This address is part of a wallet that contains allmost 7000 addresses that were funded in the past:
https://www.walletexplorer.com/wallet/00000ff1c2221976/addresses

If you find a valid hit on one of these 6798 addresses using google, you'll know the real owner of said address  

EDIT: it's probably bitfinex's hotwallet, at least, that's what a very quick google search told me (didn't investigate toroughly tough)

Why wouldn't you just use scp to move files between systems instead of having to install a server daemon? Sure, the speed might be a little lower, but i'm pretty sure this time difference would be compensated by not having to configure a web server...

symlink in *nix is called a softlink..
ln -s

as for the sync speed: OP is talking about btcd. In my experience, btcd is a lot slower than bitcoin core when it comes to syncing (i'm currently close to giving up syncing my own btcd node and switching back to bitcoind, since my node has been syncing for 2+ weeks now).
IIRC correctly, it has something to do with the fact that btcd doesn't multithread it's sync process... When i noticed the slow sync speed, i remember i found the rationale behind the slow sync speed somewhere on a github ticket, i'm just to lazy to try to search the ticket again

New feature added in bèta phase:
https://www.mocacinno.com/mining/index2.php

Ever wanted to know wether or not you ROI'd on that old S7 hashing away in your basement? Ever wondered if now was a good time to unplug your S4 and donate it to a school? Use my tool to calculate how much money you made with your hardware

Q&A for the new tool:

Q: why can't i make an estimation for the years 2009-2010
A: I didn't import the data for these years, since the BTC price was allmost 0.

Q: why can i make a simulation that indicates i've mined more than 21.000.000 BTC. Isn't this impossible?
A: if you try to emulate what an Ebit E10 would have generated if you started using it on the first of januari 2011 untill today, you get an estimated number of mined BTC that far exceeds the 21.000.000 BTC that'll ever be mined. This is because in 2011, the diff was very low because the total network's hashrate was probably lower than the hashrate generated by a single E10. Because the E10 wasn't in production in 2011, the historic difficulty didn't rise because in reality, there weren't any E10's running on the network. Since you're emulating very efficient hardware on difficulty data of the early network, results might seem ridiculous. Bottom line: only emulate realistic scenario's

Q: I can't see the table
A: I'm using a html5 function that isn't working on IE9 and below

Q: your numbers don't match other profitability calculators for 100%
A: this is because i use historic information about the fees that were payed to the miners, and i use historic bitcoin price information from a single source, and i add a 1% miner's fee. If you use an estimator that just uses the block reward without including the fees, or uses a different source of bitcoin prices, or adds no (or a different) miner's fee, you'll see a different outcome

Q: your estimator is way off... I've been mining for x years and my profit is waaay higher/lower
A: It's all about odds and averages. It's perfectly possible you were lucky/unlucky and have a different outcome than the one estimated by me... Also, my estimation is based on people that sell their mined coins on the same day they mine them... If you didn't spend outputs you got as a coinbase reward in 2009, you'd be a millionaire, but if you sold them in 2009 you're probably still poor like the rest of us . Last but not least: not all pools pay out the additional fees, some charge withdrawal fees, some use PPLNS others don't,... Your net income will also depend on this

Q: why does the estimation table sometimes start with 0. Didn't i have any income during my first day mining?
A: i only found historic data from blockchain.info. However, their export only has 1 data point every 2 days. This means that my historic cache database doesn't have information for 50% of the historic dates... If you query a timeframe whose very first day isn't included in blockchain.info's historic dump, the estimation will start with an income of 0 for the very first day. Subsequent days are extrapolated, but the very first day isn't.

You are right, i'll add a piece of text at the bottom of the page explaining that eventough CPU/GPU/FPGA's/old ASIC's are worthless when it comes to bitcoin mining, they do have a potential function in the altcoin mining circuit... I decided to focus on bitcoin mining, but there is no harm pointing out that visitors don't have to throw out their old GPU's

PS: if you're assisting new members in learning how to mine, it might be better to point them towards the testnet. From time to time the diff goes to 1 for a little while. I guess a newbie can learn how to mine using his CPU/GPU during these periods... This way he/she gets the full experience, he/she can find not only shares, but he/she can even solve real testnet blocks (just my opinion tough, as long as you're helping out the community, i'm happy)


Thanks for the heads up, you're very welcome  

PS: in case somebody can get his hands on more VERIFIED benchmark results, and/or is willing to help me update/maintain this list, it's not difficult for me to write an admin interface and give one or two TRUSTED community members access to the hardware list. If you are willing to lend a helping hand, either reply in this thread or send me a PM

Damn, should have made this thread self-moderated...

