I would like more information on why my account was hacked and bitcoin stolen. I read there was an issue with blockchain and they fixed it and are refunding those who were stolen. Its been a long time and I haven't heard from anyone. Can you help me?
How much did you lose? post the transaction id if you want further help... we could look at where the bitcoins went. Some exchanges have known addresses, so we could at least know if the coins are sitting on some exchange, but chances are, you lost the money and that's all. I haven't seen blockchain.info claiming they had a security breach that cause funds stolen lately. You have to know if it your computer was hacked (in this case you would not get a refund) or if it was on blockchain.info's fault. In any case, never store coins online. Learn how to use Electrum and store your coins there, in a Linux computer that you don't use everyday ideally. |
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Overall a good prediction. I think after the several hard fork attempts (which were all obvious US government attempts to control the protocol) they have given up and after that they have passed future markets on BTC to try to short it, buy a dip as big as possible, and once they are loaded with BTC, they will pump it to $1million in following 5 years. If they can't control the protocol, they want to at least be a major player in the market, and they can control fiat to shake out weak BTC hands. At the end of the day 21 million coins is all that there will be, but there will be infinite fiat, so they can use the fact that fiat is accepted in exchange of BTC to take an huge position on BTC, then make it the world's store of value and global currency as well.
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I need to use Bitcoin Core because I want to practice with Bitcoin Core's command line because I want to learn how to do rawtransactions and other cvars, so I just can't use any other software, it must be Core.
Are you able to read? Do you know how to use google? Just read my Post: Or you can use the regtest mode which also creates a private blockchain with the same rules as testnet (and block-generating-feature).
Regtest is useless for my goal, it would only be useful if I didn't need 2 laptops, but I want to create a realistic scenario with my 2 laptops, so I can do the entire thing exactly as it would in a real situation, can't do that with regtest mode so I will need to download the testnet blockchain, it's not that big anyway. |
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Hi! I'm a bit confused by all the talk about how bitcoin futures will affect bitcoin price. As far as I understand, a futures contract is a binding agreement between 2 parties where mr A will buy an asset from mr B at a beforehand specified price and time. The asset can be any commodity like oil etc, and are used both by producers as hedge and by speculators. It is often possible to settle the agreement directly in cash, without buying/selling the actual underlying asset. I suspect most speculators prefer this option. So, how will bitcoin futures work? Will they require buying/selling bitcoin itself or will they just be settled in fiat cash? I suspect these futures will primarily be used by speculators who probably will prefer to just settle them in cash. So why would such a contract affect the bitcoin price at all? I'm new so thanks for taking your time and explaing this to me  In theory, futures should be backed by real bitcoin holdings which the issuers of the futures would hold, but im not sure... I think futures is just legal institutional gambling. Wall Street will try to control the price through futures. It depends on how stupid the market is to let themselves get manipulated by the price of something that is not even real Bitcoin. We are dealing with billionaire weasels now, it's a new different level never seen before in Bitcoin. My recommendation: Ignore futures and it's price, and only trade real bitcoins directly, anything that isn't this is on the scammy side. |
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Im trying to do some tests to learn how to use raw transactions and other command lines. Since im scared to do this with real coins, I would like to use the testnet. I've never used it before. It looks like you just have to open the testnet shortcut and it will open. My questions are:
1) Does it keep the data folder separated from the real blockchain I guess? Do I get prompted when I first open it for the first time where to put the testnet blockchain?
2) Is there any way to download this faster from a torrent or something? Since its just testnet coins I don't really care that much about it so I would be willing to download it from somewhere faster that the client then just validate it.
You do not have to use the bitcoin core, which needs to download the blockchain. For example I use Copay (both in android phone and desktop), which supports testnet, and doesn't need to download anything. If you want to manually create your transactions then you can just use https://live.blockcypher.com/btc-testnet/pushtx/ to broadcast them. I need to use Bitcoin Core because I want to practice with Bitcoin Core's command line because I want to learn how to do rawtransactions and other cvars, so I just can't use any other software, it must be Core. Anyone knows how big the testnet blockchain is? I've heard it's like 7 GB which is not that much, maybe I will give it a try with the actual client. |
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Hello Everyone,
I've downloaded & installed BitCoinCore 0.15.1 at my end. I want to make it work for mainnet. As soon as I run the application it shows "testnet" on the application. I've no option other than to stop it. I'm newbie to this. Please suggest how to proceed. Uninstalling testnet db data & installing data for mainnet only. (Didn't get much documentation on this.)
