Topic: [ANN][GRS] Groestlcoin | 1st to activate Segwit | Building Lightning Network - page 287. (Read 558244 times)

   def submit_share(self, job_id, worker_name, session, extranonce1_bin, extranonce2, ntime, nonce,
                     difficulty, ip=False):
        '''Check parameters and finalize block template. If it leads
           to valid block candidate, asynchronously submits the block
           back to the bitcoin network.
        
            - extranonce1_bin is binary. No checks performed, it should be from session data
            - job_id, extranonce2, ntime, nonce - in hex form sent by the client
            - difficulty - decimal number from session
            - submitblock_callback - reference to method which receive result of submitblock()
            - difficulty is checked to see if its lower than the vardiff minimum target or pool target
              from conf/config.py and if it is the share is rejected due to it not meeting the requirements for a share
              
        '''
            # Share Diff Should never be 0
        if difficulty < settings.POOL_TARGET:
                log.exception("Worker %s @ IP: %s seems to be submitting Fake Shares"%(worker_name,ip))
                raise SubmitException("Diff is %s Share Rejected Reporting to Admin"%(difficulty))

        # Check if extranonce2 looks correctly. extranonce2 is in hex form...
        if len(extranonce2) != self.extranonce2_size * 2:
            raise SubmitException("Incorrect size of extranonce2. Expected %d chars" % (self.extranonce2_size*2))

        # Check for job
        job = self.get_job(job_id, worker_name, ip)
        if job == None:
            raise SubmitException("Job '%s' not found" % job_id)

        # Check if ntime looks correct
        if len(ntime) != 8:
            raise SubmitException("Incorrect size of ntime. Expected 8 chars")

        if not job.check_ntime(int(ntime, 16)):
            raise SubmitException("Ntime out of range")

        # Check nonce        
        if len(nonce) != 8:
            raise SubmitException("Incorrect size of nonce. Expected 8 chars")

        # Check for duplicated submit
        if not job.register_submit(extranonce1_bin, extranonce2, ntime, nonce):
            log.info("Duplicate from %s, (%s %s %s %s)" % \
                    (worker_name, binascii.hexlify(extranonce1_bin), extranonce2, ntime, nonce))
            raise SubmitException("Duplicate share")


        # Now let's do the hard work!
        # ---------------------------

        # 0. Some sugar
        extranonce2_bin = binascii.unhexlify(extranonce2)
        ntime_bin = binascii.unhexlify(ntime)
        nonce_bin = binascii.unhexlify(nonce)

        # 1. Build coinbase
        coinbase_bin = job.serialize_coinbase(extranonce1_bin, extranonce2_bin)
        coinbase_hash = util.doublesha(coinbase_bin)

        # 2. Calculate merkle root
        merkle_root_bin = job.merkletree.withFirst(coinbase_hash)
        merkle_root_int = util.uint256_from_str(merkle_root_bin)

        # 3. Serialize header with given merkle, ntime and nonce
        header_bin = job.serialize_header(merkle_root_int, ntime_bin, nonce_bin)

        # 4. Reverse header and compare it with target of the user

        if settings.COINDAEMON_ALGO == 'scrypt':
            hash_bin = ltc_scrypt.getPoWHash(''.join([ header_bin[i*4:i*4+4][::-1] for i in range(0, 20) ]))
        elif settings.COINDAEMON_ALGO  == 'scrypt-jane':
                if settings.SCRYPTJANE_NAME == 'vtc_scrypt':
                     hash_bin = scryptjane.getPoWHash(''.join([ header_bin[i*4:i*4+4][::-1] for i in range(0, 20) ]))
                else:
                     hash_bin = scryptjane.getPoWHash(''.join([ header_bin[i*4:i*4+4][::-1] for i in range(0, 20) ]), int(ntime, 16))
        elif settings.COINDAEMON_ALGO == 'quark':
            hash_bin = quark_hash.getPoWHash(''.join([ header_bin[i*4:i*4+4][::-1] for i in range(0, 20) ]))
        elif settings.COINDAEMON_ALGO == 'skein_hash':
            hash_bin = skein_hash.getPoWHash(''.join([ header_bin[i*4:i*4+4][::-1] for i in range(0, 20) ]))
        elif settings.COINDAEMON_ALGO == 'groestl':
            hash_bin = groestl_hash.getPoWHash(''.join([ header_bin[i*4:i*4+4][::-1] for i in range(0, 20) ]))
        else:
            hash_bin = util.doublesha(''.join([ header_bin[i*4:i*4+4][::-1] for i in range(0, 20) ]))

        hash_int = util.uint256_from_str(hash_bin)
        scrypt_hash_hex = "%064x" % hash_int
        header_hex = binascii.hexlify(header_bin)
        if settings.COINDAEMON_ALGO == 'scrypt' or settings.COINDAEMON_ALGO == 'scrypt-jane':
            header_hex = header_hex+"000000800000000000000000000000000000000000000000000000000000000000000000000000000000000080020000"
        else: pass

        target_user = self.diff_to_target(difficulty)
        if hash_int > target_user:
            raise SubmitException("Share is above target")

