From cb0089fa9b9272bc67f5ffdaf594ef7e56578a2e Mon Sep 17 00:00:00 2001
From: Astrit Maliku <45109954+Astrit11@users.noreply.github.com>
Date: Tue, 7 Mar 2023 13:18:30 +0100
Subject: [PATCH] Added smartcredit yield apy (#630)

* Added smartcredit yield apy

* Fixed replacing baseBorrow APY negative value to lower bound value

* Added poolMeta field for locked funds period
---
 src/adaptors/smartcredit/index.js | 86 +++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 src/adaptors/smartcredit/index.js

diff --git a/src/adaptors/smartcredit/index.js b/src/adaptors/smartcredit/index.js
new file mode 100644
index 0000000..0d6b697
--- /dev/null
+++ b/src/adaptors/smartcredit/index.js
@@ -0,0 +1,86 @@
+const utils = require('../utils');
+const { GraphQLClient, gql} = require('graphql-request')
+
+
+const endPoint = 'https://d2c7awq32ho327.cloudfront.net/graphql'
+var graphQLClient = new GraphQLClient(endPoint)
+const SMART_CREDIT = '0x72e9D9038cE484EE986FEa183f8d8Df93f9aDA13'.toLowerCase()
+
+
+const underlyingStats = gql`
+  query {
+    underlyingCurrencies {
+      symbol,
+      name,
+      ethAddress,
+      riskFreeRate,
+      exchangeRate,
+      medianExchangeRate,
+      isUnderlying,
+      isCollateral,
+      decimalPlaces,
+      totalBorrowedAmount,
+      totalBorrowedValueInUSD,
+      totalLendedAmount,
+      totalLendedValueInUSD,
+      maxAPY,
+      minInterestRate,
+      lendersAPY,
+      borrowersAPY
+    }
+  }
+`;
+
+const requiredCollateralRatio = gql`
+  query RequiredCollateralRatio($loanAmount: Float!, $loanTerm: Int!, $loanRequestValidity: DateTime!, $collateralCurrency: String!, $underlyingCurrency: String!, $userRating: Int!) {
+    requiredCollateralRatio(
+      loanAmount: $loanAmount, 
+      loanTerm: $loanTerm, 
+      loanRequestValidity: $loanRequestValidity, 
+      collateralCurrency: $collateralCurrency, 
+      underlyingCurrency: $underlyingCurrency, 
+      userRating: $userRating
+    ) {
+      collateralRatio
+    }
+  }
+`;
+async function getStats(query,variables) {
+  return await graphQLClient.request(query,variables)
+}
+const poolsFunction = async () => {
+  const apyData = await getStats(underlyingStats);
+  const variablesArr = apyData.underlyingCurrencies.map(item => ({
+    loanAmount: 1, //Required param otherwise does not have any impact on the calculation
+    loanTerm: item.symbol === "SMARTCREDIT" ? 90 : 30,
+    loanRequestValidity: new Date(Date.now() + 3 * 24 * 60 * 60 * 1000),
+    collateralCurrency: item.symbol,
+    underlyingCurrency: item.symbol,
+    userRating: 1,   //calculating lower bound(worst credit score)
+  }));
+  const resultArr = await Promise.all(variablesArr.map(variables => getStats(requiredCollateralRatio, variables)));
+  return apyData.underlyingCurrencies.map((item, i) => ({
+    pool: (`${item.ethAddress}-smartcredit`).toLowerCase(),
+    chain: utils.formatChain("Ethereum"),
+    project: "smartcredit",
+    symbol: utils.formatSymbol(item.symbol),
+    tvlUsd: item.totalLendedValueInUSD - item.totalBorrowedValueInUSD,
+    apyBase: Math.floor(item.maxAPY),
+    apyReward: Math.floor(item.lendersAPY),
+    rewardTokens: [SMART_CREDIT],
+    underlyingTokens: [(item.ethAddress).toLowerCase()],
+    poolMeta:item.symbol === "SMARTCREDIT" ? '90-180 days' : '30-90 days',
+    apyBaseBorrow: Math.floor(item.minInterestRate),
+    apyRewardBorrow: Math.floor(item.borrowersAPY),
+    totalSupplyUsd: item.totalLendedValueInUSD,
+    totalBorrowUsd: item.totalBorrowedValueInUSD,
+    ltv: (resultArr[i].requiredCollateralRatio.collateralRatio / 1000)
+  }));
+};
+
+
+module.exports = {
+  timetravel: false,
+  apy: poolsFunction,
+    url: 'https://appv2.smartcredit.io',
+};
\ No newline at end of file