Restaking Explained: EigenLayer, Liquid Restaking Tokens & How to Earn Extra ETH Yield (2025)

Restaking is the hottest DeFi narrative of 2024-2025, with over $15 billion in total value locked across the ecosystem. Created by EigenLayer, restaking lets you take ETH that is already staked (earning ~4% securing Ethereum) and re-use it to simultaneously secure additional protocols — earning extra yield without any additional capital. Think of it as getting a second job that does not require any extra hours. This guide explains how restaking works, compares the top restaking protocols and liquid restaking tokens (LRTs), breaks down the risks, and shows you how to start earning extra yield on your ETH.

What Is Restaking?

To understand restaking, first recall how Ethereum staking works: validators lock up 32 ETH (or any amount via liquid staking protocols like Lido) to secure the Ethereum network. In return, they earn approximately 3-4% APY in staking rewards. This ETH provides economic security — validators risk their stake being "slashed" (partially confiscated) if they act maliciously.

Now, imagine a new protocol — say, a cross-chain bridge or oracle network — that also needs economic security to prevent attacks. Traditionally, it would need to attract its own set of validators and its own staked capital, which is expensive and slow. Restaking solves this by letting already-staked ETH serve as security for both Ethereum AND these additional protocols simultaneously.

The key innovation: the same ETH that secures Ethereum can also secure bridges, oracles, data availability layers, and more — each of which pays additional rewards to the restaker. This creates a win-win: new protocols get instant security, and ETH stakers earn higher yields.

How EigenLayer Works

EigenLayer is the pioneering restaking protocol, founded by Sreeram Kannan at the University of Washington. Here is how the system works:

1. Stakers deposit ETH: Users deposit staked ETH (or LSTs like stETH, rETH) into EigenLayer smart contracts, opting in to the restaking system
2. Operators register: Professional node operators register with EigenLayer and choose which Actively Validated Services (AVS) they want to validate
3. Delegation: Stakers delegate their restaked ETH to operators they trust, similar to choosing a validator in regular staking
4. AVS validation: Operators run validation software for each AVS they support, using the delegated restaked ETH as economic collateral
5. Rewards distribution: AVS protocols pay rewards (in their native tokens and/or ETH) to operators and stakers for providing security
6. Slashing enforcement: If an operator behaves maliciously or negligently for any AVS, the restaked ETH backing that operator can be slashed

What Are Actively Validated Services (AVS)?

An AVS (Actively Validated Service) is any protocol that requires decentralized validation to function. Instead of building its own security from scratch, an AVS "rents" security from Ethereum stakers through EigenLayer. Examples of live and upcoming AVS include:

Liquid Restaking Tokens (LRTs) Compared

Just as liquid staking (Lido's stETH) made staked ETH usable in DeFi, liquid restaking tokens (LRTs) make restaked ETH liquid and composable. When you deposit ETH into a liquid restaking protocol, you receive an LRT token that represents your position. You can use this LRT in DeFi (lending, borrowing, LP) while your underlying ETH earns staking + restaking rewards.

Restaking Yield Breakdown

Here is how the yield stacks when you restake ETH through a liquid restaking protocol:

EigenLayer vs Symbiotic: The Restaking Competition

While EigenLayer pioneered restaking, Symbiotic (backed by Paradigm and cyber.fund) launched as a competitor with a key difference: Symbiotic supports restaking of any ERC-20 token, not just ETH. This enables restaking with stablecoins, governance tokens, and other assets.

How to Start Restaking ETH

Here is a step-by-step guide to start earning restaking yield with your ETH:

1. Choose a liquid restaking protocol: ether.fi (largest, most liquid), Renzo (multi-chain), or Puffer (anti-slashing). Each offers slightly different risk profiles and yield strategies.
2. Deposit ETH: Connect your wallet (MetaMask, Rabby) to the chosen protocol and deposit ETH. You will receive an LRT token (eETH, ezETH, pufETH) representing your position.
3. Hold or use in DeFi: Simply holding the LRT earns you staking + restaking rewards automatically. For advanced users, you can also use LRTs in DeFi: supply to Aave as collateral, provide liquidity in Curve/Pendle, or use in leveraged yield strategies.
4. Monitor and manage: Track your restaking rewards, monitor AVS health, and stay updated on any slashing events that could affect your position.

