#blockchain

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Blockchain is a distributed ledger technology that uses cryptography to store data securely and immutably across a network of computers. It is a digital ledger of records, called blocks, which are linked together using cryptographic principles. Each block contains a timestamp and a link to the previous block, forming an immutable chain. This makes it virtually impossible to tamper with the data stored in the blockchain, as any changes would be easily detected by the network. In the context of JavaScript, blockchain can be used to create distributed applications (dApps) which are secure, transparent, and decentralized.
Web 3 Gaming: What it is and Why it Matters
JS GameDev Summit 2022JS GameDev Summit 2022
36 min
Web 3 Gaming: What it is and Why it Matters
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.
Web3 Workshop - Building Your First Dapp
React Advanced 2021React Advanced 2021
145 min
Web3 Workshop - Building Your First Dapp
Top Content
Featured WorkshopFree
Nader Dabit
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.
Building a Decentralized Web With Web5
JSNation 2024JSNation 2024
13 min
Building a Decentralized Web With Web5
Today's Talk introduces Web5, which combines the best of Web 2 and Web 3 to build a decentralized web. Web5 consists of three pillars: decentralized identifiers, verifiable credentials, and decentralized applications. Verifiable credentials are used on platforms like LinkedIn, while decentralized web nodes act as data stores for web apps. Web5 allows users to own their data, reduces friction in onboarding, and enables example applications like Universal Music Playlist and Connected Travel. Building for Web5 presents challenges such as key management and data usage, but there are resources available to learn more about the technologies.
Unlocking Digital Ownership: How to Store Accounts Using Blockchain Technology
JSNation 2024JSNation 2024
30 min
Unlocking Digital Ownership: How to Store Accounts Using Blockchain Technology
Welcome to the talk about digital ownership using blockchain and NFTs. Explore NFTs and their integration with blockchain. Learn how to create NFTs using Remix on the Sepoia test network. Deploy and access the smart contract on the blockchain. Connect your wallet and grant access to NFTs. Understand the blockchain structure and its authentication capabilities. Connect your wallet with the frontend and interact with it. Explore blockchain connections with Chainlink. Understand gas fees and account abstraction in blockchain transactions. Learn about ownership, account recovery, and data storage on the blockchain. Discover how blockchain can be used for public information, databases, and its energy costs. Gain insights into blockchain functionality and data storage.
Querying Blockchain Data with GraphQL
JSNation 2023JSNation 2023
64 min
Querying Blockchain Data with GraphQL
WorkshopFree
Simon Emanuel Schmid
Simon Emanuel Schmid
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
Build Web3 apps with Javascript
JSNation 2022JSNation 2022
49 min
Build Web3 apps with Javascript
WorkshopFree
Shain Dholakiya
Shain Dholakiya
The workshop is designed to help Web2 developers start building for Web3 using the Hyperverse. The Hyperverse is an open marketplace of community-built, audited, easy to discover smart modules. Our goal - to make it easy for JavaScript developers to build Web3 apps without writing a single line of smart contract code. Think “npm for smart contracts.”Learn more about the Hyperverse here.We will go over all the blockchain/crypto basics you need to know to start building on the Hyperverse, so you do not need to have any previous knowledge about the Web3 space. You just need to have JavaScript experience.
How to Build UI's for Smart Contracts
React Summit 2022React Summit 2022
134 min
How to Build UI's for Smart Contracts
Workshop
Rahat Chowdhury
Rahat Chowdhury
There are many journeys we can take into becoming a web3 developer. Not all journeys require learning a completely new language and becoming a smart contract developer. In this workshop we will learn how to build our own React UI on top of any existing smart contracts on the Polygon Proof of Stake Blockchain. We will explore a basic overview of blockchains and learn about the advantages of building on Polygon. We will also gain an understanding of what Smart Contracts are, learn how to find existing ones, and learn tools that help us interact with them from a React application.
Build Blockchain dApps using JavaScript
JSNation 2022JSNation 2022
21 min
Build Blockchain dApps using JavaScript
Hello, my name is Russ Fustino, and welcome to Build Blockchain DApps Using JavaScript. We'll cover Algorand blockchain, layer one, setup your development environment, creating a simple DApp, verification, and UI controls from pipeline. Blockchain tools are now accessible to anyone for creating liquidity pooling, staking, and more. The Italian Society of Authors and Publishers is using NFTs on the Algorand blockchain to identify copyrights. Algorand accounts, ASAs, Atomic Transactions, Algorand Smart Contracts, and reporting with Indexer are part of the solution. Creating NFTs can be done using visual tools like Algodesk.io and wallets like Algosigner and MyAlgoWallet. Algorand atomic transfers guarantee the exchange of goods and facilitate decentralized applications. Smart signatures approve spending transactions and smart contracts facilitate global and local storage. DApp architecture includes a UI front end, payment transactions between accounts, asset transactions for NFTs and Fungible Tokens, and application calls for smart contracts. Various SDKs and tools are available, such as AlgoDesk.io, Algorand Studio, and Algodia. Reach is a high-level language and compiler for deploying DApps to the blockchain. Verification and audits play a crucial role in preventing locked away tokens. The Pipeline UI offers controls and components for easy integration into solutions.
Building GraphQL APIs on Ethereum
GraphQL Galaxy 2021GraphQL Galaxy 2021
8 min
Building GraphQL APIs on Ethereum
This Talk is about building GraphQL APIs on top of Ethereum and the Ethereum virtual machine. The graph is an indexing protocol for querying blockchain networks like Ethereum and IPFS. Developers can build APIs called subgraphs to efficiently index data and make it available for querying from frontend applications. The graph serves over 1 billion queries per day and is used in various Web3 applications including DeFi, gaming, and NFT marketplaces. The process involves defining the data model using the GraphQL schema and contract addresses, deploying and testing the subgraph, and using a GraphQL client to query the subgraph.
Building Dapps with React
React Advanced 2021React Advanced 2021
30 min
Building Dapps with React
The Talk discusses building decentralized applications (DApps) with React and explores the benefits of smart contract technology. It highlights the characteristics and infrastructure of Web 3 applications, including decentralized indexing, off-chain data storage, and decentralized file storage. The Talk also covers identity in Web 3, with a focus on self-sovereign identity and the use of blockchain for identity verification. The process of building a DApp with React and Hard Hat is explained, along with deploying contracts and interacting with them. Overall, the Talk provides insights into the world of DApps and the technologies involved.
React on the Blockchain - the Missing Getting Started Guide
React Summit Remote Edition 2021React Summit Remote Edition 2021
32 min
React on the Blockchain - the Missing Getting Started Guide
Today's talk is a guide to developing on the blockchain using Solidity and React. It covers the basics of blockchain, Ethereum, and smart contracts. Interacting with the blockchain involves submitting transactions and solving cryptographic puzzles. Smart contracts can be written in Solidity and tested using the Remix Web IDE. To connect to the Ethereum blockchain, you can run a local node or use an Ethereum node provider. Setting up the development environment involves installing Node.js, Python, Truffle, and MetaMask. Working with Web3 allows for interacting with contracts. The blockchain provides transparency and decentralized networks for use cases like decentralized finance.