Configuration

Configuration options and settings for @tetherto/wdk-wallet-evm-erc-4337

Wallet Configuration

The WalletManagerEvmErc4337 requires a complete ERC-4337 configuration object with all required parameters:

import WalletManagerEvmErc4337 from '@tetherto/wdk-wallet-evm-erc-4337'

const config = {
  // Required parameters
  chainId: 1,
  blockchain: 'ethereum',
  provider: 'https://rpc.mevblocker.io/fast',
  safeModulesVersion: '0.3.0', // optional as it defaults to '0.3.0', only '0.2.0' and '0.3.0' are valid
  entryPointAddress: '0x0000000071727De22E5E9d8BAf0edAc6f37da032',
  bundlerUrl: `https://api.pimlico.io/v1/ethereum/rpc?apikey=${PIMLICO_API_KEY}`,
  paymasterUrl: `https://api.pimlico.io/v2/ethereum/rpc?apikey=${PIMLICO_API_KEY}`,
  paymasterAddress: '0x777777777777AeC03fd955926DbF81597e66834C',
  transferMaxFee: 100000000000000,
  paymasterToken: {
    address: '0xdAC17F958D2ee523a2206206994597C13D831ec7'
  }
}

const wallet = new WalletManagerEvmErc4337(seedPhrase, config)

Account Configuration

Both WalletAccountEvmErc4337 and WalletAccountReadOnlyEvmErc4337 use the same configuration structure:

import { WalletAccountEvmErc4337, WalletAccountReadOnlyEvmErc4337 } from '@tetherto/wdk-wallet-evm-erc-4337'

// Full access account
const account = new WalletAccountEvmErc4337(
  seedPhrase,
  "0'/0/0", // BIP-44 derivation path
  config    // Same config as wallet manager
)

// Read-only account (transferMaxFee not needed)
const readOnlyAccount = new WalletAccountReadOnlyEvmErc4337(
  '0x...', // Smart contract wallet address
  {
    chainId: 1,
    provider: 'https://rpc.mevblocker.io/fast',
    bundlerUrl: 'https://api.candide.dev/public/v3/ethereum',
    paymasterUrl: 'https://api.candide.dev/public/v3/ethereum',
    paymasterAddress: '0x8b1f6cb5d062aa2ce8d581942bbb960420d875ba',
    entryPointAddress: '0x0000000071727De22E5E9d8BAf0edAc6f37da032',
    safeModulesVersion: '0.3.0',
    paymasterToken: {
      address: '0xdAC17F958D2ee523a2206206994597C13D831ec7'
    }
    // Note: transferMaxFee omitted for read-only accounts
  }
)

Configuration Options

Chain ID

The chainId option specifies the blockchain network ID. Required for fee estimation and Safe4337Pack initialization.

Type: number Required: Yes

Examples:

// Ethereum Mainnet
const config = { chainId: 1 }

// Polygon Mainnet  
const config = { chainId: 137 }

// Arbitrum One
const config = { chainId: 42161 }

// Avalanche C-Chain
const config = { chainId: 43114 }

Provider

The provider option specifies the RPC endpoint or EIP-1193 provider instance for blockchain interactions. Required for all operations.

Type: string | Eip1193Provider Required: Yes

Examples:

// Using RPC URL
const config = {
  provider: 'https://rpc.mevblocker.io/fast'
}

// Using browser provider (MetaMask)
const config = {
  provider: window.ethereum
}

// Using custom ethers provider
import { JsonRpcProvider } from 'ethers'
const config = {
  provider: new JsonRpcProvider('https://rpc.mevblocker.io/fast')
}

Bundler URL

The bundlerUrl option specifies the URL of the ERC-4337 bundler service that handles UserOperation bundling and submission to the mempool. Required for transaction processing.