### Start Example App Packager

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/CONTRIBUTING.md

Starts the Metro server, which is required to run the example application. This allows developers to test changes in a live environment.

```sh
yarn example start
```

--------------------------------

### Full Primer React Native SDK Integration Example

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/README.md

A comprehensive example combining initialization, client token generation, and displaying Universal Checkout in a React Native component. It includes the `onCheckoutComplete` callback for handling payment results.

```javascript
import * as React from 'react';
import {
  Primer,
  PrimerSettings,
  PrimerCheckoutData
} from '@primer-io/react-native';

const CheckoutScreen = async (props: any) => {
  const onCheckoutComplete = (checkoutData: PrimerCheckoutData) => {
    // Show a success screen
  };

  const onUniversalCheckoutButtonTapped = async () => {
    const settings: PrimerSettings = {
      onCheckoutComplete: onCheckoutComplete
    };

    // Configure the SDK
    await Primer.configure(settings);

    // Ask your backend to create a client session
    const clientToken = await createClientSession(clientSessionRequestParams);

    // Present Universal Checkout
    await Primer.showUniversalCheckout(clientToken);
  };
}
```

--------------------------------

### Install Primer React Native SDK

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/README.md

Instructions for adding the Primer React Native SDK package to your project using either yarn or npm. After installation, navigate to the \/ios folder and run pod install.

```shell
# With yarn
yarn add @primer-io/react-native

# With npm
npm i @primer-io/react-native --save
```

--------------------------------

### Install Primer React Native SDK

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Instructions for installing the Primer React Native SDK using either Yarn or npm. Includes a step for installing CocoaPods dependencies for iOS.

```bash
# Install with yarn
yarn add @primer-io/react-native

# Install with npm
npm install @primer-io/react-native --save

# For iOS, install CocoaPods dependencies
cd ios && pod install
```

--------------------------------

### Show Universal Checkout with Primer SDK

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/README.md

Shows how to present the Universal Checkout interface to the user after obtaining a client token. This is achieved by calling the `showUniversalCheckout` function with the obtained client token.

```javascript
const CheckoutScreen = (props: any) => {

  // ...

  const onUniversalCheckoutButtonTapped = async () => {
    try {
      // ...

      // Present Universal Checkout
      await Primer.showUniversalCheckout(clientToken);
    } catch (err) {
      // ...
    }
  };
}
```

--------------------------------

### Run Example App on Android

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/CONTRIBUTING.md

Builds and runs the example application on an Android device or emulator. This is used to test functionality and UI on the Android platform.

```sh
yarn example android
```

--------------------------------

### Bootstrap Project Dependencies and Pods

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/CONTRIBUTING.md

Installs all project dependencies and CocoaPods for the iOS environment. This script is used for initial project setup or after major dependency changes.

```sh
yarn bootstrap
```

--------------------------------

### Initialize Primer React Native SDK

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/README.md

Demonstrates how to initialize the Primer SDK within a React Native component. It involves importing necessary components, defining settings (including a callback for checkout completion), and calling the `configure` function.

```javascript
import * as React from 'react';
import {
  Primer,
  PrimerSettings,
  PrimerCheckoutData
} from '@primer-io/react-native';

const CheckoutScreen = (props: any) => {

  const onCheckoutComplete = (checkoutData: PrimerCheckoutData) => {
    // Perform an action based on the payment creation response
    // ex. show success screen, redirect to order confirmation view, etc.
  };

  React.useEffect(() => {
    const settings: PrimerSettings = {
      onCheckoutComplete: onCheckoutComplete
    };

    Primer.configure(settings)
      .then(() => {
        // SDK is initialized sucessfully
      })
      .catch (err => {
        // SDK failed to initialize
      })
  }, []);
}
```

--------------------------------

### Install Xcode Command Line Tools

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/fastlane/README.md

Ensures the latest Xcode command line tools are installed on your system, which is a prerequisite for using Fastlane. No specific inputs or outputs other than the successful installation of the tools.

```sh
xcode-select --install
```

--------------------------------

### Install Project Dependencies

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/CONTRIBUTING.md

Installs all necessary dependencies for the project, including those for each individual package. This is a prerequisite for most development tasks.

```sh
yarn
```

--------------------------------

### Run Example App on iOS

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/CONTRIBUTING.md

Builds and runs the example application on an iOS device or simulator. This is used to test functionality and UI on the iOS platform.

```sh
yarn example ios
```

