feat: update layout

src/components/ReserveStatus/index.tsx

@@ -26,7 +26,7 @@ export const ReserveStatus = (props: {
   const liquidityMint = useMint(mintAddress);
   const { price } = useMidPriceInUSD(mintAddress);
   const availableLiquidity = fromLamports(
-    props.reserve.availableLiquidity.toNumber(),
+    props.reserve.state.availableLiquidity,
     liquidityMint
   );
 
@@ -35,7 +35,7 @@ export const ReserveStatus = (props: {
   const totalBorrows = useMemo(
     () =>
       fromLamports(
-        wadToLamports(props.reserve.borrowedLiquidityWad),
+        wadToLamports(props.reserve.state.borrowedLiquidityWad),
         liquidityMint
       ),
     [props.reserve, liquidityMint]

src/components/ReserveUtilizationChart/index.tsx

@@ -9,14 +9,14 @@ export const ReserveUtilizationChart = (props: { reserve: LendingReserve }) => {
   const mintAddress = props.reserve.liquidityMint?.toBase58();
   const liquidityMint = useMint(mintAddress);
   const availableLiquidity = fromLamports(
-    props.reserve.availableLiquidity.toNumber(),
+    props.reserve.state.availableLiquidity,
     liquidityMint
   );
 
   const totalBorrows = useMemo(
     () =>
       fromLamports(
-        wadToLamports(props.reserve.borrowedLiquidityWad),
+        wadToLamports(props.reserve.state.borrowedLiquidityWad),
         liquidityMint
       ),
     [props.reserve, liquidityMint]

src/components/SideReserveOverview/index.tsx

@@ -31,7 +31,7 @@ export const SideReserveOverview = (props: {
   const liquidityMint = useMint(reserve.liquidityMint);
 
   const availableLiquidity = fromLamports(
-    reserve.availableLiquidity.toNumber(),
+    reserve.state.availableLiquidity,
     liquidityMint
   );
 

src/constants/math.ts

@@ -1,6 +1,7 @@
 import BN from "bn.js";
 
 export const TEN = new BN(10);
+export const HALF_WAD = TEN.pow(new BN(18));
 export const WAD = TEN.pow(new BN(18));
 export const RAY = TEN.pow(new BN(27));
 export const ZERO = new BN(0);

src/contexts/lending.tsx

@@ -11,7 +11,7 @@ import {
   LendingObligationParser,
 } from './../models/lending';
 import { cache, getMultipleAccounts, MintParser, ParsedAccount } from './accounts';
-import { PublicKey } from '@solana/web3.js';
+import { PublicKey, AccountInfo } from '@solana/web3.js';
 import { DexMarketParser } from '../models/dex';
 import { usePrecacheMarket } from './market';
 import { useLendingReserves } from '../hooks';
@@ -41,7 +41,10 @@ export const useLending = () => {
 
   // TODO: query for all the dex from reserves
 
-  const processAccount = useCallback((item) => {
+  const processAccount = useCallback((item : { pubkey: PublicKey, account: AccountInfo<Buffer> }) => {
+
+    console.log('Account length: ', item.account.data.length);
+
     if (isLendingReserve(item.account)) {
       const reserve = cache.add(item.pubkey.toBase58(), item.account, LendingReserveParser);
 

src/hooks/useCollateralBalance.ts

@@ -57,6 +57,6 @@ export function calculateCollateralBalance(
   reserve: LendingReserve,
   balanceLamports: number) {
   return reserveMarketCap(reserve) *
-    (balanceLamports / (reserve?.collateralMintSupply.toNumber() || 1));
+    (balanceLamports / (reserve?.state.collateralMintSupply.toNumber() || 1));
 }
 

src/models/lending/borrow.ts

@@ -2,10 +2,9 @@ import { PublicKey, SYSVAR_CLOCK_PUBKEY, SYSVAR_RENT_PUBKEY, TransactionInstruct
 import BN from 'bn.js';
 import * as BufferLayout from 'buffer-layout';
 import { TOKEN_PROGRAM_ID, LENDING_PROGRAM_ID } from '../../utils/ids';
-import { wadToLamports } from '../../utils/utils';
 import * as Layout from './../../utils/layout';
 import { LendingInstruction } from './lending';
-import { LendingReserve } from './reserve';
+import { calculateUtilizationRatio, LendingReserve } from './reserve';
 
 export enum BorrowAmountType {
   LiquidityBorrowAmount = 0,
@@ -116,8 +115,7 @@ export const borrowInstruction = (
 // deposit APY utilization currentUtilizationRate * borrowAPY
 
 export const calculateBorrowAPY = (reserve: LendingReserve) => {
-  const totalBorrows = wadToLamports(reserve.borrowedLiquidityWad).toNumber();
+  const currentUtilization = calculateUtilizationRatio(reserve);
-  const currentUtilization = totalBorrows / (reserve.availableLiquidity.toNumber() + totalBorrows);
   const optimalUtilization = reserve.config.optimalUtilizationRate / 100;
 
   let borrowAPY;

src/models/lending/deposit.ts

@@ -2,11 +2,10 @@ import { PublicKey, SYSVAR_CLOCK_PUBKEY, TransactionInstruction } from '@solana/
 import BN from 'bn.js';
 import * as BufferLayout from 'buffer-layout';
 import { TOKEN_PROGRAM_ID, LENDING_PROGRAM_ID } from '../../utils/ids';
-import { wadToLamports } from '../../utils/utils';
 import * as Layout from './../../utils/layout';
 import { calculateBorrowAPY } from './borrow';
 import { LendingInstruction } from './lending';
-import { LendingReserve } from './reserve';
+import { calculateUtilizationRatio, LendingReserve } from './reserve';
 
