I've made a new wallet.dat after 0.13.0, I've got that backed up. What I meant is an additional physical backup - for example, writing down the master seed on paper and storing it in a bank safe.
Initially I planned to do the following:
* Unlock wallet.dat file
* Run "dumpprivkey" with the corresponding address
* Save the resulting private key on paper, laminate it and store in a safe
But unless I'm mistaken, the private key will only be for the specific address I used, meaning it doesn't provide a long-time backup for all possible addresses derived from the master key. Is my understanding correct? Can I get a physical backup that will give me the same type of backup the wallet.dat file gives me?
If you wallet was encrypted, that's good, it means no new seed will be created. If you run dumpprivkey, one private key will indeed be dumped. If you save this pk, it can later be imported in a lot of different wallets. You are correct tough... Your wallet will create new private keys, whith each his own publick key, and address. Each new pk won't be included in your laminated sheet. It seems like the dev's are working on a method to export the master private key, from wich all other private keys can be derived using path m/0'/0'/k' However, it seems this feature is not yet implemented (AFAIK). My node is still running a non-HD wallet, so there is no way for me to test this out... If run on a clean pc, it should be relatively safe to test out the rpc command dumpwallet, and see if you're presented with a master private key... Feedback would be nice  from https://bitcointalk.org/index.php?topic=1594650.0
Hierarchical Deterministic Key GenerationNewly created wallets will use hierarchical deterministic key generation according to BIP32 (keypath m/0'/0'/k'). Existing wallets will still use traditional key generation. Backups of HD wallets, regardless of when they have been created, can therefore be used to re-generate all possible private keys, even the ones which haven't already been generated during the time of thebackup. Attention: Encrypting the wallet will create a new seed which requires
a new backup!Wallet dumps (created using the dumpwallet RPC) will contain the deterministic seed. This is expected to allow future versions to import the seed and all associated funds, but this is not yet implemented. HD key generation for new wallets can be disabled by -usehd=0. Keep in mind that this flag only has affect on newly created wallets. You can't disable HD key generation once you have created a HD wallet. There is no distinction between internal (change) and external keys. HD wallets are incompatible with older versions of Bitcoin Core. Pull request, BIP 32 |
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Hi all,
I want an additional backup to the wallet.dat file. I was thinking of dumping the private key and storing it on paper somewhere safe, but I understand that it will be invalidated after 100 transactions?
Is there a way to get the master seed for the HD wallet? Will "dumpwallet" show me the seed?
Ideally I want something that I can enter directly into Bitcoin Core to regain access to my addresses.
Thanks in advance!
you're talking about the 100 addresses gap limit. Since 0.13.0, this gap limit no longer exists (at least, if you created a new wallet with 0.13.0+... If you just opened your old wallet, there is no conversion from a non-HD to a HD wallet... This would be impossible). Long story short: if you created a new wallet.dat with a version 0.13.0 or up, your wallet.dat can be backupped once, and it will not be invalidated after you create 100 new keys. There is no need to export the master private key. |
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While I was surfing online I found that there are some websites that provide that facility of double spend online.
But I want to know if they provide the option to do this with a custom fee.
These days bitcoin tx are taking so long to get a single conf.
So it will be nice to double spend if they take more than a day.
