Adaptive Proof of Work Architecture Design by Implementing Multiple Mempool

Several studies have been carried out to improve the blockchain’s Proof of Work (PoW) consensus method because it weakens its consensus latency. This is in addition to the introduction of consensus mechanisms, ranging from Proof of Stake (PoS) to Flexible Proof of Activity (PoA). However, these mechanisms are unable to increase latency significantly. In this study, an adaptive PoW framework design was developed by applying multiple mempool, which impact differences in the transaction speed of each transaction. The proposed method can facilitate different levels of consensus difficulty in each transaction. The difficulty level adjustment in PoW is based on collected and processed transaction data to obtain the level of importance in each transaction. The difficulty level in baseline PoW is used as the maximum level of the developed adaptive process, followed by their definition. Finally, higher difficulty levels are assigned to more critical transactions and vice versa. Therefore, the latency will increase as the consensus difficulty level rises and vice versa. Initial simulation results showed that when tested with 6,000 transaction data, the adaptive PoW framework design can increase the average number of transactions per second by up to 400%.