As I understand, it’s normally append-only. But, with some implementations, if a malicious entity controls most of the block production, they can undo recent transactions at will.
Some resort to majority vote, in the case of disagreements. Theoretically, if someone owned/controlled over 50% of the database, they could rewrite it, and have their version seen as true.
For the few valid uses of it, that shouldn’t be a problem. It will also be reasonably detectable beforehand.
As I understand, it’s normally append-only. But, with some implementations, if a malicious entity controls most of the block production, they can undo recent transactions at will.
Some resort to majority vote, in the case of disagreements. Theoretically, if someone owned/controlled over 50% of the database, they could rewrite it, and have their version seen as true.
For the few valid uses of it, that shouldn’t be a problem. It will also be reasonably detectable beforehand.