POC of websockets on the swapper fomo list page

[twblack88]

We want to try using coincap for a POC of websockets on the swapper. On a single asset and then expanding out from there.

See how fast we burn through credits or not using our coincap API.

We want to evaluate using a proxy server.

[premiumjibles]

Findings so far:

• Current coincap adaptor asset list is pretty much non-existent for any non ethereum based tokens. We'll need to create a system to pull down more slug mappings. Perhaps auto generating it by pulling down all their tokens and matching on symbol
• We should be able to subscribe to the token price of as many tokens as we want. But we'll need to be on the coincap "growth" plan (which we might already be)?
• We'll need a proxy to manage token obfuscation and to unify the socket subscription to one subscriber. Otherwise we'll cap out super quickly.

[premiumjibles]

Waiting on unchained PR review before I can get the web POC in shapeshift/unchained#1153