bigi

What is bigi?

The 'bigi' npm package is a JavaScript library for handling big integers. It provides functionalities for arithmetic operations, comparisons, and conversions of large integers, which are essential in cryptographic applications and other domains requiring precise large number calculations.

What are bigi's main functionalities?

Big Integer Creation

This feature allows you to create big integer instances from various formats such as hexadecimal strings. The code sample demonstrates creating a big integer from a hexadecimal string.

const bigi = require('bigi');
const bigInt = bigi.fromHex('1a2b3c');

Arithmetic Operations

Bigi supports arithmetic operations like addition, subtraction, multiplication, and division on big integers. The code sample shows how to add two big integers.

const bigi = require('bigi');
const a = bigi.fromHex('1a2b3c');
const b = bigi.fromHex('2b3c4d');
const sum = a.add(b);

Comparison Operations

This feature provides methods to compare big integers, such as checking for equality or determining which is greater. The code sample demonstrates checking if two big integers are equal.

const bigi = require('bigi');
const a = bigi.fromHex('1a2b3c');
const b = bigi.fromHex('2b3c4d');
const isEqual = a.equals(b);

Conversion to String

Bigi allows conversion of big integers to string representations in various formats, such as hexadecimal. The code sample shows converting a big integer back to a hexadecimal string.

const bigi = require('bigi');
const bigInt = bigi.fromHex('1a2b3c');
const hexString = bigInt.toHex();

Other packages similar to bigi

bn.js

The 'bn.js' package is a popular library for arbitrary-precision arithmetic in JavaScript. It offers similar functionalities to 'bigi' but is more widely used and maintained. 'bn.js' provides a comprehensive set of features for big number operations and is often preferred for its performance and extensive documentation.

big-integer

The 'big-integer' package is another library for handling large integers in JavaScript. It provides a user-friendly API for arithmetic operations, comparisons, and conversions. Compared to 'bigi', 'big-integer' is known for its simplicity and ease of use, making it a good choice for developers who need straightforward big integer manipulations.

README

bigi

JavaScript library to manipulate big integers. Based on jsbn made by Tom Wu

Official documentation:

http://cryptocoinjs.com/modules/misc/bigi/