getmempooldescendants

POST

https://kmd.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Returns all in-mempool descendant transactions for a given transaction ID. Descendants are transactions that depend on the outputs of the specified transaction. Can return either a simple list of transaction IDs or detailed JSON objects.

Body

application/json

jsonrpcstringrequired

idstringrequired

methodstringgetmempooldescendantsrequired

paramsArray<string | boolean>required

Parameters:

txid (string, required) — Transaction ID to query descendants for.
verbose (boolean, optional) — Return JSON object if true, or list of txids if false. Default: false.

Show child attributes

One of

string

boolean

Response

200OK

Descendant transactions retrieved successfully

401Unauthorized

Unauthorized

500Internal Server Error

Internal Server Error

getmempooldescendants

curl -X POST 'https://kmd.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "1.0",
    "id": "curltest",
    "method": "getmempooldescendants",
    "params": [
      "txid_example",
      true
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://kmd.nownodes.io/");
const result = await provider.send("getmempooldescendants", [
  "txid_example",
  true
]);
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('https://kmd.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "getmempooldescendants",
  "params": [
    "txid_example",
    true
  ],
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://kmd.nownodes.io/"))
response = w3.provider.make_request("getmempooldescendants", [
  "txid_example",
  true
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://kmd.nownodes.io/"),
});

const result = await client.request({
  method: "getmempooldescendants",
  params: [
  "txid_example",
  true
],
});

console.log(result);

const endpoint = "https://kmd.nownodes.io/";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "getmempooldescendants", params: [
  "txid_example",
  true
], id: 1 });
console.log(result);

const response = await fetch('https://kmd.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "1.0",
      "id": "curltest",
      "method": "getmempooldescendants",
      "params": [
        "txid_example",
        true
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "1.0",
  "id": "curltest",
  "method": "getmempooldescendants",
  "params": [
    "txid_example",
    true
  ]
}

response = requests.post('https://kmd.nownodes.io/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://kmd.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "1.0",
    "id": "curltest",
    "method": "getmempooldescendants",
    "params": [
      "txid_example",
      true
    ]
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "jsonrpc": "1.0",
  "id": "curltest",
  "method": "getmempooldescendants",
  "params": [
    "txid_example",
    true
  ]
}

{
  "result": {
    "txid1": {
      "size": 300,
      "fee": 2000,
      "modifiedfee": 2100,
      "time": 1700000100,
      "height": 855000,
      "descendantcount": 0,
      "descendantsize": 0,
      "descendantfees": 0,
      "ancestorcount": 2,
      "ancestorsize": 600,
      "ancestorfees": 4000,
      "depends": [
        "txid_example"
      ]
    },
    "txid2": "..."
  },
  "error": null,
  "id": "curltest"
}

"Unknown API_key"

"Service is unavailable"

Documentation

How to migrate to NOWNodes

getmempooldescendants

Authorizations

Body

Response