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What is Restaking?
Restaking lets you use already-staked crypto (like staked ETH) to secure additional protocols, earning extra yield. EigenLayer pioneered this concept.
Full Explanation
Restaking extends the security of a base layer (like Ethereum) to other protocols. With EigenLayer, you can restake your staked ETH (or liquid staking tokens like stETH) to validate other services (oracles, bridges, rollups) and earn additional rewards. This creates a security marketplace where new protocols don't need to bootstrap their own validator sets. The risk: slashing conditions multiply, and a failure in one restaked service could affect your base stake.