First of all, I know the altcoin section might be more appropriate for my questions, but I have already asked my question there, but there wasn't anybody able to help me, so hopefully I'm allowed to ask for help here.

Now on to my problem! I saved a wallet with about ~1600-1700 Yacoin which is worth over 0.25 BTC. I wanted to sell these, but upon opening my wallet, I'm getting the following error:



What I've tried:

1) Deleting everything in the Yacoin folder except the wallet.dat. Same thing.
2) Use the -salvagewallet option. This resulted in the following error:



3) Pywallet. It takes a bit of fiddling to get it to work on Yacoin via the otherversion switch, but I managed to get it to work with a fresh Yacoin wallet. No success with my corrupted version It threw the following errors:

Traceback (most recent call last):
  File "C:\Users\Jaap\Desktop\pywallet.py", line 2059, in parse_wallet
    d['txIn'].append(parse_TxIn(vds))
  File "C:\Users\Jaap\Desktop\pywallet.py", line 2028, in parse_TxIn
    d['sequence'] = vds.read_uint32()
  File "C:\Users\Jaap\Desktop\pywallet.py", line 1942, in read_uint32
    def read_uint32(self): return self._read_num('<I')
  File "C:\Users\Jaap\Desktop\pywallet.py", line 1981, in _read_num
    (i,) = struct.unpack_from(format, self.input, self.read_cursor)
error: unpack_from requires a buffer of at least 4 bytes

4) I used an old Yacoin client, which I used during the time I mined those Yacoin. Didn't work either.
5) I inspected the wallet.dat with an Hex Editor. I managed to find the label of the address which holds my Yacoin and I found the address in plaintext. Looking on the Block Explorer, my Yacoin are still there.


I also managed to find a lot of instances of "63 6B 65 79 21 02" or in ASCII "ckey!.", which presumably indicates an encrypted private key follows, correct?

My main questions:
1) How long (in bytes) is the encrypted private key that follows?
2) What algorithm is used to encrypt these private keys and how can I manually decrypt these? (I know the passphrase)
3) I found 244 instances of "63 6B 65 79 21 02" or in ASCII "ckey!.". Is there any way how I can find out which of those belongs to the address which I found in plaintext in the wallet, or will I have to try them all to find the correct one?
4) Once I find the decrypted private key, I can import these via the console with importprivkey, correct?


Thank you very much in advance!

I have an old backup of a YAC wallet containing ~1600 YACoins, but the wallet seems to be corrupt. When I try to start Yacoin with the wallet.dat in the correct directory I'm getting the following error:



I'm offering 100 YAC to whoever can help me recover my ~1600 YAC.

I was wondering if it is possible to use sendmany to specify a change address. Say I want to send 1 BTC to address A while address B is the address from which the client is sending the Bitcoins (Because it's the only address in the wallet containing any BTC), which contains 5 BTC. Can I use sendmany to do the following:

Create a sendmany transaction that:
-Sends 1 BTC to A
-Sends 4 BTC to B

Because address B is the only address containing any BTC, it will use the BTC from that address as the inputs. Since the output amount equals the input amount, this leaves no unspent inputs, so the client won't send any change to a new address C.

So would this be possible? Or will I have to use raw transactions for this? I prefer not to use raw transactions if I don't have to, because of the added risks of bugs causing BTC losses.

I know that Bitcoin-qt generates new addresses to send change to, but I was wondering if this behavior is the same for Bitcoind? If it is, is it possible to disable this feature? I'd like the change to go to the same address as where it came from, so I can always check the balance of a remote wallet. I'm aware of the implications this has for my anonymity. Thank you very much in advance!

Does anyone know where I can get this? I'd like to run my own P2Pool locally (For myself to mine on, not as a public pool).
If it's not available, could one of the owners that are running a P2Pool share their source?
I would be very grateful. Thanks!

Hey there,

I'm selling 5.783473 BTB for .85 each or for .80 each if you buy them all in one go. I'd like you to send first or we can use an escrow. I'm also willing to do the transaction in smaller batches if you prefer. Let me know here or via PM if you're interested. Thanks!

