 Sam Johnson
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ac3f14d23b
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Tasks: general system for recognizing and executing service work (#1343)
`polkadot-sdk` version of original tasks PR located here:
https://github.com/paritytech/substrate/pull/14329
Fixes #206
## Status
- [x] Generic `Task` trait
- [x] `RuntimeTask` aggregated enum, compatible with
`construct_runtime!`
- [x] Casting between `Task` and `RuntimeTask` without needing `dyn` or
`Box`
- [x] Tasks Example pallet
- [x] Runtime tests for Tasks example pallet
- [x] Parsing for task-related macros
- [x] Retrofit parsing to make macros optional
- [x] Expansion for task-related macros
- [x] Adds support for args in tasks
- [x] Retrofit tasks example pallet to use macros instead of manual
syntax
- [x] Weights
- [x] Cleanup
- [x] UI tests
- [x] Docs
## Target Syntax
Adapted from
https://github.com/paritytech/polkadot-sdk/issues/206#issue-1865172283
```rust
// NOTE: this enum is optional and is auto-generated by the other macros if not present
#[pallet::task]
pub enum Task<T: Config> {
AddNumberIntoTotal {
i: u32,
}
}
/// Some running total.
#[pallet::storage]
pub(super) type Total<T: Config<I>, I: 'static = ()> =
StorageValue<_, (u32, u32), ValueQuery>;
/// Numbers to be added into the total.
#[pallet::storage]
pub(super) type Numbers<T: Config<I>, I: 'static = ()> =
StorageMap<_, Twox64Concat, u32, u32, OptionQuery>;
#[pallet::tasks_experimental]
impl<T: Config<I>, I: 'static> Pallet<T, I> {
/// Add a pair of numbers into the totals and remove them.
#[pallet::task_list(Numbers::<T, I>::iter_keys())]
#[pallet::task_condition(|i| Numbers::<T, I>::contains_key(i))]
#[pallet::task_index(0)]
pub fn add_number_into_total(i: u32) -> DispatchResult {
let v = Numbers::<T, I>::take(i).ok_or(Error::<T, I>::NotFound)?;
Total::<T, I>::mutate(|(total_keys, total_values)| {
*total_keys += i;
*total_values += v;
});
Ok(())
}
}
```
---------
Co-authored-by: Nikhil Gupta <17176722+gupnik@users.noreply.github.com>
Co-authored-by: kianenigma <kian@parity.io>
Co-authored-by: Nikhil Gupta <>
Co-authored-by: Gavin Wood <gavin@parity.io>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: gupnik <nikhilgupta.iitk@gmail.com>
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2023-12-08 11:10:26 +05:30 |
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