format-utils/dist/verhoeff.js

Utilities for validating various formats of Indian system codes like Mobile, PAN, AADHAAR, GST and more!

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Verhoeff = void 0;
class Verhoeff {
    static validate(value) {
        const digits = [...value.replace(/\s/g, '')].reverse().map((digit) => parseInt(digit, 10));
        const checksum = digits.reduce((prev, current, index) => {
            return Verhoeff.multiplication[prev][Verhoeff.permutation[index % 8][current]];
        }, 0);
        return checksum === 0;
    }
}
exports.Verhoeff = Verhoeff;
Verhoeff.multiplication = [
    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
    [1, 2, 3, 4, 0, 6, 7, 8, 9, 5],
    [2, 3, 4, 0, 1, 7, 8, 9, 5, 6],
    [3, 4, 0, 1, 2, 8, 9, 5, 6, 7],
    [4, 0, 1, 2, 3, 9, 5, 6, 7, 8],
    [5, 9, 8, 7, 6, 0, 4, 3, 2, 1],
    [6, 5, 9, 8, 7, 1, 0, 4, 3, 2],
    [7, 6, 5, 9, 8, 2, 1, 0, 4, 3],
    [8, 7, 6, 5, 9, 3, 2, 1, 0, 4],
    [9, 8, 7, 6, 5, 4, 3, 2, 1, 0],
];
Verhoeff.permutation = [
    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
    [1, 5, 7, 6, 2, 8, 3, 0, 9, 4],
    [5, 8, 0, 3, 7, 9, 6, 1, 4, 2],
    [8, 9, 1, 6, 0, 4, 3, 5, 2, 7],
    [9, 4, 5, 3, 1, 2, 6, 8, 7, 0],
    [4, 2, 8, 6, 5, 7, 3, 9, 0, 1],
    [2, 7, 9, 3, 8, 0, 6, 4, 1, 5],
    [7, 0, 4, 6, 9, 1, 3, 2, 5, 8],
];
Verhoeff.inverse = [0, 4, 3, 2, 1, 5, 6, 7, 8, 9];