Restaking Risks in Detail

Restaking introduces novel risks beyond regular ETH staking that every user should understand:

• Slashing cascade: If an AVS you are securing experiences a failure or attack, your restaked ETH can be partially slashed. Because restaked ETH secures multiple AVS simultaneously, a slashing event on one AVS could reduce your total position value.
• Smart contract risk: Restaking involves multiple layers of smart contracts — Ethereum staking, EigenLayer core contracts, LRT protocol contracts, and AVS contracts. Each layer adds potential vulnerability. A bug in any layer could affect your funds.
• LRT depeg risk: Liquid restaking tokens should trade near the value of ETH, but during market stress or a confidence crisis, they can trade at a significant discount (depeg). This happened temporarily with some LRTs during market volatility in 2024.
• Systemic risk: If a large percentage of Ethereum staked ETH is also restaked through EigenLayer, a major slashing event or smart contract exploit could have cascading effects across the entire Ethereum ecosystem.
• Operator risk: When you delegate to an operator, you trust them to correctly validate AVS. A poorly run or malicious operator can get your ETH slashed.
• Yield sustainability: Current restaking yields include temporary protocol incentives (EIGEN tokens, points programs). When these incentives decrease, actual yields from AVS fees may be lower than current rates.

Key Takeaways

• Restaking lets staked ETH simultaneously secure additional protocols (AVS) for extra yield of 1-5%+ on top of base staking
• EigenLayer pioneered restaking with $15B+ TVL and 15+ live AVS including EigenDA
• Liquid restaking tokens (eETH, ezETH, pufETH) make restaked ETH liquid and usable in DeFi
• ether.fi is the largest LRT protocol ($5B+ TVL), followed by Renzo and Puffer Finance
• Symbiotic is EigenLayer's main competitor, supporting multi-asset restaking beyond ETH
• Total restaking yield potential: 4-10%+ APY (ETH staking + AVS rewards + incentives)
• Key risks: slashing, smart contract bugs, LRT depeg, systemic concentration, operator failure
• Only restake through audited protocols with diversified operator sets to minimize risk

Frequently Asked Questions

What is restaking in crypto?

Restaking lets you re-use ETH that is already staked (earning ~4% APY securing Ethereum) to simultaneously secure additional protocols called Actively Validated Services (AVS). You earn extra yield from each AVS on top of your base staking rewards. EigenLayer pioneered this concept, creating a marketplace where new protocols can rent Ethereum security instead of building their own validator sets from scratch.

What is EigenLayer?

EigenLayer is the pioneering Ethereum restaking protocol with $15B+ in total value locked. It allows staked ETH to provide security for other protocols (bridges, oracles, DA layers, sequencers). Stakers delegate ETH to operators who validate AVS and earn rewards. The EIGEN governance token was launched in 2024. Over 15 AVS are live including EigenDA (data availability), AltLayer (rollup verification), and Omni Network (cross-chain messaging).

What are liquid restaking tokens?

Liquid restaking tokens (LRTs) are receipt tokens you receive when depositing ETH into a liquid restaking protocol. They represent your restaked position and can be used in DeFi while your ETH earns staking + restaking rewards simultaneously. Top LRTs: eETH/weETH from ether.fi ($5B+ TVL, largest), ezETH from Renzo ($2B+), pufETH from Puffer ($1B+). LRTs are the capital-efficient way to participate in restaking.

How much can you earn from restaking?

Restaking yield stacks in layers: ETH staking (~3-4% APY) + AVS rewards (~1-5% APY) + protocol incentives (variable EIGEN, ETHFI, etc.). Total potential yield is 4-10%+ APY on ETH. However, actual AVS fee yields are still maturing — current high yields include temporary protocol incentive tokens. Long-term sustainable yields from pure AVS fees are expected to settle in the 5-7% total range.

What are the main risks of restaking?

Restaking risks include: slashing (ETH confiscated if an AVS is attacked), smart contract vulnerability across multiple contract layers, LRT depeg (tokens trading below ETH value during market stress), systemic risk (concentration of restaked ETH amplifying failures), operator risk (delegating to unreliable validators), and yield sustainability concerns (current yields boosted by temporary incentives). Only restake through audited protocols and diversify across operators.