Wrong error returned (gRPC: Too low energy)

[mh-concordium]

Bug Description
If user tries to delegate scheduled CCDs but doesn't have CCDs to pay for the transaction, user will receive user error (gRPC error Too low energy)

Steps to Reproduce
Try to delegate scheduled CCDs while not having any CCDs at disposal.

Expected Result
Warning before transaction is submitted that will tell that tx will fail due to not having enough CCDs.

Actual Result

Versions

• Software Version: Client 4.0.3. Node 4.1.0

┆Issue is synchronized with this Jira Bug by Unito

[abizjak]

The fact that the RPC error is wrong is caused by the node, specifically this issue Concordium/concordium-node#375

The client could also check before it submits of course, and that would be a nicer user experience. But if the node provided a correct response the error would already be much less confusing.

[abizjak]

The node issue has been fixed in Concordium/concordium-node#401 (that will be part of the ~August release).

From then on the transaction would fail immediately with a more correct error. The remaining issue here is the "check before submission".

[abizjak]

That last part is related/duplicate of #45