Introduction | zkPorter: Composable and Scalable Layer-2

Abstract We propose a new Layer-2 scaling technology "zkPorter" that can combine zkRollup and sharding in a highly scalable and atomically composable blockchain network. Problem #1: Transaction Throughput ≠ Scalability ⚖️ Transaction throughput is measured by the total number of transactions processed by the entire network; while scalability is measured by the number of transactions processed by a single node.