MetaTransactionData changes

contracts/zero-ex/contracts/src/features/interfaces/IMetaTransactionsFeature.sol

@@ -44,6 +44,30 @@ interface IMetaTransactionsFeature {
         uint256 feeAmount;
     }
 
+    struct MetaTransactionFeeData {
+        // ERC20 fee recipient
+        address recipient;
+        // ERC20 fee amount
+        uint256 amount;
+    }
+
+    struct MetaTransactionDataV2 {
+        // Signer of meta-transaction. On whose behalf to execute the MTX.
+        address payable signer;
+        // Required sender, or NULL for anyone.
+        address sender;
+        // MTX is invalid after this time.
+        uint256 expirationTimeSeconds;
+        // Nonce to make this MTX unique.
+        uint256 salt;
+        // Encoded call data to a function on the exchange proxy.
+        bytes callData;
+        // ERC20 fee `signer` pays `sender`.
+        IERC20TokenV06 feeToken;
+        // ERC20 fees.
+        MetaTransactionFeeData[] fees;
+    }
+
     /// @dev Emitted whenever a meta-transaction is executed via
     ///      `executeMetaTransaction()` or `executeMetaTransactions()`.
     /// @param hash The meta-transaction hash.