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eth_getUncleByBlockNumberAndIndex

Returns information about a uncle of a block given the block number and the uncle index position.

Parameters​

  • block parameter: [Required] A hexadecimal block number, or one of the string tags latest, earliest, pending, safe, or finalized. See the default block parameter.
  • uncle index position: [Required] A hexadecimal equivalent of the integer indicating the uncle's index position.

Returns​

A block object, or null when no block was found. The block object returned will consist of the following keys and their values:

  • number: The block number. Null when the returned block is the pending block.
  • hash: 32 bytes. Hash of the block. Null when its pending block.
  • parentHash: 32 bytes. Hash of the parent block.
  • nonce: 8 bytes. Hash of the generated proof-of-work. Null when the returned block is the pending block.
  • sha3Uncles: 32 bytes. The SHA3 of the uncles data in the block.
  • logsBloom: 256 bytes. The Bloom filter for the logs of the block. Null when the returned block is the pending block.
  • transactionsRoot: 32 bytes. The root of the transaction trie of the block.
  • stateRoot: 32 bytes. The root of the final state trie of the block.
  • receiptsRoot: 32 bytes. The root of the receipts trie of the block.
  • miner: 20 bytes. The address of the beneficiary to whom the mining rewards were given.
  • difficulty: The hexadecimal of the difficulty for this block.
  • totalDifficulty: The hexadecimal of the total difficulty of the chain until this block.
  • extraData: The "extra data" field of this block.
  • size: The hexadecimal of the size of this block in bytes.
  • gasLimit: Maximum gas allowed in this block.
  • gasUsed: Total used gas by all transactions in this block.
  • timestamp: The unix timestamp for when the block was collated.
  • uncles: (Array). An array of uncle hashes.
note

An uncle doesn't contain individual transactions.

Example​

Replace YOUR-API-KEY with an API key from your Infura dashboard.

Request​

curl https://mainnet.infura.io/v3/YOUR-API-KEY \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_getUncleByBlockNumberAndIndex","params": ["0x29c","0x0"],"id":1}'

Response​

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "difficulty": "0x57f117f5c",
    "extraData": "0x476574682f76312e302e302f77696e646f77732f676f312e342e32",
    "gasLimit": "0x1388",
    "gasUsed": "0x0",
    "hash": "0x932bdf904546a2287a2c9b2ede37925f698a7657484b172d4e5184f80bdd464d",
    "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "miner": "0x5bf5e9cf9b456d6591073513de7fd69a9bef04bc",
    "mixHash": "0x4500aa4ee2b3044a155252e35273770edeb2ab6f8cb19ca8e732771484462169",
    "nonce": "0x24732773618192ac",
    "number": "0x299",
    "parentHash": "0xa779859b1ee558258b7008bbabff272280136c5dd3eb3ea3bfa8f6ae03bf91e5",
    "receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
    "size": "0x21d",
    "stateRoot": "0x2604fbf5183f5360da249b51f1b9f1e0f315d2ff3ffa1a4143ff221ad9ca1fec",
    "timestamp": "0x55ba4827",
    "totalDifficulty": null,
    "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "uncles": []
  }
}
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