pub struct Pallet<T>(_);
Expand description

The pallet implementing the on-chain logic.

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impl<T: Config> Pallet<T>

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pub fn signed_submissions() -> SignedSubmissions<T>

Self accessor for SignedSubmission<T>.

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pub fn finalize_signed_phase() -> bool

Finish the signed phase. Process the signed submissions from best to worse until a valid one is found, rewarding the best one and slashing the invalid ones along the way.

Returns true if we have a good solution in the signed phase.

This drains the SignedSubmissions, potentially storing the best valid one in QueuedSolution.

This is a self-weighing function, it automatically registers its weight internally when being called.

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pub fn finalize_signed_phase_accept_solution( ready_solution: ReadySolution<T>, who: &T::AccountId, deposit: BalanceOf<T>, call_fee: BalanceOf<T> )

Helper function for the case where a solution is accepted in the signed phase.

Extracted to facilitate with weight calculation.

Infallible

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pub fn finalize_signed_phase_reject_solution( who: &T::AccountId, deposit: BalanceOf<T> )

Helper function for the case where a solution is accepted in the rejected phase.

Extracted to facilitate with weight calculation.

Infallible

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pub fn solution_weight_of( raw_solution: &RawSolution<SolutionOf<T::MinerConfig>>, size: SolutionOrSnapshotSize ) -> Weight

The weight of the given raw solution.

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pub fn deposit_for( raw_solution: &RawSolution<SolutionOf<T::MinerConfig>>, size: SolutionOrSnapshotSize ) -> BalanceOf<T>

Collect a sufficient deposit to store this solution.

The deposit is composed of 3 main elements:

  1. base deposit, fixed for all submissions.
  2. a per-byte deposit, for renting the state usage.
  3. a per-weight deposit, for the potential weight usage in an upcoming on_initialize
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impl<T: Config> Pallet<T>

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pub fn mine_solution( ) -> Result<(RawSolution<SolutionOf<T::MinerConfig>>, SolutionOrSnapshotSize), MinerError>

Mine a new npos solution.

The Npos Solver type, S, must have the same AccountId and Error type as the crate::Config::Solver in order to create a unified return type.

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pub fn restore_or_compute_then_maybe_submit() -> Result<(), MinerError>

Attempt to restore a solution from cache. Otherwise, compute it fresh. Either way, submit if our call’s score is greater than that of the cached solution.

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pub fn mine_check_save_submit() -> Result<(), MinerError>

Mine a new solution, cache it, and submit it back to the chain as an unsigned transaction.

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pub fn mine_checked_call() -> Result<Call<T>, MinerError>

Mine a new solution as a call. Performs all checks.

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pub fn basic_checks( raw_solution: &RawSolution<SolutionOf<T::MinerConfig>>, solution_type: &str ) -> Result<(), MinerError>

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pub fn mine_and_check( ) -> Result<(RawSolution<SolutionOf<T::MinerConfig>>, SolutionOrSnapshotSize), MinerError>

Mine a new npos solution, with all the relevant checks to make sure that it will be accepted to the chain.

If you want an unchecked solution, use Pallet::mine_solution. If you want a checked solution and submit it at the same time, use Pallet::mine_check_save_submit.

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pub fn ensure_offchain_repeat_frequency( now: T::BlockNumber ) -> Result<(), MinerError>

Checks if an execution of the offchain worker is permitted at the given block number, or not.

This makes sure that

  1. we don’t run on previous blocks in case of a re-org
  2. we don’t run twice within a window of length T::OffchainRepeat.

Returns Ok(()) if offchain worker limit is respected, Err(reason) otherwise. If Ok() is returned, now is written in storage and will be used in further calls as the baseline.

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pub fn unsigned_pre_dispatch_checks( raw_solution: &RawSolution<SolutionOf<T::MinerConfig>> ) -> DispatchResult

Do the basics checks that MUST happen during the validation and pre-dispatch of an unsigned transaction.

Can optionally also be called during dispatch, if needed.

NOTE: Ideally, these tests should move more and more outside of this and more to the miner’s code, so that we do less and less storage reads here.

