Instead of re-hashing the same things the first 2 posters already said, i'll offer an alternative: Why don't you run your own wallet on your server and use it to create new deposit addresses and manage payments? There are 2 good alternatives: 1) Run bitcoind, lock your wallet, use json-rpc queries to make new addresses, use the callback function (walletnotify=path_to_script %s) to detect incoming transactions 2) OR, run electrum as a daemon http://docs.electrum.org/en/latest/merchant.htmlPersonally, i'd prefer the first option (bitcoind), but electrum gives you the possibility to create a watch-only wallet by importing an xpub instead of generating a "real" wallet with an xprv. Since the online machine never touched the seed or the xprv, the worst a hacker can do is steal your xpub and find out which deposit addresses were generated by your store. |
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Hello! I do not understand what's going on with a friend's account. https://bitcointalk.org/index.php?action=profile;u=1983411He recently gave up some money to buy copper. and now you lock him This morning he came in and received a message like this: " Sorry duythan1988, you are banned from posting or sending personal messages on this forum. You have been banned by a forum moderator. You may appeal here: banappeals-w6pquw43@theymos.e4ward.com " I know he's just a hunter, but that does not mean he's banned. he needs a reason. please ! Ok, Firstly, from experience, most longtime members don't believe you if you say you're appealing a ban in the name of a thirth party (your friend). In most (if not all) of these cases, it's the person who writes the appeal that is perma-banned, but this person doesn't want to admit he/she is the one that is banned because he/she wants to play the sympathy card, or he/she wants to continue posting without risking a ban for ban evasion. As for the reason you're banned: i'm not a mod, i'm not an admin, i'm not the person that reported you, but from experience, i can say that in most of the cases, it's because you (or your friend) copy/pasted content. In some parts of the world, plagiarism isn't taken seriously... However, in the US (where the admin is located), plagiarism is a serious offence (you can actually go to jail for plagiarism). Here is a full list of the rules: https://bitcointalk.org/index.php?topic=703657.0Read the post and see if any of these infractions apply to you... I don't know if there is a premade list of perma-bannable offences, but i guess it would contain following infractions: - copy/pasting content - ban evasion - spamming (i think a spammer gets 3 temp-bans before he/she receives a perma-ban) - doxxing the admin |
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I don't really get your question either, like others have asked before: - Are you worried about running out of diskspace
- Are you worried about the amount of data that is being transferred (does your ISP have a data limit?)
- Are you worried about the amount of memory that's being used while running bitcoin core?
Anyways, i'd say that pointing you towards an SPV wallet would be the best course of action... I'd like to recommand either a hardware wallet (in case you have a lot of funds invested in crypto) or electrum ( https://electrum.org/#home) An SPV wallet only downloads the block headers, the wallet only keeps the xprv and the metadata you added... I haven't run electrum in a while, but i guess the total diskpace used by the binary, the wallet and the headers is <100Mb (confirmation needed). Also, the amount of data transfered is small, and the memory footprint is a lot smaller than bitcoin core. The downside is that you won't be verifying the blocks yourself, and you need to be connected to a thirth party electrum server... |
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FYI, Bitcoin Gold also use 10 minutes block interval and previous attack reverse 21 blocks which is far above common minimum required confirmation (which is between 1-6 blocks). In this case, almost all user/services would be affect and the only solutions are another rollback or/and ridiculous minimum confirmation amount are the only solution.
Thanks for the info  The only remark i have is that bitcoin gold isn't equal to bitcoin. It's not because bitcoin transactions only require 1-6 confirmations to be considered irreversible that this amount is transferable to bitcoin gold just because it's codebase is allmost equal to bitcoin (i know it has a different POW). So, the exchange should have done it's homework and asked for more confirms because of the low difficulty (but it's all hindsight, it's easy to give comments on an event that already happened). However, 21 blocks re-mined is a huge attack, i don't think i'd ever require 21 confirmations if i was selling something (nor do i think an exchange should require 20+ confirmations with an average time between blocks of ~10 min), so in the case of the bitcoin gold attack, i would have been scammed aswell (even with my hardware wallet). |
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As bob123 already explained, it depends on the coin. If the coin is weak, the underlying weakness of the coin's blockchain (in this case not enough hash power) can become a liability for the exchange because a hacker can intervene and double-spend some coins. For example the scenario may go like this: first they send some coins to the exchange and immediately spend them (say, buy BTC with them); then they use their 51% power to fork the blockchain at some earlier time and regain their already spent coins. I might be wrong, but I believe that's what happened with Bitrex and "Bitcoin Gold". The only thing the exchange can do in such a case is to delist the altcoin in question.
