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Switch.py
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Switch.py
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from copy import copy
from log import say_exception, say_line, say_quiet
from sha256 import sha256, STATE, partial, calculateF, hash
from struct import pack, unpack
from threading import RLock
from time import time, sleep
from util import if_else, Object, chunks, bytereverse, belowOrEquals
import GetworkSource
import StratumSource
import log
import numpy as np
class Switch(object):
def __init__(self, options):
self.lock = RLock()
self.miners = []
self.options = options
self.last_work = 0
self.update_time = True
self.max_update_time = options.max_update_time
self.backup_server_index = 1
self.errors = 0
self.failback_attempt_count = 0
self.server_index = -1
self.last_server = None
self.server_map = {}
self.user_agent = 'poclbm/' + options.version
self.difficulty = 0
self.true_target = None
self.last_block = ''
self.sent = {}
if self.options.proxy:
self.options.proxy = self.parse_server(self.options.proxy, False)
self.servers = []
for server in self.options.servers:
try:
self.servers.append(self.parse_server(server))
except ValueError:
if self.options.verbose:
say_exception()
say_line("Ignored invalid server entry: %s", server)
continue
def parse_server(self, server, mailAsUser=True):
s = Object()
temp = server.split('://', 1)
if len(temp) == 1:
s.proto = ''; temp = temp[0]
else: s.proto = temp[0]; temp = temp[1]
if mailAsUser:
s.user, temp = temp.split(':', 1)
s.pwd, s.host = temp.split('@')
else:
temp = temp.split('@', 1)
if len(temp) == 1:
s.user = ''
s.pwd = ''
s.host = temp[0]
else:
if temp[0].find(':') <> -1:
s.user, s.pwd = temp[0].split(':')
else:
s.user = temp[0]
s.pwd = ''
s.host = temp[1]
if s.host.find('#') != -1:
s.host, s.name = s.host.split('#')
else: s.name = s.host
return s
def add_miner(self, miner):
self.miners.append(miner)
miner.switch = self
def updatable_miner(self):
for miner in self.miners:
if miner.update:
miner.update = False
return miner
def loop(self):
self.should_stop = False
if not self.servers:
print '\nAt least one server is required'
return
else:
self.set_server_index(0)
while True:
if self.should_stop: return
failback = self.server_source().loop()
sleep(1)
if failback:
say_line("Attempting to fail back to primary server")
self.last_server = self.server_index
self.set_server_index(0)
continue
if self.last_server:
self.failback_attempt_count += 1
self.set_server_index(self.last_server)
say_line('Still unable to reconnect to primary server (attempt %s), failing over', self.failback_attempt_count)
self.last_server = None
continue
self.errors += 1
say_line('IO errors - %s, tolerance %s', (self.errors, self.options.tolerance))
if self.errors > self.options.tolerance:
self.errors = 0
if self.backup_server_index >= len(self.servers):
say_line("No more backup servers left. Using primary and starting over.")
new_server_index = 0
self.backup_server_index = 1
else:
new_server_index = self.backup_server_index
self.backup_server_index += 1
self.set_server_index(new_server_index)
def connection_ok(self):
self.errors = 0
if self.server_index == 0:
self.backup_server_index = 1
self.failback_attempt_count = 0
def stop(self):
self.should_stop = True
if self.server_index != -1:
self.server_source().stop()
#callers must provide hex encoded block header and target
def decode(self, server, block_header, target, job_id = None, extranonce2 = None):
if block_header:
job = Object()
binary_data = block_header.decode('hex')
data0 = np.zeros(64, np.uint32)
data0 = np.insert(data0, [0] * 16, unpack('IIIIIIIIIIIIIIII', binary_data[:64]))
job.target = np.array(unpack('IIIIIIII', target.decode('hex')), dtype=np.uint32)
job.header = binary_data[:68]
job.merkle_end = np.uint32(unpack('I', binary_data[64:68])[0])
job.time = np.uint32(unpack('I', binary_data[68:72])[0])
job.difficulty = np.uint32(unpack('I', binary_data[72:76])[0])
job.state = sha256(STATE, data0)
job.f = np.zeros(8, np.uint32)
job.state2 = partial(job.state, job.merkle_end, job.time, job.difficulty, job.f)
job.targetQ = 2**256 / int(''.join(list(chunks(target, 2))[::-1]), 16)
job.job_id = job_id
job.extranonce2 = extranonce2
job.server = server
calculateF(job.state, job.merkle_end, job.time, job.difficulty, job.f, job.state2)
if job.difficulty != self.difficulty:
self.set_difficulty(job.difficulty)
return job
def set_difficulty(self, difficulty):
self.difficulty = difficulty
bits = '%08x' % difficulty.byteswap()
true_target = '%064x' % (int(bits[2:], 16) * 2 ** (8 * (int(bits[:2], 16) - 3)),)
