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Author Topic: Bitcoin Wallet for Android  (Read 115086 times)
BurtW
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July 07, 2013, 09:37:21 PM
 #341

Any comment on this story with respect to my Android wallet?

http://www.bbc.co.uk/news/technology-23179522

Our family was terrorized by Homeland Security.  Read all about it here:  http://www.jmwagner.com/ and http://www.burtw.com/  Any donations to help us recover from the $300,000 in legal fees and forced donations to the Federal Asset Forfeiture slush fund are greatly appreciated!
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Mike Hearn
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July 08, 2013, 09:41:01 AM
 #342

The exploit is easy to reliably detect (it can't be obfuscated) so as long as you stick to just using apps from the Play Store you'll be fine. Once security updates are issued, you can go back to installing random apps from anywhere again.
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July 09, 2013, 09:57:15 PM
 #343

Hello,

I installed Android wallet by Andreas Schildbach on a phone that does not have an SD card. Can you help me figuring out how to get the keys backup file out of the phone?

The “Export private keys” routine says it saves the backup to “/storage/emulated/0/Download/” location.
However when I browse the phone over MTP, I see no such folder. I do not have “data/data/” ether.

So, how do I get to the backup location?

Android version 4.2.2

Thanks.
Andreas Schildbach
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July 09, 2013, 10:03:14 PM
 #344

MTP already shares the "SD-card", so look for a "Download" directory.

Its probably easier to backup to your email account or Google drive. After exporting, you're getting asked to Archive and select an app for that purpose.

Bitcoin Wallet for Android: Your own Bitcoins, in your own pocket!
https://play.google.com/store/apps/details?id=de.schildbach.wallet
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July 09, 2013, 10:12:15 PM
 #345

The Download directory is there, but it got nothing except a few pdf files I downloaded through Android web browser.

I will try your other suggestion. Thank you.

Edit: Hmmm, I still need access to that folder in case I need to restore the backup, as restore does not seem to support email or Google drive, only internal/external storage.
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July 09, 2013, 10:51:18 PM
 #346

Ok, I figured it out. The issue is described here:
http://commonsware.com/blog/2011/08/31/mtp-external-storage.html

The workaround is as follows. Go to Settings – Apps – All, Media Storage, Click on “Clear cache,” then reboot the phone.
After that the bitcoin-wallet-keys backup file will show up in the “[\Internal storage]\Download” folder, via MTP.

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July 12, 2013, 09:11:04 AM
 #347

Hey, I updated and I can't set the fee anymore? Oh, it was done on purpose. Okay. Yes, there should be an option to be able to adjust it upward, even if only by a satoshi.

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Andreas Schildbach
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July 12, 2013, 09:36:04 AM
 #348

What do you want to achieve by raising the fee by one Satoshi?

Bitcoin Wallet for Android: Your own Bitcoins, in your own pocket!
https://play.google.com/store/apps/details?id=de.schildbach.wallet
2weiX
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July 13, 2013, 02:55:40 PM
 #349

requests:

- make "export to multibit" an option
AND/OR
- make "export to aes.json blockchain.info" an option
AND/OR
- make "export w/o password" an option

as well as provide a "sign clipboard contents with default address" an option.


here's why:
bought a couple of Avalon Chips from my Android wallet, now they're making me sign stuff with the address.
Means I need to jump through a bunch of hoops to be able to do that.
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July 13, 2013, 03:26:43 PM
 #350

requests:
- make "export to multibit" an option
AND/OR
- make "export to aes.json blockchain.info" an option
AND/OR
- make "export w/o password" an option

As MultiBit and Bitcoin Wallet use the same interchangable export format, MultiBit is already supported.

I think someone mentioned Blockchain.info can read that format as well, so its also supported.

Exporting without password will not be supported for security reasons.


Quote
as well as provide a "sign clipboard contents with default address" an option.

Its not top prio, but at some point I'd like to support signing and verifying as well. Can you open an enhancement request at

http://code.google.com/p/bitcoin-wallet/issues/list

Bitcoin Wallet for Android: Your own Bitcoins, in your own pocket!
https://play.google.com/store/apps/details?id=de.schildbach.wallet
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July 13, 2013, 03:34:59 PM
 #351

requests:
- make "export to multibit" an option
AND/OR
- make "export to aes.json blockchain.info" an option
AND/OR
- make "export w/o password" an option
As MultiBit and Bitcoin Wallet use the same interchangable export format, MultiBit is already supported.


urgh - just needed to rename it to ".key"
and enter the correct pwd ^^
maybe you can get the multibit guys to remove the forced naming convention when opening a file.

