Collecting payments

Prepare your application and backend to collect payments using the Stripe Terminal SDK.

Collecting payments with Stripe Terminal requires writing a payment flow in your application. Use the Stripe Terminal SDK to create and update a PaymentIntent, an object representing a single payment session.

Designed to be robust to failures, the Terminal integration splits the payment process into several steps, each of which can be retried safely:

Create a PaymentIntent
Collect a payment method
Process the payment
Capture the PaymentIntent

Authorization on the customer’s card takes place in Step 3, when the SDK processes the payment.

Step 1: Create a Payment Intent Client-side Server-side

The first step in collecting payments is starting the payment flow. When a customer begins checking out, your application must create a PaymentIntent object. This represents a new payment session on Stripe.

With the iOS and Android SDKs, you can create a PaymentIntent on the client or server. The JavaScript SDK only supports server-side creation.

Use test amounts to try producing different results. An amount ending in 00 results in an approved payment.

Client-side

Create a PaymentIntent from your client using the iOS or Android SDK:

      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


import UIKit
import StripeTerminal

class PaymentViewController: UIViewController {

    // ...

    // Action for a "Checkout" button
    func checkoutAction() {
        let params = PaymentIntentParameters(amount: 1000, currency: "usd")
        Terminal.shared.createPaymentIntent(params) { createResult, createError in
            if let error = createError {
                print("createPaymentIntent failed: (error)")
            }
            else if let paymentIntent = createResult {
                print("createPaymentIntent succeeded")
                // ...
            }

        }
    }

    // ...
}
      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


import UIKit
import StripeTerminal

class PaymentViewController: UIViewController {

    // ...

    // Action for a "Checkout" button
    func checkoutAction() {
        let params = PaymentIntentParameters(amount: 1000, currency: "usd")
        Terminal.shared.createPaymentIntent(params) { createResult, createError in
            if let error = createError {
                print("createPaymentIntent failed: (error)")
            }
            else if let paymentIntent = createResult {
                print("createPaymentIntent succeeded")
                // ...
            }

        }
    }

    // ...
}

      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


#import "APPPaymentViewController.h"
#import <StripeTerminal/StripeTerminal.h>

// ...

@implementation APPPaymentViewController

// Action for a "Checkout" button
- (void)checkoutAction {
    SCPPaymentIntentParameters *params = [[SCPPaymentIntentParameters alloc] initWithAmount:1000
                                                                                   currency:"usd"];
    [[SCPTerminal shared] createPaymentIntent:params completion:^(SCPPaymentIntent *createResult, NSError *createError) {
        if (createError) {
            NSLog(@"createPaymentIntent failed: %@", createError);
        } else {
            NSLog(@"createPaymentIntent succeeded");
            // ...
        }
    }];
}

// ...

@end
      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


#import "APPPaymentViewController.h"
#import <StripeTerminal/StripeTerminal.h>

// ...

@implementation APPPaymentViewController

// Action for a "Checkout" button
- (void)checkoutAction {
    SCPPaymentIntentParameters *params = [[SCPPaymentIntentParameters alloc] initWithAmount:1000
                                                                                   currency:"usd"];
    [[SCPTerminal shared] createPaymentIntent:params completion:^(SCPPaymentIntent *createResult, NSError *createError) {
        if (createError) {
            NSLog(@"createPaymentIntent failed: %@", createError);
        } else {
            NSLog(@"createPaymentIntent succeeded");
            // ...
        }
    }];
}

// ...

@end

PaymentIntentParameters params = new PaymentIntentParameters.Builder()
  .setAmount(100)
  .setCurrency("usd")
  .build();
Terminal.getInstance().createPaymentIntent(params, new PaymentIntentCallback() {
    @Override
    public void onSuccess(PaymentIntent paymentIntent) {
      // Placeholder for collecting a payment method with paymentIntent
    }

    @Override
    public void onFailure(TerminalException exception) {
      // Placeholder for handling exception
    }
  }
})
PaymentIntentParameters params = new PaymentIntentParameters.Builder()
  .setAmount(100)
  .setCurrency("usd")
  .build();
Terminal.getInstance().createPaymentIntent(params, new PaymentIntentCallback() {
    @Override
    public void onSuccess(PaymentIntent paymentIntent) {
      // Placeholder for collecting a payment method with paymentIntent
    }

    @Override
    public void onFailure(TerminalException exception) {
      // Placeholder for handling exception
    }
  }
})

val params = PaymentIntentParameters.Builder()
  .setAmount(100)
  .setCurrency("usd")
  .build()
Terminal.getInstance().createPaymentIntent(params, object: PaymentIntentCallback {
  override fun onSuccess(paymentIntent: PaymentIntent) {
    // Placeholder for collecting a payment method with paymentIntent
  }

  override fun onFailure(exception: TerminalException) {
    // Placeholder for handling exception
  }
})
val params = PaymentIntentParameters.Builder()
  .setAmount(100)
  .setCurrency("usd")
  .build()
Terminal.getInstance().createPaymentIntent(params, object: PaymentIntentCallback {
  override fun onSuccess(paymentIntent: PaymentIntent) {
    // Placeholder for collecting a payment method with paymentIntent
  }

  override fun onFailure(exception: TerminalException) {
    // Placeholder for handling exception
  }
})

Server-side

The JavaScript SDK requires you to create the PaymentIntent on your server. For iOS or Android, you might choose to create the PaymentIntent on your server if the information required to start a payment isn’t readily available in your app.