But in this specific case, i don't see it as a exchange-related problem. Sure, an exchange was used to monetize a 51% attack, but a hardware wallet wouldn't have protected you either. For example: - you were selling irreversible digital goods and accepted "Bitcoin Gold" as a payment method
- you generated a "Bitcoin Gold" address using your hardware wallet
- the "bad guy" funded your address
- You transfered the digital goods without waiting for sufficient confirmations
- the "bad guy" executed the 51% attack, excluding the tx funding your address and including a tx that spends the unspent output used to fund your address
In this case, you would have been robbed, even when you were using a HW wallet... It's not smart to use an exchange as a wallet, but in case of a 51% attack, a hardware wallet isn't 100% protection either... The only difference is that an exchange *might* require to few confirmations for a low diff coin, whilst a private person using a hardware wallet can chose the amount of confirmations arbitrarily |
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The article was TL;DR;... But comparing the use of an exchange as a primary wallet vs the use of a hardware wallet is like comparing apples to oranges.
When you spend unspent outputs that were funding a certain address, you need the private key in order to sign the transaction spending those funds.
In the case of a hardware wallet, the signature is generated on the hardware device. A well made hardware wallet doesn't allow your seed, xprv or any derived key to leave your hardware device ever. A good hardware wallet is completely open sourced to... A good hardware wallet also displays important info about the tx on the hardware device before you physically press a button that triggers the signing of the tx.
Even if you use the hardware wallet on an infected pc, you should be fine as long as you pay attention, and don't "sign off" on a transaction funding the wrong address...
Compare this to an exchange... Do you know how your exchange works? Do you know who can access those funds? They must run a hot wallet to function, so inherently they're less secure than a hardware wallet... It's possible they use a secure setup, but it's not guaranteed. What will happen if they get hacked?
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Well i Pushed the Broadcast button and got an error message telling me that my transaction is rejected by the network..i guess the node rejected me whatever the hell that means...does this mean my coins are stuck...coins wont just dissapear will they? and finally where and when will my coins final destination be? i really hope these coins find there way back into my wallet...and again my status still shows as LOCAL
Im fukin confused..anybody got any good news for me?
Well... If you got a message saying the node rejected your transaction, it probably IS a fee problem (there could be other problems to, but a fee related problem is the most common one). Without actually seeing the transaction, there is no way to pinpoint the exact problem with the transaction. Good news, sure there's some good news  : In a non-technical way, it means that the coins never actually left your wallet. In a technical way, it means that the unspent outputs funding the addresses managed by your wallet were used as input for a new transaction, but since that transaction wasn't succesfully broadcasted, the transaction spending the unspent outputs is not in the mempool of any of the nodes, so as far as the network's concerned: nothing really happened, the transaction sending the funds simply doesn't "exist" (at least from the network's point of view). This statement only remains true as long as you don't succeed in broadcasting the transaction... If you broadcast it even once, the above statement becomes untrue! The only "problem" is that electrum actually keeps the unbroadcasted transaction stored in a local file on your computer. As long as electrum has this transaction in this local file, you'll probably not be able to re-spend the funds... I haven't used electrum in a while, so i don't know if there is a way to make electrum "forget" the transaction that's currently stuck... You can always restore your wallet from seed, but that might be a drastic measure since you'll lose all metadata you added (for example, the comments you added to a transaction or the names you attached to addresses). |
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I agree with AccountTrade, Your bitpay invoice is marked as "Payment Confirming" and if you click on "View payment status", you are redirected to bitpay's insight node... https://insight.bitpay.com/tx/c517192371bb92ace71f9df4c4b78975338119d13068811f23dba8c906285762At the time of writing, their insight node seems broken or down to me... So, my best bet would be: namecheap don't have a clue as to how bitcoin works exactly, they just saw that bitcoin was getting bigger and bigger nowadays... So, they contacted a reputable payment provider (bitpay) to handle bitcoin payments for them. They're probably just using bitpay's api and the only thing they want is a postback from bitpay to their own api telling them the payment has been received and they'll receive the FIAT equivalent of the payment on their bank account shortly. However, when bitpay's node hangs, and they fail to detect incoming payments from their customers, they don't post back to namecheap, and namecheap simply doesn't know you payed your bill. Since they're incompetent, they have no clue that it's actually their payment provider's fault, and not yours... I guess you'll have to contact bitpay's support... They're the ones that generated a new address you had to fund, they're the ones that created the invoice, and they're the ones that don't postback to namecheap when you funded the address they generated. Namecheap probably doesn't know what a transaction actually is, so when you ask them about bitcoin related problems, they're flabbergasted and they had the WRONG reaction to blame you (their customer) instead of admitting they know nothing about the technology they accept as valid payment. |
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I suppose some big miners signed power contracts to get best price. They must consume it or pay penalties.
