Site Name and URL Shortcode

<?php
add_shortcode( 'site_name', 'scseed_site_name_shortcode' );
function scseed_site_name_shortcode( $atts ) {
    $atts = shortcode_atts(
        array( 'link' => 'no' ),
        $atts,
        'site_name'
    );
    $name = esc_html( get_bloginfo( 'name' ) );
    if ( 'yes' === $atts['link'] ) {
        return '<a href="' . esc_url( home_url( '/' ) ) . '">' . $name . '</a>';
    }
    return $name;
}