Creating a transaction doublespending unconfirmed inputs isn't that hard to tell you the truth... But indeed, if you use my site to create a double spending transaction, my wizard will chose the fee in your place, making sure it's sufficient... bitcoin-cli createrawtransaction "[{\"txid\":\"thetxidwhichoutputyouwanttodoublespend\",\"vout\":[number of the output]}]" "{\"[receivingaddress]\":[amounttoreceivewithoutfee]}" bitcoin-cli signrawtransaction "myhex" |
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i have NO conclusive proof to say user bussybuddy is a scammer. If it walks like a duck... looks like a duck... and swims like a duck...   But seriously... I'm still trying to figure out how 100 pixels on a site that seems like it was designed for Netscape Navigator 1.0 (needs more <BLINK> btw) is somehow worth 1.0 BTC... or indeed, why anyone would visit a site composed entirely of ads?  There is precisely ZERO content... and yet, somehow a tiny 10x10 pixel square is worth 1.0 BTC?? Maybe bussybuddy should sell whatever he is smoking on "teh DarkNetz"™... would probably make more money.  You are mistaking, since he claims (without ever presenting any proof) that he sold over 22% of his pixels: According to his own pricing scheme, a 100x100 pixel add should now cost 3 BTC (it'll be 4 BTC once he claims he sold 31% of his pixels). I know i would never, ever, pay 0.00001 BTC for a 100x100 spot on a million pixel webpage... So your concerns are legit  As for the design: I once said his design looked like it came straight out of the 90's, to which he just replied my site looked awefull... After some digging, here is the script he uses: http://tufat.com/gpix-pixel-ad-script/ If you download it, the date it was last modified is..... 2007!!! Since this is the date the zipfile packaging the last version of the script he uses was generated, the initial version must be *really* old... |
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This is a phising message google did a good job sending it your spam folder... Your account was not compromised, it was not sent by paxful.net. It's probably just somebody using a leaked database to send phising messages to everybody on the leaked email list, don't click any links in this mail, don't fill in your username/password and just empty out your spam folder  |
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Went too my Emails spam folder to clear it out and saw Paxful emails there stating someone was trying to reset my password that knows my email address. Latest one being about 15 minutes ago. The emails are being sent from paxfuls email address help@paxful.net can you post the mail headers? It can look like paxful sent those mails, while in reality they were sent from a completely different server. That being said: many databases were leaked, including the bitcointalk database a couple years ago. It's possible somebody is just bruteforcing services like paxful, trying out the email/password combos they got from a leaked database from a completely different service. Newb Question: How to view main header on gmail mobile chrome view? I have no idear if there is a difference between opening your mail in chrome on a mobile, or opening it on a desktop... However, when i try to view the headers from a mail i got on my gmail account using my desktop, i have to open the mail => on the top right corner, next to the arrow you use when you want to answer a mail, there should be a little arrow pointing downwards... If you click this one, you should be able to pick something like "view original" (my GUI is in dutch, so i hope my translation is ok) EDIT => https://support.google.com/mail/answer/29436?hl=en This should do the trick |
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Went too my Emails spam folder to clear it out and saw Paxful emails there stating someone was trying to reset my password that knows my email address. Latest one being about 15 minutes ago. The emails are being sent from paxfuls email address help@paxful.net can you post the mail headers? It can look like paxful sent those mails, while in reality they were sent from a completely different server. That being said: many databases were leaked, including the bitcointalk database a couple years ago. It's possible somebody is just bruteforcing services like paxful, trying out the email/password combos they got from a leaked database from a completely different service. |
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Is this even possible? I thought transactions were grouped together into blocks so you cant confirm a single transaction.
This is true... It's a miner's job to create a block using unconfirmed (verified) transaction it has in it's mempool. The miner then starts hashing the block header (which contains, amongst other things, the merkle root hash of these transactions and a random ellement). If the miner finds a sha256d hash under a certain value (target), he is allowed to broadcast the block to the nodes he is connected to. This is the only way to include a transaction into the blockchain (aka confirm it). So, to answer your question: if you're not a miner, there is no way to confirm a single transaction. My advice is always pointed towards 3 possible sollutions: 1) create a new transaction, either a RBF, a double spend, a CPFP. This new transaction should be made in such a way it gives the miners an incentive to "unstick" a stuck transaction 2) contacting a miner, ask him to include the transaction in question into the block he/she is currently mining (this is what the viabtc txaccellerator does) 3) wait untill the network either drops the tx, or confirms it (in the end) 1. Seems like an interesting way to get it confirmed 2. Seems kinda stupid since you dont know whos gonna successfully mine the block, right? 3. Takes forever. Well, the second options isn't as stupid as it sounds. Quickseller and macbook-air can push transactions in f2pool blocks. As you can see here: https://blockchain.info/nl/blocks/F2Pool F2pool mines more than 10 blocks/day on avarage... So the time between 2 blocks is usually less than 3 hours (on avarage). So when you give a bounty to Quickseller or macbook-air (and they accept this bounty), you can usually say that your transaction will be confirmed in less than 3 hours (on average). ViaBTC doesn't need a bounty, they just use an online form, they used to mine less blocks (on average) compared to f2pool, but looking at https://blockchain.info/nl/blocks/ViaBTC it looks like they added more hashrate, since they also seem to mine 10+ blocks/day nowadays. So, if you give a small bounty to either Quickseller or macbook-air AND you use the ViaBTC txaccelerator, and you pay btc.com (they also have a paying accelerator), you can allmost be sure that your tx will be confirmed in ~1hour. Offcourse, you'll have payed way more than if you added sufficient fees when creating a transaction in the first place The thirth option (waiting untill most nodes drop the tx from the mempool isn't that stupid either. The default node's setting is to drop a transaction from it's mempool if it remains unconfirmed for 72 hours. Some nodes (like mine) have edited this setting (i keep a transaction for 10 days), but if you wait 4-5 days, chances are good that your transaction will have been forgotten by enough nodes, so you can safely re-use the unspent outputs to create a new transaction. |
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...
