Added an exchange connection but your coin history / balance is not imported even if it says last synced recently?
Make sure you enabled the "Import past transactions" toggle. Delta will only import past transactions (and hence the balance) only if this is enabled while adding the connection. It cannot be changed later.
Getting an error message when trying to sync an exchange connection? Here's what they mean and what you need to do / not do:
Your sync is waiting in the queue:
An error occurred while syncing and we'll try again later. As a user you cannot do much except wait. You can contact support if this error persists for more than 24 hours.
Error: invalid API credentials:
The API rejected your authentication data. As a user, you should check and update the API credentials (key, secret, etc.). Do not delete the exchange connection as this deletes imported transactions. You can just update the connection with new key if you wish to do so.
Error: API credentials have insufficient access:
We checked the credentials with the API and we could not perform some necessary operations (e.g. retrieve the trades) due to permissions error. As a user you have to go to the exchange and make sure all required permissions are enabled (see the instructions via the '?' symbol on top right).
Error: exchange rate-limited your IP. Please try again later:
Many exchanges limit the number of requests we (as an app) can make per hour. Hence, once we reach this limit, users get this error message. As a user you cannot do much, except to limit the amount of times you press refresh and lower the sync interval. (We have contacted some exchanges for a solution to this issue. In the mean time, try not to manually force-sync, as this will only worsen the issue.)
Error: exchange did not respond. Please try again later:
Some network error happened while trying to contact the API. This could be either on the your end (your internet connection) or the exchange's. As a user, try changing your network connection and/or try again later.
This API is temporary unavailable:
We have intentionally disabled this API on our back-end for whatever reason. As a user you cannot do much but wait for the issue to be resolved.