Batching discovery & upgrade: cryptocompare, cmc, tradermade

[bryanjowers]

We want to upgrade certain EAs to support batching capabilities to reduce the number of requests on the data provider API.

Batching allows us to combine multiple requests into a single request on the data provider. This is only made possible if the data provider's API supports a batch request (for example, requesting BTC-USD and BTC-ETH in a single request, rather than requesting separately in 2 API calls)

The task here is to review if these existing EAs and their API provider can support batching. Upgrade those that can support it.

Examples of EAs with batching support already implemented:

• cryptocompare
  https://github.com/smartcontractkit/external-adapters-js/tree/develop/packages/sources/cryptocompare
• coinmarketcap
  https://github.com/smartcontractkit/external-adapters-js/tree/develop/packages/sources/coinmarketcap
• tradermade
  https://github.com/smartcontractkit/external-adapters-js/tree/develop/packages/sources/tradermade

EAs that need checking: (please check those that can be upgraded based on API support):

• finage
• dxfeed
• kaiko
• nomics