Polynomial perp is a decentralised derivative exchange which uses Chainlink & Pyth , which is used to provide the up-to-date token price data to smart contracts on Ethereum and Optimism Mainnet.
For more details, check the synthetix doc
Oracle
The oracle is responsible for collecting and updating all token prices known to the Synthetix system. Although it is not a contract, it controls a known Ethereum address from which price updates are sent to the ExchangeRates contract.
ExchangeRates
The Synthetix exchange rates contract which receives token prices from the oracle, and supplies them to all contracts that need it.
