Skip to content
Back to Glossary
◈ crypto

Validator

Node responsible for securing a blockchain network

What is Validator?

A participant in a proof-of-stake network who locks up tokens as collateral and runs infrastructure to produce blocks and verify transactions. Validators earn rewards for honest behavior and lose stake (slashing) for misconduct. On Polkadot, validators secure the Relay Chain and, by extension, every parachain connected to it. Running a validator requires technical infrastructure, reliable uptime, and significant DOT stake.

Take the next useful step

Free Web3 Creator Kit

Frameworks and templates for content, governance, and community work.

Web3 consulting

For turning a protocol, community, or adoption question into a working plan.

💡

In plain words

"A trusted notary for the blockchain — they stake their own money as a bond, verify transactions, and get paid for honest work. Cheat, and they lose their deposit."

How it works

Key takeaways

  • Stake their own tokens as collateral

  • Produce and verify blocks

  • Slashed if they act maliciously

▸

Real-world example

A validator on Polkadot runs high-availability servers, stakes 10K+ DOT, and produces blocks. Nominators back them with additional stake. Everyone shares rewards.

Related terms

Staking

Locking tokens to earn rewards and secure networks

Polkadot (DOT)

Multi-chain protocol for blockchain interoperability

Relay Chain

The security and coordination layer of Polkadot

Copied