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Dastan
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# Description - What does this PR do? While working with `pallet_nfts` through `nonfungibles_v2` traits `Inspect, Mutate`, I found out that once you have set the collection attribute with `<Nfts as Mutate>::set_collection_attribute()`, it's not possible to read it with `<Nfts as Inspect>::collection_attribute()` since they use different `namespace` values. When setting the attribute, `AttributeNamespace::Pallet` is used, while `AttributeNamespace::CollectionOwner` is used when reading. more context: https://github.com/freeverseio/laos/issues/7#issuecomment-1766137370 This PR makes `item` an optional parameter in `Inspect::system_attribute()`, to be able to read collection attributes. - Why are these changes needed? To be able to read collection level attributes when reading attributes of the collection. It will be possible to read collection attributes by passing `None` for `item` - How were these changes implemented and what do they affect? `NftsApi` is also affected and `NftsApi::system_attribute()` now accepts optional `item` parameter. ## Breaking change Because of the change in the `NftsApi::system_attribute()` method's `item` param, parachains who integrated the `NftsApi` need to update their API code and frontend integrations accordingly. AssetHubs are unaffected since the NftsApi wasn't released on those parachains yet.
Assets Parachain
Implementation of Asset Hub, a blockchain to support generic assets in the Polkadot and Kusama networks. Asset Hub was formerly known as "Statemint".
Asset Hub allows users to:
- Deploy promise-backed assets, both fungible and non-fungible, with a DOT/KSM deposit.
- Set admin roles to manage assets and asset classes.
- Register assets as "self-sufficient" if the Relay Chain agrees, i.e. gain the ability for an asset to justify the existance of accounts sans DOT/KSM.
- Pay transaction fees using sufficient assets.
- Transfer (and approve transfer) assets.
- Interact with the chain via its transactional API or XCM.
Asset Hub must stay fully aligned with the Relay Chain it is connected to. As such, it will accept the Relay Chain's governance origins as its own.
See the article on Asset Hub as common good parachain for a higher level description.
Wallets, custodians, etc. should see the Polkadot Wiki's Integration Guide for details about support.