def __getitem__(self, hash_and_pc):
res = self.txos.get_by_hash(_hash(hash_and_pc))
if not res:
raise KeyError(hash_and_pc)
utxo = IOput()
utxo.deserialize(res)
return utxo
def remove(self, n):
self.commitments.remove(n)
ser_removed_outputs = self.txos.remove(n)
removed_outputs = []
for _ser in ser_removed_outputs:
utxo = IOput()
utxo.deserialize(_ser)
removed_outputs.append(utxo)
return removed_outputs
def remove(self, n, wtx):
self.commitments.remove(n, wtx=wtx)
ser_removed_outputs = self.txos.remove(n, wtx=wtx)
removed_outputs = []
for _ser in ser_removed_outputs:
utxo = IOput()
utxo.deserialize_with_context(_ser)
removed_outputs.append(utxo)
return removed_outputs
def find(self, hash_and_pc):
'''
In contrast with __getitem__ find will try to find even spent
outputs for other (syncing) nodes.
'''
res = self.txos.find_by_hash(_hash(hash_and_pc))
if not res:
raise KeyError(hash_and_pc)
utxo = IOput()
utxo.deserialize(res)
return utxo
def generate(self, change_address=None):
if self.coinbase:
raise Exception(
"generate() can be used only for common transaction, to create block transaction as miner use compose_block_transaction"
)
if not len(self.inputs):
raise Exception("Tx should have at least one input")
if not len(self._destinations):
raise Exception("Tx should have at least one destination")
for ioput in self.inputs:
if not self.key_manager:
raise Exception(
"Trying to generate tx which spends unknown input (KeyManager is None)"
)
if not ioput.detect_value(self.key_manager):
raise Exception(
"Trying to generate tx which spends unknown input")
in_value = sum([ioput.value for ioput in self.inputs])
out_value = sum([destination[1] for destination in self._destinations])
relay_fee = self.calc_relay_fee()
# +1 for destination is for change address
self.fee = relay_fee + self.calc_new_outputs_fee(
len(self.inputs),
len(self._destinations) + 1)
remainder = in_value - out_value - self.fee
if remainder < 0:
raise Exception("Not enough money in inputs to cover outputs")
# TODO We need logic here to cover too low remainders (less than new output fee)
change_address = change_address if change_address else self.key_manager.new_address(
) # TODO Check: for first glance, we cannot get here if key_manager is None.
self._destinations.append((change_address, remainder))
privkey_sum = 0
out_blinding_key_sum = None
for out_index in range(len(self._destinations) - 1):
address, value = self._destinations[out_index]
output = IOput()
output.fill(address, value, generator=default_generator_ser)
self.outputs.append(output)
out_blinding_key_sum = out_blinding_key_sum + output.blinding_key if out_blinding_key_sum else output.blinding_key
# privkey for the last one output isn't arbitrary
address, value = self._destinations[-1]
in_blinding_key_sum = None
for _input in self.inputs:
in_blinding_key_sum = in_blinding_key_sum + _input.blinding_key if in_blinding_key_sum else _input.blinding_key
in_blinding_key_sum += self.key_manager.priv_by_pub(
_input.address.pubkey
) # we can't get here if key_manager is None
output = IOput()
output.fill(
address,
value,
blinding_key=in_blinding_key_sum - out_blinding_key_sum,
relay_fee=relay_fee,
generator=default_generator_ser
) #TODO relay fee should be distributed uniformly, privacy leak
self.outputs.append(output)
[output.generate() for output in self.outputs]
self.sort_ioputs()
self.verify()
def rollback(self, pruned_inputs, num_of_added_outputs, prev_state):