Thanks in Advance!!!
It's weird... are you using windows? In windows you get 2 shortcuts, one says "Bitcoin Core (64-bit) and has an orange icon, this is the one for mainnet. And you get another additional shortcut of green color (which just adds -tesnet on bitcoin-qt.exe) and this open testnet. It is weird that it would be opening testnet by default. Be sure that you are opening bitcoin-qt without -tesnet on it. |
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https://bitcoinmagazine.com/articles/developers-release-lightning-protocol-10-perform-successful-interoperability-tests/Blockchain developers ACINQ, Blockstream and Lightning Labs, are announcing the 1.0 release of the Lightning protocol and the world’s first Lightning test payments on the Bitcoin mainnet across all three implementations. These are considered to be important steps toward the standardization of the Lightning Network’s second-level, off-chain payment layer. The three teams, and others in the Bitcoin community, developed the Lightning specification through an open, collaborative process. Looks like it's happening... but now we will have to wait for proper user friendly implementations. I have seen a lot of cool wallet designs. Normal people isn't going to be using any of the complicated command lines, we need a trusted LN wallet that everyday people can use, and also a way for website developers to implemented LN payments easily with some sort of plugin.
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Im trying to do some tests to learn how to use raw transactions and other command lines. Since im scared to do this with real coins, I would like to use the testnet. I've never used it before. It looks like you just have to open the testnet shortcut and it will open. My questions are:
1) Does it keep the data folder separated from the real blockchain I guess? Do I get prompted when I first open it for the first time where to put the testnet blockchain?
2) Is there any way to download this faster from a torrent or something? Since its just testnet coins I don't really care that much about it so I would be willing to download it from somewhere faster that the client then just validate it.
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because cryptokitties issue,they makes ethereum transaction is not going well,so many pending transactions in ethereum blockchain.
don't worry after this issue finished,price growing up again.
The fact that some smart contract to trade virtual kittens is interrupting someone's else serious finances proves once and for all how incredibly retarded ethereum is, and how bitcoin is the only real virtual money. The only way these "use cases" would be acceptable is through sidechains that don't clutter the main network with such complete nonsense, but then again, Vitalik didn't realize this until it was too late, now he doesn't want to admit his whole scheme is a clusterfuck. |
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Hey guys, I'm new to trading in cryptocurrrency and already facing a massive problem.. I sent 2400 BTCRED from coinexchange to yobit because I could sell them for 5000 sats there, but they never arrived. I checked the address over and over, it's definitely the right one, I also checked with coinexchange and they confirm the transfer is processed. It's been 24 hours now and I have contacted support, no answer, wrote to the yobit account on this forum, no answer.. BTCRED is dropping fast and I already lost half of the worth, as a newbie this is very painful, I lost all the profit I made on other coins  Is there some way to track this transaction in the blockchain? So I can find out anything more about it? Thanks in advance. 2017-12-04 23:44:20 BTCRED 2400.00000000 1.00000000 0xba4eaaf1e6a2c51ee1fee7f53a998eb7d4ebe532 0xba4d706721920b4be72262a4e4ed47433202281fe6c8b2e95882c29f41f273b2 Completed Upon further research this looks like another nonsense BTC fork on the Ethereum blockchain? Anyway, I have never used Ethereum, but I found this there: https://etherscan.io/tx/0xba4d706721920b4be72262a4e4ed47433202281fe6c8b2e95882c29f41f273b2There's a lot of "pending" things on there: Block Height:
(Pending)
Gas Used By Txn:
Pending
Actual Tx Cost/Fee:
Pending
Cumulative Gas Used:
Pending It looks to me that the transaction never happened, similar to an unconfirmed bitcoin transaction. Contact the coinexchange support because I think the coins never left the coinexchange wallet. |
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it is still an issue. Even if you are using a pruned node, the first time you boot it you must sync the entire blockchain, then close your client and start in pruned mode, so at least the first time you start from scratch each time you are going to be sure that you can handle the entire blockchain on a single hard disk.
