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3481  Bitcoin / Bitcoin Technical Support / Re: How to return back my send btc to my own wallet..transaction unconfirm on: August 30, 2017, 12:56:17 PM
Thanks for you guys, so the best thing to do is to double spend.. but in my head how to do it?? Step by step ..thanks

Like i said in the post right above yours: at this point, it's to late... The transaction is confirmed, so there is no way to cancel it out anymore...
If you want to learn how to do this for future reference, i must tell you that it's a rather difficult, technical process.

What you would need to do to create a double spending tx in bitcoin core:
- export the private keys belonging to at least one of the unspent outputs you want to double spend
- open bitcoin core, either from the cli, or open the debug window
- type "importprivkey [the key you exported"
- wait untill the rescan is finished
- you can try to use coin controll features, if you're lucky the unspent output you need to double spend is in the list of selectable outputs... In this case, use this output to create a new transaction (but with a higher fee)
- if the unspent output isn't in the coin controll's list of selectable unspent outputs, you need to create a raw transaction yourself from the cli or debug window: createrawtransaction [{"txid":"txid in which you received the unspent output you want to double spend","vout":n}] {"yourchangeaddress":amountminusfee}
the vout:n is the vout (basically the counter that counts to the n'th output
- after you created the raw transaction, you need to sign it using: signrawtransaction "hexstring"
- after you signed the tx, you need to broadcast it using: sendrawtransaction "hexstring"

I hope you now realise what i meanth if i was saying it was rather technical and timeconsuming.
If you want to try this out yourself, i'd recommand you'd do this on the testnet...
3482  Bitcoin / Hardware / Re: USB ASIC Miners on: August 30, 2017, 12:10:33 PM
I see lots of websites with details and reviews but none actually selling them?

Im very new and only getting into mining on a small scale for now... any help/links please??

I bought my gekkoscience compaq from bitshopper. He also sells the 2pac:
https://www.bitshopper.de/shop/sha-256-miner-en/gekkoscience-2pac/?lang=en

HOWEVER: please note that the chance you'll ROI using an usb miner is rather small...

I've ran a best case scenario simulation for you:
https://www.coinwarz.com/calculators/bitcoin-mining-calculator/?h=25&p=2&pc=0.10&pf=1&d=888171856257.32100000&r=12.50000000&er=4650.10170000&hc=0.00

IF the diff stays the same (witch won't happen)
IF the BTC price stays this high (witch nobody knows)
AS long as the block reward doesn't halve (the reward will halve in a couple of years)
IF you keep this baby running 24/7 (good luck)
IF it runs at 25 Gh/s (good luck)
IF it only uses 2 Watt (this is the mimumum power draw indicated @bitshopper.de, it's probably when you seriously underclock such a stick and don't count the power draw of your controller)
IF you only pay 10 cents/Kwu (i pay 27 cents/kwu myself)

You'll make $12/year in BTC, so it'll probably take +7 years to pay back the stick + S&H IF everything stays status-quo...
3483  Bitcoin / Bitcoin Technical Support / Re: How to return back my send btc to my own wallet..transaction unconfirm on: August 30, 2017, 05:33:12 AM
Hello i send btc to wallet given by thunderbit.io but this website is totally scam..my transaction to this site is still unconfirmed..i like to cancel the transaction so it will returned back to my own wallet.

https://blockchain.info/tx/4197f76a5e5b8a84029c8586f739abb68d3e93e65f25ba3d33cc1e2a7b001804

In this case your only option would be to manually create a new transaction, using at least one input from the tx you want to cancel, with a much higher fee than the tx you wanted to cancel. Then broadcast this new tx as widely as possible and hope a miner decides to put it in the block hes working on ( and gets lucky).

This is technically difficult, timeconsuming and a longshot, there is a big chance it wint work anyways.  

On the other hand, with a 6 sat/byte fee, there is a big chance no miner would accept this tx anyways, in which case it'lk probably be dropped from most nodes' mempool in ~3 days even if you do nothing (no guarantee either)

I am not sure. Is it possible to create another transaction using the same input? Blockchain.info wallet will not allow you to do that. The only chance is that the traction will get cancelled due to low fee. But I am also not sure about it. The average fee has fallen once again.

