def test_is_valid_transaction_chain():
blockchain = Blockchain()
blockchain_three_blocks = Blockchain()
for i in range(3):
blockchain_three_blocks.add_block([Transaction(Wallet(), 'recipient', i).to_json()])
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_is_valid_transaction_chain_bad_transaction(blockchain_three_blocks):
bad_transaction = Transaction(Wallet(), 'recipient', 1)
bad_transaction.input['signature'] = Wallet().sign(bad_transaction.output)
blockchain_three_blocks.add_block([bad_transaction.to_json()])
with pytest.raises(Exception):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_is_valid_transaction_chain_duplicate_transactions(
blockchain_three_blocks):
transaction = Transaction(Wallet(), 'recipient', 1).to_json()
blockchain_three_blocks.add_block([transaction, transaction])
with pytest.raises(Exception, match="is not unique"):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_is_valid_transaction_chain_multiple_rewards(blockchain_three_blocks):
reward_1 = Transaction.reward_transaction(Wallet()).to_json()
reward_2 = Transaction.reward_transaction(Wallet()).to_json()
blockchain_three_blocks.add_block([reward_1, reward_2])
with pytest.raises(Exception, match='one mining reward per block'):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_invalid_transaction_chain_malformed_transaction(blockchain_init):
bad_transaction = Transaction(Wallet(), "recipient", 1)
bad_transaction.input["signature"] = Wallet().sign(bad_transaction.output)
blockchain_init.add_block([bad_transaction.to_json()])
with pytest.raises(Exception):
Blockchain.is_valid_transaction_chain(blockchain_init.chain)
def test_invalid_transaction_chain_multiple_mining_rewards(blockchain_init):
reward_1 = Transaction.reward_transaction(Wallet()).to_json()
reward_2 = Transaction.reward_transaction(Wallet()).to_json()
blockchain_init.add_block([reward_1, reward_2])
with pytest.raises(Exception,
match="There can only be one mining reward per block."):
Blockchain.is_valid_transaction_chain(blockchain_init.chain)
def test_is_valid_transaction_chain_bad_balance_history(populated_blockchain):
wallet = Wallet()
bad_transaction = Transaction(wallet, 'recipient', 1)
bad_transaction.output[wallet.address] = 9000
bad_transaction.input['amount'] = 9001
bad_transaction.input['signature'] = wallet.sign(bad_transaction.output)
populated_blockchain.add_block([bad_transaction.to_json()])
with pytest.raises(Exception, match='invalid input amount'):
Blockchain.is_valid_transaction_chain(populated_blockchain.chain)
def test_is_valid_transaction_chain_duplicate_transactions():
blockchain_three_blocks = Blockchain()
for i in range(3):
blockchain_three_blocks.add_block([Transaction(Wallet(), 'recipient', i).to_json()])
transaction = Transaction(Wallet(), 'recipient', 10).to_json()
blockchain_three_blocks.add_block([transaction, transaction, transaction])
with pytest.raises(Exception, match='is not unique'):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_is_valid_transaction_chain_multiple_rewards():
blockchain_three_blocks = Blockchain()
for i in range(3):
blockchain_three_blocks.add_block([Transaction(Wallet(), 'recipient', i).to_json()])
reward1 = Transaction.reward_transaction(Wallet()).to_json()
reward2 = Transaction.reward_transaction(Wallet()).to_json()
blockchain_three_blocks.add_block([reward1, reward2])
with pytest.raises(Exception, match='one minig reward per block'):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_is_valid_transaction_bad_historic_balance(blockchain_three_blocks):
wallet = Wallet()
bad_transaction = Transaction(Wallet(), 'recipient', 1)
bad_transaction.output[wallet.address] = 9000
bad_transaction.input['amount'] = 9001
bad_transaction.input['signature'] = wallet.sign(bad_transaction.output)
blockchain_three_blocks.add_block([bad_transaction.to_json()])
with pytest.raises(Exception):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_is_valid_transaction_chain_bad_history_balance(
blockchain_three_blocks):
wallet = Wallet()
bad_transaction = Transaction(wallet, 'deadly_recipient', 1)
bad_transaction.output[wallet.address] = 9999
bad_transaction.input['amount'] = 10000
bad_transaction.input['signature'] = wallet.sign(bad_transaction.output)
blockchain_three_blocks.add_block([bad_transaction.to_json()])
with pytest.raises(Exception, match='has invalid input amount'):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_is_valid_transaction_chain_bad_historic_balance(blockchain_three_blocks):
wallet = Wallet()
bad_transaction = Transaction(wallet, 'recipient', 1)
# don't understand the point of this line of code. the point of the test is to ensure bad data isn't entered into the input['amount'] field which would result in the sender wallet's balance getting inflated. altering the output[wallet.address] field only serves to change the signature result, as far as i can tell. the test even passes when commenting out this line of code.