 /// Deposit liquidity into a reserve. The output is a collateral token representing ownership
 /// of the reserve liquidity pool.
@@ -32,7 +31,10 @@ export const depositInstruction = (
   reserveSupply: PublicKey,
   collateralMint: PublicKey
 ): TransactionInstruction => {
-  const dataLayout = BufferLayout.struct([BufferLayout.u8('instruction'), Layout.uint64('liquidityAmount')]);
+  const dataLayout = BufferLayout.struct([
+    BufferLayout.u8('instruction'), 
+    Layout.uint64('liquidityAmount')
+  ]);
 
   const data = Buffer.alloc(dataLayout.span);
   dataLayout.encode(
@@ -63,8 +65,7 @@ export const depositInstruction = (
 };
 
 export const calculateDepositAPY = (reserve: LendingReserve) => {
-  const totalBorrows = wadToLamports(reserve.borrowedLiquidityWad).toNumber();
+  const currentUtilization = calculateUtilizationRatio(reserve);
-  const currentUtilization = totalBorrows / (reserve.availableLiquidity.toNumber() + totalBorrows);
 
   const borrowAPY = calculateBorrowAPY(reserve);
   return currentUtilization * borrowAPY;

src/models/lending/reserve.ts

@@ -7,23 +7,38 @@ import {
 } from '@solana/web3.js';
 import BN from 'bn.js';
 import * as BufferLayout from 'buffer-layout';
+import { HALF_WAD } from '../../constants';
 import { TOKEN_PROGRAM_ID, LENDING_PROGRAM_ID } from '../../utils/ids';
 import { wadToLamports } from '../../utils/utils';
 import * as Layout from './../../utils/layout';
 import { LendingInstruction } from './lending';
 
 export const LendingReserveLayout: typeof BufferLayout.Structure = BufferLayout.struct([
-  Layout.uint64('lastUpdateSlot'),
+
   Layout.publicKey('lendingMarket'),
   Layout.publicKey('liquidityMint'),
   BufferLayout.u8('liquidityMintDecimals'),
   Layout.publicKey('liquiditySupply'),
   Layout.publicKey('collateralMint'),
   Layout.publicKey('collateralSupply'),
+
+  Layout.publicKey('collateralFeesReceiver'),
+
   // TODO: replace u32 option with generic quivalent
   BufferLayout.u32('dexMarketOption'),
   Layout.publicKey('dexMarket'),
 
+  BufferLayout.struct(
+    [
+      Layout.uint64('lastUpdateSlot'),
+      Layout.uint128('cumulativeBorrowRateWad'),
+      Layout.uint128('borrowedLiquidityWad'),
+      Layout.uint64('availableLiquidity'),
+      Layout.uint64('collateralMintSupply'),
+    ],
+    'state'
+  ),
+
   BufferLayout.struct(
     [
       /// Optimal utilization rate as a percent
@@ -41,39 +56,40 @@ export const LendingReserveLayout: typeof BufferLayout.Structure = BufferLayout.
       /// Max borrow APY
       BufferLayout.u8('maxBorrowRate'),
 
-      /// Fee assessed on `BorrowReserveLiquidity`, expressed as a Wad.
+      BufferLayout.struct(
-      /// Must be between 0 and 10^18, such that 10^18 = 1.  A few examples for
+        [
-      /// clarity:
+          /// Fee assessed on `BorrowReserveLiquidity`, expressed as a Wad.
-      /// 1% = 10_000_000_000_000_000
+          /// Must be between 0 and 10^18, such that 10^18 = 1.  A few examples for
-      /// 0.01% (1 basis point) = 100_000_000_000_000
+          /// clarity:
-      /// 0.00001% (Aave borrow fee) = 100_000_000_000
+          /// 1% = 10_000_000_000_000_000
-      BufferLayout.uint64('borrowFeeWad'),
+          /// 0.01% (1 basis point) = 100_000_000_000_000
+          /// 0.00001% (Aave borrow fee) = 100_000_000_000
+          Layout.uint64('borrowFeeWad'),
 
-      /// Amount of fee going to host account, if provided in liquidate and repay
+          /// Amount of fee going to host account, if provided in liquidate and repay
-      BufferLayout.u8('hostFeePercentage'),
+          BufferLayout.u8('hostFeePercentage'),
+        ],
+        'fees'
+      ),
     ],
     'config'
   ),
 
