What is POS?
WHAT IS PROOF-OF-STAKE (POS)?
Proof-of-stake is a type of consensus mechanism used by blockchain networks to achieve distributed consensus.
It requires users to stake their ETH to become a validator in the network. Validators are responsible for the same thing as miners in proof-of-work: ordering transactions and creating new blocks so that all nodes can agree on the state of the network.
PROOF-OF-STAKE, STAKING, AND VALIDATORS
Proof-of-stake is the underlying mechanism that activates validators upon receipt of enough stake. For Ethereum, users will need to stake 32 ETH to become a validator. Validators are chosen at random to create blocks and are responsible for checking and confirming blocks they don’t create.
HOW DOES ETHEREUM’S PROOF-OF-STAKE WORK?
Unlike proof-of-work, validators don’t need to use significant amounts of computational power because they’re selected at random and aren’t competing. They don’t need to mine blocks; they just need to create blocks when chosen and validate proposed blocks when they’re not. This validation is known as attesting. You can think of attesting as saying “this block looks good to me.” Validators get rewards for proposing new blocks and for attesting to ones they’ve seen.
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