for r_i in pruned_inputs:
if self.storage_space.utxo_index:
#r_i[0][2] is serialized txo (0 is txo, 2 is serialized object)
utxo = IOput()
utxo.deserialize(r_i[0][2])
self.storage_space.utxo_index.add_utxo(utxo)
self.confirmed.unspend(r_i)
outputs_for_mempool = self.confirmed.remove(num_of_added_outputs)
for _o in outputs_for_mempool:
self.mempool[_o.serialized_index] = _o
self.storage_space.utxo_index.remove_utxo(_o)
self.confirmed.set_state(prev_state)
def process_new_txos(message):
try:
serialized_utxos = bytes(message["txos"])
txos_hashes = bytes(message["txos_hashes"])
num = message["num"]
#txos_hashes = [txos_hashes[i*65:(i+1)*65)] for i in range(0,num)]
txos_lengths = message["txos_lengths"]
#TODO we should use txos_hashes and txos_lengths to proccess only unknown txos
for i in range(num):
utxo = IOput()
serialized_utxos = utxo.deserialize_raw(serialized_utxos)
storage_space.txos_storage.mempool[utxo.serialized_index] = utxo
storage_space.blockchain.update(reason="downloaded new txos")
except Exception as e:
raise e #XXX "DoS messages should be returned"
def give_block_template(self):
if not self.key_manager:
raise Exception("Key manager is not set")
transaction_fees = self.give_tx().relay_fee if self.give_tx() else 0
value = next_reward(
self.storage_space.blockchain.current_tip,
self.storage_space.headers_storage) + transaction_fees
coinbase = IOput()
coinbase.fill(
self.key_manager.new_address(),
value,
relay_fee=0,
coinbase=True,
lock_height=self.storage_space.blockchain.current_height + 1 +
coinbase_maturity)
coinbase.generate()
self.storage_space.txos_storage.mempool[
coinbase.serialized_index] = coinbase
tx = Transaction(txos_storage=self.storage_space.txos_storage,
key_manager=self.key_manager)
tx.add_coinbase(coinbase)
tx.compose_block_transaction()
block = generate_block_template(tx, self.storage_space)
self.add_block_template(block)
return block
def test_ioput_indexes():
_input1 = IOput()
_input1.fill(adr1, 100)
_input1.generate(exp=2, concealed_bits=3)
assert _input1.index_len == 32 + 33
assert len(_input1.serialized_index) == 32 + 33
assert len(_input1.commitment_index) == 32 + 33
print("ioput_indexes len OK")
def get(self, hash_and_pc, rtx):
res = self.txos.get_by_hash(sha256(hash_and_pc), rtx=rtx)
if not res:
raise KeyError(hash_and_pc)
utxo = IOput()
utxo.deserialize_with_context(res)
utxo.set_verified_and_correct() #Trust saved outputs
return utxo
def process_new_txos(message, wtx, core):
try:
serialized_utxos = bytes(message["txos"])
txos_hashes = bytes(message["txos_hashes"])
num = message["num"]
txos_lengths = message["txos_lengths"]
txos_hashes = [txos_hashes[i * 65:(i + 1) * 65] for i in range(0, num)]
txos_lengths = [
int.from_bytes(txos_lengths[i * 2:(i + 1) * 2], "big")
for i in range(0, num)
]
for i in range(num):
txo_len, txo_hash = txos_lengths[i], txos_hashes[i]
if txo_hash in core.storage_space.txos_storage.mempool:
serialized_utxos = serialized_utxos[txo_len:]
continue
utxo = IOput()
serialized_utxos = utxo.deserialize_raw(serialized_utxos)
core.storage_space.txos_storage.mempool[
utxo.serialized_index] = utxo
core.storage_space.blockchain.update(wtx=wtx,
reason="downloaded new txos")
except Exception as e:
raise DOSException() #TODO add info
def find(self, hash_and_pc, rtx):
'''
In contrast with __getitem__ find will try to find even spent
outputs for other (syncing) nodes.
