kaia_getCommittee - Kaia

Example code for the kaia_getCommittee JSON RPC method. Complete guide on how to use kaia_getCommittee JSON RPC in GetBlock Web3 documentation.

This method returns the addresses of the validators selected as the committee for a given block. The committee is the subset of the council responsible for reaching consensus on that block.

Parameters

Parameter	Type	Required	Description
block	string	No	Block number in hex, or "latest". Defaults to the latest block

Request

cURL

curl --location --request POST 'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "kaia_getCommittee",
    "params": ["0x1b4"],
    "id": "getblock.io"
}'

Axios

example.js

const axios = require('axios');

const response = await axios.post('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/', {
    jsonrpc: '2.0',
    method: 'kaia_getCommittee',
    params: ["0x1b4"],
    id: 'getblock.io'
}, {
    headers: { 'Content-Type': 'application/json' }
});

console.log(response.data.result);

Request

example.py

import requests

response = requests.post(
    'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'kaia_getCommittee',
        'params': ["0x1b4"],
        'id': 'getblock.io'
    }
)

print(response.json())

Rust

example.rs

use reqwest::Client;
use serde_json::{json, Value};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let response = client
        .post("https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "kaia_getCommittee",
            "params": ["0x1b4"],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;

    println!("Result: {}", response["result"]);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": [
        "0x571e53df607be97431a5bbefca1dffe5aef56f4d",
        "0x5cb1a7dccbd0dc446e3640898ede8820368554c8"
    ]
}

Response Parameters

Parameter	Type	Description
jsonrpc	string	JSON-RPC protocol version ("2.0")
id	string	Request identifier matching the request
result	array	Array of validator addresses in the committee for the block

Use Cases

• Consensus Analysis: Read the committee that finalized a block

• Validator Participation: Track how often a validator is on the committee

• Fault Analysis: Investigate consensus behavior for a block

• Explorer Detail: Show the committee on a block page

Error Handling

Error Code	Message	Description
-32602	Invalid params	A parameter is missing or has the wrong type or format
-32000	Not found	The account or block does not exist in the requested state
-32603	Internal error	The node failed to process the request

Web3 Integration

Ethers.js

ethers-example.js

const { ethers } = require('ethers');

const provider = new ethers.JsonRpcProvider('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/');

const committee = await provider.send('kaia_getCommittee', ['0x1b4']);
console.log(committee);

Viem

viem-example.js

import { createPublicClient, http } from 'viem';
import { kaia } from 'viem/chains';

const client = createPublicClient({ chain: kaia, transport: http('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/') });

const committee = await client.request({
    method: 'kaia_getCommittee',
    params: ['0x1b4']
});
console.log(committee);