--------------------------------

### Generate Client Token for Primer SDK

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/README.md

Illustrates how to generate a client token, a prerequisite for showing Universal Checkout. This typically involves making an API call to your backend to create a client session. The token should be stored for future use.

```javascript
const CheckoutScreen = (props: any) => {

  // ...

  const onUniversalCheckoutButtonTapped = async () => {
    try {
      // Make an API request to your backend to create a client session
      // and fetch a client token.
      const clientToken = await createClientSession(clientSessionRequestParams);
    } catch (err) {
      // ...
    }
  };
}
```

--------------------------------

### Build and Upload Android App to Appetize with Fastlane

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/fastlane/README.md

Executes the 'appetize_build_and_upload' action for the Android platform using Fastlane. This command builds the Android application and uploads it to Appetize.io for instant in-browser testing. Requires Appetize credentials and setup.

```sh
[bundle exec] fastlane android appetize_build_and_upload
```

--------------------------------

### Build and Upload iOS App to Appetize with Fastlane

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/fastlane/README.md

Executes the 'appetize_build_and_upload' action for the iOS platform using Fastlane. This command builds the iOS application and uploads it to Appetize.io for instant in-browser testing. Requires Appetize credentials and setup.

```sh
[bundle exec] fastlane ios appetize_build_and_upload
```

--------------------------------

### Implement Universal Checkout Flow

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Demonstrates the implementation of the Universal Checkout flow using the Primer SDK. This involves configuring the SDK, creating a client session via a backend API, and then displaying the Universal Checkout UI.

```javascript
import { Primer } from '@primer-io/react-native';
import axios from 'axios';

// Complete checkout flow implementation
const handleCheckout = async () => {
  try {
    // Step 1: Configure SDK
    const settings = {
      onCheckoutComplete: (checkoutData) => {
        console.log('Payment successful:', checkoutData.payment?.id);
        navigation.navigate('Success');
      },
      onError: (error, checkoutData, handler) => {
        console.error('Payment failed:', error.errorId, error.description);
        Alert.alert('Payment Error', error.description);
      }
    };

    await Primer.configure(settings);

    // Step 2: Create client session via backend
    const response = await axios.post('https://your-api.com/client-session', {
      customerId: 'customer_123',
      orderId: 'order_456',
      amount: 1000,
      currencyCode: 'USD'
    }, {
      headers: { 'X-Api-Key': 'your-api-key' }
    });

    const clientToken = response.data.clientToken;

    // Step 3: Show Universal Checkout
    await Primer.showUniversalCheckout(clientToken);

  } catch (error) {
    console.error('Checkout error:', error);
  }
};

// Clean up SDK when done
useEffect(() => {
  return () => {
    Primer.cleanUp();
  };
}, []);
```

--------------------------------

### Configure Primer SDK Settings and Callbacks

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Configures the Primer SDK with essential settings and callback functions for payment handling. Includes options for payment handling mode, checkout completion, error management, and pre-payment validation.

```javascript
import { Primer, PrimerSettings, PrimerCheckoutData } from '@primer-io/react-native';

// Configure SDK settings
const settings: PrimerSettings = {
  paymentHandling: 'AUTO',
  onCheckoutComplete: (checkoutData: PrimerCheckoutData) => {
    console.log('Payment completed:', checkoutData.payment?.id);
    // Navigate to success screen
  },
  onError: (error, checkoutData, handler) => {
    console.error('Payment error:', error.description);
    handler?.showErrorMessage(error.description);
  },
  onBeforePaymentCreate: (checkoutPaymentMethodData, handler) => {
    // Validate payment before creation
    console.log('Payment method:', checkoutPaymentMethodData.paymentMethodType);
    handler.continuePaymentCreation();
  },
  uiOptions: {
    isInitScreenEnabled: true,
    isSuccessScreenEnabled: true,
    theme: {
      colorPrimary: '#0055FF',
      colorText: '#000000'
    }
  }
};

// Initialize the SDK
await Primer.configure(settings);
```

