What Is EigenLayer?

How does EigenLayer restaking work?

EigenLayer restaking lets Ethereum validators or liquid stakers opt in to secure additional protocols by reusing their staked ETH or liquid staking tokens (LSTs) as collateral. Instead of only securing the Ethereum network, stakers can “restake” to support new services—like data availability layers, oracles, or bridges—and earn extra rewards. EigenLayer acts as a middleware protocol: it tracks which validators have opted in, enforces slashing across multiple services, and coordinates reward distribution. Stakers can participate directly by running their own validator or indirectly by depositing LSTs (such as stETH or rETH) into EigenLayer smart contracts.

• Restaking: Re-using staked ETH or LSTs to secure other protocols beyond Ethereum.
• Opt-in: Validators and LST holders choose which protocols to support and accept extra slashing risks.
• Shared Security: New protocols inherit the economic security of Ethereum’s validator set.

Why does EigenLayer matter for Ethereum and DeFi?

EigenLayer matters because it makes Ethereum’s security more composable and accessible to new protocols, reducing their need to bootstrap their own validator sets. Traditionally, launching a new blockchain or decentralized service required recruiting and incentivizing a large, trustworthy validator set—a major hurdle for most projects. EigenLayer allows protocols to “rent” security from Ethereum’s existing validators, making it easier to launch new infrastructure with robust trust assumptions. For DeFi, this means more secure oracles, bridges, and data layers, potentially reducing attack surfaces and improving composability.

• Security as a Service: Protocols can leverage Ethereum’s staked capital without building their own security layer.
• Bootstrapping: New projects can launch faster and more securely by tapping into EigenLayer’s restaked pool.
• Yield Stacking: Stakers can earn rewards from multiple protocols, increasing capital efficiency.

What are the risks and rewards of EigenLayer restaking?

EigenLayer restaking offers higher yield potential but also exposes stakers to additional slashing risk if the protocols they secure are attacked or misbehave. When you restake, your ETH or LSTs can be slashed not just for Ethereum consensus violations, but also for failures or attacks on any protocol you opt in to secure. The extra yield comes from fees or tokens paid by these protocols to restakers. However, the risk profile is materially different from vanilla ETH staking.

• Additional Slashing: Slashing conditions expand to include failures in restaked protocols, not just Ethereum.
• Protocol Diversity: Each protocol has unique requirements and risks—research is critical before opting in.
• Reward Multiplication: Restakers can earn rewards from multiple sources, but these are not risk-free.

How do protocols use EigenLayer security?

Protocols use EigenLayer by registering as “Actively Validated Services” (AVSs), which rely on restaked capital to secure their operations and enforce honest behavior. AVSs can include decentralized oracles, bridges, data availability layers, and more. By tapping into EigenLayer’s shared pool, these protocols can set their own slashing conditions and design custom cryptoeconomic incentives, all enforced by EigenLayer’s smart contracts. This model enables new infrastructure to launch with robust security and flexible governance, without the need for a native token or independent validator set.

• AVS (Actively Validated Service): Any protocol that integrates with EigenLayer to use restaked security.
• Custom Slashing: AVSs define their own slashing rules, which EigenLayer enforces across participating validators.
• Economic Alignment: AVSs pay restakers for security, aligning incentives and reducing bootstrapping friction.

Real-World Example: Restaking and Slashing

To illustrate, let’s walk through a scenario involving Lido’s stETH and a hypothetical data availability AVS. An LST holder deposits 100 stETH (representing 100 ETH) into EigenLayer and opts in to secure the AVS, which pays 2% annualized in its native token. If the AVS fails and triggers a 20% slashing event, the staker’s stETH balance could drop to 80 stETH. This loss is on top of any risks from Lido or Ethereum itself. The extra 2% yield must outweigh this risk for the strategy to be rational.

How to participate in EigenLayer

You can participate in EigenLayer by restaking as a validator or by depositing liquid staking tokens (LSTs) through EigenLayer’s smart contracts. Direct restaking requires running an Ethereum validator and opting in to EigenLayer’s interface, choosing which AVSs to support. Alternatively, you can deposit LSTs like stETH, rETH, or cbETH, and select AVSs to secure through EigenLayer’s web app. Rewards are distributed according to each AVS’s terms, and slashing risk depends on your opt-in choices. Participation is permissionless, but you must understand each protocol’s slashing conditions and yield structure before committing capital.

• Validator Restaking: Requires running your own node and managing opt-ins for AVSs.
• LST Restaking: Deposit liquid staking tokens for a more passive approach, but still subject to AVS risk.
• Reward Distribution: Each AVS sets its own yield and payout schedule.

Frequently Asked Questions