* annoying whitespaces * update guide Add `CheckValidationOutputs` runtime api and also change the candidate-validation stuff * promote ValidationOutputs to global primitives i.e. move it from node specific primitives to global v1 primitives. This will be needed when we share it later in the runtime inclusion module * refactor acceptance checks in the inclusion module factor out the common code to share it during the block inclusion and for the forthcoming CheckValidationOutputs runtime api. Also note that the acceptance criteria was updated to incorporate checks that exist now in candidate-validation * plumb the runtime api outside * extract validation_data from ValidationOutputs * use runtime-api to check validation outputs apart from that refactor, update docs and tidy a bit * Update the maxium code size This is to fix a test that performs an upgrade.
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.