by the way which Electrum wallet version is quiet for the Bitcoin fork?
I don't really understand the question here... Are you asking what will happen to the electrum users if there will be a lasting fork? |
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Please quote my address, i will sign it later.
1xdn3kmVREWiMFRTVhDuNaH7mic1FcS26
here you go... Quoted it! |
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I would personally not trust anybody who downloads CP.... So yes, i think it's ok to give red trust... Altough you should be sure the user in question isn't just trolling...
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Howdy mining community! Ive recently gotten into mining using nicehash on my pc. I had a few questions I was looking to see if you guys could help me with. So I picked up 4 asicminer block erupter usb 330mh/s and I was planning to use them with a raspberry pi. The only thing is I have a plan to use my raspberry pi for something else, and I have some old pcs laying around my house. Does the specs of the pc really matter for mining if I am using block erupters for the mining? And if the specs do matter, what are the minimum spcs the pc I'm using be running? Before you say it, I am 18, I don't pay the electric bill so where as I have read that they aren't profitable on the long scale if I was paying for electricity im not so should not matter. (Just using this to learn more about what I'm doing) Also, could someone point me to a good tutorial on how to set these things up with a pc? Next, should I be using nicehash on my main pc to mine when I'm not using it or is there a better program that will generate me more that I don't know about? Thanks A bunch, Dom  I don't know the power draw of those block eruptors (to lazy to look them up), but you might need a powered usb hub. Other than the power draw, i don't think there are minimum specs for the PC. The PC is just a controller. I used to mine with 2 Antminer U2's using an old HP thin client as controller. I think it had an A9 processor and 128 Mb RAM, and it ran just fine. Just installed debian, bfgminer (IIRC) and ran it using screen... |
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I've been using it for years without a single hitch... ThomasV (the developer) is a nice guy, and is usually willing to help out people who run into problems.
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You can also do this using blockchain. You need to click on send, then press custom and then plus sign to add multiple addresses for output.
There's no custom button after you click on the send button, are you really sure about this? Can you show us some screenshots from your PC AFAIK this feature was removed already on their wallet. This is correct, i just logged in into my (old, empty) demoaccount, the send to many function is no longer there... A bit offtopic: mattermaster, which pool do you own? |
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Hi, I have a bit of BTC with coinbase. Not enough to motivate me to install a wallet etc as I just started.
Does anyone know coinbase's stance regarding the potential fork? Are they staying with the core?
thanks!
They posted this regarding BU in the past: https://blog.coinbase.com/update-for-customers-with-bitcoin-stored-on-coinbase-904dea08ac5fI don't find anything newer, so i think the odds are pretty big their reaction won't change regarding the upcoming potential fork. directly from this blogpost: Customers who wish to access both blockchains at the time of the hard fork should withdraw their BTC from Coinbase since we cannot guarantee what will happen during the hard fork or when this access may be available.
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If you don't have enough cash to buy a hardware wallet which I would have suggested ledger nano, I will suggest you make use of a desktop wallet. Electrum and Exodus always come to mind as they are both light desktop wallet. I will recommend Exodus anyway, as it is very user friendly with great support online. Just try what works best for you. With respect to your question though, make sure you back up your funds and export your key in a very safe place cause you wouldn't want that to get into the wrong hands. Remember also that desktop wallets are as safe as the system you installed them on, so if you aren't sure if your system is clean from virus and you don't have a good antivirus as well, I will suggest you get a good one and probably clean up your system first by formatting or otherwise just get a paper wallet as they are safer but you can only receive coins with them.
Altough your general recomandations are OK, i'd like to adjust/correct some things here: 1) the ledger nano is not being produced anymore 2) i would not recomend exodus over electrum. To be honest, i had never heared about exodus before i read your post, and i'm unable to find it's sourcecode. Electrum on the other hand is 100% open source, and it has a proven trackrecord. 3) you can also spend from a paper wallet, altough it is recommanded to completely sweep it and discard it afterwards. |
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I believe Ledger Nano S works too right ?
