releaseMempool - Cardano

Example code for the releaseMempool WebSocket method. Complete guide on how to use releaseMempool WebSocket in GetBlock Web3 documentation.

This method releases the acquired mempool snapshot, freeing the node to update its mempool view. This protocol requires a WebSocket connection.

Parameters

This method does not require parameters.

Request

JavaScript

example.js

import WebSocket from 'ws';

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

client.once('open', () => {
    client.send(JSON.stringify({"jsonrpc": "2.0", "method": "releaseMempool", "id": "getblock.io"}));
});

client.on('message', (msg) => {
    console.log(JSON.parse(msg.toString()));
    client.close();
});

Python

example.py

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": "releaseMempool", "id": "getblock.io"}))
        print(json.loads(await ws.recv()))

asyncio.run(main())

Response

{
    "jsonrpc": "2.0",
    "method": "releaseMempool",
    "result": {
        "released": "mempool"
    },
    "id": "getblock.io"
}

Response Parameters

Field	Type	Description
released	string	Confirmation that the mempool snapshot was released

Use Cases

• Resource Cleanup: Release a snapshot when inspection completes

• Snapshot Cycling: Release before acquiring a fresh snapshot

• Long Sessions: Manage mempool snapshots over a persistent connection

• Error Recovery: Reset mempool state after a failed query sequence

Error Handling

Error Code	Message	Description
-32602	Invalid params	The request is malformed for the current protocol state
4000	Must acquire mempool	A snapshot must be acquired before this request
-32603	Internal error	The node failed to answer the mempool request