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2221  Bitcoin / Electrum / Re: Brain wallet on: December 25, 2014, 11:38:07 AM
Electrum itself can be used for a secure brain wallet. All private keys in an electrum wallet are derived from a seed which can be represented as a 12 word mnemonic. This is a truly random phrase and more secure than a human generated brain wallet.
2222  Local / Other languages/locations / Re: Pakistan on: December 25, 2014, 12:46:02 AM
I am looking to buy bitcoins in Pakistan. Payment will be pay via online bank transfer or easy paisa:

Bank transfer: http://localbitcoins.com/ad/109360/cash-out-your-bitcoins-bank-transfer-pakistan
Easypaisa: http://localbitcoins.com/ad/139163/cash-out-your-bitcoins-easypaisa

All transactions will use localbitcoins escrow.
2223  Bitcoin / Bitcoin Discussion / Re: Would you like to get paid in Bitcoin? on: December 20, 2014, 08:08:20 PM
Update 4:
Just got an e-mail saying my payment went through, $500 at $317/BTC -> 1.57425774 sent to my Bitcoin address.
Next, I will convert all of my paycheck to bitcoins. I can covert BTC->USD as needed.

That is pretty awesome!
2224  Bitcoin / Project Development / Re: Bitcoin Address WordPress Plugin on: December 20, 2014, 08:00:10 PM
Hi,

Reusing addresses is bad for privacy so I created a WordPress plugin that will give your users a unique address each time they want to send you bitcoin. The plugin also maintains an address log so you can see which addresses were handed out and when.

The addresses are all generated deterministically from an electrum wallet master public key. Full instructions and download link are give here:

https://wordpress.org/plugins/bitcoin-address/



Great plugin! This is the best way to accept Bitcoin on your website. The best thing about is it that you don't have to expose your private keys on any server in order to accept payment.

Would it be possible to create some sort of variation where you could implement this into any website? Like a little script or package?

Different websites use different Content Management Systems (CMS) so I don't see how that could be done. This one is designed for WordPress CMS.
2225  Bitcoin / Development & Technical Discussion / Re: How to create a new public address using Python for an HD wallet? on: December 20, 2014, 12:26:51 PM
I searched but could not find a clear answer. Sorry in advance for terminology errors. This seems useful:

https://github.com/richardkiss/pycoin

However I'm not sure I understand how to do the following with that library:

1. Create a HD wallet (i.e. create a new Electrum wallet with seed and all that)
2. Create a new public key that is derived from that HD wallet, or from an existing wallet

My goal is to create a public address that can be presented to a customer on a website. The code will live on a remote server; I would like the public keys created to relate back to a private (offline) HD wallet.



Try this WP plugin that I released recently:

https://bitcointalk.org/index.php?topic=900327.0

It's not bip32 compatible but will work with an Electrum MPK

You can use the shortcode or, if you know how to code php, call the get_address() function in your own plugin:

Code:
global $AbdBitcoinAddress;
$address = $AbdBitcoinAddress->get_address();
2226  Bitcoin / Project Development / Re: Bitcoin Address WordPress Plugin on: December 20, 2014, 12:17:27 PM
nice plugin, ehmm, is This plugin requires electrum for online ?

You have to copy paste an electrum master public key into the plugin's settings page for it to generate addresses from that wallet. You don't have to install electrum on your web server.
2227  Bitcoin / Project Development / Bitcoin Address WordPress Plugin on: December 20, 2014, 10:33:18 AM
Hi,

Reusing addresses is bad for privacy so I created a WordPress plugin that will give your users a unique address each time they want to send you bitcoin. The plugin also maintains an address log so you can see which addresses were handed out and when.

The addresses are all generated deterministically from an electrum wallet master public key. Full instructions and download link are give here:

https://wordpress.org/plugins/bitcoin-address/

2228  Bitcoin / Electrum / Re: Confirmation Mismatch on: December 20, 2014, 10:23:07 AM
Restart electrum and it will show the correct amount of confirmations.
2229  Bitcoin / Electrum / Re: Electrum simply stopped working on: December 20, 2014, 10:22:22 AM
Delete the config file in the wallet directory. Location of directory is given here:

https://en.bitcoin.it/wiki/Electrum#Wallet_File
2230  Bitcoin / Electrum / Re: questions about Electrum servers on: December 07, 2014, 09:55:21 AM
i have a couple of Questions about Electrum servers: Huh

1. who creates and maintains these servers?

Volunteers. You can find out about them on the console tab of the electrum window.

Quote
2. why? i mean where do they get the money to do this, since Electrum is free.

Mostly they pay for it themselves. They take donations too but it doesn't amount to much: https://bitcointalk.org/index.php?topic=573951.0

Quote
3. what kind of information do i send to these servers when i connect to them?

You send all the addresses in your wallet. They then reply with the transactions involving those addresses.

Quote
4. is there any difference between the servers?

Yeah, there are limits of how many addresses you can lookup or something. That is why you have those numbers next to the server names in the server selection window.

Quote
5. is it the same as other light wallet clients like Multibit?

