Not able to place the order using paypal in magento 2 rest

Question

I am developing an e-commerce mobiloe application using magento 2 rest apis only.This is the flow for making the REST API calls for order placement.

1.Create a cart

api -->{{url}}/index.php/rest/V1/carts/mine

This api will return a unique cart id

2.Add products to cart

api --> {{url}}/index.php/rest/V1/carts/mine/items

body ->

{
 "cart_item": {
     "quote_id": cartId,
     "sku": skuName,
     "qty": 1
     }
}

3. Estimate Shipping Methods

url --> {{url}}/index.php/rest/V1/carts/mine/estimate-shipping-methods

body ->

{
    "address": {
        "region": "Trivandrum",
        "region_id": 12,
        "region_code": "CA",
        "country_id": "IN",
        "street": [
            "Amstor house",
            "Eramam"
        ],
        "telephone": "5656565454",
        "postcode": "670390",
        "city": "Kazhakuttam",
        "firstname": "Peter",
        "lastname": "K",
        "same_as_billing": 0,
        "save_in_address_book": 0
    }

}

This will return all possible shipping methods based on shipping address.In my case the result is

[
  {
    "carrier_code": "freeshipping",
    "method_code": "freeshipping",
    "carrier_title": "Free Shipping",
    "method_title": "Free",
    "amount": 0,
    "base_amount": 0,
    "available": true,
    "error_message": "",
    "price_excl_tax": 0,
    "price_incl_tax": 0
  }
]

4)Save shipping information

url --> {{url}}/index.php/rest/V1/carts/mine/shipping-information

body data ->

{
    "addressInformation": {
        "shipping_address": {

            "region": "Trivandrum",
            "region_id": 12,
            "region_code": "CA",
            "country_id": "IN",
            "street": [
                "Amstor house",
                "Eramam"
            ],
            "telephone": "5656565454",
            "postcode": "670390",
            "city": "Kazhakuttam",
            "firstname": "Peter",
            "lastname": "K",

        },
        "billing_address": {
            "region": "Trivandrum",
            "region_id": 12,
            "region_code": "CA",
            "country_id": "IN",
            "street": [
                "Amstor house",
                "Eramam"
            ],
            "telephone": "5656565454",
            "postcode": "670390",
            "city": "Kazhakuttam",
            "firstname": "Peter",
            "lastname": "K",
        },
        "shipping_method_code": "freeshipping",
        "shipping_carrier_code": "freeshipping"


    }
}

This will return all possible payment methods. Here i am using paypal_express for payment.

5. Payment using paypal plugin

Here i will pay the amount using paypal cordova plugin.Also configured the IPN [{{url}}/paypal/ipn/]in paypal account

This api will return the following data,

{
   "client": {
       "environment": "sandbox",
       "paypal_sdk_version": "2.14.4",
       "platform": "Android",
       "product_name": "PayPal-Android-SDK"
   },
   "response": {
       "create_time": "2016-11-19T05:25:46Z",
       "id": "PAY-5VS11410F5341972MLAX6ETA",
       "intent": "sale",
       "state": "approved"
   },
   "response_type": "payment"
}

5.Save payment and place order

url --> {{url}}/index.php/rest/V1/carts/mine/payment-information

data ->

{
    "cartId": 3,
    "billingAddress‌​": {
        "region": "Trivandrum",
        "region_id": 12,
        "region_code": "CA",
        "country_id": "IN",
        "street": [
            "Amstor house",
            "Eramam"
        ],
        "telephone": "5656565454",
        "postcode": "670390",
        "city": "Kazhakuttam",
        "firstname": "Peter",
        "lastname": "K"
    },
    "paymentMethod": {
        "method": "paypal_express"

    }
}

But this api will returning

{
  "message": "PayPal gateway has rejected request. Invalid token (#10410: Invalid token)."
}

Is there any api missing in the above flow for capturing payments.Please help me.

Answer 1

Paypal Express payment method doesn't support online capturing. There is no way to get a full order creation flow like on Checkout via Magento API interface. It is impossible to change the order state and process payments. As a workaround try the following:

1. Create a custom payment method
2. Enable for REST API only(Not on website checkout page)
3. While making payment using rest api use this method (after successful payment using you android/ios SDK)
4. After placing the order make send transaction id(PAY-xxxxx) return by paypal sdk payment to save trasaction.(tell your server side tio implement this call).

I am writting a complete atrticle regarding this step by step. I will let you know when it is done.

Answer 2

In case someone still looking the solution.

In the time I'm answering this, You will need to create a Magento 2 module to process the payment ID.

After you receive the response from in example Paypal android SDK.

Below is the JSON format that you can send to Magento endpoint :

• for logged user : PUT /V1/carts/mine/order
• for guest : PUT /V1/guest-carts/:cartId/order

Referrence : http://devdocs.magento.com/swagger

The "paypal_express_payment_payload" is just a custom attribute to hold the paypal payment response previously from android SDK.

{
    "paymentMethod": {
        "method": "paypal_express",
        "additional_data": {
            "paypal_express_payment_payload": "{\"create_time\":\"2017-06-15T23:13:52Z\",\"id\":\"PAY-2LB41725NU654612TLFBRIUQ\",\"intent\":\"sale\",\"state\":\"approved\"}"
        }
    }
}

To process the "paypal_express_payment_payload" data, you can implement a Interceptor in your Magento 2 module :

di.xml

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Paypal\Model\Express">
        <plugin name="mymodule_magento_paypal_model_express_plugin" 
                type="Mycompanyorpersonal\Mymodule\Plugin\Paypal\Model\Express" 
                sortOrder="99999" 
                disabled="false" />
    </type>
</config>

Mycompanyorpersonal\Mymodule\Plugin\Paypal\Model\Express.php

You can find the full PHP codes in my following gist : https://gist.github.com/feelinc/de817030e00adc7ff7001de1807c1835

Answer 3

If you use the below to run a post query replace runPostQuery with your curl request. this will pass a token that already has been successful to magento 2.

 $payment['paymentMethod'] = ['method' =>'paypal_express',
               'additional_data' => array (
                   'paypal_express_checkout_token' => $request->query->get('token'),
                   'paypal_express_checkout_redirect_required' => false,
                   'paypal_express_checkout_payer_id' => $request->query->get('PayerID')
               )];


           $completedPayment = $this->runPostQuery('carts/mine/payment-information', $headers, json_encode($payment));

You will need to create a plugin to add the last transaction id to the payment see the above comment, but the above payload to payment-information will allow you to get past _placeOrder function in Paypal\Model\Express.php

The paypal_express_checkout_token is the token passed back to the browser from paypal same as PayerId this allows to check the payment, which will return successful and not require a redirect, but is not the payment reference just the action token.