Alexandru Vasile
7430f41350
This PR ensures that the chainHead RPC class can be called only from within the same connection context. The chainHead methods are now registered as raw methods. - https://github.com/paritytech/jsonrpsee/pull/1297 The concept of raw methods is introduced in jsonrpsee, which is an async method that exposes the connection ID: The raw method doesn't have the concept of a blocking method. Previously blocking methods are now spawning a blocking task to handle their blocking (ie DB) access. We spawn the same number of tasks as before, however we do that explicitly. Another approach would be implementing a RPC middleware that captures and decodes the method parameters: - https://github.com/paritytech/polkadot-sdk/pull/3343 However, that approach is prone to errors since the methods are hardcoded by name. Performace is affected by the double deserialization that needs to happen to extract the subscription ID we'd like to limit. Once from the middleware, and once from the methods itself. This PR paves the way to implement the chainHead connection limiter: - https://github.com/paritytech/polkadot-sdk/issues/1505 Registering tokens (subscription ID / operation ID) on the `RpcConnections` could be extended to return an error when the maximum number of operations is reached. While at it, have added an integration-test to ensure that chainHead methods can be called from within the same connection context. Before this is merged, a new JsonRPC release should be made to expose the `raw-methods`: - [x] Use jsonrpsee from crates io (blocked by: https://github.com/paritytech/jsonrpsee/pull/1297) Closes: https://github.com/paritytech/polkadot-sdk/issues/3207 cc @paritytech/subxt-team --------- Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>
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.
Contributing & Code of Conduct
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.