Host'))
if data is not None:
header = getwork.decode_data(data)
if header['merkle_root'] not in self.merkle_root_to_handler:
print >>sys.stderr, '''Couldn't link returned work's merkle root with its handler. This should only happen if this process was recently restarted!'''
defer.returnValue(False)
defer.returnValue(self.merkle_root_to_handler[header['merkle_root']](header, request.getUser() if request.getUser() is not None else '', '\0'*self.worker_bridge.COINBASE_NONCE_LENGTH))
if p2pool.DEBUG:
id = random.randrange(1000, 10000)
print 'POLL %i START is_long_poll=%r user_agent=%r user=%r' % (id, long_poll, request.getHeader('User-Agent'), request.getUser())
if long_poll:
request_id = request.getClientIP(), request.getHeader('Authorization')
if self.worker_views.get(request_id, self.worker_bridge.new_work_event.times) != self.worker_bridge.new_work_event.times:
if p2pool.DEBUG:
print 'POLL %i PUSH' % (id,)
else:
if p2pool.DEBUG:
print 'POLL %i WAITING' % (id,)
yield self.worker_bridge.new_work_event.get_deferred()
self.worker_views[request_id] = self.worker_bridge.new_work_event.times
x, handler = self.worker_bridge.get_work(*self.worker_bridge.preprocess_request(request.getUser() if request.getUser() is not None else ''))
res = getwork.BlockAttempt(
version=x['version'],
previous_block=x['previous_block'],
merkle_root=bitcoin_data.check_merkle_link(bitcoin_data.hash256(x['coinb1'] + '\0'*self.worker_bridge.COINBASE_NONCE_LENGTH + x['coinb2']), x['merkle_link']),
timestamp=x['timestamp'],
bits=x['bits'],
share_target=x['share_target'],
)
assert res.merkle_root not in self.merkle_root_to_handler
self.merkle_root_to_handler[res.merkle_root] = handler
if p2pool.DEBUG:
print 'POLL %i END identifier=%i' % (id, self.worker_bridge.new_work_event.times)
extra_params = {}
if request.getHeader('User-Agent') == 'Jephis PIC Miner':
# ASICMINER BE Blades apparently have a buffer overflow bug and
# can't handle much extra in the getwork response
extra_params = {}
else:
extra_params = dict(identifier=str(self.worker_bridge.new_work_event.times), submitold=True)
defer.returnValue(res.getwork(**extra_params))
class CachingWorkerBridge(object):
def __init__(self, inner):
self._inner = inner
self.net = self._inner.net
self.COINBASE_NONCE_LENGTH = (inner.COINBASE_NONCE_LENGTH+1)//2
self.new_work_event = inner.new_work_event
self.preprocess_request = inner.preprocess_request
self._my_bits = (self._inner.COINBASE_NONCE_LENGTH - self.COINBASE_NONCE_LENGTH)*8
self._cache = {}
self._times = None
def get_work(self, *args):
if self._times != self.new_work_event.times:
self._cache = {}
self._times = self.new_work_event.times
if args not in self._cache:
x, handler = self._inner.get_work(*args)
self._cache[args] = x, handler, 0
x, handler, nonce = self._cache.pop(args)
res = (
dict(x, coinb1=x['coinb1'] + pack.IntType(self._my_bits).pack(nonce)),
lambda header, user, coinbase_nonce: handler(header, user, pack.IntType(self._my_bits).pack(nonce) + coinbase_nonce),
)
if nonce + 1 != 2**self._my_bits:
self._cache[args] = x, handler, nonce + 1
return res