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5581  Bitcoin / Electrum / Re: Noob question about Electrum on: June 02, 2018, 05:33:10 AM
that is not a risk because there are ways of solving the problem if you paid a lower fee than you should have and had your transaction stuck. and Electrum and Bitcoin core are already marking the transactions as RBF by default which makes that easy to solve.
I mean, when you buy bitcoins (from an exchange in this case) in some cases you don't have an option to choose the tx fee of the withdrawal request.
If this was from December, when you directly use the invoice deposit address from the mixer (Buy Bitcoins -> Send to Mixer -> Your Wallet) and it didn't make it in time, that's the risk (for a newbie like OP).
But as I said It may never happen again after the recent updates, so, it's not much of a subject for discussion.
5582  Economy / Speculation / Re: Someone pumped the price of BTC Today: approx 250 USD on: June 02, 2018, 03:36:33 AM
Bitcoin community should consider this as a major issue.
Oh my god, we should panic!

The price just got pumped up by 3%! expect it to drop by 5% after the dump.
This is one hell of a price manipulation by the Whales, there's no way that this is normal. [/sarcasm]

After the first few replies, I can't seem to understand why someone still take the time to type with that kind of reply, you just simply whispered out "Nuke my posts please".

By the way, I didn't see where OP stated the $2b approximate for the lame "pump report".
-edit-
Saw it:
I was wrong about the 20 Billion and deleted it!
5583  Bitcoin / Electrum / Re: Noob question about Electrum on: June 01, 2018, 10:25:58 AM
Or just skip the whole Wallet1 and Wallet2 setup altogether... and simply go: Buy Bitcoins -> Send to Mixer -> Your Wallet
Good shortcut, except the risky part during times when unconfirmed transactions are clogging the network and normal transaction could take more than a week.
Today, it's risk free even for a newbie.
Maybe I'm missing something obvious, but just now I can't imagine what the point is.
There is really no point here unless you're strictly conscious about your transaction and asset's privacy not against the regular users but the "Big Guys".
Otherwise, someone like me won't be able to tell if those bitcoins from an address belongs to you (unless if motivated/payed to do so).

Bitcoin was designed not to be anonymous,
But not re-using an address can help you keep your privacy safe, do not disable "Use Change Address" either.

If you wanted to be "slightly" anonymous, do the mini-mixing yourself by utilizing all of the addresses in another Electrum wallet.
Or just use a mixer service to skip the hassle.
5584  Bitcoin / Project Development / Re: Private key (privkey) hunters - unite! on: June 01, 2018, 07:28:59 AM
Why are people still doing this, if the probability of finding a private key that is used, is almost zero?
-snip-
Yup, by brute-forcing the key, the chance to hit a collision is close to 0.0000000000000000000000000000001%. Wait,

No, what they talking about (in this thread) are those neglectfully stored wallet.dat files, private key backups, paper wallet images or other forms of backups which potentially have funds.
History can tell that some people are stupid enough to store those (not only wallets but passwords and sensitive info too) directly in the internet without "hiding" the files with a disguised file name, file type, etc.

This one for example:
Found more than 10 wallets with a positive balance without any password protection. Not entirely sure how or why you come up with the idea to put your wallet.dat in your public Dropbox folder. Those were the days...

@OP, this isn't "hacking" and... use this to display the image (the link must be the image's direct link that ends with ".png/.gif/.jpg"):
Code:
[img alt=img height=420]https://i.imgur.com/PrBSxN8.png[/img]
5585  Bitcoin / Bitcoin Technical Support / Re: Strange recovery / password phrase on: June 01, 2018, 04:27:05 AM
Before thinking about the email if it was something else, ask yourself if you're expecting an email regarding a passphrase.
You might be wasting your time on that.

