get_txpool_backlog - Monero

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

This method returns the current backlog of transactions in the mempool, including projected confirmation times.

Parameters

None

Request Example

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "get_txpool_backlog",
    "params": {},
    "id": "getblock.io"
}'

import requests
import json

url = "https://go.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "get_txpool_backlog",
    "params": {},
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)

use reqwest::Client;
use serde_json::json;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let payload = json!({
        "jsonrpc": "2.0",
        "method": "get_txpool_backlog",
        "params": {},
        "id": "getblock.io"
});

    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&payload)
        .send()
        .await?;

    let result: serde_json::Value = response.json().await?;
    println!("{:#?}", result);

    Ok(())
}

Response Example

{
    "id": "getblock.io",
    "jsonrpc": "2.0",
    "result": {
        "backlog": [
            {
                "blob_size": 1500,
                "fee": 100000000,
                "time_in_pool": 60,
                "weight": 1500
            }
        ],
        "status": "OK",
        "untrusted": false
    }
}

Response Parameters

Field

Type

Description

result.backlog

array

Array of mempool transactions

result.backlog[].blob_size

unsigned int

Serialized transaction size in bytes

result.backlog[].weight

unsigned int

Transaction weight (used for fee calculation)

result.backlog[].fee

unsigned int

Transaction fee in atomic units

result.backlog[].time_in_pool

unsigned int

Seconds the transaction has been in the pool

Use Cases

Mempool congestion monitoring
Fee oracle inputs
Wallet UX showing confirmation-time estimates

Error Handling

Status Code

Error Message

Cause

403

Forbidden

Missing or invalid <ACCESS-TOKEN>

429

Too Many Requests

Rate limit exceeded for your plan

SDK Integration

import monerojs from 'monero-javascript';

const daemon = await monerojs.connectToDaemonRpc('https://go.getblock.io/<ACCESS-TOKEN>/');

// Most methods are exposed directly on the daemon client. For raw access:
const result = await daemon.getDaemonConnection().sendJsonRequest('get_txpool_backlog', {});
console.log(result);

from monero.backends.jsonrpc import JSONRPCDaemon
from monero.daemon import Daemon

backend = JSONRPCDaemon(host='go.getblock.io', port=443, path='/<ACCESS-TOKEN>/', protocol='https')
daemon = Daemon(backend)

# For methods covered by the typed API, use the daemon attribute directly.
# For raw RPC access:
result = backend.raw_request('get_txpool_backlog', {})
print(result)

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