adding some helper methods

src/walletSdk/Horizon/Stellar.ts

@@ -5,6 +5,7 @@ import {
   TransactionBuilder as StellarTransactionBuilder,
   FeeBumpTransaction,
 } from "stellar-sdk";
+import axios from "axios";
 
 import { Config } from "walletSdk";
 import { AccountService } from "./AccountService";
@@ -224,4 +225,24 @@ export class Stellar {
   decodeTransaction(xdr: string): Transaction | FeeBumpTransaction {
     return StellarTransactionBuilder.fromXDR(xdr, this.cfg.stellar.network);
   }
+
+  /**
+   * Returns the recommended fee (stroops) to use in a transaction based on the current
+   * stellar network fee stats.
+   * @returns {string} The recommended fee amount in stroops.
+   */
+  async getRecommendedFee(): Promise<string> {
+    const stats = await this.server.feeStats();
+    return stats.max_fee.mode;
+  }
+
+  /**
+   * Funds an account on the stellar test network. If it is already funded then call will error.
+   * Please note: only funds on the testnet network.
+   * @see {@link https://developers.stellar.org/docs/fundamentals-and-concepts/testnet-and-pubnet#friendbot}
+   * @param {string} address - The stellar address.
+   */
+  async fundTestnetAccount(address: string) {
+    await axios.get(`https://friendbot.stellar.org/?addr=${address}`);
+  }
 }

test/stellar.test.ts

@@ -27,7 +27,7 @@ describe("Stellar", () => {
     try {
       await stellar.server.loadAccount(kp.publicKey);
     } catch (e) {
-      await axios.get("https://friendbot.stellar.org/?addr=" + kp.publicKey);
+      await stellar.fundTestnetAccount(kp.publicKey);
     }
   }, 10000);
   it("should create and submit a transaction", async () => {
@@ -237,6 +237,11 @@ describe("Stellar", () => {
       expect(txn).toBeTruthy();
     }
   }, 20000);
+
+  it("should return recommended fee", async () => {
+    const fee = await stellar.getRecommendedFee();
+    expect(fee).toBeTruthy();
+  });
 });
 
 let txnSourceKp;

test/transaction.test.ts

@@ -313,7 +313,9 @@ describe("Path Payment", () => {
     const txBuilder = await stellar.transaction({
       sourceAddress: sourceKp,
     });
-    const txn = txBuilder.swap(new NativeAssetId(), usdcAsset, ".1").build();
+    const txn = txBuilder
+      .swap(new NativeAssetId(), new NativeAssetId(), ".1")
+      .build();
     sourceKp.sign(txn);
     const success = await stellar.submitTransaction(txn);
     expect(success).toBe(true);