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Lido

Overview

Lido is the largest and most influential liquid staking protocol on Ethereum. It aims to solve the liquidity insufficiency problem of Ethereum 2.0 Beacon Chain staking. Before the Ethereum Shanghai upgrade, staked ETH could not be withdrawn; even after withdrawals were enabled, directly running a validator node still requires locking 32 ETH and having technical operations capability.

Lido allows users to stake any amount of ETH and receive a 1:1 corresponding stETH token. stETH can circulate freely in DeFi markets, be traded, and used as collateral, thereby unlocking the liquidity of staked assets while allowing users to enjoy staking rewards.

Core Mechanism and Principles

1. stETH (Lido Staked ETH)

  • Rebase Mechanism: stETH is a rebase token. As Ethereum validators earn staking rewards, the total supply of stETH automatically adjusts (increases) daily, and users' wallet balances increase accordingly. This means the price of 1 stETH should theoretically always be pegged to 1 ETH.
  • wstETH (Wrapped stETH): To be compatible with certain DeFi protocols that don't support the rebase mechanism (such as Uniswap, MakerDAO), Lido provides a wrapped version, wstETH. The wstETH balance remains constant, but its exchange rate to stETH increases over time (value-accruing).

2. Node Operators

Lido does not directly run all validator nodes. Instead, as a DAO, it distributes users' ETH to a curated set of professional node operators. - DAO Governance: The Lido DAO votes to determine which operators can join the whitelist. These operators are typically well-known staking service providers (such as P2P.org, Stakefish). - Fee Distribution: 10% of staking rewards are collected by the Lido protocol, half going to node operators and half to the Lido DAO treasury (for insurance, development, etc.), with the remaining 90% distributed to stETH holders.

3. Withdrawals and Buffer

After the Ethereum Shanghai upgrade, Lido supports ETH redemption. The protocol maintains a withdrawal buffer, using newly deposited ETH from users and partial rewards to meet withdrawal demands. If the buffer is insufficient, it initiates validator exit processes.

Key Features

  • Excellent Liquidity: stETH is the most liquid staked asset in DeFi, with deep stETH/ETH pools on Curve and other DEXs, allowing near-lossless exits.
  • DeFi Lego Building Block: stETH is widely accepted as collateral on Aave, as a minting asset on MakerDAO, etc., greatly improving ETH's capital efficiency.
  • Simple and Easy to Use: Users can stake with one click without maintaining hardware.

Controversies and Challenges

  • Centralization Risk: Lido holds an extremely high share of the Ethereum staking market (once exceeding 30%), raising community concerns about network centralization and censorship risks. Lido is attempting to mitigate this through DVT (Distributed Validator Technology) and a modular node operator set (Staking Router).
  • Governance Attacks: If LDO token holdings are too concentrated, the governance layer could exert adverse influence on the protocol.
  • LSD / LST: Liquid Staking Tokens.
  • LDO: Lido's governance token.
  • DVT: Distributed Validator Technology, designed to fragment validator private key control to reduce single points of failure and centralization risk.