blockchain.py

"""
Created on Thu Apr  4 14:09:35 2019

@author: gaurava
"""
import threading
import time
from hashlib import sha256
from urllib.parse import urlparse
from json import loads
from copy import copy
import requests
from blspy import PrivateKey, PublicKey, Signature, AggregationInfo
from random import SystemRandom
from bls import BLS
from transaction import Transaction
from block import Block


class Blockchain(threading.Thread):
    def __init__(self, listen_port=None, root_logger=None):
        """
        :param listen_port:
        :param root_logger:
        """
        threading.Thread.__init__(self)
        self.Hash = ""
        self.address = "127.0.0.1:" + str(listen_port)

        self.current_transactions = dict()
        self.chain = dict()
        self.nodes = set()
        # Recently broadcast msg ids
        self.broadcast_list = []
        # Pre defined genesis block public key
        self.UTXO = dict()
        self.UTXO[
            "\u008d\u0006\u00efP^\u0091P^\u00ae\u00caW\u00b4\\\u00e5\u00ea1\u0084\r\u001au\u00c9\u00a5\u00ea2H;z\u0087\u00ed\u0016Hv\u00a7\u0000\u00c8^gkE\u0018\f\u0017\u0016\u00a2\u0007\u00fa\u0004\u00b0"] = 10000000
        self.sign_proposed_run_flag = True
        self.sign_commit_run_flag = True
        self.round_time = 30
        self.sign_proposed_block_delay = 8
        self.propose_block_check = 10
        self.sign_commit_block_delay = 2
        self.commit_delay = 5
        self.min_participants = 4
        self.leader_hash_check = '3'
        self.roundNumber = 0
        seed = []
        for i in range(0, 32):
            seed.append(SystemRandom().randrange(0, 254))
        seed = bytes(seed)
        self.private_key = PrivateKey.from_seed(seed)

        self.public_key = self.private_key.get_public_key()

        self.public_key_list = dict()
        self.public_key_list[self.address] = str(self.public_key.serialize(), "ISO-8859-1")
        self.proposed_block = None
        self.logger = root_logger
        self.logger.info("blockchain genesis block created")
        block = Block(0, "genesis", "", self.current_transactions, "", "", "420")
        self.Hash = block.get_hash()
        self.chain[self.Hash] = block.jsonify_block()

        print("genesis block hash ", self.Hash)
        # temp

        self.proposal_accepted = dict()
        self.proposal_queue = dict()
        self.commit_accepted = dict()
        self.commit_queue = dict()
        self.proposal_verified_list = dict()
        self.commit_verified_list = dict()
        self.lock = True

    def am_i_leader(self):

        qh = sha256(str(self.Hash).encode()).hexdigest()
        temp_array = []
        for c in qh:
            temp_array.append(ord(c))
        msg = bytes(temp_array)
        sig = self.private_key.sign(msg)
        qh = str(sig.serialize(), "ISO-8859-1")
        sig = sha256((qh + str(self.roundNumber)).encode()).hexdigest()

        temp_array.clear()
        for c in sig:
            temp_array.append(ord(c))
        msg = bytes(temp_array)
        sig = self.private_key.sign(msg)
        sig = str(sig.serialize(), "ISO-8859-1")
        sig_hash = sha256(sig.encode()).hexdigest()
        self.logger.info("----ami----")
        self.logger.info("am_i_leader " + self.address)
        self.logger.info("first_sign_hash " + sha256(qh.encode()).hexdigest())
        self.logger.info("second_sign_hash " + sig_hash)
        self.logger.info("****ami****")
        if sig_hash < self.leader_hash_check:
            print(sig_hash)
            return qh, sig, True
        return qh, sig, False

    def broadcast_thread(self, path, json_data):
        """
        :param path:
        :param json_data:
        :return:
        """
        neighbours = self.public_key_list.keys()
        for node in neighbours:
            if node == self.address:
                pass
            else:
                url = "http://" + node + path
                try:
                    response = requests.post(url, json=json_data)
                    self.logger.debug(url)
                    # if response.status_code > 210:
                    # print(str(response.status_code), response.json())
                    # self.logger.debug(str(response.status_code) + " " + response.json())
                except requests.exceptions.Timeout:
                    self.logger.error("time out error in request -> " + url)
                except requests.exceptions.TooManyRedirects:
                    self.logger.error("too many redirects error in request -> " + url)
                except requests.exceptions.RequestException as e:
                    self.logger.error("request exception error in request -> " + url)
                    self.logger.error(e)

    def broadcast_it(self, path, json_data):
        """
        :param path:
        :param json_data:
        :return:
        """
        self.logger.debug("broadcast started" + path)
        threading.Thread(target=self.broadcast_thread, args=(path, json_data)).start()

    def fetch_txn(self, txn_hash, address):
        """
        :param txn_hash:
        :param address:
        :return:
        """
        url = "http://" + address + "/fetch/txn"
        try:
            response = requests.post(url, json={"txn": txn_hash})
            self.logger.debug(url)
            if response.status_code == 200:
                return response.json()['txn']
            else:
                return None
        except requests.exceptions.Timeout:
            self.logger.error("time out error in request -> " + url)
        except requests.exceptions.TooManyRedirects:
            self.logger.error("too many redirects error in request -> " + url)
        except requests.exceptions.RequestException as e:
            self.logger.error("request exception error in request -> " + url)
            self.logger.error(e)
        return None

    def new_block(self, a, b):
        """
        :param a: signature by the validator on Qh
        :param b: signature by the validator on (hash of a + round_number)
        :return:
        """
        if len(self.current_transactions) == 0:
            return None
        hashed_txn, dummy_txn = Transaction.process_transaction(self)

        # removing all unwanted txn from stable txn list
        for txn_hash in dummy_txn:
            self.current_transactions.pop(txn_hash)

        if len(hashed_txn) == 0:
            return

        block = Block(len(self.chain) + 1, self.address, self.Hash, hashed_txn, "", "", time.time())

        sig = block.sign_block(self.private_key)
        self.proposal_accepted.clear()
        self.broadcast_list.append(block.get_hash())
        self.proposed_block = block
        json_data = {'block': block.jsonify_block(), 'sig': sig, 'int_a': a, 'int_b': b}
        self.logger.info("----new----")
        self.logger.info("am_i_leader " + self.address)
        self.logger.info("first_sign_hash " + sha256(a.encode()).hexdigest())
        self.logger.info("second_sign_hash " + sha256(b.encode()).hexdigest())
        self.logger.info("****new****")
        self.proposal_queue.clear()
        threading.Thread(target=self.sign_proposed_block, args={self.sign_proposed_block_delay}).start()
        self.broadcast_it("/proposed", json_data)
        self.proposal_queue[a] = block
        self.logger.info(
            str(self.propose_block_check) + "sleep time for  sign_proposed_block fxn" + str(time.time()))
        time.sleep(self.propose_block_check)

