eth_unsubscribe - Polygon

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

The eth_unsubscribe method cancels a subscription created with eth_subscribe. The subscription will no longer send notifications after this call.

This method requires a WebSocket connection.

Parameters

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

Request

cURL

# WebSocket-only method. Use wscat (or similar) to connect first:
wscat -c 'wss://go.getblock.io/<ACCESS-TOKEN>/'

# Then send:
{"jsonrpc": "2.0", "method": "eth_unsubscribe", "params": ["0x9cef478923ff08bf67fde6c64013158d"], "id": "getblock.io"}

JavaScript (Axios)

import WebSocket from 'ws';

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

ws.on('open', () => {
    ws.send(JSON.stringify({
    "jsonrpc": "2.0",
    "method": "eth_unsubscribe",
    "params": [
        "0x9cef478923ff08bf67fde6c64013158d"
    ],
    "id": "getblock.io"
}));
});

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

Python (Requests)

import asyncio
import json
import websockets

async def main():
    async with websockets.connect('wss://go.getblock.io/<ACCESS-TOKEN>/') as ws:
        await ws.send(json.dumps({
    "jsonrpc": "2.0",
    "method": "eth_unsubscribe",
    "params": [
        "0x9cef478923ff08bf67fde6c64013158d"
    ],
    "id": "getblock.io"
}))
        async for message in ws:
            print(json.loads(message))

asyncio.run(main())

Rust (Reqwest)

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

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let (mut ws_stream, _) = connect_async("wss://go.getblock.io/<ACCESS-TOKEN>/").await?;

    let payload = json!({
        "jsonrpc": "2.0",
        "method": "eth_unsubscribe",
        "params": [
                "0x9cef478923ff08bf67fde6c64013158d"
        ],
        "id": "getblock.io"
});
    ws_stream.send(Message::Text(payload.to_string())).await?;

    while let Some(msg) = ws_stream.next().await {
        println!("{:?}", msg?);
    }
    Ok(())
}

Response

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

Response Parameters

Field	Type	Description
jsonrpc	string	JSON-RPC version (2.0)
id	string	Request identifier
result	varies	Boolean indicating success

Use Case

The eth_unsubscribe method is useful for:

• Subscription cleanup

• Resource management

Error Handling

Status Code	Error Message	Cause
403	Forbidden	Missing or invalid ACCESS-TOKEN
-32600	Invalid Request	Malformed request body
-32602	Invalid params	Invalid method parameters

Web3 Integration

Ethers.js

ethers.js

import { ethers } from 'ethers';

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

const result = await provider.send('eth_unsubscribe', ["0x9cef478923ff08bf67fde6c64013158d"]);
console.log('Result:', result);

Viem

viem.js

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

const client = createPublicClient({
    chain: polygon,
    transport: http('https://go.getblock.io/<ACCESS-TOKEN>/')
});

const result = await client.request({
    method: 'eth_unsubscribe',
    params: ["0x9cef478923ff08bf67fde6c64013158d"]
});
console.log('Result:', result);