Add more Walkthrough sections

Author: rojvv

src/index.md

@@ -23,8 +23,6 @@ Its key features include:
 
 ### Walkthrough
 
-Start with the main walkthrough. Individual sections are tagged when they apply only to user accounts or bots.
-
 #### Main
 
 {{ "main" |> walkthrough }}

src/star-balance-and-transactions.md

@@ -0,0 +1,33 @@
+---
+title: Star Balance and Transactions
+parent: /#walkthrough
+walkthrough:
+  track: main
+  order: 21
+---
+
+Clients can check their Telegram Star balance and transaction history.
+
+## Getting the Balance
+
+Use {{ "getStarBalance" |> m }} with `"me"` to get the current account's balance.
+
+```ts
+const balance = await client.getStarBalance("me");
+
+console.log(balance.amount, balance.nanos);
+```
+
+## Listing Transactions
+
+Use {{ "getStarTransactions" |> m }} to get the current account's transactions.
+
+```ts
+const { transactions } = await client.getStarTransactions("me", {
+  limit: 10,
+});
+
+for (const transaction of transactions) {
+  console.log(transaction.id, transaction.amount.amount);
+}
+```

src/star-payment-refunds.md

@@ -0,0 +1,17 @@
+---
+title: Star Payment Refunds
+parent: /#walkthrough
+walkthrough:
+  track: bot
+  order: 17
+---
+
+Bots can refund payments made with Telegram Stars.
+
+## Refunding a Payment
+
+Use {{ "refundStarPayment" |> m }} with the charged user's identifier and the `telegramPaymentChargeId` from the successful payment.
+
+```ts
+await client.refundStarPayment(userId, telegramPaymentChargeId);
+```