feat: add marginfi-lst adapter (#2390)

Author: 0xkr3p

src/adaptors/marginfi-lst/index.js

@@ -0,0 +1,44 @@
+const axios = require('axios');
+const { getTotalSupply } = require('../utils');
+
+const LST_MINT = 'LSTxxxnJzKDFSLr4dUkPcmCf5VyryEqzPLz5j4bpxFp';
+const priceKey = `solana:${LST_MINT}`;
+const SOL = 'So11111111111111111111111111111111111111112';
+
+const apy = async () => {
+  const [totalSupply, priceRes, apyRes] = await Promise.all([
+    getTotalSupply(LST_MINT),
+    axios.get(`https://coins.llama.fi/prices/current/${priceKey}`),
+    axios.get(
+      `https://extra-api.sanctum.so/v1/apy/latest?lst=${LST_MINT}`
+    ),
+  ]);
+
+  const currentPrice = priceRes.data.coins[priceKey]?.price;
+  if (!currentPrice) throw new Error('Unable to fetch LST price');
+
+  const apyRaw = apyRes?.data?.apys?.[LST_MINT];
+  if (!Number.isFinite(apyRaw))
+    throw new Error(`Unable to fetch APY for ${LST_MINT}`);
+  const apyBase = apyRaw * 100;
+
+  return [
+    {
+      pool: LST_MINT,
+      chain: 'Solana',
+      project: 'marginfi-lst',
+      symbol: 'LST',
+      tvlUsd: totalSupply * currentPrice,
+      apyBase,
+      underlyingTokens: [SOL],
+      token: LST_MINT,
+      poolMeta: '0% rewards fee',
+    },
+  ];
+};
+
+module.exports = {
+  timetravel: false,
+  apy,
+  url: 'https://app.marginfi.com/stake',
+};