The following example shows how to create a PaymentIntent on your server:

curl https://api.stripe.com/v1/payment_intents \
  -u sk_test_4eC39HqLyjWDarjtT1zdp7dc: \
  -d amount=1000 \
  -d currency=usd \
  -d "payment_method_types[]"=card_present \
  -d capture_method=manual
curl https://api.stripe.com/v1/payment_intents \
  -u sk_test_4eC39HqLyjWDarjtT1zdp7dc: \
  -d amount=1000 \
  -d currency=usd \
  -d "payment_method_types[]"=card_present \
  -d capture_method=manual

# Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys
Stripe.api_key = 'sk_test_4eC39HqLyjWDarjtT1zdp7dc'

intent = Stripe::PaymentIntent.create({
  amount: 1000,
  currency: 'usd',
  payment_method_types: ['card_present'],
  capture_method: 'manual',
})
# Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys
Stripe.api_key = 'sk_test_4eC39HqLyjWDarjtT1zdp7dc'

intent = Stripe::PaymentIntent.create({
  amount: 1000,
  currency: 'usd',
  payment_method_types: ['card_present'],
  capture_method: 'manual',
})

# Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys
stripe.api_key = 'sk_test_4eC39HqLyjWDarjtT1zdp7dc'

intent = stripe.PaymentIntent.create(
  amount=1000,
  currency='usd',
  payment_method_types=['card_present'],
  capture_method='manual'
)
# Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys
stripe.api_key = 'sk_test_4eC39HqLyjWDarjtT1zdp7dc'

intent = stripe.PaymentIntent.create(
  amount=1000,
  currency='usd',
  payment_method_types=['card_present'],
  capture_method='manual'
)

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
\Stripe\Stripe::setApiKey('sk_test_4eC39HqLyjWDarjtT1zdp7dc');

$intent = \Stripe\PaymentIntent::create([
  'amount' => 1000,
  'currency' => 'usd',
  'payment_method_types' => ['card_present'],
  'capture_method' => 'manual',
]);
// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
\Stripe\Stripe::setApiKey('sk_test_4eC39HqLyjWDarjtT1zdp7dc');

$intent = \Stripe\PaymentIntent::create([
  'amount' => 1000,
  'currency' => 'usd',
  'payment_method_types' => ['card_present'],
  'capture_method' => 'manual',
]);

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
Stripe.apiKey = "sk_test_4eC39HqLyjWDarjtT1zdp7dc";

PaymentIntentCreateParams params =
  PaymentIntentCreateParams.builder()
    .addPaymentMethodType("card_present")
    .setAmount(1000L)
    .setCurrency("usd")
    .setCaptureMethod(PaymentIntentCreateParams.CaptureMethod.MANUAL)
    .build();

PaymentIntent intent = PaymentIntent.create(params);
// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
Stripe.apiKey = "sk_test_4eC39HqLyjWDarjtT1zdp7dc";

PaymentIntentCreateParams params =
  PaymentIntentCreateParams.builder()
    .addPaymentMethodType("card_present")
    .setAmount(1000L)
    .setCurrency("usd")
    .setCaptureMethod(PaymentIntentCreateParams.CaptureMethod.MANUAL)
    .build();

PaymentIntent intent = PaymentIntent.create(params);

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
const stripe = require('stripe')('sk_test_4eC39HqLyjWDarjtT1zdp7dc');

const intent = await stripe.paymentIntents.create({
  amount: 1000,
  currency: 'usd',
  payment_method_types: ['card_present'],
  capture_method: 'manual',
});
// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
const stripe = require('stripe')('sk_test_4eC39HqLyjWDarjtT1zdp7dc');

const intent = await stripe.paymentIntents.create({
  amount: 1000,
  currency: 'usd',
  payment_method_types: ['card_present'],
  capture_method: 'manual',
});

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
stripe.Key = "sk_test_4eC39HqLyjWDarjtT1zdp7dc"

params := &stripe.PaymentIntentParams{
  Amount: stripe.Int64(1000),
  Currency: stripe.String(string(stripe.CurrencyUSD)),
  PaymentMethodTypes: stripe.StringSlice([]string{
    "card_present",
  }),
  CaptureMethod: stripe.String("manual"),
}
pi, _ := paymentintent.New(params)
// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
stripe.Key = "sk_test_4eC39HqLyjWDarjtT1zdp7dc"

params := &stripe.PaymentIntentParams{
  Amount: stripe.Int64(1000),
  Currency: stripe.String(string(stripe.CurrencyUSD)),
  PaymentMethodTypes: stripe.StringSlice([]string{
    "card_present",
  }),
  CaptureMethod: stripe.String("manual"),
}
pi, _ := paymentintent.New(params)

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
StripeConfiguration.ApiKey = "sk_test_4eC39HqLyjWDarjtT1zdp7dc";

var service = new PaymentIntentService();
var options = new PaymentIntentCreateOptions
{
    Amount = 1000,
    Currency = "usd",
    PaymentMethodTypes = new List<string> { "card_present" },
    CaptureMethod = "manual",
};
var intent = service.Create(options);
// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
StripeConfiguration.ApiKey = "sk_test_4eC39HqLyjWDarjtT1zdp7dc";

var service = new PaymentIntentService();
var options = new PaymentIntentCreateOptions
{
    Amount = 1000,
    Currency = "usd",
    PaymentMethodTypes = new List<string> { "card_present" },
    CaptureMethod = "manual",
};
var intent = service.Create(options);

For Terminal payments, the payment_method_types parameter must include card_present. The capture_method must be set to manual for all card_present PaymentIntents to precisely control the payment flow.

The PaymentIntent contains a client secret, a key that is unique to the individual PaymentIntent. To use the client secret, you must obtain it from the PaymentIntent on your server and pass it to the client side.

get '/secret' do
  intent = # ... Create or retrieve the PaymentIntent
  {client_secret: intent.client_secret}.to_json
end
get '/secret' do
  intent = # ... Create or retrieve the PaymentIntent
  {client_secret: intent.client_secret}.to_json
end

from flask import jsonify

@app.route('/secret')
def secret():
  intent = # ... Create or retrieve the PaymentIntent
  return jsonify(client_secret=intent.client_secret)
from flask import jsonify

@app.route('/secret')
def secret():
  intent = # ... Create or retrieve the PaymentIntent
  return jsonify(client_secret=intent.client_secret)

