A blockchain index structure based on subchain query

Abstract Blockchain technology has the characteristics of decentralization and tamper resistance, which can store data safely reduce cost trust effectively. However, existing blockchain system weak performance in management, only supports traversal queries with transaction hashes as keywords. The query method based on account trace chain (ATTC) improves efficiency historical transactions account. querying accounts longer chains not been effectively improved. Given inefficiency single ATTC index query, we propose a subchain-based (SCATC) structure. First, is divided into subchains, last block each subchain connected by hash pointer. block-by-block mode converted to subchain-by-subchain mode, shortens path. Multiple same are merged stored, simplifies construction saves storage resources. then, algorithm given for SCATC Simulation analysis shows that structure significantly efficiency.