# Flare Workshop - Bring Any Web2 Data On Chain I Nik Erzetic

- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2025-10-09
- Duration: 26:00
- Topics: Flare, Flare Data Connector, FDC, Web2 data, on-chain, attestation, smart contracts, Hardhat, repository, API, JQ filter, Solidity struct, Merkle proof, validator, decentralized, weather insurance, DApp, verifier server, blockchain, developer hub, data provider, proof, data privacy, integration, starter project, guide, script, contract, workflow, data attestation, Star Wars API
- Watch: https://streameth.org/watch/yt-rEY5Y5J02Nk
- YouTube: https://www.youtube.com/watch?v=rEY5Y5J02Nk

## Description

Nik Erzetic’s Flare Workshop demonstrates how to bring any Web2 API data on-chain using the Flare Data Connector (FDC). The session covers the FDC workflow: creating attestation requests, using verifier servers, submitting requests to the FDC hub contract, validator data retrieval, JQ filtering, Solidity struct encoding, and Merkle proof verification.

Nik walks through the Flare Hardhat Starter repository, showing how to adapt example contracts and scripts for custom projects. He explains modifying URLs, JQ filters, and AI signatures for different data sources, and highlights a weather insurance DApp example. The Q&A addresses proof structure (not zk-proof, but Merkle-based), handling sensitive API keys (not private after attestation), and further resources on the Flare Developer Hub. The workshop emphasizes decentralized data attestation, smart contract integration, and practical steps for developers to connect Web2 data to the Flare blockchain.

00:00 Introduction  
01:14 Flare Developer Hub Overview  
01:43 FDC User Workflow Explained  
05:05 Flare Hardhat Starter Repository  
06:36 Example Contract and Script Walkthrough  
10:06 JQ Filter and Data Processing  
13:02 Solidity Struct (AI Signature) Explanation  
15:33 Modifying the Starter Project  
18:04 Q&A: Proof Structure  
20:07 Q&A: API Keys and Data Privacy  
21:11 Q&A: Weather Insurance Example  
24:59 Additional Resources and Closing

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🇫🇷 *ETHGlobal Cannes*
This workshop is specifically for ETHGlobal Cannes, a 3-day hackathon held July 4-6, 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 Cannes 2025 playlist here: https://youtube.com/playlist?list=PLXzKMXK2aHh5N2DCwhcEshNW9C8knZ1T-&si=Lc-WOyfkAVP2--R4

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Website: https://ethglobal.com
YouTube: https://www.youtube.com/c/ETHGlobal 

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_Are you interested in Ethereum development and entrepreneurship?_
👉 Sign up for the next ETHGlobal event: https://ethglobal.com/events
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