Bitcoin Forum

Avevo letto pure io qualcosa in merito all'uso di android per tenere sotto controllo la miniera, a quanto vedo funziona veramente... Chi ha avuto esperienze pratico-personali?

Per controllare le miniere ce ne sono una marea, più che altro la discussione puntava sull'uso dei Bitcoin trammite mobile.

Beh si può altrimenti usare questo:
https://market.android.com/details?id=net.lwi.bitcoiner

Praticamente è un interfaccia per collegarsi in remoto con il Bitcoin a casa.
L'ultima release però è del 18 maggio, non so se sia un progetto morto ...

Naturalmente fate attenzione quando usare questi programmi ;)

Riguardo a quello che si piazza su Google docs, non ho provato quindi non posso assicurartelo.
Tanto più che farei attenzione ad usare lo stesso wallet in contemporanea, non si sa mai che qualcosa vada storto.
Magari funziona, ma ci darei un occhio in più ...

c'è la possibilità di usare lo stesso wallet del client pc? alla fine sta su google doc no?

Da quel che ho capito leggendo l'altro giorno un po' di documentazione, no. Su Google dovrebbe starci solo un backup. Però forse ho capito male.

Comunque il codice è su GitHub, se vuoi darci un'occhiata...

Il problema è già stato sollevato e riguarda l'uso di banda per avere l'intera catena dei blocchi. Io ho un pc fisso con una connessione adsl mobile (chiavetta) a volume quindi mi sono accorto che il client bitcoin è esoso per quanto riguarda la banda (volume di dati scaricati).

Il Mobile ha lo stesso mio problema in quanto il mio contratto con un operatore mobile è molto utilizzato sugli smartphone.

Il problema maggiore è poi che il consumo di banda non termina dopo avere scaricato la block chain ma prosegue ininterrottamente fin quando il programma è aperto in quanto si scambiano dati con altri nodi del p2p senza alcuna limitazione.

Questo è quello che mi pare di avere capito è il maggiore limite del client bitcoin sul mobile.

va beh, se di tanto in tanto si aggiornano i blocchi in wifi, credo si possa anche usare.. alla fin fine al momento dell'utilizzo scaricherebbe solo gli ultimi blocchi.. inoltre ricordiamoci che è già stato preventivato un update che permette di scaricare solo i blocchi necessari e non tutti.

Se fosse così andrebbe bene ma il programma non si limita a scaricare ma esegue anche l'upload continuamente, questo è quel che ho capito e che mi pare faccia il programma. Infatti le mie spie della mia connessione a Internet per il download e per l'upload rimangano continuamente accese dopo che tutto il block chain è stato scaricato: mi sbaglio?

Se è così occorre aprire il programma, fare aspettare che i blocchi nuovi siano scaricati e poi eseguire la transazione monetaria con i bitcoin e quindi chiudere il programma. In questo tempo il client scarica e fa l'upload in continuazione.

Per fare una singola operazione con i bitcoin è facile se ne vadano via 50 megabyte. Per chi ha un tetto massimo di 1 GB mensile è molto.

- Aggiunto l'Armory client, attenzione che questo sembra potente :D ( deve ancora uscire ... )

Ho letto ora quello nuovo, che non mi era stato segnalato ...
Ti avevo anche risposto, e aspettavo infatti una nuova replica da te. ( neanche tu hai ricevuto la risposta? )
Direi che il sistema dei PM del forum è saltato :P

I'm proud to announce version 2.41 of Bitcoin Wallet.

The changes are mostly under the hood, but some of them are massive:

• Seriously reduced bandwidth and CPU usage due to usage of bloom filters on peer connections
• Faster connection setup to peers
• Ability to spend your own change instantly, without waiting for confirmation
• No need to manually disconnect any more for any of the preferences
• Preference for showing the connectivity indicator
• Shortcut to request coins by long tapping on QR code
• Enhanced Peer monitor to show more info about peers, e.g. hostname
• Fallback for fetching exchange rates (bitcoincharts first, then blockchain)
• Lots of small improvements and bugfixes
• Based on bitcoinj 0.7

The bloom filter feature depends on seeing at least one bitcoin-qt/bitcoind 0.8.0 (protocol version 70000+) to download blocks from. As of today, the chance for this is roughly 50% and will increase as the new version spreads. If you want to help, update your bitcoin-qt now.

