Interesting idea. Can you open a feature request on

https://github.com/schildbach/bitcoin-wallet/issues

and maybe even propose a proper sound effect?

Yes, or you could write a mime record with a BIP70 formatted payment request if you like.

It's hard to compare it like that.

PKCS5 is used to derive an 256 bit encryption key from your password. AES is then used to encrypt your backup file.

First, make sure you're at least running version 3.45.

If you have already reset your blockchain, make sure your phone is connected to a stable WLAN and to a charger. Let it update until its up to date again. Does that cure your problem?

If you haven't reset your chain, before doing so can you send me a report through the app? It's Options > Settings > Report Issue. Please tick "Wallet dump". It will help me identify any issue.

Currently you have to install several apps in parallel. For a list of supported altcoins, see

https://github.com/schildbach/bitcoin-wallet/blob/master/wallet/README.forks

Afaik Pony is targetting PCs, not Android.

Your wallet currently cannot be encrypted. It is a planned feature. However you should know that if a malware manages to access your wallet it will also be able to sniff your password. Unlike PCs programs need root access to get to your files.

You can backup your wallet then uninstall the app. This will "forget" the keys.

The private key is created and stored on the phone only and never transmitted via any network, except in the case of an encrypted (!) wallet backup.

Android has app-private storage, so it offers a lot more protection against malicious apps/viruses than any Desktop OS does.

Generally if you don't trust what the app or your device does, consider auditing the source code. I took great care to not only open source the app, but also depend only on libraries and APIs that are open source themselves. Code audits are much appreciated!

I think a dedicated device running plain Android AOSP without any other apps can make a great and secure wallet. You can even partly run it offline, because it's possible to sign transactions and transmit them to another node just via QR code.

KnC released the source, and they also updated their terms -- although I haven't had time to re-read through it so far.

https://github.com/kncgroup/bitcoin-wallet

Version 3.36 is on the Play Store and can be downloaded from

https://github.com/schildbach/bitcoin-wallet/releases/tag/v3.36

It protects you from the 1-Satoshi spam.

That would be a bug that needs to be fixed. Are you using the latest version?

Thanks for letting me know. KnC contacted me while their fork was still in development. They assured me they'll release the source very shortly, so I'll assume they'll "play nicely" for now.

The EULA thing is indeed news to me. I'll mail them about it.

Direct payments via QR code, NFC or the payment protocol (Bluetooth or HTTPS) are implemented already. So you could start experimenting with that usecase today.

One problem is that with the app, you can't spend unconfirmed coins. That means you somehow need to get proof of confirmation (e.g. blockchain headers) to the cold storage device. Alternatively disable that check, but in this case you should not accept payments to your cold storage directly without checking on another device.

Anyway, it involves development effort. I'm currently busy with other stuff. Maybe a project for the upcoming Berlin-Texas hackathon this weekend?

See the NFC section in the README: http://bitcoin-wallet.googlecode.com/git/wallet/README

You can also consider writing a BIP70 payment request on the tag, using an NDEF message of type MIME, mime-type as defined in BIP71. If you succeed in that, let me know so I can add it to the README.

Yes. We will implement the "is standard" rules which will remove this kind of spam from the pending transactions and block it from entering the wallet in future.

This is currently happening to Bitcoin Wallet users as well:

https://plus.google.com/101256420499771441772/posts/bURxFhrKfcq

Users are almost always the wrong people to ask when it comes to technical questions.

Yes, forgotten passwords are a risk.

However, if you backup without or with a weak password, its extremely easy to leak your private keys. Backups need to be stored on public storage (the SD card aka "external memory"), otherwise you would not be able to move them to a safe place (off the device). Thus, any app can read your backup.

In future, you will be able to encrypt your wallet. This means you'll need to enter your password each time you want to sign a transaction. Thus will hopefully help to remember your password.

I suggest heading over to the bitcoinj forum and start hacking on bitcoinj. Once you have your altcoin working in wallet-tool, you can start to adapt Bitcoin Wallet. Also take a look at the other altcoins (Litecoin etc.) as they have been through this process mostly.

https://www.eventbrite.com/e/berlin-texas-bitcoin-hackathon-decentralise-everything-tickets-10509228385


The Berlin, Texas Hackathon

2014 is the year bringing us the next wave of free and decentralised systems in form of application-layers on top of the Bitcoin blockchain, opening the door to the next-generation financial and economic system.

This economic system is developed not by governments, banks or corporations but by people for people. Community hackathons have always been catalyst events, driving the development of Bitcoin further. So will the Hackathon organised by the Texan Bitcoin Conference, giving out more than 1 Mio USD in rewards for the participants.

In order to recruit contestants from the brilliant Berlin crypto-scene (or elsewhere) and allow them to join the Texan challenge the Berlin Bitcoin community is organising a pre-hackathon in Berlin, whose winners will be rewarded the trip to Texas, so they can bring some of that money and glory home.

The Berlin, Texas Hackathon will take place from February 21st to February 23nd in Berlin and we invite anyone to join, brainstorm, develop and share ideas, hack code, hack code and hack code. Or just hack, hack and hack. Anything you want.

The event will take place on the infamous c-base space station in Berlin Mitte. We'll start on Friday night around 7 pm and hack for 40 hours. Final demos will be held on Sunday afternoon. We'll then move down to room77 and the Bitcoinkiez for a final party. Hackers gotta party, after all.

Food and drinks will be provided throughout the whole meeting. This is a non-smoking event and sleeping zones are not provided, unless you decide to use yor keyboard as a cushion.

And last but not least, we'd like to thank our sponsor UFOstart. After all, they'll pay for the flights to send y'all to Texas.

To blockchain eternity!

Did you unpack the Android SDK and use "tools/android update sdk --no-ui --force --filter platform,platform-tools"?