[Feature] #4 - Notification settings

[kukabi]

User story

As a user, I want to be able to configure the notifications I want to receive about my validators, possibly on different Substrate networks, and on what channels to receive them, so that I can take action when required, or just get to know in real-time when certain events happen.

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Feature Details

Figure 4.1 SubVT configurable notification types.

Notifications can be received via email, push notifications, and for urgent events SMS and GSM. User is free to configure notifications for any of the following events.

• New nominator, or the change of the amount nominated from an existing nominator.
• Loss of a nominator.
• Offline offense, and the resulting chilling event.
• Voluntary chilling of a validator.
• Session keys change.
• Commission change.
• Active set inclusion and exclusion.
• Block authorship.
• Unclaimed payouts after a configurable x hours/sessions/eras.

Notifications related to Telemetry data if configured:

• Node behind by a configurable x blocks.
• Peer count below a configurable x peers.
• Offline for a configurable x seconds/minutes.
• More than a configurable x transactions in queue.
• Binary version out-of-date.
• Binary version change.

Network- and program-specific notifications, such as 1KV for Polkadot and Kusama:

• Rank change.
• Validity change.
• New fault.
• Score class change (A, B, C etc.)

Exact design details are not clear yet, but one approach under consideration is by defining rules and parameters.

Figure 4.2 A rule-based approach to notification configuration.

Implementation Details

SubVT backend scans every new finalized block and observes the SubVT Telemetry instance continuously and notifies the node operators according to the pre-defined notification rules.

Figure 4.3 Notification system overall view.