Emails containing malware and links aren't "that" rare specially if you're actively using that particular email address as a contact on websites that requires registration or subscription.
Can you tell us about your email address' info (not your email address) if it contains a name which is known among Bitcoin users like "Satoshi", "Nakamoto", "John Mcafee" etc because those are often targeted by malicious email senders.
5586  Bitcoin / Development & Technical Discussion / Re: SoftFok doubt on: June 01, 2018, 03:35:56 AM
You have to code for where you want it to fork at.  Take a look at bcash code to see how they did it.
Bitcoin Cash is a Hard Fork, a valid example of a Soft Fork is SegWit which has some software changes that didn't required a new chain upon its implementation.

I can't further help the OP with this, because I'm not well informed (for now) to the "technical side" of Soft-forks/Hard-forks as well, but this link may help: https://en.wikipedia.org/wiki/SegWit
5587  Alternate cryptocurrencies / Mining (Altcoins) / Re: ETN network need GPU miners help on: May 31, 2018, 01:32:24 PM
For others who didn't understand the quote:
They needed help because of the difficulty wasn't adjusted right after changing the algorithm.
And now since those ASICs aren't capable of solving the new algo as quickly as before, the current hashrate cannot keep up with the difficulty which makes the
Quote
blocks are taking substantially longer than usual (hours rather than minutes) while the network adjusts.

What bugs me is: where the hell did those extra 200,000ETN per block (if mined under an hour) came from? From the dev team's wallets?
So: 26 blocks x 200,000ETN = 5,200,000ETN at most.
Aside from the "Mining Reward" from their Mobile miner, just how many ETN does Electroneum development team have?
5588  Bitcoin / Development & Technical Discussion / Re: Who network detects that block is invalid on: May 31, 2018, 12:05:35 PM
Those were validated by all of the nodes via consensus, means "the more, the real~er".

In the end, all other nodes will invalidate that edited block because your node is the only one "voting" that block 3c is valid.
If someone try to make a transaction that uses an input from that block, it will just return with an error like "invalid missing inputs".
5589  Other / Meta / Re: Stake your Bitcoin address here on: May 28, 2018, 08:24:21 AM
-----BEGIN BITCOIN SIGNED MESSAGE-----
Starving_Marvin
28-05-18
stake my btc wallet here please
-----BEGIN BITCOIN SIGNATURE-----
17ExP7LLa8FqZkRtD9XXZ2GjExutRoSFjB
-----BEGIN SIGNATURE-----
H5fItgkSPgr/LRLwv4vjZQeRrVkSA4eBwsD2T7Ms2zaHWJl4VofIjiMvRNp1j6rgVqEMH9VGvDr6bIaGr/jbtqE=
-----END BITCOIN SIGNED MESSAGE-----
Quoted and Verified.
5590  Bitcoin / Development & Technical Discussion / Re: How to handle deposits on a turn based multiplayer game on: May 26, 2018, 06:05:47 AM
It's a game so I assume that your target market would be teens and young adults?
You don't necessarily need to worry about people who didn't want to deposit for the types of persons at that age and "game preferences".

Just make use of the 3rd party service providers that they probably use and trust like Bitpay, Coins or others as a payment channel to buy "game credits/cash/coins".
With this, they wouldn't really need to trust the game, they just practically "bought" points. (every Game Providers do this)

You might wanna change the "betting" into "reward" by not using bitcoins directly as bets.
If it does, this will just look like a gambling app disguised as a game, and the available market will be slim.

Hope this helps.
5591  Alternate cryptocurrencies / Mining (Altcoins) / Re: Need help!h110 pro btc+ problem on: May 24, 2018, 03:01:54 AM
Try to minimize the possible problems by deduction.
  • Reshuffle the GPUs and see if GPU 4, 7 & 12 are fine on other slots.
  • Look at the performance of the normal cards to the PCIe slots where those slow GPUs are previously inserted.
  • Do all GPUs got the same bios versions and OC settings?

