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}")