<?php
    $intent = # ... Create or retrieve the PaymentIntent
    echo json_encode(array('client_secret' => $intent->client_secret));
?>
<?php
    $intent = # ... Create or retrieve the PaymentIntent
    echo json_encode(array('client_secret' => $intent->client_secret));
?>

import java.util.HashMap;
import java.util.Map;

import com.stripe.model.PaymentIntent;

import com.google.gson.Gson;
import static spark.Spark.get;

public class StripeJavaQuickStart {
    public static void main(String[] args) {
      Gson gson = new Gson();

      get("/secret", (request, response) -> {
        PaymentIntent intent = // ... Fetch or create the PaymentIntent

        Map<String, String> map = new HashMap();
        map.put("client_secret", intent.getClientSecret());

        return map;
      }, gson::toJson);
    }
}
import java.util.HashMap;
import java.util.Map;

import com.stripe.model.PaymentIntent;

import com.google.gson.Gson;
import static spark.Spark.get;

public class StripeJavaQuickStart {
    public static void main(String[] args) {
      Gson gson = new Gson();

      get("/secret", (request, response) -> {
        PaymentIntent intent = // ... Fetch or create the PaymentIntent

        Map<String, String> map = new HashMap();
        map.put("client_secret", intent.getClientSecret());

        return map;
      }, gson::toJson);
    }
}

const express = require('express');
const app = express();

app.get('/secret', async (req, res) => {
  const intent = // ... Fetch or create the PaymentIntent
  res.json({client_secret: intent.client_secret});
});

app.listen(3000, () => {
  console.log('Running on port 3000');
});
const express = require('express');
const app = express();

app.get('/secret', async (req, res) => {
  const intent = // ... Fetch or create the PaymentIntent
  res.json({client_secret: intent.client_secret});
});

app.listen(3000, () => {
  console.log('Running on port 3000');
});

package main

import (
  "encoding/json"
  "net/http"
)

type PaymentData struct {
  ClientSecret string `json:"client_secret"`
}

func main() {
  http.HandleFunc("/secret", func(w http.ResponseWriter, r *http.Request) {
    intent := // ... Fetch or create the PaymentIntent
    data := PaymentData{
      ClientSecret: intent.ClientSecret,
    }
    w.Header().Set("Content-Type", "application/json")
    w.WriteHeader(http.StatusOK)
    json.NewEncoder(w).Encode(data)
  })

  http.ListenAndServe(":3000", nil)
}
package main

import (
  "encoding/json"
  "net/http"
)

type PaymentData struct {
  ClientSecret string `json:"client_secret"`
}

func main() {
  http.HandleFunc("/secret", func(w http.ResponseWriter, r *http.Request) {
    intent := // ... Fetch or create the PaymentIntent
    data := PaymentData{
      ClientSecret: intent.ClientSecret,
    }
    w.Header().Set("Content-Type", "application/json")
    w.WriteHeader(http.StatusOK)
    json.NewEncoder(w).Encode(data)
  })

  http.ListenAndServe(":3000", nil)
}

using System;
using Microsoft.AspNetCore.Mvc;

namespace StripeExampleApi.Controllers
{
    [Route("secret")]
    [ApiController]
    public class StripeApiController : Controller
    {
        [HttpGet]
        public ActionResult Get()
        {
            var intent = // ... Fetch or create the PaymentIntent
            return Json(new {client_secret = intent.ClientSecret});
        }
    }
}
using System;
using Microsoft.AspNetCore.Mvc;

namespace StripeExampleApi.Controllers
{
    [Route("secret")]
    [ApiController]
    public class StripeApiController : Controller
    {
        [HttpGet]
        public ActionResult Get()
        {
            var intent = // ... Fetch or create the PaymentIntent
            return Json(new {client_secret = intent.ClientSecret});
        }
    }
}

For JavaScript, use the client secret as a parameter when calling collectPaymentMethod. For iOS and Android, first use the client secret to call retrievePaymentIntent, and then use the retrieved PaymentIntent to call collectPaymentMethod.

func checkoutButtonAction() {
    // ... Fetch the client secret from your backend
    Terminal.shared.retrievePaymentIntent(clientSecret: clientSecret) { retrieveResult, retrieveError in
        if let error = retrieveError {
            print("retrievePaymentIntent failed: \(error)")
        }
        else if let paymentIntent = retrieveResult {
            print("retrievePaymentIntent succeeded: \(paymentIntent)")
            // ...
        }
    }
}
func checkoutButtonAction() {
    // ... Fetch the client secret from your backend
    Terminal.shared.retrievePaymentIntent(clientSecret: clientSecret) { retrieveResult, retrieveError in
        if let error = retrieveError {
            print("retrievePaymentIntent failed: \(error)")
        }
        else if let paymentIntent = retrieveResult {
            print("retrievePaymentIntent succeeded: \(paymentIntent)")
            // ...
        }
    }
}

// Action for a "Checkout" button
- (void)checkoutAction {
    // ... Fetch the client secret from your backend
    [[SCPTerminal shared] retrievePaymentIntent:clientSecret completion:^(SCPPaymentIntent *retrieveResult, NSError *retrieveError) {
        if (retrieveError) {
            NSLog(@"retrievePaymentIntent failed: %@", retrieveError);
        }
        else {
            NSLog(@"retrievePaymentIntent succeeded");
            // ...
        }
    }];
}
// Action for a "Checkout" button
- (void)checkoutAction {
    // ... Fetch the client secret from your backend
    [[SCPTerminal shared] retrievePaymentIntent:clientSecret completion:^(SCPPaymentIntent *retrieveResult, NSError *retrieveError) {
        if (retrieveError) {
            NSLog(@"retrievePaymentIntent failed: %@", retrieveError);
        }
        else {
            NSLog(@"retrievePaymentIntent succeeded");
            // ...
        }
    }];
}

Terminal.getInstance().retrievePaymentIntent(clientSecret,
  new PaymentIntentCallback() {
    @Override
    public void onSuccess(PaymentIntent paymentIntent) {
      // Placeholder for collecting a payment method with paymentIntent
    }

