Trait pallet_example_offchain_worker::pallet::Config

pub trait Config: CreateSignedTransaction<Call<Self>> + Config {
    type AuthorityId: AppCrypto<Self::Public, Self::Signature>;
    type RuntimeEvent: From<Event<Self>> + IsType<<Self as Config>::RuntimeEvent>;
    type GracePeriod: Get<BlockNumberFor<Self>>;
    type UnsignedInterval: Get<BlockNumberFor<Self>>;
    type UnsignedPriority: Get<TransactionPriority>;
    type MaxPrices: Get<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. This pallet’s configuration trait

Required Associated Types

type AuthorityId: AppCrypto<Self::Public, Self::Signature>

The identifier type for an offchain worker.

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

The overarching event type.

type GracePeriod: Get<BlockNumberFor<Self>>

A grace period after we send transaction.

To avoid sending too many transactions, we only attempt to send one every GRACE_PERIOD blocks. We use Local Storage to coordinate sending between distinct runs of this offchain worker.

type UnsignedInterval: Get<BlockNumberFor<Self>>

Number of blocks of cooldown after unsigned transaction is included.

This ensures that we only accept unsigned transactions once, every UnsignedInterval blocks.

type UnsignedPriority: Get<TransactionPriority>

A configuration for base priority of unsigned transactions.

This is exposed so that it can be tuned for particular runtime, when multiple pallets send unsigned transactions.

type MaxPrices: Get<u32>

Maximum number of prices.

Implementors