Here are various essays related to multiple methods of how to do a specific things. Currently it mostly hosts stuff related to Ethereum Classic. Those are maintained by Wei Tang.
Ethereum and Ethereum Classic Essays
Essays related to improvements in Ethereum and Ethereum Classic development.
How to add new precompiled contracts to an existing Ethereum blockchain without hard forks.
Ethereum’s precompiled contacts create “shortcuts” in the Ethereum Virtual Machine to speed up common computations like elliptic curve and SHA256. In the past, adding a new precompiled contract requires a hard-fork of the whole network. In this essay, we show that there is a way to adding new precompiled contracts without needing a hard-fork, and why this approach is safe.