lighthouse/watch

beacon.watch

beacon.watch is pre-MVP and still under active development and subject to change.

beacon.watch is an Ethereum Beacon Chain monitoring platform whose goal is to provide fast access to data which is:

1. Not already stored natively in the Beacon Chain
2. Too specialized for Block Explorers
3. Too sensitive for public Block Explorers

Requirements

• git
• rust : https://rustup.rs/
• libpq : https://www.postgresql.org/download/
• diesel_cli :

cargo install diesel_cli --no-default-features --features postgres

• docker : https://docs.docker.com/engine/install/
• docker-compose : https://docs.docker.com/compose/install/

Setup

1. Setup the database:

cd postgres_docker_compose
docker-compose up

1. Ensure the tests pass:

cargo test --release

1. Drop the database (if it already exists) and run the required migrations:

diesel database reset --database-url postgres://postgres:postgres@localhost/dev

1. Ensure a synced Lighthouse beacon node with historical states is available at localhost:5052. The smaller the value of --slots-per-restore-point the faster beacon.watch will be able to sync to the beacon node.

2. Run the updater daemon:

cargo run --release -- run-updater

1. Start the HTTP API server:

cargo run --release -- serve

1. Ensure connectivity:

curl "http://localhost:5059/v1/slots/highest"

Functionality on MacOS has not been tested. Windows is not supported.

Configuration

beacon.watch can be configured through the use of a config file. Available options can be seen in config.yaml.default.

You can specify a config file during runtime:

cargo run -- run-updater --config path/to/config.yaml
cargo run -- serve --config path/to/config.yaml

You can specify only the parts of the config file which you need changed. Missing values will remain as their defaults.

For example, if you wish to run with default settings but only wish to alter log_level your config file would be:

# config.yaml
log_level = "info"

Available Endpoints

As beacon.watch continues to develop, more endpoints will be added.

In these examples any data containing information from blockprint has either been redacted or fabricated.

/v1/slots/{slot}

curl "http://localhost:5059/v1/slots/4635296"

{
  "slot": "4635296",
  "root": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62",
  "skipped": false,
  "beacon_block": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62"
}

/v1/slots?start_slot={}&end_slot={}

curl "http://localhost:5059/v1/slots?start_slot=4635296&end_slot=4635297"

[
  {
    "slot": "4635297",
    "root": "0x04ad2e963811207e344bebeba5b1217805bcc3a9e2ed9fcf2205d491778c6182",
    "skipped": false,
    "beacon_block": "0x04ad2e963811207e344bebeba5b1217805bcc3a9e2ed9fcf2205d491778c6182"
  },
  {
    "slot": "4635296",
    "root": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62",
    "skipped": false,
    "beacon_block": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62"
  }
]

/v1/slots/lowest

curl "http://localhost:5059/v1/slots/lowest"

{
  "slot": "4635296",
  "root": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62",
  "skipped": false,
  "beacon_block": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62"
}

/v1/slots/highest

curl "http://localhost:5059/v1/slots/highest"

{
  "slot": "4635358",
  "root": "0xe9eff13560688f1bf15cf07b60c84963d4d04a4a885ed0eb19ceb8450011894b",
  "skipped": false,
  "beacon_block": "0xe9eff13560688f1bf15cf07b60c84963d4d04a4a885ed0eb19ceb8450011894b"
}

v1/slots/{slot}/block

curl "http://localhost:5059/v1/slots/4635296/block"

{
  "slot": "4635296",
  "root": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62",
  "parent_root": "0x7c4860b420a23de9d126da71f9043b3744af98c847efd9e1440f2da8fbf7f31b"
}

/v1/blocks/{block_id}

curl "http://localhost:5059/v1/blocks/4635296"
# OR
curl "http://localhost:5059/v1/blocks/0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62"

{
  "slot": "4635296",
  "root": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62",
  "parent_root": "0x7c4860b420a23de9d126da71f9043b3744af98c847efd9e1440f2da8fbf7f31b"
}

/v1/blocks?start_slot={}&end_slot={}

curl "http://localhost:5059/v1/blocks?start_slot=4635296&end_slot=4635297"

[
  {
    "slot": "4635297",
    "root": "0x04ad2e963811207e344bebeba5b1217805bcc3a9e2ed9fcf2205d491778c6182",
    "parent_root": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62"
  },
  {
    "slot": "4635296",
    "root": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62",
    "parent_root": "0x7c4860b420a23de9d126da71f9043b3744af98c847efd9e1440f2da8fbf7f31b"
  }
]

/v1/blocks/{block_id}/previous

curl "http://localhost:5059/v1/blocks/4635297/previous"
# OR
curl "http://localhost:5059/v1/blocks/0x04ad2e963811207e344bebeba5b1217805bcc3a9e2ed9fcf2205d491778c6182/previous"

{
  "slot": "4635296",
  "root": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62",
  "parent_root": "0x7c4860b420a23de9d126da71f9043b3744af98c847efd9e1440f2da8fbf7f31b"
}

/v1/blocks/{block_id}/next

curl "http://localhost:5059/v1/blocks/4635296/next"
# OR
curl "http://localhost:5059/v1/blocks/0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62/next"

{
  "slot": "4635297",
  "root": "0x04ad2e963811207e344bebeba5b1217805bcc3a9e2ed9fcf2205d491778c6182",
  "parent_root": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62"
}

/v1/blocks/lowest

curl "http://localhost:5059/v1/blocks/lowest"

{
  "slot": "4635296",
  "root": "0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62",
  "parent_root": "0x7c4860b420a23de9d126da71f9043b3744af98c847efd9e1440f2da8fbf7f31b"
}

