what is proof-of-stake? multiple choice a requirement to define an expensive computer calculation, also called mining, that needs to be performed in order to create a new group of trustless transactions (blocks) on the distributed ledger or blockchain a way to validate transactions and achieve a distributed consensus a type of digital currency in which a record of transactions is maintained and new units of currency are generated by the computational solution of mathematical problems; it which operates independently of a central bank all of the answer choices are correct.