feat(bitty): add btc chain (#16681)

projects/bitty/bitcoin/index.js

@@ -0,0 +1,61 @@
+const { getConfig } = require("../../helper/cache");
+const sdk = require("@defillama/sdk");
+
+const API = 'https://api.bitty.io/lending/asset/explore'
+
+function aggregateBalances(list, pickAmount) {
+  const balances = {}
+  list = Array.isArray(list) ? list : []
+  for (const item of list) {
+    const id = String(item?.assetId || '').toUpperCase()
+    if (id !== 'BTC') continue
+    const amount = pickAmount(item)
+    if (amount > 0n)
+      sdk.util.sumSingleBalance(balances, 'bitcoin', Number(amount / 100000000n))
+  }
+  return balances
+}
+
+async function tvl() {
+  const data = await getConfig('bitty/bitcoin-tvl', API)
+  if (!data) return {}
+
+  // Sum available liquidity (supply - borrowed)
+  const balances = aggregateBalances(data.liquidityList, (item) => {
+    const totalSupply = BigInt(item?.totalSupply ?? '0')
+    const totalBorrowed = BigInt(item?.totalBorrowed ?? '0')
+    const available = totalSupply - totalBorrowed
+    return available > 0n ? available : 0n
+  })
+
+  // Add BTC value of collateral across pools with active debt: collateralAmount * collateralPrice (both in sats)
+  const collateralBalances = aggregateBalances(data.poolList, (item) => {
+    const totalDebt = BigInt(item?.totalDebt ?? '0')
+    if (totalDebt <= 0n) return 0n // Only count collateral for pools with active debt
+
+    const amount = BigInt(item?.collateralAmount ?? '0')
+    const price = BigInt(item?.collateralPrice ?? '0')
+    const total = amount * price
+    return total > 0n ? total : 0n
+  })
+
+  Object.entries(collateralBalances).forEach(([token, amount]) => {
+    sdk.util.sumSingleBalance(balances, token, amount)
+  })
+
+  return balances
+}
+
+async function borrowed() {
+  const data = await getConfig('bitty/bitcoin-tvl', API)
+  if (!data) return {}
+
+  // Sum total borrowed amounts from liquidity pools
+  // Note: totalBorrowed <= 0 indicates no active borrows
+  return aggregateBalances(data.liquidityList, (item) => {
+    const totalBorrowed = BigInt(item?.totalBorrowed ?? '0')
+    return totalBorrowed > 0n ? totalBorrowed : 0n
+  })
+}
+
+module.exports = { tvl, borrowed }

projects/bitty/index.js

@@ -1,10 +1,10 @@
-const { tvl, borrowed } = require("./helper");
+const ethereum = require("./ethereum");
+const bitcoin = require("./bitcoin");
 const methodologies = require("../helper/methodologies");
 
 module.exports = {
   methodology: methodologies.lendingMarket,
-  ethereum: {
-    tvl,
-    borrowed,
-  }
+  timetravel: false,
+  ethereum,
+  bitcoin,
 };