modify BridgeAggregationHookMetadata to only include Axelar payment data

Author: NicholasDotSol

solidity/contracts/hooks/libs/BridgeAggregationHookMetadata.sol

@@ -4,20 +4,16 @@ pragma solidity >=0.8.0;
 /**
  * Format of metadata:
  *
- * [0:2] variant
- * [2:34] Axelar Payment
- * [34:66] Wormhole Payment
- * [66:] additional metadata
+ * [0:32] variant
+ * [32:] additional metadata
  */
 library BridgeAggregationHookMetadata {
     struct Metadata {
         uint256 AxelarPayment;
-        uint256 WormholePayment;
     }
 
     uint8 private constant AXELAR_PAYMENT_OFFSET = 0;
-    uint8 private constant WORMHOLE_PAYMENT_OFFSET = 32;
-    uint8 private constant MIN_METADATA_LENGTH = 64;
+    uint8 private constant MIN_METADATA_LENGTH = 32;
 
     /**
      * @notice Returns the required payment for Axelar bridging.
@@ -36,24 +32,6 @@ library BridgeAggregationHookMetadata {
             );
     }
 
-    /**
-     * @notice Returns the required payment for Wormhole bridging.
-     * @param _metadata ABI encoded standard hook metadata.
-     * @return uint256 Payment amount.
-     */
-    function wormholeGasPayment(
-        bytes calldata _metadata
-    ) internal pure returns (uint256) {
-        if (_metadata.length < WORMHOLE_PAYMENT_OFFSET + 32) return 0;
-        return
-            uint256(
-                bytes32(
-                    _metadata[WORMHOLE_PAYMENT_OFFSET:WORMHOLE_PAYMENT_OFFSET +
-                        32]
-                )
-            );
-    }
-
     /**
      * @notice Returs any additional metadata.
      * @param _metadata ABI encoded standard hook metadata.
@@ -69,16 +47,13 @@ library BridgeAggregationHookMetadata {
     /**
      * @notice Formats the specified Axelar and Wormhole payments.
      * @param _axelarPayment msg.value for the message.
-     * @param _wormholePayment Gas limit for the message.
      * @param _customMetadata Additional metadata to include.
      * @return ABI encoded standard hook metadata.
      */
     function formatMetadata(
         uint256 _axelarPayment,
-        uint256 _wormholePayment,
         bytes memory _customMetadata
     ) internal pure returns (bytes memory) {
-        return
-            abi.encodePacked(_axelarPayment, _wormholePayment, _customMetadata);
+        return abi.encodePacked(_axelarPayment, _customMetadata);
     }
 }

solidity/test/hooks/AxelarHook.t.sol

@@ -31,7 +31,6 @@ contract AxelarHookTest is Test {
     string destionationContract = "neutronContract";
     address axelarGateway = address(0);
     address axelarGasReceiver = address(0);
-    bytes gmp_call_code = abi.encodePacked(uint8(1));
     error BadQuote(uint256 balance, uint256 required);
 
     function setUp() public {
@@ -42,8 +41,7 @@ contract AxelarHookTest is Test {
             destinationChain,
             destionationContract,
             axelarGateway,
-            axelarGasReceiver,
-            gmp_call_code
+            axelarGasReceiver
         );
         testMessage = _encodeTestMessage();
     }
@@ -66,7 +64,7 @@ contract AxelarHookTest is Test {
         vm.expectRevert("No Axelar Payment Received");
         uint256 expectedQuote = 0;
         bytes memory justRightCustomMetadata = BridgeAggregationHookMetadata
-            .formatMetadata(expectedQuote, 0, abi.encodePacked());
+            .formatMetadata(expectedQuote, abi.encodePacked());
         bytes memory testMetadata = StandardHookMetadata.formatMetadata(
             100,
             100,
@@ -80,7 +78,7 @@ contract AxelarHookTest is Test {
     function test_quoteDispatch_ReturnsSmallQuote() public {
         uint256 expectedQuote = 1;
         bytes memory justRightCustomMetadata = BridgeAggregationHookMetadata
-            .formatMetadata(expectedQuote, 0, abi.encodePacked());
+            .formatMetadata(expectedQuote, abi.encodePacked());
         bytes memory testMetadata = StandardHookMetadata.formatMetadata(
             100,
             100,
@@ -96,7 +94,7 @@ contract AxelarHookTest is Test {
         // type(uint256).max = 115792089237316195423570985008687907853269984665640564039457584007913129639935. that's a big quote
         uint256 expectedQuote = type(uint256).max;
         bytes memory justRightCustomMetadata = BridgeAggregationHookMetadata
-            .formatMetadata(expectedQuote, 0, abi.encodePacked());
+            .formatMetadata(expectedQuote, abi.encodePacked());
         bytes memory testMetadata = StandardHookMetadata.formatMetadata(
             100,
             100,