Method and blockchain for constructing sub blockchain in blockchain system comprising distributed network of plurality of nodes

摘要

A method for constructing a sub-blockchain in a blockchain system comprising a distributed network of nodes comprises generating and propagating, by one of the nodes, a candidate sub-block comprised in a sub-blockchain to be connected to one of main blocks included in a main blockchain; validating the candidate sub-block and storing and propagating the validated candidate sub-block by one of the nodes; validating a content block received from a node which generated the candidate sub-block corresponding to content queried by a user and storing and propagating an end block connected to the content block by one of the nodes; and if the number of the same end blocks received from other nodes is larger than a preconfigured value, generating an approved sub-block, and propagating the approved sub-block by one of the nodes while updating the approved sub-block to a local copy of a blockchain.