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Casper the Friendly Finality Gadget (FFG)
Friendly Finality Gadget (FFG), hybrid PoW/PoS. FFG is a Proof of Stake algorithm implementing stake slashing for bad behavior like chain halts and censorship. Foreseen for Ethereum 2.0

Algorithm

    validators stake a portion of their Ethers as stake.
    validators start validating the blocks. when they discover a block which they think can be added to the chain, they will validate it by placing a bet on it.
    If the block gets appended, he validators will get a reward proportionate to their bets.
    Malicious validator acts trying to do a “nothing at stake”, the will immediately be punished, and all of their stake is going to get slashed.

Pros

    all Pros of Proof of stake
    punish validator trying to do a “nothing at stake” attack,
    punishing miners who go offline, unintentionally or not,

Used in

Resources

Last modified 2yr ago