Wallet - Handle blockchain status signal

[smohamedjavid]

Feature Issue

status-go sends a wallet-blockchain-status-changed signal with chain data (whether it's up or down).

If any of the chains is down (due to provider, network connectivity, or API exhaustion), we need to show a toast* to the user.

User Story

As a user, I want to know if any chain is down so that I will not perform any activity on it.

Description

On receiving wallet event wallet-blockchain-status-changed, the mobile app should check whether any chains are down. If there is any, we should inform the user with a toast.

Acceptance Criteria

• Toast is shown if any of the chains are down

Notes

To simulate chain down for testing/integration, use the wrong RPC URL in status-go.

*The design team is working on a sticky banner. For now, we will use Toast to inform the user