# Intro to Building on The Graph and Hypergraph I Marcus Rein

- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2025-10-09
- Duration: 26:12
- Topics: The Graph, Hypergraph, Edge & Node, ETH Global, decentralized indexing, querying protocol, blockchain data, knowledge graph, hackathon, prizes, GRC20TS, local-first, full-stack, Web3, composable data, privacy, public spaces, private spaces, end-to-end encryption, standardized IDs, sync server, CRUD, schema, mapping, authentication, IPFS, DAO, DApp, Substreams, Subgraphs, SDK, composability, governance, real-time collaboration, data verifiability, smart contracts
- Watch: https://streameth.org/watch/yt-gcZQYFrzOI4
- YouTube: https://www.youtube.com/watch?v=gcZQYFrzOI4

## Description

Marcus Rein, Senior Developer Relations at Edge & Node, introduces building on The Graph and Hypergraph at ETH Global. The Graph is a decentralized indexing and querying protocol for blockchain data, featuring 100+ indexers. He outlines $10,000 in hackathon prizes across tracks for building with Token API, Substreams, Subgraphs, Hypergraph, and the GRC20TS library. Hypergraph is a local-first, full-stack Web3 app framework leveraging knowledge graphs for composable, privacy-enabled data.

Key features include public/private spaces, end-to-end encryption, standardized IDs, and real-time sync via a sync server. Marcus demos CRUD operations on entities in Hypergraph, showing schema definition, mapping, and front-end integration. He explains how Hypergraph enables collaborative, composable apps with both blockchain and non-financial data, and answers questions on privacy, authentication, data sync, decentralization, and verifiability. He encourages participants to explore use cases like crypto directories, DApp registries, and DAO governance explorers.

00:00 Introduction  
00:34 Overview of The Graph and Prizes  
01:16 Prize Tracks and GRC20TS Library  
02:36 Hypergraph Overview and Features  
04:43 Knowledge Graphs Explained  
06:14 Spaces: Public and Private Data  
07:37 Sync Server and Composability  
08:31 Hypergraph Live Demo: Setup  
09:25 Exploring Public Spaces and Entities  
10:31 Schema, Mapping, and Data Integration  
13:49 Adding and Composing Data  
14:05 Creating and Publishing Entities  
15:20 Managing Private and Public Spaces  
16:37 CRUD Operations in Hypergraph  
17:52 Composable Apps and Use Cases  
18:27 Example Ideas and Docs  
19:10 Q&A: Privacy, Sync, and Authentication  
21:04 Smart Contracts, Permissions, and Data Storage  
22:25 Sync Server, Decentralization, and Verifiability  
24:25 Exploring Spaces and Datasets  
25:19 Censorship, IPFS, and Final Q&A

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🇺🇸 *ETHGlobal New York*
This workshop is specifically for ETHGlobal New York, a 3-day hackathon held August 15-17, 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 New York 2025 playlist here: https://www.youtube.com/playlist?list=PLXzKMXK2aHh4Xze0ZeSWCSGsw25clPpvZ

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✅ *Follow The Graph*
X: https://x.com/graphprotocol

✅ *Follow ETHGlobal*
X: https://x.com/ETHGlobal​
Warpcast: https://warpcast.com/ethglobal
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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