getVerifier()

import { getVerifier } from 'rut.ts'
 
getVerifier('12.345.678-5')  // '5'
getVerifier('9068826K')      // 'K'

function getVerifier(rut: string): VerifierDigit
function getVerifier(rut: string, options: { throwOnError: false }): VerifierDigit | null
function getVerifier(rut: string, options: { throwOnError: true }): VerifierDigit
 
type VerifierDigit = '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' | 'K'

import { getVerifier } from 'rut.ts'
 
getVerifier('12.345.678-5')    // '5'
getVerifier('18.972.631-7')    // '7'
getVerifier('9.068.826-K')     // 'K'
getVerifier('9068826k')        // 'K' (converted to uppercase)

import { getVerifier } from 'rut.ts'
 
const verifier = getVerifier('invalid', { throwOnError: false })
console.log(verifier)  // null

import { getVerifier, calculateVerifier, getBody } from 'rut.ts'
 
const rut = '12.345.678-5'
const body = getBody(rut)
const verifier = getVerifier(rut)
const calculated = calculateVerifier(body)
 
if (verifier === calculated) {
  console.log('Verifier is correct!')
}