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

To get the functions exemplified in this section to work, you need to add the code to your WordPress project. You can add it as its own plugin, through the Code Snippets plugin, your theme’s functions.php file or something similar of your choice.

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