eth_getUncleByBlockHashAndIndex - Ethereum

Shows the ‘Uncle’ and its index position after you enter the block’s hash

How to Use the eth_getUncleByBlockHashAndIndex Method


QUANTITY|TAG - the string "latest", "earliest" or "pending", or an integer block number., as it is shown in the default block parameter.

QUANTITY - the uncle's index position.

What you receive

Object - A block object with the following fields, or null when no block was found:

  • number: QUANTITY - the block number. null when its pending block.

  • hash: DATA, 32 Bytes - hash of the block. null when its pending block.

  • parentHash: DATA, 32 Bytes - the parent block’s hash.

  • nonce: DATA, 8 Bytes - hash of the generated proof-of-work. null in case its a pending block.

  • sha3Uncles: DATA, 32 Bytes - SHA3 of the uncles data.

  • logsBloom: DATA, 256 Bytes - the bloom filter for the logs in this block. returns null in case it's a pending block.

  • transactionsRoot: DATA, 32 Bytes - the root of the transaction trie.

  • stateRoot: DATA, 32 Bytes - the root of the final state trie of the block.

  • receiptsRoot: DATA, 32 Bytes - the root of the receipts trie related to this block.

  • miner: DATA, 20 Bytes - the address of the beneficiary that received the mining rewards.

  • difficulty: QUANTITY - the block’s difficulty rate.

  • totalDifficulty: QUANTITY - the total chain difficulty until this block presented as an integer. extraData: DATA - field for extra data about this block..

  • size: QUANTITY -measuring the block size in bytes.

  • gasLimit: QUANTITY - the maximum gas amount possible in this block.

  • gasUsed: QUANTITY - the total gas used for proceeding all transactions in this block.

  • timestamp: QUANTITY - the unix timestamp showing the block collation time.

  • transactions: Array consisting of transaction objects, or 32 Bytes transaction hashes that will depend on the last given parameter.

  • uncles: Array of uncle hashes.


Here is a typical appliance example.


curl<key> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getTransactionReceipt","params":["0xab059a62e22e230fe0f56d8555340a29b2e9532360368f810595453f6fdd213b"],"id"


  "jsonrpc": "2.0",
  "id": 0,
  "result": {
    "difficulty": "0xbf93da424b943",
    "extraData": "0x65746865726d696e652d657539",
    "gasLimit": "0x7a121d",
    "gasUsed": "0x79ea62",
    "hash": "0x824cce7c7c2ec6874b9fa9a9a898eb5f27cbaf3991dfa81084c3af60d1db618c",
    "logsBloom": "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",
    "miner": "0xea674fdde714fd979de3edf0f56aa9716b898ec8",
    "mixHash": "0x0b15fe0a9aa789c167b0f5ade7b72969d9f2193014cb4e98382254f60ffb2f4a",
    "nonce": "0xa212d6400b89b3f6",
    "number": "0x5bad54",
    "parentHash": "0x05e19fb68d9ec798073808e8b3170875cb327d4b6cde7d6f60fe194677bb26fd",
    "receiptsRoot": "0x90807b32c4aa4610c57289de57fa68ba50ed53f14dd2c25f1862aa049029dcd6",
    "sha3Uncles": "0xf763576c1ea6a8c61a206e16b1a2451bec5cba1c7545d7ff733a1e8c78715569",
    "size": "0x216",
    "stateRoot": "0xebc7a1603bfffe0a14bdb89f898e2f2824abb40f04579beb7b920c56d6e273c9",
    "timestamp": "0x5b54143f",
    "transactionsRoot": "0x7562cba41e067b364b933e7b566fb2444f6954fef3964a5a487d4cd79d97a56c",
    "uncles": []

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