BLOCKCHAIN WITH NON-TURING COMPLETE SYSTEM GUARDS

摘要

A system manages blockchain transactions through the use of guards and sentinels. Guards process data prior to the data's commitment to the blockchain by enforcing schema and access controls. Guards also send invalidation messages when a change to the blockchain invalidates a sentinel's view of what is true about the blockchain. Sentinels provide an interface to the blockchain for users and applications to develop data and queries to the blockchain, via in some embodiments, an application program interface. Sentinels also receive invalidation messages and take steps to determine the new state of the blockchain and take any additional actions responsive to the change. These actions may include complex responses involving, in some cases, addition of new blocks to the blockchain. Data additions proposed by a sentinel are still checked by the guards for conformance to establish rules and access controls.