feat: liquidations

src/components/Layout/index.tsx

@@ -6,7 +6,7 @@ import {
   GithubOutlined,
   BankOutlined,
   LogoutOutlined,
-  LoginOutlined,
+  ShoppingOutlined,
   HomeOutlined,
   RocketOutlined,
 } from "@ant-design/icons";
@@ -94,7 +94,7 @@ export const AppLayout = (props: any) => {
                   {LABELS.MENU_BORROW}
                 </Link>
               </Menu.Item>
-              <Menu.Item key="5" icon={<LoginOutlined />}>
+              <Menu.Item key="5" icon={<ShoppingOutlined />}>
                 <Link
                   to={{
                     pathname: "/liquidate",

src/components/LiquidateInput/index.tsx

@@ -12,12 +12,11 @@ import "./style.less";
 export const LiquidateInput = (props: {
   className?: string;
   reserve: ParsedAccount<LendingReserve>;
+  collateralReserve?: ParsedAccount<LendingReserve>;
   obligation: ParsedAccount<LendingObligation>;
 }) => {
 
-  const { reserve } = props;
-
-  const [collateralReserveMint, setCollateralReserveMint] = useState<string>();
+  const { reserve, collateralReserve } = props;
   const [pendingTx, setPendingTx] = useState(false);
 
   const onLiquidate = useCallback(() => {
@@ -43,8 +42,8 @@ export const LiquidateInput = (props: {
         <div className="liquidate-input-title">{LABELS.SELECT_COLLATERAL}</div>
         <CollateralSelector
           reserve={reserve.info}
-          mint={collateralReserveMint}
-          onMintChange={setCollateralReserveMint}
+          collateralReserve={collateralReserve?.pubkey.toBase58()}
+          disabled={true}
         />
         <Button
           type="primary"

src/contexts/market.tsx

@@ -2,14 +2,14 @@ import React, { useCallback, useContext, useEffect, useState } from "react";
 import { MINT_TO_MARKET } from "./../models/marketOverrides";
 import { STABLE_COINS } from "./../utils/utils";
 import { useConnectionConfig } from "./connection";
-import { cache, getMultipleAccounts } from "./accounts";
+import { cache, getMultipleAccounts, ParsedAccount } from "./accounts";
 import { Market, MARKETS, Orderbook, TOKEN_MINTS } from "@project-serum/serum";
 import { AccountInfo, Connection, PublicKey } from "@solana/web3.js";
 import { useMemo } from "react";
 import { EventEmitter } from "./../utils/eventEmitter";
 
 import { DexMarketParser } from "./../models/dex";
-import { LendingReserve } from "../models";
+import { LendingMarket, LendingReserve } from "../models";
 
 export interface MarketsContextState {
   midPriceInUSD: (mint: string) => number;
@@ -261,7 +261,11 @@ export const simulateMarketOrderFill = (amount: number, reserve: LendingReserve)
   const quoteMintDecimals =
     cache.get(decodedMarket.quoteMint)?.info.decimals || 0;
 
-  const market = new Market(
+  const lendingMarket = cache.get(reserve.lendingMarket) as ParsedAccount<
+    LendingMarket
+  >;
+
+  const dexMarket = new Market(
     decodedMarket,
     baseMintDecimals,
     quoteMintDecimals,
@@ -269,19 +273,23 @@ export const simulateMarketOrderFill = (amount: number, reserve: LendingReserve)
     decodedMarket.programId
   );
 
-  const bids = cache.get(decodedMarket.bids)?.info;
-  const asks = cache.get(decodedMarket.asks)?.info;
+  const bookAccount = lendingMarket.info.quoteMint.equals(
+    reserve.liquidityMint
+  )
+    ? decodedMarket?.bids
+    : decodedMarket?.asks;
 
-  if (bids && asks) {
-    const bidsBook = new Orderbook(market, bids.accountFlags, bids.slab);
-    const asksBook = new Orderbook(market, asks.accountFlags, asks.slab);
+  const bookInfo = cache.get(bookAccount)?.info;
+  if (!bookInfo) {
+    return 0;
+  }
 
-    // TODO: pick side
-    let book = bidsBook;
+  const book = new Orderbook(dexMarket, bookInfo.accountFlags, bookInfo.slab);
 
   let cost = 0;
   let remaining = amount;
 
+  if (book) {
     for (const level of book) {
       let size = remaining > level.size ? level.size : level.size - remaining;
       cost = cost + level.price * size;
@@ -291,11 +299,9 @@ export const simulateMarketOrderFill = (amount: number, reserve: LendingReserve)
         break;
       }
     }
-
-    return cost;
   }
 
