GET
/
0a9d79d93fb2f4a4b1e04695da2b77a7
/
eth
/
v1
/
beacon
/
states
/
{state_id}
/
finality_checkpoints
curl --request GET \
  --url https://beacon-nd-422-757-666.p2pify.com/0a9d79d93fb2f4a4b1e04695da2b77a7/eth/v1/beacon/states/{state_id}/finality_checkpoints
{
  "previous_justified": {
    "epoch": 123,
    "root": "aSDinaTvuI8gbWludGxpZnk="
  },
  "current_justified": {
    "epoch": 123,
    "root": "aSDinaTvuI8gbWludGxpZnk="
  },
  "finalized": {
    "epoch": 123,
    "root": "aSDinaTvuI8gbWludGxpZnk="
  }
}

The /eth/v1/beacon/states/{state_id}/finality_checkpoints endpoint retrieves the finality checkpoints of a specified Beacon Chain state. These checkpoints are critical in understanding the finality status of various epochs in the Ethereum PoS mechanism.

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​
Parameters

  • state_id — the state identifier for which finality checkpoint information is requested. Acceptable values for state_id include:
    • head — represents the current head of the chain from the node’s perspective.
    • genesis — the genesis state of the Beacon Chain.
    • finalized — the most recent state that has been finalized and is unlikely to undergo any further changes.
    • justified — the most recent state that has been justified, which is a stage preceding finalization.
    • <slot> — a specific time slot in the Ethereum protocol.
    • <hex encoded stateRoot with 0x prefix> — the specific state root, encoded in hexadecimal.

​
Response

The response includes an object with the following properties:

  • data — an object containing finality checkpoint information for the specified state:
    • previous_justified — an object representing the last justified checkpoint before the current epoch. It contains:
      • epoch — the epoch number of this justified checkpoint.
      • root — the block root of this justified checkpoint.
    • current_justified — an object representing the current justified checkpoint. It contains:
      • epoch — the epoch number of the current justified checkpoint.
      • root — the block root of the current justified checkpoint.
    • finalized — an object representing the current finalized checkpoint. It contains:
      • epoch — the epoch number of the finalized checkpoint.
      • root — the block root of the finalized checkpoint.

Path Parameters

​
state_id
string
default:head
required

State identifier which can be a slot number, an epoch number, a block root, or 'genesis', 'head' (default is 'head').

Response

200
application/json
Successful response with finality checkpoints information
​
previous_justified
object
​
current_justified
object
​
finalized
object