[Wallet] Available balance - Desktop

[ChaimaaZaoui]

As a user, I want to connect my wallet through Keplr, so that I can see the available balance.

Acceptance criteria

Scenario 1 : Wallet balance

Given that I am an end user,
And I have connected my wallet through Keplr
When I click on wallet button on my desktop
And the menu opens
Then I should be able to read the exact number of Know that I have in my wallet

The balance of the wallet is updated every time the user opens the dropdown menu

No automatic update is to be implemented

If the update requires couple of minutes, then display a loader to the user

┆Issue is synchronized with this Wrike task by Unito

[fredericvilcot]

As a technical implementation, we need to focus on 2 parts:

• the logic domain called Bank that must ensure the RPC calls to the blockchain to get back the account balance
• the UI dropdown in the toolbar that must be wired to a getBalance command and then display the received data

@ChaimaaZaoui
For now, I'l suggest to only refresh the balance when the connect menu (dropdown) is opened because our app is a bit different from Osmosis one: they directly display the balance in the page while we display the balance at the drop-down opening.
If you agree, we have no need to refresh the balance in another ways.

[ChaimaaZaoui]

Hey team! Please add your planning poker estimate with Zenhub @0xLodz @AnjaMis @ErikssonJoakim @fredericvilcot