Merge pull request #2163 from Avant-Protocol/master

APY adapter for avUSD, avBTC and avETH

Author: slasher125

src/adaptors/avant-avbtc/index.js

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+const { getData } = require('../avant-aveth/shared')
+
+// Avalanche tokens
+const avBTC  = '0xfd2c2A98009d0cBed715882036e43d26C4289053'
+const savBTC = '0x649342c6bff544d82DF1B2bA3C93e0C22cDeBa84' // Staked avBTC (ERC-4626)
+
+async function apy() {
+  const savBTCData = await getData('avax', savBTC, avBTC)
+
+  return [
+    {
+      pool: `${savBTC}-avax`,
+      chain: 'avax',
+      project: 'avant-avbtc',
+      symbol: 'savBTC',
+      tvlUsd: savBTCData.tvlUsd,
+      apyBase: savBTCData.apyBase,
+      underlyingTokens: [avBTC],
+      poolMeta: 'ERC-4626: savBTC → avBTC',
+      url: 'https://www.avantprotocol.com',
+    },
+  ]
+}
+
+module.exports = {
+  timetravel: false,
+  apy,
+  url: 'https://www.avantprotocol.com',
+}

src/adaptors/avant-aveth/index.js

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+const { getData } = require('./shared')
+
+// Ethereum tokens
+const avETH  = '0x9469470C9878bf3d6d0604831d9A3A366156f7EE'
+const savETH = '0xDA06eE2dACF9245Aa80072a4407deBDea0D7e341' // Staked avETH (ERC-4626)
+const wETH   = '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2'
+
+async function apy() {
+  const savETHData = await getData('ethereum', savETH, avETH, wETH)
+
+  return [
+    {
+      pool: `${savETH}-ethereum`,
+      chain: 'ethereum',
+      project: 'avant-aveth',
+      symbol: 'savETH',
+      tvlUsd: savETHData.tvlUsd,
+      apyBase: savETHData.apyBase,
+      underlyingTokens: [avETH],
+      poolMeta: 'ERC-4626: savETH → avETH',
+      url: 'https://www.avantprotocol.com',
+    },
+  ]
+}
+
+module.exports = {
+  timetravel: false,
+  apy,
+  url: 'https://www.avantprotocol.com',
+}

src/adaptors/avant-aveth/shared.js

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+const sdk   = require('@defillama/sdk')
+const axios = require('axios')
+const utils = require('../utils')
+
+const abi = {
+  convertToAssets: { "inputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"name":"convertToAssets","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function" },
+  totalAssets:     { "inputs":[],"name":"totalAssets","outputs":[{"internalType":"uint256","name":"" ,"type":"uint256"}],"stateMutability":"view","type":"function" },
+}
+
+const DAY    = 86_400
+const SCALE  = BigInt(1e18)
+const SHARES = BigInt(1e18)
+
+async function getBlockAtTimestamp(chain, ts) {
+  const { data } = await axios.get(`https://coins.llama.fi/block/${chain}/${ts}`)
+  return { block: data.height || data.number, ts: data.timestamp || ts }
+}
+
+async function readShareToAssetRatio(chain, blockNumber, vault) {
+  const { output } = await sdk.api.abi.call({
+    target: vault,
+    abi: abi.convertToAssets,
+    params: [SHARES.toString()],
+    chain,
+    block: blockNumber,
+  })
+  return BigInt(output)
+}
+
+function ratioToDaily(rNow, rPrev, secondsBigOrNum) {
+  if (rPrev === 0n || rNow === 0n) return 0
+  const qFP = (rNow * SCALE) / rPrev
+  const q = Number(qFP) / Number(SCALE)
+  if (!(q > 0) || !isFinite(q)) return 0
+  const seconds = Number(secondsBigOrNum) || 1
+  const exp = DAY / seconds
+  return Math.pow(q, exp) - 1
+}
+
+async function computeApyBase(chain, vault) {
+  const nowTs = Math.floor(Date.now() / 1e3)
+  const WEEK = 7 * DAY
+
+  const [{ block: bNow, ts: tNow }, { block: bPast, ts: tPast }] = await Promise.all([
+    getBlockAtTimestamp(chain, nowTs),
+    getBlockAtTimestamp(chain, nowTs - WEEK),
+  ])
+
+  const [rNow, rPast] = await Promise.all([
+    readShareToAssetRatio(chain, bNow, vault),
+    readShareToAssetRatio(chain, bPast, vault)
+  ])
+  if (rNow === 0n || rPast === 0n || rNow === rPast) return 0
+
+  const daily = ratioToDaily(rNow, rPast, Math.max(1, tNow - tPast))
+  if (!daily) return 0
+
+  const aprBase = daily * 365 * 100
+  return utils.aprToApy(aprBase, 365) // number
+}
+
+async function getPrice(chain, token, tokenSubstitute) {
+  async function _getPrice(chain, tokenAddress) {
+    const priceKey = `${chain}:${tokenAddress}`
+    const { data } = await axios.get(`https://coins.llama.fi/prices/current/${priceKey}`)
+    price = data.coins?.[priceKey]?.price ?? 0
+    return price
+  }
+  const price = await _getPrice(chain, token)
+  if (price) {
+    return price
+  } else if (tokenSubstitute) {
+    return await _getPrice(chain, tokenSubstitute)
+  }
+  return 1
+}
+
+async function getData(chain, vault, underlying, underlyingSubstitute = undefined) {
+  const { output: totalAssetsBn } = await sdk.api.abi.call({
+    target: vault,
+    abi: abi.totalAssets,
+    chain,
+  })
+
+  const price = await getPrice(chain, underlying, underlyingSubstitute)
+  const tvlUsd = (Number(totalAssetsBn) / 1e18) * price
+  const apyBase = await computeApyBase(chain, vault)
+
+  return { tvlUsd, apyBase }
+}
+
+module.exports = {
+  getData,
+}

src/adaptors/avant-avusd/index.js

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+const { getData } = require('../avant-aveth/shared')
+
+// Avalanche tokens
+const avUSD  = '0x24dE8771bC5DdB3362Db529Fc3358F2df3A0E346'
+const savUSD = '0x06d47F3fb376649c3A9Dafe069B3D6E35572219E' // Staked avUSD (ERC-4626)
+
+async function apy() {
+  const savUSDData = await getData('avax', savUSD, avUSD)
+
+  return [
+    {
+      pool: `${savUSD}-avax`,
+      chain: 'avax',
+      project: 'avant-avusd',
+      symbol: 'savUSD',
+      tvlUsd: savUSDData.tvlUsd,
+      apyBase: savUSDData.apyBase,
+      underlyingTokens: [avUSD],
+      poolMeta: 'ERC-4626: savUSD → avUSD',
+      url: 'https://www.avantprotocol.com',
+    },
+  ]
+}
+
+module.exports = {
+  timetravel: false,
+  apy,
+  url: 'https://www.avantprotocol.com',
+}