JavaScript Signing SDK: A Comprehensive Guide to Web3 Wallet Integration

Overview

The Js-wallet-sdk is a versatile TypeScript/JavaScript-based wallet solution that supports multiple blockchain cryptographic algorithms and essential functionalities. This SDK enables developers to generate private keys, create addresses, assemble transactions, and perform signatures across various blockchain networks.

Supported Platforms

Compatible with all modern browsers and JavaScript environments, this SDK seamlessly integrates into:

Web applications
Mobile apps
Desktop software

Installation and Setup

NPM Installation

Install the latest version via npm:

npm install @okxweb3/js-wallet-sdk

The SDK offers two package types:

Public packages (all currencies)
Single-coin modules (individual blockchain implementations)

Example Integrations

ETH Integration: npm install @okxweb3/coin-ethereum
BTC Integration: npm install @okxweb3/coin-bitcoin

Local Build Instructions

Clone the repository:

git clone https://github.com/okx/js-wallet-sdk.git

Run build script:
```
npm run build
```

Core Features

Module	Description
`crypto-lib`	Implements security algorithms (BIP32, BIP39, ECDSA, Ed25519)
`coin-base`	Provides universal blockchain interfaces
`coin-*`	Coin-specific transaction builders (e.g., `coin-ethereum`, `coin-bitcoin`)

Package Ecosystem

👉 Explore all available packages

Package	Description	Documentation
`@okxweb3/coin-base`	Universal blockchain interfaces	GitHub
`@okxweb3/crypto-lib`	Cryptographic functions	GitHub
`@okxweb3/coin-ethereum`	EVM chain support	GitHub
`@okxweb3/coin-solana`	Solana integration	GitHub

Key Functionality

Universal Methods (`coin-base`)

interface WalletSDK {
  getRandomPrivateKey(): string;
  getDerivedPrivateKey(params: DerivePriKeyParams): string;
  signTransaction(rawTx: RawTransaction): SignedTransaction;
  // ...+15 other methods
}

Blockchain-Specific Features

Ethereum:
- Supports ERC-20/721 tokens
- Hardware wallet integration
Bitcoin:
- SegWit/Native SegWit addresses
- Multi-chain support (LTC, DOGE, etc.)
Cosmos:
- IBC token transfers
- 15+ supported chains (ATOM, OSMO, etc.)

Supported Blockchains

Chain Family	Example Networks	Derivation Path
EVM	ETH, Polygon	`m/44'/60'/0'/0/0`
UTXO	BTC, LTC	`m/44'/0'/0'/0/0`
Cosmos	ATOM, OSMO	`m/44'/118'/0'/0/0`

👉 Full chain support list

FAQ

Q: How do I handle gas estimation?

const fee = await sdk.estimateFee(txParams);

Q: Can I use this with hardware wallets?

Yes! Supports:

Ledger
Trezor
AirGap Vault

Q: What's the difference between `coin-base` and individual packages?

coin-base: Universal interfaces
Individual packages: Chain-specific optimizations

Q: How are mnemonic phrases generated?

import { bip39 } from '@okxweb3/crypto-lib';
const mnemonic = bip39.generateMnemonic();

Best Practices

Security:
- Always store private keys encrypted
- Use hardware wallets for high-value transactions
Performance:
- Batch transaction signing
- Cache frequently used addresses
Maintenance:
- Regularly update SDK versions
- Monitor chain-specific updates

Conclusion

This JavaScript Signing SDK provides a robust toolkit for Web3 wallet development, offering:

✔️ Multi-chain support
✔️ Enterprise-grade security
✔️ Simplified transaction flows
✔️ Continuous ecosystem expansion

For implementation examples and advanced usage, visit our developer portal.