hello, I have a question about how to cancel a transaction which already commited to mempool but not confirmed?
if there is no way or tool to cancel a tx, is it need to develop one?
If you use a wallet that supports the RBF feature, you can cancel transactions that have been broadcast to your own address by increasing the fees. Apart from that, to speed up transactions, you can also use the RBF feature to increase transaction fees. To be able to do this, you must have remaining bitcoins in your wallet, otherwise you cannot do it