Key Takeaways
EigenLayer is a protocol built on Ethereum that introduces "restaking", allowing staked ETH and liquid staking tokens (LSTs) to secure additional services beyond the Ethereum base layer.
Services built on EigenLayer are called Actively Validated Services (AVSs) and can include data availability layers, cross-chain bridges, oracle networks, and more.
Restakers can choose from native ETH restaking, LST restaking, or liquidity provider (LP) token restaking, each with a different risk and reward profile.
Introduction
Building a secure blockchain application typically requires bootstrapping an entirely new set of validators. This process is expensive, slow, and risky for new projects, and it creates fragmented security across the wider ecosystem.
EigenLayer is a protocol built on Ethereum designed to address this challenge. It introduces a mechanism called restaking, which allows users who have already staked ETH to extend that security to other services without needing to unstake or lock up additional assets. In doing so, EigenLayer functions as a marketplace for decentralized trust.
How Does EigenLayer Work?
At its core, EigenLayer allows Ethereum stakers to "opt in" to its smart contracts, enabling their staked ETH (or LSTs) to simultaneously secure additional protocols and services beyond Ethereum's base layer.
EigenLayer also introduces a modular security approach. This allows stakers to contribute their ETH to secure specific functionalities within the network. These functionalities are generally referred to as modules. For example, a module might be dedicated to securing decentralized storage solutions like Arweave. Some modules could secure in-game items within blockchain-based games. Others could foster trust within decentralized applications (DeFi) applications like Aave.
These additional protocols are called Actively Validated Services (AVS). Before walking you through the restaking process, let’s delve deeper into AVS.
What Are Actively Validated Services (AVS)?
AVSs are the services and applications that use EigenLayer's pooled security. They can range from data availability layers and cross-chain bridges to oracle networks and rollup infrastructure. Each AVS system sets its own participation requirements, and restakers can choose which AVS they want to support.
One notable AVS is EigenDA, EigenLayer's own data availability layer. EigenDA is designed to process high volumes of data, making it well-suited for Layer 2 rollups and applications that require efficient and cost-effective data storage.
How Restaking Works Step by Step
A user stakes ETH on Ethereum (either natively or via a liquid staking protocol).
They deposit their staked ETH or LSTs into EigenLayer's smart contracts.
They choose which AVS to support and either run the required software themselves or delegate to an operator.
Operators run AVS-specific software on behalf of restakers and earn rewards in return. This is part of the delegation model that EigenLayer supports, where restakers can delegate their assets to operators, entities that manage the technical infrastructure for one or more AVSs.
Rewards generated by the AVSs are distributed back to restakers and operators based on their participation.
Types of Restaking
EigenLayer supports three main types of restaking, each suited to different users and setups:
Native ETH restaking: Validators running Ethereum nodes can restake their ETH directly by pointing their withdrawal credentials to EigenLayer contracts. This option requires technical knowledge and is more suitable for advanced users.
Liquid Staking Token (LST) restaking: Users holding LSTs from protocols like Lido (stETH) or Rocket Pool (rETH) can deposit those tokens into EigenLayer. This is a common entry point for users who prefer not to run their own validator infrastructure.
Liquidity Provider (LP) token restaking: Liquidity provider tokens that include ETH or LSTs can also be deposited into EigenLayer, extending restaking participation to users active in DeFi liquidity pools.
The EIGEN Token
In 2024, three years after EigenLayer was founded, the EIGEN token was launched. EIGEN serves as a utility and governance token within the EigenLayer ecosystem. It can be used to participate in governance decisions and to secure certain AVSs that require a separate token-based security model, alongside or instead of native ETH restaking.
Benefits of EigenLayer
EigenLayer aims to enhance the security of decentralized applications (DApps) by leveraging a shared pool of validators across different modules. This creates a more robust and trustworthy environment for users.
It also serves as a testing ground where new Ethereum functionalities can be experimented with and validated before being deployed on the mainnet, enabling developers to explore innovations such as danksharding from the Cancun upgrade.
Additionally, EigenLayer promotes permissionless innovation by removing the need for developers to build and maintain their own validator sets. Instead, they can tap into an existing network of secure validators through restaking, which encourages broader experimentation and development within the Ethereum ecosystem.
Risks to Consider
Like any DeFi protocol, EigenLayer involves risks that users should understand before participating.
Slashing risk: Restakers and operators can face slashing (partial loss of staked assets) if they act against the rules of an AVS or fail to maintain required uptime. EigenLayer does not enforce specific guidelines or standard logic for slashing, but each AVS can design custom slashing policies.
Smart contract risk: EigenLayer relies on complex smart contracts. Any vulnerability in those contracts could potentially lead to loss of funds.
Correlated slashing: Operators who secure multiple AVSs simultaneously face correlated risk. A failure in one area could trigger penalties across several services at once.
Centralization concerns: If a large share of restaked assets becomes concentrated with a small number of operators, this emergence of dominant staking pools may introduce centralization risks that could affect the broader protocol's security model.
Added complexity: EigenLayer introduces additional layers of complexity compared to standard Ethereum staking, which can make it harder to assess and manage risk. This is particularly so for less experienced participants.
Closing Thoughts
EigenLayer introduces a new approach to how decentralized security can be shared across the Ethereum ecosystem. Restaking enables users to extend their existing ETH security to additional services, in turn potentially lowering the barriers to launching secure blockchain infrastructure and improving capital efficiency for participants.
Amid the rapidly developing restaking space, EigenLayer remains an active area of interest and discussion within the crypto community. As with any evolving protocol, it's worth staying informed and understanding both the opportunities and the risks involved.
Further Reading
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