Polkadot Release Analysis v1.2.0
The following report is not an exhaustive list of changes included in the release, but a set of changes that we felt deserved to be highlighted due to their impact on the Polkadot ecosystem builders.
Please do not stop reading the release notes v1.2.0. This report is complementary to the changelogs, not a replacement.
Highlights are categorized into High Impact, Medium Impact, and Low Impact for ease of navigation.
Also there is a section related to all note worthy changes related to tooling integration.
Help us improve the release analysis by filling out this 6 question survey.
Summary
In the following report we are featuring some of the changes included in the polkadot node release 1.2.0. All the runtime changes that are part of this release will be included in the corresponding runtime release done by the polkadot technical fellowship.
Tooling Section
High Impact
[S] Remove deprecated pallet_balances’s set_balance_deprecated and transfer dispatchables
Why is this important?
pallet_balances provides functionality for handling accounts and balances.
As a part of #12951, below dispatchable functions have been deprecated:
set_balance_deprecatedtransfer
As a part of this PR, these functions have now been removed. Instead force_set_balance and transfer_allow_death should be used respectively.
Medium Impact
[S] asset-rate pallet: box asset kind parameter
Why is this important?
Asset-Rate pallet provides a means of setting conversion rates for some asset to native balance. This pallet has a config type AssetKind which defines the type for asset kinds for which the conversion rate to native balance is set.
This type parameter is being used in all dispatchables of this pallet. As a part of this PR, this type parameter has been Boxed.
Related PR: #1333
[P] Remove Polkadot & Kusama native runtime
Why is this important?
As a part of this PR, Polkadot and Kusama native runtime have been removed from Polkadot node.
There are some implications after this change:
- There won’t be
kusama/polkadot-devchain specs available. - The
try-runtimejob forPolkadot&Kusamawon’t be available anymore as there won’t be the dev chain specs anymore. - Certain benchmarking commands will also not work until they get migrated to use a runtime api.
- As from this change
--devwill run a Rococo based relaychain.
You can track the fixes of these issues here.
Related Issue: #603
[P] XCM: Deprecate old functions
PR: XCM: Deprecate old functions by gavofyork · Pull Request #1645 · paritytech/polkadot-sdk · GitHub
How does this impact the Polkadot builders?
teleport_assets and reserve_transfer_assets in pallet-xcm are now deprecated, please use their limited versions instead.
limited_teleport_assetslimited_reserve_transfer_assets
Low Impact
[S] Modular block request handler
PR: Modular block request handler by rahulksnv · Pull Request #1524 · paritytech/polkadot-sdk · GitHub
Why is this important?
Block request handler has been moved behind a trait. This allows new protocols to be plugged into ChainSync.
BuildNetworkParams has been changed so that custom relay protocol implementations can be (optionally) passed in during network creation time. If custom protocol is not specified, it defaults to the existing block handler.
BlockServer and BlockDownloader traits are introduced for the protocol implementation. The existing block handler has been changed to implement these traits.
How does this impact the Polkadot builders?
Users will need to adapt their parameters in BuildNetworkParams (usually found at initialization of the network in service.rs) to accomodate the above changes.
sc_service::build_network(sc_service::BuildNetworkParams {
config: parachain_config,
net_config,
client,
transaction_pool,
spawn_handle,
import_queue,
block_announce_validator_builder: Some(Box::new(move |_| block_announce_validator)),
warp_sync_params,
+ block_relay: None,
})
[P] Uncoupling pallet-xcm from frame-system’s RuntimeCall
Why is this change interesting for builders?
This PR uncouples pallet-xcm’s Config trait from frame-system’s RuntimeCall and instead uses it’s own RuntimeCall trait type, it also removes the trait requirement for it’s RuntimeCall to be IsType<<Self as frame_system::Config>::RuntimeCall>, meaning you can write custom types to be used for the XCM Transact instruction in a runtime that has pallet-xcm, which was previously not possible because of the hardcoded requirement imposed by pallet-xcm, which is not imposed by xcm-executor.
How does this impact the Polkadot builders?
This does not require any other changes to existing or future code, since all it does is make the trait requirements slightly less strict, maintaining compatibility but expanding it.
[C] The Ambassador Program
PR: https://github.com/paritytech/polkadot-sdk/pull/1308
Why is this important?
This is the on-chain aspect of the Polkadot Ambassador Program.
At a high-level, there are nine ranks, divided into four categories in this collective:
- Ambassadors (1-2 tiers)
- Senior Ambassadors (3-4 tiers)
- Head Ambassadors (5-7 tiers)
- Master Ambassadors (8-9 tiers)
Reference the PR for details on the AmbassadorReferenda, membership management, content management, and additional functionality.
Next steps will be to seed the program members, mint ambassador NFT badges on Asset Hub when promoting, and a Treasury pallet instance for the Ambassador Program!
[P/C] “Common good” vs “System” parachain clean up
Why is this important?
The term “common good parachain” is no longer used in favor of “system parachain”. You can see the discussion in Joe Petrowski’s speech at Decoded2023. This pull request fixes and aligns the codebase with that vision.
[S/P] Stabilize VersionedMigration
PR: Stabilize `VersionedMigration` by liamaharon · Pull Request #1503 · paritytech/polkadot-sdk · GitHub
Why is this important?
The experimental flag is being removed from VersionedMigration.
VersionedMigration is now considered stable to use in production.
If you’re curious how to use try-runtime-cli to test your chain, please start here.
[S/P/C] Disable Calls to Identity Pallet
Why is this important?
This PR prepares the runtime for moving the identity state and logic to a system parachain. This is done by filtering calls from the Identity pallet from all Relay Chain runtimes.
Once this change is enacted on the Relay chain, no more identity changes such as creating new identities or sub-identities will be possible on the Relay Chain. The frozen state will be part of the genesis for the system parachain. It is important to note that once the system parachain launches, the identity pallet and all its state will be removed from the Relay chain.
Applications and UI that depend on the identity pallet will need to read the relevant state from the system parachain instead.
[S/P/C] genesis-builder: implemented for all runtimes
PR: https://github.com/paritytech/polkadot-sdk/pull/1492
Why is this important?
A step towards GenesisConfig in a native runtime free world.
This PR implements GenesisBuilder API for every runtime in the polkadot-sdk repository. As shown in the code changes, users might want to take advantage of genesis_builder_helper for this.
