M-01 _checkBalance Returns an Incorrect Value During Insolvency

contracts/contracts/vault/OETHVaultCore.sol

@@ -395,15 +395,24 @@ contract OETHVaultCore is VaultCore {
         override
         returns (uint256 balance)
     {
+        if (_asset != weth) {
+            return 0;
+        }
+
+        // Get the WETH in the vault and the strategies
         balance = super._checkBalance(_asset);
 
-        if (_asset == weth) {
-            WithdrawalQueueMetadata memory queue = withdrawalQueueMetadata;
-            // Need to remove WETH that is reserved for the withdrawal queue
-            if (balance + queue.claimed >= queue.queued) {
-                return balance + queue.claimed - queue.queued;
-            }
+        WithdrawalQueueMetadata memory queue = withdrawalQueueMetadata;
+
+        // If the vault becomes insolvent enough that the total value in the vault and all strategies
+        // is less than the outstanding withdrawals.
+        // For example, there was a mass slashing event and most users request a withdrawal.
+        if (balance + queue.claimed < queue.queued) {
+            return 0;
         }
+
+        // Need to remove WETH that is reserved for the withdrawal queue
+        return balance + queue.claimed - queue.queued;
     }
 
     /**
@@ -446,29 +455,14 @@ contract OETHVaultCore is VaultCore {
         emit AssetAllocated(weth, depositStrategyAddr, allocateAmount);
     }
 
-    /// @dev The total value of all assets held by the vault and all its strategies
+    /// @dev The total value of all WETH held by the vault and all its strategies
     /// less any WETH that is reserved for the withdrawal queue.
-    /// For OETH, this is just WETH in the vault and strategies.
     ///
     // If there is not enough WETH in the vault and all strategies to cover all outstanding
     // withdrawal requests then return a total value of 0.
     function _totalValue() internal view override returns (uint256 value) {
-        value = _totalValueInVault() + _totalValueInStrategies();
-
-        // Need to remove WETH that is reserved for the withdrawal queue.
-        WithdrawalQueueMetadata memory queue = withdrawalQueueMetadata;
-        // reserved for the withdrawal queue = cumulative queued total - total claimed
-        uint256 reservedForQueue = queue.queued - queue.claimed;
-
-        if (value < reservedForQueue) {
-            // This can happen if the vault becomes insolvent enough that the
-            // total value in the vault and all strategies is less than the outstanding withdrawals.
-            // For example, there was a mass slashing event and most users request a withdrawal.
-            return 0;
-        }
-
-        // Adjust the total value by the amount reserved for the withdrawal queue
-        return value - reservedForQueue;
+        // As WETH is the only asset, just return the WETH balance
+        return _checkBalance(weth);
     }
 
     /// @dev Only WETH is supported in the OETH Vault so return the WETH balance only

contracts/test/vault/oeth-vault.js

@@ -2149,6 +2149,11 @@ describe("OETH Vault", function () {
           // 100 from mints - 99 outstanding withdrawals - 2 from slashing = -1 value which is rounder up to zero
           expect(await fixture.oethVault.totalValue()).to.equal(0);
         });
+        it("Should have check balance of zero", async () => {
+          const { oethVault, weth } = fixture;
+          // 100 from mints - 99 outstanding withdrawals - 2 from slashing = -1 value which is rounder up to zero
+          expect(await oethVault.checkBalance(weth.address)).to.equal(0);
+        });
         it("Fail to allow user to create a new request due to too many outstanding requests", async () => {
           const { oethVault, matt } = fixture;