    @Override
    public void onFailure(TerminalException exception) {
      // Placeholder for handling exception
    }
  }
})
Terminal.getInstance().retrievePaymentIntent(clientSecret,
  new PaymentIntentCallback() {
    @Override
    public void onSuccess(PaymentIntent paymentIntent) {
      // Placeholder for collecting a payment method with paymentIntent
    }

    @Override
    public void onFailure(TerminalException exception) {
      // Placeholder for handling exception
    }
  }
})

Terminal.getInstance().retrievePaymentIntent(clientSecret, object: PaymentIntentCallback {
  override fun onSuccess(paymentIntent: PaymentIntent) {
    // Placeholder for collecting a payment method with paymentIntent
  }

  override fun onFailure(exception: TerminalException) {
    // Placeholder for handling exception
  }
})
Terminal.getInstance().retrievePaymentIntent(clientSecret, object: PaymentIntentCallback {
  override fun onSuccess(paymentIntent: PaymentIntent) {
    // Placeholder for collecting a payment method with paymentIntent
  }

  override fun onFailure(exception: TerminalException) {
    // Placeholder for handling exception
  }
})

Step 2: Collect a payment method Client-side

After you’ve created a PaymentIntent, the next step is to collect a payment method with the SDK.

In order to collect a payment method, your app needs to be connected to a reader. The connected reader will wait for a card to be presented after your app calls collectPaymentMethod.

function checkout() {
  // clientSecret is the client_secret from the PaymentIntent you created in Step 1.
  terminal.collectPaymentMethod(clientSecret).then(function(result) {
    if (result.error) {
      // Placeholder for handling result.error
    } else {
      // Placeholder for processing result.paymentIntent
    }
  });
}
function checkout() {
  // clientSecret is the client_secret from the PaymentIntent you created in Step 1.
  terminal.collectPaymentMethod(clientSecret).then(function(result) {
    if (result.error) {
      // Placeholder for handling result.error
    } else {
      // Placeholder for processing result.paymentIntent
    }
  });
}

async () => {
  // clientSecret is the client_secret from the PaymentIntent you created in Step 1.
  const result = await terminal.collectPaymentMethod(clientSecret);
  if (result.error) {
    // Placeholder for handling result.error
  } else {
    // Placeholder for processing result.paymentIntent
  }
}
async () => {
  // clientSecret is the client_secret from the PaymentIntent you created in Step 1.
  const result = await terminal.collectPaymentMethod(clientSecret);
  if (result.error) {
    // Placeholder for handling result.error
  } else {
    // Placeholder for processing result.paymentIntent
  }
}

      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


import UIKit
import StripeTerminal

class PaymentViewController: UIViewController, ReaderDisplayDelegate {

    // Label for displaying messages from the card reader
    let readerMessageLabel = UILabel(frame: .zero)
    var collectCancelable: Cancelable? = nil

    // ...

    // Action for a "Checkout" button
    func checkoutAction() {
        let params = PaymentIntentParameters(amount: 1000, currency: "usd")
        Terminal.shared.createPaymentIntent(params) { createResult, createError in
            if let error = createError {
                print("createPaymentIntent failed: (error)")
            }
            else if let paymentIntent = createResult {
                print("createPaymentIntent succeeded")
                self.collectCancelable = Terminal.shared.collectPaymentMethod(paymentIntent, delegate: self) { collectResult, collectError in
                    if let error = collectError {
                        print("collectPaymentMethod failed: (error)")
                    }
                    else if let paymentIntent = collectResult {
                        print("collectPaymentMethod succeeded")
                        // ... Process the payment
                    }
                }
            }

        }
    }
 }

 // MARK: ReaderDisplayDelegate

 func terminal(_ terminal: Terminal, didRequestReaderInput inputOptions: ReaderInputOptions = []) {
     readerMessageLabel.text = Terminal.stringFromReaderInputOptions(inputOptions)
 }

 func terminal(_ terminal: Terminal, didRequestReaderDisplayMessage displayMessage: ReaderDisplayMessage) {
     readerMessageLabel.text = Terminal.stringFromReaderDisplayMessage(displayMessage)
 }
      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


import UIKit
import StripeTerminal

class PaymentViewController: UIViewController, ReaderDisplayDelegate {

    // Label for displaying messages from the card reader
    let readerMessageLabel = UILabel(frame: .zero)
    var collectCancelable: Cancelable? = nil

    // ...

    // Action for a "Checkout" button
    func checkoutAction() {
        let params = PaymentIntentParameters(amount: 1000, currency: "usd")
        Terminal.shared.createPaymentIntent(params) { createResult, createError in
            if let error = createError {
                print("createPaymentIntent failed: (error)")
            }
            else if let paymentIntent = createResult {
                print("createPaymentIntent succeeded")
                self.collectCancelable = Terminal.shared.collectPaymentMethod(paymentIntent, delegate: self) { collectResult, collectError in
                    if let error = collectError {
                        print("collectPaymentMethod failed: (error)")
                    }
                    else if let paymentIntent = collectResult {
                        print("collectPaymentMethod succeeded")
                        // ... Process the payment
                    }
                }
            }

        }
    }
 }

 // MARK: ReaderDisplayDelegate

 func terminal(_ terminal: Terminal, didRequestReaderInput inputOptions: ReaderInputOptions = []) {
     readerMessageLabel.text = Terminal.stringFromReaderInputOptions(inputOptions)
 }

 func terminal(_ terminal: Terminal, didRequestReaderDisplayMessage displayMessage: ReaderDisplayMessage) {
     readerMessageLabel.text = Terminal.stringFromReaderDisplayMessage(displayMessage)
 }

      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


#import "APPPaymentViewController.h"
#import <StripeTerminal/StripeTerminal.h>

@interface APPPaymentViewController () <SCPReaderDisplayDelegate>

// Label for displaying messages from the card reader
@property (nonatomic, nullable, strong) UILabel *readerMessageLabel;
@property (nonatomic, nullable, strong) SCPCancelable *collectCancelable;

@end

@implementation APPPaymentViewController

// ...

