eth_getUncleCountByBlockNumber

Returns the number of uncles in a block from a block matching the given block hash.

This method will use 20 Compute Units.

---

Reference: Here

Parameters

1. QUANTITY|TAG - integer of a block number, or the string "latest", "earliest" or "pending", see the default block parameter

params: [
  "0xe8", // 232
]

Returns

QUANTITY - integer of the number of uncles in this block.

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

mainnet

curl https://mainnet.optimism.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getUncleCountByBlockNumber","params":["0xe8"],"id":1}'