eth_unsubscribe - Arbitrum Nova

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

This method cancels an active WebSocket subscription by its ID and stops further notifications for that subscription.

This method works only over a WebSocket connection. Use the wss:// form of the endpoint (wss://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/) rather than HTTPS.

Parameters

Parameter	Type	Required	Description
subscriptionId	string	Yes	Subscription ID returned by eth_subscribe

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": "eth_unsubscribe",
    "params": ["0x9cef478923ff08bf67fde6c64013158d"],
    "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: 'eth_unsubscribe',
    params: ['0x9cef478923ff08bf67fde6c64013158d'],
    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': 'eth_unsubscribe',
        'params': ['0x9cef478923ff08bf67fde6c64013158d'],
        '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": "eth_unsubscribe",
            "params": ["0x9cef478923ff08bf67fde6c64013158d"],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;

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

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": true
}

Response Parameters

Parameter	Type	Description
jsonrpc	string	JSON-RPC protocol version ("2.0")
id	string	Request identifier matching the request
result	boolean	true if the subscription existed and was cancelled

Use Cases

• Stream Teardown: Stop a subscription when a consumer disconnects

• Resource Cleanup: Release server-side subscription state

• Subscription Rotation: Cancel and re-create subscriptions with new filters

• Graceful Shutdown: Close subscriptions cleanly on service stop

Error Handling

Error Code	Message	Description
-32602	Invalid params	Malformed or unknown subscription ID
-32601	Method not found	The endpoint was called over HTTP instead of WebSocket

Web3 Integration

Ethers.js

ethers-example.js

import { ethers } from 'ethers';

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

// ethers v6: provider.destroy() closes the socket and all subscriptions
await provider.destroy();

Viem

viem-example.js

import { createPublicClient, http } from 'viem';

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

// viem: call the unwatch function returned by watchBlocks/watchEvent
unwatch();