English versionEN

Querying Blockchain Data with GraphQL

Please sign in to watch this workshop.

Curious about how data works in the world of blockchain? Join Simon in an engaging session about The Graph, the decentralized indexing protocol that makes it easy for blockchain developers to search and query blockchain data.

Table of the contents:

- Understanding blockchain data

- Anatomy of a smart contract

- Indexing blockchain data with The Graph

- Accessing data on The Graph

- Recommended subgraphs

- Writing subgraphs overview

This workshop has been presented at JSNation 2023, check out the latest edition of this JavaScript Conference.

FAQ

A blockchain is a decentralized and geographically distributed system where data, like transactions, is stored across thousands of independent validators. It's known for being tamper-proof due to its cryptographic security, making it a reliable database for transactions involving substantial value.

Ethereum differs from Bitcoin primarily through its support for smart contracts. Smart contracts on Ethereum can store data and set rules for modifying that data, enabling more complex applications like NFTs, unlike Bitcoin, which does not support smart contracts.

Smart contracts are programs stored on a blockchain that run when predetermined conditions are met. They automatically execute, control, or document legally relevant events and actions according to the terms of a contract or an agreement.

Ethereum validators are responsible for maintaining the blockchain's integrity. They verify and validate transactions and smart contracts, adding them to the Ethereum blockchain. This decentralized validation process helps ensure security and reliability of the data recorded on the blockchain.

NFTs (Non-Fungible Tokens) are unique digital assets verified using blockchain technology, representing ownership of specific items. They can be bought, sold, or traded. Interactions with NFTs, like transfers, are treated as transactions on the blockchain.

Challenges with blockchain data include the difficulty in accessing historical data, high storage requirements, and the lack of incentivization for data retrieval, which can lead to inefficiencies in accessing and utilizing stored data.

The Graph enhances blockchain data accessibility by providing a structured way of indexing and querying data using GraphQL. This abstraction allows developers to access the data they need without managing the lower-level details of blockchain interactions.

The Graph is a decentralized protocol for indexing and querying data from blockchains using GraphQL. It allows developers to efficiently and securely query blockchain data without having to deal with the complexity of directly interfacing with the blockchain.

Simon Emanuel Schmid

64 min

29 May, 2023

Comments

Available in other languages:

Watch more workshops on topic

Web3 Workshop - Building Your First Dapp

React Advanced 2021

145 min

Web3 Workshop - Building Your First Dapp

Top Content

Featured Workshop

Nader Dabit

In this workshop, you'll learn how to build your first full stack dapp on the Ethereum blockchain, reading and writing data to the network, and connecting a front end application to the contract you've deployed. By the end of the workshop, you'll understand how to set up a full stack development environment, run a local node, and interact with any smart contract using React, HardHat, and Ethers.js.

react web development ethereum blockchain web3

Build a Headless WordPress App with Next.js and WPGraphQL

React Summit 2022

173 min

Build a Headless WordPress App with Next.js and WPGraphQL

Top Content

Workshop

Kellen Mace

In this workshop, you’ll learn how to build a Next.js app that uses Apollo Client to fetch data from a headless WordPress backend and use it to render the pages of your app. You’ll learn when you should consider a headless WordPress architecture, how to turn a WordPress backend into a GraphQL server, how to compose queries using the GraphiQL IDE, how to colocate GraphQL fragments with your components, and more.

next.js graphql wordpress

Build with SvelteKit and GraphQL

GraphQL Galaxy 2021

140 min

Build with SvelteKit and GraphQL

Top Content

Workshop

Scott Spence

Have you ever thought about building something that doesn't require a lot of boilerplate with a tiny bundle size? In this workshop, Scott Spence will go from hello world to covering routing and using endpoints in SvelteKit. You'll set up a backend GraphQL API then use GraphQL queries with SvelteKit to display the GraphQL API data. You'll build a fast secure project that uses SvelteKit's features, then deploy it as a fully static site. This course is for the Svelte curious who haven't had extensive experience with SvelteKit and want a deeper understanding of how to use it in practical applications.

Table of contents:
- Kick-off and Svelte introduction
- Initialise frontend project
- Tour of the SvelteKit skeleton project
- Configure backend project
- Query Data with GraphQL
- Fetching data to the frontend with GraphQL
- Styling
- Svelte directives
- Routing in SvelteKit
- Endpoints in SvelteKit
- Deploying to Netlify
- Navigation
- Mutations in GraphCMS
- Sending GraphQL Mutations via SvelteKit
- Q&A

graphql svelte

Relational Database Modeling for GraphQL

GraphQL Galaxy 2020

106 min

Relational Database Modeling for GraphQL

Top Content

Workshop

Adron Hall

In this workshop we'll dig deeper into data modeling. We'll start with a discussion about various database types and how they map to GraphQL. Once that groundwork is laid out, the focus will shift to specific types of databases and how to build data models that work best for GraphQL within various scenarios.
Table of contentsPart 1 - Hour 1 a. Relational Database Data Modeling b. Comparing Relational and NoSQL Databases c. GraphQL with the Database in mindPart 2 - Hour 2 a. Designing Relational Data Models b. Relationship, Building MultijoinsTables c. GraphQL & Relational Data Modeling Query Complexities
Prerequisites a. Data modeling tool. The trainer will be using dbdiagram b. Postgres, albeit no need to install this locally, as I'll be using a Postgres Dicker image, from Docker Hub for all examples c. Hasura

graphql database

Build and Deploy a Backend With Fastify & Platformatic

JSNation 2023

104 min

Build and Deploy a Backend With Fastify & Platformatic

Top Content

Workshop

Matteo Collina

Platformatic allows you to rapidly develop GraphQL and REST APIs with minimal effort. The best part is that it also allows you to unleash the full potential of Node.js and Fastify whenever you need to. You can fully customise a Platformatic application by writing your own additional features and plugins. In the workshop, we’ll cover both our Open Source modules and our Cloud offering:- Platformatic OSS (open-source software) — Tools and libraries for rapidly building robust applications with Node.js (https://oss.platformatic.dev/).- Platformatic Cloud (currently in beta) — Our hosting platform that includes features such as preview apps, built-in metrics and integration with your Git flow (https://platformatic.dev/).
In this workshop you'll learn how to develop APIs with Fastify and deploy them to the Platformatic Cloud.

