Unable to read or write without readOnlyUrl in config (if user is connected)

[gsteenkamp89]

Expected bahavior:

We can use user's injected provider for reads & writes once connected. without the need for a readOnlyUrl inside config.

Current behaviour:

Now it seems we must provide readOnlyUrls to the config otherwise we are unable to read or write.
If we don't provide a readOnlyUrl but user's wallet is connected:

• useEtherBalance also always returns undefined
• making transactions throws errors

Shouldn't we be able to use the user's provider for reads & writes?