/
test_type_encoding.py
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/
test_type_encoding.py
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# Python SCALE Codec Library
#
# Copyright 2018-2020 openAware BV (NL).
# This file is part of Polkascan.
#
# Polkascan is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Polkascan is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Polkascan. If not, see <http://www.gnu.org/licenses/>.
import unittest
from scalecodec.base import ScaleBytes, ScaleDecoder, RuntimeConfiguration
from scalecodec.metadata import MetadataDecoder
from scalecodec.type_registry import load_type_registry_preset
from scalecodec.types import CompactU32, Vec
from test.fixtures import metadata_v10_hex
class TestScaleTypeEncoding(unittest.TestCase):
@classmethod
def setUpClass(cls):
RuntimeConfiguration().clear_type_registry()
RuntimeConfiguration().update_type_registry(load_type_registry_preset("default"))
RuntimeConfiguration().update_type_registry(load_type_registry_preset("kusama"))
cls.metadata_decoder = MetadataDecoder(ScaleBytes(metadata_v10_hex))
cls.metadata_decoder.decode()
def test_u16(self):
obj = ScaleDecoder.get_decoder_class('u16')
obj.encode(64302)
self.assertEqual(str(obj.data), "0x2efb")
def test_i16(self):
obj = ScaleDecoder.get_decoder_class('i16')
obj.encode(-1234)
self.assertEqual(str(obj.data), "0x2efb")
def test_i16_out_of_bounds(self):
obj = ScaleDecoder.get_decoder_class('i16')
self.assertRaises(ValueError, obj.encode, -32769)
def test_compact_u32_1byte(self):
obj = ScaleDecoder.get_decoder_class('Compact<u32>', ScaleBytes("0x18"))
obj.decode()
obj = ScaleDecoder.get_decoder_class('Compact<u32>')
obj.encode(6)
self.assertEqual(str(obj.data), "0x18")
def test_compact_u32_2bytes(self):
obj = ScaleDecoder.get_decoder_class('Compact<u32>', ScaleBytes("0x18"))
obj.decode()
obj = ScaleDecoder.get_decoder_class('Compact<u32>')
obj.encode(6000)
self.assertEqual(str(obj.data), "0xc15d")
def test_compact_u32_4bytes(self):
obj = ScaleDecoder.get_decoder_class('Compact<u32>')
obj.encode(1000000)
self.assertEqual(str(obj.data), "0x02093d00")
def test_compact_u32_larger_than_4bytes(self):
obj = ScaleDecoder.get_decoder_class('Compact<u32>')
obj.encode(150000000000000)
self.assertEqual(str(obj.data), "0x0b0060b7986c88")
def test_compact_u32_encode_decode(self):
value = 2000001
obj = ScaleDecoder.get_decoder_class('Compact<u32>')
data = obj.encode(value)
obj = CompactU32(data)
self.assertEqual(obj.decode(), value)
def test_compact_u32_encode_decode_large(self):
value = 2**30
obj = CompactU32(ScaleBytes(bytearray()))
data = obj.encode(value)
obj = CompactU32(data)
self.assertEqual(obj.decode(), value)
def test_vec_string_encode_decode(self):
value = ['test', 'vec']
obj = ScaleDecoder.get_decoder_class('Vec<Bytes>')
data = obj.encode(value)
obj = ScaleDecoder.get_decoder_class('Vec<Bytes>', data)
self.assertEqual(obj.decode(), value)
def test_vec_accountid_encode_decode(self):
value = [
'0x0034d9d2dcdcd79451d95fd019a056d47dfa9926d762b94e63f06391b1545aee',
'0x2ce1929ab903f695bdeeeb79a588774d71468362129136f1b7f7b31a32958f98',
'0x88c47944e4aaf9d53a9627400f9a948bb5f355bda38702dbdeda0c5d34553128',
]
obj = ScaleDecoder.get_decoder_class('Vec<AccountId>')
data = obj.encode(value)
obj = ScaleDecoder.get_decoder_class('Vec<AccountId>', data)
self.assertEqual(obj.decode(), value)
def test_bytes_encode_decode(self):
value = 'This is a test'
obj = ScaleDecoder.get_decoder_class('Bytes')
data = obj.encode(value)
obj_check = ScaleDecoder.get_decoder_class('Bytes', data)
self.assertEqual(obj_check.decode(), value)
