Go CNPF #

A Go module to validate CPF and CNPJ numbers (Brazilian people and companies unique identifier for the Federal Revenue).

The pseudo-acronym CNPF is a sort of tong-twister and a common typo when developers discuss the implementation of objects that could hold either a CPF or a CNPJ numbers.

package main

import "tangled.org/cuducos.me/go-cnpf"


func main() {
	// these return true
	cnpf.IsValid("23858488135")
	cnpf.IsValid("238.584.881-35")
	cnpf.IsValid("11222333000181")
	cnpf.IsValid("11.222.333/0001-81")
	cnpj.IsValid("12.ABC.345/01DE-35")
	cnpj.IsValid("12ABC34501DE35")

	// these return false
	cnpf.IsValid("111.111.111-11")
	cnpf.IsValid("11.111.111/1111-11")
	cnpf.IsValid("123.456.769/01")
	cnpf.IsValid("12.345.678 9012-34")
	cnpf.IsValid("ABC.DEF.GHI-JK")
	cnpf.IsValid("AB.CDE.FGH/IJKL-MN")
	cnpf.IsValid("123")

	// these return 11111111111, 11111111111111 and 12ABC34501DE35
	cnpf.Unmask("111.111.111-11")
	cnpf.Unmask("11.111.111/1111-11")
	cnpj.Unmask("12.ABC.345/01DE-35")

	// this return 111.111.111-11, 11.111.111/1111-11 and 12.ABC.345/01DE-35
	cnpf.Mask("11111111111")
	cnpf.Mask("11111111111111")	
	cnpj.Mask("12ABC34501DE35")
}

Based on Go CPF and Go CNPJ ❤️