Blockchain-based fault tolerance

Systems, methods, and computer program products are provided for handling fault tolerance in a blockchain-based network system. The system comprises: a computing system having at least one of a plurality of processors, the at least one of the plurality of processors being arranged as an active processor node; at least one data storage device, wherein the at least one data storage device comprises a first ledger corresponding to the first block chain and a second ledger corresponding to the second block chain; at least one standby processor node; and at least one standby data storage device. The at least one active processor node is programmed or configured to: analyze a block corresponding to data received through the network system and record the block on the first ledger and the second ledger such that the first ledger and the second ledger have matching data; detecting at least one failure or expected failure; and generating a handover command in response to detecting the at least one failure or expected f