* minor: move checks into separate fn * add additional validity checks * simplify shuffling * Closes potential OOB weight * improve docs * fooo * remove obsolete comment * move filtering into the rollback-transaction Technically this is not necessary but avoids future footguns. * move check up and avoid duplicate checks * refactor: make sure backed candidates are sane, even more * doc wording Co-authored-by: Zeke Mostov <z.mostov@gmail.com> * refactor: avoid const generics for sake of wasm size `true` -> `FullCheck::Skip`, `false` -> `FullCheck::Yes`. * chore: unify `CandidateCheckContext` instance names * refactor: introduce `IndexedRetain` for `Vec<T>` * chore: make tests prefix free * doc: re-introduce removed comment * refactor: remove another const generic to save some wasm size Co-authored-by: Zeke Mostov <z.mostov@gmail.com>
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.