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There is one thing i wish to add:
~Bitcoin~'s proposal is perfect. Using the sourcecode of bitaddress.org on a clean, air-gapped computer is safe. The only downside on this is: if you wish to spend your funds, you usually sweep the private key (read the private key into a desktop/mobile wallet). As soon as you've swept your private key, it's compromised, and you should discard the paper wallet (or at least, never use it again, you should never actually erase private keys).
An option if you want a wallet with wich you can actually make outgoing transactions in a relatively easy way is installing a wallet on an airgapped, offline, computer, and installing a watch-only wallet on an online computer (a wallet that doesn't have your private key).
The wallet on the online computer is used to generate transactions. The transactions are printed or saved on a usb-stick and transported to the offline computer for being signed with the wallet containing your private key.
The signed transaction is then transported back to the online computer to be broadcasted with the watch-only wallet.
I've used electrum for this purpose in the past...
- install electrum on a clean, offline, computer... Generate a new wallet (write down the seed)
- export the xpub, put it on a usbstick
- install electrum on an online computer, import the xpub
- generate a transaction from the online computer, save on a usbstick
- transfer to the offline computer, sign with electrum, move signed tx to the usbstick
- broadcast it from the online computer
So, to sum it up, in my opinion:
- paper wallet = wallet for long time storage... A deposit address you use to dump your coins into that is really safe and easy to generate
- offline wallet = wallet that can still be used to generate outgoing transactions in a relative easy way, but is harder to setup
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I could potentially buy about 4 BTC a month if i used my full wage, tax returns included in a month with sufficient payed overtime. Offcourse, after house payments, insurance, food, clothing, gas, electricity, i could probably buy 0.3-0.5BTC with the unused money.
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IF you're using a great faucet rotator, and a fast typer, i guess you could do 100 faucets/hour (36 seconds per faucet)...
10 hours of faucetting * 100 faucets/hour = 1000 faucet claims per day.
I've seen some faucets giving you 500 satoshi's per claim, but most seem to be a lot lower... Let's assume you've built the perfect rotator, and you can claim 1000 faucets @ 500 satoshi's => 10 hours of working, and you've "earned" 500.000 satoshi's = 0.005BTC = 3 USD at current preev rate!!!
I've done the math about altcoin faucets in the past, and most of them actually pay less than bitcoin faucets (after trading the altcoin to btc).
Added during my last edit:
As a conclusion: unless you live in a country where minimum wage is less than 3 bucks a day, you're better off applying for a job delivering pizza's or working in Mcdonalds. You'll probably make more each hour than you'll make with a full day of faucetting.
Just my personal opinion tough.
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Can someone just quote this message here:
14Xu5G3fqSrJvT2d5p2Bohcs2CoCuv9TTt
Im trying to work out how to sign an address in blockchain.info. They seem to have updated site and i cant find the more options bit or options... whatever it is.
here you go, a quote... IIRC, there was a thread on bitcointalk on how to sign messages with blockchain.info, just to lazy to look it up right now  |
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Bro can you find me realiable bitcoin to unionpay, or payza to unionpay exchanger please? I'm going to buy mobile phone with this money, I need it Wish i could help you out, but unfortunately, i've never exchanged from or to unionpay or payza, so i couldn't really recommend you a site... Maybe some more experienced members could help you out? |
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I tried looking on the bitcointalk account worth checker, but it didn't show me this. I'm asking because I was denied from a dignature campaign for a lot of low quality posts.
How is quality judged and how can I improve it?
bots can't really tell if quality of posts are good or bad. you should do it yourself, check your posts if its on topic and not just posting just to troll or whatever. put some sense in your post, don't think of posting as a job Agreed. What i also consider (very) low quality posts: - people that don't read the full thread before they answer... Thus giving answers that were already posted by a different member - illegible posts |
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Hi, guys.
I'm here to ask that if unichange.me is legit or scam? I've seen good reviews about them, but I just wanna make sure.
