What is a Validator?
A validator is an actor that participates in proposing or validating blocks according to network rules.
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What Does a Validator Do?
A validator is an actor that participates in the block production and verification tasks of a blockchain network. Particularly in Proof of Stake networks, assets specified by the protocol must be deposited as collateral to undertake this role. The validator signs messages according to the rules during assigned tasks and occasionally proposes a new block.
This duty consists of more than just keeping a computer running. The software must be up to date, the connection must be active, and the signing keys must be secure. Running the same validator key on two misconfigured systems can lead to signing conflicting messages and subsequent penalties on some networks.
Is a Node the Same as a Validator?
Every validator uses infrastructure to communicate with the network; however, not every node is a validator. An ordinary full node can verify the validity of blocks but might not undertake the task of proposing blocks or participating in protocol votes. In Bitcoin, the term “miner” is generally used for block producers. Grouping the roles of different networks under the same name can be misleading.
Delegating Tokens to a Validator
Some networks allow users to provide staking support without running a validator themselves. In this process, called delegation, the ownership of the token and the withdrawal process vary according to the network’s design. For instance, a validator announcing a 5 percent commission does not mean they will provide you with a 5 percent annual return; they may be taking a specific portion of the earned reward as a service fee.
When making a choice, looking only at the promised reward is not enough. Slashing history, commission adjustability, lock-up or exit periods, and whether penalties are passed on to users are all important factors. Furthermore, the title of “validator” does not imply that the identity or integrity of the service provider has been independently verified.