Go Wallet SDK: Build, Sign & Manage Web3 Transactions with Ease

In the rapidly evolving world of blockchain and decentralized applications, developers need reliable, efficient, and secure tools to interact with multiple chains. The Go Wallet SDK is a powerful, open-source solution designed for Go developers who want to integrate multi-chain wallet functionalities—like key generation, transaction signing, and address management—directly into their applications.

Built with modularity and scalability in mind, this SDK supports a wide range of blockchains across various ecosystems, including Bitcoin, Ethereum, Cosmos, Solana, and more. Whether you're building a Web3 backend service, a wallet application, or a cross-chain dApp, the Go Wallet SDK streamlines development with clean APIs and offline cryptographic operations.

Key Features of the Go Wallet SDK

The SDK offers a comprehensive suite of tools tailored for modern blockchain development:

• Offline Transaction Signing: Securely sign transactions without connecting to the network, minimizing exposure to online threats.
• Multi-Chain Support: Unified interface for interacting with diverse blockchain protocols—from EVM-compatible chains to UTXO-based networks.
• Hierarchical Deterministic (HD) Wallets: Full BIP32 and BIP39 implementation for generating mnemonic phrases and deriving child keys securely.
• Cross-Platform Compatibility: As a native Go library, it integrates seamlessly into web servers, CLI tools, microservices, and embedded systems.
• Modular Architecture: Each blockchain has its own dedicated module, making it easy to include only what your project needs.

👉 Discover how to integrate secure wallet functionality into your next project using the Go Wallet SDK.

Installation and Setup

Getting started is simple. The Go Wallet SDK follows standard Go module practices and can be installed via go get.

To install the core package (recommended for all users):

go get github.com/okx/go-wallet-sdk

Each blockchain is implemented as a separate sub-package under /coins, allowing you to import only the modules relevant to your use case.

For example, to add Ethereum support:

go get github.com/okx/go-wallet-sdk/coins/ethereum

And for Bitcoin:

go get github.com/okx/go-wallet-sdk/coins/bitcoin

This modular design reduces bloat and improves compile-time efficiency.

Core Packages and Functionalities

crypto – Foundational Cryptographic Tools

At the heart of the SDK lies the crypto package, which provides essential cryptographic utilities used across all blockchain modules:

• BIP39 Mnemonic Generation: Create human-readable recovery phrases.
• BIP32 HD Key Derivation: Generate hierarchical deterministic wallets.
• ECDSA & Ed25519 Signing: Support for both secp256k1 (used by Bitcoin/Ethereum) and Ed25519 (used by Solana, SUI) signature schemes.
• Hashing & Encoding: Built-in functions for SHA-256, Keccak-256, Base58, Base64, and other common formats.

These tools ensure that cryptographic operations are consistent, secure, and compliant with industry standards.

Blockchain-Specific Modules

Each supported chain comes with its own module offering chain-specific logic for address generation, transaction construction, and signing.

Ethereum & EVM-Compatible Chains

Supports Ethereum and all major EVM-based networks such as Polygon, Arbitrum, Optimism, zkSync Era, Base, and Avalanche C-Chain.

Key functions:

• NewAddress() – Derive address from private key
• SignTransaction() – Sign raw transactions
• SignMessage() – Sign arbitrary messages (EIP-191/EIP-712)

All use derivation path: m/44'/60'/0'/0/0

Bitcoin & UTXO-Based Networks

Supports BTC, BCH, BSV, LTC, DOGE, and testnet variants like TBTC.

Features:

• PSBT (Partially Signed Bitcoin Transaction) support via GenerateUnsignedPSBTHex
• Legacy, SegWit (P2SH), and Bech32 address formats
• Multi-signature transaction compatibility

Derivation paths vary by format:

• Legacy: m/44'/0'/0'/0/0
• SegWit (P2SH): m/49'/0'/0'/0/0
• Native SegWit (Bech32): m/84'/0'/0'/0/0

👉 Start building cross-chain applications with robust transaction signing today.

Cosmos Ecosystem

Supports ATOM, Juno, Osmosis, Secret Network, Kava, Evmos, and others built on the Cosmos SDK.

Functions:

• Transfer() – Build and sign Cosmos SDK bank transfers
• SignMessage() – Sign Amino-encoded messages

Uses standard Cosmos derivation: m/44'/118'/0'/0/0 (or chain-specific paths like 394' for Cronos)

Solana

High-performance integration for Solana’s Ed25519-based accounts.

Functions:

• NewAddress() – Generate public key from private key
• SignTransaction() – Sign Solana wire-format transactions

Derivation path: m/44'/501'/0'/0/0

Aptos

Supports Aptos’ Move-based ecosystem with BIP44-compliant key derivation.

Functions:

• NewAddress() – Compute account address from public key
• SignRawTransaction() – Sign BCS-encoded transactions

Path: m/44'/637'/0'/0/0

Additional Supported Chains

All modules follow consistent naming patterns and error handling, reducing learning curve across chains.

Use Cases and Integration Scenarios

Backend Wallet Services

Run non-custodial key management securely on your server. Generate wallets offline, sign transactions in memory, and broadcast via public RPCs.

Cross-Chain Bridges

Leverage unified interfaces to validate addresses, estimate fees, and sign payloads across heterogeneous networks.

Institutional Custody Solutions

Integrate with HSMs or KMS providers using the SDK’s clean cryptographic boundaries and deterministic outputs.

Developer Tooling

Build CLI tools or API gateways that abstract away complex blockchain details while maintaining full control over signing logic.

Testing and Reliability

Each module includes a comprehensive test suite located in the /tests directory of its respective GitHub repository. These tests cover edge cases like invalid inputs, malformed transactions, and boundary conditions in key derivation.

You can run them locally using standard Go testing commands:

go test -v ./coins/ethereum/

This ensures high code quality and predictable behavior across environments.

Supported Blockchains Overview

The SDK currently supports over 50+ assets across 15+ blockchain families. Below are some highlights:

Full details available in official documentation.

Frequently Asked Questions (FAQ)

Q: Can I use this SDK in production environments?
A: Yes. The Go Wallet SDK is actively maintained and used in enterprise-grade applications. Always audit your deployment setup and keep dependencies updated.

Q: Does it support hardware wallet integration?
A: While the SDK itself operates in software, it can be combined with hardware signers by exporting public keys and forwarding unsigned payloads to external devices.

Q: Is there support for custom derivation paths?
A: Yes. You can override default BIP44 paths when initializing HD wallets, enabling compatibility with custom wallet standards.

Q: How does it handle gas fee estimation?
A: The SDK focuses on signing; fee estimation should be handled externally using chain-specific APIs before constructing transactions.

Q: Is it compatible with WebAssembly (WASM)?
A: Go compiles to WASM experimentally. While not officially optimized for browser use, server-side deployment is fully supported.

Q: Are there plans to support more chains like Cardano or Algorand?
A: Roadmap updates are shared through community channels. Contributions are welcome via GitHub pull requests.

Final Thoughts

The Go Wallet SDK empowers developers to build secure, scalable, and interoperable Web3 applications using one of the most performant backend languages available. With strong cryptographic foundations, modular design, and extensive multi-chain coverage, it's an ideal choice for teams building infrastructure-level blockchain solutions.

Whether you're creating a custody platform, a cross-chain aggregator, or a high-frequency trading bot, this SDK provides the low-level control you need—with none of the complexity.

👉 Accelerate your Web3 development journey with powerful Go-based tooling.