Artur Chmaro I vlayer Workshop I ETHGlobal Prague 2025

Thu, Oct 2, 2025, 12:00 AM

Artur Chmaro introduces Vlayer's revolutionary ZK-powered tools for Solidity developers at ETHGlobal Prague 2025. Discover four groundbreaking superpowers: Time Travel (historical state access), Teleport (cross-chain state verification), Web Proofs (private web data verification), and Email Proofs (on-chain email authentication). Learn how to implement these features using familiar Solidity and Foundry tooling, with live demos of Twitter handle verification and Revolut transaction proofs. Perfect for developers building identity solutions, RWA tokenization, or cross-chain applications needing verifiable off-chain data. 00:00 - Introduction to Vlayer's 4 Developer Superpowers 00:51 - Time Travel: Accessing Historical Blockchain State 01:27 - Web Proofs: Private Data Verification with ZK 02:02 - Vlayer's Dual Contract Model: Prover vs Verifier 03:15 - Demo: Reading Historical NFT Ownership Data 04:25 - On-Chain Verification with OnlyVerified Modifier 05:35 - Advanced Time Travel: Calculating Token Averages 06:49 - Supported Chains: Ethereum, Base, Optimism 07:25 - Web Proofs Deep Dive: Revolut & Twitter Examples 09:14 - Browser Extension Demo: TLS Session Notarization 11:07 - Starter Templates & Local Development Setup 12:23 - Live Twitter Handle Verification Demo 14:59 - Data Redaction in ZK Proofs 16:12 - Email Proofs: On-Chain Email Authentication 18:43 - Getting Started: Vlayer CLI & Documentation 21:09 - Q&A: Prover/Verifier Deployment Architecture 22:31 - Chain Compatibility Explained 24:02 - Notary Trust Model & Security Assumptions _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 🇨🇿 *ETHGlobal Prague* This workshop is specifically for ETHGlobal Prague, a 3-day hackathon held May 30 - June 1 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! Watch the full ETHGlobal Prague 2025 playlist here: https://youtube.com/playlist?list=PLXzKMXK2aHh5Vv-ZobDU2YMWekDFYvOqd&si=SoQ5O2TOAK8RkYf- _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ✅ *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 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _