Email with direct payment instructions

If you want to communicate to your customers directly with offers, you can include a direct link to the payment page in every email – with descriptions, payment amount, etc. already pre-filled.

This means that you can generate payment links without Adyen's intervention, even when sending out thousands of emails to your customers.  For example, if you have an offer for a cooking set as depicted below. You send out a mail to your customers and they get the following message in their mailbox: 

By clicking the Pay Now! button, the shopper is immediately sent to the (one-page) payment screen, where all order details are already filled in. Shopper only needs to enter their payment details.

When to use

• Marketing actions to your existing customer base
• If you have seen shoppers abandon the ordering processing

When constructing the email your system builds a link to our payment page just as would happen in your webshop. The example below shows what such links look like:

https://test.adyen.com/hpp/pay.shtml?paymentAmount=8650&currencyCode=EUR&shipBeforeDate=2009-09-23&merchantReference=TMRef1234&skinCode=aF563qQs&merchantAccount=YOUR_MERCHANT_ACCOUNT&sessionValidity=2009-09-17T11%3A38%3A55Z&merchantSig=62unnLF...ubZc%3D-&shopperLocale=en_GB&orderData=H4sIAAAAA.....OQBQDxrK1skQEAAA%3D%3D

The following sample demonstrates generating a payment URL for a HPP payment form.

<?php
/**
* These account details can be found in CA TEST environment: https://ca-test.adyen.com/ca/ca/login.shtml
*  $skinCode:        the skin to be used
*  $merchantAccount: the merchant account we want to process this payment with.
*  $hmacKey:         the shared HMAC key.
*/

    $skinCode        = "yzrqpR13"; // your skinCode
    $merchantAccount = "YOUR_MERCHANT_ACCOUNT"; // your merchantAccount
    $hmacKey         = "BDF9B2857654743441D2EE15FB3EEEF2159227FE0D114C2CD31772D2785977DC"; // your HMAC Key

/**
* Setting the default timezone for the sessionValidity.
*/

    date_default_timezone_set('Europe/Amsterdam');

/**
* Payment-specific details. Note that many more fields can be added to the paymentRequest object.
* Please see the API Reference in the Adyen documentation for more information.
*/

    $paymentDetailsParams = array(
      "merchantReference" => "Generated_payment_link", // your merchant reference
      "merchantAccount"   =>  $merchantAccount,
      "currencyCode"      => "EUR",
      "shopperReference"  => "YOUR_UNIQUE_SHOPPER_ID_IOfW3k9G2PvXFu2j", // Customer ID
      "paymentAmount"     => "1234", // paymentAmount is in minor units (e.g. 1000 = 10.00)
      "sessionValidity"   => date('Y-m-d\TH:i:s', strtotime("+ 2 days")), //Allows the session to be active for 2 days
      "skinCode"          => $skinCode
      );

/**
* The following functions generate a payment URL based on the paymentRequest object.
*/

    // The character escape function
    $escapeval = function($val) {
     return str_replace(':','\\:',str_replace('\\','\\\\',$val));
    };

    // Sort the array by key using SORT_STRING order
    ksort($paymentDetailsParams, SORT_STRING);

    // Generate the signing data string
    $paymentDetailsSignData = implode(":", array_map($escapeval,
                                                                array_merge( array_keys($paymentDetailsParams),
                                                                             array_values($paymentDetailsParams)
                                                                           )
                                                    )
                                      );
    // base64-encode the binary result of the HMAC computation
    $merchantSig = base64_encode(hash_hmac('sha256',$paymentDetailsSignData,pack("H*" , $hmacKey),true));
        $paymentDetailsParams["merchantSig"] = $merchantSig;

    // Generate URL
    $paymentUrl = "https://test.adyen.com/hpp/pay.shtml?";
    $parameterCount = 0;
    foreach($paymentDetailsParams as $key => $value)
    {
      if($parameterCount == 0)
        {
          $paymentUrl .= $key."=".urlencode($value);
          $parameterCount++;
        }
        else{
          $paymentUrl .= "&".$key."=".urlencode($value);
        }
    }
    echo htmlentities($paymentUrl);
?>