Sure you can, but the process will require you to get your hands on (export) the private keys belonging to one (or more) of the following addresses: 1PKnAWi354pBAGsvHtcUo8StVzEKF5oUPF,1KhFbcBj2sAFUnnTtjMLyC948CRBaZM7KY, 127q3WFPJ8gFLc7QYfsQYAkvqphCAyaA7c
Then, you can import these private keys in a different wallet. Like DannyHamilton already said: bitcoin core is the easyest, since it will allow you to easily create and sign raw transactions cherrypicking any unspent output you want, leaving the exact fee you want... However, bitcoin core takes a long time to sync, and requires a lot of diskspace (even if you prune the database, it requires several Gb).

The other wallets i've succesfully used in the past are an offline version of coinb.in and electrum.

EDIT: OP: you can now close and lock this topic. While i was writing this post, your transaction got confirmed, so there is nothing you can do anymore...

So, let your case be a cautionary tale for everybody that practically guaranteed you that the transaction would never confirm, and that you needed to do nothing and just wait it out: there are no guarantees, a miner can pick whatever transaction he wants and put it in the block he's currently trying to solve...
3484  Bitcoin / Bitcoin Technical Support / Re: How to return back my send btc to my own wallet..transaction unconfirm on: August 29, 2017, 09:07:16 PM
just sit back and wait the transaction will be dropped by the network cause no miner will accept to add this transaction into a block especially now since the bitcoin network is getting a lot of trafic
you will probably need to wait for 1/2 weeks but you will get your bitcoins back eventually
Quote
In this case your only option would be to manually create a new transaction, using at least one input from the tx you want to cancel, with a much higher fee than the tx you wanted to cancel. Then broadcast this new tx as widely as possible and hope a miner decides to put it in the block hes working on ( and gets lucky).

This is technically difficult, timeconsuming and a longshot, there is a big chance it wint work anyways.  
i think you missing the point here he doesn't want the transaction to get confirmed he only wants to cancel it and get the bitcoins back. or at least that's why i understood from his topic

Not really, my answer is completely to the point... I'm advising him to double spend the unconfirmed inputs in a new transaction, which would be the only technical sollution to op's problem, next to waiting and hoping that no miner adds the tx to a block before most nodes drop the tx.
3485  Bitcoin / Bitcoin Technical Support / Re: How to return back my send btc to my own wallet..transaction unconfirm on: August 29, 2017, 07:22:34 PM
Hello i send btc to wallet given by thunderbit.io but this website is totally scam..my transaction to this site is still unconfirmed..i like to cancel the transaction so it will returned back to my own wallet.

https://blockchain.info/tx/4197f76a5e5b8a84029c8586f739abb68d3e93e65f25ba3d33cc1e2a7b001804

In this case your only option would be to manually create a new transaction, using at least one input from the tx you want to cancel, with a much higher fee than the tx you wanted to cancel. Then broadcast this new tx as widely as possible and hope a miner decides to put it in the block hes working on ( and gets lucky).

This is technically difficult, timeconsuming and a longshot, there is a big chance it wint work anyways.  

On the other hand, with a 6 sat/byte fee, there is a big chance no miner would accept this tx anyways, in which case it'lk probably be dropped from most nodes' mempool in ~3 days even if you do nothing (no guarantee either)
3486  Bitcoin / Hardware wallets / Re: Trezor vs Ledger nano S. on: August 29, 2017, 06:22:33 PM
Hello. Which of these are better in long time? Have this usb tools a during lifetime? Can them failure after a time ?

Anyone can answer please or nobody know answer?

Offcourse it can fail, and offcourse it has a certain lifetime... Every piece of hardware breaks in the end... I haven't looked up the number of uses a trezor or a ledger have, but you can rest assured that after x thousand uses, these hardware wallets will fail.
Fixing this problem is one of the many uses of the recovery seed...
3487  Bitcoin / Bitcoin Technical Support / Re: forgot the seed on: August 29, 2017, 11:15:26 AM
created a wallet on my phone. сделал скриншот семя, and the son has formatted the phone
, remember the password, remember the name of the purse, and the number to which you can send BTC .... what do I do help




no backup of your phone... there is a code Qr photo




First of all, move this thread to the support thread of the alternative client you're using (the main tech support thread is for the core client). Secondly, don't put ???russian??? words in your question or most people won't understand your question...

As for your question, if you only have the passphrase used to encode your wallet, the name of the wallet and the address, there is little to no chance of restoring your wallet.