bad_transaction.output[wallet.address] = 9000
bad_transaction.input['amount'] = 9001
bad_transaction.input['signature'] = wallet.sign(bad_transaction.output)
blockchain_three_blocks.add_block([bad_transaction.to_json()])
with pytest.raises(Exception, match='has invalid input amount'):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_is_valid_transaction_chain_bad_history_balance(
blockchain_three_blocks):
wallet = Wallet()
bad_transaction = Transaction(wallet, "recipient", 1)
bad_transaction.output[wallet.address] = 9000
bad_transaction.input["amount"] = 9001
bad_transaction.input["signature"] = wallet.sign(bad_transaction.output)
blockchain_three_blocks.add_block([bad_transaction.to_json()])
with pytest.raises(Exception, match="has an invalid input amount"):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_is_valid_transaction_chain_bad_historic_balance():
blockchain_three_blocks = Blockchain()
for i in range(3):
blockchain_three_blocks.add_block([Transaction(Wallet(), 'recipient', i).to_json()])
wallet = Wallet()
bad_transaction = Transaction(wallet, 'recipient', 5)
bad_transaction.output[wallet.address] = 10000
bad_transaction.input['amount'] = 10005
bad_transaction.input['signature'] = wallet.sign(bad_transaction.output)
blockchain_three_blocks.add_block([bad_transaction.to_json()])
with pytest.raises(Exception, match="has an invalid input amount"):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_invalid_transaction_chain_bad_historic_balance(blockchain_init):
wallet = Wallet()
bad_transaction = Transaction(wallet, "recipient", 1)
bad_transaction.output[wallet.address] = 9999
bad_transaction.input["amount"] = 10000
bad_transaction.input["signature"] = wallet.sign(bad_transaction.output)
blockchain_init.add_block([bad_transaction.to_json()])
with pytest.raises(Exception, match="invalid input amount."):
Blockchain.is_valid_transaction_chain(blockchain_init.chain)
def test_invalid_transaction_chain_duplicate_transactions(blockchain_init):
transaction = Transaction(Wallet(), "recipient", 1).to_json()
blockchain_init.add_block([transaction, transaction])
with pytest.raises(Exception, match="is not unique."):
Blockchain.is_valid_transaction_chain(blockchain_init.chain)
def test_valid_transaction_chain(blockchain_three_blocks):
Blockchain.is_valid_transaction_chain(blockchain_three_blocks.chain)
def test_valid_transaction_chain(blockchain_init):
Blockchain.is_valid_transaction_chain(blockchain_init.chain)
def test_valid_transaction_chain_duplicate_transactions(populated_blockchain):
transaction = Transaction(Wallet(), 'recipient', 1).to_json()
populated_blockchain.add_block([transaction, transaction])
with pytest.raises(Exception, match='is not unique!'):
Blockchain.is_valid_transaction_chain(populated_blockchain.chain)
def test_valid_transaction_chain(populated_blockchain):
Blockchain.is_valid_transaction_chain(populated_blockchain.chain)