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impl<T: Config> Pallet<T>

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pub fn submit_unsigned( origin: OriginFor<T>, raw_solution: Box<RawSolution<SolutionOf<T::MinerConfig>>>, witness: SolutionOrSnapshotSize ) -> DispatchResult

Submit a solution for the unsigned phase.

The dispatch origin fo this call must be none.

This submission is checked on the fly. Moreover, this unsigned solution is only validated when submitted to the pool from the local node. Effectively, this means that only active validators can submit this transaction when authoring a block (similar to an inherent).

To prevent any incorrect solution (and thus wasted time/weight), this transaction will panic if the solution submitted by the validator is invalid in any way, effectively putting their authoring reward at risk.

No deposit or reward is associated with this submission.

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pub fn set_minimum_untrusted_score( origin: OriginFor<T>, maybe_next_score: Option<ElectionScore> ) -> DispatchResult

Set a new value for MinimumUntrustedScore.

Dispatch origin must be aligned with T::ForceOrigin.

This check can be turned off by setting the value to None.

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pub fn set_emergency_election_result( origin: OriginFor<T>, supports: Supports<T::AccountId> ) -> DispatchResult

Set a solution in the queue, to be handed out to the client of this pallet in the next call to ElectionProvider::elect.

This can only be set by T::ForceOrigin, and only when the phase is Emergency.

The solution is not checked for any feasibility and is assumed to be trustworthy, as any feasibility check itself can in principle cause the election process to fail (due to memory/weight constrains).

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pub fn submit( origin: OriginFor<T>, raw_solution: Box<RawSolution<SolutionOf<T::MinerConfig>>> ) -> DispatchResult

Submit a solution for the signed phase.

The dispatch origin fo this call must be signed.

The solution is potentially queued, based on the claimed score and processed at the end of the signed phase.

A deposit is reserved and recorded for the solution. Based on the outcome, the solution might be rewarded, slashed, or get all or a part of the deposit back.

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pub fn governance_fallback( origin: OriginFor<T>, maybe_max_voters: Option<u32>, maybe_max_targets: Option<u32> ) -> DispatchResult

Trigger the governance fallback.

This can only be called when Phase::Emergency is enabled, as an alternative to calling Call::set_emergency_election_result.

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impl<T: Config> Pallet<T>

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pub fn round() -> u32

Internal counter for the number of rounds.

This is useful for de-duplication of transactions submitted to the pool, and general diagnostics of the pallet.

This is merely incremented once per every time that an upstream elect is called.

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impl<T: Config> Pallet<T>

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pub fn current_phase() -> Phase<T::BlockNumber>

Current phase.

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impl<T: Config> Pallet<T>

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pub fn queued_solution() -> Option<ReadySolution<T>>

Current best solution, signed or unsigned, queued to be returned upon elect.

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impl<T: Config> Pallet<T>

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pub fn snapshot() -> Option<RoundSnapshot<T>>

Snapshot data of the round.

This is created at the beginning of the signed phase and cleared upon calling elect.

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impl<T: Config> Pallet<T>

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pub fn desired_targets() -> Option<u32>

Desired number of targets to elect for this round.

Only exists when Snapshot is present.

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impl<T: Config> Pallet<T>

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pub fn snapshot_metadata() -> Option<SolutionOrSnapshotSize>

The metadata of the RoundSnapshot

Only exists when Snapshot is present.

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impl<T: Config> Pallet<T>

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pub fn minimum_untrusted_score() -> Option<ElectionScore>

The minimum score that each ‘untrusted’ solution must attain in order to be considered feasible.

Can be set via set_minimum_untrusted_score.

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impl<T: Config> Pallet<T>

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pub fn create_snapshot() -> Result<(), ElectionError<T>>

Creates the snapshot. Writes new data to:

  1. SnapshotMetadata
  2. RoundSnapshot
  3. DesiredTargets

Returns Ok(()) if operation is okay.

This is a self-weighing function, it will register its own extra weight as DispatchClass::Mandatory with the system pallet.

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pub fn kill_snapshot()

Kill everything created by Pallet::create_snapshot.

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pub fn feasibility_check( raw_solution: RawSolution<SolutionOf<T::MinerConfig>>, compute: ElectionCompute ) -> Result<ReadySolution<T>, FeasibilityError>

Checks the feasibility of a solution.

