def test_block_dupe_tx(self, b, alice):
from bigchaindb.models import Block, Transaction
from bigchaindb.common.exceptions import DuplicateTransaction
tx = Transaction.create([alice.public_key], [([alice.public_key], 1)])
block = Block([tx, tx], alice.public_key)
block.sign(alice.private_key)
b.store_block(block.to_dict())
with raises(DuplicateTransaction):
block.validate(b)
def test_sign_block(self, b, alice):
from bigchaindb.common.crypto import PrivateKey, PublicKey
from bigchaindb.common.utils import gen_timestamp, serialize
from bigchaindb.models import Block, Transaction
transactions = [
Transaction.create([alice.public_key], [([alice.public_key], 1)])
]
timestamp = gen_timestamp()
voters = ['Qaaa', 'Qbbb']
expected_block = {
'timestamp': timestamp,
'transactions': [tx.to_dict() for tx in transactions],
'node_pubkey': alice.public_key,
'voters': voters,
}
expected_block_serialized = serialize(expected_block).encode()
expected = PrivateKey(
alice.private_key).sign(expected_block_serialized)
block = Block(transactions, alice.public_key, timestamp, voters)
block = block.sign(alice.private_key)
assert block.signature == expected.decode()
public_key = PublicKey(alice.public_key)
assert public_key.verify(expected_block_serialized, block.signature)
def create_block(self, validated_transactions):
"""Creates a block given a list of `validated_transactions`.
Note that this method does not validate the transactions. Transactions
should be validated before calling create_block.
Args:
validated_transactions (list(Transaction)): list of validated
transactions.
Returns:
Block: created block.
"""
# Prevent the creation of empty blocks
if len(validated_transactions) == 0:
raise exceptions.OperationError('Empty block creation is not '
'allowed')
voters = self.nodes_except_me + [self.me]
block = Block(validated_transactions, self.me, gen_timestamp(), voters)
block = block.sign(self.me_private)
return block
def create_block(self, validated_transactions):
"""Creates a block given a list of `validated_transactions`.
Note that this method does not validate the transactions. Transactions
should be validated before calling create_block.
Args:
validated_transactions (list(Transaction)): list of validated
transactions.
Returns:
Block: created block.
"""
# Prevent the creation of empty blocks
if len(validated_transactions) == 0:
raise exceptions.OperationError('Empty block creation is not '
'allowed')
voters = self.nodes_except_me + [self.me]
block = Block(validated_transactions, self.me, gen_timestamp(), voters)
block = block.sign(self.me_private)
return block
