Getmempoolancestors

getmempoolancestors operations.

getmempoolancestors

post

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.

Authorizations

api-keyAuth

api-keystringRequired

NOWNodes API key passed in the api-key header.

Body

application/json

Request payload containing the documented method parameters and client request identifier.

jsonrpcstringRequired

JSON-RPC protocol version.

Example: 1.0

idstringRequired

Client-provided request identifier echoed in the response.

Example: curltest

methodstring · enumRequired

JSON-RPC method name.

Example: getmempoolancestorsPossible values:

Responses

200

Ancestor transaction(s) retrieved successfully

application/json

Object containing getmempoolancestors response details.

errorone of · nullableRequired

JSON-RPC error object or null on success.

or

stringOptional

JSON-RPC error object. Null when the request succeeds.

Example: {"code":-28,"message":"Service temporarily unavailable"}

idone of · nullableRequired

Request id echoed by the server.

stringOptional

Client-provided request identifier echoed in the response.

Example: curltest

or

integerOptional

Client-provided request identifier echoed in the response.

Example: curltest

Other propertiesanyOptional

401

Unauthorized: API key is present but rejected by the NOWNodes gateway.

text/plain

405

Method Not Allowed. Returned by the NOWNodes gateway for malformed or unsupported gateway-level requests.

text/plain

422

Missing API key. The NOWNodes gateway returns plain text for this error.

text/plain

500

Internal Server Error

application/json

post/

HTTPcURLJavaScriptPython

POST / HTTP/1.1
Host: btc-testnet.nownodes.io
api-key: YOUR_API_KEY
Content-Type: application/json
Accept: */*
Content-Length: 95

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

{
  "result": {
    "c28bfec8d3707d83615393416fc7b4d6cb35be8da8426c7c64b6be60492cc676": {
      "vsize": 141,
      "weight": 561,
      "time": 1770000000,
      "height": 956047,
      "descendantcount": 1,
      "descendantsize": 141,
      "ancestorcount": 1,
      "ancestorsize": 141,
      "wtxid": "9f0c6c9d98f1d25f8b7d4e8c3a2b1f0e1234567890abcdef1234567890abcdef",
      "fees": {
        "base": 0.0000141,
        "modified": 0.0000141,
        "ancestor": 0.0000141,
        "descendant": 0.0000141
      },
      "depends": [],
      "spentby": [],
      "bip125-replaceable": false,
      "unbroadcast": false
    }
  },
  "error": null,
  "id": 1
}