program: less order param sanitization for long tail perps (#1680)

* program: allow-auction-start-buffer-on-tail-mkt

* fix test

* cargo fmt --

* CHANGELOG

---------

Co-authored-by: 0xbigz <[email protected]>

Author: crispheaney

CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Features
 
+- program: sanitize long tail perp market orders less frequently ([#1641](https://github.com/drift-labs/protocol-v2/pull/1641))
+
 ### Fixes
 
 ### Breaking

programs/drift/src/state/order_params.rs

@@ -391,14 +391,19 @@ impl OrderParams {
                 )?;
             let current_start_price_offset = self.get_auction_start_price_offset(oracle_price)?;
             let current_end_price_offset = self.get_auction_end_price_offset(oracle_price)?;
+
+            let is_tail_mkt = !perp_market
+                .contract_tier
+                .is_as_safe_as_contract(&ContractTier::B);
+
             match self.direction {
                 PositionDirection::Long => {
-                    let long_start_threshold = if is_signed_msg {
+                    let long_start_threshold = if is_signed_msg || is_tail_mkt {
                         new_start_price_offset.safe_add(oracle_price.abs().safe_div(1000)?)?
                     } else {
                         new_start_price_offset
                     };
-                    let long_end_threshold = if is_signed_msg {
+                    let long_end_threshold = if is_signed_msg || is_tail_mkt {
                         new_end_price_offset.safe_add(oracle_price.abs().safe_div(1000)?)?
                     } else {
                         new_end_price_offset
@@ -428,12 +433,12 @@ impl OrderParams {
                     }
                 }
                 PositionDirection::Short => {
-                    let short_start_threshold = if is_signed_msg {
+                    let short_start_threshold = if is_signed_msg || is_tail_mkt {
                         new_start_price_offset.safe_sub(oracle_price.abs().safe_div(1000)?)?
                     } else {
                         new_start_price_offset
                     };
-                    let short_end_threshold = if is_signed_msg {
+                    let short_end_threshold = if is_signed_msg || is_tail_mkt {
                         new_end_price_offset.safe_sub(oracle_price.abs().safe_div(1000)?)?
                     } else {
                         new_end_price_offset
@@ -889,7 +894,7 @@ fn get_auction_duration(
     Ok(percent_diff
         .safe_mul(slots_per_bp)?
         .safe_div_ceil(PERCENTAGE_PRECISION_U64 / 100)? // 1% = 60 slots
-        .clamp(10, 180) as u8) // 180 slots max
+        .clamp(1, 180) as u8) // 180 slots max
 }
 
 #[derive(Clone, Copy, BorshSerialize, BorshDeserialize, PartialEq, Debug, Eq, Default)]

programs/drift/src/state/order_params/tests.rs

@@ -11,13 +11,13 @@ mod get_auction_duration {
         let contract_tier = ContractTier::C;
 
         let duration = get_auction_duration(price_diff, price, contract_tier).unwrap();
-        assert_eq!(duration, 10);
+        assert_eq!(duration, 1);
 
         let price_diff = PRICE_PRECISION_U64 / 10;
         let price = 100 * PRICE_PRECISION_U64;
 
         let duration = get_auction_duration(price_diff, price, contract_tier).unwrap();
-        assert_eq!(duration, 10);
+        assert_eq!(duration, 6);
 
         let price_diff = PRICE_PRECISION_U64 / 2;
         let price = 100 * PRICE_PRECISION_U64;
@@ -168,6 +168,7 @@ mod update_perp_auction_params {
         amm.historical_oracle_data.last_oracle_price = oracle_price;
         let perp_market = PerpMarket {
             amm,
+            contract_tier: ContractTier::A,
             ..PerpMarket::default()
         };
 
@@ -262,7 +263,7 @@ mod update_perp_auction_params {
         );
         assert_eq!(
             order_params_long_after_not_signed.auction_duration,
-            Some(30)
+            Some(31)
         );
         assert_eq!(sanitized, true);
     }
@@ -290,6 +291,7 @@ mod update_perp_auction_params {
         amm.historical_oracle_data.last_oracle_price = oracle_price;
         let perp_market = PerpMarket {
             amm,
+            contract_tier: ContractTier::A,
             ..PerpMarket::default()
         };
 
@@ -387,7 +389,7 @@ mod update_perp_auction_params {
         );
         assert_eq!(
             order_params_long_after_not_signed.auction_duration,
-            Some(30)
+            Some(31)
         );
         assert_eq!(sanitized, true);
     }