Validator
A computer that verifies transactions and adds new blocks to a proof-of-stake blockchain.
Validators are the backbone of proof-of-stake blockchains like Ethereum, Solana, and Avalanche. They check that transactions are valid (you actually have the USDC you're trying to send), bundle them into blocks, and add those blocks to the chain.
To become a validator, you typically need to "stake" (lock up) the blockchain's native token as collateral. On Ethereum, validators stake 32 ETH. If a validator acts dishonestly, their stake gets "slashed" (partially destroyed) as punishment.
As a USDC user, you don't interact with validators directly. But they're the reason your transactions get processed. The gas fees you pay go to validators as compensation for their work.
Related Terms
Proof of Stake (PoS)
A consensus mechanism where validators stake cryptocurrency as collateral to earn the right to verify transactions.
Blockchain
A distributed, immutable digital ledger that records transactions across a network of computers.
Gas Fees
Transaction fees paid to blockchain validators for processing and confirming transactions.
Staking
Locking up cryptocurrency to help secure a blockchain network, earning rewards in return.
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