disable tcs & allow purging open orders if conflicting with bank redu…

…ce_only setting

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

@@ -67,6 +67,7 @@ pub use token_add_bank::*;
 pub use token_charge_collateral_fees::*;
 pub use token_conditional_swap_cancel::*;
 pub use token_conditional_swap_create::*;
+pub use token_conditional_swap_purge::*;
 pub use token_conditional_swap_start::*;
 pub use token_conditional_swap_trigger::*;
 pub use token_deposit::*;
@@ -150,6 +151,7 @@ mod token_add_bank;
 mod token_charge_collateral_fees;
 mod token_conditional_swap_cancel;
 mod token_conditional_swap_create;
+mod token_conditional_swap_purge;
 mod token_conditional_swap_start;
 mod token_conditional_swap_trigger;
 mod token_deposit;

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

@@ -0,0 +1,31 @@
+use crate::error::*;
+use crate::state::*;
+use anchor_lang::prelude::*;
+
+#[derive(Accounts)]
+pub struct TokenConditionalSwapCancel<'info> {
+    #[account(
+        constraint = group.load()?.is_ix_enabled(IxGate::TokenConditionalSwapCancel) @ MangoError::IxIsDisabled,
+    )]
+    pub group: AccountLoader<'info, Group>,
+
+    #[account(
+        mut,
+        has_one = group,
+        constraint = account.load()?.is_operational() @ MangoError::AccountIsFrozen,
+        // owner is not checked on purpose
+    )]
+    pub account: AccountLoader<'info, MangoAccountFixed>,
+
+    /// The bank's token_index is checked at #1
+    #[account(
+        mut,
+        has_one = group,
+    )]
+    pub buy_bank: AccountLoader<'info, Bank>,
+    #[account(
+        mut,
+        has_one = group,
+    )]
+    pub sell_bank: AccountLoader<'info, Bank>,
+}

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

@@ -58,6 +58,7 @@ pub use token_add_bank::*;
 pub use token_charge_collateral_fees::*;
 pub use token_conditional_swap_cancel::*;
 pub use token_conditional_swap_create::*;
+pub use token_conditional_swap_purge::*;
 pub use token_conditional_swap_start::*;
 pub use token_conditional_swap_trigger::*;
 pub use token_deposit::*;
@@ -132,6 +133,7 @@ mod token_add_bank;
 mod token_charge_collateral_fees;
 mod token_conditional_swap_cancel;
 mod token_conditional_swap_create;
+mod token_conditional_swap_purge;
 mod token_conditional_swap_start;
 mod token_conditional_swap_trigger;
 mod token_deposit;

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

@@ -1,14 +1,18 @@
 use anchor_lang::prelude::*;
 
 use crate::accounts_ix::*;
+use crate::error::MangoError;
 use crate::logs::{emit_stack, TokenConditionalSwapCreateLogV3};
 use crate::state::*;
 
-#[allow(clippy::too_many_arguments)]
+#[allow(clippy::too_many_arguments, unreachable_code)]
 pub fn token_conditional_swap_create(
     ctx: Context<TokenConditionalSwapCreate>,
     token_conditional_swap: TokenConditionalSwap,
 ) -> Result<()> {
+    // disable creation of new TCS
+    return Err(MangoError::IxIsDisabled.into());
+
     let group = ctx.accounts.group.load()?;
 
     let now_ts: u64 = Clock::get()?.unix_timestamp.try_into().unwrap();

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

@@ -0,0 +1,52 @@
+use anchor_lang::prelude::*;
+
+use crate::accounts_ix::*;
+use crate::error::MangoError;
+use crate::logs::{emit_stack, TokenConditionalSwapCancelLog};
+use crate::state::*;
+
+#[allow(clippy::too_many_arguments)]
+pub fn token_conditional_swap_purge(
+    ctx: Context<TokenConditionalSwapCancel>,
+    token_conditional_swap_index: usize,
+    token_conditional_swap_id: u64,
+) -> Result<()> {
+    let mut buy_bank = ctx.accounts.buy_bank.load_mut()?;
+    let mut sell_bank = ctx.accounts.sell_bank.load_mut()?;
+
+    require!(
+        buy_bank.are_deposits_reduce_only() || sell_bank.are_borrows_reduce_only(),
+        MangoError::IxIsDisabled
+    );
+
+    let mut account = ctx.accounts.account.load_full_mut()?;
+    let tcs = account.token_conditional_swap_mut_by_index(token_conditional_swap_index)?;
+    require_eq!(tcs.buy_token_index, buy_bank.token_index);
+    require_eq!(tcs.sell_token_index, sell_bank.token_index);
+
+    // If the tcs is already inactive, this just is a noop
+    if !tcs.is_configured() {
+        return Ok(());
+    }
+
+    require_eq!(
+        tcs.id,
+        token_conditional_swap_id,
+        MangoError::TokenConditionalSwapIndexIdMismatch
+    );
+    *tcs = TokenConditionalSwap::default();
+
+    emit_stack(TokenConditionalSwapCancelLog {
+        mango_group: ctx.accounts.group.key(),
+        mango_account: ctx.accounts.account.key(),
+        id: token_conditional_swap_id,
+    });
+
+    let now_ts: u64 = Clock::get()?.unix_timestamp.try_into().unwrap();
+
+    // Free up any locks on token positions, possibly dust and deactivate them.
+    account.token_decrement_dust_deactivate(&mut buy_bank, now_ts, ctx.accounts.account.key())?;
+    account.token_decrement_dust_deactivate(&mut sell_bank, now_ts, ctx.accounts.account.key())?;
+
+    Ok(())
+}

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

@@ -8,12 +8,15 @@ use crate::i80f48::ClampToInt;
 use crate::logs::{emit_stack, TokenBalanceLog, TokenConditionalSwapStartLog};
 use crate::state::*;
 
-#[allow(clippy::too_many_arguments)]
+#[allow(clippy::too_many_arguments, unreachable_code)]
 pub fn token_conditional_swap_start(
     ctx: Context<TokenConditionalSwapStart>,
     token_conditional_swap_index: usize,
     token_conditional_swap_id: u64,
 ) -> Result<()> {
+    // disable start of new TCS
+    return Err(MangoError::IxIsDisabled.into());
+
     let group_pk = &ctx.accounts.group.key();
     let liqee_key = ctx.accounts.liqee.key();
     let liqor_key = ctx.accounts.liqor.key();