Minimal fees

[Thykof]

Context
Describe / explain why we should do this: motivations, context or other info. Keep it brief and simple - PM

Massa network will have a new feature of minimal operation fees.

User flow
Describe the user flow using user stories so the end result is super clear - PM

User will see in massa station wallet the fees that will allow the operation to get accepted by the node and included in a block.

Concerns:

1. the dapp may show to user that there no fee, but the sign prompt will show fees. Maybe we can add a tooltip saying that user is connected to a node that accept only operations with at leat 0.01 MAS fee?
2. the fee field is editable in the sign prompt, should we allow user to set a value bellow the minimal fee of the node?

How to
List the step-by-step to get it do if needed - PM

• Massa station, when connecting to a node, fetch the amount of minimal fees
• Massa station, when receiving an execute function request, will modify the operation to put at least the minimal of the connected node
• UX: cc @SlnPons @LucasF243 see the too concerns above ;)

Technical details
Give the technical insights so anyone in the team can tackle the tasks - Dev

the logic will be in sendoperation::Call

QA testing
Does this task require some QA tests ?
If yes, explain how to validate it

[SlnPons]

@Thykof do you think you can address this issue at the same time? massalabs/station-massa-wallet#814

[Thykof]

no need to change station