This i know for sure  I own a ledger nano S myself, i know for sure there are ways to get your hands on the private keys in case of a split... In my opinion it's most likely that either a fork will not occur (or at least, one of the two coins will become worthless pretty fast) OR in case a real fork occurs and keeps existing, ledger will probably roll out wallet software so you'll be able to spend both coins (did not research this tough, since i'm not worried) |
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Hello , I have my btc in trezor since a year or so , do I need to do with them something before 1 of August? Thanks folks
AFAIK, you can export your private keys if you use your trezor in electrum (not verified, tough i think i'm correct). In this case, you don't have to do anything, just wait it out and see if there's a fork. If there is a fork, and trezor decides only to support one of the two coins, you can export your private keys to a wallet that supports both (or at least, to a wallet that supports the other fork). If there is no fork, there is no problem anyways. Alternatively you could use a paper wallet, the only reason I opted out was for every transaction you need to use entire balance, but upto you.
Technically, it is possible to spend only part of the unspent outputs that are spendable from your paper wallet, however they are not recommanded. It's possible to use the private key from your paper wallet to create and sign a transaction spending only a part of your balance on an offline machine, the move it to an online machine using a usbstick and broadcast it from there... The downside to this setup is that your public key will also be broadcasted to the network... |
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Hi guys,
I recently got into Btc mining and planned on using a hardware wallet (Ledger Nano S) but it's sold out and will only be available in August. Because of that for now I send my mining earnings to Coinbase.
On lieu of upcoming changes on Aug 1 can you recommend a wallet I should be using to store my fraction of a bitcoin safely?
Any offline or desktop wallet that allows you to export your private keys is better than an online one like coinbase. If it's just a small amount of BTC, i'd recommand either bitcoin core or electrum (make sure your PC is clean tough). If it's a lot, i'd go for a properly created and bip38 encrypted paper wallet while you're waiting for your hardware wallet to arrive. |
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bitcoin is pseudo-anonymous. All transactions are included in the blockchain (decentral database), so it's possible for somebody to follow these transactions (inputs, outputs, change addresses,...), and using some data mining and some clever algorithms, it's possible to find most addresses belonging to your wallets. Couple this information with the fact that most exchanges follow KYC regulations and require your identity verification AND the fact that if you buy a physical good, you'll have to provide a delivery address. The end result is that if you ever bought bitcoin with a verified account, or spent bitcoin using your real address, somebody with enough resources and time will probably be able to find you... That being said, no ip's are recorded in the blockchain. A node can only (potentially) record the ip of which it receives a transaction (but it can never know it is the ip of the person creating the transaction). So, if you use a VPN (or tor) and never couple a physical address or a forum nickname to your addresses, it'll be pretty hard to track you down. There are also other sollutions to enhance your privacy, but i'm not going to go into details this time |
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Hi, everybody
Where i can find information about wallet try to read the sticky posts at the top of the correct subforums. In your case: https://bitcointalk.org/index.php?topic=1631151.0;topicseenNow, it would be nice of you if you closed this topic, otherwise it'll soon be filled with useless discussions about which wallet is better, while everything is already discussed in the topic i posted just above this text. |
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Never heard of these USB miners - any recommendations of a good cheap one for playing with mining the newer Altcoins as they come out?
AFAIK, the USB-miners only work with sha-256 (bitcoin etc). Correct me, if I'm wrong. Scrypt usb miners exist That being said: they're also not profitable to run |
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....performing a successful double spend is not at all easy.
Creating a double spend is not hard at all ... i said performing a successful double spend not creating one. it is like saying i can easily use a stolen credit card to withdraw money from an ATM. yeah you can do that but is it easy to perform and not get caught? I'd have to partially agree with you... I did indeed mess up and mixed up performing and creating... However, i'd still have to say that performing a double spend is not that hard to do either (granted, it's harder than creating one, but it's still not impossible to do). A lot depends on the timing and the specific parameters used for the transaction. It would not be hard at all to write a script that creates a transaction with a very low fee and only broadcast this transaction to a very limited amount of nodes, then waits for the scammer's input before creating and broadcasting a transaction with a much higher fee whose outputs could only be spent by a signature from a private key the scammer controlls. (so the scammer would buy a hamburger, starts up his payment program that generates a low-fee transaction and broadcasts it as a payment. As soon as he walks out, he gives input to his script so it double spends the inputs in a high-fee transaction but the output is now spendable by the hacker instead of the burger joint). A while back, when the mempool was exploding and the fees were astronomical, i've successfully double spent the inputs of many stuck transactions while i was helping people that didn't add sufficient fees. Granted, right now a script as described above might be less succesfull, but at times of mempool congestion, i know from experience you should be able to scam most companies that accept 0 conf transactions. This is why i would advise anybody to wait for at least 1 confirmation (even for micro payments). |
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Also, accepting 0 conf transactions would be problematic, even for a hamburger joint. There's just to much risk that the sender will either double spend the inputs, or that the fees were so low the transaction never makes it into a block...