Really? If the wallet file is not changed, then you don't have to reindex the whole blockchain. The whole resync process is only to get the transactions for addresses that were not previously in the wallet. CMIIW, that's my personal experience anyways. Also if you are using a software that is not infected with NSA malware you are most likely using a rather old linux thinkpad an opteron or anything where you can flash the bios, which means your hardware is going to be pretty slow when validating all these GB of data, so even if you copy the files it is still a really slow process.
If you copy the files, whether its pruned or not, you don't have to verify or resync it all over again. The problem: 1TB SSD are pretty expensive and most people don't have the money to invest on it. If you buy a smaller one, when it gets filled, you have to re-sync from day 1 again since apparently you can't keep growing the blockchain on split drivers which sucks but that's how it is.
I don't get why would anyone want to use an SSD for the Blockchain. It's just a waste of money since you're just synchronizing it once. SSD might be slightly less unreliable than traditional HDD, if there is too much write and read operations. If you have 500 GB for a hard disk and it gets filled, then you have to buy a bigger hard disk and resync from scratch. What's not to understand here? Also to use prune mode, you have to have synced the full blockchain once. SSD's are better than HDD precisely because it takes less damage due the high rate of i/o operations as there is no physical movement. Everytime you load Bitcoin Core, assuming you boot it daily to keep it synced, you have to download the past 24 hours worth of blocks and validate them, this can take a while, it takes like an hour on my old quadcore + HDD. |
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You don't have to resync from scratch when you upgrade your HDD/SDD, just copy the files! The current increase is about 52GB/year (144MB/day), and if SegWit is fully adopted it's going to be soon twice that much. But I bet non-hardcore users will use pruned mode, so space isn't an issue. it is still an issue. Even if you are using a pruned node, the first time you boot it you must sync the entire blockchain, then close your client and start in pruned mode, so at least the first time you start from scratch each time you are going to be sure that you can handle the entire blockchain on a single hard disk. Also if you are using a software that is not infected with NSA malware you are most likely using a rather old linux thinkpad an opteron or anything where you can flash the bios, which means your hardware is going to be pretty slow when validating all these GB of data, so even if you copy the files it is still a really slow process. And do segwit blocks actually make blocks higher? I thought the blocks would still be 1MB, but they can fill up to 4MB worth of transactions. |
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These futures contracts are the same as Gold futures contracts. First, its all paper and settled in dollars not BTC. More importantly, if you look at the Gold Futures market there are more Gold contracts than gold available: 542 contracts to 1 ounce of gold.  The net effect is artificially keeping gold prices suppressed! If they overhaul that system and settle in real gold or mandate 1 contract per available ounce. gold price would skyrocket! They are perpetrating the same scheme with BTC paper futures... the net result will like lower the institutional demand for BTC! Not the big upward pressure on price you would expect.  Here's Why the Gold and Silver Futures Market Is Like a Rigged Casino... https://www.moneymetals.com/news/2016/05/16/silver-gold-futures-market-000868People will not pay attention to prices that are obviously not based on real Bitcoin. Exchanges that remain pure to the real Bitcoin price and don't involve themselves in future will be the market makers, because anyone paying real BTC for the same prices as the manipulated future-market BTC prices is a total retard. If it's not backed up by the underlying asset then the resulting price is never a market maker. Basically it will have no influence on the price. Futures only guide prices when the underlying asset doesn't exist yet (the fork's futures for example). Gold is not BTC. |
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Let's suppose I have a private key and I am making an algorithm that is permanently changing one character from the the private key and introducing it in a wallet. I suppose that there is a chance to get to a private key of a person who is storing ETH there. What is the probability of that?