Same issue with heating or hiring contracts.
Many other elements than price and rentabilty come into play
Sure, if you have a contract, you might aswell use the power you've already payed for... Altough i'd probably try to switch my mining operation to a more profitable algo within the bounds of my current contract if i was the miner. I addressed the issue of heating in the remainder of my previous post (i was still editing it while you quoted me ) |
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6. and some had invested a lot in rigs, power supply, contracts, workshops. If they don't run it all, they loose more money.
7. winter is coming. (I run some rigs to heat the whole house)
You raise a good point, but i don't think i fully agree... 6) Even if you invested a lot, it wouldn't make sense to keep on mining if the amount of ETH you mined (converted to FIAT) is less than the power bill... What WOULD make sense for these people is to keep on mining even if they knew they'd never ROI (get their investment back) as long as the net income of the mining operation was higher than the power bill.. 7) I actually tought exactly the same way a long while ago... However, i have since changed my mind... Sure, you recuperate part of the electricity cost incurred by mining by saving some gas, petrol, wood, electricity,... you would have used to heat your house... HOWEVER, in my own country, the electricity price is currently over €0.25/Kwh. I currently heat my house with oil, and eventough the oil is much more expensive than it used to be 15 years ago, it's still a lot more efficient than heating my house with electricity. If the mining "profit" is only marginally lower than the power bill, it might be a good idear to use a miner to heat your house, but if the "profit" is much lower than the cost, i doubt the amount of oil i saved by heating my house with an ASIC will be proportional to the loss i make by mining. I haven't done the full calculations tough, i guess the cutoff point would be different for allmost everybody... Next to this, most ASIC's are loud, sometimes they're a fire hazard, they might emit toxic fumes, they emit some light (trough their control leds) and ideally they have to run 24/7 (while my heating is only on when my wife and kid are home) |
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If i remember correcty (i haven't used electrum in a couple of months), if your fee is to low or if there is an other technical problem with the transaction you created, electrum actually shows you the error message of the node you were trying to use to broadcast your transaction, so i doubt it's a fee problem... (not sure tough).
I'm thinking in the same direction as ETFbitcoin, are you sure you are connected to an electrum server?
You can try to close electrum and restart it, or click the button in the right hand corner and manually change servers untill you find one that's working for you (like ETFbitcoin already said: the indicator in the right hand corner should be green).
Like ETFbitcoin already said: you can always "save" your transaction locally instead of broadcasting it (you already figured out how to re-broadcast a transaction, IIRC, the save button can be found in the exact same menu you used to rebroadcast), then open the locally saved transaction using a text editor , copy the hex transaction (minus the quotes) and use an online tool to broadcast it (if you use google, you can find at least 5 free online tools to rebroadcast, but if you really don't find one, you can always PM the signed tx to me and i'll broadcast it from my node)... It sounds hard to do, but it's actually pretty easy, you just need a text editor and internet access.
