ZeroDust

Exit a blockchain completely - transfer 100% of your native gas balance via EIP-7702

ZeroDust is an intent-based exit system that enables users to sweep their entire native gas token balance to exactly zero via EIP-7702 sponsored execution.

The Problem

When users want to fully exit a blockchain, they face an impossible situation:

User has: 0.0008 ETH on Arbitrum
User wants: 0 ETH on Arbitrum (transfer everything to Base)

The Problem:
├── To send ETH, you need ETH for gas
├── If you send all your ETH, you can't pay gas
├── If you keep gas, you can't send all your ETH
└── Result: Small amount always stranded

ZeroDust is the only solution that enables complete chain exits for native gas tokens.

How It Works

1. User connects wallet to ZeroDust
2. User selects source chain and destination (same-chain or cross-chain)
3. User signs ONE authorization (no gas needed)
4. ZeroDust sponsor executes the sweep
5. User receives funds on destination
6. Origin chain balance: EXACTLY ZERO

Supported Sweep Cases

Case	Description	Example
Cross-chain, same address	Exit to yourself on another chain	Arbitrum → Base (same wallet)
Cross-chain, different address	Exit to another wallet on another chain	Arbitrum → Base (different wallet)
Same-chain, different address	Consolidate to another wallet	Arbitrum → Arbitrum (different wallet)

Post-Condition (enforced on-chain): Source balance = exactly 0 wei

Supported Chains

Contract Address (same on all chains): 0x3732398281d0606aCB7EC1D490dFB0591BE4c4f2

ZeroDust is deployed on 26 mainnet chains with EIP-7702 support:

Chain	ID	Token	Chain	ID	Token
Ethereum	1	ETH	Sei	1329	SEI
Optimism	10	ETH	Astar zkEVM	1514	ETH
BSC	56	BNB	Soneium	1868	ETH
Gnosis	100	xDAI	Mantle	5000	MNT
Unichain	130	ETH	Kaia	5330	KAIA
Polygon	137	POL	Base	8453	ETH
Sonic	146	S	Plasma	9745	XPL
X Layer	196	OKB	ApeChain	33139	APE
Fraxtal	252	frxETH	Mode	34443	ETH
World Chain	480	ETH	Arbitrum	42161	ETH
Celo	42220	CELO	Redstone	57073	ETH
BOB	60808	ETH	Berachain	80094	BERA
Scroll	534352	ETH	Zora	7777777	ETH

Plus 46 testnets for development.

See contracts/README.md for explorer links.

Project Structure

zerodust/
├── contracts/          # Smart contracts (Foundry)
│   ├── src/
│   │   ├── ZeroDustSweepMainnet.sol   # Production contract
│   │   └── ZeroDustSweepTEST.sol      # Testnet contract
│   ├── script/
│   │   └── DeployMainnet.s.sol        # Mainnet deployment (CREATE2)
│   └── broadcast/                      # Deployment logs
└── docs/

Architecture

Contract Architecture

┌─────────────────────────────────────────────────────────────┐
│                        User's EOA                            │
│                   (EIP-7702 delegated)                       │
│                                                              │
│  ┌─────────────────────────────────────────────────────┐    │
│  │          ZeroDustSweepMainnet (bytecode)             │    │
│  │                                                      │    │
│  │              executeSweep(intent, sig)               │    │
│  │                        │                             │    │
│  │           ┌────────────┴────────────┐                │    │
│  │           ▼                         ▼                │    │
│  │    MODE_TRANSFER (0)         MODE_CALL (1)           │    │
│  │    Same-chain sweep          Cross-chain sweep       │    │
│  │           │                         │                │    │
│  │           ▼                         ▼                │    │
│  │    Transfer to              Call bridge target       │    │
│  │    destination              (callTarget + callData)  │    │
│  │                                     │                │    │
│  └─────────────────────────────────────┼────────────────┘    │
│                                        │                     │
└────────────────────────────────────────┼─────────────────────┘
                                         │
                                         ▼
                          ┌─────────────────────────┐
                          │     External Bridge     │
                          │       (Gas.zip)         │
                          │                         │
                          │   Delivers funds on     │
                          │   destination chain     │
                          └─────────────────────────┘

Security Model

• No admin functions - Immutable after deployment
• No upgradability - What you see is what you get
• Unified SweepIntent - Single signed structure for all sweep types
• Zero balance enforcement - Contract reverts if any balance remains
• ERC-7201 storage - Prevents slot collisions with other EIP-7702 apps
• Immutable sponsors - Stored in bytecode, not storage

Fee Structure

Service Fee: 1% of swept value, with $0.05 minimum and $0.50 maximum.

Total Fee = Gas Reimbursement + Service Fee + Bridge Fee (if cross-chain)

Examples:
- $5 balance → $0.05 fee (1% = $0.05, at min) → User receives ~$4.95
- $10 balance → $0.10 fee (1%) → User receives ~$9.90
- $60 balance → $0.50 fee (max) → User receives ~$59.50

Documentation

• contracts/README.md - Contract details and deployment
• contracts/SPECIFICATION.md - Technical specification
• contracts/DEPLOYMENT.md - Deployment guide

Security

ZeroDust is designed with security as the top priority:

• No fund custody - All operations are atomic, single-transaction
• User-controlled limits - maxTotalFeeWei and minReceive signed by user
• Mandatory simulation - Every transaction simulated before execution
• routeHash binding - Signature bound to specific bridge route (cross-chain)
• Internal security review - 7 rounds, 16 issues identified and fixed
• External audit - Pending (required before full launch)

Status

Smart Contract: Deployed on 26 mainnets + 46 testnets

Contract Versions

Contract	Status	Features
ZeroDustSweepMainnet	Production	Unified SweepIntent, granular fees, sponsor model
ZeroDustSweepTEST	Testnet	Same as mainnet, for testing

Verified Mainnet Sweeps

Chain	Swept	TX
Base	$3.46 → 0	View
Arbitrum	$3.57 → 0	View
BSC	$2.25 → 0	View
Polygon	$7.55 → 0	View

See contracts/README.md for full deployment list.

Testnets NOT Supporting EIP-7702

The following testnets were tested and do not support EIP-7702:

Abstract, Lens, zkSync, Taiko, opBNB, Avalanche, Swell, Cyber, Boba, Metis, Fuse, Aurora, Flare, Vana, Corn, Rootstock, Apechain, IoTeX, Viction, XDC, Telos, Kava, EDU Chain, Gravity, Manta Pacific, Lightlink, Moonbase, Nibiru, Somnia, Rari, Blast, Xai, B3, Mezo, Chiliz, HashKey, Memecore

Note: Mainnet support may differ from testnet.

Cross-Chain Bridging

ZeroDust supports cross-chain sweeps via the MODE_CALL pattern:

• callTarget: Bridge contract address
• callData: Bridge-specific transaction data
• routeHash: keccak256(callData) - binds signature to specific route

Primary Bridge: Gas.zip - 239+ chains, ~5 second delivery

License

MIT License - see LICENSE

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Production deployed on 26 mainnet chains. Contract: 0x3732398281d0606aCB7EC1D490dFB0591BE4c4f2