In order for you to restore your wallet, you either need the seed phrase (or any other sort of recovery phrase generated by your wallet), a list of private keys or at least a part of the wallet file...
Sorry to bring you the bad news.

If you wallet helt a significant amount of BTC, i'd personally shut down the phone and take it to somebody who knows how to scan the phone's storage for deleted files... Maybe you get lucky and find the wallet file, but don't get your hopes up.
3488  Economy / Service Announcements / Re: [ANN] ChipMixer - mixing reinvented on: August 29, 2017, 08:46:27 AM
just curious, am i receiving someone else dirty coins after the mixing?

There is definitely a possibility that this could happen. But through the use of mixing your coins with chips you are significantly reducing the risk of this happening. There is very little chance anyone can just look at blockchain records and figure out that this chip belonged to you, and is cashed out to x address. There is even less chance of you being accused of using other people's dirty funds when you use chipmixer.

Even if you do find yourself receiving someone else's "dirty" mixed coins, it's not your fault. You can easily prove that your coins were mixed(chips come in regular sizes, makes this easier to prove as well).

In the end, almost all bitcoins can be traced to "dirty" activity. There is really no clean bitcoin if you think about it. If you receive a bitcoin transaction from someone there is probably just as much a probability that the coins are "dirty", and it'll be easier to trace than if you used a mixer.

I agree with most of your post, however, having unconfirmed inputs in a regular size does not prove they were mixed by chipmixer at all... I could easily use some of my unspent outputs in a transaction that generates new outputs with the exact same value as chipmixer's chips...
The proof is the letter chipmixer can give you, signed by them... However, as it has been discussed before, it's not completely sure a judge will allow a signed letter by an anonymous mixer as valid proof.... I know the courts in my country are very bureaucratic and not tech-savvy at all...
3489  Bitcoin / Hardware wallets / Re: Trezor vs Ledger nano S. on: August 29, 2017, 08:43:05 AM
Trezor better UI and features.  Ledger more secure.

Is this your personal opinion, or is there a source to back this claim up? Personally, i like the ledger native UI better than trezor's, altough they offer similar functions. As for security: are there unpatched security flaws on the trezor???
3490  Bitcoin / Electrum / Re: Bounty [Electrum Wallet] on: August 29, 2017, 06:11:07 AM
Like HCP already said: it would be best if you contacted walletrecoveryservices on this forum.

If, for some reason, he cannot help you, i can always take a swing at cracking the password... However, i would only be willing to do this if you had a reasonable idear what your password look like (length, which characters have been used, likely candidates,...), cause otherwise i would just burn cpu cycles with allmost 0 chance of getting the job done.
3491  Bitcoin / Development & Technical Discussion / Re: Is BIP38 encryption of private keys bruteforcable? on: August 28, 2017, 11:44:36 AM
I watched the following video on Youtube and it is scary how weak any passphrase is as a seed for brainwallet:

https://www.youtube.com/watch?v=foil0hzl4Pg

That makes me wonder if by the creation of paperwallets and encryption of privatekeys with a "weak" passphrase (I have no idea what would constitute a strong passphrase) we run the risk of accidentally found paper wallets with encrypted private keys being brute forced by the knowledgable finder of such a paper wallet?

This thread should satisfy your curiosity: https://bitcointalk.org/index.php?topic=1014202

If you found it TL;DR, here's the bottom line:
A member put 1 BTC onto an addres whose private key was bip38 encrypted, he posted the encrypted private key + the fact that the password was only 6 letters. Later on he even gave a couple of clues about the password.
Two years later, he closed the contest and disclosed the password to be "zLwMiR", the price remained unclaimed (nobody succesfully bruteforced the password in 2 years, even with the prior knowledge the password was only 6 letters long).

So, if you pick a reasonably strong, completely random password, you should be relatively secure... Offcourse, if you're going to load your paper wallet with 1000's of BTC, you're giving a brute forcer a very big incentive to crack your passphrase...

3492  Bitcoin / Bitcoin Technical Support / Re: Transaction blocked ... on: August 26, 2017, 04:45:16 PM
Now my electrum wallet is blocked lol

You know it is write '' synchronizing '' and after few minutes it is write '' server is lagging ''.

What can we do whn we got that ?