        share_of_vote = len(self.proposal_accepted) / len(self.public_key_list)
        print("proposed block vote of share ", share_of_vote)

        if share_of_vote > 0.66:
            temp_list = []
            for _sign in self.proposal_accepted.values():
                if type(_sign) != Signature:
                    _sign = bytes(_sign, "ISO-8859-1")
                    _sign = Signature.from_bytes(_sign)
                temp_list.append(_sign)

            agg_sig = Signature.aggregate(temp_list)
            json_data = {'block': block.get_hash(), 'n_list': list(self.proposal_accepted.keys()),
                         'co_sig': str(agg_sig.serialize(), "ISO-8859-1")}
            self.logger.debug("block can be committed")
            self.commit_queue.clear()
            threading.Thread(target=self.sign_commit_block, args={self.sign_commit_block_delay}).start()
            self.commit_queue[block.get_hash()] = block
            self.logger.debug(
                str(self.sign_commit_block_delay) + " sleep time for sign_commit_block fxn " + str(time.time()))
            self.broadcast_list.append(sha256(block.get_hash().encode()).hexdigest())
            self.broadcast_it("/commit", json_data)
            time.sleep(self.commit_delay)

            share_of_vote = len(self.commit_accepted) / len(self.public_key_list)
            print("commit block vote of share ", share_of_vote)

            if share_of_vote > 0.66:
                temp_list.clear()
                for _sign in self.commit_accepted.values():
                    temp_list.append(_sign)
                agg_sig = Signature.aggregate(temp_list)

                json_data = {'block': block.get_hash(),
                             'n_list': list(self.commit_accepted.keys()),
                             'co_sig': str(agg_sig.serialize(), "ISO-8859-1")
                             }
                block.signature = str(agg_sig.serialize(), "ISO-8859-1")
                block.signers = list(self.commit_accepted.keys())
                self.broadcast_it("/verified_commit", json_data)
                time.sleep(0.200)
                # self.commit_certificate = self.commit_accepted.copy()
                # self.committed_block = block

                self.update_blockchain(block)
                self.proposed_block = None
                return block
            return None
        return None

    def leader_child_thread(self):
        round_start_time = time.time()
        time.sleep(1)
        a, b, run_flag = self.am_i_leader()
        if run_flag:
            self.logger.info(self.address + " " + str(self.roundNumber) + " started its run fxn ")

            print("i'm leader now")
            do_mining = True

            while do_mining and (time.time() - round_start_time) < (self.round_time - self.commit_delay - 2):

                # Forge the new Block by adding it to the chain
                block = self.new_block(a, b)
                if block is None:
                    time.sleep(0.2)
                else:
                    self.logger.debug("block Mined")
                    do_mining = False
                    if self.round_time - (time.time() - round_start_time) > 0.01:
                        time.sleep(self.round_time - (time.time() - round_start_time))
            if self.round_time - (time.time() - round_start_time) > 0.01:
                time.sleep(self.round_time - (time.time() - round_start_time))
            self.logger.info(self.address + " " + str(self.roundNumber) + " ended its run fxn ")
            print("my leadership ended")

    def leader_process(self):
        while len(self.public_key_list) < self.min_participants:
            time.sleep(0.200)
        flag = True
        while flag:
            t = time.asctime(time.localtime(time.time()))
            t = t.split(':')[2]
            t = t.split(' ')[0]
            print(t)
            if t == "00":
                flag = False
            else:
                time.sleep(59.5 - int(t))

        while True:
            self.roundNumber += 1

            self.logger.info("----details----")
            self.logger.info("round number " + str(self.roundNumber))
            self.logger.info("self.Hash " + self.Hash)
            self.logger.info("time " + time.asctime(time.localtime(time.time())))
            self.logger.info("****details****")

            threading.Thread(target=self.leader_child_thread, args={}).start()
            time.sleep(self.round_time)

    def register_node(self, address):
        """
        Add a new node to the list of nodes
        :param address: Address of node. Eg. 'http://192.168.0.5:5000'
        """

        parsed_url = urlparse(address)
        if parsed_url.netloc or parsed_url.path:
            url = "http://" + address + "/ping"
            response = requests.post(url, json={"new_node": self.address,
                                                "pub_key": str(self.public_key.serialize(), "ISO-8859-1"),
                                                "pub_key_list": self.public_key_list, "round_number": self.roundNumber})
            if response:
                if response.status_code == 200:
                    self.nodes.add(address)
                    new_node_pub_key_list = response.json()['pub_key_list']
                    round_number = response.json()['round_number']
                    if self.roundNumber < round_number:
                        self.roundNumber = round_number
                    for pub_key_address in new_node_pub_key_list:
                        if pub_key_address not in self.public_key_list:
                            if pub_key_address != address:
                                self.register_node(pub_key_address)
                            self.public_key_list[pub_key_address] = new_node_pub_key_list[pub_key_address]
                    return True
                else:
                    return False
            else:
                return False
        else:
            return False

    def resolve_conflict(self, node_address):
        """
        :param node_address:
        :return:
        """
        if self.lock:
            self.lock = False
            # We're only looking for chains longer than ours
            max_length = len(self.chain)
            # Grab and verify the chains from all the nodes in our network
            try:
                response = requests.get(f'http://{node_address}/chain')
                response2 = requests.get(f'http://{node_address}/balance')
            except:
                self.lock = True
            if response.status_code == 200:
                remote_hash = response.json()['Hash']
                remote_chain = response.json()['chain']
                length = len(remote_chain)
                utxo = response2.json()['utxo']
                # Check if the length is longer and the chain is valid
                if length > max_length:
                    if self.valid_chain(remote_chain, remote_hash, self.Hash):
                        self.UTXO = utxo
                        self.chain = remote_chain
                        last_hash = self.Hash
                        self.Hash = remote_hash
                        self.update_transactions(last_hash)
                        self.lock = True
                        return 1
                    else:
                        self.lock = True
                        return -2
                elif length < max_length:
                    url = "http://" + node_address + "/check_conflict"
                    json_data = {'node_address': self.address}
                    try:
                        requests.post(url, json=json_data)
                        response = requests.post(url, json=json_data)
                        self.logger.info("----conflict response----")
                        self.logger.info(response.status_code)
                        self.logger.info(response.json())
                        self.logger.info("****conflict response****")
                    except:
                        pass
                    self.lock = True
                    return 0
            self.lock = True
            return -1
        self.lock = True
        return -1

    def sign_proposed_block(self, sleep_time):
        """
        :param sleep_time:
        :return:
        """
        if self.sign_proposed_run_flag:
            self.sign_proposed_run_flag = False