'''
res = self.txos.find_by_hash(sha256(hash_and_pc), rtx=rtx)
if not res:
raise KeyError(hash_and_pc)
utxo = IOput()
utxo.deserialize_with_context(res)
utxo.set_verified_and_correct() #Trust saved outputs
return utxo
def ioput_encrypted_messsage():
_input1 = IOput()
_input1.fill(adr1, 100)
_input1.generate(exp=2, concealed_bits=3)
_input2 = IOput(binary_object=_input1.serialize())
_input2.verify()
_input2.detect_value({'priv_by_pub': {adr1.serialized_pubkey: keys[0]}})
assert _input1.value == _input2.value
assert _input1.blinding_key.serialize() == _input2.blinding_key.serialize()
print("ioput_encrypted_message OK")
def deserialize(self, serialized_tx, rtx, skip_verification=False):
self.serialized = None
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for inputs array length"
)
inputs_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[2:]
(inputs_len, ) = struct.unpack("> H", inputs_len_buffer)
for _input_index in range(inputs_len):
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for input %s length"
% _input_index)
input_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[
2:]
(input_len, ) = struct.unpack("> H", input_len_buffer)
if len(serialized_tx) < input_len:
raise Exception(
"Serialized transaction doesn't contain enough bytes for input %s"
% _input_index)
input_index_buffer, serialized_tx = serialized_tx[:
input_len], serialized_tx[
input_len:]
if not skip_verification:
if (not self.txos_storage.confirmed.has(input_index_buffer,
rtx=rtx)):
raise Exception("Unknown input index")
self.inputs.append(
self.txos_storage.confirmed.get(input_index_buffer,
rtx=rtx))
else:
self.inputs.append(input_index_buffer)
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for outputs array length"
)
outputs_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[
2:]
(outputs_len, ) = struct.unpack("> H", outputs_len_buffer)
for _output_index in range(outputs_len):
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for output %s length"
% _output_index)
output_len_buffer, serialized_tx = serialized_tx[:
2], serialized_tx[
2:]
(output_len, ) = struct.unpack("> H", output_len_buffer)
if len(serialized_tx) < output_len:
raise Exception(
"Serialized transaction doesn't contain enough bytes for output %s"
% _output_index)
output_buffer, serialized_tx = serialized_tx[:
output_len], serialized_tx[
output_len:]
self.outputs.append(IOput(binary_object=output_buffer))
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for additional excesses array length"
)
aes_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[2:]
(aes_len, ) = struct.unpack("> H", aes_len_buffer)
for _ae in range(aes_len):
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for additional excess %s length"
% _ae)
ae_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[2:]
(ae_len, ) = struct.unpack("> H", ae_len_buffer)
if len(serialized_tx) < ae_len:
raise Exception(
"Serialized transaction doesn't contain enough bytes for additional excess %s"
% _ae)
ae_buffer, serialized_tx = serialized_tx[:ae_len], serialized_tx[
ae_len:]
e = Excess.from_serialized(ae_buffer)
self.additional_excesses.append(e)
for _ue in range(inputs_len):
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for updated excess %s length"
% _ue)
ue_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[2:]
(ue_len, ) = struct.unpack("> H", ue_len_buffer)
if len(serialized_tx) < ue_len:
raise Exception(
"Serialized transaction doesn't contain enough bytes for updated excess %s"
% _ue)
ue_buffer, serialized_tx = serialized_tx[:ue_len], serialized_tx[
ue_len:]
e = Excess.from_serialized(ue_buffer)
#Depending on skif_verification self.inputs either contains inputs or serialized_indexes only
if isinstance(self.inputs[_ue], bytes):
self.updated_excesses[self.inputs[_ue]] = e
elif isinstance(self.inputs[_ue], IOput):
self.updated_excesses[self.inputs[_ue].serialized_index] = e
if len(serialized_tx) < 32:
raise Exception(
"Serialized transaction doesn't contain enough bytes for mixer_offset"
)
self.mixer_offset, serialized_tx = int.from_bytes(
serialized_tx[:32], "big"), serialized_tx[32:]
if not skip_verification:
self.verify(rtx=rtx)
def blindly_generate(self, change_address, input_data, relay_fee_per_kb=0):
self.serialized = None
if self.coinbase:
