If you’ve been around the Blockchain scene for a while, you would have heard of lightning network, a proposed scalability solution for Bitcoin. Some might think “this sounds very similar to lightning”, and you would be right. Lightning uses channels to help do transfers. You have to remember Bitcoin was 1st generation Blockchain, way before Ethereum, and smart contracts only came into being with Ethereum 2nd generation Blockchain. Smart contracts are the core building blocks for Blockchains these days