Pulling the data you deserve
summary
Pull oracle delivers off‑chain prices by having users fetch a signed update from the Hermes endpoint and submit it on‑chain, rather than waiting for periodic pushes. Workflow: copy the constant price feed ID, request the price update via Hermes REST/SDK/WebSocket (or curl), hex‑prefix the payload, call the oracle’s payable updatePriceFeeds method (costs 1 wei per price), then read with getPrice (getPriceUnsafe skips the 60s freshness check). Pyth lists ~7K price feeds and ~3K entropy entries; entropy uses a commit‑reveal callback model.
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chapters (9)
- 0:00Workshop introduction
- 1:27P Oracle vs pull oracles
- 5:50P Oracle components
- 9:05Fetching price data
- 14:34P Oracle errors
- 18:43Random numbers with P
- 23:05Hackathon guidelines
- 24:29Q&A
- 30:00Closing
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