track stellar chain fees

fees/stellar/index.ts

@@ -0,0 +1,45 @@
+import { Dependencies, FetchOptions, ProtocolType, SimpleAdapter } from "../../adapters/types";
+import { queryDuneSql } from "../../helpers/dune";
+import { CHAIN } from "../../helpers/chains";
+
+async function fetch(_a: any, _b: any, options: FetchOptions) {
+  const dailyFees = options.createBalances();
+
+  const query = `
+    select 
+      sum(fee_charged/1e7) as stellar_txn_fee 
+    from stellar.history_transactions 
+      where closed_at_date=Date('${options.dateString}')
+  `;
+
+  const queryResults: { stellar_txn_fee: string }[] = await queryDuneSql(options, query);
+
+  if (!queryResults[0] || !queryResults[0].stellar_txn_fee)
+    throw new Error(`Stellar txn fee not found`);
+
+  dailyFees.addCGToken("stellar", queryResults[0].stellar_txn_fee);
+
+  return {
+    dailyFees,
+    dailyRevenue: dailyFees,
+    dailyProtocolRevenue: dailyFees
+  }
+}
+
+const methodology = {
+  Fees: "Transaction fee paid by users",
+  Revenue: "All the fee goes to fee pool",
+  ProtocolRevenue: "All the fee goes to fee pool",
+};
+
+const adapter: SimpleAdapter = {
+  fetch,
+  start: "2015-09-30",
+  chains: [CHAIN.STELLAR],
+  protocolType: ProtocolType.CHAIN,
+  isExpensiveAdapter: true,
+  dependencies: [Dependencies.DUNE],
+  methodology,
+};
+
+export default adapter;