Wordpress Plugin for extending myCRED as a Time Bank

/*
*  Plugin Name: myCRED Time Bank Helper
*  Description: Modifications to the myCRED plugin by Gabriel Merovingi to optimize myCRED for use as a Time Bank. This code was written by Gabriel Merovingi and his documented version will probably be more upto date: http://mycred.me/support/tutorials/add-transfer-messages/
*
*/



    /**
     * Step 1 : Insert Message Field
     * @since 0.1
     * @version 1.0
     */
    add_action( 'mycred_transfer_form_to', 'mycred_pro_transfer_message_field' );
    function mycred_pro_transfer_message_field() {
            echo '<label>Message</label><input type="text" name="transfer-message" id="mycred-transfer-message" value="" placeholder="Optional message to recipient" />';
    }

    /**
     * Step 2 : Replace the Transfer Script
     * @since 0.1
     * @version 1.0
     */
    add_action( 'mycred_front_enqueue', 'mycred_pro_adjust_transfer_script', 99 );
    function mycred_pro_adjust_transfer_script() {
            wp_deregister_script( 'mycred-transfer-ajax' );
            wp_register_script(
                    'mycred-transfer-ajax',
                    get_stylesheet_directory_uri() .  '/js/transfer.js',
                    array( 'jquery', 'jquery-ui-autocomplete' ),
                    myCRED_TRANSFER_VERSION . '.2'
            );
    }

 /**
 * Step 3 : Add Message
 * @since 0.1
 * @version 1.0
 */
add_filter( 'mycred_add', 'mycred_pro_add_message', 98, 3 );
function mycred_pro_add_message( $reply, $request, $mycred ) {
    if ( $reply === false || $request['ref'] != 'transfer' ) return $reply;

    // If message is set
    if ( isset( $_POST['tmessage'] ) ) {

        // Sanitize things so people dont sent "bad" messages
        $message = sanitize_text_field( $_POST['tmessage'] );

        // Replace our custom template tag with the message
        $log_entry = str_replace( '%message%', $message, $request['entry'] );

        // Update the balance now
        $mycred->update_users_balance( $request['user_id'], $request['amount'] );

        // Add to the log
        $mycred->add_to_log(
            'transfer',
            $request['user_id'],
            $request['amount'],
            $log_entry,
            $request['ref_id'],
            $request['data'],
            $request['type']
        );

        // Tell myCRED not to duplicate this transaction
        // This should be 'done' but due to a 1.3 bug we must return false
        // in order to avoid duplicate entries.
        return false;
    }

    return $reply;
}

    /**
     * Step 4 : Notifications
     * @since 0.1
     * @version 1.0
     */
    add_filter( 'mycred_notifications_note', 'mycred_pro_parse_notifications', 10, 3 );
    function mycred_pro_parse_notifications( $template, $request, $mycred ) {

            if ( isset( $_POST['tmessage'] ) ) {

                    $message = sanitize_text_field( $_POST['tmessage'] );
                    if ( ! empty( $message ) ) {

                            $template = str_replace( '%message%', $message, $template );

                    }

            }

            return $template;
    }