{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_getUncleCountByBlockNumber",
  "params": [
    "latest"
  ]
}

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

Defined in the Ethereum JSON-RPC Specification

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

​
Parameters

​
blockParameter
string
required

Integer block number, or the string “latest”, “earliest” or “pending”.

​
Returns

​
result
string

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

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_getUncleCountByBlockNumber",
  "params": [
    "latest"
  ]
}

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

​
Error Handling

CodeMessageDescription
-32602Invalid block parameterThe provided block parameter 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 number.