{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_getUncleCountByBlockHash",
  "params": [
    "0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b"
  ]
}

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": "0x1"
}

Defined in the Ethereum JSON-RPC Specification

Returns the number of uncles in a block by block hash.

​
Parameters

​
blockHash
string
required

Hash of a block (32 bytes).

​
Returns

​
result
string

The number of uncles in this block as a hexadecimal string.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_getUncleCountByBlockHash",
  "params": [
    "0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b"
  ]
}

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": "0x1"
}

​
Error Handling

CodeMessageDescription
-32602Invalid block hashThe provided block hash is invalid
4100Requested method not supportedThe method is not supported by the wallet

Uncle blocks are blocks that were mined but not included in the main blockchain. This method returns their count for a specific block.