JavaScript Wallet SDK: A Comprehensive Guide to Web3 API Integration

Overview

The JavaScript Wallet SDK (js-wallet-sdk) is a TypeScript/JavaScript-based solution for blockchain wallet operations. It provides cryptographic algorithms and essential functionalities for creating private keys, generating addresses, constructing transactions, and signing operations offline. This SDK supports multiple major blockchains, with dedicated modules for each cryptocurrency. Future updates will expand this support further.

Supported Platforms

As a JavaScript SDK, it's compatible with:

Web browsers
Mobile applications
Desktop environments

Installation and Setup

NPM Installation

Install the latest version via npm:

npm install js-wallet-sdk

Package Types:

Core Package: Supports all cryptocurrencies
Single-Coin Modules: For individual blockchain integration (e.g., ETH, BTC)

Local Build

To build locally:

Clone the repository
Run the build script

Core Features

Key Modules:

crypto-lib: Cryptographic algorithms (BIP32, BIP39, ECDSA, Ed25519)
coin-base: Base interface for all cryptocurrencies
coin-*: Blockchain-specific implementations (e.g., coin-ethereum, coin-bitcoin)

Package Details

coin-base

Base module providing universal methods:

Private key generation
Address derivation
Transaction signing

npm install @okx/coin-base

Function	Description
`getRandomPrivateKey`	Generates random private key
`getDerivedPrivateKey`	Derives private key from parameters
`getNewAddress`	Generates address from private key

View complete function list

crypto-lib

Cryptographic library supporting:

BIP32/BIP39 operations
Hash functions
Signature algorithms

npm install @okx/crypto-lib

Blockchain-Specific Modules

Blockchain	Package	Key Features
Ethereum	`coin-ethereum`	EVM chain support
Bitcoin	`coin-bitcoin`	BTC, LTC, Doge support
Solana	`coin-solana`	High-performance chain
Polkadot	`coin-polkadot`	Multi-chain support

👉 Explore all supported blockchains

Supported Cryptocurrencies

Blockchain	Derivatives	Path Format
Bitcoin	BTC, LTC	`m/44'/0'/0'/0`
Ethereum	ETH, Polygon	`m/44'/60'/0'/0`
Cosmos	ATOM, OSMO	`m/44'/118'/0'/0`

Testing

Test cases are available in each package's tests directory on GitHub, demonstrating SDK usage patterns.

FAQs

What browsers support this SDK?

All modern browsers with JavaScript support, including Chrome, Firefox, and Edge.

How do I handle multi-chain addresses?

Each coin module provides specific derivation paths. Refer to the respective package documentation.

Can I use this for hardware wallet integration?

Yes, modules include functions like getHardWareRawTransaction for hardware wallet support.

👉 Learn more about advanced features

Is Node.js supported?

Absolutely. The SDK works in any JavaScript environment including Node.js.

Conclusion

The JavaScript Wallet SDK offers comprehensive tools for Web3 development across multiple blockchains. With its modular design and extensive documentation, developers can easily integrate wallet functionalities into their applications.

For implementation examples and advanced usage, visit the official GitHub repository.