Trait Implementations§

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impl<T: Config> Callable<T> for Pallet<T>

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impl<T> Clone for Pallet<T>

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T> Debug for Pallet<T>

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fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<T: Config> ElectionProvider for Pallet<T>

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fn ongoing() -> bool

Indicate if this election provider is currently ongoing an asynchronous election or not.
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fn elect() -> Result<BoundedSupportsOf<Self>, Self::Error>

Performs the election. This should be implemented as a self-weighing function. The implementor should register its appropriate weight at the end of execution with the system pallet directly.
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impl<T: Config> ElectionProviderBase for Pallet<T>

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type AccountId = <T as Config>::AccountId

The account identifier type.
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type BlockNumber = <T as Config>::BlockNumber

The block number type.
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type Error = ElectionError<T>

The error type that is returned by the provider.
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type MaxWinners = <T as Config>::MaxWinners

The upper bound on election winners that can be returned. Read more
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type DataProvider = <T as Config>::DataProvider

The data provider of the election.
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fn desired_targets_checked() -> Result<u32, &'static str>

checked call to Self::DataProvider::desired_targets() ensuring the value never exceeds Self::MaxWinners.
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impl<T: Config> GetStorageVersion for Pallet<T>

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fn current_storage_version() -> StorageVersion

Returns the current storage version as supported by the pallet.
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fn on_chain_storage_version() -> StorageVersion

Returns the on-chain storage version of the pallet as stored in the storage.
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impl<T: Config> Hooks<<T as Config>::BlockNumber> for Pallet<T>

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fn on_initialize(now: T::BlockNumber) -> Weight

The block is being initialized. Implement to have something happen. Read more
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fn offchain_worker(now: T::BlockNumber)

Implementing this function on a module allows you to perform long-running tasks that make (by default) validators generate transactions that feed results of those long-running computations back on chain. Read more
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fn integrity_test()

Run integrity test. Read more
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fn on_finalize(_n: BlockNumber)

The block is being finalized. Implement to have something happen.
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fn on_idle(_n: BlockNumber, _remaining_weight: Weight) -> Weight

This will be run when the block is being finalized (before on_finalize). Implement to have something happen using the remaining weight. Will not fire if the remaining weight is 0. Return the weight used, the hook will subtract it from current weight used and pass the result to the next on_idle hook if it exists.
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fn on_runtime_upgrade() -> Weight

Perform a module upgrade. Read more
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impl<T: Config> IntegrityTest for Pallet<T>

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fn integrity_test()

Run integrity test. Read more
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impl<T: Config> OffchainWorker<<T as Config>::BlockNumber> for Pallet<T>

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fn offchain_worker(n: <T as Config>::BlockNumber)

This function is being called after every block import (when fully synced). Read more
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impl<T: Config> OnFinalize<<T as Config>::BlockNumber> for Pallet<T>

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fn on_finalize(n: <T as Config>::BlockNumber)

The block is being finalized. Implement to have something happen. Read more
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impl<T: Config> OnGenesis for Pallet<T>

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fn on_genesis()

Something that should happen at genesis.
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impl<T: Config> OnIdle<<T as Config>::BlockNumber> for Pallet<T>

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fn on_idle(n: <T as Config>::BlockNumber, remaining_weight: Weight) -> Weight

The block is being finalized. Implement to have something happen in case there is leftover weight. Check the passed remaining_weight to make sure it is high enough to allow for your pallet’s extra computation. Read more
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impl<T: Config> OnInitialize<<T as Config>::BlockNumber> for Pallet<T>

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fn on_initialize(n: <T as Config>::BlockNumber) -> Weight

The block is being initialized. Implement to have something happen. Read more
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impl<T: Config> OnRuntimeUpgrade for Pallet<T>

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fn on_runtime_upgrade() -> Weight

Perform a module upgrade. Read more
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impl<T: Config> PalletInfoAccess for Pallet<T>

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fn index() -> usize

Index of the pallet as configured in the runtime.
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fn name() -> &'static str

Name of the pallet as configured in the runtime.
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fn module_name() -> &'static str

Name of the Rust module containing the pallet.
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fn crate_version() -> CrateVersion

