Trait DoubleKeyMapping

pub trait DoubleKeyMapping {
    type Key1: Asm;
    type Key2: Asm;
    type Value: StorageValue;

    const STORAGE_SLOT: i32;

    // Required method
    fn storage_key(key1: Self::Key1, key2: Self::Key2) -> [u8; 32];

    // Provided methods
    fn get(key1: Self::Key1, key2: Self::Key2) -> Self::Value { ... }
    fn set(key1: Self::Key1, key2: Self::Key2, value: Self::Value) { ... }
}

Storage mapping interface

Required Associated Constants

const STORAGE_SLOT: i32

Required Associated Types

type Key1: Asm

type Key2: Asm

type Value: StorageValue

Required Methods

fn storage_key(key1: Self::Key1, key2: Self::Key2) -> [u8; 32]

Provided Methods

fn get(key1: Self::Key1, key2: Self::Key2) -> Self::Value

Get value from storage key.

fn set(key1: Self::Key1, key2: Self::Key2, value: Self::Value)

Set key and value

Object Safety

This trait is not object safe.

Implementors