How to Integrate EIP-7002: Smart Contract-Controlled Staking Withdrawals

Table of Contents

1. Why Staking Needed an Upgrade?
2. The Smart Contract Era of ETH Withdrawals
3. How to Integrate EIP-7002 Step by Step

• Step 1: Project Bootstrap (Foundry)
• Step 2: Core Contracts (WithdrawalManager + Mocks)
• Step 3: Foundry Tests (Simulating Beacon Withdrawals)
• Step 4: Deployment Script
• Step 5: Integrations (Lido, EigenLayer, Gnosis Safe)

1. Real-World Use Cases of EIP-7002
2. Best Practices for EIP-7002 Contracts

• Security Considerations
• Gas & Timing Considerations
• TL;DR

1. About Us
2. FAQ

Why Staking Needed an Upgrade?

Ethereum’s staking withdrawals before Pectra were restrictive:

• Validators could only set their withdrawal credential to an Externally Owned Account (EOA).
• Funds would flow to a plain wallet address, with no automation, routing, or programmability.
• If a staker wanted to restake ETH, delegate to a pool, or direct funds into DeFi, it required manual intervention.

This rigidity slowed down restaking adoption, added operational friction, and limited innovation in validator services.

EIP-7002, introduced in the Pectra upgrade, solves this by allowing validator withdrawals to target smart contract addresses. This makes withdrawals programmable, enabling automated restaking, revenue distribution, and DAO-level staking flows.

The Smart Contract Era of ETH Withdrawals

EIP-7002 allows a validator to move withdrawal credentials from an EOA to a smart contract.

When withdrawals (either partial or full) occur, ETH is sent directly into that contract, which can then execute custom logic:

• Automated Restaking → Instantly redeposit ETH into EigenLayer or similar protocols.
• Pooling & Revenue Sharing → Distribute ETH to multiple stakeholders (e.g., a validator DAO).
• Treasury Management → Route ETH into lending, liquidity, or hedging strategies.
• Access Controls → Protect funds via multisig, timelocks, or upgradeable modules.

This transforms validator rewards from static flows into programmable assets.

How to Integrate EIP-7002 Step by Step

Step 1: Project Bootstrap (Foundry)

01forge init eip7002-withdrawal02cd eip7002-withdrawal

Update foundry.toml to lock compiler version:

01[default]02solc_version = "0.8.20"

Create project folders:

01mkdir -p src src/mocks script test

Step 2: Core Contracts (WithdrawalManager + Mocks)

WithdrawalManager.sol

01// SPDX-License-Identifier: MIT02pragma solidity ^0.8.20;03 04interface ILido {05    function submit(address referral) external payable returns (uint256);06}07 08interface IRestake {09    function restakeFor(address beneficiary) external payable returns (bool);10}11 12contract WithdrawalManager {13    address public owner;14    address public treasury;15    ILido public lido;16    IRestake public restake;17    bool private _locked;18    uint256 public pendingBalance;19 20    event Received(address indexed sender, uint256 amount);21    event Forwarded(address indexed to, uint256 amount);22    event Restaked(uint256 amount);23    event DepositedToLido(uint256 amount, uint256 shares);24    event PendingQueued(uint256 amount);25    event ProcessedPending(address indexed by, uint256 amount);26 27    modifier onlyOwner() {28        require(msg.sender == owner, "owner only");29        _;30    }31 32    modifier noReentrant() {33        require(!_locked, "reentrant");34        _locked = true;35        _;36        _locked = false;37    }38 39    constructor(address _treasury, address _lido, address _restake) {40        owner = msg.sender;41        treasury = _treasury;42        lido = ILido(_lido);43        restake = IRestake(_restake);44    }45 46    receive() external payable {47        emit Received(msg.sender, msg.value);48        _immediateStrategy(msg.value);49    }50 51    function _immediateStrategy(uint256 amount) internal noReentrant {52        if (amount == 0) return;53        uint256 half = amount / 2;54 55        (bool okTreasury, ) = treasury.call{value: half}("");56        if (okTreasury) emit Forwarded(treasury, half);57        else { pendingBalance += half; emit PendingQueued(half); }58 59        try restake.restakeFor{value: amount - half}(owner) returns (bool success) {60            if (success) emit Restaked(amount - half);61            else { pendingBalance += (amount - half); emit PendingQueued(amount - half); }62        } catch {63            pendingBalance += (amount - half);64            emit PendingQueued(amount - half);65        }66    }67 68    function processPending(uint256 amount) external onlyOwner noReentrant {69        require(amount > 0 && amount <= pendingBalance && amount <= address(this).balance, "invalid amount");70        pendingBalance -= amount;71 72        uint256 half = amount / 2;73        (bool okTreasury, ) = treasury.call{value: half}("");74        if (okTreasury) emit Forwarded(treasury, half);75        else pendingBalance += half;76 77        try restake.restakeFor{value: amount - half}(owner) returns (bool success) {78            if (success) emit Restaked(amount - half);79            else pendingBalance += (amount - half);80        } catch {81            pendingBalance += (amount - half);82        }83 84        emit ProcessedPending(msg.sender, amount);85    }86 87    function setTreasury(address t) external onlyOwner { treasury = t; }88    function setLido(address l) external onlyOwner { lido = ILido(l); }89    function setRestake(address r) external onlyOwner { restake = IRestake(r); }90    function transferOwnership(address newOwner) external onlyOwner { owner = newOwner; }91 92    function emergencyWithdraw(address payable to) external onlyOwner noReentrant {93        uint256 bal = address(this).balance;94        require(bal > 0, "no balance");95        (bool ok, ) = to.call{value: bal}("");96        require(ok, "withdraw failed");97    }98}

