# Nik Erzetic I Flare Workshop, Bring Any Web2 Data On Chain I ETHGlobal Prague 2025

- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2025-10-09
- Duration: 24:30
- Topics: Flare Network, data oracles, Web2 to Web3, FDC protocol, API integration, JSON filtering, JQ transformations, attestation requests, Merkle proofs, validator consensus, smart contract data, Hardhat starter kit, verifier server, on-chain proofs, data provenance, Star Wars API, Solidity structs, encoding schemes, decentralized validation, data connectors, trustless bridging, developer tools, ETHGlobal, blockchain middleware, real-world data
- Watch: https://streameth.org/watch/yt-XEqQRiw04Iw
- YouTube: https://www.youtube.com/watch?v=XEqQRiw04Iw

## Description

Nik Erzetic demonstrates how to bring any Web2 data on-chain using Flare's enshrined oracles in this ETHGlobal Prague 2025 workshop. Learn the complete workflow from API data extraction (shown with a Star Wars API example) to on-chain verification, including JQ filtering, attestation requests, and Merkle proof validation.

Discover how Flare's Data Connector (FDC) protocol enables trustless data bridging for smart contracts, with practical examples from the Flare Hardhat Starter repository. Essential for developers building data-driven dApps or needing reliable off-chain data in their blockchain applications.

00:00 - Introduction to Flare's Data Oracle Capabilities
00:58 - Flare Developer Hub Resources & Hardhat Starter Kit
02:52 - Star Wars API Demo: Querying Character Data
03:53 - JQ Playground: Filtering & Transforming JSON Data
07:06 - Solidity Struct Encoding for On-Chain Storage
10:02 - Flare Data Connector Protocol Workflow Explained
12:42 - Live Script Demo: From API Call to On-Chain Proof
14:29 - Verifier Server Response & Request Encoding
15:25 - Validator Consensus & Proof Finalization
17:27 - Decoding On-Chain Data (R2-D2 Example)
18:09 - Q&A: Website Integration & Private API Handling
21:12 - Data Provenance Verification Methods
23:09 - Latency Discussion: Request to Finalization Time

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🇨🇿 *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-

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Website: https://ethglobal.com
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