I don't want to lose my money
Please write your opinions. Thanks It's an exchange. Many exchanges that were legit for years suddenly collapsed, disappeared, got "hacked" or straight out scammed their users. So even if everybody loves unichange.me, you should still be cautious! That being said, using the search function: https://cse.google.com/cse?cx=016660200577587308545%3Aesf40ml9aag&ie=UTF-8&q=unichange.me&sa=Google+search#gsc.tab=0&gsc.q=unichange.me&gsc.page=1There were 6 pages filled with results, and the only negative quote i could find was this one: https://bitcointalk.org/index.php?topic=991118.msg10795536#msg10795536 (i did a quick browse, maybe an in-depth reader of all search results could dig up more negative remarks, i don't know) The golden rule would be to try them out with small amounts, and always withdraw everything as soon as the exchange is done (never leave fiat or crypto currency on an exchange longer than you need to deposit, exchange and withdraw everything) |
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hello again yobicode
YOBIT90B71D287680D6CE668F6CPURE
YOBIT05570A58327C9AD852E935PURE
claimed them... Thank you very much  It was an extra 61 pure on my account, but i just liked to try and claim them, which worked perfectly! |
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Then I guess I am safe as only my mother were writing down the words who does not have a clue what bitcoin is, nor a bitcoin wallet or a pin code and a security card. I put that recovery sheet in some safe place in my house but also put these words on a document on my Linux PC which is safe 100% and add a strong password to it (bruteforcing it would need 536 years at least). No one knows my security card which is much more than 4 digits, it ask for 4 random characters while I am sending a transaction to validate it so its pretty secure.
I guess I can sleep well now, thank you all.
It all comes down to these two things: Make sure nobody ever steals the piece of paper where you've written down your 24 seed words AND make sure nobody steals both your HW.1 + the security card (the one with the whole alfabet translated into different letters). Everything else is replacable, but if they either have the piece of paper or the physical device combined with the security card, your funds could be gone in a couple of minutes (altough, in the second case, they'll need a way to brute force your device, wich is a pain in the ass since it's wiped after a couple of tries, but i wouldn't consider it impossible)  I would personally advice agains storing the seed words on a digital medium, but it's up to you wether you follow the advice or not... |
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They don't even need a Ledger to steal your coins if they have access to your 24 word seed. They can import it in any software wallet that supports the format and launch the wallet from there.
I don't have a Ledger myself, but the 4 digit security code you are talking about, did you set it yourself during the setup process? If so, that infromation will be lost when you enter the seed into a new wallet, thus allowing spending.
I can confirm your suspicions. The 4 digit security code, nor the security card is needed to restore your wallet. The pin number is only needed to open your wallet, and can be choses by yourself, the security card is linked to the hardware wallet itself, but only the 24 words are needed in order to generate the xpriv. In other words: -if somebody steals your ledger, but they don't have the pin nor the security card: you're safe. -If somebody steals your ledger, and your security card, you're prone to brute-forcing. -if somebody steals your ledger, sees your pin but doesn't steal your security card: you're safe. -if somebody steals the paper with the 24 words: they have access to all your funds, without having to brute-force anything. |
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Yes I have your scripts on my website, oke i will look for it
I don't really have loads of time at the moment (so i cannot write the complete script for you at the moment), but if you need help to get started, you can always PM me (in dutch if you want to) |
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IIRC, i've helped you over PM a long time ago to fetch the data from the NLG-BTC api's of bleutrade.com, bittrex.com and litebit.eu. I've searched my PM archive, and here's the code: <?php
$url = 'https://www.litebit.eu/requests/jsonp.php?call=nlg';
$response = file_get_contents($url);
$obj = json_decode($response, true);
echo 'sell : '. $obj['sell'] . '<br>';
?>
<?php
$url = 'https://bleutrade.com/api/v2/public/getticker?market=NLG_BTC';
$response = file_get_contents($url);
$obj = json_decode($response, true);
echo 'ask : '. $obj['result'][0]['Ask'] . '<br>';
?>
<?php
$url = 'https://bittrex.com/api/v1.1/public/getmarketsummary?market=btc-nlg';
$response = file_get_contents($url);
$obj = json_decode($response, true);
echo 'Bid : '. $obj['result'][0]['Bid'] . '<br>';
?>
You'll need to save this data (or any other data you can fetch from an api) in your database instead of showing it on your screen, and use one of the open source tools to make a graph... |
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Actually, i didn't think about this right away, but a decent graphic card might be suitable for altcoin mining. Personally, i don't have a lot of experience in this field, but maybe somebody else can point you in the right direction. Maybe you could rephrase your question and ask if your GPU is suitable for altcoin mining in the altcoin subforum, i'm pretty sure they'll be able to help you over there Mine altcoin with your GPU => deposit on an exchange => trade for BTC => withdraw to your wallet |
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I don't have this problem. I have the HW.1, but they should have the same firmware. Try reinstalling the client or using a wallet like electrum for the time being. For mine, i just exported the xpub, and like NorrisK said, imported it in electrum to create a watch-only wallet...
However, i did this because i like to leave my ledger at home, while i send most payment requests from the office. Now, i can send payment requests from addresses i got from my electrum watch-only wallet while i'm at the office. I never had any problems copy/pasting addresses from their chrome-plugin-wallet tough.
