def test_verify_transaction(self):
tx_input = Spendable(200, '18eKkAWyU9kvRNHPKxnZb6wwtPMrNmRRRA',
h2b('8443b07464c762d7fb404ea918a5ac9b3618d5cd6a0c5ea6e4dd5d7bbe28b154'), 0)
tx_outs = [tx_utils.create_transaction_output('mgAqW5ZCnEp7fjvpj8RUL3WxsBy8rcDcCi', 0.0000275)]
op_return_val = h2b('e9cee71ab932fde863338d08be4de9dfe39ea049bdafb342ce659ec5450b69ae')
tx = tx_utils.create_trx(op_return_val, 3, 'mgAqW5ZCnEp7fjvpj8RUL3WxsBy8rcDcCi', tx_outs, tx_input)
hextx = hexlify(tx.serialize())
tx_utils.verify_transaction(hextx, hexlify(op_return_val))
def test_verify_transaction(self):
cost = TransactionCosts(0.0001, 0.0000275, 3)
tx_input = Spendable(200, '18eKkAWyU9kvRNHPKxnZb6wwtPMrNmRRRA',
h2b('8443b07464c762d7fb404ea918a5ac9b3618d5cd6a0c5ea6e4dd5d7bbe28b154'), 0)
tx_outs = [trx_utils.create_transaction_output('mgAqW5ZCnEp7fjvpj8RUL3WxsBy8rcDcCi', 0.0000275)]
op_return_val = h2b('e9cee71ab932fde863338d08be4de9dfe39ea049bdafb342ce659ec5450b69ae')
tx = trx_utils.create_trx(op_return_val, cost, 'mgAqW5ZCnEp7fjvpj8RUL3WxsBy8rcDcCi', tx_outs, tx_input)
hextx = hexlify(tx.serialize())
trx_utils.verify_transaction(hextx, hexlify(op_return_val))
def issue_on_blockchain(self, wallet, revocation_address, split_input_trxs,
allowable_wif_prefixes, broadcast_function,
issuing_transaction_cost):
trxs = self.create_transactions(wallet, revocation_address,
issuing_transaction_cost,
split_input_trxs)
for td in trxs:
# persist tx
hextx = hexlify(td.tx.serialize())
with open(td.unsigned_tx_file_name, 'w') as out_file:
out_file.write(hextx)
# sign transaction and persist result
signed_hextx = trx_utils.sign_tx(hextx, td.tx_input,
allowable_wif_prefixes)
with open(td.signed_tx_file_name, 'w') as out_file:
out_file.write(signed_hextx)
# verify
cert_utils.verify_transaction(td.op_return_value, signed_hextx)
# send tx and persist txid
txid = trx_utils.send_tx(broadcast_function, signed_hextx)
self.finish_tx(td.sent_tx_file_name, txid)
def create_transactions(self, wallet, revocation_address,
issuing_transaction_cost, split_input_trxs):
# finish tree
self.tree.make_tree()
op_return_value = unhexlify(self.tree.get_merkle_root())
unspent_outputs = wallet.get_unspent_outputs(self.issuing_address)
last_output = unspent_outputs[-1]
txouts = self.build_txouts(issuing_transaction_cost)
txouts = txouts + [
trx_utils.create_transaction_output(
revocation_address, issuing_transaction_cost.min_per_output)
]
tx = trx_utils.create_trx(op_return_value, issuing_transaction_cost,
self.issuing_address, txouts, last_output)
unsigned_tx_file_name = convert_file_name(
self.config.unsigned_txs_file_pattern, self.batch_id)
unsent_tx_file_name = convert_file_name(
self.config.signed_txs_file_pattern, self.batch_id)
sent_tx_file_name = convert_file_name(
self.config.sent_txs_file_pattern, self.batch_id)
td = TransactionData(uid=self.batch_id,
tx=tx,
tx_input=last_output,
op_return_value=hexlify(op_return_value),
unsigned_tx_file_name=unsigned_tx_file_name,
signed_tx_file_name=unsent_tx_file_name,
sent_tx_file_name=sent_tx_file_name)
return [td]
def test_create_trx(self):
tx_input = Spendable(200, '18eKkAWyU9kvRNHPKxnZb6wwtPMrNmRRRA',
