What Is the Role of a “Validator” in a Proof-of-Stake System?

In a Proof-of-Stake (PoS) system, a validator is a participant who helps secure the network by staking their own cryptocurrency as collateral. Validators are responsible for proposing and validating new blocks of transactions.

Instead of mining, an algorithm selects a validator to create the next block, often based on the size of their stake. If they validate fraudulent transactions, they can lose a portion of their staked coins through a process called slashing.

This financial incentive ensures they act honestly.