you know performing a successful double spend is not at all easy. and also as i have said many times, there are easy ways of figuring out the risks of a payment. i have spoken with a couple of services, and they usually use the blockcypher's confidence factor and it has a pretty good description in its documents. it easily and with a good accuracy of >99% tells the businesses if there is a risk or not and how much that risk is. and for example in case the fees were small the "hamburger joint" can simply deny the payment and ask the payer to increase it. Creating a double spend is not hard at all (with the defenition of double spent = creating a second transaction that uses the same unspent outputs as an input input as an initial transaction that is still unconfirmed)... I could do it in just a couple of seconds, so anybody abusing the system should be able to do this to. The big problem is getting a double spending transaction propagated to the network... As soon as the initial transaction is in the node's mempool, they'll usually reject the double spending transaction. That being said, if you're an attacker, and you're fast/lucky enough, such an attack isn't something magical, it is, in fact, really easy to do... For example, i created two UNSIGNED transactions: 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 both spend the same unspent outputs, both have a completely different fee (one will probably never confirm, the other one will be in one of the first mined blocks). If i would sign and broadcast the first one for paying for a hamburger, and as soon as i had the goods in hand sign and broadcast the second one (but probably make the output spendable by my own address), the hamberger joint would have a reasonable chance of being stuck with a cancelled transaction... If i was doing this every time i bought a burger, i'm pretty sure i would be able to steal from them several times... |
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Ok, so I'm a total noob and I think I f***ed up! I transferred money from bitcoin.de to blockchain.info which went fine. I now tried to transfer it back from blockchain.info to bitcoin.de and it's stuck in "unconfirmed transaction". Unfortunately I think the issue is that I entered zero as transaction fee  I know I know... This was last week Monday... So it's over a week now. Is there anything I can do or are my bitcoins forever lost in the transaction universe? I made a feechecker a while ago, it should give you all your options: https://www.mocacinno.com/page/feecheckerdo realise that most of the time, viabtc is proposed as a sollution for a low-fee transaction. However, in your case, this might not work, since viabtc requires at least 10 sat/byte. |
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ANYONE PLEASE HOW TO START MINING USE CPU FOR BEGINER?
you don't start mining using your cpu... Just last week, i calculated the income for mining btc using your CPU+GPU would be around 30 cents worth of BTC a year (using a regular pc and a normal graphic card). This income did not include your electricity or hardware costs. So, bottom line, you'll lose money for every second you mine BTC using your CPU. |
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A universal transaction system should be setup with preset transaction fees depending on priority of any given transaction.
For example, a fast food transaction is very low priority. It is generally under $20, and fast food companies do not mind waiting 24 hours for confirmation because they have lots of money and it is something they could handle, generally speaking.
However, other high priority transaction (thousands or millions of dollars) would get a universal "higher-priority" fee. Say, level 5/10 for $1,000 transaction and level 10/10 for $1,000,000+. A fast food transaction would be 0/10, meaning 0 confirmations necessary therefore extremely low fees.
Even 0.1% of a million dollar transaction = $1,000. With a $1,000 fee your confirmations will appear in no time.
For fast food, it could take 24, 48 hours or even longer. It really doesn't matter because the transactions are so insignificant people will not bother even trying to double spend.
Hope this make sense for you.
sure, but technically, the system is just not made to work like this. Nobody (not even the miner) cares if you transfer 1 million worth of BTC, or just 1 cent.... They care about the size of the transaction (in bytes) because the size of the block is limited, so they can only fit 1 Mb of transaction data in a single block. The size of the transaction depends on the number of inputs and outputs, not on the amount of FIAT that was transferred. Also, accepting 0 conf transactions would be problematic, even for a hamburger joint. There's just to much risk that the sender will either double spend the inputs, or that the fees were so low the transaction never makes it into a block... |
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Yah. I asked if they would lease one for 1 year (mining equipment gets outdated so fast) and what the cost would be but no response back.  Well, a chip that uses 0.1J/Gh, running with power @3cents/Kwu might keep on running for a long time before it turns completely unprofitable. Offcourse, bitmain might be "pre-testing" out their new product in a while, pushing the diff up and the profit down |
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