Trait polkadot_sdk_docs::polkadot_sdk::frame_runtime::pallet::Config

pub trait Config: Config {
    type RuntimeEvent: IsType<<Self as Config>::RuntimeEvent> + From<Event<Self>>;
    type ValueParameter: Get<u32>;

    const ANOTHER_VALUE_PARAMETER: u32;
}

Configuration trait of this pallet.

The main purpose of this trait is to act as an interface between this pallet and the runtime in which it is embedded in. A type, function, or constant in this trait is essentially left to be configured by the runtime that includes this pallet.

Consequently, a runtime that wants to include this pallet must implement this trait. The configuration trait of a pallet. Mandatory. Allows a pallet to receive types at a later point from the runtime that wishes to contain it. It allows the pallet to be parameterized over both types and values.

Required Associated Types

type RuntimeEvent: IsType<<Self as Config>::RuntimeEvent> + From<Event<Self>>

A type that is not known now, but the runtime that will contain this pallet will know it later, therefore we define it here as an associated type.

type ValueParameter: Get<u32>

A parameterize-able value that we receive later via the Get<_> trait.

Required Associated Constants

const ANOTHER_VALUE_PARAMETER: u32

Similar to Config::ValueParameter, but using const. Both are functionally equal, but offer different tradeoffs.

Object Safety

This trait is not object safe.

Implementors

impl Config for Runtime

type RuntimeEvent = RuntimeEvent

type ValueParameter = ConstU32<42>

const ANOTHER_VALUE_PARAMETER: u32 = 42u32