Download/update from Google Play:
https://play.google.com/store/apps/details?id=de.schildbach.wallet

Direct download:
https://code.google.com/p/bitcoin-wallet/downloads/list

Source:
https://code.google.com/p/bitcoin-wallet/source/checkout


Thanks to everyone who contributed to Bitcoin Wallet and bitcoinj. Mike Hearn and Matt Corallo earn extra hugs for making bloom filters a reality!

Electrum 1.7 Released

After a few months of hard work we are proud to announce Electrum 1.7. A lot has changed both the inside and outside of the application. Let me run through the list.

Plugin support
The classic gui can now be extended with plugins. Developers who want to add new features to Electrum or let Electrum interface to third-party services are now welcome to do so. Some core functionality in 1.6 and lower has now been refactored into a plugin.

Electrum ships with the following plugins by default.

• Alias - Retrieve aliases using http.
• Label sync - Syncs your labels (https://bitcointalk.org/index.php?topic=154144.0) between Electrum installs/instances.
• Point of Sale - Adds a window with QR Code and more payment information.
• QR Scanner - As the name implies
• Virtual Keyboard - Adds a virtual keyboard to the password dialog.

Interactive console
The wall has been turned into a virtual console. The provided python environment gives users access to the wallet and gui. Most
electrum commands are available as python function in the console. Custom scripts an be loaded with a "run(filename)"
command. Tab-completions are available.

Offline wallets
Offline wallets now work in a way similar to Armory:

1. User creates an unsigned transaction using the online (watching-only) wallet.
2. Unsigned transaction is copied to the offline computer, and signed by the offline wallet.
3. Signed transaction is copied to the online computer, broadcasted by the online client.
4. All these steps can be done via the command line interface or the classic GUI. ("Load transaction" from "Import/Export" tabs in settings)

Private key exports
Private keys can be exported from within the classic GUI. For a single address, use the address menu (right-click). To export the keys of your entire wallet, use the settings dialog (import/export tab). It will dump your private keys to a csv file.

Multi-sig transactions
It is possible to create, sign and redeem multisig transaction using the command line interface. This is made possible by the following new commands: dumpprivkey, listunspent, createmultisig, createrawtransaction, decoderawtransaction, signrawtransaction. The syntax of these commands is similar to their bitcoind counterpart. For an example, see Gavin's tutorial: https://gist.github.com/gavinandresen/3966071

Wallet location for Windows changed
The location of the Electrum folder in Windows changed from LOCALAPPDATA to APPDATA. Discussion on this topic can be found here:
https://bitcointalk.org/index.php?topic=144575.0. This process should be automatically done for you but if a wallet is found in both folders it might ask you to resolve it yourself.

Address generation
The wallet waits for 2 confirmations before creating new addresses. This makes recovery from seed more robust. Note that it
might create unwanted gaps if you use Electrum 1.7 together with older versions of Electrum.

Various changes
Because of the internal changes there are currently problems creating the "single .exe build" of Electrum. Only the installation option is available. The good news is that command line options for this version are working and the style for the Lite GUI is packaged again.

Also if somebody could let me know if the "upgrade notification" in 1.6.2 was working that would be great :)

Downloads available on the Electrum site (http://electrum.org/download.html)
Bug tracker (https://github.com/spesmilo/electrum/issues)

I'm proud to announce version 3.0 of Bitcoin Wallet.

