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Stripe Payments & SaaS Billing Systems · Урок

Интеграция API Payment Intents

Научитесь использовать API Payment Intents для динамических платёжных процессов, обеспечивая безопасную и надёжную обработку транзакций в различных сценариях.

«Интеграция API Payment Intents» — бесплатный урок Stripe Payments & SaaS Billing Systems на CoddyKit. Это урок 1 из 4. Ты можешь прочитать весь урок бесплатно ниже — а потом практиковать его прямо в браузере с встроенным редактором кода и ИИ-репетитором 24/7. Это часть пути обучения Stripe Payments & SaaS Billing Systems, и твой прогресс синхронизируется между веб-версией и приложением CoddyKit. Курс Stripe Payments & SaaS Billing Systems содержит 4 уроков всего.

Части этого урока еще не переведены и отображаются на английском.

Why Payment Intents?

Welcome! Today, we're diving into Stripe's Payment Intents API. This is a powerful tool for managing complex payment flows.

Before Payment Intents, simple charges worked for basic payments. But what about payments that need extra steps, like 3D Secure authentication?

Payment Intents solve this by representing your intention to collect a payment, allowing for dynamic, multi-step processes.

The Payment Intent Object

A Payment Intent is an object that tracks the lifecycle of a customer's payment attempt. It guides you through the necessary steps to complete a payment.

  • Created: The intent is ready to start.
  • Requires Action: Customer needs to authenticate (e.g., 3D Secure).
  • Succeeded: Payment is complete.
  • Canceled: The payment attempt was abandoned.

This object helps manage everything from initial creation to final confirmation.

Server-Side: Creating an Intent

The first step is always to create a Payment Intent on your server. This ensures sensitive details like the amount and currency are controlled server-side.

You specify the amount, currency, and payment method types you'll accept (e.g., 'card'). Stripe then returns a PaymentIntent object, which includes a client_secret.

Try running this simplified server-side example (Java):

import java.util.List;
import java.util.Map;

// This is a simplified example to illustrate server-side intent creation.
// In a real application, this would involve calling Stripe's API.
public class Main {
  public static void main(String[] args) {
    long amount = 1000L; // Example: $10.00 in cents
    String currency = "usd";
    String paymentMethodType = "card";

    System.out.println("--- Server-Side Payment Intent Creation ---");
    System.out.println("Creating Payment Intent for: " + amount + " " + currency);
    System.out.println("Payment method type: " + paymentMethodType);
    System.out.println("\nStripe API call (conceptual, using Java client library):\n");
    System.out.println("  PaymentIntent.create(Map.of(");
    System.out.println("    \"amount\", " + amount + "L,");
    System.out.println("    \"currency\", \"" + currency + "\",");
    System.out.println("    \"payment_method_types\", List.of(\"" + paymentMethodType + "\")");
    System.out.println("  ));");
    System.out.println("\nStripe would return an object including:\n");
    System.out.println("  \"id\": \"pi_mockPaymentIntent123\",");
    System.out.println("  \"client_secret\": \"pi_mockPaymentIntent123_secret_mockSecretString\"");
    System.out.println("\nThe client_secret is then sent securely to the client-side.");
  }
}

Client-Side: Confirming the Payment

Once your server sends the client_secret to your frontend, you use Stripe.js to confirm the Payment Intent. This is where the customer interacts with the payment form.

Stripe.js handles the collection of payment details and any required authentication (like 3D Secure) automatically, using the client_secret to link to the server-created intent.

  • 1. Collect details: Customer enters card info.
  • 2. Call stripe.confirmCardPayment(): Pass the client_secret and card details.
  • 3. Handle result: Stripe returns the final status.

Understanding Payment Statuses

The status field of a Payment Intent is crucial for understanding its state. Here are the common ones:

  • requires_payment_method: Needs payment details.
  • requires_confirmation: Ready to be confirmed.
  • requires_action: Customer needs to complete an action (e.g., 3D Secure).
  • processing: Payment is being processed.
  • succeeded: Payment was successful!
  • canceled: Payment was canceled.

