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 testVerifyValidSing():
data = {'foo': 'testData'}
wallet = Wallet()
signature = wallet.sign(data)
assert Wallet.verify(wallet.public_key, data, signature)