--------------------------------

### Initialize Headless Universal Checkout in React Native

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Initializes the headless universal checkout flow, handling various callbacks for payment method loading, tokenization, and checkout completion. It requires a client token obtained from your backend and configures event listeners for a custom UI. Errors during the process are also handled.

```javascript
import {
  HeadlessUniversalCheckout,
  PrimerSettings,
  PaymentMethod
} from '@primer-io/react-native';

// Configure and start headless checkout
const startHeadlessCheckout = async () => {
  try {
    const settings: PrimerSettings = {
      headlessUniversalCheckoutCallbacks: {
        onAvailablePaymentMethodsLoad: (paymentMethods: PaymentMethod[]) => {
          console.log('Available payment methods:', paymentMethods.length);
          setPaymentMethods(paymentMethods);
        },
        onTokenizationStart: (paymentMethodType) => {
          console.log('Tokenizing:', paymentMethodType);
          setLoading(true);
        },
        onTokenizationSuccess: (paymentMethodTokenData, handler) => {
          console.log('Token created:', paymentMethodTokenData.token);
          handler.complete();
        },
        onCheckoutComplete: (checkoutData) => {
          console.log('Checkout complete:', checkoutData.payment?.id);
          setLoading(false);
          navigation.navigate('Success');
        },
        onError: (error, checkoutData) => {
          console.error('Error:', error.description);
          setLoading(false);
          Alert.alert('Error', error.description);
        }
      }
    };

    // Get client token from backend
    const { clientToken } = await createClientSession();

    // Start headless checkout
    const availablePaymentMethods = await HeadlessUniversalCheckout.startWithClientToken(
      clientToken,
      settings
    );

    console.log('Payment methods ready:', availablePaymentMethods);

  } catch (error) {
    console.error('Failed to start checkout:', error);
  }
};

```

--------------------------------

### Tokenization Handler: Manual Payment Handling with Custom Backend in React Native

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Configures manual payment handling using PrimerSettings, including the onTokenizeSuccess callback for custom backend integration. This function requires Primer, PrimerSettings, and TokenizationHandler imports. It sends payment tokens to a specified backend API and handles success, failure, or further authentication steps based on the backend's response.

```javascript
import {
  Primer,
  PrimerSettings,
  TokenizationHandler
} from '@primer-io/react-native';

// Manual payment handling with tokenization
const configureManualPayment = async () => {
  const settings: PrimerSettings = {
    paymentHandling: 'MANUAL',
    onTokenizeSuccess: async (paymentMethodTokenData, handler) => {
      try {
        console.log('Token:', paymentMethodTokenData.token);
        console.log('Type:', paymentMethodTokenData.paymentMethodType);

        // Send token to your backend
        const response = await fetch('https://your-api.com/payments', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({
            paymentMethodToken: paymentMethodTokenData.token,
            amount: 1000,
            currency: 'USD'
          })
        });

        const result = await response.json();

        if (result.status === 'AUTHORIZED') {
          // Payment successful
          handler.handleSuccess();
        } else if (result.requiresNewClientToken) {
          // Handle 3DS or additional authentication
          handler.continueWithNewClientToken(result.clientToken);
        } else {
          // Payment failed
          handler.handleFailure('Payment was declined');
        }

      } catch (error) {
        console.error('Backend error:', error);
        handler.handleFailure(error.message);
      }
    }
  };

  await Primer.configure(settings);
};

```

--------------------------------

### Configure Google Pay in React Native using Primer SDK

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Sets up Google Pay for integration with the Primer SDK. It defines merchant information, accepted card networks, billing address capture, and shipping address parameters. Dependencies include `PrimerSettings` from `@primer-io/react-native`. Customization options for the Google Pay button appearance are also available.

```javascript
import { PrimerSettings } from '@primer-io/react-native';

const settings: PrimerSettings = {
  paymentMethodOptions: {
    googlePayOptions: {
      merchantName: 'Your Company',
      allowedCardNetworks: ['VISA', 'MASTERCARD', 'AMEX'],
      isCaptureBillingAddressEnabled: true,
      emailAddressRequired: true,
      requireShippingMethod: true,
      shippingAddressParameters: {
        isPhoneNumberRequired: true
      },
      buttonOptions: {
        buttonType: 1, // Buy button
        buttonTheme: 2  // Dark theme
      }
    }
  }
};

await Primer.configure(settings);
```