@bigo9x, i have no clue what your remark means. Are you asking a question, are you pointing out a bug,...?

You know those threads where newbies keep trying to convince other newbies that mining bitcoin with their PC's CPU/GPU/cellphone CPU/tablet/pen and paper/... is a good idear because of "reasons".

I was so sick and tired arguing with new people that don't want to take advice from more experienced members that i decided to write a conclusive tool that proves to them that their idear is wrong 
I now made a standalone version, with a caching functionality and filters, and i also added the specs of most ASIC's and non-specialised mining hardware to my database, allowing for a very broad comparison of different brands of ASIC's (and non-ASIC's) at different power prices and pool fees. Everything updated with the latest diff, block reward (including fees) and BTC price once an hour (using blockchain's api).

Without further adue: http://www.mocacinno.com/mining

Bugs, feature requests and additional hardware specs can be added by replying in this thread.

Before unexperienced members start flooding this thread with crappy comments:

YES, you can make a  (neglectible) net profit mining with ANY non-ASIC device IF ALL of the following conditions are met:

• 1) you have free power
• 2) you have free hardware
• 3) you have free time
• 4) you are looking at a very, very, very long timeframe

HOWEVER:

• 1) IMHO, there is no free power... Somebody is paying for it. Either your parents, your landlord, your boss, your governement,... is footing the bill. And a lot of times, they'll pass the cost on to you in one way or another (you'll inherit less money, you'll get fired, you don't get a raise, your taxes go up, your rent goes up, you go to jail,...)
• 2) Even if your hardware is free, most of the times it would be better to sell the hardware directly... You'll get more money from selling the hardware than from mining with it
• 3) If you have free time, you'll probably make more money taking a job and buying BTC with the earnings than you'll make by mining
• 4) The very long timeframe might be close to infinity in case of very slow and power consuming devices

I've never used blockchain.info simply because at the time I was reading about them (many years ago), iirc they did admit to storing your key in an encrypted form (like you already mentioned).

I do not trust any thirth parties... In blockchain.info's case there are several things that can go wrong and which I have no control over (ranging from blatantly lying about the encryption of your keys to running on boxes whose os kernels have not been patched against meltdown attacks).
I'm not accusing them of foul play, I'm just saying that even in blockchain.Info's case you have to trust them on their word and trust their competence.

I'd rather recommend a desktop wallet whose source code has been properly vetted vs trusting the word of a private company. I do realise exploitable bugs have been found in desktop wallets, but at least I would have been able to find them had I invested a lot of my time...
 
Next to this I'm receiving soooo many phishing mails trying to make me log in to "my" blockchain.info wallet and I've seen so many newbies running into problems when they tried to restore wallets or sign messages.... No, i won't recommend any online wallets, not even blockchain.info... But that's just my personal opinion tough, you're entitled to have your own idear about this matter

You are in the bitcoin mining forum, so i'll give a bitcoin mining answer: you cannot mine with a cpu or a gpu anymore. The hashrate is sooooo low compared to the network hashrate, the odds of finding even a single share on a pool are extremely small... The odds of finding a header whose sha256d hash is under the current target using a cpu are much smaller than the odds of winning the lottery... In fact, cpu mining bitcoin is just burning electricity and putting strain on your hardware.

If you have a really good GPU you can try altcoin mining, altough in my opinion, altcoin mining is more of a "hit and miss" situation... Sometimes you mine a coin that turns out to be profitable, sometimes you mine a coin that turns out to be a scam... More information can be found in the altcoin mining subforum.

Your second statement (you have a blockchain wallet for BTC): does this mean you're using an online wallet from blockchain.info? If so, do realise that if you're not the only one in controll of your private keys, you're not the only one in controll of your funds. I'd recommand a desktop wallet on a clean PC if you're just starting out, and an upgrade to a hardware wallet , paper wallet or airgapped pc wallet if you're holding more than a couple hundred bucks worth of BTC.