            self.logger.debug(str(sleep_time) + "time when sleep called in sign_proposed_block "
                              + str(time.time()))
            if sleep_time > 0:
                time.sleep(sleep_time)
            priority_block = None
            # print("proposal queue length ", len(self.proposal_queue))
            for block in sorted(self.proposal_queue.keys()):
                priority_block = self.proposal_queue.get(block)
                break
            self.logger.info("priority block " + str(priority_block))
            if priority_block is not None:
                url = "http://" + priority_block.harvester + "/reply_proposal"
                self.proposal_verified_list[priority_block.get_hash()] = priority_block
                try:
                    sig = priority_block.sign_block(self.private_key)
                    response = requests.post(url, json={"p_signed": sig, "address": self.address})
                    self.logger.info("block signed and sent on " + url)
                    # self.logger.debug(str(response.status_code) + " " + response.json())
                    print("block signed and sent on " + url)
                except requests.exceptions.Timeout:
                    self.logger.error("time out error in request -> " + url)
                except requests.exceptions.TooManyRedirects:
                    self.logger.error("too many redirects error in request -> " + url)
                except requests.exceptions.RequestException as e:
                    self.logger.error("request exception error in request -> " + url)
                    self.logger.error(e)
            else:
                self.logger.error("proposed priority block none")
            self.sign_proposed_run_flag = True

    def sign_commit_block(self, sleep_time):
        """
        :param sleep_time:
        :return:
        """
        if self.sign_commit_run_flag:
            self.sign_commit_run_flag = False

            self.logger.debug(str(sleep_time) + "time when sleep called in sign_commit_block " +
                              str(time.time()))
            if sleep_time > 0:
                time.sleep(sleep_time)
            priority_block = None

            print("commit queue ", len(self.commit_queue))
            for block in sorted(self.commit_queue):
                priority_block = self.commit_queue.get(block)
                break
            self.logger.info("priority block " + str(priority_block))
            if priority_block is not None:
                url = "http://" + priority_block.harvester + "/reply_commit"
                try:
                    message = priority_block.get_hash()
                    self.commit_verified_list[message] = priority_block
                    temp_array = []
                    for c in message:
                        temp_array.append(ord(c))
                    msg = bytes(temp_array)

                    sig = self.private_key.sign(msg)
                    response = requests.post(url, json={"tc_signed": str(sig.serialize(), "ISO-8859-1"),
                                                        "address": self.address})
                    self.logger.debug(str(response.status_code) + " " + response.json())
                    self.logger.info("block signed and sent on " + url)
                    print("block signed and sent on " + url)
                except requests.exceptions.Timeout:
                    self.logger.error("time out error in request -> " + url)
                except requests.exceptions.TooManyRedirects:
                    self.logger.error("too many redirects error in request -> " + url)
                except requests.exceptions.RequestException as e:
                    self.logger.error("request exception error in request -> " + url)
                    self.logger.error(e)
            else:
                self.logger.error("commit priority block none")
            self.sign_commit_run_flag = True

    def true_leader(self, a, b, node_address):
        """
        :param a:
        :param b:
        :param node_address:
        :return:
        """
        sig_hash = sha256(b.encode()).hexdigest()
        self.logger.info("----true_leader----")
        self.logger.info("true_leader " + node_address)
        self.logger.info("first_sign_hash " + sha256(a.encode()).hexdigest())
        self.logger.info("second_sign_hash " + sig_hash)
        self.logger.info("****true_leader****")
        if sig_hash > self.leader_hash_check:
            print(sig_hash)
            print("hash limit crossed not a potential leader")
            return False
        qh = sha256(str(self.Hash).encode()).hexdigest()
        temp_array = []
        for c in qh:
            temp_array.append(ord(c))
        msg = bytes(temp_array)
        signature = BLS.deserialize(a, Signature)
        node_address = copy(self.public_key_list[node_address])
        public_key = BLS.deserialize(node_address, PublicKey)
        signature.set_aggregation_info(AggregationInfo.from_msg(public_key, msg))
        if signature.verify():
            sig = sha256((a + str(self.roundNumber)).encode()).hexdigest()
            temp_array.clear()
            for c in sig:
                temp_array.append(ord(c))
            msg = bytes(temp_array)

            signature = BLS.deserialize(b, Signature)
            signature.set_aggregation_info(AggregationInfo.from_msg(public_key, msg))
            flag = signature.verify()
            print("second signature verifiaction ", flag)
            return flag
        else:
            print("first signature couldn't verified")
            return False

    def update_blockchain(self, block):
        """
        :param block:
        :return:
        """
        block.update_block(self)
        self.Hash = block.get_hash()
        self.chain[self.Hash] = block.jsonify_block()
        self.proposal_queue.clear()
        self.commit_queue.clear()
        self.proposal_accepted.clear()
        self.commit_accepted.clear()
        print("blockchain updated new head >>> ", self.Hash)
        self.logger.info("blockchain updated new head -> : " + self.Hash)

    def update_transactions(self, last_hash):
        local_iterative_hash = self.Hash
        while local_iterative_hash != last_hash:
            block = Block.create_block(self.chain[local_iterative_hash])
            txns = block.txn
            for each in txns.keys():
                if each in self.current_transactions:
                    self.current_transactions.pop(each)
            local_iterative_hash = block.previous_hash
        pass

    def valid_chain(self, chain, block_hash, verifier_hash):

        if block_hash != verifier_hash:
            block = chain[block_hash]
            block = Block.create_block(block)
            if not block.verify_offline_block_signature(self):
                print("verify block issue")
                return False

            return self.valid_chain(chain, block.previous_hash, verifier_hash)
        return True

    # @staticmethod
    # def temp_valid_chain(chain, block_hash, last_hash):
    #
    #     if block_hash != last_hash:
    #         block = chain[block_hash]
    #         block = Block.create_block(block)
    #         if not block.temp(public_key_lists):
    #             print("verify block issue")
    #             return False
    #
    #         return Blockchain.temp_valid_chain(chain, block.previous_hash, last_hash)
    #     return True