h2b('8443b07464c762d7fb404ea918a5ac9b3618d5cd6a0c5ea6e4dd5d7bbe28b154'), 0)
tx_outs = [tx_utils.create_transaction_output('mgAqW5ZCnEp7fjvpj8RUL3WxsBy8rcDcCi', 0.0000275)]
tx = tx_utils.create_trx('TEST'.encode('utf-8'), 3, 'mgAqW5ZCnEp7fjvpj8RUL3WxsBy8rcDcCi', tx_outs, tx_input)
hextx = hexlify(tx.serialize())
self.assertEquals(hextx,
'01000000018443b07464c762d7fb404ea918a5ac9b3618d5cd6a0c5ea6e4dd5d7bbe28b1540000000000ffffffff0300000000000000001976a914072a22e5913cd939904c46bbd0bc56755543384b88acc5000000000000001976a914072a22e5913cd939904c46bbd0bc56755543384b88ac0000000000000000066a045445535400000000')
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 test_bitcoind_connector_spendables(self):
bc = BitcoindConnector('XTN')
spendables = bc.spendables_for_address('mz7poFND7hVGRtPWjiZizcCnjf6wEDWjjT')
self.assertEquals(len(spendables), 3)
self.assertEquals(hexlify(spendables[0].tx_hash),
'08f6528ac70c828e1633babc8f0d49ecb11649fd7451f76923821a0dbc81eb34')
self.assertEquals(spendables[0].coin_value, 49000000)
self.assertEquals(spendables[1].coin_value, 2750)
self.assertEquals(spendables[2].coin_value, 2750)
def test_create_trx(self):
cost = TransactionCosts(0.0001, 0.0000275, 3)
tx_input = Spendable(200, '18eKkAWyU9kvRNHPKxnZb6wwtPMrNmRRRA',
h2b('8443b07464c762d7fb404ea918a5ac9b3618d5cd6a0c5ea6e4dd5d7bbe28b154'), 0)
tx_outs = [trx_utils.create_transaction_output('mgAqW5ZCnEp7fjvpj8RUL3WxsBy8rcDcCi', 0.0000275)]
tx = trx_utils.create_trx('TEST'.encode('utf-8'), cost, 'mgAqW5ZCnEp7fjvpj8RUL3WxsBy8rcDcCi', tx_outs, tx_input)
hextx = hexlify(tx.serialize())
self.assertEquals(hextx,
'01000000018443b07464c762d7fb404ea918a5ac9b3618d5cd6a0c5ea6e4dd5d7bbe28b1540000000000ffffffff0300000000000000001976a914072a22e5913cd939904c46bbd0bc56755543384b88acc5000000000000001976a914072a22e5913cd939904c46bbd0bc56755543384b88ac0000000000000000066a045445535400000000')
def test_bitcoind_connector_spendables(self):
bitcoin.SelectParams('testnet')
bc = BitcoindConnector('XTN')
spendables = bc.spendables_for_address('mz7poFND7hVGRtPWjiZizcCnjf6wEDWjjT')
self.assertEquals(len(spendables), 3)
self.assertEquals(hexlify(spendables[0].tx_hash),
'08f6528ac70c828e1633babc8f0d49ecb11649fd7451f76923821a0dbc81eb34')
self.assertEquals(spendables[0].coin_value, 49000000)
self.assertEquals(spendables[1].coin_value, 2750)
self.assertEquals(spendables[2].coin_value, 2750)
def create_transactions(self, revocation_address,
issuing_transaction_cost):
"""
Create the batch Bitcoin transaction
:param revocation_address:
:param issuing_transaction_cost:
:return:
"""
self.tree.make_tree()
spendables = 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]
op_return_value = unhexlify(self.tree.get_merkle_root())
tx_outs = self.build_recipient_tx_outs()
tx_outs.append(
trx_utils.create_transaction_output(
revocation_address, issuing_transaction_cost.min_per_output))
transaction = trx_utils.create_trx(op_return_value,
issuing_transaction_cost,
self.issuing_address, tx_outs,
last_input)
unsigned_tx_file_name = convert_file_name(
self.config.unsigned_txs_file_pattern, self.batch_id)
unsent_tx_file_name = convert_file_name(
self.config.signed_txs_file_pattern, self.batch_id)
sent_tx_file_name = convert_file_name(
