diff options
Diffstat (limited to 'python-packages/order_utils/src/zero_ex/order_utils/signature_utils.py')
-rw-r--r-- | python-packages/order_utils/src/zero_ex/order_utils/signature_utils.py | 88 |
1 files changed, 0 insertions, 88 deletions
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 12525ba88..000000000 --- a/python-packages/order_utils/src/zero_ex/order_utils/signature_utils.py +++ /dev/null @@ -1,88 +0,0 @@ -"""Signature utilities.""" - -from typing import Dict, Tuple -import json -from pkg_resources import resource_string - -from eth_utils import is_address, to_checksum_address -from web3 import Web3 -import web3.exceptions -from web3.utils import datatypes - -from zero_ex.dev_utils.type_assertions import assert_is_hex_string - - -# prefer `black` formatting. pylint: disable=C0330 -EXCHANGE_ABI = json.loads( - resource_string("zero_ex.contract_artifacts", "artifacts/Exchange.json") -)["compilerOutput"]["abi"] - -network_to_exchange_addr: Dict[str, str] = { - "1": "0x4f833a24e1f95d70f028921e27040ca56e09ab0b", - "3": "0x4530c0483a1633c7a1c97d2c53721caff2caaaaf", - "42": "0x35dd2932454449b14cee11a94d3674a936d5d7b2", - "50": "0x48bacb9266a570d521063ef5dd96e61686dbe788", -} - - -# prefer `black` formatting. pylint: disable=C0330 -def is_valid_signature( - provider: Web3.HTTPProvider, data: str, signature: str, signer_address: str -) -> Tuple[bool, str]: - # docstring considered all one line by pylint: disable=line-too-long - """Check the validity of the supplied signature. - - Check if the supplied ``signature`` corresponds to signing ``data`` with - the private key corresponding to ``signer_address``. - - :param provider: A Web3 provider able to access the 0x Exchange contract. - :param data: The hex encoded data signed by the supplied signature. - :param signature: The hex encoded signature. - :param signer_address: The hex encoded address that signed the data to - produce the supplied signature. - :rtype: Boolean indicating whether the given signature is valid. - - >>> is_valid_signature( - ... Web3.HTTPProvider("http://127.0.0.1:8545"), - ... '0x6927e990021d23b1eb7b8789f6a6feaf98fe104bb0cf8259421b79f9a34222b0', - ... '0x1B61a3ed31b43c8780e905a260a35faefcc527be7516aa11c0256729b5b351bc3340349190569279751135161d22529dc25add4f6069af05be04cacbda2ace225403', - ... '0x5409ed021d9299bf6814279a6a1411a7e866a631', - ... ) - (True, '') - """ # noqa: E501 (line too long) - # TODO: make this provider check more flexible. pylint: disable=fixme - # https://app.asana.com/0/684263176955174/901300863045491/f - if not isinstance(provider, Web3.HTTPProvider): - raise TypeError("provider is not a Web3.HTTPProvider") - assert_is_hex_string(data, "data") - assert_is_hex_string(signature, "signature") - assert_is_hex_string(signer_address, "signer_address") - if not is_address(signer_address): - raise ValueError("signer_address is not a valid address") - - web3_instance = Web3(provider) - # false positive from pylint: disable=no-member - network_id = web3_instance.net.version - contract_address = network_to_exchange_addr[network_id] - # false positive from pylint: disable=no-member - contract: datatypes.Contract = web3_instance.eth.contract( - address=to_checksum_address(contract_address), abi=EXCHANGE_ABI - ) - try: - return ( - contract.call().isValidSignature( - data, to_checksum_address(signer_address), signature - ), - "", - ) - except web3.exceptions.BadFunctionCallOutput as exception: - known_revert_reasons = [ - "LENGTH_GREATER_THAN_0_REQUIRED", - "SIGNATURE_UNSUPPORTED", - "LENGTH_0_REQUIRED", - "LENGTH_65_REQUIRED", - ] - for known_revert_reason in known_revert_reasons: - if known_revert_reason in str(exception): - return (False, known_revert_reason) - return (False, f"Unknown: {exception}") |