Q: transaction commission

[geopolisch]

Hi,

I just sent 0.86 BTC to one address and offered 0.001 BTC commission for the transfer fee.
Nevertheless, I do not understand how, I have been charged much more (0.0921 BTC) for the transfer fee.
Details can be seen here: https://blockchain.info/address/15sJQqE2dEGi5dLQi4MyDw5ZQ4HKzT7P3d
How is this possible that it has been charged 92x times as offered?
Thanks!

Edit:

What actually seemed to have happend is that bitcoin client has sent the "remaining" BTC to this address: 1Nu8Y6krpe31Snu7fW8TJHcAkDHKc1onQ1.

But this address is not mine, as does not appear in my wallet. That is why I'm confused.

[cp1]

Your fee was 0.001 -- the 0.0921 is your change which is always sent to a new address.  Your wallet software generated this address for you and should have its private key (you need to back that up if you haven't already).

15sJQqE2dEGi5dLQi4MyDw5ZQ4HKzT7P3d (0.9531 BTC - Output)

162HWpt9njiDsk5nwGixw7fDPuNy55Kh9X 0.86 BTC       <-- you sent the 0.86 BTC here
1Nu8Y6krpe31Snu7fW8TJHcAkDHKc1onQ1 0.0921 BTC  <-- you had more than you needed to send 0.86 and it sent the rest to this address which should be in your wallet

(bitcoin always empties your address when you send bitcoins unless you tell it not to)

[Kluge]

This isn't very intuitive, so bear with me.

When you send coins from an address, Bitcoin sends any "change" to a new address in the same wallet.

In your case, you sent .86BTC, but the address you sent from (called an "output") had .9531BTC in it.

You paid a .001BTC fee.

.9531-0.0921-.001=.0921BTC change.

The change was sent to 162HWpt9njiDsk5nwGixw7fDPuNy55Kh9X which should be an address in the same wallet you sent coins from. Thus, you should still have the .0921BTC in your wallet. Bitcoin does not record the "change" transaction in the ledger.

ETA: I'm slow.

[geopolisch]

Yes, you are right, I've got the new address in my wallet, and THE OLD ONE DISAPPEARED!! :-/

But I've got an incoming transaction to my old address!!

Any way to recover it?

Thanks!

[cp1]

What wallet do you use?  Unless you can recover the private key to your old address the bitcoins sent there are gone.   You might want to use a different wallet.

[geopolisch]

I'm using the official BTC client, that uses Qt (over windows)

[cp1]

I haven't used that one, but it should be OK.  It should have a list of about 100 addresses ready to go and it'll keep your old one in case you get new coins in it.  Make sure you backup your wallet though.

[Kluge]

Yes, you are right, I've got the new address in my wallet, and THE OLD ONE DISAPPEARED!! :-/

But I've got an incoming transaction to my old address!!

Any way to recover it?

Thanks!

A screenshot of the Bitcoin Transaction window would help. Bitcoin doesn't delete old addresses, but might hide addresses which don't have coins in them. You shouldn't have any problem receiving coins at old addresses.

[geopolisch]

Ah..... you mean it keeps this list internally?  I haven't seen it in the client, for sure. Hope you're right!

Thanks!

[geopolisch]

A screenshot of the Bitcoin Transaction window would help. Bitcoin doesn't delete old addresses, but might hide addresses which don't have coins in them. You shouldn't have any problem receiving coins at old addresses.
[/quote]

Did a copy&paste of the info the bitcoin client is showing me, translated to Ensligh:

Status: 3/non confirmed, transmit through 7 nodes
Date: 26/04/2013 07:50
To: zephyr @ bitcointalk.org 162HWpt9njiDsk5nwGixw7fDPuNy55Kh9X
Debt: -0.86 BTC
Commission: -0.001 BTC
Net: -0.861 BTC
Transaction Id: d60a39fadd551b2dae9d487dbc69f30ab9ebb46b1abd62dad75f23674bafff23

[Kluge]

Did a copy&paste of the info the bitcoin client is showing me, translated to Ensligh:

Status: 3/non confirmed, transmit through 7 nodes
Date: 26/04/2013 07:50
To: zephyr @ bitcointalk.org 162HWpt9njiDsk5nwGixw7fDPuNy55Kh9X
Debt: -0.86 BTC
Commission: -0.001 BTC
Net: -0.861 BTC
Transaction Id: d60a39fadd551b2dae9d487dbc69f30ab9ebb46b1abd62dad75f23674bafff23

So you don't see 15sJQqE2dEGi5dLQi4MyDw5ZQ4HKzT7P3d in Bitcoin's "Receive Coins" tab?

[geopolisch]

Sorry, I got confused,

Actually I can see my "old" and now "empty" address, in which I am waiting some BTCs : 15sJQqE2dEGi5dLQi4MyDw5ZQ4HKzT7P3d

But I do not see the address that received the remaining BTCs: 1Nu8Y6krpe31Snu7fW8TJHcAkDHKc1onQ1 0.0921 BTC (this doesn't appear)

Thanks!

[cp1]

That's OK, it's how bitcoin-qt does it.

[DivineOmega]

Change addresses in Bitcoin-QT and in general are something that I think is going to cause a great deal of confusion for new users and loss of bitcoins for those experimenting with brain wallets and the like.

[DannyHamilton]

Sorry, I got confused,

Actually I can see my "old" and now "empty" address, in which I am waiting some BTCs : 15sJQqE2dEGi5dLQi4MyDw5ZQ4HKzT7P3d

But I do not see the address that received the remaining BTCs: 1Nu8Y6krpe31Snu7fW8TJHcAkDHKc1onQ1 0.0921 BTC (this doesn't appear)

Thanks!

Correct.  Bitcon-Qt keeps track of "change" addresses internally and does not display them to you.