luhn-generator/update/node_modules/invert-kv/index.js

A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

'use strict';
module.exports = object => {
	if (typeof object !== 'object') {
		throw new TypeError('Expected an object');
	}

	const ret = {};

	for (const key of Object.keys(object)) {
		const value = object[key];
		ret[value] = key;
	}

	return ret;
};