def test_replace_chain_bad_chain(blockchain_three_blocks):
blockchain = Blockchain()
blockchain_three_blocks.chain[1].hash = 'evil_hash'
with pytest.raises(Exception, match= 'The incomming chain is invalid'):
blockchain.replace_chain(blockchain_three_blocks.chain)
from backend.routes.blueprints import WALLET, BLOCKCHAIN, TRANSACTION
from backend.config import PORT, ROOT_PORT
app = Flask(__name__)
@app.route('/')
def route_default():
return 'Welcome to the blockchain ;)'
app.register_blueprint(BLOCKCHAIN, url_prefix="/blockchain")
app.register_blueprint(TRANSACTION, url_prefix="/transactions")
app.register_blueprint(WALLET, url_prefix="/wallet")
CORS(app, resources={r'/*': {'origins': 'http://localhost:3001'}})
if os.environ.get('PEER') == 'True':
PORT = random.randint(5001, 6000)
result = requests.get(f'http://localhost:{ROOT_PORT}/blockchain')
result_blockchain = Blockchain.from_json(result.json())
try:
Blockchain.replace_chain(result_blockchain.chain)
print('\n -- Succesfully synchronized the local chain')
except Exception as e:
print(f'\n --Error synchronizing: {e}')
app.run(port=PORT)
def test_replace_chain(blockchain_three_blocks):
blockchain = Blockchain()
blockchain.replace_chain(blockchain_three_blocks.chain)
assert blockchain.chain == blockchain_three_blocks.chain