def testIsValidTransactionChainBadTransaction(Blockchain3Blocks):
badTransaction = Trasaction(Wallet(), 'recipient', 1)
badTransaction.input['signature'] = Wallet().sign(badTransaction.output)
Blockchain3Blocks.addBlock([badTransaction.to_json()])
with pytest.raises(Exception):
Blockchain.isValidTransactionChain(Blockchain3Blocks)
def testisValidTransactionChainDuplicate(Blockchain3Blocks):
transaction = Trasaction(Wallet(), 'recipient', 1).to_json()
Blockchain3Blocks.addBlock([transaction, transaction])
with pytest.raises(Exception, match='is not unique'):
Blockchain.isValidTransactionChain(Blockchain3Blocks.chain)
def testIsValidTransactionChainMultiRewards(Blockchain3Blocks):
rewardOne = Trasaction.rewardTransaction(Wallet()).to_json()
rewardTwo = Trasaction.rewardTransaction(Wallet()).to_json()
Blockchain3Blocks.addBlock([rewardOne, rewardTwo])
with pytest.raises(Exception, match='one mining reward per block'):
Blockchain.isValidTransactionChain(Blockchain3Blocks.chain)
def testIsValidTransactionChainBadHistoricBalance(Blockchain3Blocks):
wallet = Wallet()
badTransaction = Trasaction(wallet, 'recipient', 1)
badTransaction.output[wallet.address] = 9000
badTransaction.input['amount'] = 9001
badTransaction.input['signature'] = wallet.sign(badTransaction.output)
Blockchain3Blocks.addBlock([badTransaction.to_json()])
with pytest.raises(Exception, match='has an invalid input amount'):
Blockchain.isValidTransactionChain(Blockchain3Blocks.chain)
def testClear():
transactionPool = TransactionPool()
transaction1 = Trasaction(Wallet(), 'recipient', 1)
transaction2 = Trasaction(Wallet(), 'recipient', 2)
transactionPool.setTransaction(transaction1)
transactionPool.setTransaction(transaction2)
blockchain = Blockchain()
blockchain.addBlock([transaction1.to_json(), transaction2.to_json()])
assert transaction1.id in transactionPool.transcationMap
assert transaction2.id in transactionPool.transcationMap
transactionPool.clearTransaction(blockchain)
assert not transaction1.id in transactionPool.transcationMap
assert not transaction2.id in transactionPool.transcationMap
def testCalculateBalance():
blockchain = Blockchain()
wallet = Wallet()
assert Wallet.calculateBalance(blockchain,
wallet.address) == STARTING_BALANCE
amount = 50
transaction = Trasaction(wallet, 'recipient', amount)
blockchain.addBlock(transaction.to_json())
assert Wallet.calculateBalance(blockchain,
wallet.address) == STARTING_BALANCE - amount
recoveryAmount1 = 25
recoveryTransaction1 = Trasaction(Wallet(), wallet.address,
recoveryAmount1)
recoveryAmount2 = 43
recoveryTransaction2 = Trasaction(Wallet(), wallet.address,
recoveryAmount2)
blockchain.addBlock(
[recoveryTransaction1.to_json(),
recoveryTransaction2.to_json()])
assert Wallet.calculateBalance(blockchain, wallet.address) == \
STARTING_BALANCE - amount + recoveryAmount1 + recoveryAmount2
def testValidTransactionChain(Blockchain3Blocks):
Blockchain.isValidTransactionChain(Blockchain3Blocks.chain)
def TestBlockchain():
blockchain = Blockchain()
assert blockchain.chain[0].hash == GENESIS_DATA['hash']
def testReplaceChainBadChain(Blockchain3Blocks):
blockchain = Blockchain()
Blockchain3Blocks.chain[1].hash = 'evil_hash'
with pytest.raises(Exception, match='The incoming chain is invalid'):
blockchain.replaceChain(Blockchain3Blocks.chain)
def testReplaceChain(Blockchain3Blocks):
blockchain = Blockchain()
blockchain.replaceChain(Blockchain3Blocks.chain)
assert blockchain.chain == Blockchain3Blocks.chain
def testIsValidChainBadGenesis(Blockchain3Blocks):
Blockchain3Blocks.chain[0].hash = 'evil_hash'
with pytest.raises(Exception, match='The genesis block must be valid'):
Blockchain.isValidChain(Blockchain3Blocks.chain)
def testIsValidChain(Blockchain3Blocks):
Blockchain.isValidChain(Blockchain3Blocks.chain)
def Blockchain3Blocks():
blockchain = Blockchain()
for i in range(3):
blockchain.addBlock([Trasaction(Wallet(), 'recipient', i).to_json()])
return blockchain
def testAddBlock():
blockchain = Blockchain()
data = 'test-data'
blockchain.addBlock(data)
assert blockchain.chain[-1].data == data
import os
import random
import requests
from flask import Flask, jsonify, request
from BackendSide.Blockchain.Blockchain import Blockchain
from BackendSide.Wallet.Transaction import Trasaction
from BackendSide.Wallet.wallet import Wallet
from BackendSide.Wallet.TransactionPool import TransactionPool
from BackendSide.PubNubSub import PubSub
app = Flask(__name__)
blockchain = Blockchain()
wallet = Wallet(blockchain)
transactionPool = TransactionPool()
pubsub = PubSub(blockchain, transactionPool)
@app.route('/')
def Default():
return 'Welcome to blockchain'
@app.route('/blockchain')
def routeBlockchain():
return jsonify(blockchain.to_json())
@app.route('/wallet/transaction', methods=['POST'])
def routeWalletTransacation():
# {'recipient': 'foo', 'amount': 15}
def testReplaceChainNotLonger(Blockchain3Blocks):
blockchain = Blockchain()
with pytest.raises(Exception, match='The incoming chain must be longer'):
Blockchain3Blocks.replaceChain(blockchain.chain)
import time
from BackendSide.Blockchain.Blockchain import Blockchain
from BackendSide.config import SEC
blockchain = Blockchain()
times = []
for i in range(1000):
startTime = time.time_ns()
blockchain.addBlock(i)
endTime = time.time_ns()
# Czas kopania
timeMine = endTime - startTime / SEC
# Pojedyńczy element dla czasu kopania
times.append(timeMine)
averageTime = sum(times) / len(times)
print(f'New block difficulty:{blockchain.chain[-1].dificulty}')
print(f'Time mine to new block:{timeMine}s')
print(f'Average Time to add a new block:{averageTime}s\n')