Draft: eMode draft impl (WIP)

contracts/sources/cell.move

@@ -16,6 +16,10 @@ module suilend::cell {
     public fun get<Element>(cell: &Cell<Element>): &Element {
         option::borrow(&cell.element)
     }
+
+    public fun get_mut<Element>(cell: &mut Cell<Element>): &mut Element {
+        option::borrow_mut(&mut cell.element)
+    }
 
     public fun destroy<Element>(cell: Cell<Element>): Element {
         let Cell { element } = cell;

contracts/sources/lending_market.move

@@ -379,6 +379,30 @@ module suilend::lending_market {
         obligation::zero_out_rewards_if_looped(obligation, &mut lending_market.reserves, clock);
         coin::from_balance(receive_balance, ctx)
     }
+
+    /// Set emode for obligation - T is the deposit coin type
+    public fun set_emode<P>(
+        lending_market: &mut LendingMarket<P>,
+        deposit_reserve_array_index: u64,
+        borrow_reserve_array_index: u64,
+        obligation_owner_cap: &ObligationOwnerCap<P>,
+    ) {
+        assert!(lending_market.version == CURRENT_VERSION, EIncorrectVersion);
+
+        let obligation = object_table::borrow_mut(
+            &mut lending_market.obligations, 
+            obligation_owner_cap.obligation_id
+        );
+
+        let deposit_reserve = vector::borrow(&lending_market.reserves, deposit_reserve_array_index);
+        let borrow_reserve = vector::borrow(&lending_market.reserves, borrow_reserve_array_index);
+
+        obligation::set_emode(
+            obligation,
+            deposit_reserve,
+            borrow_reserve,
+        );
+    }
 
     public fun withdraw_ctokens<P, T>(
         lending_market: &mut LendingMarket<P>,
@@ -819,6 +843,22 @@ module suilend::lending_market {
         reserve::update_reserve_config<P>(reserve, config);
     }
 
+    public fun set_emode_for_pair<P, T>(
+        _: &LendingMarketOwnerCap<P>, 
+        lending_market: &mut LendingMarket<P>, 
+        reserve_array_index: u64,
+        pair_reserve_array_index: u64,
+        open_ltv_pct: u8,
+        close_ltv_pct: u8,
+    ) {
+        assert!(lending_market.version == CURRENT_VERSION, EIncorrectVersion);
+
+        let reserve = vector::borrow_mut(&mut lending_market.reserves, reserve_array_index);
+        assert!(reserve::coin_type(reserve) == type_name::get<T>(), EWrongType);
+
+        reserve::set_emode_for_pair<P>(reserve, pair_reserve_array_index, open_ltv_pct, close_ltv_pct);
+    }
+
     public fun add_pool_reward<P, RewardType>(
         _: &LendingMarketOwnerCap<P>, 
         lending_market: &mut LendingMarket<P>,