# print("------------")
# seed = bytes([0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
#                   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#                   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
# from_sk = PrivateKey.from_seed(seed)
# from_pk = from_sk.get_public_key()
#
# seed = bytes([1]) + seed[1:]
# to_sk = PrivateKey.from_seed(seed)
# to_pk = to_sk.get_public_key()
#
# blockchain = Blockchain(listen_port=5000)
# tx_list = dict()
# tx = Transaction(BLS.serialize(from_pk), BLS.serialize(to_pk), 12, from_sk)
# tx_list[tx.get_hash()] = tx.jsonify_Transaction()
#
# tx2 = Transaction(BLS.serialize(from_pk), BLS.serialize(to_pk), 122, from_sk)
# tx_list[tx.get_hash()] = tx.jsonify_Transaction()
#
# _block = Block(12, blockchain.address, "hash", list(tx_list.keys()), "", "", 123.123)
# sig = _block.sign_block(blockchain.private_key)
# sig1 = _block.sign_block(to_sk)
# # aggsig = Signature.aggregate([BLS.deserialize(sig, Signature), BLS.deserialize(sig1, Signature)])
#
# _block.signature = sig
# _block.signers = []
# _block.signers.append(blockchain.address)
# print(_block.verify_block_signature(blockchain))
#
#
# public_key_lists = ({
#         "127.0.0.1:5000": "\u0094ñÁç\u0085\u0012¾fþB\u0010Î\u008c\u0001\u0015Qu¿2ë\u008cÐÂÒ\u0095Þ\u008b\u001eÛØÞÓß\t&.'ETF\u009djß×ið3µ",
#         "127.0.0.1:5001": "\u0089\u0099pg ³b,\u008bÏ÷5w¬Ë¿Õz\u001f© .Mܺ¨\\q\u000fÝùx\u0015ü*$â\u0013èÙ6!2\\F\nÖ\u0018",
#         "127.0.0.1:5002": "\u0082ìã\u0006g·¸ºu¦\u000eHðÃg\u00178ºd\u0098@D½hm\u001c\u0015âÑ\u0092ÂêÜÎ7ÅÃSÏѺ9A³xOÔ\u008a",
#         "127.0.0.1:5003": "\u0097ò\u0019\u0018\u008e|+Ø)wc=\u000eg\u0005¤»£\u009fñøkóÙ\u0012g__¬\u0005¿*\u0091\u0014\u001e\u000fF>\u001dWÍ>\u0005\u0007\u0084®NÙ"
#     })
# for each in public_key_lists.keys():
#     public_key_lists[each] = BLS.deserialize(public_key_lists[each], PublicKey)
#
# print(type(public_key_lists))
# local_chain = {
#         "00b739f43e0176b25532e0b58f45e7fca7cd0566ca53f2b1d605c75aead4b9eb": "{\"index\": 3, \"harvester\": \"127.0.0.1:5001\", \"previous_hash\": \"cd005d6daf0ada838d5169ce810f2e4e6ecaa39b4d46ec0d1f4072f385f26d8a\", \"txn\": {\"c0a822d94844ba16f248acb9c24b5d8d292421fcf5b1b798d27550d48918d1ea\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\u0017\\\\u00cb\\\\b\\\\u001b\\\\u00ce=U\\\\u00f5~\\\\u001b\\\\u00e1\\\\u0094\\\\u00c5\\\\b\\\\u00f9W+\\\\u00d5\\\\u00f5\\\\u00d9\\\\u00aeg\\\\u00a4\\\\u0081\\\\u0006\\\\u000b\\\\u00f9]\\\\b\\\\u00a5\\\\u00e8\\\\u008a\\\\\\\\\\\\u0080|\\\\b\\\\u00d0\\\\u0010\\\\u00ff\\\\u008c\\\\u00d0\\\\u00bb\\\\u00bc\\\\u00c8\\\\u00be\\\\u00a5\\\\u000b\\\\u00e8\\\", \\\"amount\\\": 65, \\\"signature\\\": \\\"\\\\t\\\\u0099\\\\u00de\\\\u00f10\\\\u00f8\\\\u00c7*Y\\\\u001a\\\\u00a1\\\\u0006\\\\u0091\\\\u00b0\\\\u0094\\\\u00a2.\\\\u00f3y\\\\\\\"L\\\\u00e1\\\\u00c8(\\\\u00cd\\\\u00bbiR>\\\\u00e4W\\\\u00f3\\\\u00a0zz \\\\u00d9\\\\u009c\\\\u00ab\\\\u00f8\\\\u00ea\\\\u00ea.g\\\\u00dc\\\\u009f\\\\u009b\\\\u00b9\\\\u0006S\\\\u00853UQ\\\\u00bc\\\\u000fp,\\\\u00f6G>>\\\\u00d3jM!\\\\u00d5\\\\u00c4\\\\u008e\\\\u00fd\\\\u001b\\\\u00ab\\\\u00897\\\\u00cfcpg_\\\\u00e4g\\\\u0091\\\\u00c6C}\\\\u00b2}\\\\u001d\\\\u00ba\\\\u00e7\\\\u00ad* \\\\u0092\\\\u00fcQ\\\", \\\"timestamp\\\": 1562912721.6483772}\", \"e2139da7bbb5ff1963a5012cf748caa035d34b83706d05bf094d06711f4f50ff\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\nET\\\\u00ae\\\\u00eb~\\\\u0095\\\\u0005g`\\\\u00d8,\\\\u0094/\\\\u00ceY(\\\\u00c6\\\\u00ba\\\\u00da\\\\\\\\(\\\\u009bO\\\\u00a6}\\\\u00e4f\\\\u000b\\\\u0006e\\\\u00d1\\\\u00a4@[u\\\\u00f7\\\\u009b\\\\u00aa\\\\u00dd\\\\\\\"M\\\\u00b291\\\\u009c0F\\\", \\\"amount\\\": 71, \\\"signature\\\": \\\"\\\\f\\\\u009f\\\\u00ab\\\\u007f\\\\u00f0\\\\u00a1/\\\\u009b\\\\u0081v\\\\u0019i\\\\u00d1\\\\u0087\\\\u0090\\\\u00d6@\\\\u009aR\\\\u0080\\\\u0092\\\\u00d2\\\\u00a4\\\\u00e1\\\\u00ae\\\\u0094\\\\u00a4y1{i\\\\u009c\\\\u00f2\\\\u00cbq<HE\\\\u00d3IpC\\\\u00b1\\\\u00c5\\\\u00d8\\\\u00aa\\\\u00a5\\\\u0096\\\\ro\\\\u00908\\\\u00dc\\\\u00cf\\\\u008c?