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I'm trying XMR browser mining and you're not kidding when you are saying that "The mining tool isn't 100% stable". Both Chrome and FireFox show errors in the console shortly after starting to mine. Firefox 62: TypeError: Module.asm[_0x15f2(...)] is undefined Chrome 66: TypeError: Cannot read property 'apply' of undefined
at Module.stackSave (cn.js:1)
at ccal (cn.js:1)
at cn.js:1
at _0x3ab6d2 (blob:http://unblur.ninja/7e1cc478-1193-4c4f-a13f-f2910cfe3317:1)
at onmessage Looking at my CPU usage it does seem to work though. ... Now all I have to do is wait. Yeah, i must admit i'm not the person who wrote the browser miner... I used a thirth party app, but even the author clearly indicated it was in beta-phase, so i'm not sure i'll get it fixed  BTW: the script that credits you for the submitted shares runs once an hour, and if less than 5 satoshi worth of XMR was mined, the payout is rolled over to the next hour... I hope everything works, but even in case something goes wrong and you don't get credit for your work i'll be able to manually credit your credit line. Thanks for testing my new payment method |
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The ad is only there because i was testing my new ad rotator, i'll remove it right away Thanks for the feedback, it's really helpfull! Happy if I can help. One last thing, which is just in my view, the sub menu of WALKTROUGHS can be centered a bit also the space between the characters are a bit too big and having a long title like ECLAIR 0.3.5 ON ANDROID 7.0 doesn't look that good. Again it's just my opinion here Otherwise I like the whole idea of the site, hope it works out for you. If I spot another thing I let you know Thanks This last remark is a bit harder to fix, since i'm not a good designer... I'll have to fiddle with the design a bit more to get everything looking nice, so i'll probably do this the next time i do a major change of the layout. |
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~
EDIT: *should* be fixed now, but since i'm at work, i can't really test it out...
Now it's working fine also the link for the NSFW. The only thing that caught my attention was the size of the ad. It's a bit too big for the menu field and it comes a horizontal scroll bar, tried again different screens like 5:4 and 16:9. The ad is only there because i was testing my new ad rotator, i'll remove it right away Thanks for the feedback, it's really helpfull! |
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Just a quick look on the website and it looks like it's "locked" by a message trying to pop up somewhere. It's either the NSFW one or another hidden I did't find. Tried it both on Firefox and Chrome.. same result. here is a view > https://imgur.com/qprRmcCZoomed out to 25% to be sure that it's not hidden outside the frame. No success. https://imgur.com/a/03qfxLxThanks for letting me know.. It's the NSFW message indeed... I don't have this problem with my browser, but it seems some browsers do hang because of it. I'll do a quick fix by removing the popup message altogether and just setting the NSFW to 0 as a starting point. People that want to see NSFW images can do so by selecting the appropriate option on the left hand side anyways. EDIT: *should* be fixed now, but since i'm at work, i can't really test it out... |
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I'm currently expanding the payment methods of my site: https://unblur.ninja and i'm done beta-testing these methods, so i'm opening them up for wider discussion/critisism.
I'm looking for bugs or improvements... I'm not looking to start a topic about the good or bad quality's of the lightning network, any altcoin i accept, XMR, coinpayments,.... I know these technologys have their pro's and con's, i don't want to discuss them here tough... I'd like the discussion to be focussed on the implementation of these technologies instead...
Eventough i don't offer any direct incentive for testing out and giving feedback, the 0.005 BTC raffle is still open, so if you test out my new methods, you have a chance of winning the 0.005 BTC price pot.
As you might realise, such a raffle isn't provably fair (i didn't see a way of making it provably fair TBH), however, you CAN always check if the price pot is still untouched at the time you unblock the image one step further
https://unblur.ninja/image.php?id=79existing payment method 1: pay by lightning networkmake sure you either have a channel open directly with my ln node OR check if there is a route between us, then pick an image that hasn't been unblurred completely, complete the captcha, chose the number of steps you with to fund and click on "generate lightning invoice". Once the invoice has been payed, my lightning-charged daemon immediately picks up the payment, and edits the database (adding the additional unblurring steps you payed for). This process is 100% automatic and has been tested both on the testnet and the mainnet, by myself and at least 1 other client (since i don't keep logs, i don't know if i've had 1 client that made several purchases, or several clients that made 1 purchase) existing payment method 2: open a credit lineBecause i got a question from somebody who refused to use the lightning network, but still wanted to unblur an image, i have added the concept of credit lines. A credit line is a prefunded "key". You can contact me and discuss any payment method. After payment i created a new credit line and added funds to this line. A user could now pick and image, chose a number of steps, click on "pay with other crypto's using an active credit line", enter his/her credit code and click on "pay". The system checked if the credit line was still funded, substracted the invoice amount and edited the unblurring database. The problem with credit lines was the fact that they needed manual intervention from me: you needed to contact me and arrange a method of funding. NEW