refactor threshold usd adapter (#354)

* refactor threshold usd adapter

* code refactor

---------

Co-authored-by: g1nt0ki <99907941+g1nt0ki@users.noreply.github.com>

src/adapters/peggedAssets/threshold-usd/index.ts

@@ -1,16 +1,44 @@
+import {
+  PeggedIssuanceAdapter,
+  Balances,
+} from "../peggedAsset.type";
+import { sumSingleBalance } from "../helper/generalUtil";
+import { ChainApi } from "@defillama/sdk";
+
 const chainContracts = {
-    ethereum: {
-      issued: ["0xcfc5bd99915aaa815401c5a41a927ab7a38d29cf"],
-      unreleased: [
-        "0x097f1ee62E63aCFC3Bf64c1a61d96B3771dd06cB", // Protocol Controlled Value
-        "0x1a4739509F50E683927472b03e251e36d07DD872", // Protocol Controlled ETH Value
-        "0xF6374AEfb1e69a21ee516ea4B803b2eA96d06f29", // Stability Pool
-        "0xA18Ab4Fa9a44A72c58e64bfB33D425Ec48475a9f", // Stability Pool ETH
-      ],
-    },
+  ethereum: {
+    issued: ["0xcfc5bd99915aaa815401c5a41a927ab7a38d29cf"],
+    pcvContracts: [
+      "0x097f1ee62E63aCFC3Bf64c1a61d96B3771dd06cB", // Protocol Controlled Value tBTC Collateral
+      "0x1a4739509F50E683927472b03e251e36d07DD872", // Protocol Controlled Value ETH Collateral
+    ],
+  },
+};
+
+async function ethereumMinted() {
+  return async function (api: ChainApi) {
+    let balances = {} as Balances;
+    const totalSupply = await api.call({ abi: "erc20:totalSupply", target: chainContracts.ethereum.issued[0], })
+    sumSingleBalance(balances, "peggedUSD", totalSupply / 1e18, "issued", false);
+    return balances;
   };
-  
-  import { addChainExports } from "../helper/getSupply";
-  const adapter = addChainExports(chainContracts);
-  export default adapter;
-  
+}
+
+async function ethereumUnreleased() {
+  return async function (api: ChainApi) {
+    let balances = {} as Balances;
+    const debts = await api.multiCall({  abi: 'uint256:debtToPay', calls: chainContracts.ethereum.pcvContracts})
+    for (const debt of debts) 
+      sumSingleBalance(balances, "peggedUSD", debt / 1e18)
+    return balances;
+  };
+}
+
+const adapter: PeggedIssuanceAdapter = {
+  ethereum: {
+    minted: ethereumMinted(),
+    unreleased: ethereumUnreleased(),
+  },
+};
+
+export default adapter;