        lastRequestTimestamp = block.timestamp;
        lastRequestFulfilled = false;

        try source.requestRandomNumber() {
            emit SuccessfulRNRequest(source);
        } catch Error(string memory reason) {
            emit FailedRNRequest(source, bytes(reason));
        } catch (bytes memory reason) {
            emit FailedRNRequest(source, reason);
        }
    }
