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Remove utf-8 string decoding from normalizers #974

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merged 3 commits into from
Aug 15, 2018
Merged

Remove utf-8 string decoding from normalizers #974

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2041b5d
Support eth-abi >=2
dylanjw Jul 30, 2018
ff4af4a
Add test for undecodable strings + eth-abi.__version__ >= 2
dylanjw Jul 30, 2018
2cc941e
Bump eth-abi version
dylanjw Aug 2, 2018
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7 changes: 7 additions & 0 deletions tests/core/contracts/test_contract_call_interface.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,9 +2,13 @@
Decimal,
getcontext,
)
from distutils.version import (
LooseVersion,
)
import json
import pytest

import eth_abi
from hexbytes import (
HexBytes,
)
Expand Down Expand Up @@ -184,6 +188,9 @@ def test_call_get_string_value(string_contract, call):
assert result == "Caqalai"


@pytest.mark.skipif(
LooseVersion(eth_abi.__version__) >= LooseVersion("2"),
reason="eth-abi >=2 does utf-8 string decoding")
def test_call_read_string_variable(string_contract, call):
result = call(contract=string_contract,
contract_function='constValue')
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Maybe add a second test that shows what happens on an ABI decoding error. We should probably do something like capture the eth-abi error and re-raise a generic ValueError.

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It raises a 'BadFunctionCallOutput' error

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11 changes: 9 additions & 2 deletions web3/utils/normalizers.py
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Original file line number Diff line number Diff line change
@@ -1,8 +1,12 @@

import codecs
from distutils.version import (
LooseVersion,
)
import functools
import json

import eth_abi
from eth_abi.abi import (
process_type,
)
Expand Down Expand Up @@ -140,11 +144,14 @@ def abi_ens_resolver(w3, abi_type, val):


BASE_RETURN_NORMALIZERS = [
addresses_checksummed,
decode_abi_strings,
addresses_checksummed
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style nitpick leave the trailing comma.

]


if LooseVersion(eth_abi.__version__) < LooseVersion("2"):
BASE_RETURN_NORMALIZERS.append(decode_abi_strings)


#
# Property Normalizers
#
Expand Down