Liquid Restaking

What Is Liquid Restaking?

Liquid restaking is a mechanism that takes already-staked cryptocurrency (typically ETH staked on Ethereum) and reuses that economic security to validate additional protocols and services. In return, depositors receive a liquid restaking token (LRT) representing their restaked position. This LRT can be traded, used as collateral in lending protocols, or deployed in liquidity pools: all while the underlying asset continues earning rewards from multiple sources simultaneously.

To understand liquid restaking, it helps to trace the evolution of staking itself. Standard Ethereum staking locks ETH to validate the network and earn roughly 3:4% APY. Liquid staking (via protocols like Lido) tokenizes that position into a liquid staking token (LST) like stETH, so users can deploy their capital elsewhere while still earning staking rewards. Restaking goes one step further: it takes that staked ETH and pledges it as security for additional services beyond Ethereum. Liquid restaking adds the final layer by tokenizing the restaked position itself into an LRT, maintaining liquidity across the entire stack.

EigenLayer pioneered the restaking concept on Ethereum, holding approximately 93.9% of the restaking market with around $18:19 billion in total value locked as of early 2026. The protocol creates a three-sided marketplace connecting restakers who supply capital, operators who run validation infrastructure, and Actively Validated Services (AVSs) that pay for shared security.

How It Works

Liquid restaking operates through a layered architecture where each level builds on the one below it:

The Restaking Stack

1. A user deposits ETH (or an LST like stETH) into a liquid restaking protocol such as ether.fi or Renzo
2. The protocol deposits those assets into EigenLayer's smart contracts, opting into additional slashing conditions
3. The user receives an LRT (such as eETH or ezETH) representing their restaked position
4. Operators registered with EigenLayer run specialized validation software for one or more AVSs, using the delegated stake as their economic backing
5. AVSs pay operators for the security guarantee, and operators share those rewards with restakers through the LRT protocol

The LRT itself is a standard ERC-20 token. Some implementations use a rebasing model (where the token balance increases as rewards accrue), while others use a non-rebasing model (where the token's value relative to ETH increases over time). Most protocols offer both: for example, ether.fi issues rebasing eETH and wrapped non-rebasing weETH for DeFi compatibility.

Actively Validated Services (AVS)

An AVS is any system that uses restaked capital for decentralized validation. These include data availability layers, oracle networks, cross-chain bridges, sequencers, keeper networks, and AI inference verification systems. Each AVS defines its own validation rules and slashing conditions through on-chain smart contracts.

When an operator opts into an AVS, they allocate a specific portion of their delegated stake to that service. EigenLayer's Unique Stake Allocation feature (live since April 2025) ensures that an AVS can only slash the stake specifically designated to it, isolating risk across services. Operators download and run off-chain containers with AVS-specific logic, performing validation tasks in exchange for rewards.

Yield Stacking

The economic appeal of liquid restaking comes from layering multiple yield sources on a single base asset:

Combined yields in 2026 typically range from 8:12% APY, though they can spike higher during periods of elevated AVS demand. The DeFi composability layer is optional: users who deposit LRTs into lending protocols or automated market makers can generate additional returns, but this also amplifies risk exposure.

Major Liquid Restaking Protocols

Several protocols have emerged to simplify the restaking process and issue LRTs:

ether.fi dominates with roughly 65% of the LRT market. The protocol distinguishes itself by allowing stakers to retain control of their validator keys rather than handing them to the protocol, a meaningful security property for users concerned about custodial risk.

Technical Example

A simplified representation of how a liquid restaking deposit flows through smart contracts:

// Simplified LRT deposit flow (pseudocode)

// 1. User deposits ETH into the LRT protocol
lrtProtocol.deposit{ value: 10 ether }();
// Returns: 10 LRT tokens (e.g., eETH)

// 2. LRT protocol delegates to EigenLayer
eigenLayer.depositIntoStrategy(
  stETH,          // underlying asset
  stETHStrategy,  // EigenLayer strategy contract
  amount
);

// 3. Operator allocates stake to AVS
eigenLayer.allocateStake(
  operatorAddress,
  avsContract,     // specific AVS to secure
  allocationAmount // portion of delegated stake
);

// 4. AVS distributes rewards to operator
avs.distributeRewards(operatorAddress, rewardAmount);

// 5. Operator shares rewards with restakers via LRT protocol
lrtProtocol.accrueRewards(rewardAmount);
// LRT token value increases relative to ETH

Use Cases

Bootstrapping Protocol Security

New protocols face a cold-start problem: they need economic security to launch, but lack the capital base to attract validators. Restaking solves this by letting new AVSs borrow Ethereum's existing security. A data availability layer, oracle network, or bridge can launch with billions of dollars in economic backing without building a validator set from scratch.

