Andrei Sandu
c16fcc47bc
Changes the way we perform the random selection of backed candidates when there isn't enough room for all of them. Instead of picking individual backed candidates `apply_weight` now operates on chains of candidates. This is fully backwards compatible and relies on the node side (provisioner/prospective parachains) doing the heavy lifting and providing the candidates in the order they form a chain. The same approach can be implemented for bitfields random selection once https://github.com/paritytech/polkadot-sdk/pull/3479 is merged. The approach taken in this PR aims for reduced additional complexity at the cost of being less fair wrt how many backed candidates from each chain are picked. It favors elastic scaling parachains vs parachains not using elastic scaling, but from my perspective it should be fine as this should happen under exceptional circumstances like dispute storms. Note: to make things more fair we can consider specializing `random_sel` such that it will try to pick candidates one by one in the order provided by the provisioner such that non elastic scaling parachains have the same chance of getting a candidate backed. --------- Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>
NOTE: We have recently made significant changes to our repository structure. In order to streamline our development process and foster better contributions, we have merged three separate repositories Cumulus, Substrate and Polkadot into this repository. Read more about the changes here.
Polkadot SDK
The Polkadot SDK repository provides all the resources needed to start building on the Polkadot network, a multi-chain blockchain platform that enables different blockchains to interoperate and share information in a secure and scalable way. The Polkadot SDK comprises three main pieces of software:
Polkadot
Implementation of a node for the https://polkadot.network in Rust, using the Substrate framework. This directory
currently contains runtimes for the Westend and Rococo test networks. Polkadot, Kusama and their system chain runtimes
are located in the runtimes repository maintained by
the Polkadot Technical Fellowship.
Substrate
Substrate is the primary blockchain SDK used by developers to create the parachains that make up the Polkadot network. Additionally, it allows for the development of self-sovereign blockchains that operate completely independently of Polkadot.
Cumulus
Cumulus is a set of tools for writing Substrate-based Polkadot parachains.
Releases
Note
Our release process is still Work-In-Progress and may not yet reflect the aspired outline here.
The Polkadot-SDK has two release channels: stable and nightly. Production software is advised to only use stable.
nightly is meant for tinkerers to try out the latest features. The detailed release process is described in
RELEASE.md.
Stable
stable releases have a support duration of three months. In this period, the release will not have any breaking
changes. It will receive bug fixes, security fixes, performance fixes and new non-breaking features on a two week
cadence.
Nightly
nightly releases are released every night from the master branch, potentially with breaking changes. They have
pre-release version numbers in the format major.0.0-nightlyYYMMDD.
Upstream Dependencies
Below are the primary upstream dependencies utilized in this project:
Security
The security policy and procedures can be found in docs/contributor/SECURITY.md.
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Ensure you follow our contribution guidelines. In every interaction and contribution, this project adheres to the Contributor Covenant Code of Conduct.
Additional Resources
- For monitoring upcoming changes and current proposals related to the technical implementation of the Polkadot network,
visit the
Requests for Comment (RFC)repository. While it's maintained by the Polkadot Fellowship, the RFC process welcomes contributions from everyone.