Let me know

THANKS Smiley

Just click on the orange button in the right bottom corner and manually select a different server.
3493  Bitcoin / Bitcoin Technical Support / Re: Blockchain Unconfirmed transaction since yesterday paid good fee too on: August 25, 2017, 09:28:14 PM
How much fee did you pay? You know fees must be at least 5% of the amount now until Lightning Network. Hope your tx works you can also use an accelerator.

The fee has nothing to do with the monetary value of the output, only with the size in bytes of the transaction.

The op payed 175 sat/byte. This is way to low since the optimal fee has been +500 say/byte all day today

@op: you can try viabtc's txaccellerator.
3494  Local / Nederlands (Dutch) / Re: Bitcoin transactie al 24 uur met 0 confirmations? on: August 25, 2017, 04:59:07 PM
Hallo,

Mijn Bitcoin transactie met ID 0633c1eaa7360b138d4f50f43dfc2c9c10d0294e3695a668a2a1fdac13637f86 is al 24 uur unconfirmed. Het ligt niet aan de fee want die is net zo hoog als normaal en dan lukt het wel altijd binnen een aantal minuten om confirmations te krijgen.

Kan iemand me helpen? De bitcoin accelerator van ViaBTC werkt niet want dan staat er telkens "Submissions are beyond limit. Please try later"

Waarom denk je dat het niet aan de fee kan liggen? Je hebt een fee van 157 sat/byte gebruikt terwijl op dit moment 510 sat/byte nodig is om 95% kans om in een van de volgende 3 blokken te zitten te garanderen...

https://bitcoinfees.21.co/

Je bent wel correct bezig wat betreft viabtc... Gewoon blijven proberen tot er een plaatsje vrij is in hun queu

Mij is altijd verteld dat de fee niets te maken heeft met het bedrag.
Maar de hoofdreden dat ik denk dat er niks mis is met mij fee is omdat het 9 van de 10 keer snel lukt met deze fee bij mij.

Maar ik zal blijven wachten en af en toe op viabtc het blijven proberen

De fee heeft te maken met de grootte van de tx (in bytes), en heeft dus idd niks te maken met het getransfereerde bedrag. Hetgeen wat je gemist hebt is dat de optimale fee constant veranderd. Vandaag kan 500 sat/byte noodzakelijk zijn, terwijl volgende week 250 sat/byte meer dan voldoende is... Heeft te maken met de fee van de andere unconfirmed tx's in de huidige mempool...

Als de top 3-5 Mb tx's in de mempool een gemiddelde fee hebben van 500 sat/byte, zal je dus 501 sat/byte moeten gebruiken om een redelijke kans te hebben op een snelle confirmatie.


En waarom is deze veel kleinere transactie met naar verhouding enorme fee niet confirmed dan?

d2da1911b6b217362b9777e1eaa93711b5aeb58096a06994cb7acb5941ffd6df

Ik heb momenteel een tx met >450 sat/byte unconfirmed... Deze heeft dus veel meer prioriteit dan die van jou...
3495  Local / Nederlands (Dutch) / Re: Bitcoin transactie al 24 uur met 0 confirmations? on: August 25, 2017, 04:25:00 PM
Hallo,

Mijn Bitcoin transactie met ID 0633c1eaa7360b138d4f50f43dfc2c9c10d0294e3695a668a2a1fdac13637f86 is al 24 uur unconfirmed. Het ligt niet aan de fee want die is net zo hoog als normaal en dan lukt het wel altijd binnen een aantal minuten om confirmations te krijgen.

Kan iemand me helpen? De bitcoin accelerator van ViaBTC werkt niet want dan staat er telkens "Submissions are beyond limit. Please try later"

Waarom denk je dat het niet aan de fee kan liggen? Je hebt een fee van 157 sat/byte gebruikt terwijl op dit moment 510 sat/byte nodig is om 95% kans om in een van de volgende 3 blokken te zitten te garanderen...

https://bitcoinfees.21.co/

Je bent wel correct bezig wat betreft viabtc... Gewoon blijven proberen tot er een plaatsje vrij is in hun queu
3496  Other / Beginners & Help / Re: BTC Transaction Accelarators on: August 25, 2017, 12:10:57 PM
I've come across some transaction accelerators posted on form. How do these work? Are they scams?

if you're talking about the bitmain or viabtc accelerator: they are legit

viabtc and bitmain have a large mining pool (they own a reasonable percentage of the network's hashrate). They both created a web service in which a bitcoin user can make a request to prioritise their transaction on the pool's mining node.

