fix(c4-6-13): use calldata instead of memory for function parameters

Signed-off-by: Tomás Migone <[email protected]>

Author: tmigone

contracts/gateway/L1GraphTokenGateway.sol

@@ -285,7 +285,7 @@ contract L1GraphTokenGateway is Initializable, GraphTokenGateway, L1ArbitrumMess
      * @return Base ether value required to keep retryable ticket alive
      * @return Additional data sent to L2
      */
-    function parseOutboundData(bytes memory _data)
+    function parseOutboundData(bytes calldata _data)
         private
         view
         returns (

contracts/l2/gateway/L2GraphTokenGateway.sol

@@ -283,7 +283,7 @@ contract L2GraphTokenGateway is GraphTokenGateway, L2ArbitrumMessenger, Reentran
      * @return Sender of the tx
      * @return Any other data sent to L1
      */
-    function parseOutboundData(bytes memory _data) private view returns (address, bytes memory) {
+    function parseOutboundData(bytes calldata _data) private view returns (address, bytes memory) {
         address from;
         bytes memory extraData;
         if (msg.sender == l2Router) {