Proof of Stake
In which Stake holder is involved.
Basically in which Stake holder is the main powerholder who decides whether node is telling truth or not.
In which Stake holder checks that the transaction is valid or not.
If it is validate one then stake holder perform this transaction.
But if it is invalid then Stake holder have full power to make it possible by using his power of stake basically this could be a malicious attack by stake holder.
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