…-chain transactions while relying on the underlying ethereum blockchain to ground its security. But Plasma takes the idea in a new direction, by allowing for the creation of “child” blockchains attached to the “main” ethereum blockchain. These child-chains can, in turn, spawn their own child-chains, who can spawn their own child-chains, and so on.
…ich is currently focused on building a network of payment channels, using a similar paradigm as the lightning network. This means that rather than have to open up a channel with the specific person(s) you want to transact with, you can open up a single channel with an entity connected to a much larger network of channels, enabling you to make payments to anyone else connected to the same network without additional fees.