Fundamentals
Protocol concepts compared across chains: what the same word means on each.
Fundamentals posts explain a protocol concept and what it changes for someone reading the chain from a backend: how the same word differs between networks, which RPC methods expose it, and where the abstraction leaks. They are written for engineers who already ship code and need the mechanism rather than the marketing summary. Each post ends with a dated list of primary sources. Docs · Learn
Glamsterdam went live on Sepolia, then Hoodi was postponed: what Ethereum RPC users should do
Two dated events from the Ethereum Foundation blog, one fork that happened and one that did not, and a short list of checks for anyone who reads chain data or sets gas limits.
Processed, safe, finalized: what "final" means on Solana, Ethereum, Stellar, TON and sequencer L2s
Every chain has a word for "this won't change any more", and the words do not line up. A mapping of the five models, what each API lets you ask for, and how to pick a threshold for a deposit versus a UI.
Priority fees on Solana vs Ethereum, Base and Polygon: same word, different auctions
A "priority fee" is a bid in every system that uses the word, but what it bids for, who receives it and how you should estimate it differ per chain — and on one chain it buys nothing at all.