Exporting without password will not be supported for security reasons.
I can get behind that.

as well as provide a "sign clipboard contents with default address" an option.
Its not top prio, but at some point I'd like to support signing and verifying as well. Can you open an enhancement request at
http://code.google.com/p/bitcoin-wallet/issues/list
Uhm, yeah, sure.

^__^
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July 13, 2013, 04:27:21 PM
 #352

What do you want to achieve by raising the fee by one Satoshi?

It's still higher than the default minimum fee. When I said one Satoshi, that could also mean another 0.0001 or something similar, so now I'm paying double the default minimum fee.

Quote
Exporting without password will not be supported for security reasons.

I think it's been mentioned elsewhere in this thread, if you've got root, you can export the private key already. But people who root their phones probably know what they're doing. You might want to add an option that can only be set by root, for example, and then allow those people to set the fee as they like (zero or otherwise). This way, you still prevent newbies from doing this accidentally. A warning can also work ("warning: you are attempting to broadcast a transaction with a fee that is too low. Are you sure?")

Or something like that.

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Andreas Schildbach
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July 13, 2013, 05:03:16 PM
 #353

People who know what they're doing can compile Bitcoin Wallet from source. Feel free to do so, it's open!

If you're root on your phone you can copy the wallet and unencrypted key backups anyway. See the readme.

Back to the idea of raising the fee: What do you want to achieve? I'd like to understand the reasoning.

Bitcoin Wallet for Android: Your own Bitcoins, in your own pocket!
https://play.google.com/store/apps/details?id=de.schildbach.wallet
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July 13, 2013, 05:41:31 PM
 #354

People who know what they're doing can compile Bitcoin Wallet from source. Feel free to do so, it's open!

If you're root on your phone you can copy the wallet and unencrypted key backups anyway. See the readme.

Back to the idea of raising the fee: What do you want to achieve? I'd like to understand the reasoning.

Raising the fee by any amount gives the transaction a higher priority. Correct? Therefore, it should be confirmed faster than everything else that just gives the same standard fee or less. Even a 0.0001 increase should satisfy most miners and give them incentive to include your transaction in the next block.

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Mike Hearn
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July 13, 2013, 06:57:13 PM
 #355

But we are not even close to the 1mb size limit today so miners could also just accept your transaction without the higher fee.

Do you experience confirmation delays often?
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July 14, 2013, 12:13:25 AM
 #356

Oh, well, so far my transactions get confirmed within the next 3 or 4 blocks, sometimes 5 or 6 blocks. I've always sent with a fee except when it's not needed.

I just read about someone sending more than the minimum required fee, and for even larger transactions that is recommended for faster processing, like if you are buying chips from an asic manufacturer.

Blockchain.info sometimes displays a queue number on my transactions and an estimated time in the hours, as in estimated confirmation is 12 hours... But then it gets confirmed within the next 3 blocks, so I don't know.

BTW, this is with the bitcoin-qt client on desktop/laptop. For android, I used to just set a slightly higher fee than 0.0001. Like 0.0002.

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CommanderVenus
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July 17, 2013, 07:46:50 AM
 #357

Im using Version 3.13. Is this app downloading the blockchain to my phone to sync?

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July 17, 2013, 07:54:10 AM
 #358

Im using Version 3.13. Is this app downloading the blockchain to my phone to sync?

It only downloads a tiny fraction of the chain, just as much as it needs to provide the security of your wallet.

Bitcoin Wallet for Android: Your own Bitcoins, in your own pocket!
https://play.google.com/store/apps/details?id=de.schildbach.wallet
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July 23, 2013, 07:11:02 AM
 #359

I was just about to use it (the latest version), but on the send page, there was nowhere to input a fee amount.  It was a small transaction and I didn't want it in limbo so I used another app.  Where the heck do I type in the fee amount??

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July 23, 2013, 07:17:11 AM
 #360

Since a few weeks, the correct fee is now calculated automatically. So don't worry about your tx ending up in limbo.

Bitcoin Wallet for Android: Your own Bitcoins, in your own pocket!
https://play.google.com/store/apps/details?id=de.schildbach.wallet
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