RAHHH

backend/lib/python3.12/site-packages/autobahn/xbr/_eip712_base.py

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+###############################################################################
+#
+# The MIT License (MIT)
+#
+# Copyright (c) typedef int GmbH
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+###############################################################################
+
+from typing import Dict, Any
+from binascii import a2b_hex
+from py_eth_sig_utils import signing
+
+_EIP712_SIG_LEN = 32 + 32 + 1
+
+
+def _hash(data) -> bytes:
+    """
+    keccak256(abi.encode(
+            EIP712_MEMBER_REGISTER_TYPEHASH,
+            obj.chainId,
+            obj.verifyingContract,
+            obj.member,
+            obj.registered,
+            keccak256(bytes(obj.eula)),
+            keccak256(bytes(obj.profile))
+        ));
+
+    :param data:
+    :return:
+    """
+
+
+def sign(eth_privkey: bytes, data: Dict[str, Any]) -> bytes:
+    """
+    Sign the given data using the given Ethereum private key.
+
+    :param eth_privkey: Signing key.
+    :param data: Data to sign.
+    :return: Signature.
+    """
+    # internally, this is using py_eth_sig_utils.eip712.encode_typed_data
+    _args = signing.sign_typed_data(data, eth_privkey)
+
+    # serialize structured signature (v, r, s) into bytes
+    signature = signing.v_r_s_to_signature(*_args)
+
+    # be paranoid about what to expect
+    assert type(signature) == bytes and len(signature) == _EIP712_SIG_LEN
+
+    return signature
+
+
+def recover(data: Dict[str, Any], signature: bytes) -> bytes:
+    """
+    Recover the Ethereum address of the signer, given the data and signature.
+
+    :param data: Signed data.
+    :param signature: Signature.
+    :return: Signing address.
+    """
+    assert type(signature) == bytes and len(signature) == _EIP712_SIG_LEN
+    signer_address = signing.recover_typed_data(data, *signing.signature_to_v_r_s(signature))
+
+    return a2b_hex(signer_address[2:])
+
+
+def is_address(provided: Any) -> bool:
+    """
+    Check if the value is a proper Ethereum address.
+
+    :param provided: The value to check.
+    :return: True iff the value is of correct type.
+    """
+    return type(provided) == bytes and len(provided) == 20
+
+
+def is_bytes16(provided: Any) -> bool:
+    """
+    Check if the value is a proper (binary) UUID.
+
+    :param provided: The value to check.
+    :return: True iff the value is of correct type.
+    """
+    return type(provided) == bytes and len(provided) == 16
+
+
+def is_bytes32(provided: Any) -> bool:
+    """
+    Check if the value is of type bytes and length 32.
+
+    :param provided: The value to check.
+    :return: True iff the value is of correct type.
+    """
+    return type(provided) == bytes and len(provided) == 32
+
+
+def is_signature(provided: Any) -> bool:
+    """
+    Check if the value is a proper Ethereum signature.
+
+    :param provided: The value to check.
+    :return: True iff the value is of correct type.
+    """
+    return type(provided) == bytes and len(provided) == _EIP712_SIG_LEN
+
+
+def is_eth_privkey(provided: Any) -> bool:
+    """
+    Check if the value is a proper Ethereum private key (seed).
+
+    :param provided: The value to check.
+    :return: True iff the value is of correct type.
+    """
+    return type(provided) == bytes and len(provided) == 32
+
+
+def is_cs_pubkey(provided: Any) -> bool:
+    """
+    Check if the value is a proper WAMP-cryptosign public key.
+
+    :param provided: The value to check.
+    :return: True iff the value is of correct type.
+    """
+    return type(provided) == bytes and len(provided) == 32
+
+
+def is_block_number(provided: Any) -> bool:
+    """
+    Check if the value is a proper Ethereum block number.
+
+    :param provided: The value to check.
+    :return: True iff the value is of correct type.
+    """
+    return type(provided) == int
+
+
+def is_chain_id(provided: Any) -> bool:
+    """
+    Check if the value is a proper Ethereum chain ID.
+
+    :param provided: The value to check.
+    :return: True iff the value is of correct type.
+    """
+    # here is a list of public networks: https://chainid.network/
+    # note: we allow any positive integer to account for private networks
+    return type(provided) == int and provided > 0