Pyth is building a way to deliver a decentralized, cross-chain market of verifiable data from high-quality nodes to any smart contract, anywhere.
This library reads on-chain Pyth data from @solana/web3.js and returns JavaScript-friendly objects.
See our examples repo for real-world usage examples.
$ npm install --save @pythnetwork/client
$ yarn add @pythnetwork/client
This library provides a subscription model for consuming all price updates:
import { Connection, PublicKey } from '@solana/web3.js'
import { parseMappingData, parsePriceData, parseProductData } from '@pythnetwork/client'
import { getPythProgramKeyForCluster } from '@pythnetwork/client'
const connection = new Connection(SOLANA_CLUSTER_URL)
const pythPublicKey = getPythProgramKeyForCluster(CLUSTER)
const pythConnection = new PythConnection(connection, pythPublicKey)
pythConnection.onPriceChange((product, price) => {
// sample output:
// SRM/USD: $8.68725 ±$0.0131
console.log(`${product.symbol}: $${price.price} \xB1$${price.confidence}`)
})
pythConnection.start()You may also register to specific account updates using connection.onAccountChange in the solana web3 API, then
use the methods in index.ts to parse the on-chain data structures into Javascript-friendly objects.