README
¶
Package vat
Package for validating VAT numbers & retrieving VAT rates (from ibericode/vat-rates) in Go.
Installation
Use go get.
go get github.com/dannyvankooten/vat
Then import the package into your own code.
import "github.com/dannyvankooten/vat"
Usage
Validating VAT numbers
VAT numbers can be validated by format, existence or both. VAT numbers are looked up using the VIES VAT validation API.
package main
import "github.com/dannyvankooten/vat"
func main() {
// Validate number by format + existence
validity, err := vat.ValidateNumber("NL123456789B01")
// Validate number format
validity, err := vat.ValidateNumberFormat("NL123456789B01")
// Validate number existence
validity, err := vat.ValidateNumberExistence("NL123456789B01")
}
Retrieving VAT rates
This package relies on a community maintained repository of vat rates. We invite you to toggle notifications for that repository and contribute changes to VAT rates in your country once they are announced.
To get VAT rate periods for a country, first get a CountryRates struct using the country's ISO-3166-1-alpha2 code.
You can get the rate that is currently in effect using the GetRate function.
package main
import (
"fmt"
"github.com/dannyvankooten/vat"
)
func main() {
c, err := vat.GetCountryRates("NL")
r, err := c.GetRate("standard")
fmt.Printf("Standard VAT rate for NL is %.2f", r)
// Output: Standard VAT rate for NL is 21.00
}
License
MIT licensed. See the LICENSE file for details.
Documentation
¶
Overview ¶
Package vat helps you deal with European VAT in Go.
It offers VAT number validation using the VIES VAT validation API & VAT rates retrieval using jsonvat.com
Validate a VAT number
validity := vat.ValidateNumber("NL123456789B01")
Get VAT rate that is currently in effect for a given country
c, _ := vat.GetCountryRates("NL")
r, _ := c.GetRate("standard")
Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
var ErrCountryNotFound = errors.New("vat: country not found")
ErrCountryNotFound indicates that this package could not find a country matching the VAT number prefix.
var ErrInvalidCountryCode = errors.New("vat: unknown country code")
ErrInvalidCountryCode will be returned when calling GetCountryRates with an invalid country code
var ErrInvalidRateLevel = errors.New("vat: unknown rate level")
ErrInvalidRateLevel will be returned when getting wrong rate level
var ErrInvalidVATNumber = errors.New("vat: vat number is invalid")
ErrInvalidVATNumber will be returned when an invalid VAT number is passed to a function that validates existence.
ErrServiceUnavailable will be returned when VIES VAT validation API or jsonvat.com is unreachable.
var ServiceTimeout = 10
ServiceTimeout indicates the number of seconds before a service request times out.
Functions ¶
func ValidateNumber ¶
ValidateNumber validates a VAT number by both format and existence. The existence check uses the VIES VAT validation SOAP API and will only run when format validation passes.
Example ¶
vatNumber := "IE6388047V"
valid, _ := ValidateNumber(vatNumber)
fmt.Printf("Is %s valid: %t", vatNumber, valid)
Output: Is IE6388047V valid: true
func ValidateNumberExistence ¶
ValidateNumberExistence validates a VAT number by its existence using the VIES VAT API (using SOAP)
func ValidateNumberFormat ¶
ValidateNumberFormat validates a VAT number by its format.
Types ¶
type CountryRates ¶
type CountryRates struct {
CountryCode string `json:"country_code"`
Periods []RatePeriod
}
CountryRates holds the various differing VAT rate periods for a given country
func FetchRates ¶
func FetchRates() ([]CountryRates, error)
FetchRates fetches the latest VAT rates from ibericode/vat-rates and updates the in-memory rates
func GetCountryRates ¶
func GetCountryRates(countryCode string) (CountryRates, error)
GetCountryRates gets the CountryRates struct for a country by its ISO-3166-1-alpha2 country code.
type RatePeriod ¶
RatePeriod represents a time and the various activate rates at that time.
Source Files