def test_blockchain_valid_transaction_duplicate_rewardss():
blockchain = Blockchain()
transaction = Transactions(Wallet(), 'recipient', 100).to_json()
reward_transaction = Transactions.transaction_reward(Wallet()).to_json()
blockchain.add_block([transaction, reward_transaction, reward_transaction])
with pytest.raises(Exception, match="has multiple rewards"):
Blockchain.is_chain_transaction_valid(blockchain.chain)
def test_blockchain_valid_transaction_incorrect_historical_balance(blockchain):
wallet = Wallet()
bad_transaction = Transactions(wallet, 'recipient', 1)
bad_transaction.output[wallet.address] = 9000
bad_transaction.input['amount'] = 9001
bad_transaction.input['signature'] = wallet.sign(bad_transaction.output)
blockchain.add_block([bad_transaction.to_json()])
with pytest.raises(Exception, match="did not have the correct balance"):
Blockchain.is_chain_transaction_valid(blockchain.chain)
def test_blockchain_valid_transaction_duplicate_transactions():
blockchain = Blockchain()
transaction = Transactions(Wallet(), 'recipient', 100).to_json()
blockchain.add_block([transaction, transaction])
with pytest.raises(Exception, match="is not unique"):
Blockchain.is_chain_transaction_valid(blockchain.chain)
def test_blockchain_valid_transaction(blockchain):
Blockchain.is_chain_transaction_valid(blockchain.chain)
