How to build a custom blockchain implementation in Rust using Substrate

The tutorial guides readers through building a basic blockchain application in Rust using the Substrate framework, focusing on creating a backend for a blockchain-based blogging platform where users can submit posts, comment, and tip authors. The setup involves using the Substrate Node Template and Kickstart CLI to initialize the project, with custom functionality added through modifying specific files. The tutorial covers data structures for blog posts and comments, storage management using StorageMap, and event handling to notify users of changes. It explains implementing extrinsic functions for creating posts, adding comments, and tipping, emphasizing error handling and currency transfer. Testing of the application is done using the Substrate Front End Template, showcasing interactions with the blockchain. The tutorial concludes by acknowledging compile time challenges but highlights Substrate's robustness, support, and community resources.