Examining Bitcoin mempools Resemblance Using Jaccard Similarity Index

Abstract

In Bitcoin, memory pool is a space of unconfirmed transactions. when a node receives newly generated transactions, the node verifies it and appends it into the local mempool. The transactions are stored in the mempool until they get included in a newly mined block. Since each node has a different capacity for storing unconfirmed transactions; thus, each node has different transactions stored in mempool. In this paper, we examine the mempool similarity using the Jaccard Index among four Bitcoin full nodes.