\\\\u00ef\\\\u00ed\\\\u000ba\\\\u001f\\\\u00a3{2\\\\u0097\\\\u00a8\\\\u0000\\\\u00bcY\\\\u00b4\\\\u00a8\\\\u00eco\\\\u00ff\\\\u0013a\\\\u00af\\\\u00cf\\\\u00a9\\\\u0098f\\\\u001c\\\\u00b1\\\\\\\"\\\\u00eb\\\\u00c7\\\\u00e9b\\\\u00fc?\\\\u0016\\\\u00be\\\\u00fc\\\\u00b1*\\\\u009d\\\", \\\"timestamp\\\": 1562912728.7052476}\", \"e405e23828c73efe7aee54407d849da8dd3d84a186bcfa2e24733ac7c83796a8\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\u008d\\\\u00d6\\\\u0091\\\\u00125\\\\u00cd\\\\u009a:\\\\u0088\\\\u00d1\\\\u00a7J\\\\r\\\\u00ab/4k\\\\u00be\\\\u00c9\\\\u0092\\\\u00bbm\\\\u00bd\\\\u00af\\\\u0010\\\\u00d4\\\\u00c0k\\\\u008a=e\\\\u00e2\\\\bn\\\\bb\\\\u009ce\\\\u00be\\\\u0085\\\\u00fa\\\\u0090[\\\\u001e\\\\u00a4A5\\\\u00d6\\\", \\\"amount\\\": 49, \\\"signature\\\": \\\"\\\\u0019yxSs\\\\u0019\\\\u00e4\\\\u0085\\\\u00ab\\\\u00c7\\\\u0085\\\\u001d\\\\u00d9\\\\u0099!\\\\u0010\\\\u0092\\\\u0017\\\\u00f4\\\\\\\"\\\\u00b85\\\\u00eb\\\\u00d7\\\\u00fa\\\\u00be\\\\u0095&\\\\u00a0\\\\u0000m)\\\\u00ea\\\\u00ffR\\\\u00e3=M*\\\\r\\\\b\\\\u00d3\\\\u00b0T\\\\u00a0\\\\u00b2t\\\\u00e0\\\\u0011A\\\\u0095\\\\u00cc\\\\u00d7\\\\u008a\\\\u00d7\\\\u0084\\\\u001f\\\\u00b7\\\\u0005|\\\\u0084\\\\u0015\\\\u00e0\\\\u00e6,JD\\\\u00b1\\\\u00ed\\\\u001b\\\\u00c8z\\\\u00a0\\\\u009f\\\\u00ed\\\\u00b8\\\\u0080\\\\u00e5\\\\u00f3\\\\u008ax\\\\u00aa',\\\\u0098VE+=\\\\u00aa\\\\u0005\\\\u00b4\\\\u00f4\\\\u0012\\\\u0018\\\\u00e5\\\", \\\"timestamp\\\": 1562912714.5846517}\", \"ebd3189589d575800cd9deba9751031603b6e0acdc30c719bb53045ce85acb0c\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\u0006\\\\u00db\\\\u00e6\\\\u00b6\\\\u007f(\\\\u00c4\\\\u00bd\\\\u00faY\\\\u0002\\\\u00c4 Y\\\\u00b0M\\\\u00ac\\\\u0001\\\\u00a0\\\\u00d2\\\\u008160\\\\u0014\\\\u000b_\\\\u00cc\\\\u008f|U\\\\n\\\\u0088/\\\\u00bb\\\\u001a\\\\u0093\\\\u0082\\\\u009f\\\\u00b5\\\\tU\\\\u0095\\\\n0\\\\u00d8E\\\\u00eb\\\\u00b2\\\", \\\"amount\\\": 100, \\\"signature\\\": \\\"\\\\u0014\\\\u00ae\\\\u00e5\\\\u00e6\\\\b.\\\\u0006`\\\\u0083C\\\\u009ap\\\\u008d\\\\u00df\\\\u0090QQ\\\\u00f9\\\\u00d4\\\\u00ae6\\\\u009d\\\\u00a4\\\\u0084<\\\\u009b\\\\u00f7\\\\u00e93\\\\u00f5\\\\u00ca\\\\u00bd\\\\u0016\\\\u00e5v^\\\\u00c6K(Md(\\\\u001b\\\\u00f3\\\\u009a\\\\f\\\\u00c0;\\\\u0013\\\\u00dc\\\\u00d7x\\\\u0002\\\\u0017\\\\u00bb\\\\u0002\\\\u000f\\\\u00ca\\\\u00c6\\\\u00d8\\\\u00f9\\\\u0092\\\\u00f7`\\\\u00be\\\\u0001\\\\u0004\\\\u00bb(\\\\u00f6\\\\u00f8\\\\u00d7c\\\\u00fd\\\\u00ed\\\\u008a\\\\u0092\\\\u0081\\\\u00176\\\\u00c4*\\\\u00d1\\\\u00c3<TH\\\\u00b1\\\\u00b5\\\\u0081\\\\u0011\\\\u0092\\\\u00d1\\\\u00de\\\\u00c6C\\\", \\\"timestamp\\\": 1562912707.5153232}\"}, \"signature\": \"\\u0099O\\u000f\\u00d8\\u0091R\\u00a7\\u008b\\u0014\\u0092\\u0091\\u0081\\u00ce\\u00d11\\u00ec\\\\\\u00aaUU\\u00ce\\u00a5\\u00b8\\u0089\\u0005#\\u00c5\\u00ba\\u0003\\u00d9h\\u00e33\\u00beW\\u009faj\\u00dd\\u00da\\u0006\\u008c9\\u00daBs\\u0007(\\u0017\\u000f\\u00e5s\\u000e\\u00a4\\u009d\\u00e2\\u00c3\\u0085\\u0019\\u00a4f\\u009bR\\u0081?/U\\u00ea\\u00ea\\u00cb\\f\\u00f6\\u00c4Ms\\u00f4\\u00e8%\\u0018\\u00bd\\u00c1R:\\u00b5\\u0080\\u0014\\u00d1N4!