diff options
Diffstat (limited to 'python-packages/order_utils')
21 files changed, 378 insertions, 37 deletions
diff --git a/python-packages/order_utils/setup.py b/python-packages/order_utils/setup.py index a76d724aa..1a094cfe1 100644..100755 --- a/python-packages/order_utils/setup.py +++ b/python-packages/order_utils/setup.py @@ -1,13 +1,16 @@ +#!/usr/bin/env python + """setuptools module for order_utils package.""" import subprocess # nosec from shutil import rmtree -from os import path, remove, walk +from os import environ, path, remove, walk +from sys import argv -from distutils.command.clean import clean # type: ignore -from setuptools import setup # type: ignore -import setuptools.command.build_py # type: ignore -from setuptools.command.test import test as TestCommand # type: ignore +from distutils.command.clean import clean +import distutils.command.build_py +from setuptools import setup +from setuptools.command.test import test as TestCommand class TestCommandExtension(TestCommand): @@ -15,13 +18,13 @@ class TestCommandExtension(TestCommand): def run_tests(self): """Invoke pytest.""" - import pytest # type: ignore + import pytest pytest.main() # pylint: disable=too-many-ancestors -class LintCommand(setuptools.command.build_py.build_py): +class LintCommand(distutils.command.build_py.build_py): """Custom setuptools command class for running linters.""" def run(self): @@ -34,7 +37,7 @@ class LintCommand(setuptools.command.build_py.build_py): # docstring style checker: "pydocstyle src test setup.py".split(), # static type checker: - "mypy src setup.py".split(), + "mypy src test setup.py".split(), # security issue checker: "bandit -r src ./setup.py".split(), # general linter: @@ -42,6 +45,21 @@ class LintCommand(setuptools.command.build_py.build_py): # pylint takes relatively long to run, so it runs last, to enable # fast failures. ] + + # tell mypy where to find interface stubs for 3rd party libs + environ["MYPYPATH"] = path.join( + path.dirname(path.realpath(argv[0])), "stubs" + ) + + # HACK(gene): until eth_abi releases + # https://github.com/ethereum/eth-abi/pull/107 , we need to simply + # create an empty file `py.typed` in the eth_abi package directory. + import eth_abi + + eth_abi_dir = path.dirname(path.realpath(eth_abi.__file__)) + with open(path.join(eth_abi_dir, "py.typed"), "a"): + pass + for lint_command in lint_commands: print( "Running lint command `", " ".join(lint_command).strip(), "`" @@ -79,7 +97,7 @@ setup( "test": TestCommandExtension, }, include_package_data=True, - install_requires=["web3"], + install_requires=["eth-abi", "web3"], extras_require={ "dev": [ "bandit", @@ -87,6 +105,7 @@ setup( "coverage", "coveralls", "mypy", + "mypy_extensions", "pycodestyle", "pydocstyle", "pylint", @@ -118,7 +137,7 @@ setup( "Topic :: Software Development :: Libraries", "Topic :: Utilities", ], - zip_safe=False, + zip_safe=False, # required per mypy command_options={ "build_sphinx": { "source_dir": ("setup.py", "src"), diff --git a/python-packages/order_utils/src/conf.py b/python-packages/order_utils/src/conf.py index f3f15967c..e74a29d00 100644 --- a/python-packages/order_utils/src/conf.py +++ b/python-packages/order_utils/src/conf.py @@ -2,6 +2,9 @@ # Reference: http://www.sphinx-doc.org/en/master/config +from typing import List + + # pylint: disable=invalid-name # because these variables are not named in upper case, as globals should be. @@ -29,7 +32,7 @@ master_doc = "index" # The master toctree document. language = None -exclude_patterns = [] # type: ignore +exclude_patterns: List[str] = [] # The name of the Pygments (syntax highlighting) style to use. pygments_style = None diff --git a/python-packages/order_utils/src/index.rst b/python-packages/order_utils/src/index.rst index cbc4c8409..e09abcca2 100644 --- a/python-packages/order_utils/src/index.rst +++ b/python-packages/order_utils/src/index.rst @@ -10,9 +10,12 @@ order_utils.py .. automodule:: zero_ex.order_utils :members: -.. automodule:: zero_ex.order_utils.signature_utils +.. automodule:: zero_ex.order_utils.asset_data_utils :members: +.. autoclass:: zero_ex.order_utils.asset_data_utils.ERC20AssetData + +See source for properties. Sphinx does not easily generate class property docs; pull requests welcome. Indices and tables ================== diff --git a/python-packages/order_utils/src/zero_ex/dev_utils/__init__.py b/python-packages/order_utils/src/zero_ex/dev_utils/__init__.py new file mode 100644 index 000000000..b6a224d2c --- /dev/null +++ b/python-packages/order_utils/src/zero_ex/dev_utils/__init__.py @@ -0,0 +1 @@ +"""Dev utils to be shared across 0x projects and packages.""" diff --git a/python-packages/order_utils/src/zero_ex/dev_utils/abi_utils.py b/python-packages/order_utils/src/zero_ex/dev_utils/abi_utils.py new file mode 100644 index 000000000..71b6128ca --- /dev/null +++ b/python-packages/order_utils/src/zero_ex/dev_utils/abi_utils.py @@ -0,0 +1,102 @@ +"""Ethereum ABI utilities. + +Builds on the eth-abi package, adding some convenience methods like those found +in npmjs.com/package/ethereumjs-abi. Ideally, all of this code should be +pushed upstream into eth-abi. +""" + +import re +from typing import Any, List + +from mypy_extensions import TypedDict + +from eth_abi import encode_abi +from web3 import Web3 + +from .type_assertions import assert_is_string, assert_is_list + + +class MethodSignature(TypedDict, total=False): + """Object interface to an ABI method signature.""" + + method: str + args: List[str] + + +def parse_signature(signature: str) -> MethodSignature: + """Parse a method signature into its constituent parts. + + >>> parse_signature("ERC20Token(address)") + {'method': 'ERC20Token', 'args': ['address']} + """ + assert_is_string(signature, "signature") + + matches = re.match(r"^(\w+)\((.+)\)$", signature) + if matches is None: + raise ValueError(f"Invalid method signature {signature}") + return {"method": matches[1], "args": matches[2].split(",")} + + +def elementary_name(name: str) -> str: + """Convert from short to canonical names; barely implemented. + + Modeled after ethereumjs-abi's ABI.elementaryName(), but only implemented + to support our particular use case and a few other simple ones. + + >>> elementary_name("address") + 'address' + >>> elementary_name("uint") + 'uint256' + """ + assert_is_string(name, "name") + + return { + "int": "int256", + "uint": "uint256", + "fixed": "fixed128x128", + "ufixed": "ufixed128x128", + }.get(name, name) + + +def event_id(name: str, types: List[str]) -> str: + """Return the Keccak-256 hash of the given method. + + >>> event_id("ERC20Token", ["address"]) + '0xf47261b06eedbfce68afd46d0f3c27c60b03faad319eaf33103611cf8f6456ad' + """ + assert_is_string(name, "name") + assert_is_list(types, "types") + + signature = f"{name}({','.join(list(map(elementary_name, types)))})" + return Web3.sha3(text=signature).hex() + + +def method_id(name: str, types: List[str]) -> str: + """Return the 4-byte method identifier. + + >>> method_id("ERC20Token", ["address"]) + '0xf47261b0' + """ + assert_is_string(name, "name") + assert_is_list(types, "types") + + return event_id(name, types)[0:10] + + +def simple_encode(method: str, *args: Any) -> bytes: + # docstring considered all one line by pylint: disable=line-too-long + r"""Encode a method ABI. + + >>> simple_encode("ERC20Token(address)", "0x1dc4c1cefef38a777b15aa20260a54e584b16c48") + b'\xf4ra\xb0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x1d\xc4\xc1\xce\xfe\xf3\x8aw{\x15\xaa &\nT\xe5\x84\xb1lH' + """ # noqa: E501 (line too long) + assert_is_string(method, "method") + + signature: MethodSignature = parse_signature(method) + + return bytes.fromhex( + ( + method_id(signature["method"], signature["args"]) + + encode_abi(signature["args"], args).hex() + )[2:] + ) diff --git a/python-packages/order_utils/src/zero_ex/dev_utils/type_assertions.py b/python-packages/order_utils/src/zero_ex/dev_utils/type_assertions.py new file mode 100644 index 000000000..745d014e6 --- /dev/null +++ b/python-packages/order_utils/src/zero_ex/dev_utils/type_assertions.py @@ -0,0 +1,33 @@ +"""Assertions for runtime type checking of function arguments.""" + +from typing import Any + + +def assert_is_string(value: Any, name: str) -> None: + """If :param value: isn't of type str, raise a TypeError. + + >>> try: assert_is_string(123, 'var') + ... except TypeError as type_error: print(str(type_error)) + ... + expected variable 'var', with value 123, to have type 'str', not 'int' + """ + if not isinstance(value, str): + raise TypeError( + f"expected variable '{name}', with value {str(value)}, to have" + + f" type 'str', not '{type(value).__name__}'" + ) + + +def assert_is_list(value: Any, name: str) -> None: + """If :param value: isn't of type list, raise a TypeError. + + >>> try: assert_is_list(123, 'var') + ... except TypeError as type_error: print(str(type_error)) + ... + expected variable 'var', with value 123, to have type 'list', not 'int' + """ + if not isinstance(value, list): + raise TypeError( + f"expected variable '{name}', with value {str(value)}, to have" + + f" type 'list', not '{type(value).__name__}'" + ) diff --git a/python-packages/order_utils/src/zero_ex/order_utils/asset_data_utils.py b/python-packages/order_utils/src/zero_ex/order_utils/asset_data_utils.py new file mode 100644 index 000000000..451de39af --- /dev/null +++ b/python-packages/order_utils/src/zero_ex/order_utils/asset_data_utils.py @@ -0,0 +1,72 @@ +"""Asset data encoding and decoding utilities.""" + +from mypy_extensions import TypedDict + +import eth_abi + +from zero_ex.dev_utils import abi_utils +from zero_ex.dev_utils.type_assertions import assert_is_string + + +ERC20_ASSET_DATA_BYTE_LENGTH = 36 +SELECTOR_LENGTH = 10 + + +class ERC20AssetData(TypedDict): + """Object interface to ERC20 asset data.""" + + asset_proxy_id: str + token_address: str + + +def encode_erc20_asset_data(token_address: str) -> str: + """Encode an ERC20 token address into an asset data string. + + :param token_address: the ERC20 token's contract address. + :rtype: hex encoded asset data string, usable in the makerAssetData or + takerAssetData fields in a 0x order. + + >>> encode_erc20_asset_data('0x1dc4c1cefef38a777b15aa20260a54e584b16c48') + '0xf47261b00000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c48' + """ + assert_is_string(token_address, "token_address") + + return ( + "0x" + + abi_utils.simple_encode("ERC20Token(address)", token_address).hex() + ) + + +def decode_erc20_asset_data(asset_data: str) -> ERC20AssetData: + # docstring considered all one line by pylint: disable=line-too-long + """Decode an ERC20 assetData hex string. + + :param asset_data: String produced by prior call to encode_erc20_asset_data() + + >>> decode_erc20_asset_data("0xf47261b00000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c48") + {'asset_proxy_id': '0xf47261b0', 'token_address': '0x1dc4c1cefef38a777b15aa20260a54e584b16c48'} + """ # noqa: E501 (line too long) + assert_is_string(asset_data, "asset_data") + + if len(asset_data) < ERC20_ASSET_DATA_BYTE_LENGTH: + raise ValueError( + "Could not decode ERC20 Proxy Data. Expected length of encoded" + + f" data to be at least {str(ERC20_ASSET_DATA_BYTE_LENGTH)}." + + f" Got {str(len(asset_data))}." + ) + + asset_proxy_id: str = asset_data[0:10] + if asset_proxy_id != abi_utils.method_id("ERC20Token", ["address"]): + raise ValueError( + "Could not decode ERC20 Proxy Data. Expected Asset Proxy Id to be" + + f" ERC20 ({abi_utils.method_id('ERC20Token', ['address'])})" + + f" but got {asset_proxy_id}." + ) + + # workaround for https://github.com/PyCQA/pylint/issues/1498 + # pylint: disable=unsubscriptable-object + token_address = eth_abi.decode_abi( + ["address"], bytes.fromhex(asset_data[SELECTOR_LENGTH:]) + )[0] + + return {"asset_proxy_id": asset_proxy_id, "token_address": token_address} diff --git a/python-packages/order_utils/src/zero_ex/order_utils/signature_utils.py b/python-packages/order_utils/src/zero_ex/order_utils/signature_utils.py deleted file mode 100644 index 