Crash Course on SubQuery Network: Indexing and Searching Decentralized Blockchain Data

🔎 Google indexes web pages and provides search results based on algorithms.

🌐 The current internet is centralized, but blockchain offers a decentralized alternative.

⛓️ Data in blockchain is stored in blocks and chained together, providing immutability and trust.

🔍 SubQuery Network provides a data service to search blockchain data.

👥 The participants in the SubQuery Network are consumers, indexers, and delegators.

💰 Consumers pay with SubQuery tokens (SQT) to receive the data service.

💼 The SubQuery Network allows participants to turn computational and networking power into profits by providing services and staking SQT.

💰 Indexers can earn more rewards by staking a higher amount of SQT, and delegators can support indexers and receive a portion of their rewards.

👨‍💻 Consumers, indexers, and delegators are the main participants in the SubQuery Network, with consumers consuming data, indexers hosting projects, and delegators supporting indexers.

🔍 The SubQuery network runs on the GraphQL engine and allows users to fetch and index blocks from the Polkadot network.

🔧 To run the SubQuery project, users need to ensure that Docker is running and the necessary images are pulled.

🏗️ By deploying the SubQuery project on the managed service provided by the SubQuery network, users can make their project accessible to the public and easily access data from the network.

🔧 Running the project and verifying it locally using Docker and localhost

🌐 Publishing the project on GitHub and making it public

🚀 Using the staging slot for deploying new versions and accessing the query endpoint

🔑 The video explains the process of deploying a project on the SubQuery network and the steps involved.

📚 The video also introduces GraphQL and how it can be used to fetch specific data from a SubQuery project.

💻 The speaker demonstrates the setup and configuration of a SubQuery project, including modifying the GraphQL schema and handling events.

💡 To set up the project, install the necessary dependency modules and create a folder called 'node modules'.

🔧 Make changes to the GraphQL file for the transfer entity, generate a mapping file using the 'code gen' command, and update the project.yaml file.

🏗️ Modify the TypeScript file to handle transfer events and save the transfer object. Build and run the code using 'npm' commands and access the GraphQL queries in the browser.