validate QX asset name (qxissueasset) #58
Description
Current behavior:
When creating a QX asset via qubic-cli (-qxissueasset) with a name with more than 7 characters or in lower case or with an already existing asset name, the QX issuance fee is paid but the asset is not issued.
Desired new behavior:
- for more than 7 chars or lower case: implement a check in qubic-cli that returns a warning to the user (without trying to issue the asset, hence not paying any fee)
- existing asset name: explicitly mention in help that it needs to be a new/unique asset name. Because every issuer has their own asset namespace we can assume the user knows which asset names they created before.