lighthouse/book/src/api-lighthouse.md

# Lighthouse Non-Standard APIs

Lighthouse fully supports the standardization efforts at
[github.com/ethereum/eth2.0-APIs](https://github.com/ethereum/eth2.0-APIs),
however sometimes development requires additional endpoints that shouldn't
necessarily be defined as a broad-reaching standard.  Such endpoints are placed
behind the `/lighthouse` path.

The endpoints behind the `/lighthouse` path are:

- Not intended to be stable.
- Not guaranteed to be safe.
- For testing and debugging purposes only.

Although we don't recommend that users rely on these endpoints, we
document them briefly so they can be utilized by developers and
researchers.

### `/lighthouse/health`

*Presently only available on Linux.*

```bash
curl -X GET "http://localhost:5052/lighthouse/health" -H  "accept: application/json" | jq
```

```json
{
  "data": {
    "sys_virt_mem_total": 16671133696,
    "sys_virt_mem_available": 8273715200,
    "sys_virt_mem_used": 7304818688,
    "sys_virt_mem_free": 2998190080,
    "sys_virt_mem_percent": 50.37101,
    "sys_virt_mem_cached": 5013975040,
    "sys_virt_mem_buffers": 1354149888,
    "sys_loadavg_1": 2.29,
    "sys_loadavg_5": 3.48,
    "sys_loadavg_15": 3.72,
    "cpu_cores": 4,
    "cpu_threads": 8,
    "system_seconds_total": 5728,
    "user_seconds_total": 33680,
    "iowait_seconds_total": 873,
    "idle_seconds_total": 177530,
    "cpu_time_total": 217447,
    "disk_node_bytes_total": 358443397120,
    "disk_node_bytes_free": 70025089024,
    "disk_node_reads_total": 1141863,
    "disk_node_writes_total": 1377993,
    "network_node_bytes_total_received": 2405639308,
    "network_node_bytes_total_transmit": 328304685,
    "misc_node_boot_ts_seconds": 1620629638,
    "misc_os": "linux",
    "pid": 4698,
    "pid_num_threads": 25,
    "pid_mem_resident_set_size": 783757312,
    "pid_mem_virtual_memory_size": 2564665344,
    "pid_process_seconds_total": 22
  }
}

```

### `/lighthouse/syncing`

```bash
curl -X GET "http://localhost:5052/lighthouse/syncing" -H  "accept: application/json" | jq
```

```json
{
  "data": {
    "SyncingFinalized": {
      "start_slot": 3104,
      "head_slot": 343744,
      "head_root": "0x1b434b5ed702338df53eb5e3e24336a90373bb51f74b83af42840be7421dd2bf"
    }
  }
}
```

### `/lighthouse/peers`

```bash
curl -X GET "http://localhost:5052/lighthouse/peers" -H  "accept: application/json" | jq
```

```json
[
  {
    "peer_id": "16Uiu2HAmA9xa11dtNv2z5fFbgF9hER3yq35qYNTPvN7TdAmvjqqv",
    "peer_info": {
      "_status": "Healthy",
      "score": {
        "score": 0
      },
      "client": {
        "kind": "Lighthouse",
        "version": "v0.2.9-1c9a055c",
        "os_version": "aarch64-linux",
        "protocol_version": "lighthouse/libp2p",
        "agent_string": "Lighthouse/v0.2.9-1c9a055c/aarch64-linux"
      },
      "connection_status": {
        "status": "disconnected",
        "connections_in": 0,
        "connections_out": 0,
        "last_seen": 1082,
        "banned_ips": []
      },
      "listening_addresses": [
        "/ip4/80.109.35.174/tcp/9000",
        "/ip4/127.0.0.1/tcp/9000",
        "/ip4/192.168.0.73/tcp/9000",
        "/ip4/172.17.0.1/tcp/9000",
        "/ip6/::1/tcp/9000"
      ],
      "sync_status": {
        "Advanced": {
          "info": {
            "status_head_slot": 343829,
            "status_head_root": "0xe34e43efc2bb462d9f364bc90e1f7f0094e74310fd172af698b5a94193498871",
            "status_finalized_epoch": 10742,
            "status_finalized_root": "0x1b434b5ed702338df53eb5e3e24336a90373bb51f74b83af42840be7421dd2bf"
          }
        }
      },
      "meta_data": {
        "seq_number": 160,
        "attnets": "0x0000000800000080"
      }
    }
  }
]
```