No, multibit doesn't rely on centralized servers. It uses bloom filters which are a clever way of asking for transactions from lots of full bitcoin nodes and building up a picture from that.
2231  Bitcoin / Electrum / Re: Empty wallet after restoring from seed on: December 01, 2014, 11:25:33 AM
I have 100% right 12 words of seed. Also I've got the same words with recognition tool from my QR-code. So I can assert that the recovery by seed is not working correctly in electrum. And I want to warn users of electrum so that they do not rely on the ability to recover the wallet in the similar case.

Regards Antony

Restore from seed works fine if you have the correct seed. Let's try again alright?

Try these steps:

- On windows 8.1 run electrum 1.9.8
- Select file menu > new/restore
- Now you will be shown a file saving dialog box so navigate to a suitable location on your hard drive (perhaps your desktop would be most convenient?) and then enter a file name for the wallet and select save.
- This will show you the new wallet creation wizard. Select "Restore an existing wallet from seed". Then enter the 12 words and follow the process to completion.

(Later when you need to open this wallet use file > open.)

What happens when you do the above steps? Do you see familiar addresses in your wallet? Please also look under receive tab > main account > used.
2232  Bitcoin / Electrum / Re: Empty wallet after restoring from seed on: December 01, 2014, 10:28:18 AM
Hello Abdussamad.

I've install electrum 1.9.8 to windows 8.1 restore wallet from seed and got the same problem empty wallet without my old addresses.
Any ideas?

Regards Anthony

The seed consists of 12 English words. Is that what you have?

If you can't restore from seed then your only option is to try and remember the password to your wallet (1.9.5 one) and, failing that, hire the wallet recover guy dave to brute force it.
2233  Bitcoin / Bitcoin Technical Support / Re: Backing up my wallets just by using their wallet.dat files on: November 30, 2014, 11:51:46 AM
For bitcoin core you should also copy the wallet folder that contains the blockchain data. Otherwise you will have to download the whole thing again and it can take days.

Also understand that bitcoin core wallet.dat backups are only good for a hundred outgoing transactions so you will have to make fresh backups regularly if you intend to restore from them in the future.
2234  Bitcoin / Electrum / Re: Not to be impolite, but has development stalled a bit? on: November 30, 2014, 11:40:52 AM
I'm just wondering because I remember reading about adding a USD exchange rate based conversion feature (e.g. tell Electrum to transfer X USD and the client will transfer X*current rate in BTC) a long time ago, but so far, it hasn't been implemented.

I continue recommending Electrum to friends as the single best lightweight client for new users (and old users as well), but it looks like there's a bit of a slow down in updates and new features.

My apologies if this sounds confrontational - it's not intended that way. I'm just trying to figure out what goes on behind the scenes, and if there's a chance I or the community can help in some way.


EDIT: Just read ThomasV's post about leaving INRIA. Good news! (although leaving INRIA must have been tough.... you must be crazy, other CS people would die to get in there Tongue). So I guess in principle, development is more of a focus now than before?

That post is from january during the heady $1000/btc days.

Development hasn't stalled. It's ongoing as you can see from the github commits:

https://github.com/spesmilo/electrum/commits/master

Thomas has said that it's taking longer than he expected:

https://bitcointalk.org/index.php?topic=427617.msg9516231#msg9516231

I think he's trying to add too many features in the next release. The more time passes the more demands are made for features to be included. For example the hardware wallet vendors have been clamoring to get support for their products in electrum.

2235  Bitcoin / Electrum / Re: Empty wallet after restoring from seed on: November 30, 2014, 11:28:04 AM
Restore from seed does work. You probably did it wrong. I can understand how confusing it might be having two different versions of electrum on the same computer. I suggest upgrading your electrum 1.9.5 version to 1.9.8 and avoiding the use of the portable version. Once you've upgrade post here and I'll tell you how you can restore from seed.

Post the name of your operating system as well.
2236  Bitcoin / Electrum / Re: Electrum not loading wallet on: November 05, 2014, 10:39:24 AM
You can use the command line to open a wallet file or the graphical interface.

Command line method:
electrum -w C:\\path\to\wallet.file

GUI method:
Run electrum on the new computer and if it asks you to create a wallet then go through the motions of doing so. Once you see the new wallet main window choose file menu > open to open your wallet.

Shortcut:
You can also create a shortcut on your desktop for your specific wallet using the command line I gave above.
2237  Bitcoin / Electrum / Re: Electrum won't open in Ubuntu on: November 04, 2014, 12:42:46 AM
Please search the forum because others have encountered this in the past. Usually deleting the config file solves it. Search the forum.
2238  Bitcoin / Electrum / Re: Going to format my PC - What to do ? on: November 04, 2014, 12:41:35 AM
Backing up the seed is important but you should also make a copy of the wallet file. The wallet file has additional things that the bare seed does not. For example labels for transactions and addresses. To backup the wallet choose 'save copy' from the 'file' menu.
2239  Bitcoin / Development & Technical Discussion / Re: Some pointers to implement HD wallet functionality on a website? on: November 04, 2014, 12:39:44 AM
I built a wordpress plugin for my website that gives this functionality:

https://bitcoinspakistan.com/bitcoin-address/

It uses the code from here:

https://github.com/prusnak/addrgen
2240  Bitcoin / Electrum / Re: Questions regarding Electrum on a server on: October 04, 2014, 01:16:46 AM
I don't know python very well but you could hire one of the electrum developers to make this for you.
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