// Action for a "Checkout" button
- (void)checkoutAction {
    SCPPaymentIntentParameters *params = [[SCPPaymentIntentParameters alloc] initWithAmount:1000
                                                                                   currency:@"usd"];
    [[SCPTerminal shared] createPaymentIntent:params completion:^(SCPPaymentIntent *createResult, NSError *createError) {
        if (createError) {
            NSLog(@"createPaymentIntent failed: %@", createError);
        } else {
            NSLog(@"createPaymentIntent succeeded");
            self.collectCancelable = [[SCPTerminal shared] collectPaymentMethod:createResult delegate:self completion:^(SCPPaymentIntent *collectResult, NSError *collectError) {
                if (collectError) {
                    NSLog(@"collectPaymentMethod failed: %@", collectError);
                }
                else {
                    NSLog(@"collectPaymentMethod succeeded");
                    // ... Process the payment
                }
            }];
        }
    }];
}
)

#pragma mark - SCPReaderDisplayDelegate

- (void)terminal:(SCPTerminal *)terminal didRequestReaderInput:(SCPReaderInputOptions)inputOptions {
    self.readerMessageLabel.text = [SCPTerminal stringFromReaderInputOptions:inputOptions];
}

- (void)terminal:(SCPTerminal *)terminal didRequestReaderDisplayMessage:(SCPReaderDisplayMessage)displayMessage {
    self.readerMessageLabel.text = [SCPTerminal stringFromReaderDisplayMessage:displayMessage];
}
      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


#import "APPPaymentViewController.h"
#import <StripeTerminal/StripeTerminal.h>

@interface APPPaymentViewController () <SCPReaderDisplayDelegate>

// Label for displaying messages from the card reader
@property (nonatomic, nullable, strong) UILabel *readerMessageLabel;
@property (nonatomic, nullable, strong) SCPCancelable *collectCancelable;

@end

@implementation APPPaymentViewController

// ...

// Action for a "Checkout" button
- (void)checkoutAction {
    SCPPaymentIntentParameters *params = [[SCPPaymentIntentParameters alloc] initWithAmount:1000
                                                                                   currency:@"usd"];
    [[SCPTerminal shared] createPaymentIntent:params completion:^(SCPPaymentIntent *createResult, NSError *createError) {
        if (createError) {
            NSLog(@"createPaymentIntent failed: %@", createError);
        } else {
            NSLog(@"createPaymentIntent succeeded");
            self.collectCancelable = [[SCPTerminal shared] collectPaymentMethod:createResult delegate:self completion:^(SCPPaymentIntent *collectResult, NSError *collectError) {
                if (collectError) {
                    NSLog(@"collectPaymentMethod failed: %@", collectError);
                }
                else {
                    NSLog(@"collectPaymentMethod succeeded");
                    // ... Process the payment
                }
            }];
        }
    }];
}
)

#pragma mark - SCPReaderDisplayDelegate

- (void)terminal:(SCPTerminal *)terminal didRequestReaderInput:(SCPReaderInputOptions)inputOptions {
    self.readerMessageLabel.text = [SCPTerminal stringFromReaderInputOptions:inputOptions];
}

- (void)terminal:(SCPTerminal *)terminal didRequestReaderDisplayMessage:(SCPReaderDisplayMessage)displayMessage {
    self.readerMessageLabel.text = [SCPTerminal stringFromReaderDisplayMessage:displayMessage];
}

Cancelable cancelable = Terminal.getInstance().collectPaymentMethod(paymentIntent,
  new MyReaderListener(),
  new PaymentIntentCallback() {
    @Override
    public void onSuccess(PaymentIntent paymentIntent) {
      // Placeholder for processing paymentIntent
    }

    @Override
    public void onFailure(TerminalException exception) {
      // Placeholder for handling exception
    }
  });
Cancelable cancelable = Terminal.getInstance().collectPaymentMethod(paymentIntent,
  new MyReaderListener(),
  new PaymentIntentCallback() {
    @Override
    public void onSuccess(PaymentIntent paymentIntent) {
      // Placeholder for processing paymentIntent
    }

    @Override
    public void onFailure(TerminalException exception) {
      // Placeholder for handling exception
    }
  });

val cancelable = Terminal.getInstance().collectPaymentMethod(paymentIntent, MyReaderListener(),
  object : PaymentIntentCallback {
  override fun onSuccess(paymentIntent: PaymentIntent) {
    // Placeholder for processing paymentIntent
  }

  override fun onFailure(exception: TerminalException) {
    // Placeholder for handling exception
  }
})
val cancelable = Terminal.getInstance().collectPaymentMethod(paymentIntent, MyReaderListener(),
  object : PaymentIntentCallback {
  override fun onSuccess(paymentIntent: PaymentIntent) {
    // Placeholder for processing paymentIntent
  }

  override fun onFailure(exception: TerminalException) {
    // Placeholder for handling exception
  }
})

This method collects encrypted payment method data using the connected card reader, and associates the encrypted data with the local PaymentIntent.

You can cancel collecting a payment method using the Cancelable object returned by the iOS or Android SDK, or calling cancelCollectPaymentMethod in the JavaScript SDK.

Handling events

When collecting a payment method using a reader like the BBPOS Chipper 2X BT, without a built-in display, your app must be able to display events from the payment method collection process to users. These events help users successfully collect payments (e.g., retrying a card, trying a different card, or using a different read method).

When a transaction begins, the SDK passes a ReaderInputOptions value to your app’s reader display handler, denoting the acceptable types of input (e.g., Swipe, Insert, Tap). In your app’s checkout UI, prompt the user to present a card using one of these options.

During the transaction, the SDK might request your app to display additional prompts (e.g., Retry Card) to your user by passing a ReaderDisplayMessage value to your app’s reader display handler. Make sure your checkout UI displays these messages to the user.