The changes are massive:

• Now requires Gingerbread (Android 2.3.3) or later.
• Export/import encrypted private key backups to/from mail or online storage.
• Switch to new block store format, uses seriously less internal storage and doesn't grow.
• New installs are instantly fully updated and useable.
• Got rid of block chain snapshot in APK, installs updates much faster.
• Lots of small improvements and bugfixes.
• Based on bitcoinj 0.8.

If you want to take advantage of the new block store format, you need to reset your blockchain once (Options > Settings > Reset Blockchain).

Download/update from Google Play:
https://play.google.com/store/apps/details?id=de.schildbach.wallet
(update will become available during the next hours)

Direct download:
https://code.google.com/p/bitcoin-wallet/downloads/list

Source:
https://code.google.com/p/bitcoin-wallet/source/checkout


Thanks to everyone who contributed to Bitcoin Wallet and bitcoinj. Mike Hearn again invested lots of work to make mobile wallets work just as snappy as online wallets, but without the disadvantages of online wallets.

V0.5.9 (Encrypted Wallets release)

Features
Version number removed from Mac app name
Updated help files
Fixed bug on opening wallet that is already open
Fixed ticker restart bug

I've built a Bitcoin web-wallet for feature phones. It works much like Instawallet did, but uses a login and password.
I originally built it for African phones, so I've ensured compatibility with the five most popular models used there.
Everything validates to XHTML Basic 1.1, so it can run pretty much anywhere you can access the web.
Here it is running on my feature phone:

New Version of Android App

https://play.google.com/store/apps/details?id=piuk.blockchain.android&feature=nav_result#?t=W251bGwsMSwyLDNd

• PIN Protection
• Improved Fee Handling - The Fee policy set in the web interface will now be honoured in the android app
• Second Password will be cleared after a transaction is sent
• Fix Pairing Issues

https://i.imgur.com/hvQp3gl.png

How PIN protection works

1) When the PIN is created a unique secret is generated and stored on the server.
2) The users password is then encrypted with the new secret and saved on the device.
3) When restoring the wallet if the correct PIN is provided the server responds with the secret allowing the device to decrypt the password.
4) If the PIN is entered incorrectly 4 times the key is removed from the server and the main password will need to be re-entered.

Prevents malicious app on rooted devices from reading the password directly from app data however more sophisticated malware that reads the app memory or keyloggers will still be possible.

P2P Fallback mode in the android app

The android app now includes to ability to switch between using blockchain.info's servers to retrieve information about transactions and the bitcoin p2p network itself. When P2P mode is enabled the app will switch to using bitcoinj as an SPV client and once it has synced the block headers you can send and receive transactions even is blockchain.info is offline. It can also be used to verify your wallet balance independently of blockchain.

- In P2P mode you cannot generate new addresses (since the wallet can't be saved on the remote server)
- Watch only addresses will not work
- If the app cannot connect to the PIN server the password will need to be re-entered every time the app launches.

https://i.imgur.com/W7tc9Xr.png

- All forwarding transactions will now include fees covered by blockchain.
- There is now a minimum transaction size of 0.001 BTC. Payments will pool in the receiving address until that threshold is reached.
- Notifications should be faster.
- Improvements to shared send mixing.

V0.5.10

Changes

Fixed issue 116 - could not import blockchain.info backups
Fixed issue 117 - fee was too high
Fixed issue 121 - MtGox ticker information not showing
Fixed issue 125 - improved overzealous syncing of wallet(s)
Fixed issue 137 - Import / Export filechooser nomenclature
Fixed issue 140 - use installed checkpoints file if newer
Fixed issue 141 - bump to XChange 1.7.0, XChart 2.2.0

Ottima alternativa a blockchain.info:

http://carbonwallet.com/

Recensione del servizio: http://bitcoinmagazine.com/introducing-carbon-wallet/

Electrum version 1.8.1 is released.

