added tvl adapter for dnax project (#17005)

Author: Tarunmeena0901

projects/dnax/index.js

@@ -0,0 +1,38 @@
+const { sumTokens2, nullAddress } = require('../helper/unwrapLPs')
+
+const VAULT = '0xafc43faE32302D725fC4d448525c44c522a9a1B9'
+const NATIVE_PLACEHOLDER = '0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee'
+
+const pairsAbi = 'function pairs() external view returns (address[2][])'
+
+module.exports = {
+  methodology: 'Reads the DNAX vault `pairs` list, then sums the balances of every listed token plus native BNB held by the vault.',
+  bsc: {
+    tvl: async (api) => {
+      const pairs = await api.call({ target: VAULT, abi: pairsAbi })
+      const tokenSet = new Set()
+
+      pairs.forEach(([token0, token1]) => {
+        if (token0) tokenSet.add(formatToken(token0))
+        if (token1) tokenSet.add(formatToken(token1))
+      })
+
+      tokenSet.delete(undefined)
+
+      return sumTokens2({
+        api,
+        owner: VAULT,
+        tokens: Array.from(tokenSet),
+        permitFailure: true,
+      })
+    },
+  },
+}
+
+function formatToken(token) {
+  const normalized = token.toLowerCase()
+  if (normalized === NATIVE_PLACEHOLDER) return nullAddress
+  if (normalized === '0x0000000000000000000000000000000000000000') return nullAddress
+  return normalized
+}
+