### `/lighthouse/peers/connected`

```bash
curl -X GET "http://localhost:5052/lighthouse/peers/connected" -H  "accept: application/json" | jq
```

```json
[
  {
    "peer_id": "16Uiu2HAkzJC5TqDSKuLgVUsV4dWat9Hr8EjNZUb6nzFb61mrfqBv",
    "peer_info": {
      "_status": "Healthy",
      "score": {
        "score": 0
      },
      "client": {
        "kind": "Lighthouse",
        "version": "v0.2.8-87181204+",
        "os_version": "x86_64-linux",
        "protocol_version": "lighthouse/libp2p",
        "agent_string": "Lighthouse/v0.2.8-87181204+/x86_64-linux"
      },
      "connection_status": {
        "status": "connected",
        "connections_in": 1,
        "connections_out": 0,
        "last_seen": 0,
        "banned_ips": []
      },
      "listening_addresses": [
        "/ip4/34.204.178.218/tcp/9000",
        "/ip4/127.0.0.1/tcp/9000",
        "/ip4/172.31.67.58/tcp/9000",
        "/ip4/172.17.0.1/tcp/9000",
        "/ip6/::1/tcp/9000"
      ],
      "sync_status": "Unknown",
      "meta_data": {
        "seq_number": 1819,
        "attnets": "0xffffffffffffffff"
      }
    }
  }
]
```

### `/lighthouse/proto_array`

```bash
curl -X GET "http://localhost:5052/lighthouse/proto_array" -H  "accept: application/json" | jq
```

*Example omitted for brevity.*

### `/lighthouse/validator_inclusion/{epoch}/{validator_id}`

See [Validator Inclusion APIs](./validator-inclusion.md).

### `/lighthouse/validator_inclusion/{epoch}/global`

See [Validator Inclusion APIs](./validator-inclusion.md).

### `/lighthouse/eth1/syncing`

Returns information regarding the Eth1 network, as it is required for use in
Eth2

#### Fields

- `head_block_number`, `head_block_timestamp`: the block number and timestamp
from the very head of the Eth1 chain. Useful for understanding the immediate
health of the Eth1 node that the beacon node is connected to.
- `latest_cached_block_number` & `latest_cached_block_timestamp`: the block
number and timestamp of the latest block we have in our block cache.
	- For correct Eth1 voting this timestamp should be later than the
`voting_period_start_timestamp`.
- `voting_target_timestamp`: The latest timestamp allowed for an eth1 block in this voting period.
- `eth1_node_sync_status_percentage` (float): An estimate of how far the head of the
	Eth1 node is from the head of the Eth1 chain.
	- `100.0` indicates a fully synced Eth1 node.
	- `0.0` indicates an Eth1 node that has not verified any blocks past the
		genesis block.
- `lighthouse_is_cached_and_ready`: Is set to `true` if the caches in the
	beacon node are ready for block production.
	- This value might be set to
	`false` whilst `eth1_node_sync_status_percentage == 100.0` if the beacon
	node is still building its internal cache.
	- This value might be set to `true` whilst
	`eth1_node_sync_status_percentage < 100.0` since the cache only cares
	about blocks a certain distance behind the head.

#### Example

```bash
curl -X GET "http://localhost:5052/lighthouse/eth1/syncing" -H  "accept: application/json" | jq
```

```json
{
  "data": {
    "head_block_number": 3611806,
    "head_block_timestamp": 1603249317,
    "latest_cached_block_number": 3610758,
    "latest_cached_block_timestamp": 1603233597,
    "voting_target_timestamp": 1603228632,
    "eth1_node_sync_status_percentage": 100,
    "lighthouse_is_cached_and_ready": true
  }
}
```

### `/lighthouse/eth1/block_cache`

Returns a list of all the Eth1 blocks in the Eth1 voting cache.

#### Example

```bash
curl -X GET "http://localhost:5052/lighthouse/eth1/block_cache" -H  "accept: application/json" | jq
```

```json
{
  "data": [
    {
      "hash": "0x3a17f4b7ae4ee57ef793c49ebc9c06ff85207a5e15a1d0bd37b68c5ef5710d7f",
      "timestamp": 1603173338,
      "number": 3606741,
      "deposit_root": "0xd24920d936e8fb9b67e93fd126ce1d9e14058b6d82dcf7d35aea46879fae6dee",
      "deposit_count": 88911
    },
    {
      "hash": "0x78852954ea4904e5f81038f175b2adefbede74fbb2338212964405443431c1e7",
      "timestamp": 1603173353,
      "number": 3606742,
      "deposit_root": "0xd24920d936e8fb9b67e93fd126ce1d9e14058b6d82dcf7d35aea46879fae6dee",
      "deposit_count": 88911
    }
  ]
}
```

### `/lighthouse/eth1/deposit_cache`

Returns a list of all cached logs from the deposit contract.