        # Mostly for debugging purposes
        target_info = self.diff_to_target(100000)
        if hash_int <= target_info:
            log.info("Yay, share with diff above 100000")

        # Algebra tells us the diff_to_target is the same as hash_to_diff
        share_diff = int(self.diff_to_target(hash_int))

        # 5. Compare hash with target of the network
        if hash_int <= job.target:
            # Yay! It is block candidate!
            log.info("We found a block candidate! %s" % scrypt_hash_hex)

            # Reverse the header and get the potential block hash (for scrypt only)
            #if settings.COINDAEMON_ALGO == 'scrypt' or settings.COINDAEMON_ALGO == 'sha256d':
            #   if settings.COINDAEMON_Reward == 'POW':
            block_hash_bin = util.doublesha(''.join([ header_bin[i*4:i*4+4][::-1] for i in range(0, 20) ]))
            block_hash_hex = block_hash_bin[::-1].encode('hex_codec')
            #else:   block_hash_hex = hash_bin[::-1].encode('hex_codec')
            #else:  block_hash_hex = hash_bin[::-1].encode('hex_codec')
            # 6. Finalize and serialize block object
            job.finalize(merkle_root_int, extranonce1_bin, extranonce2_bin, int(ntime, 16), int(nonce, 16))

            if not job.is_valid():
                # Should not happen
                log.exception("FINAL JOB VALIDATION FAILED!(Try enabling/disabling tx messages)")

            # 7. Submit block to the network
            serialized = binascii.hexlify(job.serialize())
            on_submit = self.bitcoin_rpc.submitblock(serialized, block_hash_hex, scrypt_hash_hex)
            if on_submit:
                self.update_block()

            if settings.SOLUTION_BLOCK_HASH:
                return (header_hex, block_hash_hex, share_diff, on_submit)
            else:
                return (header_hex, scrypt_hash_hex, share_diff, on_submit)

    def submitblock(self, block_hex, hash_hex, scrypt_hex):
  #try 5 times? 500 Internal Server Error could mean random error or that TX messages setting is wrong
        attempts = 0
        while True:
            attempts += 1
            if self.has_submitblock == True:
                try:
                    log.debug("Submitting Block with submitblock: attempt #"+str(attempts))
                    log.debug([block_hex,])
                    resp = (yield self._call('submitblock', [block_hex,]))
                    log.debug("SUBMITBLOCK RESULT: %s", resp)
                    break
                except Exception as e:
                    if attempts > 4:
                        log.exception("submitblock failed. Problem Submitting block %s" % str(e))
                        log.exception("Try Enabling TX Messages in config.py!")
                        raise
                    else:
                        continue
            elif self.has_submitblock == False:
                try:
                    log.debug("Submitting Block with getblocktemplate submit: attempt #"+str(attempts))
                    log.debug([block_hex,])
                    resp = (yield self._call('getblocktemplate', [{'mode': 'submit', 'data': block_hex}]))
                    break
                except Exception as e:
                    if attempts > 4:
                        log.exception("getblocktemplate submit failed. Problem Submitting block %s" % str(e))
                        log.exception("Try Enabling TX Messages in config.py!")
                        raise
                    else:
                        continue
            else:  # self.has_submitblock = None; unable to detect submitblock, try both
                try:
                    log.debug("Submitting Block with submitblock")
                    log.debug([block_hex,])
                    resp = (yield self._call('submitblock', [block_hex,]))
                    break
                except Exception as e:
                    try:
                        log.exception("submitblock Failed, does the coind have submitblock?")
                        log.exception("Trying GetBlockTemplate")
                        resp = (yield self._call('getblocktemplate', [{'mode': 'submit', 'data': block_hex}]))
                        break
                    except Exception as e:
                        if attempts > 4:
                            log.exception("submitblock failed. Problem Submitting block %s" % str(e))
                            log.exception("Try Enabling TX Messages in config.py!")
                            raise
                        else:
                            continue

        if json.loads(resp)['result'] == None:
            # make sure the block was created.
            log.info("CHECKING FOR BLOCK AFTER SUBMITBLOCK")
            defer.returnValue((yield self.blockexists(hash_hex, scrypt_hex)))
        else:
            defer.returnValue(False)