On this state of affairs, the transaction is being conflicted by one other transaction which is inadequate to interchange it by itself, however sufficient to interchange it when submitted with the kid.
testmempoolaccept
assessments every transaction individually, although a number of are offered on the identical time. Thus the father or mother and its little one aren’t evaluated collectively as a single package deal, and since neither shall be accepted individually, a failure is returned.
Nonetheless, submitpackage
is explicitly an RPC to judge transactions submitted collectively as a package deal. Thus it does consider the father or mother and its little one as a package deal, and since the package deal is sufficient to exchange the unique transaction, each txs are accepted efficiently.