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bitcoin core growth – Why are AssumeValid blocks manually added?


In case your suggestion is to robotically deal with any block that has N blocks on high of it as assume-valid, that will be a really basic change within the belief mannequin.

Proper now, blocks do not grow to be assume-valid until they’re truly legitimate. It is assessed by the contributors, reviewers, and maintainers of the Bitcoin Core software program (assuming that is the assume-valid you are speaking about), however you are already trusting that group collectively to offer you software program that appropriately implements the Bitcoin protocol any time you replace. It is also auditable (and audited) by anybody who needs, by working the software program with assumevalid disabled and verifying historical past.

If as a substitute your native node would robotically deal with any block with a adequate variety of blocks on high (with out truly validating it) as assume-valid, it will indicate {that a} cabal of dishonest miners might make you settle for invalid blocks. Word that whereas an trustworthy majority of miners is a part of Bitcoin’s assumptions, that is solely the case for consensus, not validity. There is no such thing as a manner in the present day that even 99% of miners in the present day might make your full node settle for a block that incorporates a transaction which steals your cash with out legitimate signature. In a world the place sufficiently-buried blocks are thought-about assume-valid this does grow to be theoretically attainable.

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