Web3.js Integration

A minimal Web3.js-compatible adapter for EVM signing with Emblem remote signing.

📖 Related Documentation

Signers Overview Auth Quick Start React Hooks

Basic Usage

basic-usage.ts

React/Next.js Usage

When using @emblemvault/emblem-auth-react, access the authenticated SDK via the useEmblemAuth() hook:

SignWithWeb3.tsx

Supported Operations

Message Signing

Sign plain text or byte arrays

sign-message.ts

Typed Data Signing (EIP-712)

sign-typed-data.ts

Transaction Signing

Sign transactions (returns rawTransaction hex)

sign-transaction.ts

Complete Example

complete-example.ts

Adapter Interface

The EmblemWeb3Adapter class provides these methods:

address: Hex // readonly

signMessage(message): Promise<Hex>

signTypedData(domain, types, message): Promise<Hex>

signTransaction(tx): Promise<{ rawTransaction: Hex }>

Note on Transaction Broadcasting

The toWeb3Adapter() method returns a minimal signer that focuses on signing operations. It does not include transaction broadcasting functionality. To broadcast transactions, you'll need to use a separate Web3 provider or send the signed raw transaction via your RPC endpoint.

Benefits of Emblem Integration

• No private key exposure - Keys stay secure in Emblem Vault
• Minimal adapter - Lightweight implementation focused on signing
• Multi-chain support - Use across any EVM-compatible chain
• Standard interface - Compatible with Web3.js patterns