// MARK: ReaderDisplayDelegate

func terminal(_ terminal: Terminal, didRequestReaderInput inputOptions: ReaderInputOptions = []) {
    readerMessageLabel.text = Terminal.stringFromReaderInputOptions(inputOptions)
}

func terminal(_ terminal: Terminal, didRequestReaderDisplayMessage displayMessage: ReaderDisplayMessage) {
    readerMessageLabel.text = Terminal.stringFromReaderDisplayMessage(displayMessage)
}
// MARK: ReaderDisplayDelegate

func terminal(_ terminal: Terminal, didRequestReaderInput inputOptions: ReaderInputOptions = []) {
    readerMessageLabel.text = Terminal.stringFromReaderInputOptions(inputOptions)
}

func terminal(_ terminal: Terminal, didRequestReaderDisplayMessage displayMessage: ReaderDisplayMessage) {
    readerMessageLabel.text = Terminal.stringFromReaderDisplayMessage(displayMessage)
}

#pragma mark - SCPReaderDisplayDelegate

- (void)terminal:(SCPTerminal *)terminal didRequestReaderInput:(SCPReaderInputOptions)inputOptions {
    self.readerMessageLabel.text = [SCPTerminal stringFromReaderInputOptions:inputOptions];
}

- (void)terminal:(SCPTerminal *)terminal didRequestReaderDisplayMessage:(SCPReaderDisplayMessage)displayMessage {
    self.readerMessageLabel.text = [SCPTerminal stringFromReaderDisplayMessage:displayMessage];
}
#pragma mark - SCPReaderDisplayDelegate

- (void)terminal:(SCPTerminal *)terminal didRequestReaderInput:(SCPReaderInputOptions)inputOptions {
    self.readerMessageLabel.text = [SCPTerminal stringFromReaderInputOptions:inputOptions];
}

- (void)terminal:(SCPTerminal *)terminal didRequestReaderDisplayMessage:(SCPReaderDisplayMessage)displayMessage {
    self.readerMessageLabel.text = [SCPTerminal stringFromReaderDisplayMessage:displayMessage];
}

@Override
public void onRequestReaderInput(ReaderInputOptions options) {
    // Placeholder for updating your app's checkout UI
    Toast.makeText(getActivity(), options.toString(), Toast.LENGTH_SHORT).show();
}

@Override
public void onRequestReaderDisplayMessage(ReaderDisplayMessage message) {
    Toast.makeText(getActivity(), message.toString(), Toast.LENGTH_SHORT).show();
}
@Override
public void onRequestReaderInput(ReaderInputOptions options) {
    // Placeholder for updating your app's checkout UI
    Toast.makeText(getActivity(), options.toString(), Toast.LENGTH_SHORT).show();
}

@Override
public void onRequestReaderDisplayMessage(ReaderDisplayMessage message) {
    Toast.makeText(getActivity(), message.toString(), Toast.LENGTH_SHORT).show();
}

override fun onRequestReaderInput(options: ReaderInputOptions) {
  // Placeholder for updating your app's checkout UI
  Toast.makeText(activity, options.toString(), Toast.LENGTH_SHORT).show()
}

override fun onRequestReaderDisplayMessage(message: ReaderDisplayMessage) {
  Toast.makeText(activity, message.toString(), Toast.LENGTH_SHORT).show()
}
override fun onRequestReaderInput(options: ReaderInputOptions) {
  // Placeholder for updating your app's checkout UI
  Toast.makeText(activity, options.toString(), Toast.LENGTH_SHORT).show()
}

override fun onRequestReaderDisplayMessage(message: ReaderDisplayMessage) {
  Toast.makeText(activity, message.toString(), Toast.LENGTH_SHORT).show()
}

Step 3: Process the payment Client-side

After successfully collecting a payment method from the customer, the next step is to process the payment with the SDK. You can either process automatically or display a confirmation screen, where the customer can choose to proceed with the payment or cancel (e.g., to pay with cash, or use a different payment method).

When you’re ready to proceed with the payment, call processPayment with the updated PaymentIntent from Step 2. A successful processPayment call will result in a PaymentIntent with a status of requires_capture.

terminal.processPayment(paymentIntent).then(function(result) {
  if (result.error) {
    // Placeholder for handling result.error
  } else if (result.paymentIntent) {
    // Placeholder for notifying your backend to capture result.paymentIntent.id
  }
});
terminal.processPayment(paymentIntent).then(function(result) {
  if (result.error) {
    // Placeholder for handling result.error
  } else if (result.paymentIntent) {
    // Placeholder for notifying your backend to capture result.paymentIntent.id
  }
});

async () => {
  const result = await terminal.processPayment(paymentIntent);
  if (result.error) {
    // Placeholder for handling result.error
  } else if (result.paymentIntent) {
    // Placeholder for notifying your backend to capture result.paymentIntent.id
  }
}
async () => {
  const result = await terminal.processPayment(paymentIntent);
  if (result.error) {
    // Placeholder for handling result.error
  } else if (result.paymentIntent) {
    // Placeholder for notifying your backend to capture result.paymentIntent.id
  }
}

      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


// Action for a "Checkout" button
func checkoutAction() {
    let params = PaymentIntentParameters(amount: 1000, currency: "usd")
    Terminal.shared.createPaymentIntent(params) { createResult, createError in
        if let error = createError {
            print("createPaymentIntent failed: (error)")
        } else if let paymentIntent = createResult {
            print("createPaymentIntent succeeded")
            self.collectCancelable = Terminal.shared.collectPaymentMethod(paymentIntent, delegate: self) { collectResult, collectError in
                if let error = collectError {
                    print("collectPaymentMethod failed: (error)")
                } else if let collectPaymentMethodPaymentIntent = collectResult {
                    print("collectPaymentMethod succeeded")
                    // ... Process the payment
                    Terminal.shared.processPayment(collectPaymentMethodPaymentIntent) { processResult, processError in
                        if let error = processError {
                            print("processPayment failed: (error)")
                        } else if let processPaymentPaymentIntent = processResult {
                            print("processPayment succeeded")
                            // Notify your backend to capture the PaymentIntent
                            APIClient.shared.capturePaymentIntent(processPaymentPaymentIntent.stripeId) { captureError in
                                if let error = captureError {
                                    print("capture failed: (error)")
                                } else {
                                    print("capture succeeded")
                                }
                            }
                        }
                    }
                }
            }
        }
    }
      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