Changes:
 - notifications of payments
 - the client does no longer enforce a minimum transaction fee, except the fees required by the bitcoin network
 - various minor bug fixes


The upcoming 1.9 release, currently under development, will be BIP32 compatible. You can find it in the 'bip32' branch on github

Changes:
#133. The Windows installer is signed with authenticode.
#161. Fixed bug: Still prompted for password after a send.
#179. Moved 'Show transaction details' to button bar on Transactions tab.
#180. Added 'Export transactions' to Transactions tab.
#181. Improved build to check dependencies using Gary's dependency checker.
#202. Improved closedown of MultiBit. There are now messages in the titlebar.
#209. Fixed bug: Request labels being wiped after private key import.
#223. Tidied up UI.
#224. Updated to bitcoinj 0.10.1.
#225. Updated to XChange 1.8.0.
#229. Renamed windows installer to get automatic administrator elevation.

# Release 1.9
* The client connects to multiple servers in order to retrieve block headers and find the longest chain
* SSL certificate validation (to prevent MITM)
* Deterministic signatures (RFC 6979)
* Menu to create/restore/open wallets
* Create transactions with multiple outputs from CSV (comma separated values)
* New text gui: stdio
* Plugins are no longer tied to the qt GUI, they can reach all GUIs
* Proxy bugs have been fixed

Version 0.5.15

Changes:
#196. Fixed: Bitcoin URI protocol handler does not work properly under Windows.
#203, #276. Inverted colour scheme now working ok.
#230. Fixed: Exception when sending coins.
#234. Fixed: The addresses in Sign Message / Verify Message need white space trimming.
#235. Fixed: USB drive installation instructions are out of date.
#262. Added support for new blockchain.info wallet format to Import Private Keys.
#280, #284. Fixed: MultiBit does not build.
#283. Fixed: Misleading error message when trying to send very small amount.
#293. Updated build to bitcoinj 0.10.2
#297. Added a message when wallet closes (with location of wallet).
#299. Added Serbian as a target language.
#304. Updated XChange library to 1.10.0

Version 0.5.16

Changes:
#340. Fixed: if you close a wallet then open it immediately it does not appear.
#347, #410. Updated code to bitcoinj 0.10.3 (transaction is now resent ok if not initially sent).
#407. Changed reset block chain and transactions to always run before wallet creation date.
#408. Send is now prevented until sync completes.
#409. Examined code to see if 'tx is missing' can be improved.
#415. Removed 'File | Delete Wallet' entirely for safety reasons.
#418. Now performs a ping of peers before send as a network check.

Ragazzi scusate ancora una volta la mia immensa ignoranza. Premetto che ho utilizzato il tasto cerca e non ho trovato niente :)
Io con multibit, pago delle fee un pò altine quando invio un pagamento, circa il 5%.

Sapete consigliarmi un wallet desktop, che abbia fee basse (non mi interessa se i bitcoin arrivano dopo 1 minuto o dopo 2 giorni) e che soprattutto non ci metta 1 mese a scaricare blocchi quando apri un portafoglio (ho provato bitcoin-qt , ci ha messo un giorno a sincronizzare un nuovo portafoglio e mi ha scaricato circa 5 giga di dati).
In pratica dovrei creare 5-10 wallet sui quali ricevo qualche briciola di bitcoin e poi mandare tutto al mio wallet principale
Danke

scusate una domanda, ora leggendo il post di bitta ho notato la parte dove dice che bitcoin-qt gli ha scaricato 5gb di roba, allora vado a vedere e io mi ritrovo ben 16gb di file .DAT, ma questi file servono per forza immagino...
Ma a sto punto ho installato multibit che non ha fatto nessuna sincornizzazione e non occupa tutto quello spazio per nulla. A livello di funzionalità, non ci sono differenze tra i 2 wallet? tengo multibit che mi pare pure più completo a livello di interfaccia.

Che sappia io non ci sono differenze sostanziali...se ti piace di più multibit puoi usare tranquillamente quello.

