def test_transaction_update():
sender_wallet = Wallet()
first_recipient = 'first_recipient'
first_amount = 50
transaction = Transaction(sender_wallet, first_recipient, first_amount)
next_recipient = 'next_recipient'
next_amount = 75
transaction.update(sender_wallet, next_recipient, next_amount)
assert transaction.output[next_recipient] == next_amount
assert transaction.output[sender_wallet.address] ==\
sender_wallet.balance - first_amount - next_amount
assert Wallet.verify(transaction.input['public_key'], transaction.output,
transaction.input['signature'])
to_first_again_amount = 25
transaction.update(sender_wallet, first_recipient, to_first_again_amount)
assert transaction.output[first_recipient] == \
first_amount + to_first_again_amount
assert transaction.output[sender_wallet.address] ==\
sender_wallet.balance - first_amount - next_amount - to_first_again_amount
assert Wallet.verify(transaction.input['public_key'], transaction.output,
transaction.input['signature'])
def is_valid_transaction(transaction):
if transaction.input == MINING_REWARD_INPUT:
if list(transaction.output.values()) != [MINING_REWARD]:
raise Exception('Invalid mining reward')
return
output_total = sum(transaction.output.values())
if transaction.input['amount'] != output_total:
raise Exception('Invalid transaction output values')
if not Wallet.verify(transaction.input['public_key'],
transaction.output,
transaction.input['signature']):
raise Exception('Invalid signature')
def is_valid_transaction(transaction):
"""
Validate a transaction. Raises and exception for invalid transactions.
"""
if transaction.input == MINING_REWARD_INPUT:
if list(transaction.output.values()) != [MINING_REWARD]:
raise Exception("Invalid mining reward.")
return
output_sum = sum(transaction.output.values())
if transaction.input["amount"] != output_sum:
raise Exception(
"The transaction is invalid because of the output values.")
if not Wallet.verify(transaction.input["public_key"],
transaction.output,
transaction.input["signature"]):
raise Exception("Invalid Signature.")
def is_valid_transaction(transaction):
"""
Validate a transaction. Use to validate mining reward as well.
Raise an exception for invalid transactions.
"""
if transaction.input == MINING_REWARD_INPUT:
if list(transaction.output.values()) != [MINING_REWARD]:
raise Exception("Invalid mining reward")
return
output_total = sum(transaction.output.values())
if transaction.input["amount"] != output_total:
raise Exception("Invalid transaction output values")
if not Wallet.verify(
transaction.input["public_key"],
transaction.output,
transaction.input["signature"]
):
raise Exception("Invalid signature")
def is_valid_transaction(transaction):
"""
Validate a transaction
:param transaction:
:return:
"""
if transaction.input == MINING_REWARD_INPUT:
if list(transaction.output.values()) != [MINING_REWARD]:
raise Exception('Invalid mining reward')
# Mining reward is not signed to we need to return right away
return
output_total = sum(transaction.output.values())
if transaction.input.get('amount') != output_total:
raise Exception('Invalid Transaction output values')
if not Wallet.verify(
transaction.input.get('public_key'),
transaction.output,
transaction.input.get('signature')
):
raise Exception('Invalid Signature')