Merge pull request #83 from blend-capital/add-apy

feat: add apy calcs and fix backstop take rate application

Author: mootz12

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@blend-capital/blend-sdk",
-  "version": "3.0.0-beta.6",
+  "version": "3.0.0-beta.7",
   "description": "Javascript SDK for the Blend Protocol",
   "type": "module",
   "scripts": {

package.json

@@ -125,9 +125,11 @@ export class PoolV2 extends Pool {
         contractReserve.data,
         0,
         0,
+        0,
+        0,
         latestLedger
       );
-      reserve.setAPR();
+      reserve.setRates(BigInt(metadata.backstopRate));
       reserves.set(reserve.assetId, reserve);
     });
 

src/pool/pool.ts

@@ -17,9 +17,9 @@ export class PoolEstimate {
      */
     public totalBorrowed: number,
     /**
-     * The average APR accrued by all borrowed tokens
+     * The average APY accrued by all borrowed tokens
      */
-    public avgBorrowApr: number
+    public avgBorrowApy: number
   ) {}
 
   static build(reserves: Map<string, Reserve>, poolOracle: PoolOracle): PoolEstimate {
@@ -34,11 +34,11 @@ export class PoolEstimate {
         const reserveLiabilitiesBase =
           toFloat(reserve.totalLiabilities(), reserve.config.decimals) * oraclePrice;
         totalBorrowed += reserveLiabilitiesBase;
-        totalInterestInYear += reserveLiabilitiesBase * reserve.borrowApr;
+        totalInterestInYear += reserveLiabilitiesBase * reserve.estBorrowApy;
       }
     }
-    const avgBorrowApr = totalBorrowed != 0 ? totalInterestInYear / totalBorrowed : 0;
+    const avgBorrowApy = totalBorrowed != 0 ? totalInterestInYear / totalBorrowed : 0;
 
-    return new PoolEstimate(totalSupply, totalBorrowed, avgBorrowApr);
+    return new PoolEstimate(totalSupply, totalBorrowed, avgBorrowApy);
   }
 }