-  Layout.uint128('cumulativeBorrowRateWad'),
-  Layout.uint128('borrowedLiquidityWad'),
-
-  Layout.uint64('availableLiquidity'),
-  Layout.uint64('collateralMintSupply'),
 ]);
 
 export const isLendingReserve = (info: AccountInfo<Buffer>) => {
+  console.log('Lending Reserve: ', LendingReserveLayout.span)
   return info.data.length === LendingReserveLayout.span;
 };
 
 export interface LendingReserve {
-  lastUpdateSlot: BN;
 
   lendingMarket: PublicKey;
   liquiditySupply: PublicKey;
   liquidityMint: PublicKey;
-  collateralSupply: PublicKey;
   collateralMint: PublicKey;
+  collateralSupply: PublicKey;
+  collateralFeesReceiver: PublicKey;
 
   dexMarketOption: number;
   dexMarket: PublicKey;
@@ -87,21 +103,27 @@ export interface LendingReserve {
     optimalBorrowRate: number;
     maxBorrowRate: number;
 
-    borrowFeeWad: BN;  
+    fees: {
-    hostFeePercentage: number;
+      borrowFeeWad: BN;  
+      hostFeePercentage: number;
+    };
   };
 
-  cumulativeBorrowRateWad: BN;
+  state: {
-  borrowedLiquidityWad: BN;
+    lastUpdateSlot: BN;
+    cumulativeBorrowRateWad: BN;
+    borrowedLiquidityWad: BN;
 
-  availableLiquidity: BN;
+    availableLiquidity: BN;
-  collateralMintSupply: BN;
+    collateralMintSupply: BN;
+  };
 }
 
 export const LendingReserveParser = (pubKey: PublicKey, info: AccountInfo<Buffer>) => {
   const buffer = Buffer.from(info.data);
-  const data = LendingReserveLayout.decode(buffer);
+  const data = LendingReserveLayout.decode(buffer) as LendingReserve;
-  if (data.lastUpdateSlot.toNumber() === 0) return;
+
+  if (data.state.lastUpdateSlot.toNumber() === 0) return;
 
   const details = {
     pubkey: pubKey,
@@ -111,6 +133,8 @@ export const LendingReserveParser = (pubKey: PublicKey, info: AccountInfo<Buffer
     info: data,
   };
 
+  
+
   return details;
 };
 
@@ -176,20 +200,22 @@ export const initReserveInstruction = (
 };
 
 export const calculateUtilizationRatio = (reserve: LendingReserve) => {
-  let borrowedLiquidity = wadToLamports(reserve.borrowedLiquidityWad).toNumber();
+  const totalBorrows = wadToLamports(reserve.state.borrowedLiquidityWad).toNumber();
-  return borrowedLiquidity / (reserve.availableLiquidity.toNumber() + borrowedLiquidity);
+  const currentUtilization = totalBorrows / (reserve.state.availableLiquidity.toNumber() + totalBorrows);
+
+  return currentUtilization;
 };
 
 export const reserveMarketCap = (reserve?: LendingReserve) => {
-  const available = reserve?.availableLiquidity.toNumber() || 0;
+  const available = reserve?.state.availableLiquidity.toNumber() || 0;
-  const borrowed = wadToLamports(reserve?.borrowedLiquidityWad).toNumber();
+  const borrowed = wadToLamports(reserve?.state.borrowedLiquidityWad).toNumber();
   const total = available + borrowed;
 
   return total;
 };
 
 export const collateralExchangeRate = (reserve?: LendingReserve) => {
-  return (reserve?.collateralMintSupply.toNumber() || 1) / reserveMarketCap(reserve);
+  return (reserve?.state.collateralMintSupply.toNumber() || 1) / reserveMarketCap(reserve);
 };
 
 export const collateralToLiquidity = (collateralAmount: BN | number, reserve?: LendingReserve) => {

src/views/home/index.tsx

@@ -51,7 +51,7 @@ export const HomeView = () => {
           marketSize: fromLamports(marketCapLamports, liquidityMint?.info) *
           price,
           borrowed: fromLamports(
-            wadToLamports(item.info?.borrowedLiquidityWad).toNumber(),
+            wadToLamports(item.info?.state.borrowedLiquidityWad).toNumber(),
             liquidityMint.info
           ) *
           price,

src/views/home/item.tsx

@@ -27,14 +27,14 @@ export const LendingReserveItem = (props: {
   const liquidityMint = useMint(props.reserve.liquidityMint);
 
   const availableLiquidity = fromLamports(
-    props.reserve.availableLiquidity.toNumber(),
+    props.reserve.state.availableLiquidity,
     liquidityMint
   );
 
   const totalBorrows = useMemo(
     () =>
       fromLamports(
-        wadToLamports(props.reserve.borrowedLiquidityWad),
+        wadToLamports(props.reserve.state.borrowedLiquidityWad),
         liquidityMint
       ),
     [props.reserve, liquidityMint]