may be OT, but how do you subscribe to these trade feeds, is there a unified service or do you need to do it individually for each source, and how much does it cost approximately ?
I'm guessing if you put all this data into Kinesis or message queues it would end up costing quite a bit more.
There are probably unified services that let you do it - I was kinda competing in this area but didn't want to deal with enterprise sales, and it's a bit of a hard sell anyway.
If you do it individually, there are public developer docs for each exchange that explain how their API works. It's generally free as long as you're not making a large number of active trades.
Never heard of a crypto exchange that charges for data feeds, the norm is free and fast. One of the positive of the industry compared to old school finance.
They're rent seeking in other ways though, no worries.
I'm guessing if you put all this data into Kinesis or message queues it would end up costing quite a bit more.