Update Cygnus Finance with adding TON TVL (DefiLlama#11021)

* feat: add ton TVL of Cygnus Finance

* feat: adjust tvl methodology

projects/cygnus-finance/index.js

@@ -1,14 +1,45 @@
-const CGUSD_CONTRACT = "0xCa72827a3D211CfD8F6b00Ac98824872b72CAb49";
-const START_TIME = 1708351200;
+const { call } = require("../helper/chain/ton")
+const { get } = require('../helper/http')
 
-async function tvl(api) {
-  await api.erc4626Sum({ calls: [CGUSD_CONTRACT], balanceAbi: 'getTotalPooledAssets', tokenAbi: "asset" });
+const CGUSD_CONTRACT = "0xCa72827a3D211CfD8F6b00Ac98824872b72CAb49"
+const START_TIME = 1708351200
+
+async function baseTvl(api) {
+  await api.erc4626Sum({ calls: [CGUSD_CONTRACT], balanceAbi: 'getTotalPooledAssets', tokenAbi: "asset" })
+}
+
+// helper function of getting jetton metadata
+async function getJettonMetadata(addr) {
+  const res = await get(`https://tonapi.io/v2/jettons/${addr}`)
+  return res
+}
+
+async function tonTvl() {
+  const MINTER_ADDRESS = "EQCfvQW-thWpqKgyqtXCFbYayDlHqS0-frkyP6VD70paLFZa"
+  const CGUSDT_ADDRESS = 'EQBIBw3mF_TDMJqWAZihVsyUBMWpWw_deftZLiCxTmrCUOKy'
+
+
+  const minterResult = await call({ target: MINTER_ADDRESS, abi: "get_minter_data", stack: [] })
+  // exchange rate from cgUSDT to USDT: decimal 9
+  const cgusdtTousdt = (minterResult[5]) / 10 ** 9
+
+  // cgUSDT total supply: decimal 6
+  const jettonResult = await getJettonMetadata(CGUSDT_ADDRESS)
+  const cgUsdtTotalSupply = jettonResult['total_supply']
+
+  // caculate tvl
+  const tvl = (cgUsdtTotalSupply) / 10 ** 6 * cgusdtTousdt
+  return { "coingecko:tether": tvl }
 }
 
+
 module.exports = {
-  methodology: "Calculates the total cgUSD Supply",
+  methodology: "Calculates the total cgUSD and cgUSDT Supply",
   start: START_TIME,
   base: {
-    tvl,
+    tvl: baseTvl,
   },
+  ton: {
+    tvl: tonTvl
+  }
 };