{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$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"}
        }
      }
    }
  }
}