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About Pyth
Pyth delivers market data published first-party by exchanges, market makers and banks. On Stellar it uses a pull model: an application obtains signed price updates off chain and verifies them on chain through Pyth's verifier contract, which Pyth's docs list for Stellar Mainnet and Stellar Testnet; receiving the feeds requires a Pyth Pro subscription. Prices are verified per call rather than written to an on-chain feed, so feed freshness is not observable on chain.
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