With a higher priority, there is a larger chance the user's transaction will be added to the block either viabtc or bitmain is currently trying to solve. If their transaction is in a block, and either of these pools find a hash that is lower than the current diff, the user's transaction is confirmed.

If you're talking about other services (like transaction accelerator services offered on this forum), i guess at least 90% of them are using either viabtc or bitmain (or both).

However, there are a couple users like Quickseller and macbook-air that have push privileges to other pools, so if they offer a transaction accelerator service, they're also legit, but they don't use the free tools offered by viabtc or bitmain.
3497  Other / MultiBit / Re: Unable to send bitcoin plus weird fee on: August 25, 2017, 12:03:12 PM
I just left it and it is getting confirmations.
Thanks for your help.
Send me your bitcoin address, I will send a few bob in thanks.

cheers  Grin

That was fast Smiley
A tip isn't really necessary, but always appreciated, my tipping address can be found in my user profile: 1MocACiWLM8bYn8pCrYjy6uHq4U3CkxLaa

In case you want to tip NeuroticFish, his tipping address seems to be: 1FiSh48zo6PNaxBGEmqfuDB3XezxaXwbXQ
3498  Other / MultiBit / Re: Unable to send bitcoin plus weird fee on: August 25, 2017, 11:29:31 AM
All seems in order, the transaction I want to process is listed as "Unconfirmed Parent"
Details attached as well
Not ure what the next step is to process this transction
https://blockchain.info/address/16W3griN8nV39V2UfJm39zkSBFQ4ReJRFu






you have 2 unconfirmed transactions, the first has a very low fee of ~11 sat/byte, you used the change from this unconfirmed, low fee, transaction to create a new transaction (also having a very low fee of ~15 sat/byte).

You can solve this problem by submitting the parent transaction (11 sat/byte) to viabtc's txaccelerator (like i told you in my previous post)... wait untill viabtc puts your tx in a block and succesfully mines it, then re-broadcast the child transaction (15 sat/byte). Once it's rebroadcasted, also add it to viabtc's txaccelerator.

This procedure will probably take several hours, but it has a *reasonable* chance of succeeding, since both your fees were > 10 sat/byte (which is the minimum fee to get accepted by viabtc).
3499  Other / MultiBit / Re: Unable to send bitcoin plus weird fee on: August 25, 2017, 09:36:27 AM
Just reset the blockchain and now the transaction list accurately reflects the amount sent and proper fee.
Will wait a while and see if the coins go through now

glad you got it fixed, however, your old multibit did pick a fee of < 15 sat/byte, while at the time of writing a fee of 510 sat/byte would be recommanded if you wanted to have a 95% chance of getting into one of the next 3 blocks (source: https://bitcoinfees.21.co/)

You can be lucky and see your transaction end up in a block in several hours/days, but don't be supprised if it stays in the node's mempool untill they decide to drop it...

I'd personally recommend to use the viabtc txaccelerator: https://pool.viabtc.com/tools/txaccelerator/ (read their full FAQ/TOS before using them, or you will probably won't be able to submit your tx due to the fact they only accept a certain amount of tx's per hour)
3500  Other / Beginners & Help / Re: Bitcoin price on: August 24, 2017, 11:32:37 AM
The Bitcoin price is expensive? cheap? or just to go with other coin? Undecided

If you could afford or buy 1 bitcoin easily, then it is not expensive for you. But one thing is clear bitcoin has a expensive price like $4176, it is not cheap price. Although it is your choice if you wanna go with other coins, i prefer to do trader with all altcoin. Because sometime we are not in a position to buy 1 bitcoin, than other coins have cheap price, so better to trade with them.

I really fail to see the point here... Why would it be better to trade with, for example 8 LTC than to trade with 0.1 BTC? They're both worth ~$400 when i would trade them against FIAT... They both have the potential to rise/fall in value,...
The only difference would be that at this exact time, the miners fee you would pay to create, broadcast and confirm an equally large transaction on the BTC and LTC network would be much smaller in FIAT terms when transaction on the LTC chain compared to the BTC chain.

Bitcoin isn't something physical... It's perfectly fine to own 0.001 BTC, you don't have to own a full BTC in order to be able to use it...
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