ERC-8010 Demo — Pre-delegated Signature Verification

Interactive demo showcasing ERC-8010: verifying signatures for EIP-7702 delegated accounts, before the delegation transaction is even mined.

What is ERC-8010?

ERC-8010 defines a standardized signature wrapper format and off-chain verification procedure for pre-delegation signatures. It solves the problem: "How do I verify a signature signed by an EOA, meant to be validated by a contract the EOA hasn't delegated to yet?"

The key insight: wrap the inner signature with the EIP-7702 authorization tuple and a 32-byte MAGIC marker. Verifiers detect the MAGIC, simulate delegation via eth_call, and validate the signature atomically — all before any on-chain transaction.

• Spec: ERC-8010
• Depends on: EIP-7702, ERC-1271, ERC-6492
• Status: Draft

Project Structure

erc8010/
├── contracts/              # Foundry project (Solidity)
│   ├── src/                # Smart contracts
│   ├── test/               # Unit + integration tests
│   └── script/             # Deploy scripts
├── app/                    # Next.js 16 App Router
│   ├── page.tsx            # Landing page
│   ├── demo/page.tsx       # 5-step interactive demo
│   └── explain/page.tsx    # Technical deep-dive
├── components/             # shadcn/ui components
├── lib/                    # Utilities (wagmi config, ERC-8010 utils)
└── doc/PLAN.md             # Detailed implementation plan

Tech Stack

Layer	Technology
Smart Contracts	Solidity 0.8.28 + Foundry (Prague EVM)
Chain Interaction	viem, wagmi v3
Frontend	Next.js 16, React 19, Tailwind CSS v4
UI Components	shadcn/ui (Base UI)

Getting Started

Prerequisites

• Node.js 20+
• Foundry

1. Install dependencies

npm install

2. Run smart contract tests

cd contracts
forge test -vvv

3. Start local Anvil (Prague hardfork)

anvil --hardfork prague

4. Deploy contracts (local)

cd contracts
PRIVATE_KEY=<anvil_private_key> forge script script/Deploy.s.sol --broadcast --rpc-url http://127.0.0.1:8545

5. Start the frontend

npm run dev

Open http://localhost:3000.

6. Run the demo

1. Connect your wallet
2. Navigate to /demo
3. Follow the 5-step flow:

• Step 1: Sign a message with your EOA
• Step 2: Sign an EIP-7702 authorization and build the ERC-8010 wrapper
• Step 3: Verify the wrapped signature off-chain (viem simulates delegation)
• Step 4: Execute the delegation transaction on-chain
• Step 5: Verify the same signature again (now via direct ERC-1271)

ERC-8010 Signature Format

wrapped = inner_signature || context || context_length || MAGIC

MAGIC = 0x8010801080108010801080108010801080108010801080108010801080108010

License

MIT

Built with viem, wagmi, Next.js, and Foundry.