/v1/blocks/highest

curl "http://localhost:5059/v1/blocks/highest"

{
  "slot": "4635358",
  "root": "0xe9eff13560688f1bf15cf07b60c84963d4d04a4a885ed0eb19ceb8450011894b",
  "parent_root": "0xb66e05418bb5b1d4a965c994e1f0e5b5f0d7b780e0df12f3f6321510654fa1d2"
}

/v1/blocks/{block_id}/proposer

curl "http://localhost:5059/v1/blocks/4635296/proposer"
# OR
curl "http://localhost:5059/v1/blocks/0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62/proposer"

{
  "slot": "4635296",
  "proposer_index": 223126,
  "graffiti": ""
}

/v1/blocks/{block_id}/rewards

curl "http://localhost:5059/v1/blocks/4635296/reward"
# OR
curl "http://localhost:5059/v1/blocks/0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62/reward"

{
  "slot": "4635296",
  "total": 25380059,
  "attestation_reward": 24351867,
  "sync_committee_reward": 1028192
}

/v1/blocks/{block_id}/packing

curl "http://localhost:5059/v1/blocks/4635296/packing"
# OR
curl "http://localhost:5059/v1/blocks/0xf7063a9d6c663682e59bd0b41d29ce80c3ff0b089049ff8676d6f9ee79622c62/packing"

{
  "slot": "4635296",
  "available": 16152,
  "included": 13101,
  "prior_skip_slots": 0
}

/v1/validators/{validator}

curl "http://localhost:5059/v1/validators/1"
# OR
curl "http://localhost:5059/v1/validators/0xa1d1ad0714035353258038e964ae9675dc0252ee22cea896825c01458e1807bfad2f9969338798548d9858a571f7425c"

{
  "index": 1,
  "public_key": "0xa1d1ad0714035353258038e964ae9675dc0252ee22cea896825c01458e1807bfad2f9969338798548d9858a571f7425c",
  "status": "active_ongoing",
  "client": null,
  "activation_epoch": 0,
  "exit_epoch": null
}

/v1/validators/{validator}/attestation/{epoch}

curl "http://localhost:5059/v1/validators/1/attestation/144853"
# OR
curl "http://localhost:5059/v1/validators/0xa1d1ad0714035353258038e964ae9675dc0252ee22cea896825c01458e1807bfad2f9969338798548d9858a571f7425c/attestation/144853"

{
  "index": 1,
  "epoch": "144853",
  "source": true,
  "head": true,
  "target": true
}

/v1/validators/missed/{vote}/{epoch}

curl "http://localhost:5059/v1/validators/missed/head/144853"

[
  63,
  67,
  98,
  ...
]

/v1/validators/missed/{vote}/{epoch}/graffiti

curl "http://localhost:5059/v1/validators/missed/head/144853/graffiti"

{
  "Mr F was here": 3,
  "Lighthouse/v3.1.0-aa022f4": 5,
  ...
}

/v1/clients/missed/{vote}/{epoch}

curl "http://localhost:5059/v1/clients/missed/source/144853"

{
  "Lighthouse": 100,
  "Lodestar": 100,
  "Nimbus": 100,
  "Prysm": 100,
  "Teku": 100,
  "Unknown": 100
}

/v1/clients/missed/{vote}/{epoch}/percentages

Note that this endpoint expresses the following:

What percentage of each client implementation missed this vote?

curl "http://localhost:5059/v1/clients/missed/target/144853/percentages"

{
  "Lighthouse": 0.51234567890,
  "Lodestar": 0.51234567890,
  "Nimbus": 0.51234567890,
  "Prysm": 0.09876543210,
  "Teku": 0.09876543210,
  "Unknown": 0.05647382910
}

/v1/clients/missed/{vote}/{epoch}/percentages/relative

Note that this endpoint expresses the following:

For the validators which did miss this vote, what percentage of them were from each client implementation?

You can check these values against the output of /v1/clients/percentages to see any discrepancies.

curl "http://localhost:5059/v1/clients/missed/target/144853/percentages/relative"

{
  "Lighthouse": 11.11111111111111,
  "Lodestar": 11.11111111111111,
  "Nimbus": 11.11111111111111,
  "Prysm": 16.66666666666667,
  "Teku": 16.66666666666667,
  "Unknown": 33.33333333333333
}

/v1/clients

curl "http://localhost:5059/v1/clients"

{
  "Lighthouse": 5000,
  "Lodestar": 5000,
  "Nimbus": 5000,
  "Prysm": 5000,
  "Teku": 5000,
  "Unknown": 5000
}

/v1/clients/percentages

curl "http://localhost:5059/v1/clients/percentages"

{
  "Lighthouse": 16.66666666666667,
  "Lodestar": 16.66666666666667,
  "Nimbus": 16.66666666666667,
  "Prysm": 16.66666666666667,
  "Teku": 16.66666666666667,
  "Unknown": 16.66666666666667
}

Future work

• New tables

  • skip_slots?

• More API endpoints

  • /v1/proposers?start_epoch={}&end_epoch={} and similar
  • /v1/validators/{status}/count

• Concurrently backfill and forwards fill, so forwards fill is not bottlenecked by large backfills.

• Better/prettier (async?) logging.

• Connect to a range of beacon_nodes to sync different components concurrently. Generally, processing certain api queries such as block_packing and attestation_performance take the longest to sync.

Architecture

Connection Pooling:

• 1 Pool for Updater (read and write)
• 1 Pool for HTTP Server (should be read only, although not sure if we can enforce this)