From c36f1eb62bcc049d80066f985f5ae712efd39e53 Mon Sep 17 00:00:00 2001
From: Mikhail Melnik <by.zumzoom@gmail.com>
Date: Tue, 19 Mar 2024 21:17:06 +0400
Subject: [PATCH] simplify mock

---
 contracts/tests/mocks/USDCLikePermitMock.sol | 29 +-------------------
 1 file changed, 1 insertion(+), 28 deletions(-)

diff --git a/contracts/tests/mocks/USDCLikePermitMock.sol b/contracts/tests/mocks/USDCLikePermitMock.sol
index 7015a57..bbfe9c5 100644
--- a/contracts/tests/mocks/USDCLikePermitMock.sol
+++ b/contracts/tests/mocks/USDCLikePermitMock.sol
@@ -42,8 +42,7 @@ contract USDCLikePermitMock is ERC20Permit {
             revert PermitExpired();
         }
 
-        bytes32 typedDataHash = _toTypedDataHash(
-            _domainSeparatorV4(),
+        bytes32 typedDataHash = _hashTypedDataV4(
             keccak256(
                 abi.encode(
                     PERMIT_TYPEHASH,
@@ -61,32 +60,6 @@ contract USDCLikePermitMock is ERC20Permit {
         _approve(owner, spender, value);
     }
 
-    /**
-     * @dev Returns the keccak256 digest of an EIP-712 typed data (EIP-191 version `0x01`).
-     * Adapted from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/21bb89ef5bfc789b9333eb05e3ba2b7b284ac77c/contracts/utils/cryptography/MessageHashUtils.sol
-     *
-     * The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with
-     * `\x19\x01` and hashing the result. It corresponds to the hash signed by the
-     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712.
-     *
-     * @param domainSeparator    Domain separator
-     * @param structHash         Hashed EIP-712 data struct
-     * @return digest            The keccak256 digest of an EIP-712 typed data
-     */
-    function _toTypedDataHash(bytes32 domainSeparator, bytes32 structHash)
-        internal
-        pure
-        returns (bytes32 digest)
-    {
-        assembly { // solhint-disable-line no-inline-assembly
-            let ptr := mload(0x40)
-            mstore(ptr, "\x19\x01")
-            mstore(add(ptr, 0x02), domainSeparator)
-            mstore(add(ptr, 0x22), structHash)
-            digest := keccak256(ptr, 0x42)
-        }
-    }
-
     function _isValidERC1271SignatureNow(
         address signer,
         bytes32 digest,