def _Address2PKH(addr): try: addr = b58decode(addr, 25) except: return None if addr is None: return None ver = addr[0] cksumA = addr[-4:] cksumB = blakehash(addr[:-4])[:4] if cksumA != cksumB: return None return (ver, addr[1:-4])
def _Address2PKH(addr):
try:
addr = b58decode(addr, 25)
except:
return None
if addr is None:
return None
ver = addr[0]
cksumA = addr[-4:]
cksumB = blakehash(addr[:-4])[:4]
if cksumA != cksumB:
return None
return (ver, addr[1:-4])
def checkShare(share):
shareTime = share['time'] = time()
username = share['username']
if 'data' in share:
# getwork/GBT
checkData(share)
data = share['data']
if username not in workLog:
raise RejectedShare('unknown-user')
MWL = workLog[username]
shareMerkleRoot = data[36:68]
if 'blkdata' in share:
pl = share['blkdata']
(txncount, pl) = varlenDecode(pl)
cbtxn = bitcoin.txn.Txn(pl)
othertxndata = cbtxn.disassemble(retExtra=True)
coinbase = cbtxn.getCoinbase()
wliPos = coinbase[0] + 2
wliLen = coinbase[wliPos - 1]
wli = coinbase[wliPos:wliPos+wliLen]
mode = 'MC'
moden = 1
else:
wli = shareMerkleRoot
mode = 'MRD'
moden = 0
coinbase = None
else:
# Stratum
MWL = workLog[None]
wli = share['jobid']
buildStratumData(share, b'\0' * 32)
mode = 'MC'
moden = 1
othertxndata = b''
if wli not in MWL:
raise RejectedShare('unknown-work')
(wld, issueT) = MWL[wli]
share[mode] = wld
share['issuetime'] = issueT
(workMerkleTree, workCoinbase) = wld[1:3]
share['merkletree'] = workMerkleTree
if 'jobid' in share:
cbtxn = deepcopy(workMerkleTree.data[0])
coinbase = workCoinbase + share['extranonce1'] + share['extranonce2']
cbtxn.setCoinbase(coinbase)
cbtxn.assemble()
data = buildStratumData(share, workMerkleTree.withFirst(cbtxn))
shareMerkleRoot = data[36:68]
if data in DupeShareHACK:
raise RejectedShare('duplicate')
DupeShareHACK[data] = None
blkhash = blakehash(data)
if blkhash[28:] != b'\0\0\0\0':
print('H-not-zero (%s)' % (username,))
raise RejectedShare('H-not-zero')
blkhashn = LEhash2int(blkhash)
global networkTarget
logfunc = getattr(checkShare.logger, 'info' if blkhashn <= networkTarget else 'debug')
logfunc('BLKHASH: %64x' % (blkhashn,))
logfunc(' TARGET: %64x' % (networkTarget,))
# NOTE: this isn't actually needed for MC mode, but we're abusing it for a trivial share check...
txlist = workMerkleTree.data
txlist = [deepcopy(txlist[0]),] + txlist[1:]
cbtxn = txlist[0]
cbtxn.setCoinbase(coinbase or workCoinbase)
cbtxn.assemble()
if blkhashn <= networkTarget:
logfunc("Submitting upstream")
RBDs.append( deepcopy( (data, txlist, share.get('blkdata', None), workMerkleTree, share, wld) ) )
if not moden:
payload = assembleBlock(data, txlist)
else:
payload = share['data']
if len(othertxndata):
payload += share['blkdata']
else:
payload += assembleBlock(data, txlist)[80:]
logfunc('Real block payload: %s' % (b2a_hex(payload).decode('utf8'),))
RBPs.append(payload)
threading.Thread(target=blockSubmissionThread, args=(payload, blkhash, share)).start()
bcnode.submitBlock(payload)
if config.DelayLogForUpstream:
share['upstreamRejectReason'] = PendingUpstream
else:
share['upstreamRejectReason'] = None
share['upstreamResult'] = True
MM.updateBlock(blkhash)
# Gotwork hack...
if gotwork and blkhashn <= config.GotWorkTarget:
try:
coinbaseMrkl = cbtxn.data
coinbaseMrkl += blkhash
steps = workMerkleTree._steps
coinbaseMrkl += pack('B', len(steps))
for step in steps:
coinbaseMrkl += step
coinbaseMrkl += b"\0\0\0\0"
info = {}
info['hash'] = b2a_hex(blkhash).decode('ascii')
info['header'] = b2a_hex(data).decode('ascii')
info['coinbaseMrkl'] = b2a_hex(coinbaseMrkl).decode('ascii')
thr = threading.Thread(target=submitGotwork, args=(info,))
thr.daemon = True
thr.start()
except:
checkShare.logger.warning('Failed to build gotwork request')
if 'target' in share:
workTarget = share['target']
elif len(wld) > 6:
workTarget = wld[6]
else:
workTarget = None
if workTarget is None:
workTarget = config.ShareTarget
if blkhashn > workTarget:
raise RejectedShare('high-hash')
share['target'] = workTarget
share['_targethex'] = '%064x' % (workTarget,)
shareTimestamp = unpack('<L', data[68:72])[0]
if shareTime < issueT - 120:
raise RejectedShare('stale-work')
if shareTimestamp < shareTime - 300:
raise RejectedShare('time-too-old')
if shareTimestamp > shareTime + 7200:
raise RejectedShare('time-too-new')
if moden:
cbpre = workCoinbase
cbpreLen = len(cbpre)
if coinbase[:cbpreLen] != cbpre:
raise RejectedShare('bad-cb-prefix')
# Filter out known "I support" flags, to prevent exploits
for ff in (b'/P2SH/', b'NOP2SH', b'p2sh/CHV', b'p2sh/NOCHV'):
if coinbase.find(ff) > max(-1, cbpreLen - len(ff)):
raise RejectedShare('bad-cb-flag')
if len(coinbase) > 100:
raise RejectedShare('bad-cb-length')
if shareMerkleRoot != workMerkleTree.withFirst(cbtxn):
raise RejectedShare('bad-txnmrklroot')
if len(othertxndata):
allowed = assembleBlock(data, txlist)[80:]
if allowed != share['blkdata']:
raise RejectedShare('bad-txns')
if config.DynamicTargetting and username in userStatus:
# NOTE: userStatus[username] only doesn't exist across restarts
status = userStatus[username]
target = status[0] or config.ShareTarget
if target == workTarget:
userStatus[username][2] += 1
else:
userStatus[username][2] += float(target) / workTarget