7f4697106..000000000 --- a/python-packages/order_utils/src/zero_ex/order_utils/signature_utils.py +++ /dev/null @@ -1,13 +0,0 @@ -"""Signature utilities.""" - - -def ec_sign_order_hash(): - """Signs an orderHash. - - Returns its elliptic curve signature and signature type. This method - currently supports TestRPC, Geth, and Parity above and below v1.6.6. - - >>> ec_sign_order_hash() - 'stub return value' - """ - return "stub return value" diff --git a/python-packages/order_utils/stubs/distutils/__init__.pyi b/python-packages/order_utils/stubs/distutils/__init__.pyi new file mode 100644 index 000000000..e69de29bb --- /dev/null +++ b/python-packages/order_utils/stubs/distutils/__init__.pyi diff --git a/python-packages/order_utils/stubs/distutils/command/__init__.pyi b/python-packages/order_utils/stubs/distutils/command/__init__.pyi new file mode 100644 index 000000000..e69de29bb --- /dev/null +++ b/python-packages/order_utils/stubs/distutils/command/__init__.pyi diff --git a/python-packages/order_utils/stubs/distutils/command/clean.pyi b/python-packages/order_utils/stubs/distutils/command/clean.pyi new file mode 100644 index 000000000..46a42ddb1 --- /dev/null +++ b/python-packages/order_utils/stubs/distutils/command/clean.pyi @@ -0,0 +1,7 @@ +from distutils.core import Command + +class clean(Command): + def initialize_options(self: clean) -> None: ... + def finalize_options(self: clean) -> None: ... + def run(self: clean) -> None: ... + ... diff --git a/python-packages/order_utils/stubs/pytest/__init__.pyi b/python-packages/order_utils/stubs/pytest/__init__.pyi new file mode 100644 index 000000000..e69de29bb --- /dev/null +++ b/python-packages/order_utils/stubs/pytest/__init__.pyi diff --git a/python-packages/order_utils/stubs/pytest/raises.pyi b/python-packages/order_utils/stubs/pytest/raises.pyi new file mode 100644 index 000000000..2e3b29f3d --- /dev/null +++ b/python-packages/order_utils/stubs/pytest/raises.pyi @@ -0,0 +1 @@ +def raises(exception: Exception) -> ExceptionInfo: ... diff --git a/python-packages/order_utils/stubs/setuptools/__init__.pyi b/python-packages/order_utils/stubs/setuptools/__init__.pyi new file mode 100644 index 000000000..baa349d70 --- /dev/null +++ b/python-packages/order_utils/stubs/setuptools/__init__.pyi @@ -0,0 +1,6 @@ +from distutils.dist import Distribution +from typing import Any + +def setup(**attrs: Any) -> Distribution: ... + +class Command: ... diff --git a/python-packages/order_utils/stubs/setuptools/command/__init__.pyi b/python-packages/order_utils/stubs/setuptools/command/__init__.pyi new file mode 100644 index 000000000..e69de29bb --- /dev/null +++ b/python-packages/order_utils/stubs/setuptools/command/__init__.pyi diff --git a/python-packages/order_utils/stubs/setuptools/command/test.pyi b/python-packages/order_utils/stubs/setuptools/command/test.pyi new file mode 100644 index 000000000..c5ec770ad --- /dev/null +++ b/python-packages/order_utils/stubs/setuptools/command/test.pyi @@ -0,0 +1,3 @@ +from setuptools import Command + +class test(Command): ... diff --git a/python-packages/order_utils/stubs/web3/__init__.pyi b/python-packages/order_utils/stubs/web3/__init__.pyi new file mode 100644 index 000000000..c6f357009 --- /dev/null +++ b/python-packages/order_utils/stubs/web3/__init__.pyi @@ -0,0 +1,10 @@ +from typing import Optional, Union + +class Web3: + @staticmethod + def sha3( + primitive: Optional[Union[bytes, int, None]] = None, + text: Optional[str] = None, + hexstr: Optional[str] = None + ) -> bytes: ... + ... diff --git a/python-packages/order_utils/test/test_abi_utils.py b/python-packages/order_utils/test/test_abi_utils.py new file mode 100644 index 000000000..49a2a4f20 --- /dev/null +++ b/python-packages/order_utils/test/test_abi_utils.py @@ -0,0 +1,53 @@ +"""Tests of 0x.abi_utils.""" + +import pytest + +from zero_ex.dev_utils.abi_utils import ( + elementary_name, + event_id, + method_id, + parse_signature, + simple_encode, +) + + +def test_parse_signature_type_error(): + """Test that