self.config.sent_txs_file_pattern, self.batch_id)
transaction_data = TransactionData(
uid=self.batch_id,
tx=transaction,
tx_input=last_input,
op_return_value=hexlify(op_return_value),
unsigned_tx_file_name=unsigned_tx_file_name,
signed_tx_file_name=unsent_tx_file_name,
sent_tx_file_name=sent_tx_file_name)
return [transaction_data]
def issue_on_blockchain(self, revocation_address,
issuing_transaction_cost):
"""
Issue the certificates on the Bitcoin blockchain
:param revocation_address:
:param issuing_transaction_cost:
:return:
"""
transactions_data = self.create_transactions(revocation_address,
issuing_transaction_cost)
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 = trx_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
trx_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 _build_certificate_transactions(wallet, issuing_address,
revocation_address, certificate_metadata,
fees, tail):
"""Make transactions for the certificates.
"""
logging.info('Creating tx of certificate for recipient uid: %s ...',
certificate_metadata.uid)
with open(certificate_metadata.certificate_hash_file_name,
'rb') as in_file:
# this is the recipient-specific hash that will be recorded on the
# blockchain
hashed_certificate = in_file.read()
cert_out = CMutableTxOut(0, CScript([OP_RETURN, hashed_certificate]))
# send a transaction to the recipient's public key, and to a revocation
# address
txouts = create_recipient_outputs(certificate_metadata.pubkey,
revocation_address,
fees.min_per_output)
# define transaction inputs
unspent_outputs = wallet.get_unspent_outputs(issuing_address)
last_input = unspent_outputs[tail]
txins = [CTxIn(last_input.outpoint)]
value_in = last_input.amount
# very important! If we don't send the excess change back to ourselves,
# some lucky miner gets it!
amount = value_in - fees.cost_per_transaction
if amount > 0:
change_out = create_transaction_output(issuing_address, amount)
txouts = txouts + [change_out]
txouts = txouts + [cert_out]
tx = CMutableTransaction(txins, txouts)
# this is the transaction for a recipient, unsigned
hextx = hexlify(tx.serialize())
with open(certificate_metadata.unsigned_tx_file_name,
'wb') as out_file:
out_file.write(bytes(hextx, 'utf-8'))
logging.info('Created unsigned tx for recipient; last_input=%s',
last_input)
return last_input
def _build_certificate_transactions(wallet, issuing_address, revocation_address, certificate_metadata, fees, tail):
"""Make transactions for the certificates.
"""
logging.info('Creating tx of certificate for recipient uid: %s ...',
certificate_metadata.uid)
with open(certificate_metadata.certificate_hash_file_name, 'rb') as in_file:
# this is the recipient-specific hash that will be recorded on the
# blockchain
hashed_certificate = in_file.read()
cert_out = CMutableTxOut(0, CScript([OP_RETURN, hashed_certificate]))
# send a transaction to the recipient's public key, and to a revocation
# address
txouts = create_recipient_outputs(
certificate_metadata.pubkey, revocation_address, fees.min_per_output)
# define transaction inputs
unspent_outputs = wallet.get_unspent_outputs(issuing_address)
last_input = unspent_outputs[tail]
txins = [CTxIn(last_input.outpoint)]