node.js graphql cloud fastify

Building GraphQL APIs on top of Ethereum with The Graph

GraphQL Galaxy 2021

48 min

Building GraphQL APIs on top of Ethereum with The Graph

Workshop

Nader Dabit

The Graph is an indexing protocol for querying networks like Ethereum, IPFS, and other blockchains. Anyone can build and publish open APIs, called subgraphs, making data easily accessible.

In this workshop you’ll learn how to build a subgraph that indexes NFT blockchain data from the Foundation smart contract. We’ll deploy the API, and learn how to perform queries to retrieve data using various types of data access patterns, implementing filters and sorting.

By the end of the workshop, you should understand how to build and deploy performant APIs to The Graph to index data from any smart contract deployed to Ethereum.

graphql ethereum api development

Check out more articles and videos

We constantly think of articles and videos that might spark Git people interest / skill us up or help building a stellar career

From GraphQL Zero to GraphQL Hero with RedwoodJS

GraphQL Galaxy 2021

32 min

From GraphQL Zero to GraphQL Hero with RedwoodJS

Top Content

Tom Preston-Werner

GitHub cofounder, RedwoodJS author

Tom Pressenwurter introduces Redwood.js, a full stack app framework for building GraphQL APIs easily and maintainably. He demonstrates a Redwood.js application with a React-based front end and a Node.js API. Redwood.js offers a simplified folder structure and schema for organizing the application. It provides easy data manipulation and CRUD operations through GraphQL functions. Redwood.js allows for easy implementation of new queries and directives, including authentication and limiting access to data. It is a stable and production-ready framework that integrates well with other front-end technologies.

graphql builders and founders redwoodjs frameworks

Local State and Server Cache: Finding a Balance

Vue.js London Live 2021

24 min

Local State and Server Cache: Finding a Balance

Top Content

Natalia Tepluhina

GitLab

This Talk discusses handling local state in software development, particularly when dealing with asynchronous behavior and API requests. It explores the challenges of managing global state and the need for actions when handling server data. The Talk also highlights the issue of fetching data not in Vuex and the challenges of keeping data up-to-date in Vuex. It mentions alternative tools like Apollo Client and React Query for handling local state. The Talk concludes with a discussion on GitLab going public and the celebration that followed.

vue graphql server cache

Batteries Included Reimagined - The Revival of GraphQL Yoga

GraphQL Galaxy 2021

33 min

Batteries Included Reimagined - The Revival of GraphQL Yoga

Uri Goldshtein

Founder of The Guild, the largest open source group in GraphQL ecosystem.

Envelope is a powerful GraphQL plugin system that simplifies server development and allows for powerful plugin integration. It provides conformity for large corporations with multiple GraphQL servers and can be used with various frameworks. Envelope acts as the Babel of GraphQL, allowing the use of non-spec features. The Guild offers GraphQL Hive, a service similar to Apollo Studio, and encourages collaboration with other frameworks and languages.

react server components graphql

Rock Solid React and GraphQL Apps for People in a Hurry

GraphQL Galaxy 2022

29 min

Rock Solid React and GraphQL Apps for People in a Hurry

Ryan Chenkie

Founder @ CourseLift

The Talk discusses the challenges and advancements in using GraphQL and React together. It introduces RedwoodJS, a framework that simplifies frontend-backend integration and provides features like code generation, scaffolding, and authentication. The Talk demonstrates how to set up a Redwood project, generate layouts and models, and perform CRUD operations. Redwood automates many GraphQL parts and provides an easy way for developers to get started with GraphQL. It also highlights the benefits of Redwood and suggests checking out RedwoodJS.com for more information.

react graphql

Web 3 Gaming: What it is and Why it Matters

JS GameDev Summit 2022

36 min

Web 3 Gaming: What it is and Why it Matters

Paul Gadi

CTO & Co-founder of OPGames

Web3 gaming enables decentralized identity and finance, allowing game developers to bypass centralized platforms. It is driven by wallets, ERC20 tokens, and NFTs. Web3 games focus on collaborative world-building, ownership, and open-source collaboration. The challenge is achieving decentralization while addressing economic and technological limitations. Web3 aims to redefine the gaming industry by using economic tools and exploring new genres like RPG and RTS games.

game development blockchain web3

Adopting GraphQL in an Enterprise

GraphQL Galaxy 2021

32 min

Adopting GraphQL in an Enterprise

Shruti Kapoor

Lead Front End Engineer @ Slack

Today's Talk is about adopting GraphQL in an enterprise. It discusses the challenges of using REST APIs and the benefits of GraphQL. The Talk explores different approaches to adopting GraphQL, including coexistence with REST APIs. It emphasizes the power of GraphQL and provides tips for successful adoption. Overall, the Talk highlights the advantages of GraphQL in terms of efficiency, collaboration, and control over APIs.

graphql enterprise