add hermetica usdh

Author: realdealshaman

src/adapters/peggedAssets/hermetica-usdh/index.ts

@@ -0,0 +1,69 @@
+import { sumSingleBalance } from "../helper/generalUtil";
+import { PeggedIssuanceAdapter, Balances, ChainBlocks, ChainContracts } from "../peggedAsset.type";
+import axios from "axios";
+
+const USDhContract = 'SPN5AKG35QZSK2M8GAMR4AFX45659RJHDW353HSG.usdh-token-v1';
+const API_URL = 'https://api.mainnet.hiro.so/v2/contracts/call-read';
+
+const chainContracts: ChainContracts = {
+  stacks: {
+    issued: [
+      USDhContract,
+    ],
+  },
+};
+
+function parseClarityInt(hexString: string): string {
+  const hex = hexString.startsWith("0x") ? hexString.slice(2) : hexString;
+  const numberHex = hex.slice(4);
+  let bigIntValue = BigInt("0x" + numberHex);
+
+  if (bigIntValue > BigInt("0x7ffffffffffffffffffffffffffffffff")) {
+    bigIntValue = bigIntValue - BigInt("0x100000000000000000000000000000000");
+  }
+
+  return bigIntValue.toString();
+}
+
+async function fetchWithRetry(url: string, data: any, retries = 3): Promise<any> {
+  for (let attempt = 1; attempt <= retries; attempt++) {
+    try {
+      return await axios.post(url, data);
+    } catch (error) {
+      if (attempt === retries) throw error;
+      await new Promise((resolve) => setTimeout(resolve, 1000 * attempt)); // Exponential backoff
+    }
+  }
+}
+
+async function hermeticaMinted(decimals: number) {
+  return async function (
+    _timestamp: number,
+    _ethBlock: number,
+    _chainBlocks: ChainBlocks
+  ) {
+    const balances = {} as Balances;
+    const [contractAddress, contractName] = USDhContract.split('.');
+
+    const res = await fetchWithRetry(`${API_URL}/${contractAddress}/${contractName}/get-total-supply`, {
+      sender: contractAddress,
+      arguments: [],
+    });
+
+    const result = res?.data?.result;
+    if (result) {
+      const supply = Number(parseClarityInt(result)) / 10 ** decimals;
+      sumSingleBalance(balances, "peggedUSD", supply, "issued", false);
+    }
+
+    return balances;
+  };
+}
+
+const adapter: PeggedIssuanceAdapter = {
+  stacks: {
+    minted: hermeticaMinted(8), 
+  },
+};
+
+export default adapter;