sliding down borrow limit and 1 percent close factor

solendprotocol · Jun 21, 2022 · 40f0a03 · 40f0a03
1 parent 46cdf9a
commit 40f0a03
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Showing 2 changed files with 41 additions and 4 deletions.
diff --git a/token-lending/program/src/processor.rs b/token-lending/program/src/processor.rs
@@ -28,7 +28,11 @@ use solana_program::{
 };
 use spl_token::solana_program::instruction::AccountMeta;
 use spl_token::state::{Account, Mint};
-use std::{convert::TryInto, result::Result};
+use std::{
+    cmp::{max, min},
+    convert::TryInto,
+    result::Result,
+};
 use switchboard_program::{
     get_aggregator, get_aggregator_result, AggregatorState, RoundResult, SwitchboardAccountType,
 };
@@ -897,8 +901,41 @@ fn process_refresh_obligation(program_id: &Pubkey, accounts: &[AccountInfo]) ->
 
     obligation.deposited_value = deposited_value;
     obligation.borrowed_value = borrowed_value;
-    obligation.allowed_borrow_value = allowed_borrow_value;
-    obligation.unhealthy_borrow_value = unhealthy_borrow_value;
+
+    let start_slot = 138307846u64;
+    let end_slot = 138307846u64;
+    let current_slot_in_range = min(max(start_slot, clock.slot), end_slot);
+    let numerator = end_slot
+        .checked_sub(current_slot_in_range)
+        .ok_or(LendingError::MathOverflow)?;
+    let denominator = end_slot
+        .checked_sub(start_slot)
+        .ok_or(LendingError::MathOverflow)?;
+
+    let start_global_unhealthy_borrow_value = Decimal::from(110000000u64);
+    let end_global_unhealthy_borrow_value = Decimal::from(50000000u64);
+
+    // let mut global_unhealthy_borrow_value = end_global_unhealthy_borrow_value;
+    // if unhealthy_borrow_value > end_global_unhealthy_borrow_value  {
+    //     global_unhealthy_borrow_value = end_global_unhealthy_borrow_value
+    //     .try_add(
+    //         start_global_unhealthy_borrow_value
+    //         .try_sub(end_global_unhealthy_borrow_value)?
+    //         .try_mul(numerator)?
+    //         .try_div(denominator)?
+    //     )?;
+    // }
+    let global_unhealthy_borrow_value = end_global_unhealthy_borrow_value.try_add(
+        start_global_unhealthy_borrow_value
+            .try_sub(end_global_unhealthy_borrow_value)?
+            .try_mul(numerator)?
+            .try_div(denominator)?,
+    )?;
+    let global_allowed_borrow_value =
+        global_unhealthy_borrow_value.try_sub(Decimal::from(5000000u64))?;
+
+    obligation.allowed_borrow_value = min(allowed_borrow_value, global_allowed_borrow_value);
+    obligation.unhealthy_borrow_value = min(unhealthy_borrow_value, global_unhealthy_borrow_value);
 
     obligation.last_update.update_slot(clock.slot);
     Obligation::pack(obligation, &mut obligation_info.data.borrow_mut())?;

diff --git a/token-lending/program/src/state/reserve.rs b/token-lending/program/src/state/reserve.rs
@@ -18,7 +18,7 @@ use std::{
 };
 
 /// Percentage of an obligation that can be repaid during each liquidation call
-pub const LIQUIDATION_CLOSE_FACTOR: u8 = 20;
+pub const LIQUIDATION_CLOSE_FACTOR: u8 = 1;
 
 /// Obligation borrow amount that is small enough to close out
 pub const LIQUIDATION_CLOSE_AMOUNT: u64 = 2;