Add back getLockedBeansfromTwaReserves

protocol/contracts/beanstalk/barn/UnripeFacet.sol

@@ -349,6 +349,21 @@ contract UnripeFacet is Invariable, ReentrancyGuard {
         return LibUnripe.getLockedBeansFromLP(twaReserves);
     }
 
+    /**
+     * @notice Returns the locked beans given the cumulative reserves and timestamp.
+     */
+    function getLockedBeansFromTwaReserves(
+        bytes memory cumulativeReserves,
+        uint40 timestamp
+    ) external view returns (uint256) {
+        uint256[] memory twaReserves = LibWell.getTwaReservesFromPump(
+            LibBarnRaise.getBarnRaiseWell(),
+            cumulativeReserves,
+            timestamp
+        );
+        return LibUnripe.getLockedBeans(twaReserves);
+    }
+
     /**
      * @notice returns the amount of dollars recapitalized in the barn raise.
      */

protocol/contracts/libraries/Well/LibWell.sol

@@ -290,6 +290,29 @@ library LibWell {
         }
     }
 
+    /**
+     * @notice returns the twa reserves for well, 
+     * given the cumulative reserves and timestamp.
+     * @dev wrapped in a try/catch to return gracefully.
+     */
+    function getTwaReservesFromPump(
+        address well,
+        bytes memory cumulativeReserves,
+        uint40 timestamp
+    ) internal view returns (uint256[] memory) {
+        Call[] memory pump = IWell(well).pumps();
+        try ICumulativePump(pump[0].target).readTwaReserves(
+            well,
+            cumulativeReserves,
+            timestamp,
+            pump[0].data
+        ) returns (uint[] memory twaReserves, bytes memory) {
+            return twaReserves;
+        } catch {
+            return (new uint256[](2));
+        }
+    }
+
     /**
      * @notice gets the TwaLiquidity of a given well.
      * @dev only supports wells that are whitelisted in beanstalk.