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Samuel Chong
@stakesaurus
Realised that missed attestation alerts via beaconchain are less useful when running DVTs so I created a simple client-level downtime alerts Telegram chatbot for myself. Any solo stakers keen on a fun weekend project to share some feedback? - https://github.com/samuelclk/ETH-node-alerts-TG-bot
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Samuel Chong
@stakesaurus
Missed attestation alerts via the http://beaconcha.in watchlist occur on the onchain validator key level. However, using DVTs means that your node =/= validator. i.e. A cluster of X nodes is responsible for hosting Y validator keys.
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Samuel Chong
@stakesaurus
This means that we either need to manually check on our nodes periodically (tedious) or act when the cluster fails to achieve consensus, leading to missed attestations (and free-rider problems).
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Samuel Chong
@stakesaurus
As a solo staker using DVTs, I needed a way of being notified when my DVT-enabled node goes offline on the device/server level instead of on the onchain level. The http://beaconcha.in app does have a “machine offline” notifier but only for 1 machine on the free plan.
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Samuel Chong
@stakesaurus
I wanted something that puts all DVT operators of a cluster in the same group chat and alerts everyone when any one of the nodes in the cluster goes down — keeping everyone accountable!
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Samuel Chong
@stakesaurus
This lightweight Python script can be run externally on a small + low-powered device and scheduled as a CronJob to monitor as many nodes as you want. Running it externally (vs from your node) means that the risks/trust assumptions from running unknown scripts are much lower
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Samuel Chong
@stakesaurus
The condition, however, is that the nodes you want to monitor this way need to be in the same VPN (e.g. Tailscale), which means it’s possible for a malicious cluster participant to DOS the other nodes by overwhelming them with pings. Although there are no benefits to doing so.
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