A slot may or may not contain a block, but the last slot in an epoch is called a boundary slot or a checkpoint.An epoch is a unit of time 6.4 minutes in length which contains 64 slots, 6 seconds each.A fork choice rule is a function which, given some blockchain state S outputs a chain from genesis (first block) to S which can be considered the canonical (main, original) chain.Casper FFG stands for Casper, the Friendly Finality Gadget.LMD GHOST stands for Last Message Driven Greediest Heaviest Observed SubTree.Please shout at me if something needs additional clarifications. Note: it's going to get a little meta-technical from now on, but it should still be as readable as the rest of the Two Point Oh series. First some definitions to prep the terrain. That's important because the communication on the chain can be much faster if a block was just finalized, instantly signaling readiness without having to wait for confirmations. That's an approximate way to make sure a transaction is definitive and cannot be reversed or, in other words, that it is finalized.Įthereum 2.0 gives you finality as a guarantee, an objective truth enshrined in the blockchain instead of an approximation. You must have noticed that crypto platforms and dapps often wait for a few blocks before considering your transaction confirmed. Let's try and demistify them.įirst, let's try to understand what finality is useful for. It is Open-Source software which means that end users and developers have freedom to study, to improve and to redistribute the program ( BSD-style license).If you've heard the terms justification and finalization thrown around in the Ethereum 2.0 space but don't know what they mean, you're not alone. Localisation capability (for which volunteers are needed - please contact us!).Internationalisation: display any language on any operating system.Integrate with the shell (drag 'n' drop, and Context menu).Graphical user interface, command line interface, or library (.dll/.so/.dylib) versions available.Export information as text, CSV, HTML.View information in different formats (text, sheet, tree, HTML.).
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