Custom Address Provider

class My_Custom_Provider extends CoCart_Abstract_Address_Provider {

    public function __construct() {
        $this->id = 'my_provider';
        $this->name = 'My Provider';
        $this->branding_html = '<span>Powered by My Service</span>';
    }

    public function search( $query, $country, $type ) {
        // Implement your search logic
        // Return array of suggestions
        return [
            [
                'id' => 'unique_id',
                'label' => 'Display text',
                'matched_substrings' => [ // Optional
                    [
                        'offset' => 0,
                        'length' => strlen($query)
                    ]
                ]
            ]
        ];
    }

    public function select( $address_id ) {
        // Implement your address retrieval logic
        // Return WooCommerce address format
        return [
            'address_1' => '',
            'address_2' => '',
            'city' => '',
            'state' => '',
            'postcode' => '',
            'country' => '',
        ];
    }

    public function can_search( $country ) {
        // Return true if your provider supports this country
        return true;
    }

    public function get_supported_countries() {
        // Optional: Return array of supported country codes
        // Return empty array for all countries
        return []; // or ['US', 'CA', 'GB']
    }
}

add_filter( 'cocart_address_autocomplete_providers', function( $providers ) {
    $providers[] = new My_Custom_Provider();

return $providers;
} );