--------------------------------

### Handle Client Session Updates in React Native

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

This snippet demonstrates how to configure the Primer SDK in React Native to handle client session updates. It includes callbacks for before and after a session update, allowing for UI changes like showing a loading indicator and updating order details upon successful update. Dependencies include '@primer-io/react-native'.

```javascript
import { PrimerSettings, ClientSession } from '@primer-io/react-native';

const settings: PrimerSettings = {
  onBeforeClientSessionUpdate: () => {
    console.log('Client session will update');
    // Show loading indicator
    setUpdating(true);
  },
  onClientSessionUpdate: (clientSession: ClientSession) => {
    console.log('Client session updated');
    console.log('Order:', clientSession.order);
    console.log('Amount:', clientSession.order?.totalAmount);
    console.log('Currency:', clientSession.order?.currencyCode);
    console.log('Customer:', clientSession.customer?.emailAddress);

    // Update UI with new session data
    setOrderAmount(clientSession.order?.totalAmount);
    setUpdating(false);
  }
};

await Primer.configure(settings);
```

--------------------------------

### Run Unit Tests

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/CONTRIBUTING.md

Executes the unit tests for the project using Jest. Adding tests for new changes is highly encouraged to ensure code stability.

```sh
yarn test
```

--------------------------------

### Implement Klarna Payment Flow in React Native with Primer SDK

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Integrates Klarna payments using `KlarnaManager` and `PrimerKlarnaPaymentView` from `@primer-io/react-native`. The `KlarnaManager` handles the payment session lifecycle, emitting events for different stages like `paymentSessionCreated` and `paymentSessionAuthorized`. The `PrimerKlarnaPaymentView` renders the Klarna payment interface.

```javascript
import { KlarnaManager } from '@primer-io/react-native';
import { PrimerKlarnaPaymentView } from '@primer-io/react-native';

// Configure Klarna payment manager
const handleKlarnaPayment = async () => {
  const manager = new KlarnaManager({
    paymentMethodType: 'KLARNA',
    onStep: (step) => {
      console.log('Klarna step:', step.stepName);

      if (step.stepName === 'paymentSessionCreated') {
        console.log('Payment categories:', step.paymentCategories);
        setKlarnaCategories(step.paymentCategories);
      } else if (step.stepName === 'paymentSessionAuthorized') {
        console.log('Payment authorized');
        setShowKlarnaView(true);
      } else if (step.stepName === 'paymentViewLoaded') {
        console.log('Klarna view ready');
      }
    }
  });

  await manager.start();
};

// Render Klarna payment view
const KlarnaCheckout = () => (
  <View style={{ flex: 1 }}>
    <PrimerKlarnaPaymentView
      style={{ width: '100%', height: 600 }}
      onLoad={() => console.log('Klarna view loaded')}
      onError={(error) => console.error('Klarna error:', error)}
    />
  </View>
);
```

--------------------------------

### Vault Manager: Fetch, Delete, and Pay with Saved Payment Methods in React Native

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Demonstrates how to use the VaultManager from '@primer-io/react-native' to fetch, delete, and pay with saved payment methods. It requires the VaultManager to be imported and configured before use. Outputs include the number of saved methods, their types and IDs, and payment status logs.

```javascript
import { VaultManager } from '@primer-io/react-native';

// Fetch and display saved payment methods
const loadVaultedPaymentMethods = async () => {
  try {
    const vaultManager = new VaultManager();

    // Configure vault manager
    await vaultManager.configure();

    // Fetch saved payment methods
    const vaultedMethods = await vaultManager.fetchVaultedPaymentMethods();

    console.log(`Found ${vaultedMethods.length} saved payment methods`);

    vaultedMethods.forEach(method => {
      console.log(`Method: ${method.paymentMethodType}`);
      console.log(`ID: ${method.id}`);
      console.log(`Last 4: ${method.paymentInstrumentData?.last4Digits}`);
    });

    setVaultedPaymentMethods(vaultedMethods);

  } catch (error) {
    console.error('Failed to load vaulted methods:', error);
  }
};

// Delete a saved payment method
const deletePaymentMethod = async (methodId: string) => {
  try {
    const vaultManager = new VaultManager();
    await vaultManager.configure();
    await vaultManager.deleteVaultedPaymentMethod(methodId);
    console.log('Payment method deleted');
    await loadVaultedPaymentMethods(); // Refresh list
  } catch (error) {
    console.error('Failed to delete payment method:', error);
  }
};

// Pay with saved payment method
const payWithVaultedMethod = async (methodId: string) => {
  try {
    const vaultManager = new VaultManager();
    await vaultManager.configure();

    // Validate CVV for card payments
    const additionalData = { cvv: '123' };
    const errors = await vaultManager.validate(methodId, additionalData);

    if (errors.length > 0) {
      console.error('Validation errors:', errors);
      return;
    }

    // Start payment flow
    await vaultManager.startPaymentFlow(methodId, additionalData);
    console.log('Payment flow started');

  } catch (error) {
    console.error('Payment error:', error);
  }
};

