Struct polkadot_sdk_frame::traits::StorageVersion

pub struct StorageVersion(/* private fields */);

Expand description

The storage version of a pallet.

Each storage version of a pallet is stored in the state under a fixed key. See STORAGE_VERSION_STORAGE_KEY_POSTFIX for how this key is built.

Implementations§

impl StorageVersion

pub const fn new(version: u16) -> StorageVersion

Creates a new instance of Self.

pub fn storage_key<P>() -> [u8; 32]
where P: PalletInfoAccess,

Returns the storage key for a storage version.

See STORAGE_VERSION_STORAGE_KEY_POSTFIX on how this key is built.

pub fn put<P>(&self)
where P: PalletInfoAccess,

Put this storage version for the given pallet into the storage.

It will use the storage key that is associated with the given Pallet.

§Panics

This function will panic iff Pallet can not be found by PalletInfo. In a runtime that is put together using construct_runtime! this should never happen.

It will also panic if this function isn’t executed in an externalities provided environment.

pub fn get<P>() -> StorageVersion
where P: PalletInfoAccess,

Get the storage version of the given pallet from the storage.

It will use the storage key that is associated with the given Pallet.

§Panics

This function will panic iff Pallet can not be found by PalletInfo. In a runtime that is put together using construct_runtime! this should never happen.

It will also panic if this function isn’t executed in an externalities provided environment.

pub fn exists<P>() -> bool
where P: PalletInfoAccess,

Returns if the storage version key for the given pallet exists in storage.

See STORAGE_VERSION_STORAGE_KEY_POSTFIX on how this key is built.

§Panics

This function will panic iff Pallet can not be found by PalletInfo. In a runtime that is put together using construct_runtime! this should never happen.

It will also panic if this function isn’t executed in an externalities provided environment.

Trait Implementations§

impl Add<u16> for StorageVersion

type Output = StorageVersion

The resulting type after applying the + operator.

fn add(self, rhs: u16) -> <StorageVersion as Add<u16>>::Output

Performs the + operation. Read more

impl Clone for StorageVersion

fn clone(&self) -> StorageVersion

Returns a copy of the value. Read more

1.0.0 · source§

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

Performs copy-assignment from source. Read more

impl Debug for StorageVersion

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

Formats the value using the given formatter. Read more

impl Decode for StorageVersion

fn decode<CodecInputEdqy>( codec_input_edqy: &mut CodecInputEdqy, ) -> Result<StorageVersion, Error>
where CodecInputEdqy: Input,

Attempt to deserialise the value from input.

fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self>, ) -> Result<DecodeFinished, Error>
where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory. Read more

fn skip<I>(input: &mut I) -> Result<(), Error>
where I: Input,

Attempt to skip the encoded value from input. Read more

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type. Read more

impl Default for StorageVersion

fn default() -> StorageVersion

Returns the “default value” for a type. Read more

impl Encode for StorageVersion

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding. Read more

fn encode_to<CodecOutputEdqy>( &self, codec_dest_edqy: &mut CodecOutputEdqy, )
where CodecOutputEdqy: Output + ?Sized,

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8> ⓘ

Convert self to an owned vector.

fn using_encoded<CodecOutputReturn, CodecUsingEncodedCallback>( &self, f: CodecUsingEncodedCallback, ) -> CodecOutputReturn
where CodecUsingEncodedCallback: FnOnce(&[u8]) -> CodecOutputReturn,

Convert self to a slice and then invoke the given closure with it.

fn encoded_size(&self) -> usize

Calculates the encoded size. Read more

impl Ord for StorageVersion

fn cmp(&self, other: &StorageVersion) -> Ordering

This method returns an Ordering between self and other. Read more

1.21.0 · source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more

1.21.0 · source§

fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more

1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more

impl PartialEq<u16> for StorageVersion

fn eq(&self, other: &u16) -> bool

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

1.0.0 · source§

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 PartialEq for StorageVersion

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

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

1.0.0 · source§

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 PartialOrd<u16> for StorageVersion

fn partial_cmp(&self, other: &u16) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more

1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more

1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more

1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

impl PartialOrd for StorageVersion

fn partial_cmp(&self, other: &StorageVersion) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more

1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more

1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more

1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

impl<T> StoreInCodeStorageVersion<T> for StorageVersion
where T: GetStorageVersion<InCodeStorageVersion = StorageVersion> + PalletInfoAccess,

fn store_in_code_storage_version()

Write the in-code storage version on-chain.

impl Copy for StorageVersion

impl EncodeLike for StorageVersion

impl Eq for StorageVersion

impl StructuralPartialEq for StorageVersion

Auto Trait Implementations§

impl Freeze for StorageVersion

impl RefUnwindSafe for StorageVersion

impl Send for StorageVersion

impl Sync for StorageVersion

impl Unpin for StorageVersion

impl UnwindSafe for StorageVersion

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