Merge pull request #182 from morpho-labs/refactor/skip-interest-accrual

Skip interest accrual if already accrued in the same block
morpho-org · Jul 31, 2023 · 4e10a7b · 4e10a7b
2 parents 1f2ba2a + f5f40d2
commit 4e10a7b
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/Blue.sol b/src/Blue.sol
@@ -288,11 +288,15 @@ contract Blue is IFlashLender {
     // Interests management.
 
     function _accrueInterests(Market memory market, Id id) internal {
+        uint256 elapsed = block.timestamp - lastUpdate[id];
+
+        if (elapsed == 0) return;
+
         uint256 marketTotalBorrow = totalBorrow[id];
 
         if (marketTotalBorrow != 0) {
             uint256 borrowRate = market.irm.borrowRate(market);
-            uint256 accruedInterests = marketTotalBorrow.mulWadDown(borrowRate * (block.timestamp - lastUpdate[id]));
+            uint256 accruedInterests = marketTotalBorrow.mulWadDown(borrowRate * elapsed);
             totalBorrow[id] = marketTotalBorrow + accruedInterests;
             totalSupply[id] += accruedInterests;