value_in = last_input.amount
# very important! If we don't send the excess change back to ourselves,
# some lucky miner gets it!
amount = value_in - fees.cost_per_transaction
if amount > 0:
change_out = create_transaction_output(issuing_address, amount)
txouts = txouts + [change_out]
txouts = txouts + [cert_out]
tx = CMutableTransaction(txins, txouts)
# this is the transaction for a recipient, unsigned
hextx = hexlify(tx.serialize())
with open(certificate_metadata.unsigned_tx_file_name, 'wb') as out_file:
out_file.write(bytes(hextx, 'utf-8'))
logging.info(
'Created unsigned tx for recipient; last_input=%s', last_input)
return last_input
def create_transactions(self, revocation_address):
"""
Create the batch Bitcoin transaction
:param revocation_address:
:return:
"""
self.tree.make_tree()
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]
op_return_value = unhexlify(self.tree.get_merkle_root())
tx_outs = self.build_recipient_tx_outs()
tx_outs.append(
tx_utils.create_transaction_output(
revocation_address,
self.tx_cost_constants.get_minimum_output_coin()))
transaction = tx_utils.create_trx(op_return_value, self.total,
self.issuing_address, tx_outs,
last_input)
transaction_data = TransactionData(
uid=self.batch_id,
tx=transaction,
tx_input=last_input,
op_return_value=hexlify(op_return_value),
batch_metadata=self.batch_metadata)
return [transaction_data]
def issue_on_blockchain(self, revocation_address, issuing_transaction_cost):
"""
Issue the certificates on the Bitcoin blockchain
:param revocation_address:
:param issuing_transaction_cost:
:return:
"""
transactions_data = self.create_transactions(revocation_address, issuing_transaction_cost)
for transaction_data in transactions_data:
# persist the transaction in case broadcasting fails
hex_tx = hexlify(transaction_data.tx.serialize())
with open(transaction_data.unsigned_tx_file_name, 'w') as out_file:
out_file.write(hex_tx)
# sign transaction and persist result
signed_tx = trx_utils.sign_tx(hex_tx, transaction_data.tx_input)
# log the actual byte count
tx_byte_count = trx_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(transaction_data.signed_tx_file_name, 'w') as out_file:
out_file.write(signed_hextx)
# verify transaction before broadcasting
trx_utils.verify_transaction(signed_hextx, transaction_data.op_return_value)
# send tx and persist txid
tx_id = 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.finish_tx(transaction_data.sent_tx_file_name, tx_id)
def bitcoind_broadcast(hextx):
tx = CTransaction.deserialize(unhexlify(hextx))
txid = bitcoin.rpc.Proxy().sendrawtransaction(tx)
return hexlify(txid)
def broadcast_tx(self, transaction):
as_hex = transaction.as_hex()
transaction = CTransaction.deserialize(unhexlify(as_hex))
tx_id = bitcoin.rpc.Proxy().sendrawtransaction(transaction)
# reverse endianness for bitcoind
return hexlify(bytearray(tx_id)[::-1])
def broadcast_tx(self, transaction):
as_hex = transaction.as_hex()
transaction = CTransaction.deserialize(unhexlify(as_hex))
tx_id = bitcoin.rpc.Proxy().sendrawtransaction(transaction)
# reverse endianness for bitcoind
return hexlify(bytearray(tx_id)[::-1])
def bitcoind_broadcast(hextx):
tx = CTransaction.deserialize(unhexlify(hextx))
txid = bitcoin.rpc.Proxy().sendrawtransaction(tx)
return hexlify(txid)
def bitcoind_broadcast(hextx):
tx = CTransaction.deserialize(unhexlify(hextx))
txid = bitcoin.rpc.Proxy().sendrawtransaction(tx)
# reverse endianness for bitcoind
return hexlify(bytearray(txid)[::-1])
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.')