Hot answers tagged

9

I can't elaborate much on your answer but can provide reasons as to why this market seems so bare. Apple has shut down other providers of BitCoin wallets for "legal reasons" -- all due to the legal ambiguity of BTC transactions. Your best bet is to look into mobile-optimized websites that offer BTC transactions. I'm unfortunately not too knowledgable on ...


4

I looked again at the web inteface and found this: Account Settings - Continue - (password if promted) - General - Default Fee Policy - Generous I'm not sure if this is something new or if I just missed it before. I then sent a test transaction of 0.01 BTC from my iPhone and it included a transaction fee of 0.0005 BTC. So this seems to be a solution. -- ...


3

So is it one OP_RETURN parameter for each bitcoin transaction or per each input/output address? One OP_RETURN output per transaction regardless of the number of inputs and outputs is standard for 0.9.x bitcoin core clients. If its each transaction, so its safe to say its about .0001 btc to send 40 byte message? Yes, but you should not do it without ...


3

If your private key is compromised your coins are gone So the short answer is that the "Linode problem" where your entire private key is at the mercy of a third-party capable of root access to your system is somewhat intractable. As others have stated you can limit your key's exposure, but malware is patient. Off topic, but possibly of interest, is a ...


2

As of April 2012, the two methods are: What countries is the service available in? Argentina, Australia, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Canada, Chile, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hong Kong, Indonesia, Ireland, Israel, Italy, Latvia, Lithuania, Luxembourg, Mexico, Netherlands, ...


2

The answer to that depends on the scope of what the malware can do. Assuming the whole device is compromised, exposing all of our stored data as well as everything we do on it, storing your wallet on a mobile phone will result in your coins being stolen sooner or later. If your coins are store in an encrypted wallet, the malware just has to wait until you ...


2

Apple does not allow Bitcoin wallet applications on its devices.


2

Aside from OP_RETURN message attachment, what other methods are there to attach custom data? IP Transactions can do that. BIP0070 will probably be able to do that.


2

Assuming you want an app which is secure, but presumes that: the mobile is completely compromised; the private key has a strong password; there is a backup of the private key. A form of two-factor authentication, perhaps through bluetooth on another device, may be able to provide enough security for most use cases and most current bitcoin ...


2

Yes, you can use the node's RPC API method getnewaddress to create a new public-key pair and it will return the address.


2

You can use the wallet passphrase (Bip39 mnemonic) as many times as you like. You don't have to export it again. But mind, breadwallet does not follow the bip44 chainpath scheme. Importing the passphrase into a different wallet application would first require to "convert the keypath" with a tool. But i would recommend to not use the same wallet passphrase (...


2

AFAIU, PoS is considered flawed by large parts of the cryptocurrency community. I've not kept abreast of POS coins, but some that I could think of are Peercoin, NXT and Blackcoin, which are currently ranked 38, 39, and 58 on Coinmarketcap. Unless I'm missing some new more popular ones, I'd say there is less software for them because they have less of an ...


2

Is there a mobile wallet that support using a Trezor hardware wallet to spend coins? You first need an OTG cable and a phone that supports acting as a USB host. Trezor has not released a mobile version of their wallet. However they have a Wallet Manager that can be used on your mobile (for Android). This allows you to manage the Trezor (but not spend ...


1

Here is the bip39 for traditional Chinese word list. https://github.com/bitcoin/bips/blob/master/bip-0039/chinese_traditional.txt Also, there are some useful pages that explain how to implement Mnemonic code for generating deterministic keys as following, https://github.com/bitcoinjs/bip39 https://iancoleman.io/bip39/#chinese_traditional


1

I work with obviously unspendable addresses. Send any one single line from a thin client, phone. Use a core node to bundle long messages with sendmany. https://live.blockcypher.com/doge/tx/63de9f4da10693813c977e895dafff0ae725ff9011c76d90f483c6243890ebb6/ This message goes on for 83 addresses and includes a real address, which causes the wallet on my ...


1

Unfortunately no apps are allowed. Best you can do is just use a web browser.


1

That's lot of questions!! The first thing I recommend is to browse the pages here: http://bitcoin.org/en/ As a bitcoin user/spender you don't need to think much of how mining works, just that they are crucial to keeping the entire system safe. Other than mining you can get bitcoins from an exchange, or other services. https://localbitcoins.com/ is a site ...


1

I agree this is a horrible limitation of this app too and makes the app pretty much useless the way it is. I used to use it to send bitcoins but sometimes my transactions would take hours or even days to be confirmed, so I no longer use it. Unfortunately I'm stuck carrying around a laptop now if I want to be able to spend bitcoins. That's kind of awkward to ...


1

Generally, application updates do not occur automatically. As a result protection from a wallet-stealing compromise, for instance, can come from not installing updates until after most everyone else has already upgraded. This delay won't protect if you do installed it eventually but the likelihood would be that others would experience a problem before you'...


1

Technically there is no reason you can't have a wallet on an iOS device, but it appears (according to this article) that Apple isn't allowing Bitcoin wallets into the App Store.


1

Bitcoin Wallet Electrum BitcoinSpinner All of the above mentioned store the wallet file locally on your phone


1

Andreas Schildbach's open-source Bitcoin wallet supports this feature. With the "Request bitcoins" screen open, tap another device to send it the bitcoin: URI to send to (that opens the "Send bitcoins" screen on the other device). You can also scan an NFC tag containing a bitcoin: URI to open the "Send bitcoins" screen with the fields filled in.


1

Provably fair means the player can prove the operator didn't cheat. With website-based provably fair systems, the generation of a random number and/or client seed is easily to see and monitor. Unless a mobile app is open source, this same capability is not available. So a provably fair website that provides an app doesn't mean the app provides provably ...


1

For Android, Bitcoin Balance Scanner (from Beyondem) will display the balance after converting using the exchange rate: https://play.google.com/store/apps/details?id=com.beyondem.bitcoinbalance BitcoinBalance (from London Trust Media) will display the number of bitcoins. This basically just launches the web-based blockexplorer for the address scanned. It ...


1

To get the balance and list of transactions you could do an HTTP get to blockchain.info. E.g: http://blockchain.info/address/17w9uVZuPgsY7iLBVGB7qTZ1ZiZnTJKHLq


1

Mt. Gox mobile, available from Google Play and on jailbroken iPhones using Cydia allows you to redeem private key QR codes into your Mt. Gox account. As a bonus, if any payments are made to that address in the future, Mt. Gox will automatically sweep those funds as well.


1

Stephen, I would add to what the user linhares answered earlier to your question. Indeed, a two-devices solution would clear the air and in the same time will mitigate the wrongdoings of the staff of the mobile software manufacturer (I'd refer here only to Samsung as you did, too), or even of a possible malware infecting your smartphone. A wearable wallet, ...


1

The Blackberry World (app store) shows two wallet apps: Bitcoin Wallet by Andreas Schildbach Bitcoin Spinner (unofficial release, so I'ld check first on the Bitcoin Spinner forum thread to see if it is verified as a straight port with no wallet stealing code injected)]


1

Coinapult's SMS wallet is currently only available in the U.S. and Canada but it works as you describe -- usable for a transaction where either or both parties are using a feature phone with only SMS / text messaging service (i.e., no other data service necessary). Coinapult may be adding support elsewhere, but their current freemium business model might ...


1

the question is how old are the mobile phones. if they have J2Me it would be possible. you just need a sms 2 btc gateway that stores the blocks like BCCAPI and allow users transactions. and a j2me app thats hold the privat key and with the possibility to send and recive sms. (given by the j2me api) you would need do develop this both software, and test it ...


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