Trait ink_storage_traits::Storable

pub trait Storable: Sized {
    // Required methods
    fn encode<T: Output + ?Sized>(&self, dest: &mut T);
    fn decode<I: Input>(input: &mut I) -> Result<Self, Error>;
    fn encoded_size(&self) -> usize;
}

Trait for representing types which can be read and written to storage.

This trait is not the same as the [scale::Codec]. Each type that implements [scale::Codec] are storable by default and transferable between contracts. But not each storable type is transferable.

Required Methods

fn encode<T: Output + ?Sized>(&self, dest: &mut T)

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

fn decode<I: Input>(input: &mut I) -> Result<Self, Error>

Attempt to deserialize the value from input.

fn encoded_size(&self) -> usize

The exact number of bytes this type consumes in the encoded form.

Object Safety

This trait is not object safe.

Implementors

impl<P> Storable for P

where P: Codec,

Types which implement scale::Encode and scale::Decode are Storable by default because they can be written directly into the storage cell.