#### Example

```bash
curl -X GET "http://localhost:5052/lighthouse/eth1/deposit_cache" -H  "accept: application/json" | jq
```

```json
{
  "data": [
    {
      "deposit_data": {
        "pubkey": "0xae9e6a550ac71490cdf134533b1688fcbdb16f113d7190eacf4f2e9ca6e013d5bd08c37cb2bde9bbdec8ffb8edbd495b",
        "withdrawal_credentials": "0x0062a90ebe71c4c01c4e057d7d13b944d9705f524ebfa24290c22477ab0517e4",
        "amount": "32000000000",
        "signature": "0xa87a4874d276982c471e981a113f8af74a31ffa7d18898a02df2419de2a7f02084065784aa2f743d9ddf80952986ea0b012190cd866f1f2d9c633a7a33c2725d0b181906d413c82e2c18323154a2f7c7ae6f72686782ed9e423070daa00db05b"
      },
      "block_number": 3086571,
      "index": 0,
      "signature_is_valid": false
    },
    {
      "deposit_data": {
        "pubkey": "0xb1d0ec8f907e023ea7b8cb1236be8a74d02ba3f13aba162da4a68e9ffa2e395134658d150ef884bcfaeecdf35c286496",
        "withdrawal_credentials": "0x00a6aa2a632a6c4847cf87ef96d789058eb65bfaa4cc4e0ebc39237421c22e54",
        "amount": "32000000000",
        "signature": "0x8d0f8ec11935010202d6dde9ab437f8d835b9cfd5052c001be5af9304f650ada90c5363022e1f9ef2392dd222cfe55b40dfd52578468d2b2092588d4ad3745775ea4d8199216f3f90e57c9435c501946c030f7bfc8dbd715a55effa6674fd5a4"
      },
      "block_number": 3086579,
      "index": 1,
      "signature_is_valid": false
    }
  ]
}
```

### `/lighthouse/beacon/states/{state_id}/ssz`

Obtains a `BeaconState` in SSZ bytes. Useful for obtaining a genesis state.

The `state_id` parameter is identical to that used in the [Standard Eth2.0 API
`beacon/state`
routes](https://ethereum.github.io/eth2.0-APIs/#/Beacon/getStateRoot).

```bash
curl -X GET "http://localhost:5052/lighthouse/beacon/states/0/ssz" | jq
```

*Example omitted for brevity, the body simply contains SSZ bytes.*

### `/lighthouse/liveness`

POST request that checks if any of the given validators have attested in the given epoch. Returns a list
of objects, each including the validator index, epoch, and `is_live` status of a requested validator.

This endpoint is used in doppelganger detection, and will only provide accurate information for the
current, previous, or next epoch.


```bash
curl -X POST "http://localhost:5052/lighthouse/liveness" -d '{"indices":["0","1"],"epoch":"1"}' -H  "content-type: application/json" | jq
```

```json
{
    "data": [
        {
            "index": "0",
            "epoch": "1",
            "is_live": true
        }
    ]
}
```

### `/lighthouse/database/info`

Information about the database's split point and anchor info.

```bash
curl "http://localhost:5052/lighthouse/database/info" | jq
```

```json
{
  "schema_version": 5,
  "split": {
    "slot": "2034912",
    "state_root": "0x11c8516aa7d4d1613e84121e3a557ceca34618b4c1a38f05b66ad045ff82b33b"
  },
  "anchor": {
    "anchor_slot": "2034720",
    "oldest_block_slot": "1958881",
    "oldest_block_parent": "0x1fd3d855d03e9df28d8a41a0f9cb9d4c540832b3ca1c3e1d7e09cd75b874cc87",
    "state_upper_limit": "2035712",
    "state_lower_limit": "0"
  }
}
```

For more information about the split point, see the [Database Configuration](./advanced_database.md)
docs.

The `anchor` will be `null` unless the node has been synced with checkpoint sync and state
reconstruction has yet to be completed. For more information
on the specific meanings of these fields see the docs on [Checkpoint
Sync](./checkpoint-sync.md#reconstructing-states).

### `/lighthouse/database/reconstruct`

Instruct Lighthouse to begin reconstructing historic states, see
[Reconstructing States](./checkpoint-sync.md#reconstructing-states). This is an alternative
to the `--reconstruct-historic-states` flag.

```
curl -X POST "http://localhost:5052/lighthouse/database/reconstruct" | jq
```

```json
"success"
```

The endpoint will return immediately. See the beacon node logs for an indication of progress.

### `/lighthouse/database/historical_blocks`

Manually provide `SignedBeaconBlock`s to backfill the database. This is intended
for use by Lighthouse developers during testing only.