Update Fee-bump transactions to use rpc instead of horizon (#1769)

Author: tamirms

docs/build/guides/transactions/fee-bump-transactions.mdx

@@ -77,30 +77,28 @@ This example shows how to create and submit a fee-bump transaction on the Stella
 <CodeExample>
 
 ```js
-import * as StellarSDK from "@stellar/stellar-sdk";
+import * as StellarSdk from "@stellar/stellar-sdk";
 
 // Define the network passphrase (use 'Testnet' for testing and 'Public Global Stellar Network ; September 2015' for production)
-const networkPassphrase = StellarSDK.Networks.TESTNET;
+const networkPassphrase = StellarSdk.Networks.TESTNET;
 
 // Create keypairs for the source account and the fee account
-const sourceKeypair = StellarSDK.Keypair.fromSecret("SECREY_KEY_1");
-const feeKeypair = StellarSDK.Keypair.fromSecret("SECREY_KEY_2");
+const sourceKeypair = StellarSdk.Keypair.fromSecret("SECREY_KEY_1");
+const feeKeypair = StellarSdk.Keypair.fromSecret("SECREY_KEY_2");
 
 // Load the source account (this requires network interaction)
-const server = new StellarSDK.Horizon.Server(
-  "https://horizon-testnet.stellar.org",
-);
-const sourceAccount = await server.loadAccount(sourceKeypair.publicKey());
+const server = new StellarSdk.rpc.Server("https://soroban-testnet.stellar.org");
+const sourceAccount = await server.getAccount(sourceKeypair.publicKey());
 
 // Construct the inner transaction, just a example tx, to transfer 10 XLM to a destination account
-const innerTransaction = new StellarSDK.TransactionBuilder(sourceAccount, {
-  fee: StellarSDK.BASE_FEE,
+const innerTransaction = new StellarSdk.TransactionBuilder(sourceAccount, {
+  fee: StellarSdk.BASE_FEE,
   networkPassphrase,
 })
   .addOperation(
-    StellarSDK.Operation.payment({
+    StellarSdk.Operation.payment({
       destination: "GDWH3P3MNTCMOY42CA7RVEACUUAUPZ73XDYKPYUL3TWOFRF37FD6OVM6",
-      asset: StellarSDK.Asset.native(),
+      asset: StellarSdk.Asset.native(),
       amount: "10",
     }),
   )
@@ -112,9 +110,9 @@ innerTransaction.sign(sourceKeypair);
 
 // Build the fee-bump transaction
 const feeBumpTransaction =
-  StellarSDK.TransactionBuilder.buildFeeBumpTransaction(
+  StellarSdk.TransactionBuilder.buildFeeBumpTransaction(
     feeKeypair,
-    StellarSDK.BASE_FEE * 2,
+    StellarSdk.BASE_FEE * 2,
     innerTransaction,
     networkPassphrase,
   );
@@ -124,9 +122,19 @@ feeBumpTransaction.sign(feeKeypair);
 
 // Submit the fee-bump transaction to the Stellar network
 server
-  .submitTransaction(feeBumpTransaction)
+  .sendTransaction(feeBumpTransaction)
   .then((response) => {
-    console.log("Success! Results:", response);
+    if (response.status !== "PENDING") {
+      throw response;
+    }
+
+    return server.pollTransaction(response.hash, {
+      sleepStrategy: StellarSdk.rpc.LinearSleepStrategy,
+      attempts: 5,
+    });
+  })
+  .then((response) => {
+    console.log("transaction response:", response);
   })
   .catch((error) => {
     console.error("Something went wrong!", error);