_______________________________ test_historic_view_token_balance _______________________________
web3 = <web3.main.Web3 object at 0x7f2029a5b860>
address = '0xFBCe7c17608eBd5640313eCf4d2ff09B6726bAB9', normalizers = ()
function_identifier = 'balanceOf'
transaction = {'to': '0xFBCe7c17608eBd5640313eCf4d2ff09B6726bAB9'}, block_id = 5876634
contract_abi = [{'constant': True, 'inputs': [], 'name': 'totalSupply', 'outputs': [{'name': '', 'type': 'uint256'}], ...}, {'constan...s'}, {'name': 'guy', 'type': 'address'}], 'name': 'allowance', 'outputs': [{'name': '', 'type': 'uint256'}], ...}, ...]
fn_abi = {'constant': True, 'inputs': [{'name': 'src', 'type': 'address'}], 'name': 'balanceOf', 'outputs': [{'name': '', 'type': 'uint256'}], ...}
args = ('0xaAF3FFEE9d4C976aA8d0CB1bb84c3C90ee6E9118',), kwargs = {}
call_transaction = {'data': '0x70a08231000000000000000000000000aaf3ffee9d4c976aa8d0cb1bb84c3c90ee6e9118', 'to': '0xFBCe7c17608eBd5640313eCf4d2ff09B6726bAB9'}
return_data = HexBytes('0x'), output_types = ['uint256'], is_missing_code_error = False
msg = "Could not decode contract function call balanceOf return data b'' for output_types ['uint256']"
def call_contract_function(
web3,
address,
normalizers,
function_identifier,
transaction,
block_id=None,
contract_abi=None,
fn_abi=None,
*args,
**kwargs):
"""
Helper function for interacting with a contract function using the
`eth_call` API.
"""
call_transaction = prepare_transaction(
address,
web3,
fn_identifier=function_identifier,
contract_abi=contract_abi,
fn_abi=fn_abi,
transaction=transaction,
fn_args=args,
fn_kwargs=kwargs,
)
if block_id is None:
return_data = web3.eth.call(call_transaction)
else:
return_data = web3.eth.call(call_transaction, block_identifier=block_id)
if fn_abi is None:
fn_abi = find_matching_fn_abi(contract_abi, function_identifier, args, kwargs)
output_types = get_abi_output_types(fn_abi)
try:
> output_data = decode_abi(output_types, return_data)
../../../.pyenv/versions/3.6.5/envs/general/lib/python3.6/site-packages/web3/contract.py:1363:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
types = ['uint256'], data = HexBytes('0x')
def decode_abi(types, data):
if not is_bytes(data):
raise TypeError("The `data` value must be of bytes type. Got {0}".format(type(data)))
decoders = [
registry.get_decoder(type_str)
for type_str in types
]
decoder = TupleDecoder(decoders=decoders)
stream = ContextFramesBytesIO(data)
> return decoder(stream)
../../../.pyenv/versions/3.6.5/envs/general/lib/python3.6/site-packages/eth_abi/abi.py:96:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <eth_abi.decoding.TupleDecoder object at 0x7f2033b002b0>
stream = <eth_abi.decoding.ContextFramesBytesIO object at 0x7f2029cb2150>
def __call__(self, stream):
> return self.decode(stream)
../../../.pyenv/versions/3.6.5/envs/general/lib/python3.6/site-packages/eth_abi/decoding.py:118:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
args = (<eth_abi.decoding.TupleDecoder object at 0x7f2033b002b0>, <eth_abi.decoding.ContextFramesBytesIO object at 0x7f2029cb2150>)
kwargs = {}
@functools.wraps(fn)
def inner(*args, **kwargs):
> return callback(fn(*args, **kwargs))
../../../.pyenv/versions/3.6.5/envs/general/lib/python3.6/site-packages/eth_utils/functional.py:22:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <eth_abi.decoding.TupleDecoder object at 0x7f2033b002b0>
stream = <eth_abi.decoding.ContextFramesBytesIO object at 0x7f2029cb2150>
@to_tuple
def decode(self, stream):
for decoder in self.decoders:
> yield decoder(stream)
../../../.pyenv/versions/3.6.5/envs/general/lib/python3.6/site-packages/eth_abi/decoding.py:164:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <eth_abi.decoding.UnsignedIntegerDecoder object at 0x7f2029a73518>
stream = <eth_abi.decoding.ContextFramesBytesIO object at 0x7f2029cb2150>
def __call__(self, stream):
> return self.decode(stream)
../../../.pyenv/versions/3.6.5/envs/general/lib/python3.6/site-packages/eth_abi/decoding.py:118:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <eth_abi.decoding.UnsignedIntegerDecoder object at 0x7f2029a73518>
stream = <eth_abi.decoding.ContextFramesBytesIO object at 0x7f2029cb2150>
def decode(self, stream):
> raw_data = self.read_data_from_stream(stream)
../../../.pyenv/versions/3.6.5/envs/general/lib/python3.6/site-packages/eth_abi/decoding.py:186:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <eth_abi.decoding.UnsignedIntegerDecoder object at 0x7f2029a73518>
stream = <eth_abi.decoding.ContextFramesBytesIO object at 0x7f2029cb2150>
def read_data_from_stream(self, stream):
data = stream.read(self.data_byte_size)
if len(data) != self.data_byte_size:
raise InsufficientDataBytes(
"Tried to read {0} bytes. Only got {1} bytes".format(
self.data_byte_size,
> len(data),
)
)
E eth_abi.exceptions.InsufficientDataBytes: Tried to read 32 bytes. Only got 0 bytes
../../../.pyenv/versions/3.6.5/envs/general/lib/python3.6/site-packages/eth_abi/decoding.py:279: InsufficientDataBytes
The above exception was the direct cause of the following exception:
def test_historic_view_token_balance():
assert ETH_CHAIN == 'kovan', 'This test was designed for Kovan chain.'
