Errors: Improve error message (Failed to create outputs for receive)

[Kelbie]

Most users won't know what this means, it looks a bit scary. In my situation I was trying to redeem ecash which was too small to cover the fees so naturally it errors.

[Kelbie]

I know some other wallets have a "receive later" functionality which will be useful in situations like this as the wallet could collect these small amounts then batch redeem them at a later point. But for this issue we can focus on just changing the error message to something a little nicer.

[Kelbie]

I know some other wallets have a "receive later" functionality which will be useful in situations like this as the wallet could collect these small amounts then batch redeem them at a later point. But for this issue we can focus on just changing the error message to something a little nicer.

Ignore this, I realized I can use .rollback which won't run into fee issues.

[Egge21M]

I think its a great suggestion! I opened a separate issue to track this improvement: #46
.rollback will run into the same issue, because if the operation is in pending state (token was created successfully) it will swap the proofs to properly reclaim them (this is necessary to a) prevent double spending and b) because Coco makes sure all owned proofs are recoverable / deterministic