Polkadot stable2512-8

This release contains the changes from polkadot-stable2512-6 to polkadot-stable2512-8.

ℹ️ Please note:

⚠️ This is a patch release for the stable version: stable2512 and contains only patches and fixes to the crates (list
below). No binary or docker images will be provided for this release.

The tag corresponding to the current patch release polkadot-stable2512-8 and matching the old pattern will be
available under polkadot-v1.21.7.
The following crates were updated to the corresponding versions:

Crates list

• sc-consensus-beefy@34.0.1
• sc-consensus-grandpa@0.40.1

Changelog

Changelog for Node Dev

ℹ️ These changes are relevant to: Those who build around the client side code. Alternative client builders, SMOLDOT, those who consume RPCs. These are people who are oblivious to the runtime changes. They only care about the meta-protocol, not the protocol itself.

[#12767]: grandpa: Revert memory changes synced with db

This PR keeps the in memory changes synced with the DB ones in grandpa.
While at it, have added a few tests and changed the API a bit

Changelog for Node Operator

ℹ️ These changes are relevant to: Those who don't write any code and only run code.

[#12812]: beefy: lower peer reputation for bad responses

Bad BEEFY justifications are refused and also the sending peer penalized.

Rust compiler versions

This release was built and tested against the following versions of rustc.
Other versions may work.

• Rust Stable: 1.88.0