Your statement about "online mining sites" is correct. 99,9% of those sites are scams, the other 0.1% sells you 100% of their risk for a small part of their profits... If you use them, you're basically taking on all the risks and only get a small portion of the rewards... Doesn't sound so good now, does it

Nicehash is legit, but if you're going to use it to buy hashrate, do realise that if those sellers could make more money by mining themselfs, they would do so... So if you buy hashrate from them, and point this hashrate towards a big pool, you'll probably end up losing part of your investment...

Your question about GPU hashrate can be answered by this tool i wrote a long time ago: https://www.mocacinno.com/nonspecialisedmininghardware.php

---

Now, these were the answers to your questions... Do you want my advice? If so: forget about mining in the beginning. Get yourself a decent wallet (not an online one, especially not an exchange wallet: these are even worse). Buy a small amount of BTC and start reading/learning. You can even try a testnet wallet first, so you can experiment without financial consequences.

IF, in a couple of months, you've gained some basic knowledge, you can start thinking about mining IF you have a very cheap electricity rate AND several thousand USD to buy some decent ASIC's... If you don't have a good electricity rate, or if you don't have some starting capital: forget about bitcoin mining.... You can dip your toe into altcoin mining if you build a GPU rig, but that's a different subforum

Most of the answers in this thread should have been really helpfull for the OP, i didn't see many mistakes being made by other posters. I did, however, wanted to elaborate on this statement.
If, for example, bitcoin forked into replayattackbitcoin (a fork without replay protection) and you have 1 unspent output funding address 1MyoriGinalAddress before the fork, what could happen if you spent this unspent output on the replayattackbitcoin network?
1) You create a transaction using the unspent output to fund 1AddressGeneratedbyAseller
2) you broadcast the transaction on replayattackbitcoin's network
3) the attacker saves this transaction and broadcasts it on bitcoin's network
4) the transaction gets included into a block on both the original and the new network's blockchain

The end result is that address 1AddressGeneratedbyAseller will become funded on BOTH chains. The attacker cannot use your transaction funding 1AddressGeneratedbyAseller to fund a thirth address owned by the attacker.
In other words, the attacker has to convice you to fund his own address on chain A, then replay the transaction on chain B, otherwise he'll gain nothing from the attack (he can still perform the attack to annoy you, but he won't have any financial motivation to do so).

I actually made this diagram a long time ago (copyright: me). It shows a replay attack and a simple way to protect yourself from such an attack.

i'm not saying (and have never said) that banks are not using cryptography... They'd have to be stupid not to... I'm saying that banks are centralised institutions that rely on centralised relational databases. Blockchain technology is the opposite: it's not centralised, it's immutable, it's open. A bank can delete all your records with a single query, they own the data, they're in complete controll... This is completely different with crypto currency: nobody owns the data, it's a decentralised, trustless ledger whose records can not be edited (unless a 51% attack were to happen, but still, after a couple confirmations, your transactions are safe).

What you're saying about banks; that they could save millions by using blockchain technology might be true, but to this date, i have not seen banks in my country that publicly admit they're using blockchain technology in a production environment... So while it's true they could benefit from the technology, i wouldn't say that most banks are already using this technology...

I don't want to start a discussion about wether or not blockchain technology is more advanced than cryptography... I'm just saying that blockchain technology is using cryptographic techniques. This does not make blockchain technology a more advanced form of cryptography... The reason i don't want to start this discussion is that it's a discussion about semantics, and i don't find such discussions interesting

But still, when talking about traditional banking, i read people falling victim to phising attacks, fake microsoft employees, virusses, exploits, false invoices, money muling, vulnerable banking apps,... on a daily basis...


Could you elaborate? AFAIK, traditional banking depends on centralised relational databases and digitised tapes being exchanged between banks... This is not the same as a decentralised, immutable ledger.

The "advanced form" of cryptography is not "block chain". According to wikipedia:
source: https://en.wikipedia.org/wiki/Cryptography

While the defenition of blockchain is:
source: https://en.wikipedia.org/wiki/Blockchain

Blockchain technology uses many cryptographic concepts, but saying that the advanced form of cryptography is blockchain is not correct (imho). It's like saying the advanced form of of an engine is a car.

I'm afraid i have to disagree with you (and therefore agree with the OP). Using any exchange (or online wallet) is a bad idear in my book. Like the old saying goes: "As long as you're not the only one in controll of your private key(s), you're not the only one in controll of your funds".

