add apr helper

Author: 0xodia

solend-sdk/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@solendprotocol/solend-sdk",
-  "version": "0.13.32",
+  "version": "0.13.33",
   "private": true,
   "main": "src/index.ts",
   "module": "src/index.ts",

solend-sdk/src/core/index.ts

@@ -5,4 +5,5 @@ export * from "./actions";
 export * from "./margin";
 export * from "./actions";
 export * from "./utils/wallet";
-export * from "./rewards";
+export * from "./rewards";
+export * from "./utils/rates";

solend-sdk/src/core/utils/rates.ts

@@ -106,3 +106,10 @@ export const calculateSupplyInterest = (reserve: Reserve, showApy: boolean) =>
 
 export const calculateBorrowInterest = (reserve: Reserve, showApy: boolean) =>
   showApy ? calculateBorrowAPY(reserve) : calculateBorrowAPR(reserve);
+
+export const convertAprToApy = (apr: number) =>
+  new BigNumber(1)
+    .plus(new BigNumber(apr).dividedBy(SLOTS_PER_YEAR))
+    .toNumber() **
+    SLOTS_PER_YEAR -
+  1;