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Dictionary Consensus

Validator

A validator is a participant in a proof-of-stake network that checks transactions, proposes new blocks and votes on blocks proposed by others. To take part, a validator usually locks up a required amount of tokens as a stake. In return for honest, reliable work it earns rewards, and it can be penalised for misbehaviour or extended downtime. Validators may be run by individuals, companies, exchanges or staking services on behalf of token holders.

Written by our editors · Updated October 15, 2026

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