pallet_example_tasks/
lib.rs1#![cfg_attr(not(feature = "std"), no_std)]
20
21use frame_support::dispatch::DispatchResult;
22use frame_system::offchain::CreateBare;
23#[cfg(feature = "experimental")]
24use frame_system::offchain::SubmitTransaction;
25pub use pallet::*;
27
28pub mod mock;
29pub mod tests;
30
31#[cfg(feature = "runtime-benchmarks")]
32mod benchmarking;
33
34pub mod weights;
35pub use weights::*;
36
37#[cfg(feature = "experimental")]
38const LOG_TARGET: &str = "pallet-example-tasks";
39
40#[frame_support::pallet(dev_mode)]
41pub mod pallet {
42 use super::*;
43 use frame_support::pallet_prelude::*;
44 use frame_system::pallet_prelude::*;
45
46 #[pallet::error]
47 pub enum Error<T> {
48 NotFound,
50 }
51
52 #[pallet::tasks_experimental]
53 impl<T: Config> Pallet<T> {
54 #[pallet::task_list(Numbers::<T>::iter_keys())]
56 #[pallet::task_condition(|i| Numbers::<T>::contains_key(i))]
57 #[pallet::task_weight(T::WeightInfo::add_number_into_total())]
58 #[pallet::task_index(0)]
59 pub fn add_number_into_total(i: u32) -> DispatchResult {
60 let v = Numbers::<T>::take(i).ok_or(Error::<T>::NotFound)?;
61 Total::<T>::mutate(|(total_keys, total_values)| {
62 *total_keys += i;
63 *total_values += v;
64 });
65 Ok(())
66 }
67 }
68
69 #[pallet::hooks]
70 impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
71 #[cfg(feature = "experimental")]
72 fn offchain_worker(_block_number: BlockNumberFor<T>) {
73 if let Some(key) = Numbers::<T>::iter_keys().next() {
74 let task = Task::<T>::AddNumberIntoTotal { i: key };
76 let runtime_task = <T as Config>::RuntimeTask::from(task);
77 let call = frame_system::Call::<T>::do_task { task: runtime_task.into() };
78
79 let xt = <T as CreateBare<frame_system::Call<T>>>::create_bare(call.into());
81 let res = SubmitTransaction::<T, frame_system::Call<T>>::submit_transaction(xt);
82 match res {
83 Ok(_) => log::info!(target: LOG_TARGET, "Submitted the task."),
84 Err(e) => log::error!(target: LOG_TARGET, "Error submitting task: {:?}", e),
85 }
86 }
87 }
88
89 #[cfg(not(feature = "experimental"))]
90 fn offchain_worker(_block_number: BlockNumberFor<T>) {}
91 }
92
93 #[pallet::config]
94 pub trait Config: CreateBare<frame_system::Call<Self>> + frame_system::Config {
95 type RuntimeTask: frame_support::traits::Task
96 + IsType<<Self as frame_system::Config>::RuntimeTask>
97 + From<Task<Self>>;
98 type WeightInfo: WeightInfo;
99 }
100
101 #[pallet::pallet]
102 pub struct Pallet<T>(_);
103
104 #[pallet::storage]
106 pub type Total<T: Config> = StorageValue<_, (u32, u32), ValueQuery>;
107
108 #[pallet::storage]
110 pub type Numbers<T: Config> = StorageMap<_, Twox64Concat, u32, u32, OptionQuery>;
111}