Struct sp_externalities::MultiRemovalResults

pub struct MultiRemovalResults {
    pub maybe_cursor: Option<Vec<u8>>,
    pub backend: u32,
    pub unique: u32,
    pub loops: u32,
}

Results concerning an operation to remove many keys.

Fields

maybe_cursor: Option<Vec<u8>>

A continuation cursor which, if Some must be provided to the subsequent removal call. If None then all removals are complete and no further calls are needed.

backend: u32

The number of items removed from the backend database.

unique: u32

The number of unique keys removed, taking into account both the backend and the overlay.

loops: u32

The number of iterations (each requiring a storage seek/read) which were done.

Implementations

impl MultiRemovalResults

pub fn deconstruct(self) -> (Option<Vec<u8>>, u32, u32, u32)

Deconstruct into the internal components.

Returns (maybe_cursor, backend, unique, loops).

Trait Implementations

impl Decode for MultiRemovalResults

fn decode<__CodecInputEdqy: Input>(
    __codec_input_edqy: &mut __CodecInputEdqy
) -> Result<Self, Error>

Attempt to deserialise the value from input.

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

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl Encode for MultiRemovalResults

fn encode_to<__CodecOutputEdqy: Output + ?Sized>(
    &self,
    __codec_dest_edqy: &mut __CodecOutputEdqy
)

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

fn size_hint(&self) -> usize

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

fn encode(&self) -> Vec<u8, Global>

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> Rwhere
    F: FnOnce(&[u8]) -> R,

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

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl EncodeLike<MultiRemovalResults> for MultiRemovalResults