Payment Authorization & Capture the Payment (Future) using PayPal-node-SDK (PayPal Express Checkout)

Question

I'm working with PayPal Express Checkout and and what i need to do is Authorize and Capture the payment later separately, my current PayPal flow is,

1) I create a payment using following code:

var paypal = require('paypal-rest-sdk');

function createPayPal(req, res, itemsArray, redirectsTos) {
    var payment = {
        "intent": "sale",
        "payer": {},
        "transactions": [{
            "amount": {
                "currency": sails.config.currency,
                "total": itemsArray.totalArrayAmount,
                "details": {
                    "subtotal": itemsArray.totalArrayAmount,
                    "fee": sails.config.PayPalCreateFee
                }
            },
            "invoice_number": req.session.invNum,
            "item_list": {
                "items": itemsArray.itemsArray
            }
        }]
    };
    sails.log.info('payment obj :', JSON.stringify(payment))
    payment.payer.payment_method = sails.config.PayPalPaymentMethod;
    payment.redirect_urls = {
        "return_url": res.locals.return_url_buy,
        "cancel_url": res.locals.cancel_url_buy
    };

    paypal.payment.create(payment, function(error, payment) {
        if (error) {
            sails.log.error(error);
            redirectsTos(({
                message: 'failure',
                redirect: '/paypal/error'
            }), null);
        } else {
        sails.log.info('Payment ID = ', payment.id);
        sails.log.info('User ID = ', req.session.userSession);
        var redirectUrl;
        for (var i = 0; i < payment.links.length; i++) {
            var link = payment.links[i];
            if (link.method === 'REDIRECT') {
                redirectUrl = link.href;
                sails.log.info('goto:', redirectUrl)
                redirectsTos(null, ({
                    message: 'success',
                    redirect: redirectUrl
                }));
            }
        }
        }
    });
}

and Paypal returns me the order information and the redirect urls and i redirected the user to the href in links object. then when the payflow returns to me website it sends me

{
    paymentId: 'PAY-5FB60654T5508144abcxyzZLQ',
    token: 'EC-26U68825EW2123428',
    PayerID: 'QSABTRW6AHYH6'
}

and then i executed the payment using following code.

function executePayPal(req, paymentId, payerId, executedPayPal) {
    sails.log.info('in executedPayPal');
    var details = {
        "payer_id": payerId
    };
    var payment = paypal.payment.execute(paymentId, details, function(error, payment) {
        if (error) {
            sails.log.error('error in payment id in executePayPal function of paypal controller', error);
            var err = JSON.stringify(error);
            var errParsed = JSON.parse(err);
            crashHandlingService.appCrash(errParsed, 101202);
            executedPayPal(({
                message: 'failure',
                redirect: '/paypal/error/'
            }), null);
        } else {
            executedPayPal(({
                message: 'success',
                redirect: '/paypal/success/'
            }), null);
        }
    });
}

Now what this code basically do is

1. Create the payment,
2. Redirect the user to paypal page C
3. Capture the payment.

and what i actually want to achieve is

1. authorize the payment ->

2. capturing the payment so that i can capture the payment some later time in some cronJob or service.

   And redirect the user to paypal page in the middle of above flow, i really don't know how to authorize, redirect and then capture payment.

So please guide me in this regards.

Note: i've read the following paypal documentation but not able to understand. and please keep in mind that i need to show payment detail on paypal page and also the coupon code and its discount on the payment page.

https://developer.paypal.com/docs/integration/direct/capture-payment/#authorize-the-payment https://developer.paypal.com/docs/classic/express-checkout/ht_ec-singleAuthPayment-curl-etc/

Thanks in advance :) .

Answer 1

Finally I've found the solution and i thought i should post it here so that it could be helpful for other.

So there are basically 4 following steps and one have to you use PayPal Node SDK

• Create Payment.
• Redirect User to PayPal.
• Execute Authorized Payment.
• Capture Authorized Payment.

To Create Payment you can use payment.create method of PayPal Node sdk here.

.Create Method will return url links in "href" to redirect user to PayPal page so redirect the user to PayPal page.

After returning from pay PayPal page you have to run .execute method of PayPal Node SDK here, using payer_id and paymentId recived from PayPal.

and finally when you need to capture the amount of the authorized transaction you had to .authorization.capture method of PayPal Node SDK here, by providing amount and the 17 digits authorization id recived in execute authorize response.

Code & Response sample are provided below in case if the links doesn't works in future.

.create Code

var create_payment_json = {
    "intent": "authorize",
    "payer": {
        "payment_method": "paypal"
    },
    "redirect_urls": {
        "return_url": "http://return.url",
        "cancel_url": "http://cancel.url"
    },
    "transactions": [{
        "item_list": {
            "items": [{
                "name": "item",
                "sku": "item",
                "price": "1.00",
                "currency": "USD",
                "quantity": 1
            }]
        },
        "amount": {
            "currency": "USD",
            "total": "1.00"
        },
        "description": "This is the payment description."
    }]
};

paypal.payment.create(create_payment_json, function (error, payment) {
    if (error) {
        console.log(error.response);
        throw error;
    } else {
        for (var index = 0; index < payment.links.length; index++) {
        //Redirect user to this endpoint for redirect url
            if (payment.links[index].rel === 'approval_url') {
                console.log(payment.links[index].href);
            }
        }
        console.log(payment);
    }
});