payment method 3: fund a new/existing credit line by mining XMRI now allow people to fund their credit line by running a mining software of their choice on a machine of their choice untill they have mined enough to fund the unblurring steps they want to make. I don't force them to use "unknown" or "untrusted" mining software, they can pick whatever open source, peer-reviewed mining software they like and use it on whatever machine they like when they want to fund a credit line. The process is quite simple realy: NEW payment method 4: fund a new/existing credit line with altcoinsI added the option of creating new credit lines, or funding existing credit lines with tons of altcoins. In order to do this, i used coinpayments.net. I know they don't have a great reputation, but since we're talking about micro-payments, i decided to use them anyways since they have a clear price structure, good api documentation, a simple POS and support many coins. In order to pay for a credit line, just surf to https://unblur.ninja/opencreditline.php , read the section OPEN A NEW CREDIT LINE WITH CRYPTO CURRENCY and follow directions
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I've purchased goods and services from all over the world with my EU paypal account, i don't see a reason why the fact you opened your account in the UK would stop you from paying a company in the US. is there something i'm missing here? BTW: not volunteering for the job, i won't give away my anonimity for a couple bucks |
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Which OS is the most secure when I want to use a crypto-wallet and make transactions? I heard that Ubuntu, is it right? ubuntu? No way. Ubuntu is one of User friendly distributions have a good community and good support behind it but not known as safe or privacy focus distro at all. It had many security problems during years. Even there was scandals for Ubuntu . last one i know was "Ubuntu Spyware". Mint could be a good choice for anyone new to this area to learn what gnu/linux is. Among the security focus distros the best choice could be tails as NeuroticFish mentioned above. has electrum wallet by default. You can read more here.( https://tails.boum.org/) its just live distro and not recomended for newcomers. And check all distros popularity here. ( https://distrowatch.com) Offcourse, an end user can make the best designed OS vulnerable, or the worst designed OS secure Its not true. you could not,Can not, and will not be able to Secure windows Ever. I'm not going to start a pointless discussion, but I wholeheartly believe there is no 100% secure os. Even the os you recommended has had vulnerabilitys at some point. As you might have noticed from the part of my post you didn't quote, I'm not a Microsoft fanboy either. As a matter of fact, I maintain Linux servers as my daytime job. I still stand by my earlyer statement... For example: I'd rather run a tool on a windows server that has been maintained by a skilled windows sysadmin that had enough time and funding to do and maintain a proper setup compared to running a binary on a Linux box that has been installed and used by a newbie that made a lot of mistakes (like running everything as root, installing unknown binaries, not updating, no firewall,...) |
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--snip--
Hello thnx for ur answer,
i have stop using it now because of too many bad sectors but it was in use for more than 5 months after the format.i think i had used recuva too but active file recovery i think its more proffessional .
maybe u remeber the name of the company ??
Which company? That being said: if you've used the HD for 5 months and it already has a lot of bad sectors, i don't think the odds are in your favour here... I'd personally suggest you to use dd (like i said in my first post) to save as much data as you can, then start looking for the seed phrase or an other backup method... If nothing works, it doesn't hurt asking for a quote from a professional disk recovery company... The odds of recovering a file on a broken disk that has been used for at least 5 months are small... If you get a quote from a professional file recovery company, it's up to you to decide wether the costs outweigh the benefits... Also, i'd suggest finding a "no cure, no pay" company... That way you can minimise your costs in case they can't help you either. EDIT: https://en.wikipedia.org/wiki/Data_erasure#Number_of_overwrites_neededIf i'm not mistaking, the department of defence usually overwrites a disk with 0's, then with 1's then with random data... At this point, nobody (not even a 3 letter agency) should be able to recover any data. Depending on the usage of the disk in the last 5 months, several sectors *might* have been overwritten numerous times. On the other hand, if you just used the disk to backup a couple of very small files and never touched it afterwards, you might have a fighting chance. |
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Hello,i had a wallet on my old pc and be mistake i send some ltc to the old one.The problem is that i dont have backup and i tried to recover some files (exodus support) told me with a program a friend suggest me the active file recovery but with no results.
the files im looking for is seed.seco and the hard drive have already used and formated one more time.
Any suggestion?or any better recovery tool to use?
**the hdd is toshiba
thnx in advance
First of all: stop using the disk... Any sector that has been overwritten is more or less lost... I've heared about 3 letter agencies that can potentially recover an overwritten sector, but for a normal guy on a normal budget, you should consider sectors that have been overwritten as lost... I'd recommand to use dd to make a copy of all sectors on your disk before you try anything else. Afterwards, i've heared people share success stories of recuva's recovery software... |
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