Mushoz

I'm trying to sell 1188.99424661 Freicoins. Accepting BTC and LTC. Please make me some offers

Edit: Please write the offers in this thread instead of via PM, so other people can see them and outbid them if they want. Thanks!

Is it possible to run SDK 2.1 with the newest 13.1 drivers? I can't get the SDK 2.1 to install. it complains that everything is already up to date, but I uninstalled the latest SDK before trying it, so that's kinda weird. I want to use this weird combination since I use my rig both for gaming and mining, and I'm running 5 series cards, which like 2.1 best for mining.

Tips would be appreciated. Thanks!

Is it possible to see the Mtgox Euro orderbook somewhere? Because there's a 2,5% premium when Euro trades hit the USD orderbook, so I'd like to keep that to a minimum. So I'd love to see how liquid the current Euro market is on Mtgox. Thanks for the info

And now I have to include a 0.60 LTC transaction fee to be able to send it?!
That's a huge fee that I didn't see coming. Is there any way I can send it without a fee?
I'd be much better off mining at a pool with 2-3% fee if there's no way to avoid that fee.
This sucks

http://www.youtube.com/watch?feature=player_embedded&v=OMAI-OIxLPo

Awesome video, and really good cover as well. This should go Viral, IMO

Mtgox trading engine lag: 3223.98s

What the hell is going on?

I forget checking the "Save a copy in my outbox" option a lot when sending PMs, but I want to save all outgoing PMs to keep track of a lot of things. Is there a way to keep it enabled by default? If not, could this please be implemented? Thank you very much in advance

Currently there's no easy way to see if the address pool of 100 new addresses since your last backup has been used up. Bitcoin-qt currently has a backup feature build in, so wouldn't it be quite easy to implement either a counter or message that notifies the user when a new backup is needed to keep his/her funds safe? This counter could be reset each time a new backup is created inside Bitcoin-qt. Now I know some people use different/automatic backup procedures, but a simple command in the config file could disable this feature.

Thoughts/suggestions?

[Bitcoin Funded Debit Cards]

Bitcoin Funded Debit Cards

Yes, it’s entirely possible to fund your existing debit card, or credit card, with your accumulated bitcoin. And I don’t mean that you are shipped a generic, low-limit prepaid VISA or Mastercard from some anonymous reseller. I mean that you convert bitcoin online to dollars or euros and the funds are available to spend with a card that you are most likely already holding in your wallet.

[...]

Source: http://www.forbes.com/sites/jonmatonis/2012/05/07/bitcoin-funded-debit-cards/

I'm not sure if this is a bug, or intended, but the current loading bar for synchronizing isn't really informative. If I launch my client it starts at 99% as if it started with 0 blocks, and is almost done. If it is say 100 blocks behind, it should start at 0%, and increase by 1% for every 1 block downloaded in my opinion.

I was wondering why synchronizing with the blockchain is bottlenecked so badly by I/O requests? There's plenty of free RAM, and the entire blockchain could easily fit in there, yet the client is "only" using 160MB of RAM at the moment, less than 3% average CPU time and some minor network usage spikes well below my maximum throughput with a well connected client (36 active connections at the moment). Disk usage is constantly pegged to 100% usage, and the harddisk activity is easily heard. With a good internet connection, it should be entirely possible to move the bottleneck to the CPU, resulting in much better synchronizing speeds. Are there any plans on improving caching mechanics?

Alternative clients aren't very well known yet, and people wanting to try out Bitcoin could easily be put off by the bad synchronizing speeds. People wanting to give bitcoin a try would in 99% of the cases use the regular client. People wanting to give it a shot out of curiosity won't like having to wait for literally hours before it catches up, leaving them with a relatively unusable computer in the meantime, as the disk activity makes the computer respond really slow compared to having 1 core pegged to 100% CPU usage.

I really think this is an important area to improve the client in. Thoughts/comments?

Hey Zhoutong,

Thanks again for your great service! I was wondering if there are any plans to implement Stop Limit Orders?
As far as I know, they shouldn't be too hard to implement, and it will prevent stupid base prices when a spike soars
far past my trigger point. Thanks!

Place your votes :p

There seems to be some pressure up! Do you think there's going to ignite a rally here? Place your bets ladies and gentleman