---
title: "Quick Start - SALE Transaction"
source_url: https://docs.rapyd.net/en/quick-start---sale-transaction.html
lang: en
---

# Quick Start - SALE Transaction

This is the minimal integration path. Call `startCore` once at app startup, then call `startTransaction` whenever you want to charge a customer.

Step 1 — Start Core at app launch

```java

// In Application.onCreate() or your launcher Activity
Api.startCore(context, "MyApp");
```

Step 2 — Initiate a SALE for $10.00

Amounts are always in minor units (cents, pence, etc.). $10.00 = `1000`.

```java

HashMap<String, String> params = new HashMap<>();
params.put(Parameters.CORRELATION_ID, "order-abc-123");  // your own reference

Api.startTransaction(1000, TransactionType.SALE, params, context);
```

Core takes control of the UI. Your app moves to the background.

Step 3 — Receive the result in your BroadcastReceiver

```java

case Messages.TRANSACTION_RESULT_ACTION: {
    TransactionResult result = WrapperUtils.getTransactionResultFromJson(
        intent.getStringExtra(Messages.TRANSACTION_RESULT));

    if ("00".equals(result.getTransactionResponse())) {
        // Approved — result.getAuthCode(), result.getUti(), etc.
    } else {
        // Declined
    }
    break;
}
```

Core broadcasts `ACTION_CALLBACK` after sending the result, bringing your app back to the foreground.