Ethereum Restaking and EigenLayer

EigenLayer launched on Ethereum mainnet in 2024 as one of the most structurally novel DeFi protocols in years. The core insight: Ethereum's $50+ billion of staked ETH represents an enormous pool of cryptoeconomic security that is currently only used to secure one application — Ethereum itself. EigenLayer enables this security to be "restaked" — repurposed to secure additional services called Actively Validated Services (AVSs) — creating a marketplace for cryptoeconomic security. Restakers earn additional yield; AVSs get economic security without bootstrapping a new validator set from scratch.

The Cryptoeconomic Security Marketplace

Building a new proof-of-stake protocol from scratch requires attracting validators with a native token, bootstrapping economic security from zero, and hoping the token value rises enough to make attacking the network economically prohibitive. This is the "cold start problem" for new decentralised networks. EigenLayer solves it by allowing new protocols (AVSs) to rent Ethereum's established validator security pool. An AVS — which could be a rollup, a data availability layer, an oracle network, a cross-chain bridge, or any service requiring decentralised validation — specifies slashing conditions, pays restakers a yield for securing it, and inherits a security budget backed by the restaked ETH.

Restakers opt in to specific AVSs, accepting that their staked ETH can be slashed if they violate the AVS's rules (in addition to normal Ethereum slashing conditions). The additional yield compensates for this additional risk. The result is a multi-sided market: restakers earn more yield by securing more services, AVSs get instant access to credible security, and Ethereum's validators gain a new revenue stream beyond consensus rewards.

Native Restaking vs Liquid Staking Restaking

There are two ways to participate in EigenLayer. Native restaking: Ethereum validators (who run validator nodes and have 32 ETH staked) can point their withdrawal credentials to an EigenPod contract, making their staked ETH eligible for restaking. The validator's withdrawal address becomes the EigenPod, enabling EigenLayer to impose slashing conditions. Native restaking earns the highest yield (Ethereum consensus rewards + priority fees + AVS rewards) but requires running a validator node and accepting technical complexity. Liquid restaking token (LRT) restaking: Users who hold liquid staking tokens (stETH from Lido, rETH from Rocket Pool, cbETH from Coinbase) can deposit them directly into EigenLayer without running a validator node. The deposited LSTs are then delegated to operators who run the AVS software on the depositor's behalf. This is accessible to any ETH holder with an LST.

Liquid Restaking Protocols

The complexity of directly managing EigenLayer positions spawned a new category: liquid restaking protocols that abstract the complexity into a single token. EtherFi (eETH/weETH) is the largest liquid restaking protocol, automatically depositing staked ETH into EigenLayer and distributing across AVSs. Users hold weETH (wrapped eETH), earning both Ethereum staking yield and EigenLayer restaking points/yield automatically. Renzo (ezETH) and Puffer Finance (pufETH) offer similar abstractions. These tokens trade on DEXs with thin liquidity relative to their TVL, creating de-peg risk during periods of stress — as demonstrated during the April 2024 episode where ezETH briefly de-pegged 6% as leveraged restakers unwound positions. Liquid restaking tokens combine Ethereum staking risk, EigenLayer slashing risk, and the liquid restaking protocol's own smart contract risk.

EIGEN Token and EigenLayer Economics

The EIGEN token (launched May 2024) is EigenLayer's governance and utility token. EIGEN serves as a "universal objective fault token" — it can be slashed for intersubjective faults (errors or misbehaviours that are not unambiguously provable on-chain but can be assessed by the community). This extends slashable misbehaviour beyond purely algorithmic violations to include social consensus about correctness. EIGEN is staked separately from ETH restaking, creating a layered security model where some AVS conditions are enforced by ETH slashing (objective, on-chain verifiable faults) and others by EIGEN social consensus.

Risks of Restaking

Restaking amplifies risk in several important ways. Slashing risk multiplication: each AVS you secure adds a new set of slashing conditions. Restakers must be confident they can meet AVS operational requirements or delegate to competent operators who can. Operator failure can result in slashing of the entire restaked position across all delegated AVSs simultaneously. Systemic risk: if a major AVS is exploited or exhibits faulty slashing behaviour, it could slash a significant fraction of restaked ETH — creating contagion effects across Ethereum staking. EigenLayer's governance has the ability to veto slashing events, but this introduces governance risk. Smart contract risk: EigenLayer itself adds a smart contract attack surface beyond Ethereum consensus. The potential attack surface of EigenLayer's contracts managing large ETH TVL is significant. Carefully evaluate the additional yield versus these compounded risks before restaking large positions, particularly through liquid restaking protocols that add further smart contract layers.