# -*- coding: utf-8 -*-
"""
Copyright (c) 2018 beyond-blockchain.org.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""
import os
import sys
current_dir = os.path.abspath(os.path.dirname(__file__))
sys.path.append(os.path.join(current_dir, "../.."))
from bbclib.libs import bbclib_utils
from bbclib import id_length_conf
[docs]class BBcCrossRef:
"""CrossRef part in a transaction"""
def __init__(self, domain_id=None, transaction_id=None, unpack=None):
self.domain_id = domain_id
self.transaction_id = transaction_id
if unpack is not None:
self.unpack(unpack)
def __str__(self):
ret = "Cross_Ref:\n"
ret += " domain_id: %s\n" % bbclib_utils.str_binary(self.domain_id)
ret += " transaction_id: %s\n" % bbclib_utils.str_binary(self.transaction_id)
return ret
[docs] def pack(self):
"""Pack this object
Returns:
bytes: packed binary data
"""
dat = bytearray(bbclib_utils.to_bigint(self.domain_id))
dat.extend(bbclib_utils.to_bigint(self.transaction_id, id_length_conf["transaction_id"]))
return bytes(dat)
[docs] def unpack(self, data):
"""Unpack into this object
Args:
data (bytes): packed binary data
Returns:
bool: True if successful
"""
ptr = 0
try:
ptr, self.domain_id = bbclib_utils.get_bigint(ptr, data)
ptr, self.transaction_id = bbclib_utils.get_bigint(ptr, data)
except:
return False
return True