def test_transaction_chain_when_invalid_balance_provenance(clone_blockchain):
wallet = Wallet()
malformed_tx_instance = Transaction(Wallet(), "b13b2bf4", 1)
malformed_tx_instance.output[wallet.address] = 9000
malformed_tx_instance.input["amount"] = 9001
malformed_tx_instance.input["signature"] = wallet.gen_signature(
malformed_tx_instance.output)
clone_blockchain.add_block([malformed_tx_instance.serialize_to_json()])
with pytest.raises(Exception, match="contains an invalid input amount"):
Blockchain.is_tx_chain_valid(clone_blockchain.chain)
def test_verify_signature_with_valid_signature():
data = {"foo": "bar"}
wallet = Wallet()
sig = wallet.gen_signature(data)
assert Wallet.verify_signature(wallet.public_key, data, sig)
