When interacting with a consensus client via the Beacon API, you’ll get a finalized field as part of the response in some endpoints. I implemented that in Lighthouse, and in this essay I will explain what finality is, and how it works. Ben Edgington wrote a great definition of finality in Upgrading Ethereum:Finality is the idea that there are blocks that will never be reverted. When a block has been finalized, all the honest nodes on the network have agreed that the block will forever remain ...