@types/bn.js

What is @types/bn.js?

@types/bn.js provides TypeScript type definitions for the bn.js library, which is a big number library for arbitrary-precision arithmetic. It is commonly used in cryptographic applications and blockchain development.

What are @types/bn.js's main functionalities?

Basic Arithmetic Operations

This feature allows you to perform basic arithmetic operations such as addition, subtraction, multiplication, and division on big numbers.

const BN = require('bn.js');
const a = new BN(123);
const b = new BN(456);
const sum = a.add(b);
console.log(sum.toString()); // '579'

Modular Arithmetic

This feature allows you to perform modular arithmetic operations, which are essential in cryptographic algorithms.

const BN = require('bn.js');
const a = new BN(10);
const b = new BN(3);
const mod = a.mod(b);
console.log(mod.toString()); // '1'

Bitwise Operations

This feature allows you to perform bitwise operations such as AND, OR, XOR, and NOT on big numbers.

const BN = require('bn.js');
const a = new BN('1010', 2); // binary
const b = new BN('1100', 2); // binary
const and = a.and(b);
console.log(and.toString(2)); // '1000'

Number Conversion

This feature allows you to convert numbers between different bases, such as binary, hexadecimal, and decimal.

const BN = require('bn.js');
const a = new BN('ff', 16); // hexadecimal
console.log(a.toString(10)); // '255'

Other packages similar to @types/bn.js

big.js

big.js is a small, fast, and lightweight library for arbitrary-precision decimal arithmetic. It is less feature-rich compared to bn.js but is suitable for applications that require high precision with smaller numbers.

decimal.js

decimal.js is a library for arbitrary-precision decimal arithmetic. It offers a wide range of mathematical functions and is more feature-rich compared to big.js, making it a good alternative to bn.js for applications requiring decimal arithmetic.

bignumber.js

bignumber.js is a library for arbitrary-precision decimal and non-decimal arithmetic. It is similar to bn.js but focuses more on decimal arithmetic, making it suitable for financial calculations.

README

Installation

npm install --save @types/bn.js

Summary

This package contains type definitions for bn.js (https://github.com/indutny/bn.js).

Details

Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/bn.js.

Additional Details

• Last updated: Thu, 05 Jun 2025 20:17:22 GMT
• Dependencies: @types/node

Credits

These definitions were written by Leonid Logvinov, Henry Nguyen, Gaylor Bosson, and JounQin.