add mezo vaults

src/adaptors/mezo-vaults/index.js

@@ -0,0 +1,156 @@
+const sdk = require('@defillama/sdk');
+const utils = require('../utils');
+
+const CHAIN = 'mezo';
+const PROJECT = 'mezo-vaults';
+const URL = 'https://mezo.org/earn/vaults';
+
+const VAULT = '0xb4D498029af77680cD1eF828b967f010d06C51CC';
+const STRATEGY = '0x0C0944713c185ea3e64F5609ECee3fB3C054a295';
+const GAUGE = '0x677817bF3e44b90E8F95222F75e2950b7904a401';
+const MUSD = '0xdD468A1DDc392dcdbEf6db6e34E89AA338F9F186';
+
+const SECONDS_PER_BLOCK = 2;
+const SECONDS_PER_DAY = 86400;
+const SECONDS_PER_YEAR = 365 * SECONDS_PER_DAY;
+const YIELD_INDEX_SCALE = 1e18;
+const TOKEN_DECIMALS = 18;
+const LOOKBACK_WINDOWS_DAYS = [7, 3];
+
+const weiToNumber = (wei) => Number(wei) / 10 ** TOKEN_DECIMALS;
+
+const viewAbi = (name, outType) => ({
+  inputs: [],
+  name,
+  outputs: [{ type: outType }],
+  stateMutability: 'view',
+  type: 'function',
+});
+
+const yieldIndexAbi = viewAbi('yieldIndex', 'uint256');
+
+const computeBaseApr = async (currentIndex, latestBlock) => {
+  for (const days of LOOKBACK_WINDOWS_DAYS) {
+    const olderBlock =
+      latestBlock - Math.floor((SECONDS_PER_DAY * days) / SECONDS_PER_BLOCK);
+    try {
+      const res = await sdk.api.abi.call({
+        target: VAULT,
+        abi: yieldIndexAbi,
+        chain: CHAIN,
+        block: olderBlock,
+      });
+      const oldIndex = Number(res.output);
+      if (oldIndex > 0 && currentIndex > oldIndex) {
+        const yieldPerShare = (currentIndex - oldIndex) / YIELD_INDEX_SCALE;
+        return yieldPerShare * (365 / days) * 100;
+      }
+    } catch {}
+  }
+  return null;
+};
+
+const getApy = async () => {
+  const [
+    yieldIndexRes,
+    vaultBalRes,
+    strategyBalRes,
+    vaultSupplyRes,
+    gaugeStakedRes,
+    rewardTokenRes,
+    rewardRateRes,
+    periodFinishRes,
+    latestBlock,
+  ] = await Promise.all([
+    sdk.api.abi.call({ target: VAULT, abi: yieldIndexAbi, chain: CHAIN }),
+    sdk.api.erc20.balanceOf({ target: MUSD, owner: VAULT, chain: CHAIN }),
+    sdk.api.erc20.balanceOf({ target: MUSD, owner: STRATEGY, chain: CHAIN }),
+    sdk.api.erc20.totalSupply({ target: VAULT, chain: CHAIN }),
+    sdk.api.abi.call({
+      target: GAUGE,
+      abi: viewAbi('totalSupply', 'uint256'),
+      chain: CHAIN,
+    }),
+    sdk.api.abi.call({
+      target: GAUGE,
+      abi: viewAbi('rewardToken', 'address'),
+      chain: CHAIN,
+    }),
+    sdk.api.abi.call({
+      target: GAUGE,
+      abi: viewAbi('rewardRate', 'uint256'),
+      chain: CHAIN,
+    }),
+    sdk.api.abi.call({
+      target: GAUGE,
+      abi: viewAbi('periodFinish', 'uint256'),
+      chain: CHAIN,
+    }),
+    sdk.api.util.getLatestBlock(CHAIN),
+  ]);
+
+  const rewardToken = rewardTokenRes.output;
+  const priceData = await utils.getPrices([MUSD, rewardToken], CHAIN);
+  const musdPrice = priceData.pricesByAddress[MUSD.toLowerCase()] ?? 1;
+  const rewardPrice = priceData.pricesByAddress[rewardToken.toLowerCase()] ?? 0;
+
+  const totalAssetsWei =
+    BigInt(vaultBalRes.output) + BigInt(strategyBalRes.output);
+  const totalSupplyWei = BigInt(vaultSupplyRes.output);
+  const gaugeStakedWei = BigInt(gaugeStakedRes.output);
+  const unstakedWei =
+    totalSupplyWei > gaugeStakedWei ? totalSupplyWei - gaugeStakedWei : 0n;
+
+  const allocateTvl = (shareWei) => {
+    if (totalSupplyWei === 0n) return 0;
+    const allocWei = (totalAssetsWei * shareWei) / totalSupplyWei;
+    return weiToNumber(allocWei) * musdPrice;
+  };
+
+  const currentIndex = Number(yieldIndexRes.output);
+  const apyBase = await computeBaseApr(currentIndex, latestBlock.number);
+
+  const stakedTvlUsd = allocateTvl(gaugeStakedWei);
+  const rewardRate = weiToNumber(BigInt(rewardRateRes.output));
+  const periodFinish = Number(periodFinishRes.output);
+  const isActive = periodFinish > Math.floor(Date.now() / 1000);
+  const annualRewardUsd = rewardRate * SECONDS_PER_YEAR * rewardPrice;
+  const apyReward =
+    isActive && stakedTvlUsd > 0 ? (annualRewardUsd / stakedTvlUsd) * 100 : 0;
+
+  const pools = [
+    {
+      pool: `${VAULT.toLowerCase()}-${CHAIN}}`,
+      chain: utils.formatChain(CHAIN),
+      project: PROJECT,
+      symbol: 'sMUSD',
+      tvlUsd: allocateTvl(unstakedWei),
+      apyBase,
+      underlyingTokens: [MUSD],
+      pricePerShare: 1,
+      url: URL,
+    },
+    {
+      pool: `${GAUGE.toLowerCase()}-${CHAIN}}`,
+      chain: utils.formatChain(CHAIN),
+      project: PROJECT,
+      symbol: 'sMUSD',
+      poolMeta: 'Staked in gauge',
+      tvlUsd: stakedTvlUsd,
+      apyBase: 0,
+      apyReward,
+      rewardTokens: [rewardToken],
+      underlyingTokens: [MUSD],
+      pricePerShare: 1,
+      url: URL,
+    },
+  ];
+
+  return pools.filter(utils.keepFinite);
+};
+
+module.exports = {
+  timetravel: false,
+  apy: getApy,
+  url: URL,
+};