Validator
Last updated 17 October 2026Last verified 17 October 2026
What is a blockchain validator?
A node that proposes and attests to new blocks in a proof-of-stake network. Requires staking capital; misbehavior triggers slashing. In Ethereum, 32 ETH minimum to run a validator; the Pectra upgrade (May 2025) raised the maximum effective balance to 2,048 ETH, enabling validator consolidation. Validator concentration among large staking pools is an ongoing decentralization concern.
TradFi equivalentA clearing member posting margin into a default waterfall. Slashing consumes the defaulter's own contribution the way the waterfall does, except there is no mutualized layer behind it, no committee, and the forfeited amount is destroyed rather than paid to anyone made whole.