Your application logic should react to these statuses.

Handling 3D Secure & SCA

Strong Customer Authentication (SCA), often involving 3D Secure, is a regulatory requirement in Europe for many online card payments. Payment Intents are designed to handle this seamlessly.

If a payment requires SCA, the Payment Intent's status will change to requires_action. Stripe.js will then automatically prompt the customer to complete the authentication step (e.g., redirect to their bank's page).

Your client-side confirmation call will then complete once authentication is done.

Securing the client_secret

The client_secret is a unique key that ties a client-side action to a specific Payment Intent on your server. It's safe to expose on the client, but only for a limited time.

  • Generate on server: Always create the Payment Intent and its client_secret on your backend.
  • Pass securely: Send the client_secret to your frontend (e.g., via a secure API endpoint).
  • Use promptly: Use it immediately on the client to confirm the payment.

Never generate or store the client_secret directly on the client side.

Retrieving & Updating Intents

You can retrieve a Payment Intent at any time using its ID from your server-side code. This is useful for checking its current status or details.

You can also update a Payment Intent (e.g., change the amount or currency) as long as it hasn't been confirmed yet. This offers flexibility for dynamic pricing or order changes before final payment.

However, once confirmed, a Payment Intent cannot be modified.

Payment Method Attachment

When a Payment Intent succeeds, Stripe can optionally save the customer's payment method for future use. This is done by attaching the payment method to a Customer object.

This is useful for recurring payments or one-click checkouts. You'd set the setup_future_usage parameter when creating the Payment Intent, or explicitly create a Setup Intent (a topic for another lesson!).

Always ensure you have customer consent to save payment details.

Quick Check: Payment Intents

You've learned about the Payment Intents API. Let's test your understanding!

Recap: Mastering Payment Intents

Great job! You've learned the fundamentals of Stripe's Payment Intents API.

  • Payment Intents manage payment lifecycles, especially for multi-step or authenticated payments.
  • You create them server-side, get a client_secret, and confirm them client-side with Stripe.js.
  • Statuses like requires_action help you handle dynamic flows like 3D Secure.

This API is essential for building robust and compliant payment experiences. Keep practicing!

Часто задаваемые вопросы

Урок «Интеграция API Payment Intents» бесплатный?

Да — полный текст урока «Интеграция API Payment Intents» бесплатно доступен здесь в веб-версии. Чтобы практиковать его интерактивно (встроенный редактор кода и ИИ-репетитор 24/7) и разблокировать остальной курс Stripe Payments & SaaS Billing Systems, подпишись на CoddyKit PRO. Курс Stripe Payments & SaaS Billing Systems содержит 4 уроков всего.

Чему я научусь в уроке «Интеграция API Payment Intents»?

Научитесь использовать API Payment Intents для динамических платёжных процессов, обеспечивая безопасную и надёжную обработку транзакций в различных сценариях. Ты практикуешь Stripe Payments & SaaS Billing Systems с помощью реального кода, который запускаешь прямо в браузере, и ИИ-репетитор 24/7 отвечает на твои вопросы во время урока.

Нужен ли мне опыт, чтобы начать Stripe Payments & SaaS Billing Systems?

Предыдущий опыт не требуется. Stripe Payments & SaaS Billing Systems на CoddyKit структурирован для всех уровней — от новичков до продвинутых, поэтому ты можешь начать отсюда или с самого начала и учиться в своем темпе. Это урок 1 из 4.

Сколько времени занимает урок «Интеграция API Payment Intents»?

Большинство уроков CoddyKit занимают около 5–10 минут. Каждый из них компактный и интерактивный, поэтому ты постоянно делаешь прогресс и продолжаешь с того же места в веб-версии и приложении.

Можно ли писать и запускать код в этом уроке Stripe Payments & SaaS Billing Systems?

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Все уроки этого курса

  1. Интеграция API Payment Intents
  2. Обработка вебхуков для асинхронных событий
  3. Эффективное управление возвратами и спорами
  4. Реализация идемпотентности для надёжных API платежей
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