def test_contains_valid_transactions_duplicate_transaction(self):
transaction = Transaction(Wallet(), "recipient", 1).serialize()
self.blockchain.add_block([transaction, transaction])
with self.assertRaises(ContainsInvalidTransactionError):
Blockchain.contains_valid_transactions(self.blockchain.chain)
def test_contains_valid_transactions_duplicate_rewards(self):
self.blockchain.add_block([
Transaction.reward(Wallet()).serialize(),
Transaction.reward(Wallet()).serialize(),
])
# Block contains multiple reward transactions so we expect an exception
with self.assertRaises(ContainsInvalidTransactionError):
Blockchain.contains_valid_transactions(self.blockchain.chain)
def test_contains_valid_transactions_bad_transaction(self):
bad_transaction = Transaction(Wallet(), "recipient", 1)
# Use same transaction output but signed by wrong wallet
bad_transaction.input["signature"] = Wallet().sign(
bad_transaction.output)
self.blockchain.add_block([bad_transaction.serialize()])
with self.assertRaises(TransactionSignatureError):
Blockchain.contains_valid_transactions(self.blockchain.chain)
def test_contains_valid_transactions_bad_historic_balance(self):
wallet = Wallet()
bad_transaction = Transaction(wallet, "recipient", 1)
# Tamper with transaction, giving wallet a high amount
bad_transaction.output[wallet.address] = 1000
# Ensure input amount and transaction amount are still correct so validation doesn't fail at that point
bad_transaction.input["amount"] = 1001
# Re-sign
wallet.sign(bad_transaction.output)
self.blockchain.add_block([bad_transaction.serialize()])
with self.assertRaises(ContainsInvalidTransactionError):
Blockchain.contains_valid_transactions(self.blockchain.chain)
def test_contains_valid_transactions(self):
Blockchain.contains_valid_transactions(self.blockchain.chain)