If you'd like, i can try some stuff out this evening, when i'm at home. Maybe it's a good idear to give us your OS, chrome version and wallet version...
OP's asking for help on spending, not on watching is addresses. Just re-read the OP after reading your post, you're right... I overlooked that part, sorry  . OP: if you can't figure it out, i'll see if i can help you when i get back this evening. However, it would still be helpfull if you had your OS, chrome version, wallet version, and maybe the logs? |
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For mine, i just exported the xpub, and like NorrisK said, imported it in electrum to create a watch-only wallet...
However, i did this because i like to leave my ledger at home, while i send most payment requests from the office. Now, i can send payment requests from addresses i got from my electrum watch-only wallet while i'm at the office. I never had any problems copy/pasting addresses from their chrome-plugin-wallet tough.
If you'd like, i can try some stuff out this evening, when i'm at home. Maybe it's a good idear to give us your OS, chrome version and wallet version...
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Forgive my ignorance, but can you mine directly from Bitcoin Core then?
Not anymore. Mining with Bitcoin Core was just removed in 0.13.0 because CPU mining is absolutely pointless. It wastes energy and will destroy your CPU. I know mining is solving the blockchain transaction puzzles.
But since you are storing all the transactions on your PC anyway, doesn't that mean you are storing all the blockchains as well?
I am interested in mining since my PC is already on 24/7, would be nice to see how much btc i can net over a month if any.
Don't do it. It's pointless, it won't help, and you will be mining at a loss. You will also end up shortening the life span of your computer. What if i don't pay for electricity? I have a GTX960 as well. How much roughly do you think it can make running 8 hours a day for a month? I just want to see it work, it would be fun i think, i wouldn't be doing it for actual money, but if i can make $5-$10USD a month, might as well since the computer is idle at night time. You certainly won't make $5-$10 USD/month, but the hardware damage will probably exceed $5/month when you try to mine. https://en.bitcoin.it/wiki/Non-specialized_hardware_comparison doesn't list the GTX960. The GTX295 hashes at 117 Mh/s. https://linustechtips.com/main/topic/268826-is-mining-with-the-gtx-970-at-650-mhs-worth-it/ tells tales of a hashrate of 650 Mh/s. Let's plug these numbers into coinwarz: http://www.coinwarz.com/calculators/bitcoin-mining-calculator/?h=0.65&p=2600.00&pc=0.00&pf=1.00&d=220755908330.37200000&r=12.50000000&er=637.04740000&hc=0.001 dollarcent a month IF you run 24/7, at current difficulty, reward and price... Not counting the power cost, the hardware cost,... I'm pretty sure this 1 cent is already rounded upwards. In reality, you seem to want to mine on workdays during working hours, 20 days/month, 8 hours a day... So divide this 1 cent by 4,6 (the one cent a month is when you would mine nonstop using your GPU). You'll need to mine in a pool for several years in order to reach enough coins to cover the mining fee... I'm pretty sure you'll need to mine forever in order to reach the minimum payout. BTW: mining using your CPU instead of your GPU is even a worse idear. Sorry to sound so harsh, but it's the reality... Nowadays, mining without an ASIC is like flushing your cash down the toilet. |
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Have been using Electrum for almost a year now and haven't had any problems with sending or receiving coins. No issues with using it from me and haven't heard anything out of the ordinary happen to anyone's coins either.
Only thing I would like is not having to pay tx fees but that is normal for a client based bitcoin wallet.
Atleast they allow to pick what you want to set the priority level (economical*very slow*-top priority*fast*) of the coins right before you confirm you want to send them.
open electrum => tools => preferences => set transaction fees manually Once you start to create a transaction, you can chose your own fee, and i'm pretty sure 0 fee is an option (untested)... HOWEVER: use with extreme caution!!! not paying a fee might cause your transaction to be unconfirmed for a very long time (if not forever, or untill the network forgets about it). You do not pay the fee to the electrum developer, the fee is to give the miners an incentive to add your transaction to the block they're mining, cheaping out on the fee (or not paying a fee altogether), takes away their incentive to add your tx to a block, and might cause you a major headache (altough, there's a small chance you might be just fine). |
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It might be a good idear to move this topic to the electrum subforum. This being said, i haven't read any horror stories about vulnerabilities within electrum that caused the user to lose his coins... However, i did read stories about users that didn't write down their seedphrase, or started playing with 2FA with insufficient knowledge... From time to time, electrum does hang or act strange, but a restart or an upgrade usually solves the problem, ThomasV is usually fast and happy to help if something goes wrong (which is also a big plus). I'm a happy user since a long time |
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