Blockchain is gradually improving processes in every sector from manufacturing to healthcare, finance, and education. Bitcoin became popular, later, Ethereum became the most talked-about public blockchain infrastructure. The rising popularity of both Bitcoin and Ethereum has made blockchain a transformative technology. But they both had their issues, especially related to transaction processing performance. The use of Proof-of-Work (PoW) in their consensus algorithm resulted in the extraordinary use of computing power to do mining, for creating a block. Also, the poor transaction processing speed: around 10 transactions per second made Bitcoin and Ethereum weak in comparison to traditional electronic payment systems like VISA and MasterCard.