Ethereum Compromised Wallet & EIP-7702 Sweeper Rescue Handbook (2026 Reference)

When an Ethereum private key or seed phrase leaks, automated sweeper bots monitor the address and drain any incoming ETH within milliseconds—long before you can broadcast a standard transfer or revoke transaction. Since the May 2025 Pectra upgrade (EIP-7702, transaction type 0x04), attackers also attach persistent 0xef0100 || delegate_address bytecode directly to externally owned accounts (EOAs), executing malicious receive() hooks inside the funding call itself.

This technical reference compiles the complete atomic Flashbots bundle (eth_sendBundle) rescue architecture, EIP-7702 delegation clearing workflow, and protocol-specific recovery runbooks maintained by MEV DAO.

Architecture & Execution Checklist

[Local Node / Mempool Stream] ---> [Foundry Anvil eth_call Simulation]
                                          |
                                          v
[X-Flashbots-Signature Auth]  ---> [eth_sendBundle -> Block Builders]

Key technical invariants to verify before broadcasting:

1. Simulate state transitions at block.number + 1 using eth_callBundle or a pinned Foundry anvil --fork-url environment before signing live bundles.
2. Compute effective bundle gas price (effectiveGasPrice) across all transactions in the bundle, including 0-gas sponsored victim transactions, and ensure it exceeds the target block's tail gas price.
3. Multi-builder fan-out: Submit time-sensitive bundles simultaneously to relay.flashbots.net, Titan Builder, Beaverbuild, and Rsync Builder so you don't miss slots built by non-Flashbots relays.

Complete Technical Guides & Deep-Dive Runbooks in This Series

Below is the complete index of technical deep-dives, runnable Solidity/TypeScript templates, and step-by-step troubleshooting guides in this cluster:

• How to Rescue Tokens From a Compromised Wallet With a Sweeper Bot (Flashbots Guide) — Deep-dive guide covering rescue tokens compromised wallet: A sweeper bot steals every bit of ETH you send for gas. Here's how Flashbots bundles let you rescue tokens and NFTs from a compromised wallet anyway.
• How to Check and Remove a Malicious EIP-7702 Delegation — Deep-dive guide covering remove eip-7702 delegation: EIP-7702 sweeper on your wallet? How to see the delegation with eth_getCode, clear it to address zero, and rescue funds before the attacker re-delegates.
• How to Revoke Token Approvals and Permit2 Signatures — Deep-dive guide covering revoke token approvals: Unlimited approvals and signed Permit2 permits drain most wallets. How to find and revoke them, use Permit2 lockdown, and when revoking won't help.
• Rescue Tokens From a Compromised Wallet: Sweeper Bot Rescue Service — Deep-dive guide covering rescue tokens from compromised wallet: Your options for a sweeper bot rescue: DIY Flashbots bundles, the Flashbots Whitehat Hotline, rescue tools, and how to spot fake recovery services.
• How to Claim an Airdrop From a Compromised Wallet (Before the Sweeper Does) — Deep-dive guide covering how to claim an airdrop from a compromised wallet before the sweeper does: How to claim an airdrop from a compromised wallet with a Flashbots bundle: fund gas, claim and transfer in one block before the sweeper bot.
• The YouTube MEV Bot Scam: How the "Remix Contract" Drains Your ETH — Deep-dive guide covering youtube mev bot scam: How the YouTube MEV bot scam works: how the fake Remix bot contract hides the attacker address, real on-chain losses, red flags, and recovery steps.
• Wallet Drained? What to Do in the First Hour (Ethereum Checklist) — Deep-dive guide covering wallet drained: Wallet drained? A first-hour Ethereum checklist: stop the bleeding, tell a key leak from an approval drain, move to a new seed, rescue leftovers, report it.
• Crypto Recovery Scams: How to Spot Fake "Wallet Recovery" Services — Deep-dive guide covering crypto recovery scam: Crypto recovery scams took $1.4B in 2025 per the FBI. How fake recovery services find drain victims, the red flags, and what can actually be recovered.
• Unstake From a Compromised Wallet: Rescue Locked Tokens — Deep-dive guide covering unstake from compromised wallet: How to unstake from a compromised wallet on Ethereum: rescue staked ETH, Lido/EigenLayer positions, and vesting tokens before a sweeper bot steals them.
• EIP 7702 Rescue vs Flashbots Bundles: Saving Tokens — Deep-dive guide covering eip 7702 rescue: EIP 7702 rescue vs classic Flashbots bundles on Ethereum: how sweep7702 atomic batching defeats aggressive sweeper bots and rescues compromised wallets.
• Recover NFT From a Hacked Wallet: Sweeper Bot Guide — Deep-dive guide covering recover nft from hacked wallet: How to recover an NFT from a hacked wallet on Ethereum when a sweeper bot is watching: atomic Flashbots ERC-721 and ERC-1155 rescue bundles explained.
• Private Key Leaked on Ethereum? Save What's Left — Deep-dive guide covering private key leaked ethereum: Private key leaked on Ethereum or GitHub? See how secret-scanner sweeper bots drain .env keys in seconds and how to rescue tokens via Flashbots.
• Sweeper Bot on Trust Wallet, Ledger & Rabby: Rescue Steps — Deep-dive guide covering sweeper bot trust wallet: Dealing with a sweeper bot on Trust Wallet, Ledger, or Rabby? How wallet-specific seed derivation works and how to export your key to run a Flashbots rescue.
• Compromised Wallet Checker: Is Your Ethereum Key Leaked? — Deep-dive guide covering compromised wallet checker: Use this 5-step Ethereum compromised wallet checker to tell whether your private key is leaked, you have an EIP-7702 sweeper, or a token approval drained you.
• Rescue ENS & Vesting Contracts From a Compromised Wallet — Deep-dive guide covering rescue ens compromised wallet: How to rescue ENS names (.eth) and token vesting contracts (Sablier, Team Finance, Unicrypt, custom cliffs) from a compromised Ethereum wallet via Flashbots.
• Wallet Drainer Approvals: Permit, SetApprovalForAll & 7702 — Deep-dive guide covering wallet drainer approvals: How wallet drainer approvals steal ERC-20s, NFTs, and ETH via EIP-2612 Permit, Permit2, SetApprovalForAll, and EIP-7702—and how to revoke them.
• Sweeper Bot Rescue Service: Live Token Rescue Case Study — Deep-dive guide covering sweeper bot rescue service: Case study: how our sweeper bot rescue service used a private Flashbots rescue bundle to save $42,800 in tokens from an active Ethereum sweeper.

Open-Source Reference Repositories

• eip-7702-delegation-checker-revoker — CLI to inspect 0xef0100 delegation designators and clear malicious EIP-7702 delegates.
• compromised-wallet-sweeper-rescue — Atomic eth_sendBundle sponsor + asset transfer rescue template.
• flashbots-bundle-simulator-anvil — Reproducible Foundry Anvil harness for bundle debugging.
• solidity-mev-bot-scam-detector — Static analyzer to detect obfuscated YouTube/Remix MEV bot drainer contracts.
• ethereum-sniper-bot-flashbots — Same-block Uniswap V2/V3 bundle execution and pre-trade honeypot simulation reference.
• mev-arbitrage-and-liquidation-reference — Atomic two-pool arbitrage & Aave V3 liquidationCall executor with builder coinbase bribe math.

For production Ethereum sniping, compromised-wallet rescues, or custom MEV engineering, visit MEV DAO or start a 3-day trial.