def test_hexbytes_encode_decode(self):
value = '0x5468697320697320612074657374'
obj = ScaleDecoder.get_decoder_class('HexBytes')
data = obj.encode(value)
obj_check = ScaleDecoder.get_decoder_class('HexBytes', data)
self.assertEqual(obj_check.decode(), value)
def test_accountid_encode_decode(self):
value = '0x586cb27c291c813ce74e86a60dad270609abf2fc8bee107e44a80ac00225c409'
obj = ScaleDecoder.get_decoder_class('AccountId')
data = obj.encode(value)
obj_check = ScaleDecoder.get_decoder_class('AccountId', data)
self.assertEqual(obj_check.decode(), value)
def test_compact_balance_encode_decode(self):
scale_data = ScaleBytes('0x070010a5d4e8')
value = 1000000000000
obj = ScaleDecoder.get_decoder_class('Compact<Balance>')
data = obj.encode(value)
self.assertEqual(str(scale_data), str(data))
obj_check = ScaleDecoder.get_decoder_class('Compact<Balance>', data)
self.assertEqual(obj_check.decode(), value)
def test_struct_encode_decode(self):
value = {'unstakeThreshold': 3, 'validatorPayment': 0}
scale_data = ScaleBytes("0x0c00")
obj = ScaleDecoder.get_decoder_class('ValidatorPrefsLegacy')
data = obj.encode(value)
self.assertEqual(str(scale_data), str(data))
obj_check = ScaleDecoder.get_decoder_class('ValidatorPrefsLegacy', data)
self.assertEqual(obj_check.decode(), value)
def test_enum_encode_decode(self):
value = "Stash"
obj = ScaleDecoder.get_decoder_class('RewardDestination')
data = obj.encode(value)
obj_check = ScaleDecoder.get_decoder_class('RewardDestination', data)
self.assertEqual(obj_check.decode(), value)
def test_enum_type_mapping_encode_decode(self):
RuntimeConfiguration().update_type_registry(load_type_registry_preset("test"))
value = {"AuthoritiesChange": ["0x586cb27c291c813ce74e86a60dad270609abf2fc8bee107e44a80ac00225c409"]}
obj = ScaleDecoder.get_decoder_class('DigestItem')
data = obj.encode(value)
obj_check = ScaleDecoder.get_decoder_class('DigestItem', data)
self.assertEqual(obj_check.decode(), value)
def test_option_empty_encode_decode(self):
value = None
obj = ScaleDecoder.get_decoder_class('Option<Bytes>')
data = obj.encode(value)
obj_check = ScaleDecoder.get_decoder_class('Option<Bytes>', data)
self.assertEqual(obj_check.decode(), value)
def test_option_bytes_encode_decode(self):
value = "Test"
obj = ScaleDecoder.get_decoder_class('Option<Bytes>')
data = obj.encode(value)
obj_check = ScaleDecoder.get_decoder_class('Option<Bytes>', data)
self.assertEqual(obj_check.decode(), value)
def test_proposal_encode_decode(self):
value = {
'call_module': 'System',
'call_function': 'remark',
'call_args': {
'_remark': '0x0123456789'
}
}
obj = ScaleDecoder.get_decoder_class('Box<Proposal>', metadata=self.metadata_decoder)
data = obj.encode(value)
obj_check = ScaleDecoder.get_decoder_class('Box<Proposal>', data, metadata=self.metadata_decoder)
obj_check.decode()
self.assertEqual(obj_check.value['call_module'], 'System')
self.assertEqual(obj_check.value['call_function'], 'remark')
self.assertEqual(obj_check.value['call_args'][0]['value'], '0x0123456789')
def test_set_encode_decode(self):
RuntimeConfiguration().update_type_registry(load_type_registry_preset("test"))
value = ['Display', 'Legal', 'Email', 'Twitter']
obj = ScaleDecoder.get_decoder_class('IdentityFields')
scale_data = obj.encode(value)
obj = ScaleDecoder.get_decoder_class('IdentityFields', scale_data)
obj.decode()
self.assertEqual(obj.value, value)
def test_data_encode_decode(self):
value = {"Raw": "Test"}
obj = ScaleDecoder.get_decoder_class('Data')
scale_data = obj.encode(value)
obj = ScaleDecoder.get_decoder_class('Data', scale_data)
obj.decode()
self.assertEqual(obj.value, value)