eth_unsubscribe - zkSync

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

Cancels an existing subscription created with eth_subscribe. Like eth_subscribe, only available over WebSocket transport.

Parameters

Parameter	Type	Required	Description
subscriptionId	string	Yes	The subscription ID returned by eth_subscribe

Request Example

cURL

cURL (wscat)

# This method requires WebSocket connection
wscat -c wss://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/

> {"jsonrpc":"2.0","method":"eth_unsubscribe","params":["0x1"],"id":"getblock.io"}

Javascript

JavaScript (ws)

const WebSocket = require('ws');

const ws = new WebSocket('wss://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/');

ws.on('open', () => {
    ws.send(JSON.stringify({
        jsonrpc: '2.0',
        method: 'eth_unsubscribe',
        params: ['0x1'],
        id: 'getblock.io'
    }));
});

ws.on('message', (data) => {
    console.log(JSON.parse(data));
});

Python

Python (websockets)

import asyncio
import websockets
import json

async def unsubscribe():
    uri = "wss://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/"
    async with websockets.connect(uri) as ws:
        payload = {
            "jsonrpc": "2.0",
            "method": "eth_unsubscribe",
            "params": ["0x1"],
            "id": "getblock.io"
        }
        await ws.send(json.dumps(payload))
        response = await ws.recv()
        print(json.loads(response))

asyncio.run(unsubscribe())

Rust

Rust (tokio-tungstenite)

use tokio_tungstenite::connect_async;
use futures_util::{SinkExt, StreamExt};
use serde_json::json;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let url = "wss://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/";
    let (mut ws, _) = connect_async(url).await?;
    
    let payload = json!({
        "jsonrpc": "2.0",
        "method": "eth_unsubscribe",
        "params": ["0x1"],
        "id": "getblock.io"
    });
    
    ws.send(payload.to_string().into()).await?;
    
    if let Some(msg) = ws.next().await {
        println!("{:?}", msg?);
    }
    
    Ok(())
}

Response Example

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

Response Parameters

Field	Type	Description
result	boolean	true if the subscription was cancelled, false if it did not exist

Use Cases

• Stopping a live feed when the user navigates away

• Reconnecting subscribers after a connection drop

• Cleanup in WebSocket-based microservices

Error Handling

Status Code	Error Message	Cause
403	Forbidden	Missing or invalid <ACCESS-TOKEN>
-32602	Invalid params	Request parameters are missing or malformed
429	Too Many Requests	Rate limit exceeded for your plan
-32600	Invalid Request	eth_unsubscribe was called over HTTP; use a WebSocket connection instead

SDK Integration

zksync-ethers (JavaScript)

import { Provider } from 'zksync-ethers';

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

// zksync-ethers exposes both standard Ethereum methods and zks_* methods
// through typed accessors. For raw access:
const result = await provider.send('eth_unsubscribe', ["0x9cef478923ff08bf67fde6c64013158d"]);
console.log(result);

zksync2-python (Python)

from zksync2.module.module_builder import ZkSyncBuilder

zk_web3 = ZkSyncBuilder.build('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/')

# zksync2-python exposes the JSON-RPC layer directly.
result = zk_web3.zksync._zks_endpoints if 'eth_unsubscribe'.startswith('zks_') else None
# Or call any method generically:
result = zk_web3.provider.make_request('eth_unsubscribe', ["0x9cef478923ff08bf67fde6c64013158d"])
print(result)