update getCalldata

Author: anajuliabit

src/proposals/MultisigProposal.sol

@@ -20,20 +20,24 @@ abstract contract MultisigProposal is Proposal {
     }
 
     /// @notice return calldata, log if debug is set to true
-    function getCalldata() public view virtual override returns (bytes memory data) {
-        /// get proposal actions
+    function getCalldata() public view override returns (bytes memory) {
         (address[] memory targets, uint256[] memory values, bytes[] memory arguments) = getProposalActions();
 
-        /// create calls array with targets and arguments
-        Call3Value[] memory calls = new Call3Value[](targets.length);
+        require(targets.length == values.length && values.length == arguments.length, "Array lengths mismatch");
 
-        for (uint256 i; i < calls.length; i++) {
-            require(targets[i] != address(0), "Invalid target for multisig");
-            calls[i] = Call3Value({target: targets[i], allowFailure: false, value: values[i], callData: arguments[i]});
+        bytes memory encodedTxs;
+
+        for (uint256 i = 0; i < targets.length; i++) {
+            uint8 operation = 0;
+            address to = targets[i];
+            uint256 value = values[i];
+            bytes memory data = arguments[i];
+
+            encodedTxs = bytes.concat(encodedTxs, abi.encodePacked(operation, to, value, uint256(data.length), data));
         }
 
-        /// generate calldata
-        data = abi.encodeWithSignature("aggregate3Value((address,bool,uint256,bytes)[])", calls);
+        // The final calldata to send to the MultiSend contract
+        return abi.encodeWithSignature("multiSend(bytes)", encodedTxs);
     }
 
     /// @notice Check if there are any on-chain proposal that matches the