Transfer Messages in Emails

/**
 * Add Transfer Message to Emails
 * @since 1.0
 * @version 1.0
 */
function mycred_pro_add_transfer_message_to_emails( $body, $email, $addon ) {

    $data    = $email['request']['data'];

    // Default text to show if no message was given
    $message = 'No message';

    // This is where the message should be stored
    if ( is_array( $data ) && ! empty( $data ) && array_key_exists( 'message', $data ) )
        $message = $data['message'];

    // Replace our custom template tag with the actual message
    return str_replace( '%transfer-message%', $message, $body );

}
add_filter( 'mycred_email_message_body', 'mycred_pro_add_transfer_message_to_emails', 10, 3 );