Capital-Efficient Yield Generation

Before restaking, earning yield from multiple protocols required splitting capital across them. Liquid restaking allows a single ETH deposit to generate returns from Ethereum validation, AVS rewards, and DeFi simultaneously. This capital efficiency is particularly relevant for institutional participants managing large portfolios.

Decentralized Infrastructure Services

AVSs built on restaking infrastructure power a growing range of services:

• EigenDA provides data availability for rollups, reducing costs compared to posting data directly to Ethereum
• AI verification services use restaked capital to ensure model inference results are accurate and tamper-resistant
• Cross-chain messaging protocols use shared security to validate messages across networks without relying on trusted intermediaries

Risks and Considerations

Cascading Slashing

Restaked assets can secure multiple AVSs simultaneously, which means a software bug, malicious operator, or critical failure in one service can trigger slashing that reduces the value of LRTs. This reduction can cascade: if an LRT is used as collateral in a lending protocol, a slashing event could trigger liquidation cascades across DeFi. While EigenLayer's Unique Stake Allocation isolates slashing to specific AVS designations, the interconnected nature of DeFi means secondary effects are difficult to contain.

Smart Contract and Bridge Risk

Liquid restaking stacks multiple layers of smart contracts: the base staking contract, EigenLayer's core contracts, the LRT protocol's contracts, and any cross-chain bridge adapters. Each layer is a potential attack surface. In April 2026, Kelp DAO suffered a $292 million exploit through a vulnerability in its LayerZero cross-chain bridge adapter, not in its core restaking contracts. The attacker exploited a weak verification configuration to inject a fraudulent cross-chain message. This event triggered approximately $5.4 billion in withdrawals across the restaking sector.

LRT Depegging

LRT prices can diverge significantly from the underlying ETH value during market stress. In April 2024, Renzo's ezETH token fell to approximately $688 on Uniswap (from a value near $3,000) following an airdrop-related sell-off, triggering 115 liquidations on the Gearbox protocol. Because LRT redemptions typically require a withdrawal queue of 7:14 days through EigenLayer's escrow process, LRTs cannot be instantly redeemed for the underlying asset. This forces price discovery on secondary markets, where thin liquidity can amplify dislocations.

Regulatory Uncertainty

In August 2025, the SEC issued guidance that certain liquid staking activities do not constitute securities offerings, but explicitly excluded restaking from that scope. Restaking models involving discretionary yield management may still trigger securities classification. The regulatory landscape remains unsettled, particularly for protocols that actively manage AVS selection and reward distribution on behalf of depositors.

Concentration Risk

As of late 2025, ether.fi's eETH represented approximately 65% of total LRTs and over 62% of total restaked value. EigenLayer itself holds roughly 94% of the restaking market. This concentration means a failure in either dominant protocol could have systemic consequences across the entire restaking ecosystem. For comparison, wrapped assets face similar concentration risks when a single bridge or custodian controls a majority of supply.

Bitcoin Security Sharing

The restaking model is not limited to Ethereum. Babylon, the leading Bitcoin restaking protocol, allows BTC holders to stake their bitcoin to secure proof-of-stake chains without wrapping or bridging the asset. By August 2025, approximately 56,000 BTC (worth roughly $6.2 billion) had been restaked through Babylon, with over 250 finality providers participating.

Because Bitcoin lacks native smart contract capabilities for on-chain slashing, Babylon uses a cryptographic approach called Extractable One-Time Signatures (EOTS). If a finality provider signs conflicting blocks, their private key becomes mathematically extractable, enabling trustless penalties. This mirrors the economic security model of EigenLayer while adapting to Bitcoin's constraints.

The convergence of Ethereum restaking and Bitcoin security sharing points toward a broader trend: repurposing existing proof-of-work and proof-of-stake security to bootstrap new protocols. For Bitcoin-native ecosystems like Spark and other Layer 2 solutions, understanding these security sharing models is relevant as the industry explores how to extend Bitcoin's security guarantees to additional services. The BTC-Fi landscape continues to evolve as these primitives mature.

Liquid Restaking vs. Liquid Staking

This glossary entry is for informational purposes only and does not constitute financial or investment advice. Always do your own research before using any protocol or technology.