I want to get CPFP information out of a full node—that is, ancestorsize and ancestorfees—in order to calculate the necessary fee for either CPFP, or RBF if possible.

Can I get this information through an RPC without requesting the full mempool dump?

I need this to build tools for CPFP/RBF, that are connecting to full node via RPC. But I can only find the full mempool dump, which is inefficient for this. (I don't need the full dump for one transaction information).

1 Answer 1


The answer is getmempoolentry.


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