From 34e57f8d399a0f93fad53a931e35280494faac38 Mon Sep 17 00:00:00 2001
From: Sam MacPherson <xylom44@gmail.com>
Date: Sun, 9 Jan 2022 12:29:44 -0500
Subject: [PATCH] add UST as borrow-only collateral

---
 helpers/constants.ts            |  1 +
 helpers/types.ts                |  3 +++
 markets/aave/commons.ts         |  3 +++
 markets/aave/index.ts           |  6 ++++++
 markets/aave/reservesConfigs.ts | 12 ++++++++++++
 5 files changed, 25 insertions(+)

diff --git a/helpers/constants.ts b/helpers/constants.ts
index 26e2c611f..5c2c93607 100644
--- a/helpers/constants.ts
+++ b/helpers/constants.ts
@@ -49,6 +49,7 @@ export const MOCK_CHAINLINK_AGGREGATORS_PRICES = {
   UNI: oneEther.multipliedBy('0.00536479').toFixed(),
   USDC: oneEther.multipliedBy('0.00367714136416').toFixed(),
   USDT: oneEther.multipliedBy('0.00369068412860').toFixed(),
+  UST: oneEther.multipliedBy('0.00369068412860').toFixed(),
   WETH: oneEther.toFixed(),
   WBTC: oneEther.multipliedBy('47.332685').toFixed(),
   YFI: oneEther.multipliedBy('22.407436').toFixed(),
diff --git a/helpers/types.ts b/helpers/types.ts
index 71597f9c3..f251b2da8 100644
--- a/helpers/types.ts
+++ b/helpers/types.ts
@@ -255,6 +255,7 @@ export interface iAssetBase<T> {
   STAKE: T;
   xSUSHI: T;
   WAVAX: T;
+  UST: T;
 }
 
 export type iAssetsWithoutETH<T> = Omit<iAssetBase<T>, 'ETH'>;
@@ -284,6 +285,7 @@ export type iAavePoolAssets<T> = Pick<
   | 'REN'
   | 'ENJ'
   | 'xSUSHI'
+  | 'UST'
 >;
 
 export type iLpPoolAssets<T> = Pick<
@@ -374,6 +376,7 @@ export enum TokenContractId {
   STAKE = 'STAKE',
   xSUSHI = 'xSUSHI',
   WAVAX = 'WAVAX',
+  UST = 'UST',
 }
 
 export interface IReserveParams extends IReserveBorrowParams, IReserveCollateralParams {
diff --git a/markets/aave/commons.ts b/markets/aave/commons.ts
index d0a34bcdb..b95a874a2 100644
--- a/markets/aave/commons.ts
+++ b/markets/aave/commons.ts
@@ -99,6 +99,9 @@ export const CommonsConfig: ICommonConfiguration = {
     BUSD: {
       borrowRate: oneRay.multipliedBy(0.05).toFixed(),
     },
+    UST: {
+      borrowRate: oneRay.multipliedBy(0.05).toFixed(),
+    },
   },
   // ----------------
   // COMMON PROTOCOL ADDRESSES ACROSS POOLS
diff --git a/markets/aave/index.ts b/markets/aave/index.ts
index 72f251526..aee6f6c83 100644
--- a/markets/aave/index.ts
+++ b/markets/aave/index.ts
@@ -24,6 +24,7 @@ import {
   strategyYFI,
   strategyXSUSHI,
   strategyENJ,
+  strategyUST,
 } from './reservesConfigs';
 
 // ----------------
@@ -56,6 +57,7 @@ export const AaveConfig: IAaveConfiguration = {
     YFI: strategyYFI,
     ZRX: strategyZRX,
     xSUSHI: strategyXSUSHI,
+    UST: strategyUST,
   },
   ReserveAssets: {
     [eEthereumNetwork.buidlerevm]: {},
@@ -78,6 +80,7 @@ export const AaveConfig: IAaveConfiguration = {
       UNI: '0x075A36BA8846C6B6F53644fDd3bf17E5151789DC',
       USDC: '0xe22da380ee6B445bb8273C81944ADEB6E8450422',
       USDT: '0x13512979ADE267AB5100878E2e0f485B568328a4',
+      UST: ZERO_ADDRESS,
       WBTC: '0xD1B98B6607330172f1D991521145A22BCe793277',
       WETH: '0xd0a1e359811322d97991e03f863a0c30c2cf029c',
       YFI: '0xb7c325266ec274fEb1354021D27FA3E3379D840d',
@@ -100,6 +103,7 @@ export const AaveConfig: IAaveConfiguration = {
       UNI: ZERO_ADDRESS,
       USDC: '0x851dEf71f0e6A903375C1e536Bd9ff1684BAD802',
       USDT: '0xB404c51BBC10dcBE948077F18a4B8E553D160084',
+      UST: ZERO_ADDRESS,
       WBTC: '0xa0E54Ab6AA5f0bf1D62EC3526436F3c05b3348A0',
       WETH: '0xc778417e063141139fce010982780140aa0cd5ab',
       YFI: ZERO_ADDRESS,
@@ -122,6 +126,7 @@ export const AaveConfig: IAaveConfiguration = {
       UNI: '0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984',
       USDC: '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48',
       USDT: '0xdAC17F958D2ee523a2206206994597C13D831ec7',
+      UST: '0xa47c8bf37f92aBed4A126BDA807A7b7498661acD',
       WBTC: '0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599',
       WETH: '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2',
       YFI: '0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e',
@@ -145,6 +150,7 @@ export const AaveConfig: IAaveConfiguration = {
       UNI: '0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984',
       USDC: '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48',
       USDT: '0xdAC17F958D2ee523a2206206994597C13D831ec7',
+      UST: '0xa47c8bf37f92aBed4A126BDA807A7b7498661acD',
       WBTC: '0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599',
       WETH: '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2',
       YFI: '0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e',
diff --git a/markets/aave/reservesConfigs.ts b/markets/aave/reservesConfigs.ts
index 06a3bf9de..4d760326b 100644
--- a/markets/aave/reservesConfigs.ts
+++ b/markets/aave/reservesConfigs.ts
@@ -84,6 +84,18 @@ export const strategyUSDT: IReserveParams = {
   reserveFactor: '1000',
 };
 
+export const strategyUST: IReserveParams = {
+  strategy: rateStrategyStableThree,
+  baseLTVAsCollateral: '0',
+  liquidationThreshold: '0',
+  liquidationBonus: '0',
+  borrowingEnabled: true,
+  stableBorrowRateEnabled: false,
+  reserveDecimals: '18',
+  aTokenImpl: eContractid.AToken,
+  reserveFactor: '1000',
+};
+
 export const strategyAAVE: IReserveParams = {
   strategy: rateStrategyAAVE,
   baseLTVAsCollateral: '5000',