tvl and apy support for sceptre liquid sflr staking pool

src/adaptors/sceptre-liquid/index.js

@@ -0,0 +1,96 @@
+const sdk = require('@defillama/sdk');
+const BigNumber = require('bignumber.js');
+const { formatChain } = require('../utils');
+const axios = require('axios');
+
+const CONFIG = {
+  SFLR_ADDRESS: '0x12e605bc104e93b45e1ad99f9e555f659051c2bb',
+  WFLR_ADDRESS: '0x1D80c49BbBCd1C0911346656B529DF9E5c2F783d',
+  FLARE_CHAIN: 'flare',
+  PRICE_API: 'https://coins.llama.fi/prices/current',
+  REWARDS_API: 'https://rewards.sceptre.fi/v1/flare',
+  TIMEOUT_MS: 10000,
+  RETRY_ATTEMPTS: 3,
+  RETRY_DELAY_MS: 1000,
+};
+
+const ABI = {
+  totalPooledFlr: {
+    inputs: [],
+    name: 'totalPooledFlr',
+    outputs: [{ type: 'uint256' }],
+    stateMutability: 'view',
+    type: 'function',
+  },
+};
+
+async function fetchWithRetry(url, options = {}) {
+  for (let i = 0; i < CONFIG.RETRY_ATTEMPTS; i++) {
+    try {
+      const response = await axios.get(url, {
+        timeout: CONFIG.TIMEOUT_MS,
+        ...options
+      });
+      return response.data;
+    } catch (error) {
+      if (i === CONFIG.RETRY_ATTEMPTS - 1) throw error;
+      await new Promise(resolve => setTimeout(resolve, CONFIG.RETRY_DELAY_MS * Math.pow(2, i)));
+    }
+  }
+}
+
+async function fetchTotalPooledFlr() {
+  const { output } = await sdk.api.abi.call({
+    target: CONFIG.SFLR_ADDRESS,
+    abi: ABI.totalPooledFlr,
+    chain: CONFIG.FLARE_CHAIN,
+  });
+  return new BigNumber(output);
+}
+
+async function fetchFlarePrice() {
+  const priceKey = `${CONFIG.FLARE_CHAIN}:${CONFIG.WFLR_ADDRESS.toLowerCase()}`;
+  const pricesResponse = await fetchWithRetry(`${CONFIG.PRICE_API}/${priceKey}`);
+  return new BigNumber(pricesResponse.coins[priceKey].price);
+}
+
+function calculateTvl(totalPooledFlr, flarePrice) {
+  return totalPooledFlr.dividedBy(1e18).multipliedBy(flarePrice);
+}
+
+async function fetchStakingApy() {
+  const apyResponse = await fetchWithRetry(CONFIG.REWARDS_API);
+  return new BigNumber(apyResponse.apy);
+}
+
+async function main() {
+  try {
+    const [totalPooledFlr, flarePrice, stakingApy] = await Promise.all([
+      fetchTotalPooledFlr(),
+      fetchFlarePrice(),
+      fetchStakingApy(),
+    ]);
+
+    const tvlUsd = calculateTvl(totalPooledFlr, flarePrice);
+
+    return [{
+      pool: CONFIG.SFLR_ADDRESS,
+      chain: formatChain(CONFIG.FLARE_CHAIN),
+      project: 'sceptre-liquid',
+      symbol: 'sFLR',
+      tvlUsd: tvlUsd.toNumber(),
+      apyBase: stakingApy.multipliedBy(100).toNumber(),
+      underlyingTokens: [CONFIG.WFLR_ADDRESS],
+      poolMeta: 'Unstaking Cooldown: 14.5days'
+    }];
+  } catch (error) {
+    console.error('Error fetching data:', error.message);
+    throw new Error(`Failed to fetch data: ${error.message}`);
+  }
+}
+
+module.exports = {
+  timetravel: false,
+  apy: main,
+  url: 'https://flare.sceptre.fi/',
+};