// Action for a "Checkout" button
func checkoutAction() {
    let params = PaymentIntentParameters(amount: 1000, currency: "usd")
    Terminal.shared.createPaymentIntent(params) { createResult, createError in
        if let error = createError {
            print("createPaymentIntent failed: (error)")
        } else if let paymentIntent = createResult {
            print("createPaymentIntent succeeded")
            self.collectCancelable = Terminal.shared.collectPaymentMethod(paymentIntent, delegate: self) { collectResult, collectError in
                if let error = collectError {
                    print("collectPaymentMethod failed: (error)")
                } else if let collectPaymentMethodPaymentIntent = collectResult {
                    print("collectPaymentMethod succeeded")
                    // ... Process the payment
                    Terminal.shared.processPayment(collectPaymentMethodPaymentIntent) { processResult, processError in
                        if let error = processError {
                            print("processPayment failed: (error)")
                        } else if let processPaymentPaymentIntent = processResult {
                            print("processPayment succeeded")
                            // Notify your backend to capture the PaymentIntent
                            APIClient.shared.capturePaymentIntent(processPaymentPaymentIntent.stripeId) { captureError in
                                if let error = captureError {
                                    print("capture failed: (error)")
                                } else {
                                    print("capture succeeded")
                                }
                            }
                        }
                    }
                }
            }
        }
    }

      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


 // Action for a "Checkout" button
- (void)checkoutAction {
    SCPPaymentIntentParameters *params = [[SCPPaymentIntentParameters alloc] initWithAmount:1000
                                                                                   currency:@"usd"];
    [[SCPTerminal shared] createPaymentIntent:params completion:^(SCPPaymentIntent *createResult, NSError *createError) {
        if (createError) {
            NSLog(@"createPaymentIntent failed: %@", createError);
        }
        else {
            NSLog(@"createPaymentIntent succeeded");
            self.collectCancelable = [[SCPTerminal shared] collectPaymentMethod:createResultdelegate:self completion:^(SCPPaymentIntent *collectResult, NSError *collectError) {
                if (collectError) {
                    NSLog(@"collectPaymentMethod failed: %@", collectError);
                }
                else {
                    NSLog(@"collectPaymentMethod succeeded");
                    [[SCPTerminal shared] processPayment:createResult completion:^(SCPPaymentIntent *processResult, SCPProcessPaymentError *processError) {
                        if (processError) {
                            NSLog(@"processPayment failed: %@", processError);
                        }
                        else {
                            NSLog(@"processPayment succeeded");
                            // Notify your backend to capture the PaymentIntent
                            [[APPAPIClient shared] capturePaymentIntent:processResult.stripeId completion:^(NSError *captureError) {
                                if (captureError) {
                                    NSLog(@"capture failed: %@", captureError);
                                }
                                else {
                                    NSLog(@"capture succeeded");
                                }
                            }];
                        }
                    }];
                }
            }];
        }
    }];
}
      # Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys


 // Action for a "Checkout" button
- (void)checkoutAction {
    SCPPaymentIntentParameters *params = [[SCPPaymentIntentParameters alloc] initWithAmount:1000
                                                                                   currency:@"usd"];
    [[SCPTerminal shared] createPaymentIntent:params completion:^(SCPPaymentIntent *createResult, NSError *createError) {
        if (createError) {
            NSLog(@"createPaymentIntent failed: %@", createError);
        }
        else {
            NSLog(@"createPaymentIntent succeeded");
            self.collectCancelable = [[SCPTerminal shared] collectPaymentMethod:createResultdelegate:self completion:^(SCPPaymentIntent *collectResult, NSError *collectError) {
                if (collectError) {
                    NSLog(@"collectPaymentMethod failed: %@", collectError);
                }
                else {
                    NSLog(@"collectPaymentMethod succeeded");
                    [[SCPTerminal shared] processPayment:createResult completion:^(SCPPaymentIntent *processResult, SCPProcessPaymentError *processError) {
                        if (processError) {
                            NSLog(@"processPayment failed: %@", processError);
                        }
                        else {
                            NSLog(@"processPayment succeeded");
                            // Notify your backend to capture the PaymentIntent
                            [[APPAPIClient shared] capturePaymentIntent:processResult.stripeId completion:^(NSError *captureError) {
                                if (captureError) {
                                    NSLog(@"capture failed: %@", captureError);
                                }
                                else {
                                    NSLog(@"capture succeeded");
                                }
                            }];
                        }
                    }];
                }
            }];
        }
    }];
}

Terminal.getInstance().processPayment(paymentIntent,
  new PaymentIntentCallback() {
    @Override
    public void onSuccess(PaymentIntent paymentIntent) {
      // Placeholder for notifying your backend to capture paymentIntent.id
    }

    @Override
    public void onFailure(TerminalException exception) {
      // Placeholder for handling the exception
    }
});
Terminal.getInstance().processPayment(paymentIntent,
  new PaymentIntentCallback() {
    @Override
    public void onSuccess(PaymentIntent paymentIntent) {
      // Placeholder for notifying your backend to capture paymentIntent.id
    }

    @Override
    public void onFailure(TerminalException exception) {
      // Placeholder for handling the exception
    }
});

Terminal.getInstance().processPayment(paymentIntent, object : PaymentIntentCallback {
  override fun onSuccess(paymentIntent: PaymentIntent) {
    // Placeholder for notifying your backend to capture paymentIntent.id
  }

  override fun onFailure(exception: TerminalException) {
    // Placeholder for handling the exception
  }
})
Terminal.getInstance().processPayment(paymentIntent, object : PaymentIntentCallback {
  override fun onSuccess(paymentIntent: PaymentIntent) {
    // Placeholder for notifying your backend to capture paymentIntent.id
  }

  override fun onFailure(exception: TerminalException) {
    // Placeholder for handling the exception
  }
})

Handling processing failures

When processing a PaymentIntent fails, the SDK returns an error that includes the updated PaymentIntent. Your application should inspect the PaymentIntent to decide how to deal with the error.