\\\\\\u00b8\\u00cf\\u00dc\\u00103\", \"signers\": [\"127.0.0.1:5001\", \"127.0.0.1:5000\", \"127.0.0.1:5003\", \"127.0.0.1:5002\"], \"timestamp\": 1562912731.465246}",
#         "048483f6ad53154f32040ebb6b52e0045c6db7542d4473ed46e3c09b5644ace3": "{\"index\": 6, \"harvester\": \"127.0.0.1:5003\", \"previous_hash\": \"49e4a39fab87fc117446db4fc8182ab62d2dbdc1e51399d0f889b42e6bcfee4b\", \"txn\": {\"4b8448aeab569f5496bf2a89c193e26482b6a9e7fa52dc9957274ee62affcfd7\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\u0002T\\\\u00d4L\\\\u0006\\\\u00f8\\\\u00c1WZL\\\\u007f>\\\\u0089\\\\u00ce<\\\\u00d9k\\\\u00f9\\\\u009f\\\\u001du\\\\u0007\\\\u0002\\\\u0014\\\\u00b3y\\\\u00ac\\\\u00b8\\\\u00b6m\\\\u00e7e\\\\u00a6\\\\u00c3[\\\\u00c0\\\\u00aeD\\\\u00fb\\\\u007f\\\\u00ae \\\\u00a9\\\\u00a5Z}\\\\u00be\\\\u00ca\\\", \\\"amount\\\": 84, \\\"signature\\\": \\\"\\\\u008d\\\\u00b5\\\\u0013\\\\\\\"`\\\\u0016\\\\u001a\\\\u00d9\\\\u00f0\\\\u00ce\\\\u00d7_1C\\\\u00b3\\\\u008a\\\\u0084\\\\u00c4\\\\u00c4\\\\u00a6\\\\u00a8It\\\\u0085#\\\\u00bax\\\\\\\"\\\\u00c1\\\\u00ea\\\\u00f6\\\\u00e8\\\\u00c2-?\\\\u00d5V\\\\u00ff\\\\u009a;\\\\u0088\\\\u0014\\\\u00bc\\\\u00b64\\\\u009a\\\\u0011`\\\\u0012\\\\u00fc\\\\u009a]\\\\u00a4#}`\\\\u00ef\\\\u0091\\\\u000f\\\\u00b7M\\\\u00d4\\\\u00f4:\\\\u0017|L4\\\\u00abX\\\\u00d7\\\\u00e1\\\\u00f6\\\\u00d8\\\\u008e\\\\u00e9jh\\\\u00ffNwU\\\\u0080w\\\\u008e\\\\u00a9\\\\u00ee!)7\\\\u00f1\\\\bL\\\\u00d0\\\\u00fd\\\\u00dd\\\", \\\"timestamp\\\": 1562912799.3957624}\", \"667289186451aefa72451c5932a3b29aee9d759c476876f83c2f35e08879a222\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\u0089\\\\u00f4<J\\\\u009a\\\\u00ea\\\\u00dflq\\\\u00fd\\\\u00ce,\\\\u00ad\\\\u0097\\\\u00c4\\\\u00ab\\\\u00e6\\\\u00ec\\\\u00c5\\\\u00c6\\\\u00c6\\\\u00e8\\\\u00b3\\\\u00f0\\\\u00fd\\\\u00d3<\\\\u0081\\\\u00f7\\\\u00f2mL\\\\u00cb>nn\\\\t.\\\\n \\\\u00abT\\\\u0095\\\\u00a0\\\\u00e3\\\\u009bB\\\\u00e8\\\", \\\"amount\\\": 25, \\\"signature\\\": \\\"\\\\u0012\\\\u00b00\\\\u00b3\\\\u00ef%\\\\u00ab\\\\u00e5\\\\u00ee\\\\u0016\\\\u00f2\\\\u00ec|\\\\u00cb\\\\u008a\\\\u00f0\\\\u00b8\\\\u00bdgn\\\\u00df.p\\\\u00bf5\\\\u009fc\\\\\\\"\\\\u00ea\\\\u00d3C\\\\u00b5\\\\u008b\\\\u00cb5J\\\\u0010\\\\u00ee\\\\u0015\\\\u00d6r6\\\\u00c4\\\\u00f4\\\\u00da\\\\u00f3\\\\u001e\\\\u00d3\\\\u000b&#k\\\\u001b-\\\\u00db\\\\u00d2H\\\\u0013\\\\u00821UL\\\\u00d1.\\\\u00caV8\\\\u0007Hjq\\\\u0018\\\\u0013A\\\\u0003\\\\u0019\\\\u008c:%\\\\u00fe\\\\u00ffD09\\\\u0083*E\\\\u0004\\\\u00b8\\\\u009a`\\\\u00ac/\\\\u008b\\\\u00c6}\\\", \\\"timestamp\\\": 1562912813.5191011}\", \"812b0be9b4da175ed79dcdaf366c52cf5c754f6e7ae82c9a4af5df1a6ebc2e2f\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\u0007]\\\\u009c\\\\u0088\\\\u008c\\\\u008c\\\\u000f\\\\u0081\\\\u0016\\\\u0014@\\\\u00c2)\\\\u00c5\\\\u001ar/2\\\\u0003\\\\u0098\\\\u00b6\\\\u00f2?#\\\\u0001\\\\u00f3AN \\\\u00ebA\\\\u009a*5\\\\u00dfX5#\\\\u00da\\\\u00ad\\\\u00ebZ\\\\u00bd\\\\u00f8\\\\u00d4\\\\u00f9\\\\u009d\\\\u0092\\\", \\\"amount\\\": 37, \\\"signature\\\": \\\"\\\\u000b<\\\\u0091\\\\u00d8\\\\u00ec\\\\u00e6\\\\u008dIRT\\\\u00e4D\\\\u00b4\\\\u00c3\\\\u00d8C\\\\u0018\\\\\\\"\\\\u008c\\\\u0094?\\\\u00de0!\\\\u00ebQ\\\\u00be\\\\u00e9\\\\u00e3\\\\u00f8\\\\u0010\\\\u00a0\\\\u00e1+\\\\u00f8\\\\u0082\\\\u008a#\\\\u00e7\\\\u00e1\\\\u0098~\\\\u00a2n\\\\u00d70\\\\u00c4D\\\\t\\\\u00fct%\\\\u0096\\\\u00d8\\\\u00be\\\\u00c2\\\\u00c5\\\\u00f5B\\\\u001fx\\\\u00c2\\\\u0003n\\\\u000f\\\\u00c3\\\\u0098e\\\\fI8\\\\u00bf\\\\u0019\\\\f\\\\u00ff\\\\u00b8}2\\\\u00d4:\\\\u00c7\\\\u00be\\\\u0093Y\\\\u00d4T\\\\u00c8\\\\u00bc\\\\u0098\\\\u0081\\\\u00cdhQ\\\\u008a\\\\u001aa\\\", \\\"timestamp\\\": 1562912792.2828205}\", \"842112cf117d89c0ab2768d9b209538235b9c19a51daeeb16c7459e84ee2e598\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\r\\\\u00b9T\\\\u0005\\\\u0002[\\\\u00b8\\\\u0093kJ&\\\\u008c\\\\u0016>\\\\u00a2\\\\u009a`PUY\\\\u00a8d:\\\\u00d8\\\\u0014\\\\u00f6\\\\u00a6\\\\u00e4\\\\u00ed`1\\\\u0004\\\\r\\\\\\\".