Analysis of incentive mechanism in Repchain

In recent years, the blockchain that is the basis of Bitcoin has received much attention. However, the blockchain also faces many challenges, such as security and scalability, which have been the subject of recent researches. Much work has been done to solve the scalability problem in blockchain; one of these methods is sharding. This method is based on dividing the network into different groups and validating transactions in parallel. These methods use traditional consensus algorithms. One of the problems in this regard is the incentive that should be provided for nodes to participate in these consensus algorithms. In this paper, Repchain, one of the existing methods in this field, is examined, and the problems that this method has is analyzed. Next, it is proved that the proposed method causes the network nodes not to follow the protocol and also causes collusion between network nodes.