It's my attempt at a CoinTracker clone. Everything in it that's clickable should work. The submit buttons to track a wallet, links, POST methods to the DB, and outgoing requests to BlockChain should all be valid.
python3 -m venv venv
venv\Scripts\Activate.ps1
python3 -m pip install -r requirements.txt
python3 manage.py migrate
python3 manage.py runserverAfter setup, you can visit http://localhost:8000/wallets/
Some screenshots.
Home Page:
Details Page for a single wallet:
Originally I thought this was asking to create a ledger for a hypothetical cryptocurrency, and then store it all in a local database. So I ventured out to look into something friendly with Python, but wasn't sure which to choose between Flask and Django. Flask would help keep the codebase simple, but Django would have a lot of nice primitives (i.e. form redirection, out of the box ORM that maps to a Python class).
I didn't realize this should work with real data and then proceeded to look at https://blockchair.com and figure out how to work with the data. I'm not familiar with cryptocurrency either so I spent some time understanding the relationship between addresses and transactions. I was alternating between sending API requests and scraping to figure out how to model the data in Flask for a while before realizing it would be simpler to have a home page and a detail page for a specific wallet in Django and settled with Django in the end. I lost some time alternating between them. Spent time just brainstorming as well, figuring out if it was worthwile doing a single page application with just JavaScript/TypeScript.
Then it came to features. I wasn't sure how much scope to keep, there were a lot of different things to investigate for me between HTML templates, CSS, caching requests so I wouldn't get rate limited from the free tier on BlockChair, make the product look decent at least for a programmer (monospace, tables, Django Template filters for adding commas to big numbers), somewhat keeping it DRY by factoring outgoing API requests, adding nice extra frills like pagination, fighting with the right way to use hidden forms so I could autopopulate a field before sending it off as a POST request, outgoing links to a more 'authoritative' source like BlockChair in case a user would want to glean more information. It was an interesting open-ended project, lots of opportunities with different angles, and deciding how far I should go in one area between switching to another. I ended up with a very heavy detail() method too, I would love to make that leaner and get some code reusage there going on.