Struct PriceUpdateV2

Source

pub struct PriceUpdateV2 {
    pub write_authority: PubkeyBytes,
    pub verification_level: VerificationLevel,
    pub price_message: PriceFeedMessage,
    pub posted_slot: u64,
}

Fields§

§write_authority: PubkeyBytes§verification_level: VerificationLevel§price_message: PriceFeedMessage§posted_slot: u64

Implementations§

Source §

impl PriceUpdateV2

Source

pub const LEN: usize = 134usize

Source

pub fn get_price_update_v2_from_bytes(v: &[u8]) -> PriceUpdateV2

Interpret a PriceUpdateV2 from a byte slice

If you have fetched a “Price Feed Account” on chain, you probably want to get the data with

let data = &ctx.accounts.price.try_borrow_data()?[..];

Skip the first 8 bytes (Anchor discriminator)

let message_bytes = &data[8..];

Source §

impl PriceUpdateV2

Source

pub fn get_price_unchecked( &self, feed_id: Option<&FeedId>, ) -> Result<Price, GetPriceError>

Get a Price from a PriceUpdateV2 account for a given FeedId.

§Warning

This function does not check :

How recent the price is
Whether the price update has been verified

It is therefore unsafe to use this function without any extra checks, as it allows for the possibility of using unverified or outdated price updates.

Source

pub fn get_price_no_older_than_with_custom_verification_level( &self, unix_timestamp: i64, maximum_age: u64, feed_id: Option<&FeedId>, verification_level: VerificationLevel, ) -> Result<Price, GetPriceError>

Get a Price from a PriceUpdateV2 account for a given FeedId no older than maximum_age with customizable verification level.

§Warning

Lowering the verification level from Full to Partial increases the risk of using a malicious price update. Please read the documentation for VerificationLevel for more information.

§Example

use pyth_solana_receiver_sdk::price_update::{get_feed_id_from_hex, VerificationLevel, PriceUpdateV2};
use anchor_lang::prelude::*;

const MAXIMUM_AGE : u64 = 30;
const FEED_ID: &str = "0xef0d8b6fda2ceba41da15d4095d1da392a0d2f8ed0c6c7bc0f4cfac8c280b56d"; // SOL/USD

#[derive(Accounts)]
#[instruction(amount_in_usd : u64)]
pub struct ReadPriceAccount<'info> {
    pub price_update: Account<'info, PriceUpdateV2>,
}

pub fn read_price_account(ctx : Context<ReadPriceAccount>) -> Result<()> {
    let price_update = &mut ctx.accounts.price_update;
    let price = price_update.get_price_no_older_than_with_custom_verification_level(&Clock::get()?.unix_timestamp, MAXIMUM_AGE, &get_feed_id_from_hex(FEED_ID)?, VerificationLevel::Partial{num_signatures: 5})?;
    Ok(())
}

Source

pub fn get_price_no_older_than( &self, unix_timestamp: i64, maximum_age: u64, feed_id: Option<&FeedId>, ) -> Result<Price, GetPriceError>

Get a Price from a PriceUpdateV2 account for a given FeedId no older than maximum_age with Full verification.

§Example

use pyth_solana_receiver_sdk::price_update::{get_feed_id_from_hex, PriceUpdateV2};
use anchor_lang::prelude::*;

const MAXIMUM_AGE : u64 = 30;
const FEED_ID: &str = "0xef0d8b6fda2ceba41da15d4095d1da392a0d2f8ed0c6c7bc0f4cfac8c280b56d"; // SOL/USD

#[derive(Accounts)]
#[instruction(amount_in_usd : u64)]
pub struct ReadPriceAccount<'info> {
    pub price_update: Account<'info, PriceUpdateV2>,
}

pub fn read_price_account(ctx : Context<ReadPriceAccount>) -> Result<()> {
    let price_update = &mut ctx.accounts.price_update;
    let price = price_update.get_price_no_older_than(&Clock::get()?.unix_timestamp, MAXIMUM_AGE, &get_feed_id_from_hex(FEED_ID)?)?;
    Ok(())
}