passing in wrong types raises TypeError.""" + with pytest.raises(TypeError): + parse_signature(123) + + +def test_parse_signature_bad_input(): + """Test that passing a non-signature string raises a ValueError.""" + with pytest.raises(ValueError): + parse_signature("a string that's not even close to a signature") + + +def test_elementary_name_type_error(): + """Test that passing in wrong types raises TypeError.""" + with pytest.raises(TypeError): + elementary_name(123) + + +def test_event_id_type_error(): + """Test that passing in wrong types raises TypeError.""" + with pytest.raises(TypeError): + event_id(123, []) + + with pytest.raises(TypeError): + event_id("valid string", 123) + + +def test_method_id_type_error(): + """Test that passing in wrong types raises TypeError.""" + with pytest.raises(TypeError): + method_id(123, []) + + with pytest.raises(TypeError): + method_id("ERC20Token", 123) + + +def test_simple_encode_type_error(): + """Test that passing in wrong types raises TypeError.""" + with pytest.raises(TypeError): + simple_encode(123) diff --git a/python-packages/order_utils/test/test_asset_data_utils.py b/python-packages/order_utils/test/test_asset_data_utils.py new file mode 100644 index 000000000..eeada5873 --- /dev/null +++ b/python-packages/order_utils/test/test_asset_data_utils.py @@ -0,0 +1,35 @@ +"""Tests of 0x.order_utils.asset_data_utils.""" + +import pytest + +from zero_ex.order_utils.asset_data_utils import ( + encode_erc20_asset_data, + decode_erc20_asset_data, + ERC20_ASSET_DATA_BYTE_LENGTH, +) + + +def test_encode_erc20_asset_data_type_error(): + """Test that passing in a non-string raises a TypeError.""" + with pytest.raises(TypeError): + encode_erc20_asset_data(123) + + +def test_decode_erc20_asset_data_type_error(): + """Test that passing in a non-string raises a TypeError.""" + with pytest.raises(TypeError): + decode_erc20_asset_data(123) + + +def test_decode_erc20_asset_data_too_short(): + """Test that passing an insufficiently long string raises a ValueError.""" + with pytest.raises(ValueError): + decode_erc20_asset_data(" " * (ERC20_ASSET_DATA_BYTE_LENGTH - 1)) + + +def test_decode_erc20_asset_data_invalid_proxy_id(): + """Test that passing data with an invalid proxy ID raises a ValueError.""" + with pytest.raises(ValueError): + decode_erc20_asset_data( + "0xffffffff" + (" " * ERC20_ASSET_DATA_BYTE_LENGTH) + ) diff --git a/python-packages/order_utils/test/test_doctest.py b/python-packages/order_utils/test/test_doctest.py index a0e61f84a..ba5da5418 100644 --- a/python-packages/order_utils/test/test_doctest.py +++ b/python-packages/order_utils/test/test_doctest.py @@ -1,10 +1,24 @@ """Exercise doctests for order_utils module.""" from doctest import testmod -from zero_ex.order_utils import signature_utils +from zero_ex.dev_utils import abi_utils, type_assertions +from zero_ex.order_utils import asset_data_utils -def test_doctest(): - """Invoke doctest on the module.""" - (failure_count, _) = testmod(signature_utils) + +def test_doctest_asset_data_utils(): + """Invoke doctest on the asset_data_utils module.""" + (failure_count, _) = testmod(asset_data_utils) + assert failure_count == 0 + + +def test_doctest_abi_utils(): + """Invoke doctest on the abi_utils module.""" + (failure_count, _) = testmod(abi_utils) + assert failure_count == 0 + + +def test_doctest_type_assertions(): + """Invoke doctest on the type_assertions module.""" + (failure_count, _) = testmod(type_assertions) assert failure_count == 0 diff --git a/python-packages/order_utils/test/test_signature_utils.py b/python-packages/order_utils/test/test_signature_utils.py deleted file mode 100644 index 7e830f9f8..000000000 --- a/python-packages/order_utils/test/test_signature_utils.py +++ /dev/null @@ -1,8 +0,0 @@ -"""Tests of 0x.order_utils.signature_utils.*.""" - -from zero_ex.order_utils.signature_utils import ec_sign_order_hash - - -def test_ec_sign_order_hash(): - """Test the signing of order hashes.""" - assert ec_sign_order_hash() == "stub return value" |