feat: add shares to TokensUndelegated

Author: juanmardefago

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

@@ -186,12 +186,14 @@ interface IHorizonStakingMain {
      * @param verifier The address of the verifier
      * @param delegator The address of the delegator
      * @param tokens The amount of tokens undelegated
+     * @param tokens The amount of shares undelegated
      */
     event TokensUndelegated(
         address indexed serviceProvider,
         address indexed verifier,
         address indexed delegator,
-        uint256 tokens
+        uint256 tokens,
+        uint256 shares
     );
 
     /**

packages/horizon/contracts/staking/HorizonStaking.sol

@@ -939,7 +939,7 @@ contract HorizonStaking is HorizonStakingBase, IHorizonStakingMain {
             pool.thawingNonce
         );
 
-        emit TokensUndelegated(_serviceProvider, _verifier, msg.sender, tokens);
+        emit TokensUndelegated(_serviceProvider, _verifier, msg.sender, tokens, _shares);
         return thawRequestId;
     }
 

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

@@ -1010,7 +1010,7 @@ abstract contract HorizonStakingSharedTest is GraphBaseTest {
             calcValues.thawRequestId
         );
         vm.expectEmit();
-        emit IHorizonStakingMain.TokensUndelegated(serviceProvider, verifier, delegator, calcValues.tokens);
+        emit IHorizonStakingMain.TokensUndelegated(serviceProvider, verifier, delegator, calcValues.tokens, shares);
         if (legacy) {
             staking.undelegate(serviceProvider, shares);
         } else if (thawRequestType == IHorizonStakingTypes.ThawRequestType.Delegation) {