Incentive for Historical Block Data Sharing in Blockchain

Abstract

In blockchain, delivering block data, especially delivering all historical blocks to a new node, will cost lots of bandwidth consumption. This cost may dissuade nodes from sharing their blocks to new or rejoined peer. In this paper, we present some incentive schemes for this kind of data sharing behaviour. In our design, node participating in delivering their storage data to their peers can get some rewards from the node who request the data. We adopt coin-locking strategy to discourage dishonest behaviour in the sharing process. Nodes need not put a large deposit to big data sharing since the data sharing process can be divided into smaller ones, and micropayment channel is set to accelerate the speed of during each small transmitting process. We give a theoretical analysis of our mechanism and discuss its practical application of data sharing in some mainstream cryptocurrencies and blockchains in IoT industry.