# -*- 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.libs.bbclib_asset import BBcAsset
import bbclib
from bbclib import id_length_conf
[docs]class BBcEvent:
"""Event part in a transaction"""
def __init__(self, asset_group_id=None, id_length=None):
if id_length is not None:
bbclib.configure_id_length_all(id_length)
if asset_group_id is not None:
self.asset_group_id = asset_group_id[:id_length_conf["asset_group_id"]]
else:
self.asset_group_id = None
self.reference_indices = []
self.mandatory_approvers = []
self.option_approver_num_numerator = 0
self.option_approver_num_denominator = 0
self.option_approvers = []
self.asset = None
def __str__(self):
ret = " asset_group_id: %s\n" % bbclib_utils.str_binary(self.asset_group_id)
ret += " reference_indices: %s\n" % self.reference_indices
ret += " mandatory_approvers:\n"
if len(self.mandatory_approvers) > 0:
for user in self.mandatory_approvers:
ret += " - %s\n" % bbclib_utils.str_binary(user)
else:
ret += " - None\n"
ret += " option_approvers:\n"
if len(self.option_approvers) > 0:
for user in self.option_approvers:
ret += " - %s\n" % bbclib_utils.str_binary(user)
else:
ret += " - None\n"
ret += " option_approver_num_numerator: %d\n" % self.option_approver_num_numerator
ret += " option_approver_num_denominator: %d\n" % self.option_approver_num_denominator
ret += str(self.asset)
return ret
[docs] def add(self, asset_group_id=None, reference_index=None, mandatory_approver=None,
option_approver_num_numerator=0, option_approver_num_denominator=0, option_approver=None, asset=None):
"""Add parts"""
if asset_group_id is not None:
self.asset_group_id = asset_group_id[:id_length_conf["asset_group_id"]]
if reference_index is not None:
self.reference_indices.append(reference_index)
if mandatory_approver is not None:
self.mandatory_approvers.append(mandatory_approver[:id_length_conf["user_id"]])
if option_approver_num_numerator > 0:
self.option_approver_num_numerator = option_approver_num_numerator
if option_approver_num_denominator > 0:
self.option_approver_num_denominator = option_approver_num_denominator
if option_approver is not None:
self.option_approvers.append(option_approver[:id_length_conf["user_id"]])
if asset is not None:
self.asset = asset
return True
[docs] def pack(self):
"""Pack this object
Returns:
bytes: packed binary data
"""
if self.asset_group_id is None:
raise Exception("need asset_group_id in BBcEvent")
dat = bytearray(bbclib_utils.to_bigint(self.asset_group_id, size=id_length_conf["asset_group_id"]))
dat.extend(bbclib_utils.to_2byte(len(self.reference_indices)))
for i in range(len(self.reference_indices)):
dat.extend(bbclib_utils.to_2byte(self.reference_indices[i]))
dat.extend(bbclib_utils.to_2byte(len(self.mandatory_approvers)))
for i in range(len(self.mandatory_approvers)):
dat.extend(bbclib_utils.to_bigint(self.mandatory_approvers[i], size=id_length_conf["user_id"]))
dat.extend(bbclib_utils.to_2byte(self.option_approver_num_numerator))
dat.extend(bbclib_utils.to_2byte(self.option_approver_num_denominator))
for i in range(self.option_approver_num_denominator):
dat.extend(bbclib_utils.to_bigint(self.option_approvers[i], size=id_length_conf["user_id"]))
ast = self.asset.pack()
dat.extend(bbclib_utils.to_4byte(len(ast)))
dat.extend(ast)
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
id_length_asgid = 32
id_length_userid = 32
data_size = len(data)
try:
ptr, self.asset_group_id = bbclib_utils.get_bigint(ptr, data)
id_length_conf["asset_group_id"] = len(self.asset_group_id)
ptr, ref_num = bbclib_utils.get_n_byte_int(ptr, 2, data)
self.reference_indices = []
for i in range(ref_num):
ptr, idx = bbclib_utils.get_n_byte_int(ptr, 2, data)
self.reference_indices.append(idx)
if ptr >= data_size:
return False
ptr, appr_num = bbclib_utils.get_n_byte_int(ptr, 2, data)
self.mandatory_approvers = []
for i in range(appr_num):
ptr, appr = bbclib_utils.get_bigint(ptr, data)
id_length_conf["user_id"] = len(appr)
self.mandatory_approvers.append(appr)
if ptr >= data_size:
return False
ptr, self.option_approver_num_numerator = bbclib_utils.get_n_byte_int(ptr, 2, data)
ptr, self.option_approver_num_denominator = bbclib_utils.get_n_byte_int(ptr, 2, data)
self.option_approvers = []
for i in range(self.option_approver_num_denominator):
ptr, appr = bbclib_utils.get_bigint(ptr, data)
id_length_conf["user_id"] = len(appr)
self.option_approvers.append(appr)
if ptr >= data_size:
return False
ptr, astsize = bbclib_utils.get_n_byte_int(ptr, 4, data)
ptr, astdata = bbclib_utils.get_n_bytes(ptr, astsize, data)
self.asset = BBcAsset()
self.asset.unpack(astdata)
except:
return False
return True