Struct PriceFeed

pub struct PriceFeed(/* private fields */);

Methods from Deref<Target = PriceFeed>

pub fn get_price_unchecked(&self) -> Price

Get the “unchecked” price and confidence interval as fixed-point numbers of the form a * 10^e along with its publish time.

Returns a Price struct containing the current price, confidence interval, and the exponent for both numbers, and publish time. This method returns the latest price which may be from arbitrarily far in the past, and the caller should probably check the timestamp before using it.

Please consider using get_price_no_older_than when possible.

pub fn get_ema_price_unchecked(&self) -> Price

Get the “unchecked” exponentially-weighted moving average (EMA) price and a confidence interval on the result along with its publish time.

Returns the latest EMA price value which may be from arbitrarily far in the past, and the caller should probably check the timestamp before using it.

At the moment, the confidence interval returned by this method is computed in a somewhat questionable way, so we do not recommend using it for high-value applications.

Please consider using get_ema_price_no_older_than when possible.

pub fn get_price_no_older_than( &self, current_time: i64, age: u64, ) -> Option<Price>

Get the price as long as it was updated within age seconds of the current_time.

This function is a sanity-checked version of get_price_unchecked which is useful in applications that require a sufficiently-recent price. Returns None if the price wasn’t updated sufficiently recently.

Returns a struct containing the latest available price, confidence interval and the exponent for both numbers, or None if no price update occurred within age seconds of the current_time.

pub fn get_ema_price_no_older_than( &self, current_time: i64, age: u64, ) -> Option<Price>

Get the exponentially-weighted moving average (EMA) price as long as it was updated within age seconds of the current_time.

This function is a sanity-checked version of get_ema_price_unchecked which is useful in applications that require a sufficiently-recent price. Returns None if the price wasn’t updated sufficiently recently.

Returns a struct containing the EMA price, confidence interval and the exponent for both numbers, or None if no price update occurred within age seconds of the current_time.

Trait Implementations

impl AccountDeserialize for PriceFeed

fn try_deserialize_unchecked(data: &mut &[u8]) -> Result<Self>

Deserializes account data without checking the account discriminator. This should only be used on account initialization, when the bytes of the account are zeroed.

fn try_deserialize(buf: &mut &[u8]) -> Result<Self, Error>

Deserializes previously initialized account data. Should fail for all uninitialized accounts, where the bytes are zeroed. Implementations should be unique to a particular account type so that one can never successfully deserialize the data of one account type into another. For example, if the SPL token program were to implement this trait, it should be impossible to deserialize a Mint account into a token Account.

impl AccountSerialize for PriceFeed

fn try_serialize<W: Write>(&self, _writer: &mut W) -> Result<(), Error>

Serializes the account data into writer.

impl Clone for PriceFeed

fn clone(&self) -> PriceFeed

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Deref for PriceFeed

type Target = PriceFeed

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Owner for PriceFeed

fn owner() -> Pubkey