Hello there! This post is about a new trend in the Ethereum ecosystem that is becoming more and more famous, Layer 2. Probably you heard about that already somewhere, so if you wonder what is that exactly, and if it really matters to the future of Ethereum then let me introduce you to it as much as I can in a simple way.Problem with Ethereum.The common problem with big and popular blockchains until now is that they are getting congested from time to time. The cost for a single transaction on ...