Abbe, 16gb occupati a cazzo meglio evitarli!
Grazie ;)

In pratica quei 16gb invece di scaricarli sul tuo pc li va a leggere da un server esterno.

beh se la sicurezza è la stessa è molto più comodo!

beh se la sicurezza è la stessa è molto più comodo!

stavo pensando proprio ora che siccome a questo punto non mi fido più di tenere i miei btc su un exchanger, forse sarebbe meglio tenerli su un portafoglio.

Uso windows 7 (senza update, per motivi che si possono intuire, quindi forse più soggetto a virus) e come antivurus avast e comodo firewall, non ho pc secondari con linux, come sarebbe più sicuro archiviare i miei btc, in attesa di un futuro aumento del prezzo?

La differenza sostanziale è che si va a dipendere da qualcuno, e che quindi si perde in decentralizzazione.

Ognuno faccia le proprie scelte in base alle proprie esigenze o i propri gusti; l'importante è che le scelte siano consapevoli.

Ciao!

E' possibile installare su un proprio PC una versione server di multibit  (con l'intera chain) e su altri PC/smartphone o altro il client (con il solo wallet)?

http://www.reddit.com/r/Bitcoin/comments/1zhief/id_like_to_present_a_bitcoin_wallet_thats_safe_to/
Multisig, multifactor, open source.

-----BEGIN BITCOIN SIGNED MESSAGE-----
There is a new release of MultiBit at:
https://multibit.org

Version 0.5.17

Changes:
+ upgrade to bitcoinj 0.11.1
+ removal of "one satoshi" spam transactions
+ removal of MtGox exchange, default is now Bitstamp/ USD
+ update of localisation and checkpoints files


Release checklist:
https://multibit.org/test/releaseCheckList-0.5.17.jpg


Bitcoin signing:
This message text (starting with "There is a new release" and ending with "Jim")
is Bitcoin signed with the https://multibit.org donation address.


SHA256 hashes for files:
e6ec9b243aa57c822ebe016b7ca82d5206a1151ddb1b7c8e8119f73deb15ea42  multibit-0.5.17-linux.jar
3d20da936a5baf7e7ff32ff38f554bca1475e508390037653d4f8885363e351c  multibit-0.5.17-linux.jar.asc
90506bf43a64986ce8219ca0fb18a5e1f0776cfeb31043ca848cea7f71eda45d  multibit-0.5.17-windows-setup.exe
bcd489a3cf9130dd7f346f4caaa2d8a8f08558f7b0dc8408b31e491b74c3cfdb  multibit-0.5.17-windows-setup.exe.asc
1facdaacaec20c24777c26e05f2655a727c7ea92f0cfe84bb1fbdfcb65ae893c  multibit-0.5.17.dmg
fc59d716bc777ea2c12ab27c2081673ae13f0d197756f04635a48433601d88a2  multibit-0.5.17.dmg.asc
3bdb779bf053000ab1f537739f4b823b9d345f2e898fc3373d39a964b6e61ef3  multibit-exe.jar
e6d76247ea5c9f0317a21c6fd26fd38e9d9b95473f169aaaf5990cedbdaa4da6  multibit-exe.jar.asc
74738b9a40e5de3e3ce54992b9f41b8ae533a37585498d172d61db51911172ce  multibit.exe
1163618127ec4a94690d8ab696520fd7b622d01aed8d39b8b75217946ef856cd  multibit.exe.asc


PGP signing:
You can verify the PGP signatures by installing gpg and importing the key id 0x79F7C572
from http://pgp.mit.edu. The files are signed with the subkey with id 0x23F7FB7B.

Jim
-----BEGIN BITCOIN SIGNATURE-----
Version: Bitcoin-qt (1.0)
Address: 1AhN6rPdrMuKBGFDKR1k9A8SCLYaNgXhty

G5cOxE7yu1tOfbUkMjQcXduJp3OqXw2gI2ugquGjIf8KJkfyY5ApG+FB4l7Bf/zCaKcH6KXsbPmcy1s/DTYz35g=
-----END BITCOIN SIGNATURE-----