Celestia · Schema

Celestia Extended Header

A Celestia ExtendedHeader bundles the underlying CometBFT header, validator set, last commit, and the Data Availability Header (DAH) of erasure-coded row and column roots over the extended data square (EDS).

Properties

Name	Type	Description
header	object	Tendermint/CometBFT block header.
validator_set	object	Active validator set used to verify the commit.
commit	object	Block commit (signatures) attesting to the header.
dah	object	Data Availability Header. Roots over the rows and columns of the erasure-coded extended data square.

View JSON Schema on GitHub

JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/celestia/main/json-schema/celestia-extended-header-schema.json",
  "title": "Celestia Extended Header",
  "description": "A Celestia ExtendedHeader bundles the underlying CometBFT header, validator set, last commit, and the Data Availability Header (DAH) of erasure-coded row and column roots over the extended data square (EDS).",
  "type": "object",
  "required": ["header", "dah"],
  "properties": {
    "header": {
      "type": "object",
      "description": "Tendermint/CometBFT block header.",
      "properties": {
        "version": {"type": "object"},
        "chain_id": {"type": "string"},
        "height": {"type": "integer"},
        "time": {"type": "string", "format": "date-time"},
        "last_block_id": {"type": "object"},
        "last_commit_hash": {"type": "string"},
        "data_hash": {"type": "string"},
        "validators_hash": {"type": "string"},
        "next_validators_hash": {"type": "string"},
        "consensus_hash": {"type": "string"},
        "app_hash": {"type": "string"},
        "last_results_hash": {"type": "string"},
        "evidence_hash": {"type": "string"},
        "proposer_address": {"type": "string"}
      }
    },
    "validator_set": {
      "type": "object",
      "description": "Active validator set used to verify the commit."
    },
    "commit": {
      "type": "object",
      "description": "Block commit (signatures) attesting to the header."
    },
    "dah": {
      "type": "object",
      "description": "Data Availability Header. Roots over the rows and columns of the erasure-coded extended data square.",
      "required": ["row_roots", "column_roots"],
      "properties": {
        "row_roots": {
          "type": "array",
          "items": {"type": "string"}
        },
        "column_roots": {
          "type": "array",
          "items": {"type": "string"}
        }
      }
    }
  }
}

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