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Authorization and payment capture payment (in the future) using PayPal-node-SDK (PayPal Express Checkout)

I work with PayPal Express Checkout, and what I need to do is authorize and collect the payment later separately, my current PayPal flow is

1) I create a payment using the 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 urls redirection, and I redirected the user to the href object in links . then when payflow returns to my site, it will send me

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

and then I made the payment using the 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 this code basically works

  • Create a payment
  • Redirect user to PayPal C page
  • Capture payment.

and what I really want to achieve

  • allow payment →

  • Payment capture, so that I can fix the payment later, in some cronJob or services.

    And redirect the user to the PayPal page in the middle above the stream, I really don’t know how to allow, redirect and then fix the payment.

So please guide me in this regard.

Note. I read the following PayPal documentation but could not understand it. and keep in mind that I need to show the payment details on the PayPal page, as well as 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:).

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1 answer

Finally, I found a solution, and I thought I should post it here so that it can be useful to others.

So, there are basically 4 next steps, and you need to use the PayPal Node SDK

  • Create payment.
  • Redirect user to PayPal.
  • Make an authorized payment.
  • Authorized Payment Capture.

To create a payment, you can use the payment.create method for PayPal Node sdk here .

The .Create Method will return the URL links to "href" to redirect the user to the PayPal page, to redirect the user to the PayPal page.

After returning from the PayPal page, you should run the .execute method for the PayPal Node SDK here , using payer_id and paymentId received from PayPal.

and finally, when you need to record the amount of the allowed transaction, you should .authorization.capture use the PayPal Node SDK method here , indicating the amount and 17 authorization identifiers received in response to the authorization.

An example code and response is provided below if links in the future do not work.

.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": " bbuyer@example.com ", "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 the REST API Reference and PayPal-node-SDK .

Forgive me if the sample response has changed a bit, because I copied it from the PayPal network.

Thanks.

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