Bastian Köcher
a4662104db
This pr changes the collator interface function to return an optional collation instead of a collation. This is required as the parachain itself can fail to generate a valid collation for various reason. Now if the collation fails it will return `None`. Besides that the pr adds some `RuntimeDebug` derive for `ValidationData` and removes some whitespaces.
Preamble
This document aims to describe the purpose, functionality, and implementation of the host for Polkadot's parachains functionality - that is, the software which provides security and advancement for constituent parachains. It is not for the implementer of a specific parachain but rather for the implementer of the Parachain Host. In practice, this is for the implementers of Polkadot in general.
There are a number of other documents describing the research in more detail. All referenced documents will be linked here and should be read alongside this document for the best understanding of the full picture. However, this is the only document which aims to describe key aspects of Polkadot's particular instantiation of much of that research down to low-level technical details and software architecture.