These are pretty much the basics, other possibility is PSU's connectors and rails setup might affecting the problematic GPUs.
5592  Bitcoin / Project Development / Re: Bitcoin Quest - a brain twister, by solving it you get bitcoins! on: May 21, 2018, 01:54:12 PM
Seems like only one seed left https://blockchain.info/ru/tree/348451340
But i dont have other words yet.
Look again, all prices were now claimed  Undecided
Seems like after the discovered seeds got posted, the others became too easy to connect by crossing out the used words (that has no "x2" mark), especially for the 5x consecutive solo winner, but hiding the words is also to his advantage.

Connecting them is too tricky because the arrows aren't exactly pointing to the direction of next word.

Theoretically, judging from the total number of words, someone can write a software to bruteforce the possible seeds based on the words from the image. 120~ish, that's a very small library compared to BIP39's or even Electrum's Word list.
Just a possibility, never mind.

Ready for the second round!
5593  Bitcoin / Electrum / Re: The wallet itself made two transactions! on: May 21, 2018, 06:03:04 AM
What about the vulnerability, when coinciding cases of opening a malicious site and purse at the same time?
Aside from the vulnerable versions, double check the site where you've downloaded your Electrum.
There are couple of fake sites which are almost identical to the original electrum site, excluding the recently taken-down electrum.com (not identical but claiming to be legit) which offers malware electrum downloads.

The official site is: electrum.org - No other alliterations, subdomains or url extensions.

If you want to use Electrum, create a new mnemonic SEED phrase using the application itself, offline/online.
Any pre-generated SEEDs can be compromised during the creation or transfer, its security flaw wasn't brought by electrum.
5594  Bitcoin / Electrum / Re: Electrum stuck on sync..transaction unknown on: May 18, 2018, 03:51:49 AM
Just wondering if there is any possible way around this and I can recover the coins or if it's 100% lost and just have to deal with it. Annoying amount of money but nothing serious.  Have a brand new laptop that I can use, just skeptical electrum will fail me again.
Depends, is your electrum came from the official site? (electrum.org)
And... your version has a vulnerability that can potentially compromise your bitcoins if being actively used.

The mnemonic seed can also leads to different format/"types" of address sets by setting different derivation path.
5595  Bitcoin / Bitcoin Technical Support / Re: please help with xpvt key reward on: May 17, 2018, 08:18:10 AM
test key

xprv9xyQEZakyfuyCRGF1moJNatpGDAgMS4hgctAgWU4RNw664qCz6agreZParHx6G24td48SZKnmK8 ppSVMvmyBuTy9L4poDhwgm9aR9GukgQW
I see, your problem is: Every wallet you've used can't seem to import your master private key, right?
Use Electrum: electrum.org
I've tried your test key on Electrum and I think I found the culprit.

At first, it appears to be in the correct format while Electrum's next button is still unclickable, but I noticed that there was a hidden space somewhere between "nmK8" and "ppSV".
After removing the space, the restoration process went through.

here's a sample address from that test master private key: 192CfrTf5cxGSZX6AjLv6jikU4HVJRQ8bG
Signed by me:
Code:
-----BEGIN BITCOIN SIGNED MESSAGE-----
May 17 2018 nc50lc I am able to restore this sample wallet from helpmemykey's thread.
-----BEGIN SIGNATURE-----
192CfrTf5cxGSZX6AjLv6jikU4HVJRQ8bG
IIXEgwgF0NgDMqnOjJmpld5C3cB8MW58PDf1mwAQPYOxMVIfp8Ep4T0FDeQFIte6yM7pdeSbokKgl3L0nVeDkNc=
-----END BITCOIN SIGNED MESSAGE-----

It seems like the output file or text of the master private key dump of your previous wallet produces an invisible space.

Try to copy your other master prv keys to a text file, find a(the) space and delete it.
Copy the fixed master private key then, restore your wallet.
And here's an easy way to find where the space is: double-click the xprv key, the space should be after the highlighted characters.
5596  Bitcoin / Development & Technical Discussion / Re: Bachelors Thesis - How much hashpower do i need for 600 Million transactions /y on: May 17, 2018, 04:08:19 AM
Would it be sensible that assuming setting up only one mining center with redundant backup ( geographicaly located in a different part of germany) so that no competition must taken into account?
If that's the case, a single Pentium4 PC can process 600 Million transactions per year; in exaggeration, set the difficulty to 1 and you can mine with an abacus.
The problem with that setup is it only requires a single person or group to manage the (centralized) miners which must be trusted by the whole network.

