Merge pull request #93 from 1inch/feature/reReason

Introduce RevertReasonForwarder.reReason()
1inch · Sep 28, 2023 · 339ff9e · 339ff9e
2 parents 94ca5bd + 0079dde
commit 339ff9e
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/contracts/libraries/RevertReasonForwarder.sol b/contracts/libraries/RevertReasonForwarder.sol
@@ -13,4 +13,15 @@ library RevertReasonForwarder {
             revert(ptr, returndatasize())
         }
     }
+
+    /// @dev Returns latest external call revert reason.
+    function reReason() internal pure returns (bytes memory reason) {
+        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
+            reason := mload(0x40)
+            let length := returndatasize()
+            mstore(reason, length)
+            returndatacopy(add(reason, 0x20), 0, length)
+            mstore(0x40, add(reason, add(0x20, length)))
+        }
+    }
 }