POST
/
efb0a5eccd2caa5135eb54eba6f7f300
eth_getUncleCountByBlockHash
curl --request POST \
  --url https://optimism-mainnet.core.chainstack.com/efb0a5eccd2caa5135eb54eba6f7f300 \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "method": "eth_getUncleCountByBlockHash",
  "id": 1,
  "params": [
    "0x7e4aea365093a183b0df5f003f26144ef04ec8a6e7f4910356590c5fc7b1671f"
  ]
}'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}
Optimism API method that retrieves the number of uncles in a block, identified by its hash. Uncles are blocks that are not part of the main chain but are still valid and have a relation to a block on the main chain.
Get you own node endpoint todayStart for free and get your app to production levels immediately. No credit card required.You can sign up with your GitHub, X, Google, or Microsoft account.

​
Parameters

  • hash — the hash of the block for which the uncle count is being queried, as a hexadecimal string.

​
Response

  • result — the number of uncles in the specified block, encoded as a hexadecimal string. This count includes all uncles that were referenced by the block when it was mined.

​
Use case

The eth_getUncleCountByBlockHash method is useful for applications that analyze blockchain security and decentralization aspects, such as block explorers or network analysis tools. It can help these applications understand the level of block competition and the rate at which uncles are included in the blockchain.

Body

application/json

Response

200 - application/json

The uncle count of the block by hash

The response is of type object.