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.

Answer 1

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

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

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