\\\\u00b0\\\\u00dd\\\\u00fb\\\\u00ea\\\\u00d1?era\\\\u001a\\\\u0019rw\\\", \\\"amount\\\": 1, \\\"signature\\\": \\\"\\\\u000b\\\\u00bf\\\\u00cd\\\\u00e1BvRE\\\\u00d6\\\\u0018x\\\\u00be\\\\u00a7\\\\u0001\\\\r\\\\\\\\\\\\u0001\\\\u007f^\\\\u00d8qh\\\\u00f5\\\\u00e3_L(0\\\\u00a7k\\\\u00beoR\\\\u0010+\\\\u0087V\\\\\\\\F\\\\u00808\\\\u00da\\\\u009e\\\\u00cc\\\\u00d8\\\\u00c7\\\\u009a\\\\u009a\\\\u0006>\\\\u00a6\\\\u009f\\\\u00fd\\\\u00ac\\\\u00d8<\\\\u0000gl\\\\u0080@\\\\u0012\\\\u009a\\\\u000b\\\\u0092of\\\\u001d\\\\u00fc\\\\u00dd\\\\u00c2\\\\u00be/}\\\\u00f2\\\\u00c7g:b\\\\u00fd7\\\\u009c^\\\\u0096n\\\\u007fRE\\\\u00064)\\\\u00ed^\\\\u00a5\\\\u009dU\\\", \\\"timestamp\\\": 1562912806.4561982}\", \"8d62e5ca338badac3cd1c95055fe7a3ef306463106d6b34b058038c98b10b4fe\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\u0088\\\\u000e\\\\u00a4\\\\u00af%\\\\u007f=\\\\u00c1\\\\u0080\\\\u00fc-U\\\\u00e3\\\\u00cfy\\\\u00a9]/\\\\u0080(U\\\\u001b\\\\u00ec\\\\u00f8:\\\\u00ed\\\\u00b1\\\\u00b7\\\\u00dd}\\\\u00f0h\\\\u0092\\\\u0086\\\\u008f\\\\u001b\\\\u00ab\\\\u00ea\\\\u00e5^\\\\u00f1\\\\u00f8zsx\\\\u00ad\\\\u00dao\\\", \\\"amount\\\": 38, \\\"signature\\\": \\\"\\\\u008e\\\\u00bd\\\\u0094\\\\u0095[0L\\\\u0010\\\\u00a4\\\\u00dc%~X8?\\\\u00b6E\\\\u00ec\\\\u00d7\\\\u00a1\\\\u00ecX_\\\\u0007\\\\u00eaH\\\\u00ef\\\\u001a\\\\u00fc\\\\u0082\\\\u00c2V\\\\u00afIH\\\\u00aeM\\\\u0092\\\\u00a0\\\\u00f7\\\\u00c7\\\\u00aa\\\\u009fw\\\\u0098-\\\\u00f3\\\\u0096\\\\b\\\\u000b\\\\u00b4\\\\u009a\\\\u00a0\\\\u0011\\\\u0013\\\\u00b8\\\\u00e1\\\\u00f6\\\\u008d\\\\u00c1L\\\\u00fcgqr\\\\u00c1\\\\u00e7l\\\\u00dc\\\\u00f2\\\\fR3\\\\u00c3\\\\u001a<|\\\\u008d\\\\u00ff\\\\u00a1\\\\u00bbYW\\\\u008d>\\\\u008bz\\\\u00d2\\\\u00a5\\\\u00d2\\\\u009b\\\\u00a4\\\\u00c7<\\\\u00d4\\\\u00f5\\\", \\\"timestamp\\\": 1562912820.5824833}\"}, 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#         "106bed6da36d9330465c16d337ff65cdef0720174d427d6ac3378c463a36e528": "{\"index\": 9, \"harvester\": \"127.0.0.1:5002\", \"previous_hash\": \"a8bbe33c50587cbb0d6d370d79877fb4c8762b42f773b5e4b0892047b852d1ed\", \"txn\": {\"5ab4462cffc1a94798773b7d696eafd45e8cbce1239f783974000b0efafd0a5d\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\u0089\\\\u0015\\\\u00c2>x4\\\\u00ee\\\\u0084\\\\u008a+\\\\u00ea\\\\u001d\\\\u00d9-\\\\fl\\\\u00b6\\\\u0017Ht\\\\u00e4\\\\u00fa6\\\\u00d0@_/\\\\u0012\\\\u0081P\\\\u00df\\\\u00ec\\\\u00d3\\\\u008b\\\\u0099\\\\u00f2\\\\u00d3\\\\u00da\\\\u00e2\\\\u00bf\\\\u00d2\\\\u0094\\\\f\\\\u00b7A\\\\u00df\\\\u00de\\\\u0083\\\", \\\"amount\\\": 54, \\\"signature\\\": \\\"\\\\u00907\\\\u00e3\\\\u00ebEA\\\\u00a0\\\\u00b6N#v\\\\u001a\\\\u0096\\\\u00b0S\\\\u00f5$L;\\\\u0092'/\\\\u00c5\\\\u00f0t\\\\u00c9\\\\u00e7}\\\\u00b2\\\\u0017\\\\u00b7\\\\u00f8\\\\u00f0\\\\f\\\\u0081\\\\u0001\\\\u000e\\\\u00f8\\\\ns\\\\u00ee\\\\u00fdy\\\\u0092C\\\\u00f7\\\\u0005^\\\\u0005c\\\\u00e4\\\\u00de\\\\u008e\\\\u001c\\\\u0002.\\\\u00d9\\\\u00fc\\\\u00e4\\\\u00d1\\\\u00ed\\\\u00e0\\\\u0093l\\\\u00a6O\\\\u008e!\\\\u0018\\\\u00fdNE\\\\u00a7*\\\\u00e3M\\\\u00c7\\\\u00ba\\\\u00b6/N\\\\u00c31\\\\u0012\\\\u00b8\\\\u001c\\\\u0015\\\\u00c72[fw\\\\u00a2j\\\\u00cel\\\", \\\"timestamp\\\": 1562912975.9964616}\"}, \"signature\": \"\\u0011\\u00faa:\\u00fb\\u0014`\\u00c0JR\\u0090\\u0018k\\f1d\\u00eafg\\u0019\\u00f9I\\u0085U\\u0082\\u0011\\u0085_-\\u001c\\u0081g,f\\u00f8H\\u00b0:\\u009b\\\\r\\u00f211h\\u00e59\\u00af\\u0016Qjz\\u0002\\u001f\\ta\\u00a8\\u0088NQ=\\u0011\\u00a4\\u0012y\\u00f5%\\u00f7\\u0090\\u00f9\\u00b9\\u001aQZ)\\u00f3#\\u0098\\u001dA\\u00caW\\u0087\\u00ab\\u00ad\\u008d\\u00e74\\u00a3\\u00cf\\u0017\\u00d9\\u00b5MI\\u00c3\", \"signers\": [\"127.0.0.1:5002\", \"127.0.0.1:5003\", \"127.0.0.1:5001\"], \"timestamp\": 1562913001.774561}",
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\\\"\\\\u008a\\\\u0088X\\\\u0010[7Px\\\\u0083\\\\u00b5\\\\u00ca\\\\u00f4\\\\u008eh\\\\nm\\\\u0017\\\\u00a5\\\\u009e\\\\u0019,`S?