Smart accounts (ERC-4337)

Use the ERC-4337 wallet module when your app needs EVM smart accounts, UserOperations, or sponsored and token-paid transaction flows.

Features

• BIP-39 Seed Phrase Support: Generate and validate BIP-39 mnemonic seed phrases
• EVM Derivation Paths: Support for BIP-44 standard derivation paths for Ethereum (m/44'/60')
• Multi-Account Management: Create and manage multiple account abstraction wallets from a single seed phrase
• ERC-4337 Support: Full implementation of ERC-4337 account abstraction standard
• UserOperation Management: Create and send UserOperations through bundlers
• Message Signing: Sign and verify messages using EVM cryptography
• ERC20 Support: Query native token and ERC20 token balances using smart contract interactions
• TypeScript Support: Full TypeScript definitions included
• Memory Safety: Secure private key management with memory-safe HDNodeWallet implementation
• Bundler Integration: Support for ERC-4337 bundler services
• Gas Optimization: Paymaster support and gas estimation for UserOperations
• Fee Estimation: Dynamic fee calculation with bundler-aware estimation
• EIP-712 Typed Data Support: Sign and verify EIP-712 structured typed data
• Batch Token Balance Queries: Query multiple ERC20 token balances in a single call

Supported Networks

This package works with any EVM-compatible blockchain, including:

• Ethereum Mainnet
• Ethereum Testnets (Sepolia)
• Other EVM Chains (Polygon, Arbitrum, Avalanche C-chain, Plasma etc.)

Next Steps

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