add test

programs/drift/src/controller/orders.rs

@@ -1711,7 +1711,7 @@ fn get_maker_orders_info(
             }
 
             if maker_order.has_oracle_price_offset() && is_protected_maker {
-                if !oracle_valid_for_amm_fill || (oracle_delay > 0 && !user_can_skip_duration && taker_order_age < protected_maker_min_age) {
+                if !protected_maker_oracle_limit_can_fill(oracle_valid_for_amm_fill, oracle_delay, user_can_skip_duration, taker_order_age, protected_maker_min_age) {
                     continue;
                 }
             }
@@ -1727,6 +1727,17 @@ fn get_maker_orders_info(
     Ok(maker_orders_info)
 }
 
+#[inline(always)]
+fn protected_maker_oracle_limit_can_fill(
+    oracle_valid_for_amm_fill: bool,
+    oracle_delay: i64,
+    user_can_skip_duration: bool,
+    taker_order_age: u64,
+    protected_maker_min_age: u64,
+) -> bool {
+    oracle_valid_for_amm_fill && (oracle_delay == 0 || user_can_skip_duration || taker_order_age > protected_maker_min_age)
+}
+
 #[inline(always)]
 fn insert_maker_order_info(
     maker_orders_info: &mut Vec<(Pubkey, usize, u64)>,

programs/drift/src/controller/orders/tests.rs

@@ -12226,3 +12226,17 @@ mod update_maker_fills_map {
         assert_eq!(*map.get(&maker_key).unwrap(), -2 * fill as i64);
     }
 }
+
+pub mod protected_maker_oracle_limit_can_fill {
+    use crate::controller::orders::protected_maker_oracle_limit_can_fill;
+
+    #[test]
+    fn test() {
+        assert!(protected_maker_oracle_limit_can_fill(true, 0, true, 10, 10)); // all cases
+        assert!(protected_maker_oracle_limit_can_fill(true, 0, false, 9, 10)); // oracle delay is 0
+        assert!(protected_maker_oracle_limit_can_fill(true, 1, false, 10, 9)); // min age passed
+        assert!(protected_maker_oracle_limit_can_fill(true, 1, true, 9, 10)); // user exempt
+        assert!(!protected_maker_oracle_limit_can_fill(true, 1, false, 10, 11)); // no condition met
+        assert!(!protected_maker_oracle_limit_can_fill(false, 0, true, 10, 10)); // oracle valid for amm fill is false
+    }
+}

programs/drift/src/math/auction.rs

@@ -230,7 +230,7 @@ pub fn can_fill_with_amm(
     slot: u64,
     fill_mode: FillMode,
 ) -> DriftResult<bool> {
-    Ok(!(amm_availability == AMMAvailability::Unavailable)
+    Ok(amm_availability != AMMAvailability::Unavailable
         && valid_oracle_price.is_some()
         && (amm_availability == AMMAvailability::Immediate
             || is_amm_available_liquidity_source(order, min_auction_duration, slot, fill_mode)?))