true_target = ''.join(list(chunks(true_target, 2))[::-1])
self.true_target = np.array(unpack('IIIIIIII', true_target.decode('hex')), dtype=np.uint32)
def send(self, result, send_callback):
for nonce in result.miner.nonce_generator(result.nonces):
h = hash(result.state, result.merkle_end, result.time, result.difficulty, nonce)
if h[7] != 0:
hash6 = pack('I', long(h[6])).encode('hex')
say_line('Verification failed, check hardware! (%s, %s)', (result.miner.id(), hash6))
return True # consume this particular result
else:
self.diff1_found(bytereverse(h[6]), result.target[6])
if belowOrEquals(h[:7], result.target[:7]):
is_block = belowOrEquals(h[:7], self.true_target[:7])
hash6 = pack('I', long(h[6])).encode('hex')
hash5 = pack('I', long(h[5])).encode('hex')
self.sent[nonce] = (is_block, hash6, hash5)
if not send_callback(result, nonce):
return False
return True
def diff1_found(self, hash_, target):
if self.options.verbose and target < 0xFFFF0000L:
say_line('checking %s <= %s', (hash_, target))
def status_updated(self, miner):
verbose = self.options.verbose
rate = if_else(verbose, miner.rate, sum([m.rate for m in self.miners]))
estimated_rate = if_else(verbose, miner.estimated_rate, sum([m.estimated_rate for m in self.miners]))
rejected_shares = if_else(verbose, miner.share_count[0], sum([m.share_count[0] for m in self.miners]))
total_shares = rejected_shares + if_else(verbose, miner.share_count[1], sum([m.share_count[1] for m in self.miners]))
total_shares_estimator = max(total_shares, 1)
say_quiet('%s[%.03f MH/s (~%d MH/s)] [Rej: %d/%d (%.02f%%)]', (if_else(verbose, miner.id()+' ', '') , rate, round(estimated_rate), rejected_shares, total_shares, float(rejected_shares) * 100 / total_shares_estimator))
def report(self, miner, nonce, accepted):
is_block, hash6, hash5 = self.sent[nonce]
miner.share_count[if_else(accepted, 1, 0)] += 1
hash_ = if_else(is_block, hash6 + hash5, hash6)
if self.options.verbose or is_block:
say_line('%s %s%s, %s', (miner.id(), if_else(is_block, 'block ', ''), hash_, if_else(accepted, 'accepted', '_rejected_')))
del self.sent[nonce]
def set_server_index(self, server_index):
self.server_index = server_index
user = self.servers[server_index].user
name = self.servers[server_index].name
#say_line('Setting server %s (%s @ %s)', (name, user, host))
say_line('Setting server (%s @ %s)', (user, name))
log.server = name
def add_servers(self, hosts):
for host in hosts[::-1]:
port = str(host['port'])
if not self.has_server(self.server().user, host['host'], port):
server = copy(self.server())
server.host = ''.join([host['host'], ':', port])
server.source = None
self.servers.insert(self.backup_server_index, server)
def has_server(self, user, host, port):
for server in self.servers:
server_host, server_port = self.server().host.split(':', 1)
if server.user == user and server_host == host and server_port == port:
return True
return False
def queue_work(self, server, block_header, target = None, job_id = None, extranonce2 = None, miner=None):
work = self.decode(server, block_header, target, job_id, extranonce2)
with self.lock:
if not miner:
miner = self.miners[0]
for i in xrange(1, len(self.miners)):
self.miners[i].update = True
miner.work_queue.put(work)
if work:
miner.update = False; self.last_work = time()
if self.last_block != work.header[25:29]:
self.last_block = work.header[25:29]
self.clear_result_queue(server)
def clear_result_queue(self, server):
while not server.result_queue.empty():
server.result_queue.get(False)
def server_source(self):
if not hasattr(self.server(), 'source'):
if self.server().proto == 'stratum':
self.add_stratum_source()
else:
getwork_source = GetworkSource.GetworkSource(self)
say_line('checking for stratum...')
stratum_host = getwork_source.detect_stratum()
if stratum_host:
getwork_source.close_connection()
self.server().proto = 'stratum'
self.server().host = stratum_host
self.add_stratum_source()
else:
self.server().source = getwork_source
return self.server().source
def add_stratum_source(self):
if self.options.stratum_proxies:
stratum_proxy = StratumSource.detect_stratum_proxy(self.server().host)
if stratum_proxy:
original_server = copy(self.server())
original_server.source = StratumSource.StratumSource(self)
self.servers.insert(self.backup_server_index, original_server)
self.server().host = stratum_proxy
self.server().name += '(p)'
log.server = self.server().name
else:
say_line('No proxy found')
self.server().source = StratumSource.StratumSource(self)
def server(self):
return self.servers[self.server_index]
def put(self, result):
result.server.result_queue.put(result)