Use PayPal Express

Use the getPayPalExpressCheckoutRedirectURL method to retrieve the RedirectURL by sending an Order object with PAYPAL_EXPRESS payment method.

Workflow

1. Authentication via login API method.
2. Retrieve PayPal redirect URL. When you retrieve the PayPal redirect URL, apart from the token you will also receive 2 parameters that are encoded: billingDetails and deliveryDetails. These have to be base64_decoded and the information should be used in the placeOrder API call (email, billing address etc.).
3. Place the order with PayPal Express using the token sent by PayPal.

Request parameters

Parameter	Type / Description
sessionID	Required (string) Session identifier, the output of the Login method. Include sessionID into all your requests. 2Checkout throws an exception if the values are incorrect. The sessionID expires in 10 minutes.
Order	Required (object) Object designed to collect all data necessary for an order, including billing, product/subscription plan and payment details. Use PAYPAL_EXPRESS as the payment method.

Request sample

Retrieve PayPal redirect URL

<?php

require ('PATH_TO_AUTH');

$Order = new stdClass();
$Order->Language = 'en';
$Order->CustomerReference = 'APITEST'; // set customer reference (optional)
$Order->Currency = 'EUR';

$Order->Items = array();
$Order->Items[0] = new stdClass();
$Order->Items[0]->Code = 'my_subscription_1'; // send the product code
$Order->Items[0]->Quantity = 1;

$Order->PaymentDetails = new stdClass();
$Order->PaymentDetails->Type = 'PAYPAL_EXPRESS'; // payment method, must be PAYPAL_EXPRESS for the express flow to take place.
$Order->PaymentDetails->Currency = 'EUR';
$Order->PaymentDetails->CustomerIP = '91.220.121.21';
$Order->PaymentDetails->FundingSource = 'Credit'; // set the funding source (optional), can be Standard (default, existing payment method) and Credit (the payment method will be PayPal credit)

$PayPalExpress = new stdClass();
$PayPalExpress->Email = '[e-mail]';
$PayPalExpress->ReturnURL = 'http://' . $_SERVER['HTTP_HOST'] . '/api/place_order_api_json_paypal_express_response.php';
$PayPalExpress->CancelURL = 'http://' . $_SERVER['HTTP_HOST'] . '/api/place_order_api_json_paypal_express_response.php?cancel=true';

$Order->PaymentDetails->PaymentMethod = $PayPalExpress;

// Call the method for retrieving Express Checkout redirect URL
$jsonRpcRequest = new stdClass();
$jsonRpcRequest->jsonrpc = '2.0';
$jsonRpcRequest->method = 'getPayPalExpressCheckoutRedirectURL';
$jsonRpcRequest->params = array($sessionID, $Order);
$jsonRpcRequest->id = $i++;
$redirectUrl = callRPC($jsonRpcRequest, $host);
header('Location:' . $redirectUrl);

Place order with PayPal Express

<?php
declare(strict_types=1);

class Configuration
{

    public const MERCHANT_CODE = '';
    public const MERCHANT_KEY = '';
    public const URL = 'http://api.2checkout.com/rpc/6.0';
    public const ACTION = 'placeOrder';
    public const ADDITIONAL_OPTIONS = null;
    //array or JSON
    public const PAYLOAD = <<<JSON
{
  "Country": "us",
  "Currency": "USD",
  "CustomerIP": "91.220.121.21",
  "ExternalReference": "RPC_API_AVANGTE",
  "Language": "en",
  "Source": "testAPI.com",
  "BillingDetails": {
    "Address1": "Test Address",
    "City": "LA",
    "State": "California",
    "CountryCode": "US",
    "Email": "[e-mail]",
    "FirstName": "Customer",
    "LastName": "2Checkout",
    "Zip": "12345"
  },
  "Items": [\
    {\
      "Code": "A90B3D8FDE",\
      "Quantity": 1\
    }\
  ],
  "PaymentDetails": {
    "Currency": "USD",
    "CustomerIP": "91.220.121.21",
    "FundingSource": "Credit",
    "PaymentMethod": {
      "Email": "[e-mail]",
      "Token": "token-gotten-from-getPayPalExpressCheckoutRedirectURL",
      "ReturnURL": "http://secure.avangate.local/test/index.php",
      "CancelURL": "http://secure.avangate.local/test/create_order.php"
    },
    "Type": "PAYPAL_EXPRESS"
  }
}
JSON;
}

class Client
{
    private const LOGIN_METHOD = 'login';
    private $calls = 1;
    private $sessionId;

    private function generateAuth(): array
    {
        $merchantCode = Configuration::MERCHANT_CODE;
        $key = Configuration::MERCHANT_KEY;
        $date = gmdate('Y-m-d H:i:s');
        $string = strlen($merchantCode) . $merchantCode . strlen($date) . $date;
        $hash = hash_hmac('md5', $string, $key);

        return compact('merchantCode', 'date', 'hash');
    }

    public function login(string $url)
    {
        $payload = $this->generateAuth();
        $response = $this->call($url, array_values($payload), self::LOGIN_METHOD);
        $this->sessionId = $response['result'];
    }

    public function call(
        string $url = Configuration::URL,
        $payload = Configuration::PAYLOAD,
        string $action = Configuration::ACTION
    ): ?array {
        if (empty($this->sessionId) && $action !== self::LOGIN_METHOD) {
            $this->login($url);
        }
        if(is_string($payload)) {
            $payload = json_decode($payload, true);
        }
        if (!empty($this->sessionId)) {
            $payload = [$this->sessionId, $payload, Configuration::ADDITIONAL_OPTIONS];
        }
        $payload = array_filter($payload);

        $request = json_encode([\
            'jsonrpc' => '2.0',\
            'method' => $action,\
            'params' => $payload,\
            'id' => $this->calls++,\
        ]);
        $curl = curl_init($url);
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($curl, CURLOPT_SSLVERSION, 0);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Accept: application/json', 'Cookie: XDEBUG_SESSION=PHPSTORM'));
        curl_setopt($curl, CURLOPT_POSTFIELDS, $request);
        $response = curl_exec($curl);
        if(empty($response)) {
            die('Server unavailable');
        }
        echo $response . '</br>';
        return json_decode($response, true);;
    }
}
$client = new Client();
$result = $client->call();
var_dump($result);

Response parameters

Parameter	Type
PayPalExpressCheckoutRedirectURL	String