feat: check bApp registered during OptIn (#53)

Author: riccardo-ssvlabs

src/core/modules/StrategyManager.sol

@@ -182,6 +182,10 @@ contract StrategyManager is ReentrancyGuardTransient, IStrategyManager {
 
         ValidationLib.validateArrayLengths(tokens, obligationPercentages);
 
+        if (!s.registeredBApps[bApp]) {
+            revert IBasedAppManager.BAppNotRegistered();
+        }
+
         // Check if a strategy exists for the given bApp.
         // It is not possible opt-in to the same bApp twice with the same strategy owner.
         if (s.accountBAppStrategy[msg.sender][bApp] != 0) {

test/modules/StrategyManager.t.sol

@@ -4,7 +4,7 @@ pragma solidity 0.8.29;
 import { IERC20, BasedAppMock } from "@ssv/test/helpers/Setup.t.sol";
 import { BasedAppsManagerTest } from "@ssv/test/modules/BasedAppsManager.t.sol";
 import { IStrategyManager } from "@ssv/src/core/interfaces/IStrategyManager.sol";
-import { IStrategyManager } from "@ssv/src/core/interfaces/IStrategyManager.sol";
+import { IBasedAppManager } from "@ssv/src/core/interfaces/IBasedAppManager.sol";
 import { UtilsTest } from "@ssv/test/helpers/Utils.t.sol";
 import { ValidationLib } from "@ssv/src/core/libraries/ValidationLib.sol";
 
@@ -1041,6 +1041,34 @@ contract StrategyManagerTest is UtilsTest, BasedAppsManagerTest {
         vm.stopPrank();
     }
 
+    function testRevertStrategyOptingInToNonExistingBApp(
+        uint32 percentage
+    ) public {
+        vm.assume(
+            percentage > 0 && percentage <= proxiedManager.maxPercentage()
+        );
+        testCreateStrategies();
+        vm.startPrank(USER1);
+        address[] memory tokensInput = new address[](0);
+        uint32[] memory obligationPercentagesInput = new uint32[](0);
+        for (uint256 i = 0; i < bApps.length; i++) {
+            vm.expectRevert(
+                abi.encodeWithSelector(
+                    IBasedAppManager.BAppNotRegistered.selector,
+                    address(erc20mock2)
+                )
+            );
+            proxiedManager.optInToBApp(
+                STRATEGY1,
+                address(bApps[i]),
+                tokensInput,
+                obligationPercentagesInput,
+                abi.encodePacked("0x00")
+            );
+        }
+        vm.stopPrank();
+    }
+
     function testStrategyOwnerDepositERC20WithNoObligation(
         uint256 amount
     ) public {