Mocks

src/mocks/MockRestake.sol

01pragma solidity ^0.8.20;02 03contract MockRestake {04    event RestakedFor(address indexed beneficiary, uint256 amount);05    receive() external payable {}06    function restakeFor(address beneficiary) external payable returns (bool) {07        emit RestakedFor(beneficiary, msg.value);08        return true;09    }10}

src/mocks/MockTreasury.sol

01pragma solidity ^0.8.20;02 03contract MockTreasury {04    receive() external payable {}05}

Step 3: Foundry Tests (Simulating Beacon Withdrawals)

test/WithdrawalManager.t.sol

01// SPDX-License-Identifier: MIT02pragma solidity ^0.8.20;03 04import "forge-std/Test.sol";05import "../src/WithdrawalManager.sol";06import "../src/mocks/MockRestake.sol";07import "../src/mocks/MockTreasury.sol";08 09contract WithdrawalManagerTest is Test {10    WithdrawalManager manager;11    MockRestake restake;12    MockTreasury treasury;13 14    function setUp() public {15        restake = new MockRestake();16        treasury = new MockTreasury();17        manager = new WithdrawalManager(address(treasury), address(0), address(restake));18    }19 20    function testImmediateForwardAndRestake() public {21        uint256 sendAmt = 1 ether;22        uint256 beforeTreasury = address(treasury).balance;23        uint256 beforeRestake = address(restake).balance;24 25        (bool ok,) = address(manager).call{value: sendAmt}("");26        require(ok);27 28        assertEq(address(treasury).balance, beforeTreasury + (sendAmt / 2));29        assertEq(address(restake).balance, beforeRestake + (sendAmt / 2));30    }31}

Run tests:

01forge test -vv

Step 4: Deployment Script

script/Deploy.s.sol

01pragma solidity ^0.8.20;02import "forge-std/Script.sol";03import "../src/WithdrawalManager.sol";04 05contract Deploy is Script {06    function run() external {07        address treasury = vm.envAddress("TREASURY");08        address lido = vm.envAddress("LIDO");09        address restake = vm.envAddress("RESTAKE");10 11        vm.startBroadcast(vm.envUint("PRIVATE_KEY"));12        new WithdrawalManager(treasury, lido, restake);13        vm.stopBroadcast();14    }15}

Deploy:

01export RPC_URL="https://rpc.testnet.example"02export PRIVATE_KEY="0x..."03export TREASURY="0xYourTreasury"04export LIDO="0xLidoAddress"05export RESTAKE="0xRestakeAddress"06 07forge script script/Deploy.s.sol:Deploy --rpc-url $RPC_URL --broadcast

Step 5: Integrations (Lido, EigenLayer, Gnosis Safe)

• Lido: Use lido.submit{value: ...}(address(this)) to mint stETH.
• EigenLayer: Replace IRestake with EigenLayer’s restaking API (restakeFor, delegateTo, etc.).
• Gnosis Safe: Forward ETH directly with safe.call{value: amount}("") to route funds into multisig-controlled treasuries.

[!WARNING] Disclaimer: The following code examples are for illustrative purposes only and have not been audited. Do not deploy them directly in production.

Real-World Use Cases of EIP-7002

EIP-7002 turns passive rewards into programmable flows. Key patterns:

• Auto-Restake Loops – Rewards auto-route into EigenLayer / LST minting for compounding yield.
• Validator-as-a-Service Splits – Contracts trustlessly split flow between operator, delegators, treasury.
• DAO Treasury Streaming – ETH lands directly in governed treasuries: restake, diversify, or fund ops.
• DeFi Pipelines – Immediate conversion to stETH / rETH, LP provisioning, or lending collateral.
• Safety Buffers – Slice a % to insurance / slashing reserves creating self-healing economics.

Bottom line: EIP-7002 = autonomous validator economies tightly integrated with restaking + DeFi.

Best Practices for EIP-7002 Contracts

Security Considerations

• Keep logic minimal in withdrawal contracts.
• Use try/catch for all external integrations.

Gas & Timing Considerations

• Withdrawals are protocol-driven you don’t pay gas directly.
• But failed executions can cause ETH to get stuck → always have a pending queue + manual processing fallback.

TL;DR

1. Set validator withdrawal credentials to your WithdrawalManager.
2. Contract receives ETH automatically from consensus layer.
3. Forward funds into DAO treasuries, Lido, EigenLayer, or multisigs.
4. Keep contracts minimal + audited.
5. Use fallback safety (queue pattern) to avoid loss.

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