Add YieldNest adaptor (#1698)

* Add yieldnest adaptor

* Remove unused imports and constants

src/adaptors/yieldnest/index.js

@@ -0,0 +1,80 @@
+const { request, gql } = require('graphql-request');
+
+const yieldnestGatewayUrl = 'https://gateway.yieldnest.finance/api/v1/graphql';
+const yieldnestRestakePoolBaseUrl = 'https://app.yieldnest.finance/restake/';
+const chainIdToName = {
+  1: 'Ethereum',
+  56: 'Binance',
+};
+const yieldnestSummaryQuery = gql`
+{
+  getLRTsData(networkType: mainnet) {
+    tokens {
+      token
+      blockchains {
+        chainId
+        apr {
+          apr7d
+          restaking7dApr
+        }
+        contract_details {
+          tokenAddress
+        }
+        tvl {
+          value_usd
+        }
+      }
+    }
+  }
+}`
+
+const yieldnestUnderlyingAssetsQuery = gql`
+query lrt($chainId: Int!, $token: TOKENS!) {
+  getAPRLRT(chainId: $chainId, token: $token) {
+    underlyingAssets {
+      address
+    }
+  }
+}`
+
+const getUnderlyingAssets = async (chainId, token) => {
+  try {
+    const data = await request(yieldnestGatewayUrl, yieldnestUnderlyingAssetsQuery, { chainId, token });
+
+    return data.getAPRLRT.underlyingAssets.map((asset) => asset.address);
+  } catch (error) {
+    return [];
+  }
+}
+
+const apy = async () => {
+  const data = await request(yieldnestGatewayUrl, yieldnestSummaryQuery);
+  const tokens = data.getLRTsData.tokens;
+
+  const pools = await Promise.all(tokens.map(async (token) => {
+    const blockchainData = token.blockchains[0];
+    if (!blockchainData) return;
+    const chain = chainIdToName[blockchainData.chainId];
+    if (!chain) return;
+    const address = blockchainData.contract_details.tokenAddress;
+    const symbol = token.token;
+    const decimals = 18;
+    const apy = blockchainData.apr.apr7d + blockchainData.apr.restaking7dApr;
+    const tvl = blockchainData.tvl.value_usd;
+    const underlyingAssets = await getUnderlyingAssets(blockchainData.chainId, token.token);
+    return {
+      pool: `${address}-${chain}`.toLowerCase(),
+      chain: chain,
+      project: 'yieldnest',
+      symbol: symbol,
+      tvlUsd: tvl,
+      apy: apy,
+      underlyingTokens: underlyingAssets,
+      url: `${yieldnestRestakePoolBaseUrl}${symbol}`,
+    };
+  }));
+
+  return pools;
+};
+
+module.exports = { timetravel: false, apy };