address = '0xaAF3FFEE9d4C976aA8d0CB1bb84c3C90ee6E9118'
> assert view_token_balance(address, block_num=5876634) == 0
tests/core/test_eth.py:36:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
src/core/eth.py:101: in view_token_balance
return instance.functions.balanceOf(address).call(block_identifier=block_num)
../../../.pyenv/versions/3.6.5/envs/general/lib/python3.6/site-packages/web3/contract.py:1106: in call
**self.kwargs
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
web3 = <web3.main.Web3 object at 0x7f2029a5b860>
address = '0xFBCe7c17608eBd5640313eCf4d2ff09B6726bAB9', normalizers = ()
function_identifier = 'balanceOf'
transaction = {'to': '0xFBCe7c17608eBd5640313eCf4d2ff09B6726bAB9'}, block_id = 5876634
contract_abi = [{'constant': True, 'inputs': [], 'name': 'totalSupply', 'outputs': [{'name': '', 'type': 'uint256'}], ...}, {'constan...s'}, {'name': 'guy', 'type': 'address'}], 'name': 'allowance', 'outputs': [{'name': '', 'type': 'uint256'}], ...}, ...]
fn_abi = {'constant': True, 'inputs': [{'name': 'src', 'type': 'address'}], 'name': 'balanceOf', 'outputs': [{'name': '', 'type': 'uint256'}], ...}
args = ('0xaAF3FFEE9d4C976aA8d0CB1bb84c3C90ee6E9118',), kwargs = {}
call_transaction = {'data': '0x70a08231000000000000000000000000aaf3ffee9d4c976aa8d0cb1bb84c3c90ee6e9118', 'to': '0xFBCe7c17608eBd5640313eCf4d2ff09B6726bAB9'}
return_data = HexBytes('0x'), output_types = ['uint256'], is_missing_code_error = False
msg = "Could not decode contract function call balanceOf return data b'' for output_types ['uint256']"
def call_contract_function(
web3,
address,
normalizers,
function_identifier,
transaction,
block_id=None,
contract_abi=None,
fn_abi=None,
*args,
**kwargs):
"""
Helper function for interacting with a contract function using the
`eth_call` API.
"""
call_transaction = prepare_transaction(
address,
web3,
fn_identifier=function_identifier,
contract_abi=contract_abi,
fn_abi=fn_abi,
transaction=transaction,
fn_args=args,
fn_kwargs=kwargs,
)
if block_id is None:
return_data = web3.eth.call(call_transaction)
else:
return_data = web3.eth.call(call_transaction, block_identifier=block_id)
if fn_abi is None:
fn_abi = find_matching_fn_abi(contract_abi, function_identifier, args, kwargs)
output_types = get_abi_output_types(fn_abi)
try:
output_data = decode_abi(output_types, return_data)
except DecodingError as e:
# Provide a more helpful error message than the one provided by
# eth-abi-utils
is_missing_code_error = (
return_data in ACCEPTABLE_EMPTY_STRINGS and
web3.eth.getCode(address) in ACCEPTABLE_EMPTY_STRINGS
)
if is_missing_code_error:
msg = (
"Could not transact with/call contract function, is contract "
"deployed correctly and chain synced?"
)
else:
msg = (
"Could not decode contract function call {} return data {} for "
"output_types {}".format(
function_identifier,
return_data,
output_types
)
)
> raise BadFunctionCallOutput(msg) from e
E web3.exceptions.BadFunctionCallOutput: Could not decode contract function call balanceOf return data b'' for output_types ['uint256']
../../../.pyenv/versions/3.6.5/envs/general/lib/python3.6/site-packages/web3/contract.py:1385: BadFunctionCallOutput
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