EIP-7702 Tooling for L2 Dapp Developers: Base and Arbitrum Setup

Hey devs, if you're building dapps on Layer 2s like Base or Arbitrum, EIP-7702 is your new best friend for smoother user experiences without forcing wallet swaps. Since the Pectra upgrade hit in May 2025, this upgrade lets EOAs temporarily borrow smart contract powers in one transaction. Think batching ops, gas sponsorship, and better security, all while keeping that familiar address. No more clunky workarounds; it's native account abstraction lite.

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(Viktoria Lee*)⚔️ ✓ @ViktoriaLee10 · Dec 16, 2025

@0xViki_eth @SentientAGI @arbitrum I decided to write about networks in general. I started from the polygon and am moving on. I wonder what Sentient thinks about each of them.

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I've been knee-deep in EIP-7702 L2 dapp migration scripts lately, and the momentum on Arbitrum and Base is real. Arbitrum rolled out native support through ArbOS 40, turning regular EOAs into hybrid beasts that delegate execution on the fly. Base followed suit, making it dead simple for Coinbase's L2 to handle programmable transactions. This means your users get one-click actions and sponsored flows without losing control. Brutal UX win.

Arbitrum's EIP-7702 Edge for Dapp Builders

Arbitrum One and Nova now let EOAs opt into smart logic delegation seamlessly. No address changes, no migration headaches. Dune Analytics shows smart account adoption spiking, and for good reason: it slashes friction for multi-step interactions. As a swing trader who's timed wallet migration plays, I see this as a momentum setup for dapps chasing volume on high-throughput L2s.

Key EIP-7702 Benefits on Arbitrum

• 

  Native Batching: Bundle multiple transactions into one via temporary smart contract delegation, reducing costs and confirmations on Arbitrum One.
• 

  Gas Abstraction: Enable sponsored transactions where dApps or relayers cover gas fees, making interactions feel free for users.
• 

  One-Click UX: Simplify flows for seamless, frictionless actions like swaps or approvals without extra signatures.
• 

  EOA Preservation: Keep your existing wallet address—no migration needed, just temporary code attachment.
• 

  Security via Temporary Delegation: Delegate execution reversibly per transaction, maintaining full user control and avoiding permanent changes.

Tooling here is solid. Viem's got signAuthorization() and sendTransaction() with authorizationList baked in. Foundry lets you simulate these txs locally before mainnet chaos. QuickNode RPCs handle the heavy lifting. Pair this with thirdweb docs for in-app wallets, and you're testing EIP-7702 Smart EOAs on Arbitrum Mainnet today.

import { createWalletClient, http } from 'viem'
import { base } from 'viem/chains'
import { privateKeyToAccount } from 'viem/accounts'

// ⚠️ NEVER use a real private key here! For demo only - generate a test one
const privateKey = '0x1234567890123456789012345678901234567890123456789012345678901234' as `0x${string}`

const account = privateKeyToAccount(privateKey)

const walletClient = createWalletClient({
  account,
  chain: base,
  transport: http('https://mainnet.base.org')
})

// Replace with your smart contract delegate address (e.g., counterfactual or batcher)
const delegateAddress = '0x000000000000000000000000000000000000dead' as const

// Sign the EIP-7702 authorization
// Note: account configuration supports deploymentType: 'EIP7702' in advanced setups
const authorization = await walletClient.signAuthorization({
  address: delegateAddress
})

// Send transaction using the authorization list
// This temporarily sets the EOA's code to the delegate for this tx
const hash = await walletClient.sendTransaction({
  to: '0x742d35Cc6634C0532925a3b8D7a76C8A0f8d7a0a', // example recipient (replace)
  value: 0n, // no value for safety
  data: '0x', // optional calldata
  authorizationList: [authorization]
})

console.log('Transaction hash:', hash)

// ⚠️ Security: Audit for EOA aliasing quirks (Trail of Bits alert)