allow purging of anyone's orders and positions in force-closed markets

programs/mango-v4/src/accounts_ix/mod.rs

@@ -44,6 +44,7 @@ pub use perp_liq_base_or_positive_pnl::*;
 pub use perp_liq_force_cancel_orders::*;
 pub use perp_liq_negative_pnl_or_bankruptcy::*;
 pub use perp_place_order::*;
+pub use perp_prune_orders::*;
 pub use perp_settle_fees::*;
 pub use perp_settle_pnl::*;
 pub use perp_update_funding::*;
@@ -125,6 +126,7 @@ mod perp_liq_base_or_positive_pnl;
 mod perp_liq_force_cancel_orders;
 mod perp_liq_negative_pnl_or_bankruptcy;
 mod perp_place_order;
+mod perp_prune_orders;
 mod perp_settle_fees;
 mod perp_settle_pnl;
 mod perp_update_funding;

programs/mango-v4/src/accounts_ix/perp_prune_orders.rs

@@ -0,0 +1,27 @@
+use crate::state::{BookSide, Group, PerpMarket};
+use anchor_lang::prelude::*;
+
+#[derive(Accounts)]
+pub struct PerpPruneOrders<'info> {
+    #[account()]
+    pub group: AccountLoader<'info, Group>,
+
+    #[account(
+        mut,
+        has_one = group,
+        // owner is not checked on purpose
+    )]
+    pub account: AccountLoader<'info, MangoAccountFixed>,
+
+    #[account(
+        mut,
+        has_one = group,
+        has_one = bids,
+        has_one = asks,
+    )]
+    pub perp_market: AccountLoader<'info, PerpMarket>,
+    #[account(mut)]
+    pub bids: AccountLoader<'info, BookSide>,
+    #[account(mut)]
+    pub asks: AccountLoader<'info, BookSide>,
+}

programs/mango-v4/src/instructions/mod.rs

@@ -34,6 +34,7 @@ pub use perp_liq_base_or_positive_pnl::*;
 pub use perp_liq_force_cancel_orders::*;
 pub use perp_liq_negative_pnl_or_bankruptcy::*;
 pub use perp_place_order::*;
+pub use perp_prune_orders::*;
 pub use perp_settle_fees::*;
 pub use perp_settle_pnl::*;
 pub use perp_update_funding::*;
@@ -106,6 +107,7 @@ mod perp_liq_base_or_positive_pnl;
 mod perp_liq_force_cancel_orders;
 mod perp_liq_negative_pnl_or_bankruptcy;
 mod perp_place_order;
+mod perp_prune_orders;
 mod perp_settle_fees;
 mod perp_settle_pnl;
 mod perp_update_funding;

programs/mango-v4/src/instructions/perp_prune_orders.rs

@@ -0,0 +1,25 @@
+use anchor_lang::prelude::*;
+
+use crate::accounts_ix::*;
+use crate::error::MangoError;
+use crate::state::*;
+
+pub fn perp_prune_orders(ctx: Context<PerpPruneOrders>, limit: u8) -> Result<()> {
+    let mut perp_market: PerpMarket = ctx.accounts.perp_market.load_mut()?;
+    // only allow pruning orders when market is in force-close
+    require!(perp_market.is_force_close(), MangoError::SomeError);
+
+    let mut account = ctx.accounts.account.load_full_mut()?;
+    let mut book = Orderbook {
+        bids: ctx.accounts.bids.load_mut()?,
+        asks: ctx.accounts.asks.load_mut()?,
+    };
+
+    book.cancel_all_orders(
+        account,
+        &ctx.accounts.account.key(),
+        &mut perp_market,
+        limit,
+        None,
+    )
+}

programs/mango-v4/src/lib.rs

@@ -1320,6 +1320,12 @@ pub mod mango_v4 {
         Ok(())
     }
 
+    pub fn perp_prune_orders(ctx: Context<PerpPruneOrders>, limit: u8) -> Result<()> {
+        #[cfg(feature = "enable-gpl")]
+        instructions::perp_prune_orders(ctx, limit)?;
+        Ok(())
+    }
+
     pub fn perp_consume_events(ctx: Context<PerpConsumeEvents>, limit: usize) -> Result<()> {
         #[cfg(feature = "enable-gpl")]
         instructions::perp_consume_events(ctx, limit)?;