def sign_transaction(self, prepared_tx):
with FinalizableSigner(self.secret_manager) as signer:
signed_tx = signer.sign_transaction(prepared_tx)
# log the actual byte count
tx_byte_count = tx_utils.get_byte_count(signed_tx)
logging.info('The actual transaction size is %d bytes', tx_byte_count)
signed_hextx = signed_tx.as_hex()
logging.info('Signed hextx=%s', signed_hextx)
return signed_tx
def sign_transaction(self, prepared_tx):
with FinalizableSigner(self.secret_manager) as signer:
signed_tx = signer.sign_transaction(prepared_tx)
# log the actual byte count
tx_byte_count = tx_utils.get_byte_count(signed_tx)
logging.info('The actual transaction size is %d bytes', tx_byte_count)
signed_hextx = signed_tx.as_hex()
logging.info('Signed hextx=%s', signed_hextx)
return signed_tx
def issue_on_blockchain(self):
"""
Issue the certificates on the Bitcoin blockchain
:param revocation_address:
:return:
"""
self.tree.make_tree()
op_return_value_bytes = unhexlify(self.tree.get_merkle_root())
op_return_value = hexlify(op_return_value_bytes)
spendables = self.connector.get_unspent_outputs(self.issuing_address)
if not spendables:
error_message = 'No money to spend at address {}'.format(self.issuing_address)
logging.error(error_message)
raise InsufficientFundsError(error_message)
last_input = spendables[-1]
tx = self.transaction_handler.create_transaction(last_input, op_return_value_bytes)
hex_tx = hexlify(tx.serialize())
logging.info('Unsigned hextx=%s', hex_tx)
prepared_tx = tx_utils.prepare_tx_for_signing(hex_tx, [last_input])
with FinalizableSigner(self.secure_signer) as signer:
signed_tx = signer.sign_transaction(prepared_tx)
# log the actual byte count
tx_byte_count = tx_utils.get_byte_count(signed_tx)
logging.info('The actual transaction size is %d bytes', tx_byte_count)
signed_hextx = signed_tx.as_hex()
logging.info('Signed hextx=%s', signed_hextx)
# verify transaction before broadcasting
tx_utils.verify_transaction(signed_hextx, op_return_value)
# send tx and persist txid
tx_id = self.connector.broadcast_tx(signed_tx)
if tx_id:
logging.info('Broadcast transaction with txid %s', tx_id)
else:
logging.warning(
'could not broadcast transaction but you can manually do it! signed hextx=%s', signed_hextx)
return tx_id
def issue_on_blockchain(self, revocation_address):
"""
Issue the certificates on the Bitcoin blockchain
:param revocation_address:
:return:
"""
transactions_data = self.create_transactions(revocation_address)
for transaction_data in transactions_data:
unsigned_tx_file_name = transaction_data.batch_metadata.unsigned_tx_file_name
signed_tx_file_name = transaction_data.batch_metadata.unsent_tx_file_name
sent_tx_file_name = transaction_data.batch_metadata.sent_tx_file_name
# persist the transaction in case broadcasting fails
hex_tx = hexlify(transaction_data.tx.serialize())
with open(unsigned_tx_file_name, 'w') as out_file:
out_file.write(hex_tx)
# sign transaction and persist result
signed_tx = self.signer.sign_tx(hex_tx, transaction_data.tx_input, self.netcode)
# log the actual byte count
tx_byte_count = tx_utils.get_byte_count(signed_tx)
logging.info('The actual transaction size is %d bytes', tx_byte_count)
signed_hextx = signed_tx.as_hex()
with open(signed_tx_file_name, 'w') as out_file:
out_file.write(signed_hextx)
# verify transaction before broadcasting
tx_utils.verify_transaction(signed_hextx, transaction_data.op_return_value)
# send tx and persist txid
tx_id = self.connector.broadcast_tx(signed_tx)
if tx_id:
logging.info('Broadcast transaction with txid %s', tx_id)
else:
logging.warning(
'could not broadcast transaction but you can manually do it! signed hextx=%s', signed_hextx)
self.persist_tx(sent_tx_file_name, tx_id)
def issue_on_blockchain(self):
"""
Issue the certificates on the Bitcoin blockchain
:param revocation_address:
:return:
"""
self.tree.make_tree()
op_return_value_bytes = unhexlify(self.tree.get_merkle_root())
op_return_value = hexlify(op_return_value_bytes)
for attempt_number in range(0, self.max_retry):
try:
if self.prepared_inputs:
inputs = self.prepared_inputs
else:
spendables = self.connector.get_unspent_outputs(
self.secure_signer.issuing_address)
if not spendables:
error_message = 'No money to spend at address {}'.format(
self.secure_signer.issuing_address)
logging.error(error_message)
raise InsufficientFundsError(error_message)
cost = self.transaction_handler.estimate_cost_for_certificate_batch(
)
current_total = 0
inputs = []
random.shuffle(spendables)
for s in spendables:
inputs.append(s)
current_total += s.coin_value
if current_total > cost:
break
tx = self.transaction_handler.create_transaction(
inputs, op_return_value_bytes)
hex_tx = hexlify(tx.serialize())
logging.info('Unsigned hextx=%s', hex_tx)
prepared_tx = tx_utils.prepare_tx_for_signing(hex_tx, inputs)
with FinalizableSigner(self.secure_signer) as signer:
signed_tx = signer.sign_transaction(prepared_tx)
# log the actual byte count
tx_byte_count = tx_utils.get_byte_count(signed_tx)
logging.info('The actual transaction size is %d bytes',
tx_byte_count)
signed_hextx = signed_tx.as_hex()
logging.info('Signed hextx=%s', signed_hextx)
# verify transaction before broadcasting
tx_utils.verify_transaction(signed_hextx, op_return_value)
# send tx and persist txid
tx_id = self.connector.broadcast_tx(signed_tx)
logging.info('Broadcast transaction with txid %s', tx_id)
return tx_id
except BroadcastError:
logging.warning(
'Failed broadcast reattempts. Trying to recreate transaction. This is attempt number %d',
attempt_number)
logging.error(
'All attempts to broadcast failed. Try rerunning issuer.')
raise BroadcastError(
'All attempts to broadcast failed. Try rerunning issuer.')