Implement new centralized price oracle system with APIs for RPI users to get historical fiat data

[wiz]

Official mempool.space backend

• Implement with 5-6 above exchanges
• Fetch 10-12 currencies from the above exchanges, insert into SQL
• Manually find and insert historical data on the internet to get full history from 2010
• Implement new API to expose above historical data over prod hostnames / Tor onion

 

Unofficial RPI users backend

• When starting up, check to see what data is missing
• Fetch missing historical data from centralized mempool.space oracle over Tor
• Hit mempool.space every hour to get updated fiat rates for the past hour?

Frontend

• Add new currency selector at bottom of home page
• Save preference with localStorage
• Get and display data from backend using user preferred fiat currency

[wiz]

Duplicate of #176