raise Exception(
"generate() can be used only for common transaction, to create block transaction as miner use compose_block_transaction"
)
if not len(input_data):
raise Exception("Tx should have at least one input")
if not len(self._destinations):
raise Exception("Tx should have at least one destination")
in_value = sum([ioput[1] for ioput in input_data])
out_value = sum([destination[1] for destination in self._destinations])
relay_fee = self.calc_relay_fee(relay_fee_per_kb=relay_fee_per_kb)
# +1 for destination is for change address
self.fee = relay_fee + self.calc_new_outputs_fee(
len(input_data),
len(self._destinations) + 1)
remainder = in_value - out_value - self.fee
if remainder < 0:
raise Exception("Not enough money in inputs to cover outputs")
# TODO We need logic here to cover too low remainders (less than new output fee)
self._destinations.append((change_address, remainder, True))
privkey_sum = 0
out_blinding_key_sum = None
need_proofs = []
excesses_key_sum = None
for out_index in range(len(self._destinations) - 1):
address, value, need_proof = self._destinations[out_index]
output = IOput()
output.fill(address, value, generator=default_generator_ser)
self.outputs.append(output)
out_blinding_key_sum = (
out_blinding_key_sum + output.blinding_key
) if out_blinding_key_sum else output.blinding_key
if need_proof:
need_proofs.append(
(output, PrivateKey()
)) #excesses will be generated after output generation
offset_pk = PrivateKey()
self.mixer_offset = int.from_bytes(offset_pk.private_key, "big")
# privkey for the last one output isn't arbitrary
address, value, need_proof = self._destinations[-1]
if need_proof:
need_proofs.append(
(output, PrivateKey()
)) #excesses will be generated after output generation
in_blinding_key_sum = None
burdens_to_be_covered = []
for i, v, priv_key, blinding_key, ser_apc in input_data:
in_blinding_key_sum = (
in_blinding_key_sum +
blinding_key) if in_blinding_key_sum else blinding_key
in_blinding_key_sum += priv_key
self.updated_excesses[i] = excess_from_private_key(
priv_key, b"\x01\x00" + ser_apc)
self.inputs.append(pseudoinput(
i, ser_apc)) #For tx serialization and sorts
if len(need_proofs):
excesses_key_sum = need_proofs[0][1]
for i in need_proofs[1:]:
excesses_key_sum += i[1]
output = IOput()
last_blinding_key = in_blinding_key_sum - out_blinding_key_sum - offset_pk
if excesses_key_sum:
last_blinding_key += excesses_key_sum
output.fill(
address,
value,
blinding_key=last_blinding_key,
relay_fee=relay_fee,
generator=default_generator_ser
) #TODO relay fee should be distributed uniformly, privacy leak
self.outputs.append(output)
[output.generate() for output in self.outputs]
for ae in need_proofs:
script = generate_proof_script(ae[0])
e = excess_from_private_key(ae[1], script)
self.additional_excesses.append(e)
self.sort_lists()
def deserialize_raw(self, serialized, storage_space=None):
if len(serialized) < 1:
raise Exception("Not enough bytes for tx skeleton version marker")
serialized, ser_version = serialized[1:], serialized[0]
rich_format = ser_version & 1
self.version = ser_version >> 1
if not self.version in [0]:
raise Exception("Unknown tx_sceleton version")
if len(serialized) < 2:
raise Exception("Not enough bytes for tx skeleton inputs len")
serialized, _len_i = serialized[2:], int.from_bytes(
serialized[:2], "big")
if len(serialized) < 2:
raise Exception("Not enough bytes for tx skeleton outputs len")
serialized, _len_o = serialized[2:], int.from_bytes(
serialized[:2], "big")
if len(serialized) < 2:
raise Exception(
"Not enough bytes for tx skeleton additional excesses len")
serialized, _len_ae = serialized[2:], int.from_bytes(
serialized[:2], "big")
serialized_index_len = IOput().index_len
for i in range(_len_i):
if len(serialized) < serialized_index_len:
raise Exception(
"Not enough bytes for tx skeleton' input index %d len" % i)
_input_index, serialized = serialized[:
serialized_index_len], serialized[
serialized_index_len:]
self.input_indexes.append(_input_index)
for i in range(_len_o):
if len(serialized) < serialized_index_len:
raise Exception(
"Not enough bytes for tx skeleton' output index %d len" %
i)
_output_index, serialized = serialized[:
serialized_index_len], serialized[
serialized_index_len:]
self.output_indexes.append(_output_index)
