What Is Transaction Finality in PoS?
Transaction finality is the guarantee that a transaction cannot be reversed once it has been included in the blockchain. In PoS, finality is often achieved through a two-step voting process by a supermajority of validators, after which the transaction is considered irreversible without a catastrophic and extremely costly attack (e.g. losing all staked capital).
Glossar
Transaction Finality
Principle ⎊ Transaction finality is the principle that once a transaction is recorded on a blockchain, it cannot be reversed, altered, or canceled, providing absolute and irreversible settlement assurance.
Supermajority Vote
Threshold ⎊ A Supermajority Vote refers to a governance requirement where a significant fraction, often greater than a simple majority, of token holders or staked value must affirmatively agree to a proposal before it can be enacted on the blockchain.