feat: add yusan.fi

projects/yusan/index.js

@@ -0,0 +1,90 @@
+const { getCache } = require('../helper/http')
+
+const YUSAN_API = 'https://yusan.fi/metrics_json'
+const ONESEC_API = 'https://1sec.to/api/balances'
+
+const tokens = {
+  ICP: { decimals: 8, coingeckoId: 'internet-computer' },
+  USDC: { decimals: 6, coingeckoId: 'usd-coin' },
+  USDT: { decimals: 6, coingeckoId: 'tether' },
+  ckBTC: { decimals: 8, coingeckoId: 'bitcoin' },
+  ckDOGE: { decimals: 8, coingeckoId: 'dogecoin' },
+}
+
+const chainTokens = {
+  icp: ['ICP'],
+  bitcoin: ['ckBTC'],
+  dogechain: ['ckDOGE'],
+  ethereum: ['USDC', 'USDT'],
+  arbitrum: ['USDC'],
+  base: ['USDC'],
+}
+
+function parseBalance(str) {
+  if (!str) return 0
+  return Number(str.toString().replace(/_/g, ''))
+}
+
+function calcChainShare(supply, bridgeData, chain, relevantChains) {
+  if (!bridgeData) return supply
+
+  const total = relevantChains
+    .reduce((sum, c) => sum + parseBalance(bridgeData[c]), 0)
+
+  if (total === 0) return supply
+
+  const chainBalance = parseBalance(bridgeData[chain])
+  return (supply * chainBalance) / total
+}
+
+function createTvl(chain) {
+  return async (api) => {
+    const [yusan, bridge] = await Promise.all([
+      getCache(YUSAN_API),
+      getCache(ONESEC_API),
+    ])
+
+    for (const symbol of chainTokens[chain]) {
+      const { decimals, coingeckoId } = tokens[symbol]
+      const supply = yusan.tokens[symbol]?.total_supply || 0
+      if (supply <= 0) continue
+
+      // Check if token is on multiple chains
+      const chainsWithToken = Object.entries(chainTokens)
+        .filter(([, syms]) => syms.includes(symbol))
+        .map(([c]) => c)
+
+      let amount = supply
+      if (chainsWithToken.length > 1) {
+        amount = calcChainShare(supply, bridge[symbol], chain, chainsWithToken)
+      }
+
+      if (amount > 0) {
+        api.addCGToken(coingeckoId, amount / 10 ** decimals)
+      }
+    }
+  }
+}
+
+async function borrowed(api) {
+  const data = await getCache(YUSAN_API)
+
+  for (const [symbol, { decimals, coingeckoId }] of Object.entries(tokens)) {
+    const balance = data.tokens[symbol]?.total_borrow || 0
+    if (balance > 0) {
+      api.addCGToken(coingeckoId, balance / 10 ** decimals)
+    }
+  }
+}
+
+module.exports = {
+  timetravel: false,
+  methodology:
+    'Cross-chain lending protocol. Deposits attributed to origin chains.',
+  icp: { tvl: createTvl('icp'), borrowed },
+  bitcoin: { tvl: createTvl('bitcoin') },
+  dogechain: { tvl: createTvl('dogechain') },
+  ethereum: { tvl: createTvl('ethereum') },
+  arbitrum: { tvl: createTvl('arbitrum') },
+  base: { tvl: createTvl('base') },
+}