PaymentIntent Status	Meaning	Resolution
`requires_payment_method`	Payment method declined	Try collecting a different payment method by calling `collectPaymentMethod` again with the same PaymentIntent.
`requires_confirmation`	Temporary connectivity problem	Call `processPayment` again with the same PaymentIntent to retry the request.
PaymentIntent is `nil`	Request to Stripe timed out, unknown PaymentIntent status	Retry processing the original PaymentIntent. Do not create a new one, as that could result in multiple authorizations for the cardholder.

If you encounter multiple, consecutive timeouts, there might be a problem with your connectivity. Make sure that your app is able to communicate with the internet.

Step 4: Capture the Payment Intent Server-side

Stripe Terminal uses a two-step process to prevent unintended and duplicate payments. When the SDK returns a processed PaymentIntent to your app, the payment is authorized but not captured. Read the auth and capture documentation for more information about the difference.

When your app receives a processed PaymentIntent from the SDK, make sure it notifies your backend to capture the PaymentIntent. Create an endpoint on your backend that accepts a PaymentIntent ID and sends a request to the Stripe API to capture it:

curl https://api.stripe.com/v1/payment_intents/pi_4rLuzUSUnb7FVx3JUxs3/capture \
  -u sk_test_4eC39HqLyjWDarjtT1zdp7dc:
curl https://api.stripe.com/v1/payment_intents/pi_4rLuzUSUnb7FVx3JUxs3/capture \
  -u sk_test_4eC39HqLyjWDarjtT1zdp7dc:

# Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys
Stripe.api_key = 'sk_test_4eC39HqLyjWDarjtT1zdp7dc'

intent = Stripe::PaymentIntent.capture(
  'pi_4rLuzUSUnb7FVx3JUxs3'
)
# Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys
Stripe.api_key = 'sk_test_4eC39HqLyjWDarjtT1zdp7dc'

intent = Stripe::PaymentIntent.capture(
  'pi_4rLuzUSUnb7FVx3JUxs3'
)

# Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys
stripe.api_key = 'sk_test_4eC39HqLyjWDarjtT1zdp7dc'

intent = stripe.PaymentIntent.capture(
  'pi_4rLuzUSUnb7FVx3JUxs3'
)
# Set your secret key. Remember to switch to your live secret key in production!
# See your keys here: https://dashboard.stripe.com/account/apikeys
stripe.api_key = 'sk_test_4eC39HqLyjWDarjtT1zdp7dc'

intent = stripe.PaymentIntent.capture(
  'pi_4rLuzUSUnb7FVx3JUxs3'
)

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
\Stripe\Stripe::setApiKey('sk_test_4eC39HqLyjWDarjtT1zdp7dc');

$intent = \Stripe\PaymentIntent::retrieve('pi_4rLuzUSUnb7FVx3JUxs3');
$intent->capture();
// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
\Stripe\Stripe::setApiKey('sk_test_4eC39HqLyjWDarjtT1zdp7dc');

$intent = \Stripe\PaymentIntent::retrieve('pi_4rLuzUSUnb7FVx3JUxs3');
$intent->capture();

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
Stripe.apiKey = "sk_test_4eC39HqLyjWDarjtT1zdp7dc";

PaymentIntent intent = PaymentIntent.retrieve("pi_4rLuzUSUnb7FVx3JUxs3");
intent.capture();
// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
Stripe.apiKey = "sk_test_4eC39HqLyjWDarjtT1zdp7dc";

PaymentIntent intent = PaymentIntent.retrieve("pi_4rLuzUSUnb7FVx3JUxs3");
intent.capture();

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
const stripe = require('stripe')('sk_test_4eC39HqLyjWDarjtT1zdp7dc');

await stripe.paymentIntents.capture('pi_4rLuzUSUnb7FVx3JUxs3');
// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
const stripe = require('stripe')('sk_test_4eC39HqLyjWDarjtT1zdp7dc');

await stripe.paymentIntents.capture('pi_4rLuzUSUnb7FVx3JUxs3');

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
stripe.Key = "sk_test_4eC39HqLyjWDarjtT1zdp7dc"

intent, err := paymentintent.Capture("pi_4rLuzUSUnb7FVx3JUxs3")
// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
stripe.Key = "sk_test_4eC39HqLyjWDarjtT1zdp7dc"

intent, err := paymentintent.Capture("pi_4rLuzUSUnb7FVx3JUxs3")

// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
StripeConfiguration.ApiKey = "sk_test_4eC39HqLyjWDarjtT1zdp7dc";

var service = new PaymentIntentService();
var intent = service.Capture("pi_4rLuzUSUnb7FVx3JUxs3", null);
// Set your secret key. Remember to switch to your live secret key in production!
// See your keys here: https://dashboard.stripe.com/account/apikeys
StripeConfiguration.ApiKey = "sk_test_4eC39HqLyjWDarjtT1zdp7dc";

var service = new PaymentIntentService();
var intent = service.Capture("pi_4rLuzUSUnb7FVx3JUxs3", null);

A successful capture call will result in a PaymentIntent with a status of succeeded.

Reconciling payments

To monitor the payments activity of your business, you may want to reconcile PaymentIntents with your internal orders system on your server at the end of a day’s activity.

A PaymentIntent that retains a requires_capture status may represent two things:

Unnecessary authorization on your customer’s card statement

Cause: User abandons your app’s checkout flow in the middle of a transaction
Solution: If the uncaptured PaymentIntent is not associated with a completed order on your server, you can cancel it. A canceled PaymentIntent can no longer be used to perform charges.

Incomplete collection of funds from a customer

Cause: Failure of the request from your app notifying your backend to capture the PaymentIntent
Solution: If the uncaptured PaymentIntent is associated with a completed order on your server, and no other payment has been taken for the order (e.g., a cash payment), you can capture it.

Next steps

Congratulations! Your Terminal integration is now set up to collect in-person payments. Next, configure the customer-facing checkout experience in your app, or test your current integration with a physical reader.