feat: add Algorand transaction fee fetching adapter (#4920)

* feat: add Algorand transaction fee fetching adapter

* refactor

---------

Co-authored-by: Eden <[email protected]>

Author: pyoneerC

fees/algorand.ts

@@ -0,0 +1,75 @@
+import { FetchOptions, SimpleAdapter, ProtocolType } from "../adapters/types";
+import { CHAIN } from "../helpers/chains";
+import { httpGet } from "../utils/fetchURL";
+
+/**
+ * Fetches Algorand blockchain transaction fees using AlgoNode's public API
+ * and aggregates them for the given time period
+ */
+const fetch = async (options: FetchOptions) => {
+  const dailyFees = options.createBalances();
+
+  // Convert to ISO format for the API
+  const startDate = new Date(options.startTimestamp * 1000).toISOString();
+  const endDate = new Date(options.endTimestamp * 1000).toISOString();
+  
+  let totalFees = 0;
+  let nextToken: string | undefined = undefined;
+  let requestCount = 0;
+  const MAX_REQUESTS = 100; // Safety limit to prevent infinite loops
+  
+  // Query transactions from AlgoNode public indexer (more reliable)
+  do {
+    let url = `https://mainnet-idx.algonode.cloud/v2/transactions?after-time=${startDate}&before-time=${endDate}&limit=1000`;
+    if (nextToken) {
+      url += `&next=${nextToken}`;
+    }
+
+    const response = await httpGet(url);
+    const txns = response.transactions || [];
+
+    // Sum all transaction fees (fees are in microAlgos)
+    for (const txn of txns) {
+      if (txn.fee && typeof txn.fee === 'number') {
+        totalFees += txn.fee;
+      }
+    }
+
+    nextToken = response['next-token'];
+    requestCount++;
+    
+    // Safety checks
+    if (!nextToken || txns.length === 0 || requestCount >= MAX_REQUESTS) {
+      break;
+    }
+  } while (nextToken);
+
+  // Convert from microAlgos to ALGO (1 ALGO = 1,000,000 microAlgos)
+  dailyFees.addCGToken('algorand', totalFees / 1e6);
+
+  return {
+    dailyFees,
+    dailyRevenue: dailyFees,
+    dailyHoldersRevenue: dailyFees, // All transaction fees on Algorand are burned
+  };
+};
+
+const methodology = {
+  Fees: "All transaction fees paid by users on the Algorand blockchain",
+  Revenue: "All transaction fees on Algorand are burned, effectively benefiting all ALGO holders through reduced supply",
+  HoldersRevenue: "All transaction fees on Algorand are burned, effectively benefiting all ALGO holders through reduced supply"
+};
+
+const adapter: SimpleAdapter = {
+  version: 2,
+  adapter: {
+    [CHAIN.ALGORAND]: {
+      fetch,
+      start: '2019-06-11', // Algorand mainnet launch date
+    },
+  },
+  protocolType: ProtocolType.CHAIN,
+  methodology,
+};
+
+export default adapter;