Of course, we will benefit from no/low transaction fee, low network power consumption, anything you can think of.
But with that, if a single corrupt person or an attacker got his hands on the miners, the whole network will be the victim.
Everyone can't even trust the most trusted person in the world: Dave.

Bitcoin was designed to be "trustless" or decentralized, the ledger must be "copied" exactly and verified by each of the nodes, new blocks must be verified by them, and "mining" must be done in a decentralized manner too.
All in order to be "trustless" without the requirement of a middle man or a centralized operator.
5597  Bitcoin / Project Development / Re: Bitcoin Quest - a brain twister, by solving it you get bitcoins! on: May 16, 2018, 03:47:52 PM
This sounds like fun. Am I too late? I found a number of words.
No one has solved yet. All prizes are waiting https://blockchain.info/tx/8d10e6d82565c668c08761c08c2c80e65d7fdf18139147495dc4f26f949f2932
Actually, I almost found all of them (even the hidden ones like "rotate").

Try this:
Using Photoshop, create two transparent layers for markings and another one for connections. That way, it will be easier to organize.
The real problem is following the arrows or finding the right arrow-like shapes nearby each words, fake words and guides are tricky.

I think not all words on picture could be in keys. You can ask author in telegram group.  
Seems like, yes.
Some words' strokes are similar to the unedited drawing, it could be those.
5598  Bitcoin / Development & Technical Discussion / Re: A thought experiment: PROVE you own a bitcoin on: May 16, 2018, 07:11:00 AM
I don't have bitcoins. I am simply able to control and use the private keys associated to my UTXOs that give me the opportunity to transfer thouse outputs onto other addresses that will become new UTXOs for the next guy on the blockchain.
Again, I have NO bitcoins. I HOLD keys Wink
"my UTXOs"; UTXOs contains Bitcoins, "my" means yours: You have Bitcoins, In other words. Tongue

Alright, you're trying to say that there are no bitcoin addresses in the network which most of us are claiming as "in their possession" and the private keys are the only "controller" of the funds.  Smiley
5599  Bitcoin / Development & Technical Discussion / Re: POW vs. POS on: May 16, 2018, 06:49:09 AM
POW - Half pre mined and rest of the coins will be mined by miners by validating the Transactions.
POS - all coins pre mined before add to circulations
No, leave the scamcoins and their conspiracy theories out of the discussion.

There's no such thing as "pre-mine" that's just the early stage of a coin which only the developers and early adopters are the only miners in the network.
Scamcoins/Shitcoins usually use that as an excuse to their Pump and Dump scam: 50% Premined for future developments, etc.

One scamcoin modus for example: Developers have secretly mined the earliest blocks until they reached a sufficient amount enough to pump the price once it reach the exchanges, when the investors flock in, they will dump the remaining coins in their possession ~dirty profit.

And you've mistakenly identified POS as ERC20 Tokens.
5600  Bitcoin / Development & Technical Discussion / Re: A thought experiment: PROVE you own a bitcoin on: May 16, 2018, 05:46:42 AM
Paper Wallet? Show an edited picture of the printed paper wallet with covered private key and prvkey's QR code.
There are too many workaround to fake this like printing a bitcoin-loaded address paired with a random prv key but,
Paper Wallets' private keys are meant to be hidden and offline, the user didn't want to tell others that he own a bitcoin in the first place.

With this, leave Paper Wallets out of the available options.

LOL - on the last two....
No, LOL to this:
Quote from: Spendulus
E. Show the requestor your private key and it's value therein.
Roll Eyes

Other wallets? achow101 already replied with the best answer.
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