fix: added thaw request type to thaw request fulfilled event (TRST-R15)

Author: Maikol

packages/horizon/contracts/interfaces/internal/IHorizonStakingMain.sol

@@ -3,6 +3,7 @@
 pragma solidity 0.8.27;
 
 import { IGraphPayments } from "../../interfaces/IGraphPayments.sol";
+import { IHorizonStakingTypes } from "./IHorizonStakingTypes.sol";
 
 /**
  * @title Inferface for the {HorizonStaking} contract.
@@ -280,13 +281,15 @@ interface IHorizonStakingMain {
      * @param owner The address of the owner of the thaw requests
      * @param thawRequestsFulfilled The number of thaw requests fulfilled
      * @param tokens The total amount of tokens being released
+     * @param requestType The type of thaw request
      */
     event ThawRequestsFulfilled(
         address indexed serviceProvider,
         address indexed verifier,
         address indexed owner,
         uint256 thawRequestsFulfilled,
-        uint256 tokens
+        uint256 tokens,
+        IHorizonStakingTypes.ThawRequestType requestType
     );
 
     // -- Events: governance --

packages/horizon/contracts/interfaces/internal/IHorizonStakingTypes.sol

@@ -180,4 +180,19 @@ interface IHorizonStakingTypes {
         uint256 nThawRequests;
         uint256 thawingNonce;
     }
+
+    /**
+     * @notice Results of the traversal of thaw requests.
+     * @dev This struct is used to avoid stack too deep error in the `fulfillThawRequests` function.
+     * @param requestsFulfilled The number of thaw requests fulfilled
+     * @param tokensThawed The total amount of tokens thawed
+     * @param tokensThawing The total amount of tokens thawing
+     * @param sharesThawing The total amount of shares thawing
+     */
+    struct TraverseThawRequestsResults {
+        uint256 requestsFulfilled;
+        uint256 tokensThawed;
+        uint256 tokensThawing;
+        uint256 sharesThawing;
+    }
 }

packages/horizon/contracts/staking/HorizonStaking.sol

@@ -1078,8 +1078,33 @@ contract HorizonStaking is HorizonStakingBase, IHorizonStakingMain {
         );
         require(thawRequestList.count > 0, HorizonStakingNothingThawing());
 
+        TraverseThawRequestsResults memory results = _traverseThawRequests(params, thawRequestList);
+
+        emit ThawRequestsFulfilled(
+            params.serviceProvider,
+            params.verifier,
+            params.owner,
+            results.requestsFulfilled,
+            results.tokensThawed,
+            params.requestType
+        );
+
+        return (results.tokensThawed, results.tokensThawing, results.sharesThawing);
+    }
+
+    /**
+     * @notice Traverses a thaw request list and fulfills expired thaw requests.
+     * @param params The parameters for fulfilling thaw requests
+     * @param thawRequestList The list of thaw requests to traverse
+     * @return The results of the traversal
+     */
+    function _traverseThawRequests(
+        FulfillThawRequestsParams memory params,
+        LinkedList.List storage thawRequestList
+    ) private returns (TraverseThawRequestsResults memory) {
         function(bytes32) view returns (bytes32) getNextItem = _getNextThawRequest(params.requestType);
         function(bytes32) deleteItem = _getDeleteThawRequest(params.requestType);
+
         bytes memory acc = abi.encode(
             params.requestType,
             uint256(0),
@@ -1099,14 +1124,14 @@ contract HorizonStaking is HorizonStakingBase, IHorizonStakingMain {
             data,
             (ThawRequestType, uint256, uint256, uint256)
         );
-        emit ThawRequestsFulfilled(
-            params.serviceProvider,
-            params.verifier,
-            params.owner,
-            thawRequestsFulfilled,
-            tokensThawed
-        );
-        return (tokensThawed, tokensThawing, sharesThawing);
+
+        return
+            TraverseThawRequestsResults({
+                requestsFulfilled: thawRequestsFulfilled,
+                tokensThawed: tokensThawed,
+                tokensThawing: tokensThawing,
+                sharesThawing: sharesThawing
+            });
     }
 
     /**

packages/horizon/test/shared/horizon-staking/HorizonStakingShared.t.sol

@@ -504,7 +504,8 @@ abstract contract HorizonStakingSharedTest is GraphBaseTest {
             verifier,
             serviceProvider,
             calcValues.thawRequestsFulfilledList.length,
-            calcValues.tokensThawed
+            calcValues.tokensThawed,
+            IHorizonStakingTypes.ThawRequestType.Provision
         );
         vm.expectEmit(address(staking));
         emit IHorizonStakingMain.TokensDeprovisioned(serviceProvider, verifier, calcValues.tokensThawed);
@@ -617,7 +618,8 @@ abstract contract HorizonStakingSharedTest is GraphBaseTest {
             verifier,
             serviceProvider,
             calcValues.thawRequestsFulfilledList.length,
-            calcValues.tokensThawed
+            calcValues.tokensThawed,
+            IHorizonStakingTypes.ThawRequestType.Provision
         );
         vm.expectEmit(address(staking));
         emit IHorizonStakingMain.TokensDeprovisioned(serviceProvider, verifier, calcValues.tokensThawed);
@@ -1160,7 +1162,8 @@ abstract contract HorizonStakingSharedTest is GraphBaseTest {
             params.verifier,
             msgSender,
             calcValues.thawRequestsFulfilledList.length,
-            calcValues.tokensThawed
+            calcValues.tokensThawed,
+            params.thawRequestType
         );
         if (calcValues.tokensThawed != 0) {
             vm.expectEmit();