bankpower
I do not know your financial situation, but buying one of the hardware wallets (there are several to choose from) might be a great way to learn as well as secure your BTC at the same time.
Look for threads here at bitcointalk discussing Ledger and Trezor. I have used both with great success, but I currently like my digitalbitbox the best of all, it seems more secure, easy & safe to use and solidly built.
But what happens in case of failure? A paper wallet is safer I guess. Or not? I mean if it falls out of my hands and breaks up...that would be huge problem right?  No, it wouldn't be a problem, not really When you initiate a hardware wallet, you're usually presented with a 24 word seed. As long as you write down this seed and store it in a safe place, you can always restore your hardware wallet. This recovery seed paper is the only real security thread there is... If somebody finds your seed, he can steal your BTC. A paper wallet should be bip38 encrypted. As long as you've picked a non-dictionary, longer password, it's allmost impossible to crack. You should copy your paper wallet a couple of times tough, paper can desintegrate over time! |
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Located in Beaverton, Oregon.
Testing the waters. Open to offers, but looking for $1850 shipped. Everything in pristine shape. More info / pics, send me a PM.
- 6x XFX Black Edition RX 480 8GB GPUs
- Intel G3320
- ASRock H81 Pro
- 8GB RAM
- 120GB PNY SSD
- 1300W EVGA PSU
- custom black frame
It's running ethOS, but I can switch it to whatever OS you want. I'd recommend ethOS, runs like a beast.
Takes about 870w at the wall, give or take 10w.
Has anyone dealt with this POS?! he burned me out of 1.5 BTC looking for his address/email? name is something like Max Greenfeld from Beaverton Oregon any help would prob get some BTC sent your way. Thank you It looks like user maxg sold 2 S9's to aryer84 https://bitcointalk.org/index.php?action=trust;u=723522Either aryer84 is an alt of maxg, or he *should* have information on how to locate maxg (since i can only assume one would track the sending of 2 S9's). If aryer84 is an alt of maxg, you can deduct from his trustpage that user kyren has sent him a set of KNC Titan cubes, using ognasty as escrow https://bitcointalk.org/index.php?action=trust;u=177279So, i'd personally try to contact aryer84 with proofs that maxg scammed you... If you find out that aryer84 is an alt of maxg, try contacting ognasty and kyren. Ognasty is nobody's alt (he's really trusted around here), kyren *might* be an alt, otherwise he *should* be able to help you (since he'd know where he sent the titan cubes). Do note that you'd have to present a solid, proven, scamcase to aryer84, otherwise it would be unwise of him to divulge personal information... It might even be better to file an official police report, and ask for this information legally. |
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Is there a service where you can have encrypted text on the blockchain, which is accessed with a private key or something like this?
Here you go: https://en.bitcoin.it/wiki/OP_RETURNHowever, it's still be up to you to propery encrypt your data beforehand. here's an explorer: http://coinsecrets.org/ |
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Buying : Bitcoin
Rate : 1500$
Payment : Paypal
Qty : 1 BTC
Payment : instant after BTC
Note : i will not pay first
payment with in min after btc
I guess in your case, the most obvious option would be to use virwox.com, high fees (apparently up to 20%) and 48 hours delay, but you'll probably be able to convert PP to BTC if they don't block your payment (have not used them in over 2 years tough). Why: - you want to trade a reversible payment type (Paypal) for an irreversible one (BTC) - you want the other party to send first, eventough you're the only one that can reverse payments - a DT member gave you negative trust already - you haven't built a good reputation on this site (yet) |
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Hi, I would like to stake my address here. -----BEGIN BITCOIN SIGNED MESSAGE-----
Hello, this is bartolo from bitcointalk.org I am staking my address 15NZ1ibMc7ZriPW8hsVWMBiG9gVt55Cz3P . Today is Tuesday , May 09 , 2017 . Thank you .
