{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/blockchain/refs/heads/main/json-schema/data-api-block-schema.json",
  "title": "Block",
  "description": "A Bitcoin block including its transactions, header, and chain status.",
  "type": "object",
  "properties": {
    "hash": {
      "type": "string",
      "description": "Block hash.",
      "example": "00000000000000000004f4e7a1..."
    },
    "ver": {
      "type": "integer",
      "description": "Block version.",
      "example": 536870912
    },
    "prev_block": {
      "type": "string",
      "description": "Previous block hash."
    },
    "mrkl_root": {
      "type": "string",
      "description": "Merkle root."
    },
    "time": {
      "type": "integer",
      "format": "int64",
      "description": "Block timestamp (Unix seconds).",
      "example": 1748609400000
    },
    "bits": {
      "type": "integer",
      "description": "Difficulty bits.",
      "example": 1
    },
    "nonce": {
      "type": "integer",
      "format": "int64",
      "description": "Nonce used to mine the block.",
      "example": 1
    },
    "n_tx": {
      "type": "integer",
      "description": "Number of transactions in the block.",
      "example": 1
    },
    "size": {
      "type": "integer",
      "description": "Block size in bytes.",
      "example": 1
    },
    "block_index": {
      "type": "integer",
      "format": "int64",
      "description": "Internal block index.",
      "example": 1
    },
    "main_chain": {
      "type": "boolean",
      "description": "True if this block is part of the main chain.",
      "example": true
    },
    "height": {
      "type": "integer",
      "description": "Block height.",
      "example": 851234
    },
    "tx": {
      "type": "array",
      "description": "List of transactions included in the block.",
      "items": {
        "type": "object",
        "description": "A Bitcoin transaction with its inputs and outputs.",
        "properties": {
          "hash": {
            "type": "string",
            "description": "Transaction hash.",
            "example": "00000000000000000004f4e7a18a09b1f8e96d6fb01d9b6fce4d12cb3f8a7e21"
          },
          "ver": {
            "type": "integer",
            "description": "Transaction version.",
            "example": 1
          },
          "vin_sz": {
            "type": "integer",
            "description": "Number of inputs.",
            "example": 1
          },
          "vout_sz": {
            "type": "integer",
            "description": "Number of outputs.",
            "example": 1
          },
          "size": {
            "type": "integer",
            "description": "Serialized transaction size in bytes.",
            "example": 1
          },
          "weight": {
            "type": "integer",
            "description": "Transaction weight (BIP141).",
            "example": 1
          },
          "fee": {
            "type": "integer",
            "format": "int64",
            "description": "Fee paid in Satoshi.",
            "example": 1
          },
          "relayed_by": {
            "type": "string",
            "description": "IP address that relayed the transaction."
          },
          "lock_time": {
            "type": "integer",
            "format": "int64",
            "description": "Lock time (block height or Unix seconds).",
            "example": 1748609400000
          },
          "tx_index": {
            "type": "integer",
            "format": "int64",
            "description": "Internal transaction index.",
            "example": 1
          },
          "double_spend": {
            "type": "boolean",
            "description": "True if the transaction is a known double-spend.",
            "example": true
          },
          "time": {
            "type": "integer",
            "format": "int64",
            "description": "First-seen time (Unix seconds).",
            "example": 1748609400000
          },
          "block_index": {
            "type": "integer",
            "format": "int64",
            "description": "Block index containing the transaction (null if unconfirmed).",
            "example": 1
          },
          "block_height": {
            "type": "integer",
            "description": "Block height containing the transaction (null if unconfirmed).",
            "example": 851234
          },
          "inputs": {
            "type": "array",
            "description": "Transaction inputs.",
            "items": {
              "$ref": "#/components/schemas/TxInput"
            }
          },
          "out": {
            "type": "array",
            "description": "Transaction outputs.",
            "items": {
              "$ref": "#/components/schemas/TxOutput"
            }
          }
        }
      }
    }
  }
}