fixes from cr

Signed-off-by: microwavedcola1 <microwavedcola@gmail.com>

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

@@ -75,6 +75,15 @@ pub struct RegisterToken<'info> {
     pub rent: Sysvar<'info, Rent>,
 }
 
+#[derive(AnchorSerialize, AnchorDeserialize, Default)]
+pub struct InterestRateParams {
+    util0: f32,
+    rate0: f32,
+    util1: f32,
+    rate1: f32,
+    max_rate: f32,
+}
+
 // TODO: should this be "configure_mint", we pass an explicit index, and allow
 // overwriting config as long as the mint account stays the same?
 #[allow(clippy::too_many_arguments)]
@@ -82,11 +91,7 @@ pub fn register_token(
     ctx: Context<RegisterToken>,
     token_index: TokenIndex,
     name: String,
-    util0: f32,
-    rate0: f32,
-    util1: f32,
-    rate1: f32,
-    max_rate: f32,
+    interest_rate_params: InterestRateParams,
     maint_asset_weight: f32,
     init_asset_weight: f32,
     maint_liab_weight: f32,
@@ -107,11 +112,12 @@ pub fn register_token(
         indexed_total_deposits: I80F48::ZERO,
         indexed_total_borrows: I80F48::ZERO,
         last_updated: Clock::get()?.unix_timestamp,
-        util0: I80F48::from_num(util0),
-        rate0: I80F48::from_num(rate0),
-        util1: I80F48::from_num(util1),
-        rate1: I80F48::from_num(rate1),
-        max_rate: I80F48::from_num(max_rate),
+        // TODO: add a require! verifying relation between the parameters
+        util0: I80F48::from_num(interest_rate_params.util0),
+        rate0: I80F48::from_num(interest_rate_params.rate0),
+        util1: I80F48::from_num(interest_rate_params.util1),
+        rate1: I80F48::from_num(interest_rate_params.rate1),
+        max_rate: I80F48::from_num(interest_rate_params.max_rate),
         maint_asset_weight: I80F48::from_num(maint_asset_weight),
         init_asset_weight: I80F48::from_num(init_asset_weight),
         maint_liab_weight: I80F48::from_num(maint_liab_weight),

programs/mango-v4/src/lib.rs

@@ -38,11 +38,7 @@ pub mod mango_v4 {
         ctx: Context<RegisterToken>,
         token_index: TokenIndex,
         name: String,
-        util0: f32,
-        rate0: f32,
-        util1: f32,
-        rate1: f32,
-        max_rate: f32,
+        interest_rate_params: InterestRateParams,
         maint_asset_weight: f32,
         init_asset_weight: f32,
         maint_liab_weight: f32,
@@ -53,11 +49,7 @@ pub mod mango_v4 {
             ctx,
             token_index,
             name,
-            util0,
-            rate0,
-            util1,
-            rate1,
-            max_rate,
+            interest_rate_params,
             maint_asset_weight,
             init_asset_weight,
             maint_liab_weight,

programs/mango-v4/src/state/bank.rs

@@ -176,12 +176,11 @@ impl Bank {
         let interest_rate = self.compute_interest_rate(utilization);
 
         let diff_ts = I80F48::from_num(now_ts - self.last_updated);
+        self.last_updated = now_ts;
 
         let borrow_interest: I80F48 = cm!(interest_rate * diff_ts);
         let deposit_interest = cm!(borrow_interest * utilization);
 
-        self.last_updated = Clock::get()?.unix_timestamp;
-
         if borrow_interest <= I80F48::ZERO || deposit_interest <= I80F48::ZERO {
             return Ok(());
         }
@@ -225,9 +224,9 @@ impl Bank {
             let slope = cm!((rate1 - rate0) / (util1 - util0));
             cm!(rate0 + slope * extra_util)
         } else {
-            let extra_util = utilization - util1;
-            let slope = (max_rate - rate1) / (I80F48::ONE - util1);
-            rate1 + slope * extra_util
+            let extra_util = cm!(utilization - util1);
+            let slope = cm!((max_rate - rate1) / (I80F48::ONE - util1));
+            cm!(rate1 + slope * extra_util)
         }
     }
 }

ts/client.ts

@@ -92,11 +92,7 @@ export class MangoClient {
       .registerToken(
         tokenIndex,
         name,
-        util0,
-        rate0,
-        util1,
-        rate1,
-        maxRate,
+        { util0, rate0, util1, rate1, maxRate },
         maintAssetWeight,
         initAssetWeight,
         maintLiabWeight,

ts/mango_v4.ts

@@ -169,24 +169,10 @@ export type MangoV4 = {
           "type": "string"
         },
         {
-          "name": "util0",
-          "type": "f32"
-        },
-        {
-          "name": "rate0",
-          "type": "f32"
-        },
-        {
-          "name": "util1",
-          "type": "f32"
-        },
-        {
-          "name": "rate1",
-          "type": "f32"
-        },
-        {
-          "name": "maxRate",
-          "type": "f32"
+          "name": "interestRateParams",
+          "type": {
+            "defined": "InterestRateParams"
+          }
         },
         {
           "name": "maintAssetWeight",
@@ -2154,6 +2140,34 @@ export type MangoV4 = {
         ]
       }
     },
+    {
+      "name": "InterestRateParams",
+      "type": {
+        "kind": "struct",
+        "fields": [
+          {
+            "name": "util0",
+            "type": "f32"
+          },
+          {
+            "name": "rate0",
+            "type": "f32"
+          },
+          {
+            "name": "util1",
+            "type": "f32"
+          },
+          {
+            "name": "rate1",
+            "type": "f32"
+          },
+          {
+            "name": "maxRate",
+            "type": "f32"
+          }
+        ]
+      }
+    },
     {
       "name": "TokenIndex",
       "type": {
@@ -2671,24 +2685,10 @@ export const IDL: MangoV4 = {
           "type": "string"
         },
         {
-          "name": "util0",
-          "type": "f32"
-        },
-        {
-          "name": "rate0",
-          "type": "f32"
-        },
-        {
-          "name": "util1",
-          "type": "f32"
-        },
-        {
-          "name": "rate1",
-          "type": "f32"
-        },
-        {
-          "name": "maxRate",
-          "type": "f32"
+          "name": "interestRateParams",
+          "type": {
+            "defined": "InterestRateParams"
+          }
         },
         {
           "name": "maintAssetWeight",
@@ -4656,6 +4656,34 @@ export const IDL: MangoV4 = {
         ]
       }
     },
+    {
+      "name": "InterestRateParams",
+      "type": {
+        "kind": "struct",
+        "fields": [
+          {
+            "name": "util0",
+            "type": "f32"
+          },
+          {
+            "name": "rate0",
+            "type": "f32"
+          },
+          {
+            "name": "util1",
+            "type": "f32"
+          },
+          {
+            "name": "rate1",
+            "type": "f32"
+          },
+          {
+            "name": "maxRate",
+            "type": "f32"
+          }
+        ]
+      }
+    },
     {
       "name": "TokenIndex",
       "type": {

update-local-idl.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+set -e pipefail
+
+anchor build --skip-lint
+./idl-fixup.sh
+cp -v ./target/types/mango_v4.ts ./ts/mango_v4.ts
+tsc