Struct pallet_timestamp::pallet::Pallet

pub struct Pallet<T>(/* private fields */);

The Pallet struct, the main type that implements traits and standalone functions within the pallet.

Implementations

impl<T: Config> Pallet<T>

pub fn set(origin: OriginFor<T>, now: T::Moment) -> DispatchResult

Set the current time.

This call should be invoked exactly once per block. It will panic at the finalization phase, if this call hasn’t been invoked by that time.

The timestamp should be greater than the previous one by the amount specified by Config::MinimumPeriod.

The dispatch origin for this call must be None.

This dispatch class is Mandatory to ensure it gets executed in the block. Be aware that changing the complexity of this call could result exhausting the resources in a block to execute any other calls.

Complexity

• O(1) (Note that implementations of OnTimestampSet must also be O(1))
• 1 storage read and 1 storage mutation (codec O(1) because of DidUpdate::take in on_finalize)
• 1 event handler on_timestamp_set. Must be O(1).

impl<T: Config> Pallet<T>

pub fn now() -> T::Moment

An auto-generated getter for Now.

impl<T: Config> Pallet<T>

pub fn get() -> T::Moment

Get the current time for the current block.

NOTE: if this function is called prior to setting the timestamp, it will return the timestamp of the previous block.

pub fn set_timestamp(now: T::Moment)

Set the timestamp to something in particular. Only used for tests.

Trait Implementations

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

fn before_all_runtime_migrations() -> Weight

Something that should happen before runtime migrations are executed.

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

type RuntimeCall = Call<T>

impl<T> Clone for Pallet<T>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for Pallet<T>

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

Formats the value using the given formatter.

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

type CurrentStorageVersion = NoStorageVersionSet

This will be filled out by the pallet macro.

fn current_storage_version() -> Self::CurrentStorageVersion

Returns the current storage version as supported by the pallet.

fn on_chain_storage_version() -> StorageVersion

Returns the on-chain storage version of the pallet as stored in the storage.

impl<T: Config> Hooks<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

fn on_initialize(_n: BlockNumberFor<T>) -> Weight

A dummy on_initialize to return the amount of weight that on_finalize requires to execute.

fn on_finalize(_n: BlockNumberFor<T>)

At the end of block execution, the on_finalize hook checks that the timestamp was updated. Upon success, it removes the boolean value from storage. If the value resolves to false, the pallet will panic.

Complexity

• O(1)

fn on_idle(_n: BlockNumber, _remaining_weight: Weight) -> Weight

Hook to consume a block’s idle time. This will run when the block is being finalized (before Hooks::on_finalize).

fn on_runtime_upgrade() -> Weight

Hook executed when a code change (aka. a “runtime upgrade”) is detected by FRAME.

fn offchain_worker(_n: BlockNumber)

Implementing this function on a pallet allows you to perform long-running tasks that are dispatched as separate threads, and entirely independent of the main wasm runtime.

fn integrity_test()

Check the integrity of this pallet’s configuration.

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

fn integrity_test()

See Hooks::integrity_test.

impl<T: Config> OffchainWorker<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

fn offchain_worker(n: BlockNumberFor<T>)

This function is being called after every block import (when fully synced).

impl<T: Config> OnFinalize<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

fn on_finalize(n: BlockNumberFor<T>)

See Hooks::on_finalize.

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

fn on_genesis()

Something that should happen at genesis.

impl<T: Config> OnIdle<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

fn on_idle(n: BlockNumberFor<T>, remaining_weight: Weight) -> Weight

See Hooks::on_idle.

impl<T: Config> OnInitialize<<<<T as Config>::Block as HeaderProvider>::HeaderT as Header>::Number> for Pallet<T>

fn on_initialize(n: BlockNumberFor<T>) -> Weight

See Hooks::on_initialize.

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

fn on_runtime_upgrade() -> Weight

See Hooks::on_runtime_upgrade.

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

fn index() -> usize

Index of the pallet as configured in the runtime.

fn name() -> &'static str

Name of the pallet as configured in the runtime.

fn name_hash() -> [u8; 16]

Two128 hash of name.

fn module_name() -> &'static str

Name of the Rust module containing the pallet.

fn crate_version() -> CrateVersion

Version of the crate containing the pallet.

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

fn count() -> usize

The number of pallets’ information that this type represents.

fn infos() -> Vec<PalletInfoData>

All of the pallets’ information that this type represents.

impl<T> PartialEq for Pallet<T>

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

This method tests for self and other values to be equal, and is used by ==.

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.

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

To check the inherent is valid, we simply take the max value between the current timestamp and the current timestamp plus the Config::MinimumPeriod. We also check that the timestamp has not already been set in this block.

Errors:

• InherentError::TooFarInFuture: If the timestamp is larger than the current timestamp + minimum drift period.
• InherentError::TooEarly: If the timestamp is less than the current + minimum period.

type Call = Call<T>

The call type of the pallet.

type Error = InherentError

The error returned by check_inherent.

const INHERENT_IDENTIFIER: InherentIdentifier = INHERENT_IDENTIFIER

The inherent identifier used by this inherent.

fn create_inherent(data: &InherentData) -> Option<Self::Call>

Create an inherent out of the given InherentData.

fn check_inherent( call: &Self::Call, data: &InherentData ) -> Result<(), Self::Error>

Check whether the given inherent is valid. Checking the inherent is optional and can be omitted by using the default implementation.

fn is_inherent(call: &Self::Call) -> bool

Return whether the call is an inherent call.

fn is_inherent_required( _: &InherentData ) -> Result<Option<Self::Error>, Self::Error>

Determines whether this inherent is required in this block.

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

fn storage_info() -> Vec<StorageInfo>

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

type Moment = <T as Config>::Moment

A type that represents a unit of time.

fn now() -> Self::Moment

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

Before the timestamp inherent is applied, it returns the time of previous block.

On genesis the time returned is not valid.

fn now() -> Duration

Return duration since SystemTime::UNIX_EPOCH.

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

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.

impl<T> Eq for Pallet<T>