Inherit IVerifier

packages/contracts/src/interfaces/IVerifier.sol

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.9;
+
+struct EmailProof {
+    string domainName; // Domain name of the sender's email
+    bytes32 publicKeyHash; // Hash of the DKIM public key used in email/proof
+    uint timestamp; // Timestamp of the email
+    string maskedCommand; // Masked command of the email
+    bytes32 emailNullifier; // Nullifier of the email to prevent its reuse.
+    bytes32 accountSalt; // Create2 salt of the account
+    bool isCodeExist; // Check if the account code is exist
+    bytes proof; // ZK Proof of Email
+}
+
+interface IVerifier {
+
+    /**
+     * @notice Verifies the provided email proof.
+     * @param proof The email proof to be verified.
+     * @return bool indicating whether the proof is valid.
+     */    
+    function verifyEmailProof(
+        EmailProof memory proof
+    ) external view returns (bool);
+
+    /**
+     * @notice Returns a constant value representing command bytes.
+     * @return uint256 The constant value of command bytes.
+     */
+    function getCommandBytes() external pure returns (uint256);
+}

packages/contracts/src/utils/JwtVerifier.sol

@@ -5,19 +5,9 @@ import "../interfaces/IJwtGroth16Verifier.sol";
 import {UUPSUpgradeable} from "@openzeppelin/contracts/proxy/utils/UUPSUpgradeable.sol";
 import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
 import { strings } from "solidity-stringutils/src/strings.sol";
+import {IVerifier, EmailProof} from "../interfaces/IVerifier.sol";
 
-struct EmailProof {
-    string domainName; // Domain name of the sender's email
-    bytes32 publicKeyHash; // Hash of the DKIM public key used in email/proof
-    uint timestamp; // Timestamp of the email
-    string maskedCommand; // Masked command of the email
-    bytes32 emailNullifier; // Nullifier of the email to prevent its reuse.
-    bytes32 accountSalt; // Create2 salt of the account
-    bool isCodeExist; // Check if the account code is exist
-    bytes proof; // ZK Proof of Email
-}
-
-contract JwtVerifier is OwnableUpgradeable, UUPSUpgradeable {
+contract JwtVerifier is IVerifier, OwnableUpgradeable, UUPSUpgradeable {
     using strings for *;
 
     IJwtGroth16Verifier groth16Verifier;