Response Sample

{
  "id": "PAY-17S8410768582940NKEE66EQ",
  "create_time": "2013-01-31T04:12:02Z",
  "update_time": "2013-01-31T04:12:04Z",
  "state": "approved",
  "intent": "authorize",
  "payer": {
    "payment_method": "credit_card",
    "funding_instruments": [
      {
        "credit_card": {
          "type": "visa",
          "number": "xxxxxxxxxxxx0331",
          "expire_month": "11",
          "expire_year": "2018",
          "first_name": "Betsy",
          "last_name": "Buyer",
          "billing_address": {
            "line1": "111 First Street",
            "city": "Saratoga",
            "state": "CA",
            "postal_code": "95070",
            "country_code": "US"
          }
        }
      }
    ]
  },
  "transactions": [
    {
      "amount": {
        "total": "7.47",
        "currency": "USD",
        "details": {
          "tax": "0.03",
          "shipping": "0.03"
        }
      },
      "description": "This is the payment transaction description.",
      "related_resources": [
        {
          "sale": {
            "id": "4RR959492F879224U",
            "create_time": "2013-01-31T04:12:02Z",
            "update_time": "2013-01-31T04:12:04Z",
            "state": "completed",
            "amount": {
              "total": "7.47",
              "currency": "USD"
            },
            "parent_payment": "PAY-17S8410768582940NKEE66EQ",
            "links": [
              {
                "href": "https://api.sandbox.paypal.com/v1/payments/sale/4RR959492F879224U",
                "rel": "self",
                "method": "GET"
              },
              {
                "href": "https://api.sandbox.paypal.com/v1/payments/sale/4RR959492F879224U/refund",
                "rel": "refund",
                "method": "POST"
              },
              {
                "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-17S8410768582940NKEE66EQ",
                "rel": "parent_payment",
                "method": "GET"
              }
            ]
          }
        }
      ]
    }
  ],
  "links": [
    {
      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-17S8410768582940NKEE66EQ",
      "rel": "self",
      "method": "GET"
    }
  ]
}

.execute Code

var paymentId = 'PAYMENT id created in previous step';

paypal.payment.execute(paymentId, execute_payment_json, function (error, payment) {
    if (error) {
        console.log(error.response);
        throw error;
    } else {
        console.log("Get Payment Response");
        console.log(JSON.stringify(payment));
    }
});

Response Sample

{
  "id": "PAY-34629814WL663112AKEE3AWQ",
  "create_time": "2013-01-30T23:44:26Z",
  "update_time": "2013-01-30T23:44:28Z",
  "state": "approved",
  "intent": "aurthorize",
  "payer": {
    "payment_method": "paypal",
    "payer_info": {
      "email": "[email protected]",
      "first_name": "Betsy",
      "last_name": "Buyer",
      "payer_id": "CR87QHB7JTRSC"
    }
  },
  "transactions": [
    {
      "amount": {
        "total": "7.47",
        "currency": "USD",
        "details": {
          "tax": "0.04",
          "shipping": "0.06"
        }
      },
      "description": "This is the payment transaction description.",
      "related_resources": [
        {
          "sale": {
            "id": "1KE4800207592173L",
            "create_time": "2013-01-30T23:44:26Z",
            "update_time": "2013-01-30T23:44:28Z",
            "state": "completed",
            "amount": {
              "currency": "USD",
              "total": "7.47"
            },
            "transaction_fee": {
              "value": "0.50",
              "currency": "USD"
            },
            "parent_payment": "PAY-34629814WL663112AKEE3AWQ",
            "links": [
              {
                "href": "https://api.sandbox.paypal.com/v1/payments/sale/1KE4800207592173L",
                "rel": "self",
                "method": "GET"
              },
              {
                "href": "https://api.sandbox.paypal.com/v1/payments/sale/1KE4800207592173L/refund",
                "rel": "refund",
                "method": "POST"
              },
              {
                "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-34629814WL663112AKEE3AWQ",
                "rel": "parent_payment",
                "method": "GET"
              }
            ]
          }
        }
      ]
    }
  ],
  "links": [
    {
      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-34629814WL663112AKEE3AWQ",
      "rel": "self",
      "method": "GET"
    }
  ]
}

.authorization.capture Code

var capture_details = {
    "amount": {
        "currency": "USD",
        "total": "4.54"
    },
    "is_final_capture": true
};

paypal.authorization.capture("5RA45624N3531924N", capture_details, function (error, capture) {
    if (error) {
        console.error(error);
    } else {
        console.log(capture);
    }
});

Response Sample

{
  "id": "6BA17599X0950293U",
  "create_time": "2013-05-06T22:32:24Z",
  "update_time": "2013-05-06T22:32:25Z",
  "amount": {
    "total": "4.54",
    "currency": "USD"
  },
  "is_final_capture": true,
  "state": "completed",
  "parent_payment": "PAY-44664305570317015KGEC5DI",
  "links": [
    {
      "href": "https://api.sandbox.paypal.com/v1/payments/capture/6BA17599X0950293U",
      "rel": "self",
      "method": "GET"
    },
    {
      "href": "https://api.sandbox.paypal.com/v1/payments/capture/6BA17599X0950293U/refund",
      "rel": "refund",
      "method": "POST"
    },
    {
      "href": "https://api.sandbox.paypal.com/v1/payments/authorization/5RA45624N3531924N",
      "rel": "authorization",
      "method": "GET"
    },
    {
      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-44664305570317015KGEC5DI",
      "rel": "parent_payment",
      "method": "GET"
    }
  ]
}

You can get more information from REST API Reference And PayPal-node-SDK.

Forgive me if the response sample are somehow a little bit change because i've copied it from PayPal web.

Thanks.