starknet_getStateUpdate - STRK

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

This method returns the state update for a block: the storage diffs, deployed contracts, declared classes, and nonces that changed. It is used to build state-diff indexers.

Parameters

Parameter	Type	Required	Description
block_id	object | string	Yes	{block_number} or {block_hash}, or a tag ("latest", "pending")

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": "starknet_getStateUpdate",
    "params": [{ "block_number": 700000 }],
    "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: 'starknet_getStateUpdate',
    params: [{ block_number: 700000 }],
    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': 'starknet_getStateUpdate',
        'params': [{ 'block_number': 700000 }],
        '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": "starknet_getStateUpdate",
            "params": [{ "block_number": 700000 }],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;

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

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "block_hash": "0x041b10c45dc3f39372f7b9409261cac9d880c5d75a5bb077d028db20b1bd76c4",
        "old_root": "0x0525f...",
        "new_root": "0x0713a...",
        "state_diff": {
            "storage_diffs": [
                {
                    "address": "0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b1562b82f9e004dc7",
                    "storage_entries": [
                        {
                            "key": "0x0206f38f7e4f15e87567361213c28f235cccdaa1d7fd34c9db1dfe9489c6a091",
                            "value": "0x2a"
                        }
                    ]
                }
            ],
            "deployed_contracts": [],
            "declared_classes": [],
            "nonces": [
                {
                    "contract_address": "0x07c57808b9cea7130c44aab2f8ca6147b04408943b48c6d8c3c83eb8cfdd8c0b",
                    "nonce": "0x2b"
                }
            ]
        }
    }
}

Response Parameters

Parameter	Type	Description
jsonrpc	string	JSON-RPC protocol version ("2.0")
id	string	Request identifier matching the request
result	object	Roots and the state diff (see fields below)

Result Object

Field	Type	Description
new_root	string	State root after applying the block
state_diff	object	Storage diffs, deployed contracts, declared classes, and nonce changes

Use Cases

• State Indexing: Drive an indexer from per-block state diffs

• Storage Watching: Detect storage changes for specific contracts

• Nonce Tracking: Follow account nonce changes

• Proof Systems: Read old_root/new_root for verification

Error Handling

Error	Message	Description
24 / BLOCK_NOT_FOUND	Block not found	No block matches the supplied block_id
403 / RBAC: access denied	Access denied	The GetBlock access token is missing or incorrect