Bastian Köcher
4975521d48
* Notify collators about seconded collation This pr adds functionality to inform a collator that its collation was seconded by a parachain validator. Before this signed statement was only gossiped over the validation substream. Now, we explicitly send the seconded statement to the collator after it was validated successfully. Besides that it changes the `CollatorFn` to return an optional result sender that is informed when the build collation was seconded by a parachain validator. * Add test * Make sure we only send `Seconded` statements * Make sure we only receive valid statements * Review feedback
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.