This is from an older attempt of mine that I'm sharing as a reference for others who are interested in building a sales alert tool. This does not use any of the ABI but you may go to https://www.notion.so/axie/Axie-Ronin-Developer-Information-623c6756391249b5a64d08cffd25ea02 to find and utilize them if you would prefer.
Follow the firebase documentation to set up your database.
You will need to update key.json with the service account file that you get from the Firebase console.
Update the DatabaseURL inside firebase.go accordingly.
Why Firebase?
Firebase RTDB and the SDK allows you to listen to database changes out of the box. It's great for a quick project, an alternative to the pub/sub service.
Remove all Firebase related code and replace it with your own DaaS and the rest of the project should still function well.