Version of the crate containing the pallet.
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impl<T: Config> PalletsInfoAccess for Pallet<T>

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fn count() -> usize

The number of pallets’ information that this type represents. Read more
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fn infos() -> Vec<PalletInfoData>

All of the pallets’ information that this type represents.
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impl<T> PartialEq<Pallet<T>> for Pallet<T>

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fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<T: Config> StorageInfoTrait for Pallet<T>

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impl<T: Config> ValidateUnsigned for Pallet<T>

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type Call = Call<T>

The call to validate
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fn validate_unsigned( source: TransactionSource, call: &Self::Call ) -> TransactionValidity

Return the validity of the call Read more
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fn pre_dispatch(call: &Self::Call) -> Result<(), TransactionValidityError>

Validate the call right before dispatch. Read more
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impl<T: Config> WhitelistedStorageKeys for Pallet<T>

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fn whitelisted_storage_keys() -> Vec<TrackedStorageKey>

Returns a Vec<TrackedStorageKey> indicating the storage keys that should be whitelisted during benchmarking. This means that those keys will be excluded from the benchmarking performance calculation.
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impl<T> Eq for Pallet<T>

Auto Trait Implementations§

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impl<T> RefUnwindSafe for Pallet<T>where T: RefUnwindSafe,

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impl<T> Send for Pallet<T>where T: Send,

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impl<T> Sync for Pallet<T>where T: Sync,

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impl<T> Unpin for Pallet<T>where T: Unpin,

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impl<T> UnwindSafe for Pallet<T>where T: UnwindSafe,

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CheckedConversion for T

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fn checked_from<T>(t: T) -> Option<Self>where Self: TryFrom<T>,

Convert from a value of T into an equivalent instance of Option<Self>. Read more
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fn checked_into<T>(self) -> Option<T>where Self: TryInto<T>,

Consume self to return Some equivalent value of Option<T>. Read more
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impl<T> Conv for T

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fn conv<T>(self) -> Twhere Self: Into<T>,

Converts self into T using Into<T>. Read more
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fn into_any(self: Box<T, Global>) -> Box<dyn Any, Global>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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fn __clone_box(&self, _: Private) -> *mut ()

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impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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fn fmt_binary(self) -> FmtBinary<Self>where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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Causes self to use its Display implementation when Debug-formatted.
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Causes self to use its LowerExp implementation when Debug-formatted.
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Causes self to use its LowerHex implementation when Debug-formatted.
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Causes self to use its Octal implementation when Debug-formatted.
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Causes self to use its UpperExp implementation when Debug-formatted.
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Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>where &'a Self: for<'a> IntoIterator,

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fn from(t: T) -> T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn from_ref(t: &T) -> &T

Cast reference.
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Cast reference.
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Cast mutable reference.
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Cast mutable reference.
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fn from_ref(outer: &Outer) -> &T

Get a reference to the inner from the outer.

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fn from_mut(outer: &mut Outer) -> &mut T

Get a mutable reference to the inner from the outer.

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impl<T> PalletVersionToStorageVersionHelper for Twhere T: GetStorageVersion + PalletInfoAccess,

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impl<T> Pipe for Twhere T: ?Sized,

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> Rwhere Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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Borrows self and passes that borrow into the pipe function. Read more
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Mutably borrows self and passes that borrow into the pipe function. Read more
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fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> Rwhere Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> Rwhere Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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Borrows self, then passes self.deref() into the pipe function.
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impl<T> Pointable for T

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const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.
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type Init = T

The type for initializers.
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Initializes a with the given initializer. Read more
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The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<S, T> UncheckedInto<T> for Swhere T: UncheckedFrom<S>,

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fn unchecked_into(self) -> T

The counterpart to unchecked_from.
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impl<T, S> UniqueSaturatedInto<T> for Swhere T: Bounded, S: TryInto<T>,

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fn unique_saturated_into(self) -> T

Consume self to return an equivalent value of T.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> MaybeDebug for Twhere T: Debug,

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impl<T> MaybeDebug for Twhere T: Debug,

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impl<T> MaybeRefUnwindSafe for Twhere T: RefUnwindSafe,

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impl<T> Member for Twhere T: Send + Sync + Debug + Eq + PartialEq<T> + Clone + 'static,