> ## Documentation Index
> Fetch the complete documentation index at: https://docs.theblockchainlibrary.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Casper FFG

> Ethereum's finality mechanism in which validators vote on checkpoints to finalize chain history.

# Casper FFG

Ethereum's finality mechanism in which validators vote on checkpoints to finalize chain history.

## Definition

Ethereum's finality mechanism in which validators vote on checkpoints to finalize chain history.

## Why it matters

Consensus concepts explain how independent nodes agree on one shared history without a central coordinator.

## Related knowledge

* [Block Producer](/generated/v2/glossary/block-producer) — term
* [Finality](/generated/v2/glossary/finality) — term
* [Proof of Stake](/generated/v2/books/proof-of-stake) — term
* [Validator](/generated/v2/glossary/validator) — term

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**Canonical knowledge ID:** `glossary:casper-ffg`