-  return 0;
+  return cost;
 }
 
 const getMidPrice = (marketAddress?: string, mintAddress?: string) => {

src/hooks/useLiquidableObligations.ts

@@ -1,8 +1,10 @@
 import { useMemo } from "react";
 import { useLendingObligations } from "./useLendingObligations";
-import { LendingReserve } from "../models/lending";
+import { collateralToLiquidity, LendingReserve } from "../models/lending";
 import { useLendingReserves } from "./useLendingReserves";
 import { ParsedAccount } from "../contexts/accounts";
+import { wadToLamports } from "../utils/utils";
+import { simulateMarketOrderFill } from "../contexts/market";
 
 export const useLiquidableObligations = () => {
   const { obligations } = useLendingObligations();
@@ -27,8 +29,16 @@ export const useLiquidableObligations = () => {
           reserve: availableReserves.get(obligation.info.borrowReserve.toBase58()) as ParsedAccount<LendingReserve>
         }
       ))
+      // use obligations with reserves available
       .filter(item => item.reserve)
+      // use reserves with borrow amount greater than zero
+      .filter(item => wadToLamports(item.obligation.info.borrowAmountWad).toNumber() > 0)
       .map(item => {
+        const obligation = item.obligation;
+        const reserve  = item.reserve.info;
+        const collateralLamports = collateralToLiquidity(obligation.info.depositedCollateral, reserve);
+        const cost = simulateMarketOrderFill(collateralLamports, reserve);
+
         // TODO: calculate LTV 
         const ltv = 81;
         const liquidationThreshold = item.reserve.info.config.liquidationThreshold;

src/views/dashboard/obligationItem.tsx

@@ -51,22 +51,6 @@ export const ObligationItem = (props: {
   const borrowName = useTokenName(borrowReserve?.info.liquidityMint);
   const collateralName = useTokenName(collateralReserve?.info.liquidityMint);
 
-
-  const cost = simulateMarketOrderFill(collateralLamports, borrowReserve.info);
-  console.log(cost);
-
-  // TODO: health factor
-//   let borrow_amount_as_collateral = withdraw_reserve_rates.liquidity_to_collateral(
-//     simulate_market_order_fill(
-//         obligation.borrowed_liquidity_wads,
-//         memory,
-//         dex_market_order_book_side_info,
-//         dex_market_info,
-//         &repay_reserve,
-//     )?
-//     .round_u64(),
-// );
-
   return (
     <Card>
       <div className="dashboard-item">

src/views/liquidate/item.tsx

@@ -20,7 +20,14 @@ export const LiquidateItem = (props: {
 
   const { obligation, ltv } = props;
 
-  const borrowReserve = cache.get(obligation.info.borrowReserve) as ParsedAccount<LendingReserve>;
+  const borrowReserve = cache.get(
+    obligation.info.borrowReserve
+  ) as ParsedAccount<LendingReserve>;
+
+  const collateralReserve = cache.get(
+    obligation.info.collateralReserve
+  ) as ParsedAccount<LendingReserve>;
+  
   const tokenName = useTokenName(borrowReserve?.info.liquidityMint);
   const liquidityMint = useMint(borrowReserve.info.liquidityMint);
 
@@ -33,13 +40,24 @@ export const LiquidateItem = (props: {
     borrowReserve,
   ]);
 
+  const borrowName = useTokenName(borrowReserve?.info.liquidityMint);
+  const collateralName = useTokenName(collateralReserve?.info.liquidityMint);
+
   return (
     <Link to={`/liquidate/${obligation.pubkey.toBase58()}`}>
       <Card>
         <div className="liquidate-item">
           <span style={{ display: "flex" }}>
-            <TokenIcon mintAddress={borrowReserve.info.liquidityMint} />
-            {tokenName}
+            <div style={{ display: "flex" }}>
+              <TokenIcon
+                mintAddress={collateralReserve?.info.liquidityMint}
+                style={{ marginRight: "-0.5rem" }}
+              />
+              <TokenIcon mintAddress={borrowReserve?.info.liquidityMint} />
+            </div>
+            {collateralName}
+          /
+          {borrowName}
           </span>
           <div>
             {formatNumber.format(borrowAmount)} {tokenName}

src/views/liquidateReserve/index.tsx

@@ -15,6 +15,7 @@ export const LiquidateReserveView = () => {
 
   const obligation = useLendingObligation(id);
   const reserve = useLendingReserve(obligation?.info.borrowReserve);
+  const collateralReserve = useLendingReserve(obligation?.info.collateralReserve);
 
   if (!obligation || !reserve) {
     return null;
@@ -26,6 +27,7 @@ export const LiquidateReserveView = () => {
         <LiquidateInput
           className="liquidate-reserve-item liquidate-reserve-item-left"
           obligation={obligation}
+          collateralReserve={collateralReserve}
           reserve={reserve}
         />
         <SideReserveOverview