&\\\\u00d8.I\\\\u00f3\\\\u001c\\\\u00e5\\\\u00b4\\\\u00bc\\\\u007f\\\\u008aof,\\\\u00e5\\\\u00ab\\\\u00b7\\\\u00b5\\\\u0099z\\\\u00f2\\\\u00e6\\\\u00ac\\\\u009b\\\", \\\"amount\\\": 74, \\\"signature\\\": \\\"\\\\u0085:\\\\u00b2\\\\u0016\\\\u009a\\\\u0015G\\\\u00c4\\\\u00a8p\\\\\\\"\\\\u00ef}\\\\u00c0c\\\\u0090\\\\u0091t\\\\u0083\\\\u00f6\\\\u00bc\\\\u0006\\\\u0004\\\\u00c5\\\\u0083\\\\u00ac\\\\u00b4\\\\u00a7\\\\u00ebP\\\\u0088\\\\u00be\\\\u0013\\\\u0002E\\\\u0000ll7\\\\n\\\\u007f\\\\u00eaA0\\\\fq\\\\u0089\\\\u0001\\\\u0012\\\\u00bf\\\\u00a9\\\\u00e1\\\\u00fa8\\\\u00b0+\\\\u00eb\\\\u0017\\\\u0011{\\\\u00de\\\\u00a3\\\\u0017\\\\u00fe\\\\u00c1\\\\u0012\\\\u001d\\\\u0080\\\\u00e3<\\\\u00f5\\\\u0098+\\\\b\\\\u00fe\\\\u00f7\\\\u00f9\\\\u00c25\\\\u0091j\\\\u00c9A}\\\\\\\\\\\\u00f0\\\\u00f6\\\\u00b7\\\\u00cfxe\\\\u00d5\\\\u00f1\\\\u00bf\\\\u0087:\\\", \\\"timestamp\\\": 1562912827.6441016}\", \"bd469ee27aa065fe196136515ad85fedd43e39f1287b6d59bea4ba9b42c3ecba\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\u0013\\\\u001b\\\\u00d0\\\\t\\\\u00dc\\\\u00ba\\\\r\\\\u00c2\\\\u00ea\\\\u00cak\\\\u0015\\\\u00fa1X\\\\u00eb\\\\u00d3\\\\u001e+\\\\u0015\\\\u00e3r~Tny\\\\u0092S\\\\u00b1%\\\\u0083\\\\u008a\\\\u00a2\\\\u0000F\\\\u00d6B\\\\u00d2\\\\u00b0F}u\\\\u0018\\\\u001c\\\\u00e0\\\\u00b3\\\\u009a!\\\", \\\"amount\\\": 42, \\\"signature\\\": \\\"\\\\u0007\\\\u0095\\\\u0095\\\\u0081\\\\u00c3\\\\u008c\\\\u00fa\\\\u0004\\\\u0007\\\\u00ab/\\\\u00ef\\\\u00a5\\\\u00fbxn\\\\u00cc\\\\u00c9\\\\u00dd\\\\u00f3A\\\\u000e\\\\u00ee\\\\u00ca\\\\u0007\\\\u009fx\\\\u0015\\\\u001f\\\\u0088\\\\u00b7\\\\u00d0\\\\u009d#*!*E;\\\\u008f\\\\u00f9*\\\\u0095\\\\u0017\\\\u00da\\\\u000fBk\\\\u0011\\\\u00b4\\\\u001b\\\\u0015\\\\u0018\\\\u0090\\\\u007fP$~)\\\\u00e6\\\\u00e0:\\\\u00da\\\\u00f0Eq:\\\\u00905\\\\u0013\\\\u00ca\\\\u009b\\\\u00e2P\\\\u00fe\\\\u000e\\\\u009e]\\\\u00d9w\\\\u00cf9\\\\u00dc3\\\\u00df\\\\u00f1\\\\u00c3\\\\u00e75\\\\u0082B\\\\u0089doi\\\\u00a6\\\", \\\"timestamp\\\": 1562912884.1591954}\", \"dc2b43c6504e60969fbcdc74d12c35ceab37d6fda7137b1bdb607a8b142a3d9b\": \"{\\\"from\\\": \\\"\\\\u008d\\\\u0006\\\\u00efP^\\\\u0091P^\\\\u00ae\\\\u00caW\\\\u00b4\\\\\\\\\\\\u00e5\\\\u00ea1\\\\u0084\\\\r\\\\u001au\\\\u00c9\\\\u00a5\\\\u00ea2H;z\\\\u0087\\\\u00ed\\\\u0016Hv\\\\u00a7\\\\u0000\\\\u00c8^gkE\\\\u0018\\\\f\\\\u0017\\\\u0016\\\\u00a2\\\\u0007\\\\u00fa\\\\u0004\\\\u00b0\\\", \\\"to\\\": \\\"\\\\u0095\\\\u008f(NZ\\\\u009d\\\\u0090 \\\\bVK\\\\u00f1\\\\u00a3g\\\\u00c1\\\\u00d4\\\\u00d0\\\\u00b0-\\\\u0004\\\\u00b3\\\\fu\\\\u00df!\\\\u00df\\\\u00ee>>\\\\u00a4y^\\\\u0097\\\\u00e9{ku\\\\u00bf\\\\u0011\\\\u008e\\\\u008aG\\\\u00da\\\\u00eb\\\\b\\\\u00ea\\\\u001f\\\\u00c3\\\", \\\"amount\\\": 59, \\\"signature\\\": \\\"\\\\u0098t\\\\u00e0M\\\\u0087\\\\u00bbG\\\\u00c7K\\\\u00e4z\\\\u00945A\\\\u001e\\\\u00b5\\\\u00b91w\\\\u00fcdR\\\\u00ff\\\\u00b5\\\\u00a8\\\\u00d8\\\\u00c6\\\\u008fw\\\\u001aR\\\\u00a6\\\\u00d7V\\\\u0082W\\\\u0011\\\\u0017\\\\u00bfo\\\\u009f\\\\u00ea\\\\u00cd\\\\u0010\\\\u001f\\\\u00f3S\\\\u0015\\\\u0001{V=\\\\u007f\\\\u000f\\\\u0015a\\\\u00a3\\\\u0014\\\\u0099\\\\u0088U\\\\u0096,2\\\\u00bc\\\\u00c4\\\\u0096\\\\u0005:]\\\\u000bE\\\\u00d4\\\\u008e\\\\u008d\\\\u00b5\\\\u00c1\\\\u00f4\\\\u001b\\\\u0095/\\\\u00eeNd)\\\\u00d5\\\\u0094\\\\u00d6\\\\u00ad\\\\u00ea\\\\n\\\\u009a\\\\u00cen\\\\u00f6\\\\u0014\\\", \\\"timestamp\\\": 1562912891.2256215}\"}, \"signature\": \"\\u0082M\\u00f7\\u00c1*\\u0006\\u0098\\u00ba\\u000e\\u00d7\\u0014\\u0091'sP+\\u0016d%m4Y\\u00c9T^\\u0007)\\u0084}\\u00ac\\u00c2\\u00861;:US.\\u00fb\\u00b3kb9\\u00ffDz\\u0013\\u0013\\u0016\\u00acQ\\u00ec\\u00e3$D\\u0081q>\\u009a\\u00ef*\\u001ec\\u00c5p\\\\\\u0086Go\\u00d1\\u00e7\\u0092Z\\u00f3\\u00a4\\u00fc\\u001b\\u0013eX\\u00dd\\u0005fd\\u00ed\\u00db\\u00b7\\u0097.\\u00c1\\u00ec1\\u00dd\\u00fb\\u00ef\\u00fc\", \"signers\": [\"127.0.0.1:5003\", \"127.0.0.1:5002\", \"127.0.0.1:5001\"], \"timestamp\": 1562912911.551474}"
#     }
# last_hash = "106bed6da36d9330465c16d337ff65cdef0720174d427d6ac3378c463a36e528"
#
# print(Blockchain.temp_valid_chain(local_chain, last_hash, "84644a0b467e20fb060c60a2a8c657d8f55821109b5838a4ed1d3522ee546295"))