Trait pallet_chainlink_feed::pallet::FeedInterface

pub trait FeedInterface<T: Config> {
    type Value: Parameter + BaseArithmetic;
    fn first_valid_round(&self) -> Option<RoundId>;
    fn latest_round(&self) -> RoundId;
    fn data_at(
        &self, 
        round: RoundId
    ) -> Option<RoundData<T::BlockNumber, Self::Value>>;
    fn latest_data(&self) -> RoundData<T::BlockNumber, Self::Value>;
    fn decimals(&self) -> u8;
}

Trait for read-only access to a feed.

Associated Types

type Value: Parameter + BaseArithmetic

Required methods

fn first_valid_round(&self) -> Option<RoundId>

Returns the id of the first round that contains non-default data.

Check this if you want to make sure that the data returned by latest_data is sensible.

fn latest_round(&self) -> RoundId

Returns the id of the latest oracle round.

fn data_at(
    &self,
    round: RoundId
) -> Option<RoundData<T::BlockNumber, Self::Value>>

Returns the data for a given round.

Will return None if there is no data for the given round.

fn latest_data(&self) -> RoundData<T::BlockNumber, Self::Value>

Returns the latest data for the feed.

Will always return data but may contain default data if there has not been a valid round, yet. Check first_valid_round to determine whether there is useful data, yet.

fn decimals(&self) -> u8

Represents the number of decimals with which the feed is configured

Implementors

impl<T: Config> FeedInterface<T> for Feed<T>

type Value = T::Value