eth_getFinalizedHeader returns "21 out of range [1,8]" error

[quick-pawiromitchel]

System information

Geth version: Geth/v1.4.15-ec318b9c/linux-amd64/go1.21.13

Expected behaviour

Correct response

Actual behaviour

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32000,
    "message": "21 out of range [1,8]"
  }
}

Steps to reproduce the behaviour

Run the payload { "jsonrpc": "2.0", "method": "eth_getFinalizedHeader", "params": [21], "id": 1 }

Backtrace

WARN [01-26|13:44:40.193] Served eth_getFinalizedHeader            conn=xxx.xxx.xxx.xxx:54747 reqid=1 t="43.173µs" err="21 out of range [1,8]" X-Forwarded-For=<nil>
WARN [01-26|13:44:40.193] Served eth_getFinalizedHeader            conn=xxx.xxx.xxx.xxx:54747 reqid=1 duration="42.271µs" err="21 out of range [1,8]"

[MatusKysel]

Hey @quick-pawiromitchel where did you test it? it seems in your case there is only 8 validators for latest block

[quick-pawiromitchel]

We're running our own BSC Testnet nodes

it seems in your case there is only 8 validators for latest block

Can you clarify this a bit more? Do we need more nodes for the call to work?

[MatusKysel]

So you are calling it with param 21, but it seems you have only 8 validators. So call the same API with value 8 and it should work

[MatusKysel]

@quick-pawiromitchel you can check number of validators e.g. here https://testnet.bscscan.com/validators Please let me know if it's working for you