eth_getUncleCountByBlockNumber

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

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_getUncleCountByBlockNumber",
  "params": [
    "0x1b4"
  ]
}

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

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": "0x0"
}

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

Parameters

string

required

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

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",
  "method": "eth_getUncleCountByBlockNumber",
  "params": [
    "0x1b4"
  ]
}

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

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": "0x0"
}

Code	Message	Description
-32602	Invalid block parameter	The provided block parameter is invalid
4100	Requested method not supported	The 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.