def check_tx(self, req):
# Decode Tx
decoded_tx = self.__decode_incoming_tx(req.check_tx.tx)
# Get the account for the sender
# We use unconfirmed cache to allow multiple Tx per block
if not decoded_tx.sender:
return Result.error(code=InternalError,
log="No Sender - is the Tx signed?")
acct = self._storage.unconfirmed.get_account(decoded_tx.sender)
if not acct:
return Result.error(code=InternalError, log="Account not found")
# Check the nonce
if acct.nonce != decoded_tx.nonce:
return Result.error(code=InternalError, log="Bad nonce")
# increment the account nonce
self._storage.unconfirmed.increment_nonce(decoded_tx.sender)
# verify the signature
if not Key.verify(acct.pubkey, decoded_tx.signature):
return Result.error(code=InternalError, log="Invalid Signature")
# Check if this is a value transfer, if so make sure sender has an
# acct balance > tx.value
if decoded_tx.value > 0 and acct.balance < decoded_tx.value:
return Result.error(code=InternalError,
log="Insufficient balance for transfer")
return Result.ok()
def deliver_tx(self, req):
tx = self.__decode_incoming_tx(req.deliver_tx.tx)
if not tx.call in self._tx_handlers:
return Result.error(code=InternalError,
log="No matching Tx handler")
if not self._tx_handlers[tx.call](tx, self._storage.confirmed):
return Result.error(code=InternalError,
log="Tx Handler returned false or None")
return Result.ok()
def deliver_tx(self, tx):
""" Mutate state if valid Tx """
if not self.__valid_input(tx):
return Result.error(log='bad count')
self.txCount += 1
return Result.ok()
def check_tx(self, raw_tx):
"""Validate the Tx before entry into the mempool"""
try: # Check txn syntax
tx = utils.Transaction(raw_tx)
except Exception:
return Result.error(log='txn syntax invalid')
# Check "sender" account has enough coins
if int(self.db.get_address_info(tx.sender)['balance']) < tx.amount:
return Result.error(log='insufficient funds')
if tx.signature_invalid: # Check txn signature
return Result.error(log='signature invalid')
if tx.timestamp_invalid: # Check timestamp for a big delay
return Result.error(log='lag time is more than 2 hours')
# Hooray!
return Result.ok()
def deliver_tx(self, raw_tx):
""" Mutate state if valid Tx """
try: # Handle unvalid txn
tx = utils.Transaction(raw_tx)
except Exception:
return Result.error(log='txn syntax invalid')
self.new_block_txs.append(tx)
self.db.update_state(tx=tx)
return Result.ok()
def check_tx(self, raw_transaction):
"""Validate the transaction before entry into
the mempool.
Args:
raw_tx: a raw string (in bytes) transaction."""
logger.debug('check_tx: %s', raw_transaction)
transaction = decode_transaction(raw_transaction)
if self.bigchaindb.validate_transaction(transaction):
logger.debug('check_tx: VALID')
return Result.ok()
else:
logger.debug('check_tx: INVALID')
return Result.error()
def deliver_tx(self, raw_transaction):
"""Validate the transaction before mutating the state.
Args:
raw_tx: a raw string (in bytes) transaction."""
logger.debug('deliver_tx: %s', raw_transaction)
transaction = self.bigchaindb.validate_transaction(
decode_transaction(raw_transaction), self.block_transactions)
if not transaction:
logger.debug('deliver_tx: INVALID')
return Result.error(log='Invalid transaction')
else:
logger.debug('storing tx')
# self.bigchaindb.store_transaction(transaction)
self.block_txn_ids.append(transaction.id)
self.block_transactions.append(transaction)
return Result.ok()
def check_tx(self, tx):
""" Validate the Tx before entry into the mempool """
if not self.__valid_input(tx):
return Result.error(log='bad count')
return Result.ok(log='thumbs up')