Gnosis Beacon — ValidatorRequiredApi (2/2)

API reference for Gnosis Beacon. All methods ->

Part 2 of 2: 1 · 2

POST /eth/v1/validator/prepare_beacon_proposer

Provides the Beacon node with proposals for the given validators.

Prepares the beacon node for potential proposers by supplying information required when proposing blocks for the given validators. The information supplied for each validator index will persist through the epoch in which the call is submitted and for a further two epochs after that, or until the beacon node restarts. It is expected that validator clients will send this information periodically, for example each epoch, to ensure beacon nodes have correct and timely fee recipient information.

Note that there is no guarantee that the beacon node will use the supplied fee recipient when creating a block proposal, so on receipt of a proposed block the validator should confirm that it finds the fee recipient within the block acceptable before signing it.

Also note that requests containing currently inactive or unknown validator indices will be accepted, as they may become active at a later epoch.

Parameters

• <request body>:

[
  {
    "validator_index": "1",
    "fee_recipient": "0xabcf8e0d4e9587369b2301d0790347320302cc09"
  }
]

Request example

curl -X POST "https://rpc.ankr.com/premium-http/gnosis_beacon/YOUR_ANKR_API_KEY/eth/v1/validator/prepare_beacon_proposer" \
-H "Content-Type: application/json" \
-H "Accept: application/json" \
-d '{request body}'

Responses

• Code 200: Success. Preparation information has been received.
• Code 400: Invalid request syntax.

{
  "code": 400,
  "message": "string",
  "stacktraces": [
    "string"
  ]
}

• Code 500: Beacon node internal error.

{
  "code": 500,
  "message": "Internal server error"
}

---

GET /eth/v1/events

Subscribes to Beacon node events.

Provides endpoint to subscribe to beacon node Server-Sent-Events stream. Consumers should use eventsource implementation to listen on those events.

Servers may send SSE comments beginning with : for any purpose, including to keep the event stream connection alive in the presence of proxy servers.

Parameters

• topics (array[string]; query; required): event types to subscribe to; available values : head, block, attestation, voluntary_exit, finalized_checkpoint, chain_reorg, contribution_and_proof.

Request example

curl -X GET "https://rpc.ankr.com/premium-http/gnosis_beacon/YOUR_ANKR_API_KEY/eth/v1/events" \
-H "Accept: text/event-stream"

Responses

• Code 200: Opened SSE stream.

Head event:

The node has finished processing, resulting in a new head. previous_duty_dependent_root is get_block_root_at_slot(state, compute_start_slot_at_epoch(epoch - 1) - 1) and current_duty_dependent_root is get_block_root_at_slot(state, compute_start_slot_at_epoch(epoch) - 1). Both dependent roots use the genesis block root in the case of underflow.

event: head
data: {"slot":"10", "block":"0x9a2fefd2fdb57f74993c7780ea5b9030d2897b615b89f808011ca5aebed54eaf", "state":"0x600e852a08c1200654ddf11025f1ceacb3c2e74bdd5c630cde0838b2591b69f9", "epoch_transition":false, "previous_duty_dependent_root":"0x5e0043f107cb57913498fbf2f99ff55e730bf1e151f02f221e977c91a90a0e91", "current_duty_dependent_root":"0x5e0043f107cb57913498fbf2f99ff55e730bf1e151f02f221e977c91a90a0e91", "execution_optimistic": false}

Block event:

The node has received a valid block (from P2P or API).

event: block
data: {"slot":"10", "block":"0x9a2fefd2fdb57f74993c7780ea5b9030d2897b615b89f808011ca5aebed54eaf", "execution_optimistic": false}

Attestation event:

The node has received a valid attestation (from P2P or API).

event: attestation
data: {"aggregation_bits":"0x01", "signature":"0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505", "data":{"slot":"1", "index":"1", "beacon_block_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", "source":{"epoch":"1", "root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"}, "target":{"epoch":"1", "root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"}}}

Voluntary exit event:

The node has received a valid voluntary exit (from P2P or API).

event: voluntary_exit
data: {"message":{"epoch":"1", "validator_index":"1"}, "signature":"0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"}

Finalized checkpoint event:

Finalized checkpoint has been updated.

event: finalized_checkpoint
data: {"block":"0x9a2fefd2fdb57f74993c7780ea5b9030d2897b615b89f808011ca5aebed54eaf", "state":"0x600e852a08c1200654ddf11025f1ceacb3c2e74bdd5c630cde0838b2591b69f9", "epoch":"2", "execution_optimistic": false }

Chain reorg event:

The node has reorganized its chain.

event: chain_reorg
data: {"slot":"200", "depth":"50", "old_head_block":"0x9a2fefd2fdb57f74993c7780ea5b9030d2897b615b89f808011ca5aebed54eaf", "new_head_block":"0x76262e91970d375a19bfe8a867288d7b9cde43c8635f598d93d39d041706fc76", "old_head_state":"0x9a2fefd2fdb57f74993c7780ea5b9030d2897b615b89f808011ca5aebed54eaf", "new_head_state":"0x600e852a08c1200654ddf11025f1ceacb3c2e74bdd5c630cde0838b2591b69f9", "epoch":"2", "execution_optimistic": false}

Contribution and proof event:

The node has received a valid sync committee SignedContributionAndProof (from P2P or API).

event: contribution_and_proof
data: {"message": {"aggregator_index": "997", "contribution": {"slot": "168097", "beacon_block_root": "0x56f1fd4262c08fa81e27621c370e187e621a67fc80fe42340b07519f84b42ea1", "subcommittee_index": "0", "aggregation_bits": "0xffffffffffffffffffffffffffffffff", "signature": "0x85ab9018e14963026476fdf784cc674da144b3dbdb47516185438768774f077d882087b90ad642469902e782a8b43eed0cfc1b862aa9a473b54c98d860424a702297b4b648f3f30bdaae8a8b7627d10d04cb96a2cc8376af3e54a9aa0c8145e3"}, "selection_proof": "0x87c305f04bfe5db27c2b19fc23e00d7ac496ec7d3e759cbfdd1035cb8cf6caaa17a36a95a08ba78c282725e7b66a76820ca4eb333822bd399ceeb9807a0f2926c67ce67cfe06a0b0006838203b493505a8457eb79913ce1a3bcd1cc8e4ef30ed"}, "signature": "0xac118511474a94f857300b315c50585c32a713e4452e26a6bb98cdb619936370f126ed3b6bb64469259ee92e69791d9e12d324ce6fd90081680ce72f39d85d50b0ff977260a8667465e613362c6d6e6e745e1f9323ec1d6f16041c4e358839ac"}