Upgrading Ethereum

A technical handbook on Ethereum’s move to proof of stake and beyond

Aka “The Eth2 Book”.

This is a work in progress. It is not a small project, and will take some time to complete. I appreciate your patience.

Editions

Editions follow the naming of Ethereum consensus layer upgrades:

• Edition 0.3: Capella [current WIP]
• Edition 0.2: Bellatrix
• Edition 0.1: Altair
• My original Phase 0 Annotated Specification remains available elsewhere for historical interest.

The latest version is always at https://eth2book.info/latest/. It currently points to the Capella edition. Earlier editions are now frozen as-is, but are of historical interest as the protocol continues to change.

A PDF version is available.

The source material and everything needed to build the site and the PDF is available on GitHub.

Coffee

Kind souls sometimes ask for a way to send me a cup of coffee or make a donation. My account info is below - donations are absolutely not expected or necessary, but are always very encouraging and gratefully received.

• 0xd262d146e869915444d0f34ecdaabab5ab43007e on Ethereum, ZkSync, Polygon, Optimism, Arbitrum.
• Also at benjaminion.eth

Any whales or large treasuries out there, I encourage you to take a look at the Protocol Guild which supports the people developing and maintaining our incredible technology, not just writing about it.