All About Pyth I Nidhi Singh

Sun, Nov 2, 2025, 12:00 AM

Nidhi Singh presents a detailed workshop on Pyth, explaining everything developers and hackathon participants need to know about integrating Pyth’s price feeds and entropy into their Web3 applications. She begins by comparing push-based vs. pull-based oracle models, describing how Pyth’s on-demand (pull) price feeds give developers control, ensuring accurate and up-to-date pricing while reducing gas inefficiency common in legacy oracle systems. She walks through the Solidity SDK, showing how to fetch price feed IDs, obtain contract addresses, and use Hermes, Pyth’s off-chain service, to retrieve and update prices on-chain. Nidhi emphasizes that for hackathon eligibility, developers must update prices on-chain using the pull mechanism rather than relying on cached or unsafe methods. In the second part, she introduces Pyth Entropy, a secure on-chain randomness protocol based on a commit-and-reveal cryptographic scheme. Developers learn how to request random numbers, handle callbacks in smart contracts, and debug using the Entropy Explorer. The session concludes with a look at Entropy v2, customizable gas limits, and developer resources including documentation, error codes, and community forums. 00:10 Introduction & disclaimer 00:37 Overview of Pyth tracks: Price Feeds & Entropy 01:06 How Pyth’s price feed architecture differs from other oracles 02:16 Push-based vs. Pull-based models explained 04:05 Pull-based on-demand pricing and Hermes integration 05:13 How to integrate Pyth price feeds 06:27 Getting price feed IDs and contract addresses 07:56 Supported chains and asset classes 09:03 Using Hermes via REST, SDK, or WebSockets 10:30 Updating vs. getting prices; avoiding stale data 11:44 Smart contract example: updatePrice → getPriceNoOlderThan 12:52 Unsafe methods and bounty disqualification warnings 13:45 Developer Q&A: integration types, off-chain eligibility, latency 17:12 Intro to Entropy — secure randomness for smart contracts 17:57 How commit-and-reveal randomness works 20:10 Advantages over VRF and permissionless access 21:21 Implementing Entropy in EVM contracts (request + callback) 23:15 Using the Entropy Explorer for debugging 24:23 Gas limits, Entropy v2, and requestV2 upgrades 25:42 Handling callback failures and retrying 26:37 Dev forum for support & Q&A 27:20 Workshop close and resource sharing _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 💻 ETHOnline 2025 This workshop is specifically for ETHOnline 2025, a 21-day hackathon held October 10 - 31, 2025, bringing together the most skilled web3 developers, designers and product builders from all around the globe for a weekend-long adventure to advance the Ethereum ecosystem! _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ✅ Follow Pyth Network X: https://x.com/PythNetwork ✅ Follow ETHGlobal X: https://x.com/ETHGlobal​ Warpcast: https://warpcast.com/ethglobal Website: https://ethglobal.com YouTube: https://www.youtube.com/c/ETHGlobal _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Are you interested in Ethereum development and entrepreneurship?_ 👉 Sign up for the next ETHGlobal event: https://ethglobal.com/events 🎁 Get exclusive access and perks with ETHGlobal Plus! https://ethglobal.com/plus 📣 Want us to throw an event in your city? Tell us where! https://ethglobal.com/city