Base-id

A basic base58 and base62 encoding and decoding system. Can optionally add a prefix to make the identifier more identifiable!

Encodes hex-strings, byte arrays, numbers, big integers, and MongoDB ObjectIds to base58 or base62. No dependencies either!

Installation

Install with NPM like so:

npm install base-id

Examples

const { base58, base62 } = require('base-id');

// Generate a new crypto-random id with an arbitrary prefix
base58.generateToken(24, 'account_'); // account_ifq8PeVV9J3weEtz5V14cr9H7AuKhndD

// Generate a new crypto-random id with an arbitrary prefix
base62.generateToken(24, 'product_'); // product_8egyAcmiJhK0pFThcYHYIojG9GIKK7A4



// Encode a hex-string to base58
const hex = "0a372a50deadbeef";
let res = base58.encode(hex); // 2i6ye84HA6z;

// Encode a hex-string to base62
res = base62.encode(hex); // SnmsvJ1ziv;



// Make a MongoDB ObjectId pretty:
const objId = new ObjectId();
res = base58.encodeWithPrefix(objId, 'charge_'); // charge_2d2yysrPLNBLYpWfK

// Change a pretty id back into an ObjectId
new ObjectId(base58.decodeWithPrefix('charge_2d2yysrPLNBLYpWfK', 'charge_')); // new ObjectId("55ea16f30c169b651ddf40ea")

base58 and base62

The module exports both base58 and base62 instances with the following members.

Methods

• encode(mixed) – Encodes the given value to the desired base encoding.
• decode(encodedString) – Decodes the given base-encoded string to a hex string.
• encodeWithPrefix(mixed, prefix) – Encodes the given value to the desired base encoding, prepending a prefix to the result.
• decodeWithPrefix(ecodedString, prefix) – Decodes the given base-encoded string to a hex string, stripping the given prefix.
• generateToken(bytes, prefix) – Generates a secure random string, base encoded, with an optional prefix
• generateBytes(count, options) – Generates secure random bytes
  • options.array – when truthy, will return a Uint8Array instead of a standard array
• bytesToHex(bytes) – Convert a byte array to a hex string
• decodeHexToNumeric(hex) – Decodes a hex string to a BigInt number
• encodeNumericToHex(dec) – Encode a number to hex string
• getHexFromObject(mixed) Gets the hex string from the given thing. Accepts a hex string, number, BigInt, byte array, or MongoDB ObjectId instance.
• getUUIDFromHex(hex, lowercase=true) Gets the formatted UUID string from the given hex string. Defaults to lowercase.

Breaking Changes

v3.0.0

• Removed BigNum dependency (uses JS2020's built-in BigInt)

v2.0.0

• Removed binaryToHex
• Removed hexToBinary