Blockchain Development for Finance Projects

Writing the app methods

Our App.js file will define the methods that will be called by the child components. It'll also render the container component and pass it the state of the app, in which the container component will then transfer to the child components when they are rendered.

The app will use the following methods:

• startTimer: Sets an interval of 5 seconds and calls the pathcheck() method every 5 seconds to see whether there is a mismatch in the last modified time or file tree structure compared to the version recorded in the blockchain.
• hashFile: The method that calls the backend /api/hashwrite service to write hash signatures to the blockchain and updates the app state with the list of files being monitored, the FTH, the MTH, ...