Frequent "Unknown error" with getHistoricalRates — need for better error handling and debugging

[dawadam]

Hi,

I frequently use the getHistoricalRates method and often encounter a generic error like:

Unknown error

This happens especially when calling the method multiple times.

Since the message is very vague, it’s hard to know what’s actually causing the issue (network problem, API rate limit, invalid parameters, etc.). This makes debugging difficult, and there’s currently no way to identify the root cause.

It would be very helpful to improve:

• The clarity of returned errors (with more explicit codes or messages)
• The documentation about possible errors from getHistoricalRates
• The ability to enable a debug mode or more detailed logs

Thanks in advance, and great work on the library!