Ethereum Data Structures (2020)

This 2020 document by Kamil Jezek summarizes the data structures, hashing functions and coding functions used by the Ethereum platform. It was written because the main source, the Yellow paper, balances brevity and detail unevenly, being very detailed in some parts and too shallow in others. The author also says informal blogs are often too vague and in some cases contain incorrect information. The document aims to give sufficient detail while staying brief, pairing a formal view with examples to improve clarity.