問題文
A land office lists who owns which parcels on a shared ledger, following the common interface for non-fungible tokens (EIP-721). It wants the list to be partly closed, so that the public at large cannot learn who owns what, and it wants the records never to change hands once they are set. The guidance answers both wishes. What defeats the attempt to keep ownership hidden, and by what is such a register kept from moving its entries?
選択肢
- What defeats the attempt is the tally each holder leaves in plain sight, and such a register is kept from moving its entries by having each transfer call refuse to run.
- What defeats the attempt is outsiders asking each number who holds it now, and such a register is kept from moving its entries by having each transfer call refuse to run.
- What defeats the attempt is outsiders asking each number who holds it now, and such a register is kept from moving its entries by having each approved address wiped to none.
- What defeats the attempt is the tally each holder leaves in plain sight, and such a register is kept from moving its entries by having each approved address wiped to none.