for i in range(_len_o):
if len(serialized) < 4:
raise Exception(
"Not enough bytes for tx skeleton' output relay fee %d len"
% i)
ser_relay_fee, serialized = serialized[:4], serialized[4:]
self.output_relay_fees.append(int.from_bytes(ser_relay_fee, "big"))
for i in range(_len_ae):
e = Excess()
serialized = e.deserialize_raw(serialized)
self.additional_excesses.append(e)
for i in range(_len_i):
e = Excess()
serialized = e.deserialize_raw(serialized)
self.updated_excesses[self.input_indexes[i]] = e
if len(serialized) < 32:
raise Exception("Not enough bytes for mixer offset")
self.mixer_offset, serialized = int.from_bytes(serialized[:32],
"big"), serialized[32:]
if not self.verify():
#TODO consider renmaing verify to validate_excesses or make exception text more general
raise Exception("Additional excesses are not signed properly")
if rich_format and storage_space:
txouts_num_serialized, serialized = serialized[:2], serialized[2:]
txouts_num = int.from_bytes(txouts_num_serialized, "big")
for _ in range(txouts_num):
output = IOput()
serialized = output.deserialize_raw(serialized)
if not (output.serialized_index in self.output_indexes):
raise Exception("Unknown output in rich txskel data")
storage_space.txos_storage.mempool[
output.serialized_index] = output
return serialized
def ioput_serialize_deserialize():
options = {
'address': [adr1],
'value': [1, 100, int(705e6 * 1e8)],
'relay_fee': [0, 100, int(1e8)],
'generator': [
None
], #b'\x0b\xf8x*\xe9\xdc\xb1\xfd\xe9k\x8eZ\xf9\x8250\xdcrLU`p\xbaD\xf1\xfdh\x93\xd7\x85\xb9\x9e\x07'], #TODO arbitraty value gen
'burden_hash': [None, b"\x44" * 32],
'coinbase': [True, False],
'lock_height': [0, 10, 10000]
}
all_possible_options = [{}]
for opt in options:
c = all_possible_options
all_possible_options = []
for i in options[opt]:
for prev in c:
n = prev.copy()
if i != None:
n[opt] = i
all_possible_options.append(n)
for var in all_possible_options:
_input1 = IOput()
_input1.fill(**var)
_input1.generate()
_input2 = IOput(binary_object=_input1.serialize())
_input2.verify()
assert _input1.version == _input2.version
assert _input1.block_version == _input2.block_version
assert _input1.lock_height == _input2.lock_height
assert _input1.authorized_pedersen_commitment.serialize(
) == _input2.authorized_pedersen_commitment.serialize()
assert _input1.address.serialize() == _input2.address.serialize()
assert _input1.rangeproof.proof == _input2.rangeproof.proof
assert _input1.encrypted_message == _input2.encrypted_message
assert _input1.generator == _input2.generator
assert _input1.relay_fee == _input2.relay_fee
assert _input1.authorized_burden == _input2.authorized_burden
print("ioput_serialize_deserialize OK")
def deserialize_raw(self, serialized, storage_space=None):
if len(serialized) < 1:
raise Exception(
"Not enough bytes for tx skeleton rich format marker")
serialized, rich_format = serialized[1:], bool(serialized[0])
if len(serialized) < 2:
raise Exception("Not enough bytes for tx skeleton inputs len")
serialized, _len_i = serialized[2:], int.from_bytes(
serialized[:2], "big")
if len(serialized) < 2:
raise Exception("Not enough bytes for tx skeleton outputs len")
serialized, _len_o = serialized[2:], int.from_bytes(
serialized[:2], "big")
if len(serialized) < 2:
raise Exception(
"Not enough bytes for tx skeleton additional excesses len")
serialized, _len_ae = serialized[2:], int.from_bytes(
serialized[:2], "big")
serialized_index_len = IOput().index_len
for i in range(_len_i):
if len(serialized) < serialized_index_len:
raise Exception(
"Not enough bytes for tx skeleton' input index %d len" % i)
_input_index, serialized = serialized[:
serialized_index_len], serialized[
serialized_index_len:]
self.input_indexes.append(_input_index)
for i in range(_len_o):
if len(serialized) < serialized_index_len:
raise Exception(
"Not enough bytes for tx skeleton' output index %d len" %
i)
_output_index, serialized = serialized[:
serialized_index_len], serialized[
serialized_index_len:]
self.output_indexes.append(_output_index)
for i in range(_len_ae):
e = Excess()
serialized = e.deserialize_raw(serialized)
self.additional_excesses.append(e)
if not self.verify():
#TODO consider renmaing verify to validate_excesses or make exception text more general
