Extra Merchant Data (EMD)

Use the example below to add an attachment (often referred to as Extra Merchant Data, EMD) to the request body when creating or updating a Klarna Payments session.

Extra Merchant Data allows you to send additional structured information to Klarna, such as industry-specific data (for example travel, tickets or other regulated verticals). In some cases, this data is required for certain Klarna products or markets.

Note: The code below is provided as an example only and should not be used in production as-is.
You must adjust the data structure, attachment type, and content to match your specific use case and Klarna’s API requirements.

Important

• The structure of the attachment must follow Klarna’s API specification.
• The content_type must match the type of data you are sending.
• Invalid or incorrectly formatted EMD data will result in API validation errors.

You can find more information about this here: https://docs.klarna.com/api/payments/#operation/createCreditSession

/**
 * Example code for how to add EMD to the KP request args.
 * Please check https://docs.klarna.com/api/payments/#operation/createCreditSession for the exact attachment you need.
 * This is only an example code, you might need to change some of the data or logic based on your own needs.
 */

add_filter( 'wc_klarna_payments_create_session_args', 'kp_add_emd' );
add_filter( 'wc_klarna_payments_update_session_args', 'kp_add_emd' );

/**
 * Adds EMD to the request args sent to Klarna.
 *
 * @param array $request_args The KP Request arguments.
 * @return array
 */
function kp_add_emd( $request_args ) {
	$body = json_decode( $request_args['body'], true );

	$emd_data = array(
		'product_category' => 'Fashion',
		'product_name'     => 'Women Sweatshirt',
	);

	$emd_data = array( $emd_data );

	$emd = array(
		'content_type' => 'application/vnd.klarna.internal.emd-v2+json',
		'body'         => wp_json_encode(
			array( 'marketplace_seller_info' => $emd_data )
		),
	);

	$body['attachment']   = $emd;
	$request_args['body'] = wp_json_encode( $body );
	return $request_args;
}

Adding the code

There are several ways to add code to your site, a couple of examples are:

• Code snippets
• Modify the theme’s functions.php file or include it in a separate functionality plugin.

Please note that we at Krokedil do not offer support for third party plugins.