Abstract: Embodiments of the present disclosure provide an operation and maintenance system and method. The operation and maintenance system comprises a plurality of interconnected modules including: a data acquisition module, a data storage module, an exception and fault labeling module, an automatic model training and assessment module, an operation and maintenance management and task execution module, and a result checking module.

Abstract: A blockchain system, and related devices, systems, and methods are provided. A blockchain node device node device receives a first message from a gaming device in communication with the blockchain node device, the first message including a request for first play data corresponding to historical wagering activity by a player and wagering limit data associated with a limitation on wagering activity by the player. The blockchain node transmits a first blockchain block of a plurality of blockchain blocks of a blockchain data structure to the gaming device, wherein the first blockchain block includes the first play data. The blockchain node receives a second message from the gaming device, the second message including a second blockchain block including hash data associated with the first blockchain block and second play data corresponding to further wagering activity by the player. The blockchain node adds the second blockchain block to the blockchain data structure.