raise Exception("Additional excesses are not signed properly")
if rich_format and storage_space:
txouts_num_serialized, serialized = serialized[:2], serialized[2:]
txouts_num = int.from_bytes(txouts_num_serialized, "big")
for _ in range(txouts_num):
output = IOput()
serialized = output.deserialize_raw(serialized)
if not (output.serialized_index in self.output_indexes):
raise Exception("Unknown output in rich txskel data")
storage_space.txos_storage.mempool[
output.serialized_index] = output
if not GLOBAL_TEST['skip combined excesses']:
raise NotImplemented
return serialized
def ioput_proofs_info():
_input1 = IOput()
_input1.fill(adr1, 100)
_input1.version = 1 #To use RangeProof instead of BulletProofs
_input1.generate(exp=2, concealed_bits=3)
info = _input1.info()
assert info['exp'] == 2
assert info['min_value'] == 0
assert info['max_value'] == 700
_input1 = IOput()
_input1.fill(adr1, 3)
_input1.version = 1 #To use RangeProof instead of BulletProofs
_input1.generate(exp=0, concealed_bits=3, min_value=1)
info = _input1.info()
assert info['exp'] == 0
assert info['mantissa'] == 3
assert info['min_value'] == 1
assert info['max_value'] == 8
_input1 = IOput()
_input1.fill(adr1, 300)
_input1.version = 1 #To use RangeProof instead of BulletProofs
#coceanled bits cannot be less than bits in value
_input1.generate(exp=0, concealed_bits=3)
info = _input1.info()
assert info['exp'] == 0
assert info['mantissa'] == 9
assert info['min_value'] == 0
assert info['max_value'] == 511
print("ioput_proofs_info OK")
_input1 = IOput()
_input1.fill(adr1, 300)
_input1.generate()
info = _input1.info()
assert info['exp'] == 0
assert info['mantissa'] == 0
assert info['min_value'] == 0
assert info['max_value'] == 2**64 - 1
def deserialize(self, serialized_tx):
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for inputs array length"
)
inputs_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[2:]
(inputs_len, ) = struct.unpack("> H", inputs_len_buffer)
for _input_index in range(inputs_len):
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for input %s length"
% _input_index)
input_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[
2:]
(input_len, ) = struct.unpack("> H", input_len_buffer)
if len(serialized_tx) < input_len:
raise Exception(
"Serialized transaction doesn't contain enough bytes for input %s"
% _input_index)
input_index_buffer, serialized_tx = serialized_tx[:
input_len], serialized_tx[
input_len:]
if not GLOBAL_TEST['spend from mempool']:
raise NotImplemented
else:
if not input_index_buffer in self.txos_storage.confirmed:
raise Exception("Unknown input index")
self.inputs.append(
self.txos_storage.confirmed[input_index_buffer])
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for outputs array length"
)
outputs_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[
2:]
(outputs_len, ) = struct.unpack("> H", outputs_len_buffer)
for _output_index in range(outputs_len):
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for output %s length"
% _output_index)
output_len_buffer, serialized_tx = serialized_tx[:
2], serialized_tx[
2:]
(output_len, ) = struct.unpack("> H", output_len_buffer)
if len(serialized_tx) < output_len:
raise Exception(
"Serialized transaction doesn't contain enough bytes for output %s"
% _output_index)
output_buffer, serialized_tx = serialized_tx[:
output_len], serialized_tx[
output_len:]
self.outputs.append(IOput(binary_object=output_buffer))
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for additional excesses array length"
)
aes_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[2:]
(aes_len, ) = struct.unpack("> H", aes_len_buffer)
for _ae in range(aes_len):
if len(serialized_tx) < 2:
raise Exception(
"Serialized transaction doesn't contain enough bytes for additional excess %s length"
% _ae)
ae_len_buffer, serialized_tx = serialized_tx[:2], serialized_tx[2:]
(ae_len, ) = struct.unpack("> H", ae_len_buffer)
if len(serialized_tx) < ae_len:
raise Exception(
"Serialized transaction doesn't contain enough bytes for additional excess %s"
% _ae)
ae_buffer, serialized_tx = serialized_tx[:ae_len], serialized_tx[
ae_len:]
e = Excess()
e.deserialize_raw(ae_buffer)
self.additional_excesses.append(e)
self.verify()
if not GLOBAL_TEST['skip combined excesses']:
raise NotImplemented