I'd even go as far as adding all online wallets to the list of wallets that shouldn't be used. Some of them are a bit more secure than exchange wallets, but they're still not as secure as a truely vetted desktop wallet on a clean pc, or a hardware wallet, or a paper wallet, or a wallet on an airgapped system.

About the lenght of the private key (making sure your key can fit under a sticker), have you tought about using a private key in mini private key format?
https://en.bitcoin.it/wiki/Mini_private_key_format

As for your other problem (the durability), i guess it completely depends on your choice of materials. If you use high quality paper, good ink, laminate your wallet and store it in a safe (dry, no light, no changes in humidity) i guess it can last a long, long time...
You can also etch keys in metal, or wood,... I guess you're only limited by your imagination.

there are ways around this...

The only thing you need are the cookies of a logged in session, you'll probably need to refresh this cookie every hour, and you shouldn't make more than 30 requests/minute
Even bypasses cloudflare

That's not necessarily true... You don't need to start a new escrow transaction for everybody playing your game... You just need to make sure that the amount in escrow is equal to or bigger than the sum of the amounts you are holding for your active players.
So, a one-time escrow deal of (for example) $500 should cover all your escrow needs for the forseeable future. This will probably cost you $5-$10, and it should be sufficient as long as you're not holding more than $10 for 50 active players at any given time.
This does require a certain level of financial transparancy, so the players know that their deposit is covered by the total sum escrowed by a trusted party.

I guess that escrowing $500 will probably sustain you for several months and thousands of games without the need to make any additional escrow deal (because by the time you're holding more than $10 for more than 50 players at any given time, you should have built enough trust to continue escrow-less)

I'm defenatly not implying you're going to scam your users (far from it... If your intention would be to scam somebody, you probably wouldn't have come to this forum to ask for advice).
The reason for using a provably fair system, signatures and an escrow is to make sure your initial users will have nothing to fear when they deposit to your addresses. You can give them an assurance than an independant escrow will actually be able to issue a refund in case things go sour. This will make your users less afraid to deposit funds to your game, thus allowing you to build a solid reputation.

As for your last question: i guess this forum is the best place to look for some feedback. In my opinion, it would be wise of you to create a beta version running on the testnet, open an [ANN] thread and give some small bounties to people to try out your beta version, and maybe give some bigger bounty's or prices to testers that find improvements or bugs in your beta version. That way a lot of people will try your game while it's on the testnet, and you'll gain some valuable feedback for a small amount of BTC.

The lightning network was designed for cases like this... hundreds of microtransactions between 2 parties could result in only 2 onchain transactions (one opening and one closing the channel). The transactions are off-chain, instant, and nearly free (if you get your users to open a channel directly to your lightning node, you can even make sure their lightning transactions are completely free).

As for your problem, i don't see a real technical sollution... Whatever you do will always require some level of trust. Either you trust your users ( which is a bad idear imho), or your users trust you. I'd personally prefer the second case: you can build trust over a longer period of time, whilst your user's are unknown, faceless individuals whose accounts can even be sold to scammers.

There is a non-technical sollution tough: make your game provably fair, sign every deposit address and escrow a couple hundred (in fiat equivalent) with a trusted forum escrow.
If you ever scam your users, they should be able to provide screenshots of their bets, the seed, the hashes, the signed messages and turn to the escrow provider...
As soon as you've ran your business and processed several BTC, you can eliminate the escrow and just provide signed messages from the hot wallets proving you have processes a lot of BTC and *should* be trustable.

the address and the txid won't help you...

IF you still have access to the original drive, just copy the wallet.dat from the old drive to the new drive (make a backup copy of both wallet.dat's first) and restart bitcoin knots (potentially with the rescan argument).

IF you erased the hard drive you used to install bitcoin knots the first time, immediately stop using it, and find a suitable recovery software, and hope you're able to recover the wallet.dat file.

That's correct. There is no way to know if somebody own the private key that has to be used to spend an unspent output.

Offcourse, there are a couple addresses known that have been used to "burn" bitcoins, for example: https://blockchain.info/address/1BitcoinEaterAddressDontSendf59kuE

It's not because an unspent output hasn't been spent for years and years that it's automatically "inaccesible". It might also be a cold storage address.