```

--------------------------------

### Configure Apple Pay in React Native using Primer SDK

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Configures Apple Pay as a payment method within the Primer SDK. This involves setting merchant details, billing and shipping address requirements, and network checks. The `PrimerSettings` type from `@primer-io/react-native` is used. An `onCheckoutComplete` callback is provided to handle post-payment actions.

```javascript
import { PrimerSettings } from '@primer-io/react-native';

const settings: PrimerSettings = {
  paymentMethodOptions: {
    applePayOptions: {
      merchantIdentifier: 'merchant.com.yourcompany.app',
      merchantName: 'Your Company',
      isCaptureBillingAddressEnabled: true,
      checkProvidedNetworks: true,
      billingOptions: {
        requiredBillingContactFields: ['postalAddress', 'name', 'emailAddress']
      },
      shippingOptions: {
        shippingContactFields: ['postalAddress', 'phoneNumber'],
        requireShippingMethod: true
      }
    }
  },
  onCheckoutComplete: (checkoutData) => {
    console.log('Apple Pay payment complete:', checkoutData.payment?.id);
  }
};

await Primer.configure(settings);
```

--------------------------------

### Configure Raw Data Manager for Custom Card Payment in React Native

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Configures and utilizes the Raw Data Manager for handling custom payment data, specifically for card payments. It includes setting up metadata and validation callbacks, retrieving required input fields, setting card data, submitting the payment, and cleaning up resources. This is useful for building custom payment forms.

```javascript
import { RawDataManager } from '@primer-io/react-native';

// Configure raw data manager for custom card form
const configureCardPayment = async () => {
  try {
    const manager = new RawDataManager();

    await manager.configure({
      paymentMethodType: 'PAYMENT_CARD',
      onMetadataChange: (metadata) => {
        console.log('Card metadata:', metadata);
        setCardBrand(metadata?.cardNetwork);
      },
      onValidation: (isValid, errors) => {
        console.log('Validation:', isValid);
        if (errors) {
          errors.forEach(error => console.error(error.description));
        }
        setIsFormValid(isValid);
      }
    });

    // Get required input fields
    const requiredFields = await manager.getRequiredInputElementTypes();
    console.log('Required fields:', requiredFields);

    // Set card data
    const cardData = {
      cardNumber: '4242424242424242',
      expiryDate: '12/25',
      cvv: '123',
      cardholderName: 'John Doe'
    };

    await manager.setRawData(cardData);

    // Submit payment
    await manager.submit();

    // Clean up
    await manager.cleanUp();

  } catch (error) {
    console.error('Card payment error:', error);
  }
};

```

--------------------------------

### Run Android Unit Tests with Coverage using Fastlane

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/fastlane/README.md

Executes the 'run_unit_tests_coverage' action for the Android platform using Fastlane. This command runs unit tests and generates a code coverage report for the Android application. Requires a correctly configured Android project and testing framework.

```sh
[bundle exec] fastlane android run_unit_tests_coverage
```

--------------------------------

### Release iOS QA Build with Fastlane

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/fastlane/README.md

Executes the 'qa_release' action for the iOS platform using Fastlane. This command is used to build and distribute a quality assurance (QA) version of the iOS application. It typically involves code signing and deployment configurations.

```sh
[bundle exec] fastlane ios qa_release
```

--------------------------------

### Run iOS Tests with Fastlane

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/fastlane/README.md

Executes the 'tests' action for the iOS platform using Fastlane. This command is typically used to run unit and integration tests for an iOS application. It requires a correctly configured Fastlane environment.

```sh
[bundle exec] fastlane ios tests
```

