getmempoolancestors - Bitcoin RPC

getmempoolancestors txid (verbose)

If txid is in the mempool, returns all in-mempool ancestors.

Arguments:
1. "txid"                 (string, required) The transaction id (must be in mempool)
2. verbose                  (boolean, optional, default=false) True for a json object, false for array of transaction ids

Result (for verbose=false):
[                       (json array of strings)
  "transactionid"           (string) The transaction id of an in-mempool ancestor transaction
  ,...
]

Result (for verbose=true):
{                           (json object)
  "transactionid" : {       (json object)
    "size" : n,             (numeric) virtual transaction size as defined in BIP 141. This is different from actual serialized size for witness transactions as witness data is discounted.
    "fee" : n,              (numeric) transaction fee in BTC
    "modifiedfee" : n,      (numeric) transaction fee with fee deltas used for mining priority
    "time" : n,             (numeric) local time transaction entered pool in seconds since 1 Jan 1970 GMT
    "height" : n,           (numeric) block height when transaction entered pool
    "descendantcount" : n,  (numeric) number of in-mempool descendant transactions (including this one)
    "descendantsize" : n,   (numeric) virtual transaction size of in-mempool descendants (including this one)
    "descendantfees" : n,   (numeric) modified fees (see above) of in-mempool descendants (including this one)
    "ancestorcount" : n,    (numeric) number of in-mempool ancestor transactions (including this one)
    "ancestorsize" : n,     (numeric) virtual transaction size of in-mempool ancestors (including this one)
    "ancestorfees" : n,     (numeric) modified fees (see above) of in-mempool ancestors (including this one)
    "wtxid" : hash,         (string) hash of serialized transaction, including witness data
    "depends" : [           (array) unconfirmed transactions used as inputs for this transaction
        "transactionid",    (string) parent transaction id
       ... ]
  }, ...
}

Examples:
> bitcoin-cli getmempoolancestors "mytxid"
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getmempoolancestors", "params": ["mytxid"] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/

          

This is a website, created out of frustration with uncomplete and outdated Bitcoin Core RPC documentation online.

It was inspired by ChainQuery, which seems to be abandoned. These docs are even simplier, so they can be regenerated by anyone.

Made by @karel_3d; license of the docs is MIT (see bitcoin repo), license of the scripts and webpage is also MIT ((C) 2018 Karel Bilek) (github repo)

Bitcoin version: 0.16.0.

Note that the RPC is from a regtest node (for completeness), so it includes some additional calls that a regular node doesn't have.