so actually what i'am asking is that if it's possible to manually change the fees of a transaction that already has been sent to mempool ?
imagine i sent transfer with x fees and the actual fees are x+10, so i want to add that 10 to my fees tx, how can i do this ? and is it possible ?
Please explain this better because I can't make sense of "
x fees" and "
actual x+10 fees".
In bitcoin, the fee is the excess amount from the inputs and outputs, it's not something that's included in the transaction data.
Also, what they mean by "
replace" is an actual replacement of the already-broadcasted transaction, it's not a simple change of values to an existing txn.
In other words, you'll have to create a new transaction that spends a least one of its input and sign it with the necessary privKey.
Read BIP-125 for more information:
https://github.com/bitcoin/bips/blob/master/bip-0125.mediawikiTake note that some nodes do not require that "
signaling" and will accept a replacement so you can try it regardless as long as you relay it to a full-rbf node.
In your replacement transaction, you'll have to either reduce the existing output's amount (
preferably the change)
or add additional input and set the output(s) and change accordingly.