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Muharem
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### Summary This PR introduces new dispatchables to the treasury pallet, allowing spends of various asset types. The enhanced features of the treasury pallet, in conjunction with the asset-rate pallet, are set up and enabled for Westend and Rococo. ### Westend and Rococo runtimes. Polkadot/Kusams/Rococo Treasury can accept proposals for `spends` of various asset kinds by specifying the asset's location and ID. #### Treasury Instance New Dispatchables: - `spend(AssetKind, AssetBalance, Beneficiary, Option<ValidFrom>)` - propose and approve a spend; - `payout(SpendIndex)` - payout an approved spend or retry a failed payout - `check_payment(SpendIndex)` - check the status of a payout; - `void_spend(SpendIndex)` - void previously approved spend; > existing spend dispatchable renamed to spend_local in this context, the `AssetKind` parameter contains the asset's location and it's corresponding `asset_id`, for example: `USDT` on `AssetHub`, ``` rust location = MultiLocation(0, X1(Parachain(1000))) asset_id = MultiLocation(0, X2(PalletInstance(50), GeneralIndex(1984))) ``` the `Beneficiary` parameter is a `MultiLocation` in the context of the asset's location, for example ``` rust // the Fellowship salary pallet's location / account FellowshipSalaryPallet = MultiLocation(1, X2(Parachain(1001), PalletInstance(64))) // or custom `AccountId` Alice = MultiLocation(0, AccountId32(network: None, id: [1,...])) ``` the `AssetBalance` represents the amount of the `AssetKind` to be transferred to the `Beneficiary`. For permission checks, the asset amount is converted to the native amount and compared against the maximum spendable amount determined by the commanding spend origin. the `spend` dispatchable allows for batching spends with different `ValidFrom` arguments, enabling milestone-based spending. If the expectations tied to an approved spend are not met, it is possible to void the spend later using the `void_spend` dispatchable. Asset Rate Pallet provides the conversion rate from the `AssetKind` to the native balance. #### Asset Rate Instance Dispatchables: - `create(AssetKind, Rate)` - initialize a conversion rate to the native balance for the given asset - `update(AssetKind, Rate)` - update the conversion rate to the native balance for the given asset - `remove(AssetKind)` - remove an existing conversion rate to the native balance for the given asset the pallet's dispatchables can be executed by the Root or Treasurer origins. ### Treasury Pallet Treasury Pallet can accept proposals for `spends` of various asset kinds and pay them out through the implementation of the `Pay` trait. New Dispatchables: - `spend(Config::AssetKind, AssetBalance, Config::Beneficiary, Option<ValidFrom>)` - propose and approve a spend; - `payout(SpendIndex)` - payout an approved spend or retry a failed payout; - `check_payment(SpendIndex)` - check the status of a payout; - `void_spend(SpendIndex)` - void previously approved spend; > existing spend dispatchable renamed to spend_local The parameters' types of the `spend` dispatchable exposed via the pallet's `Config` and allows to propose and accept a spend of a certain amount. An approved spend can be claimed via the `payout` within the `Config::SpendPeriod`. Clients provide an implementation of the `Pay` trait which can pay an asset of the `AssetKind` to the `Beneficiary` in `AssetBalance` units. The implementation of the Pay trait might not have an immediate final payment status, for example if implemented over `XCM` and the actual transfer happens on a remote chain. The `check_status` dispatchable can be executed to update the spend's payment state and retry the `payout` if the payment has failed. --------- Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com> Co-authored-by: command-bot <>
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.