--------------------------------

### Configure Primer SDK Error Handling in React Native

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Sets up a global error handler for the Primer SDK. It logs detailed error information and provides specific user-facing messages and recovery suggestions based on the error type. Dependencies include `@primer-io/react-native`. The handler receives `PrimerError`, `checkoutData`, and `ErrorHandler` objects as input.

```javascript
import { Primer, PrimerError, ErrorHandler } from '@primer-io/react-native';

// Configure error handling
const settings = {
  onError: (error: PrimerError, checkoutData, handler: ErrorHandler) => {
    console.log('Error ID:', error.errorId);
    console.log('Error Code:', error.errorCode);
    console.log('Description:', error.description);
    console.log('Recovery:', error.recoverySuggestion);
    console.log('Diagnostics ID:', error.diagnosticsId);

    // Handle specific error types
    switch (error.errorId) {
      case 'invalid-client-token':
        Alert.alert(
          'Session Expired',
          'Your payment session has expired. Please try again.',
          [{ text: 'OK', onPress: () => restartCheckout() }]
        );
        break;

      case 'payment-failed':
        const message = error.description || 'Payment was declined';
        Alert.alert('Payment Failed', message);
        handler?.showErrorMessage(message);
        break;

      case 'network-error':
        Alert.alert(
          'Connection Error',
          'Please check your internet connection and try again.'
        );
        break;

      default:
        Alert.alert('Error', error.description);
        handler?.showErrorMessage(error.description);
    }

    // Log to analytics
    logAnalytics('payment_error', {
      errorId: error.errorId,
      errorCode: error.errorCode,
      diagnosticsId: error.diagnosticsId
    });
  }
};

await Primer.configure(settings);
```

--------------------------------

### Perform iOS Danger Check with Fastlane

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/fastlane/README.md

Executes the 'danger_check' action for the iOS platform using Fastlane. This command integrates Danger, a tool for automated code review, into the CI/CD pipeline. It requires Danger to be set up in the project.

```sh
[bundle exec] fastlane ios danger_check
```

--------------------------------

### Payment Resume Handler: Resume Payments Requiring Additional Authentication in React Native

Source: https://context7.com/primer-io/primer-sdk-react-native/llms.txt

Sets up PrimerSettings to handle payment resume flows, specifically for scenarios like 3DS or redirects. It utilizes the onResumeSuccess and onResumePending callbacks. The onResumeSuccess function sends a resume token to a backend API for authorization and handles success, failure, or continuation with a new client token. The onResumePending callback logs pending payment information.

```javascript
import { PrimerSettings, ResumeHandler } from '@primer-io/react-native';

// Handle payment resume flow (3DS, redirects)
const settings: PrimerSettings = {
  onResumeSuccess: async (resumeToken, handler) => {
    try {
      console.log('Payment requires resume with token:', resumeToken);

      // Send resume token to backend
      const response = await fetch('https://your-api.com/payments/resume', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          resumeToken: resumeToken,
          paymentId: currentPaymentId
        })
      });

      const result = await response.json();

      if (result.status === 'AUTHORIZED') {
        // Payment completed successfully
        handler.handleSuccess();
      } else if (result.requiresNewClientToken) {
        // Continue with new client token for additional steps
        handler.continueWithNewClientToken(result.clientToken);
      } else {
        // Payment failed
        handler.handleFailure('Payment authorization failed');
      }

    } catch (error) {
      console.error('Resume error:', error);
      handler.handleFailure(error.message);
    }
  },
  onResumePending: (additionalInfo) => {
    console.log('Payment pending:', additionalInfo);
    // Show pending state to user
  }
};

```

--------------------------------

### Verify Code with TypeScript and ESLint

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/CONTRIBUTING.md

Runs TypeScript for type checking and ESLint for code linting to ensure code quality and adherence to standards. These checks are crucial before committing changes.

```sh
yarn typescript
yarn lint
```

--------------------------------

### Run iOS UI Tests with Fastlane

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/fastlane/README.md

Executes the 'ui_tests' action for the iOS platform using Fastlane. This command is used to run UI automation tests for an iOS application. It requires a correctly configured Fastlane environment and UI test targets.

```sh
[bundle exec] fastlane ios ui_tests
```

--------------------------------

### Fix Formatting Errors with ESLint

Source: https://github.com/primer-io/primer-sdk-react-native/blob/master/CONTRIBUTING.md

Automatically fixes code formatting issues identified by ESLint. This command helps maintain consistent code style across the project.

```sh
yarn lint --fix
```

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