program: allow resolve perp pnl deficit if pnl pool isnt 0 but at deficit (#1909)

* program: update-resolve-perp-pnl-pool-validate

* CHANGELOG

---------

Co-authored-by: Chris Heaney <[email protected]>

Author: 0xbigz

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Features
 
+- program: allow resolve perp pnl deficit if pnl pool isnt 0 but at deficit ([#1909](https://github.com/drift-labs/protocol-v2/pull/1909))
 - program: auction order params account for twap divergence ([#1882](https://github.com/drift-labs/protocol-v2/pull/1882))
 - program: add delegate stake if ([#1859](https://github.com/drift-labs/protocol-v2/pull/1859))
 

programs/drift/src/controller/amm.rs

@@ -11,7 +11,7 @@ use crate::controller::spot_balance::{
 };
 use crate::error::{DriftResult, ErrorCode};
 use crate::get_then_update_id;
-use crate::math::amm::calculate_quote_asset_amount_swapped;
+use crate::math::amm::{calculate_net_user_pnl, calculate_quote_asset_amount_swapped};
 use crate::math::amm_spread::{calculate_spread_reserves, get_spread_reserves};
 use crate::math::casting::Cast;
 use crate::math::constants::{
@@ -942,7 +942,7 @@ pub fn calculate_perp_market_amm_summary_stats(
         .safe_add(fee_pool_token_amount)?
         .cast()?;
 
-    let net_user_pnl = amm::calculate_net_user_pnl(&perp_market.amm, perp_market_oracle_price)?;
+    let net_user_pnl = calculate_net_user_pnl(&perp_market.amm, perp_market_oracle_price)?;
 
     // amm's mm_fee can be incorrect with drifting integer math error
     let mut new_total_fee_minus_distributions = pnl_tokens_available.safe_sub(net_user_pnl)?;

programs/drift/src/controller/insurance.rs

@@ -843,11 +843,20 @@ pub fn resolve_perp_pnl_deficit(
         &SpotBalanceType::Deposit,
     )?;
 
+    let net_user_pnl = calculate_net_user_pnl(
+        &market.amm,
+        market
+            .amm
+            .historical_oracle_data
+            .last_oracle_price_twap_5min,
+    )?;
+
     validate!(
-        pnl_pool_token_amount == 0,
+        pnl_pool_token_amount.cast::<i128>()? < net_user_pnl,
         ErrorCode::SufficientPerpPnlPool,
-        "pnl_pool_token_amount > 0 (={})",
-        pnl_pool_token_amount
+        "pnl_pool_token_amount >= net_user_pnl ({} >= {})",
+        pnl_pool_token_amount,
+        net_user_pnl
     )?;
 
     update_spot_market_cumulative_interest(spot_market, None, now)?;