Abstract: A device and a method for managing ledger data on a blockchain are provided. The device includes a traversing unit, a classifying unit and a suggesting unit. The traversing unit is configured to traverse a block where each invalid conflict transaction on the blockchain occurs and one or more previous transactions in a neighboring block thereof, until a previous transaction which causes the invalid conflict transaction is determined. The classifying unit is configured to classify conflict pairs each composed of the invalid conflict transaction and the previous transaction which causes the invalid conflict transaction into different conflict patterns. The suggesting unit is configured to provide, for each of the conflict patterns, a corresponding suggestion of improving a chaincode, to avoid occurrence of the invalid conflict transaction.

Abstract: A method for a computer to construct a test scenario and an information processing device are provided. The method for constructing a test scenario for a target application executed through a plurality of executable applications in distributed nodes in an asynchronous manner includes constructing an invocation relationship graph representing a plurality of functions included in the executable applications; determining, according to a code structure of each of the functions in the invocation relationship graph, one or more of a plurality of risk types which may cause an operation error for the function; traversing the invocation relationship graph to obtain possible function paths and determining, based on a plurality of risk types of functions in each of the possible function paths, risk types of the function path; and determining, according to the risk types of the function path, a type of a test scenario for the function path.