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Ethereum head watcher

Bot which watches Ethereum head and handle "events" and sends notifications through Alertmanager to Discord channel.

Currently it supports:

• new slashing events
• unexpected exit events
• forking events

Run via docker to monitor Lido validators

1. Copy .env.example to .env and fill it with your values
2. docker-compose up -d

Run via local python (for development)

1. Copy .env.example to .env and fill it with your values
2. poetry install
3. poetry run python -m src.main

Run with keys file to monitor your custom validators

All exits will be handled as unexpected for specified keys

1. Fill docker/validators/keys.yml with your values
2. Set KEYS_SOURCE=keys_file in .env

If you want to use another path, specify it in KEYS_FILE_PATH env variable

Application Env variables

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LOG_LEVEL - Application log level

• Required: false
• Default: info

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DRY_RUN - Dry run mode. If true, application will not send any alerts

• Required: false
• Default: false

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KEYS_SOURCE - Keys source. If keys_api - application will fetch keys from Keys API, if keys_file - application will fetch keys from KEYS_FILE_PATH

• Required: false
• Default: keys_api

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KEYS_FILE_PATH - Path to file with keys

• Required: if KEYS_SOURCE is keys_file
• Default: ./docker/validators/keys.yml

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CONSENSUS_CLIENT_URI - Ethereum consensus layer comma separated API urls

• Required: true

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EXECUTION_CLIENT_URI - Ethereum execution layer comma separated API urls

• Required: if KEYS_SOURCE is keys_api

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LIDO_LOCATOR_ADDRESS - Lido locator contract address

• Required: if KEYS_SOURCE is keys_api

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KEYS_API_URI - Comma separated Keys API urls

• Required: if KEYS_SOURCE is keys_api

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ALERTMANAGER_URI - Comma separated Alertmanager API urls

• Required: if DRY_RUN is false

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NETWORK_NAME - Ethereum network name (mainnet or goerli)

• Required: false
• Default: mainnet

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ADDITIONAL_ALERTMANAGER_LABELS - Additional labels for Alertmanager alerts for HeadWatcherUser.* alerts

• Required: false
• Default: {}

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SLOTS_RANGE - Range of slots to check (for development purposes)

• Required: false
• Default: undefined

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CYCLE_SLEEP_IN_SECONDS - Sleep time between main app task cycles

• Required: false
• Default: 1

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PROMETHEUS_PORT - Prometheus port

• Required: false
• Default: 9000

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PROMETHEUS_PREFIX - Prometheus metrics prefix

• Required: false
• Default: ethereum_head_watcher

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HEALTHCHECK_SERVER_PORT - Healthcheck server port

• Required: false
• Default: 9010

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MAX_CYCLE_LIFETIME_IN_SECONDS - Max cycle lifetime in seconds for healthcheck

• Required: false
• Default: 3000

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KEYS_API_REQUEST_TIMEOUT - Keys API request timeout in seconds

• Required: false
• Default: 180

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KEYS_API_REQUEST_RETRY_COUNT - Keys API request retries

• Required: false
• Default: 3

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KEYS_API_REQUEST_SLEEP_BEFORE_RETRY_IN_SECONDS - Keys API request retry timeout in seconds

• Required: false
• Default: 5

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CL_REQUEST_TIMEOUT - Consensus layer request timeout in seconds

• Required: false
• Default: 180
• Note: This variable don't change timeout for requests to blocks for keeping in sync with Ethereum head

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CL_REQUEST_RETRY_COUNT - Consensus layer request retries

• Required: false
• Default: 3
• Note: This variable don't change retries for requests to blocks for keeping in sync with Ethereum head

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CL_REQUEST_SLEEP_BEFORE_RETRY_IN_SECONDS - Consensus layer request retry timeout in seconds

• Required: false
• Default: 5
• Note: This variable don't change timeout for requests to blocks for keeping in sync with Ethereum head

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EL_REQUEST_TIMEOUT - Execution layer request timeout in seconds

• Required: false
• Default: 5

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ALERTMANAGER_REQUEST_TIMEOUT - Alertmanager request timeout in seconds

• Required: false
• Default: 2

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ALERTMANAGER_REQUEST_RETRY_COUNT - Alertmanager request retries

• Required: false
• Default: 2

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ALERTMANAGER_REQUEST_SLEEP_BEFORE_RETRY_IN_SECONDS - Alertmanager request retry timeout in seconds

• Required: false
• Default: 1

Application metrics

You can see application metrics on http://localhost:9000/metrics endpoint

The source of metrics:

• src/metrics/prometheus/basic.py
• src/metrics/prometheus/watcher.py

Release flow

To create new release:

1. Merge all changes to the main branch
2. Navigate to Repo => Actions
3. Run action "Prepare release" action against main branch
4. When action execution is finished, navigate to Repo => Pull requests
5. Find pull request named "chore(release): X.X.X" review and merge it with "Rebase and merge" (or "Squash and merge")
6. After merge release action will be triggered automatically
7. Navigate to Repo => Actions and see last actions logs for further details