That is why I'm asking you to set fees to dynamic before trying CPFP again. You have a max fee configured which is why it is giving you that error. You must change that. See my post above (#6).

This. When you use a software wallet like electrum then it'll handle change for you and you don't have to worry about it. Change is only a problem for paper wallet users or those who muckabout with private keys directly.

Since you've asked I'll answer your other questions too:


The generic term for fine grained control over the inputs and outputs of a transaction is called "coin control". Electrum allows you to determine which inputs form a transaction but does not allow you to select where the change goes. Bitcoin Core allows you to do both.

What electrum does allow you to do is specify whether you want to use separate change addresses, which is good for privacy, or send change back to one of the originating addresses. So if you go to tools > preferences > transactions tab you can select to use change addresses or not.


Electrum on tails is an old version so I don't recommend using it. You should use a debian live cd and install the latest electrum on to that. Yes you can do that. The instructions for installing electrum on ubuntu/debian are on the download page of the electrum site.


BTW you've called electrum an online wallet. What do you mean by that? Electrum is not a web wallet or a wallet provided to you by some centralized entity. You control the private keys and they only exist on your own devices.

Yes you can try fixing the tablet and seeing if your wallet is there.

Under tools > preferences check "Use dynamic fees" and then try CPFP again. You have set a max static fee in there which is why it is not working. Static fees are not longer practical. Market based dynamic fees are the way to go.

When the CPFP window displays your transaction details click on "sign" and then "broadcast"

Also under preferences select "Always" for "Propose replace by fee"

It isn't possible to brute force a seed.

Now as to why we use English words it is so that we can write it down easily. The seed is actually a really large random number that gets encoded as English words so we humans can write it down with our meaty hands. You could just as easily represent it as a hexadecimal number or base64 or some other encoding. It just wouldn't be very user friendly.

you can ignore it or right click on the request on the receive tab and delete it.

If ismine is saying false then the address does not belong to this wallet. Do you have some other wallet? Maybe on electrum or maybe on some other software/website?

Your guys are overcomplicating it. No one expects the user to calculate fees manually. The CPFP window displays a slider that you use to fine tune the fee. That's it. You don't have to do anything more. Also FYI that fee setting in the CPFP window takes into account both transactions.

both sender and receiver can do it. you can always do it if you are the receiver. you can do it if you are the sender and some change was sent back to a change address in your wallet (most txs have change).

To do it in electrum follow this guide:

https://bitcointalk.org/index.php?topic=1916963.msg19015496#msg19015496

what version of electrum are you using?

are any of your addresses frozen? bring the addresses tab into view with ctrl+a if it isn't visible. then see if any of the addresses have a cyan background

Do this:

https://bitcointalk.org/index.php?topic=1916963.msg19015496#msg19015496

those steps are for fetching the gpg key but the software you used already did that for you:

You have to create a new wallet. That is a completely new set of addresses and a different seed. Electrum just isn't designed for massive wallets. After you have properly created the new wallet, including noting  down its seed, you should send your money from the old wallet to the new one.

You can create a new wallet using file > new/restore. You can open specific wallets using file > open or the command line switch -w

you should upgrade to the latest electrum version and enable dynamic fees under tools menu > preferences or this will keep happening.

By console he means the console tab of the electrum window. Maybe he didn't see that you were using android. Is there a console tab in the android version of electrum?

Unfortunately I'm not familiar with the android version of electrum so would you be willing to install electrum on a PC and then restoring from seed there? Alternatively just see if the address 1AD is listed in your android installation of electrum. That's the idea behind the whole ismine command - to determine whether that address is in your electrum wallet.

As long a you have the seed you should be able to restore your wallet on any device. Don't repair the tablet just yet. Don't dispose of it in case you need it.

BTW it's great that you to mentioned details like your electrum version and your OS. Almost no one does it when asking questions here and we have to waste our time specifically asking them for this basic info. So it's good that you did it.

upgrade to 2.8.2. set dynamic fees and select always for "propose replace by fee"

you should upgrade to the latest electrum version to prevent this sort of thing happening again. there have been many bug fixes related to transaction fees.

gtk

That's because you are using an old version of electrum. If you don't update you will continue to face problems. Please update.