getmempoolancestors

POST

https://bsv.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Returns all in-mempool ancestor transactions for a given transaction ID. An ancestor is a transaction whose outputs are used as inputs in another transaction. You can get a summary or detailed object output.

Body

application/json

jsonrpcstringrequired

idstringrequired

methodstringgetmempoolancestorsrequired

paramsArray<string | boolean>required

Parameters:

txid (string, required) — Transaction ID to query.
verbose (boolean, optional) — Whether to return a JSON object or just an array of txids. Default is false.

Show child attributes

One of

string

boolean

Response

200OK

Ancestor transaction(s) retrieved successfully

401Unauthorized

Unauthorized

500Internal Server Error

Internal Server Error

getmempoolancestors

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

import { JsonRpcProvider } from "ethers";

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

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

uri = URI('https://bsv.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "getmempoolancestors",
  "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://bsv.nownodes.io/"))
response = w3.provider.make_request("getmempoolancestors", [
  "txid_example",
  true
])
print(response)

import { createPublicClient, http } from "viem";

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

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

console.log(result);

const endpoint = "https://bsv.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: "getmempoolancestors", params: [
  "txid_example",
  true
], id: 1 });
console.log(result);

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

const data = await response.json();

import requests

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

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

require 'net/http'
require 'json'

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

{
  "result": {
    "txid1": {
      "size": 250,
      "fee": 1000,
      "modifiedfee": 1000,
      "time": 1700000000,
      "height": 854998,
      "descendantcount": 1,
      "descendantsize": 600,
      "descendantfees": 3000,
      "ancestorcount": 1,
      "ancestorsize": 250,
      "ancestorfees": 1000,
      "depends": []
    },
    "txid2": "..."
  },
  "error": null,
  "id": "curltest"
}

"Unknown API_key"

"Service is unavailable"

Documentation

How to migrate to NOWNodes

getmempoolancestors

Authorizations

Body

Response