-----BEGIN BITCOIN SIGNATURE-----
IHBKKUoNDmqqLEw09L0jZYRJ2yWgyCyND6gfk6O/gWgyTSHSP6jaEq/H+ONM9Bp5tLCvSjyQLC5pRRZllCI9fTo=
-----END BITCOIN SIGNATURE-----
quoted and verified |
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One of the inputs for your transaction comes from 86b83900eb92fed174f5f620325c4bfe9b4f28ab0d26cf852a61ebba6eac59b3
That's a big transaction, 25kb with zero fee. And you need that one to get confirmed in order to have yours confirmed.
Accelerating that will not work with ViaBTC since the fee is zero. I don't know how CPFP could work for such a big transaction with so many outputs...
However, the problem is not your transaction; the problem is the source of your money (well, one of the sources).
I didn't dig this deep, but this is also a good explanation why the OP's tx is not broadcasted properly... If one of the inputs is unconfirmed and comes from a tx that has a 0 fee, it was probably rejected by a large part of the network, so the output never made it to the UTXO set, so OP's tx used inputs that were not in the UTXO, so it got rejected aswell... I tought it had something to do with double spending transactions that were still in the mempool, but this theory might actually be a better one ... I have to dig a bit deeper next time i give some advice  @OP: if this is true, chances are slim the parent transaction (the zero fee one) will actually get confirmed, unless there's a pool that mines it because it has a high priority (small chance, since most miners don't seem to reserve any more space for high priority transactions). I'd focus on transaction 86b83900eb92fed174f5f620325c4bfe9b4f28ab0d26cf852a61ebba6eac59b3 first... If it's really important you can spend this output, try to do a CPFP, try to contact Quickseller or macbook-air and offer a reward, or try to convince the sender to double spend the inputs for this transaction to create a new transaction with the same outputs but a higher fee (so less output to the change address). If you don't really need to spend the output from the parent transaction at this specific time, an other option would be to re-create your transaction, using the same inputs, exept the input you got from tx 86b83900eb92fed174f5f620325c4bfe9b4f28ab0d26cf852a61ebba6eac59b3. |
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Hello ,
My PC config:
GPU: MSI R9 280X 3GB
CPU : Intel CPU i7-4770K 4.0 GHZ
RAM: 24GB RAM 18000MHZ
Motherboard:MSI Z97 Gaiming 7 Motherboard
Cooler for processor only - normal one
Can I mine ZCash / Monero with this config.
http://monerobechmarks.byethost5.com/?i=1https://en.wikibooks.org/wiki/ZCash_mining_GPU_ComparisonI'm not an expert in this field, but the only spec that is really relevant is your GPU. It seems like your particular GPU can achieve a decent hashrate, altough it looks like it might not be the best one around... |
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Is this even possible? I thought transactions were grouped together into blocks so you cant confirm a single transaction.
This is true... It's a miner's job to create a block using unconfirmed (verified) transaction it has in it's mempool. The miner then starts hashing the block header (which contains, amongst other things, the merkle root hash of these transactions and a random ellement). If the miner finds a sha256d hash under a certain value (target), he is allowed to broadcast the block to the nodes he is connected to. This is the only way to include a transaction into the blockchain (aka confirm it). So, to answer your question: if you're not a miner, there is no way to confirm a single transaction. My advice is always pointed towards 3 possible sollutions: 1) create a new transaction, either a RBF, a double spend, a CPFP. This new transaction should be made in such a way it gives the miners an incentive to "unstick" a stuck transaction 2) contacting a miner, ask him to include the transaction in question into the block he/she is currently mining (this is what the viabtc txaccellerator does) 3) wait untill the network either drops the tx, or confirms it (in the end) |
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I will do this for you, an easy job, and a lot of people know the way to do it, so I'll do it for free, whenever you need it. Support here, and you do not need to pay any fees. Money is not the most important thing, help is always needed with good people.
If you're thinking about viabtc: i don't think it'll work, since i suspect the transaction is using inputs that were previously used in a different transaction that remained unconfirmed and is since dropped from the blockchain.info's node mempool.... However, viabtc, like my own node, has modified mempool retention times... So they won't drop a transaction after 3 days, so they'll reject transactions that double spends an input for a longer time... |
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