create a spec for the stellar protocol

[tomerweller]

SCP is fairly well documented and the XDR schema files describe unambiguously the data structures used. However, the logic for applying transactions is mostly undocumented.

If someone would attempt to build a stellar-core compatible alternative, that fully implements the stellar protocol, the only complete source of truth at their disposal is the stellar-core codebase.

This might block innovation and diversification in stellar implementations.

For the sake of comparison, the ethereum yellowpaper fully defines the ethereum protocol.

[bobg]

👍 Being able to create a clean-room implementation is an important benchmark.