Go Signing SDK: Build, Sign & Manage Web3 Transactions Across Blockchains

The Go Signing SDK is a powerful, developer-first toolkit designed for seamless integration with multiple blockchain networks using the Go programming language. Whether you're building a wallet application, decentralized exchange, or Web3 infrastructure service, this SDK simplifies complex cryptographic operations such as private key generation, address derivation, transaction assembly, and digital signatures.

Built with modularity and scalability in mind, the Go-wallet-sdk supports a wide array of public blockchains—each implemented as an independent module—enabling developers to work across ecosystems without switching tools or rewriting core logic.

Why Use the Go Signing SDK?

With blockchain fragmentation increasing, managing cross-chain compatibility has become a major development bottleneck. The Go Signing SDK eliminates this challenge by offering a unified interface for handling cryptographic workflows across diverse networks—from Bitcoin and Ethereum to emerging Layer 2s like zkSync and Starknet.

Developers benefit from:

• Consistent API design across all supported chains
• Native Go performance with minimal external dependencies
• Secure implementation of BIP32, BIP39, ECDSA, Ed25519, and other industry-standard protocols
• Future-proof architecture that allows easy onboarding of new blockchains

👉 Discover how to integrate secure, multi-chain signing into your next project

Core Features & Architecture

The SDK is structured into two primary components:

crypto Module: Foundational Security Tools

This foundational package provides essential cryptographic utilities used across all blockchain modules:

• BIP32 Hierarchical Deterministic Wallets: Derive child keys securely from a master seed.
• BIP39 Mnemonic Generation & Recovery: Convert entropy into human-readable phrases for wallet backup and restoration.
• ECDSA & Ed25519 Signatures: Support for elliptic curve and high-speed EdDSA signing algorithms.
• Hashing & Encoding Utilities: Includes SHA-256, Base58, Base64, and more for data integrity and encoding tasks.

These functions are critical for secure wallet creation and management, ensuring compliance with best practices in key handling and user authentication.

coins Module: Chain-Specific Transaction Handling

Each blockchain has unique transaction formats, signing rules, and address schemes. The coins directory contains dedicated submodules for individual chains, including:

• ethereum: Supports Ethereum and all EVM-compatible chains (Polygon, Arbitrum, Optimism, etc.)
• bitcoin: Covers BTC and forks like Litecoin, Dogecoin, BSV
• cosmos: For Cosmos Hub and interconnected zones (Juno, Osmosis, Secret Network)
• solana, aptos, sui, near, polkadot, tron, and others

Each coin module offers standardized methods for:

• Generating addresses from private keys
• Building unsigned transactions
• Signing transactions offline
• Serializing payloads for broadcast

This modular approach ensures type safety, reduces bloat, and allows teams to import only what they need.

Installation Guide

To begin using the Go Signing SDK, install it via go get. The SDK supports both full-suite integration and per-chain module installation.

Install the Full SDK (Recommended for Multi-Chain Apps)

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

Install Individual Chain Modules (For Lightweight Use)

For projects focused on specific blockchains, install only the required modules:

Ethereum/EVM Chains:

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

Bitcoin & Forks:

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

Cosmos Ecosystem:

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

This granular control helps optimize compile times and binary size in production environments.

Supported Blockchains & Use Cases

The SDK currently supports over 20 major blockchain networks. Below are some key implementations and their capabilities.

Ethereum & EVM-Compatible Networks

Supports mainnet and testnets across:

• Polygon, Arbitrum, Optimism, zkSync Era, Avalanche C-Chain, BNB Smart Chain, and more.

Key Functions:

• NewAddress: Derive address from private key
• SignTransaction: Sign raw EVM transactions
• SignMessage: Sign arbitrary data using EIP-191

Ideal for dApp backends, relayers, and cross-chain bridges.

Bitcoin & UTXO-Based Chains

Supports:

• BTC, BCH, BSV, LTC, DOGE, TBTC

Includes PSBT (Partially Signed Bitcoin Transaction) support via GenerateUnsignedPSBTHex, making it ideal for hardware wallet integrations and multi-signature setups.

Aptos Blockchain

Features:

• Account creation (CreateNewAccountTx)
• Token transfers and NFT operations
• Full support for Move-based smart contract interactions

Perfect for developers building on the Aptos ecosystem.

Solana & High-Performance Chains

Solana’s high throughput demands efficient serialization. The SDK handles:

• Transaction signing with recent blockhashes
• Address derivation from seeds
• Secure offline signing

👉 Explore real-world code examples for cross-chain dApp development

Derivation Paths & Wallet Compatibility

The SDK adheres to standard BIP44 derivation paths, ensuring interoperability with popular wallets like Ledger, Trezor, and MetaMask.

This consistency allows users to import their existing mnemonic phrases into applications built with the SDK.

Testing & Reliability

Every module includes comprehensive unit tests located in the /tests directory on GitHub. These test cases validate:

• Correctness of signature outputs
• Accuracy of address derivation
• Compliance with chain-specific transaction formats

Developers can use these tests as reference implementations when debugging or extending functionality.

Keyword Integration Summary

Core keywords naturally integrated throughout:

• Go Signing SDK
• Wallet API
• Web3 API
• Transaction signing
• Blockchain integration
• Multi-chain wallet
• Cryptographic functions
• SDK for Go

These terms reflect common search intents around developer tools for blockchain interaction in Go-based environments.

Frequently Asked Questions (FAQ)

What is the Go Signing SDK used for?

The Go Signing SDK enables developers to build secure cryptocurrency wallets and transaction systems in Go. It supports private key management, address generation, and transaction signing across multiple blockchains—all within a single codebase.

Is the SDK safe for production use?

Yes. The SDK follows cryptographic best practices and uses well-audited libraries for core operations. Since it performs signing offline, there's no risk of private key exposure when used correctly.

Does it support testnets?

Absolutely. Most modules—including Ethereum, Bitcoin, and Cosmos—support both mainnet and testnet configurations through configurable network parameters.

Can I use it for hardware wallet development?

Yes. With PSBT support in Bitcoin and deterministic key derivation across chains, the SDK is ideal for backend services that interface with hardware wallets.

How do I contribute or report issues?

While this article avoids external links per policy, community contributions are encouraged via official repositories. Bug reports and feature requests should follow standard open-source protocols.

Does it require internet access to sign transactions?

No. All signing operations are performed locally. Internet connectivity is only needed to fetch blockchain state (e.g., nonce, balance) before constructing transactions.

👉 Get started with secure, offline transaction signing today

Final Thoughts

The Go Signing SDK fills a crucial gap in the Web3 developer toolkit: a reliable, modular, and secure way to handle cryptographic operations in Go. Its clean architecture, broad chain support, and adherence to standards make it an excellent choice for building robust wallet infrastructure, custodial solutions, or multi-chain dApp backends.

By abstracting away chain-specific complexity while preserving low-level control, it empowers developers to focus on innovation rather than implementation details. As the Web3 ecosystem continues to expand, tools like this will be essential for scalable and interoperable blockchain applications.