I think you are just talking about regular bruteforcing, and no, it doesn't really work. The amount of time needed would be beyond your lifetime. This is the same as trying to hack any other coin, but what can you do in ETH is attack smart contracts such as the DAO. All these smart contracts that hold money are disasters waiting to happen, it just takes a really smart attacker to take the profits. This is why BTC is safer than ETH, it is simplier and these things can't ever happen. |
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Thanks a lot guys! I'm going to try that after the blockchain is fully synced on both wallets. Ended up installing Bitcoin unlimited wallet since I was having issues with Bitcoin ABC, it didn't give the option to choose a custom folder for the blockchain.
Bitcoin ABC developers are real jackasses by using the exact same path for the data folder as the Bitcoin Core client. Not sure about how Bitcoin Unlimited works. In any case.. I would use a different computer because I would be paranoid to install that software on the same OS that I have installed Bitcoin Core, at least a different partition. You can use the existing block files of the Core folder into the ABC/Unlimited folder to speed up the process (copy all blocks until August 1 2017), so they are only validated and not downloaded (download starts at August 1 2017+ blocks). It's still pretty slow to validate years of blocks tho, may take a couple of days depending on the computer. Chainstate folder cannot be reused. |
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That's the way it works. It's especially slow on HDDs.
It will go quicker if you put the data files on an SSD, or temporarily use a RAM drive (requires extra software, and don't forget to copy it back to permanent storage).
Do you mean a 1MByte connection, or 1Mbit? A 1Mbit connection might be a bottleneck.
To be safe, you need a good 1TB of space. As of right now, we are looking at a linear increase of 1MB per block, which is pretty viable if you look at this: https://blockchain.info/en/charts/blocks-size?timespan=2yearsOn 2016 January 1 we had 53,7 GB On 2017 January 1 we had 96,3 GB So we are growing about 40 GB per year Currently we are at 144,4 GB at almost 2017 completed.. so we have gone up higher than the last year. I guess it fluctuates a bit when more periods of full blocks in a row happen. But the point is, if the blocksize stays at 1MB (hopefully) 1TB would serve you well for following 5 years at least. The problem: 1TB SSD are pretty expensive and most people don't have the money to invest on it. If you buy a smaller one, when it gets filled, you have to re-sync from day 1 again since apparently you can't keep growing the blockchain on split drivers which sucks but that's how it is. This means that you must try to buy a harddrive as big as possible to delay as much as possible having to re-sync from the begining. 1TB seems like the best number/price ratio now if you can afford it. The 1MB connection is definitely a bottleneck too, you should get a better internet connection. |
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Wait wasn't it possible to do this through the GUI?
I mean, you make the sending transaction through the GUI with your watch-only wallet that has funds, since you are on the online wallet, the automatic-fee calculator on Core works. Then you dump what you did in raw format and pass it on the offline node to actually sign the transaction, then pass this raw signed transaction back into the online node.
I think I read someone mention something like this. And if there isn't a way, there should be a way to do this through the GUI already, it's almost 2018 and this is a pretty basic feature that's missing GUI wise.
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Bitcoin has recently been forked into coins like Bitcoin Cash and also Bitcoin Gold. This added a lot of complexity to a technology that are already been perceived as being too difficult to comprehend for the average Joe on the street.
I get a lot of friends who has bought Bitcoin before these forks, who approach me for help on splitting these coins. They are totally confused with this whole business.
Questions I get is as follows :
~ How do I split these coins?
~ Where do I sell these coins?
~ What exchange support these coins?
~ What wallet can be trusted?
~ How many coins do I own, if I used Coinbase/Xapo etc.
~ I stored my bitcoins on a hardware wallet, but my hardware wallet does not support these coins.
~ Will I lose my bitcoins, if I sweep these forked coins into one of these other wallets?
~ I thought Bitcoin had a limited supply, will these coins increase the coin cap and influence the value of my bitcoins?
~ When will <insert third party service> support these forked coins?
~ What happens if I send forked coins to the wrong wallet address? <Example BTC to Bitcoin Cash>
Fortunately I am available to help with many of these questions, but I feel sorry for the average Joe who invested in Bitcoin and has nobody to answer his/her questions.
Did we alienate the average Joe investor, by adding too much complexity with all of these forks?
If you are too stupid to learn how to access fork coins, most likely you are too stupid to keep your private keys safely and therefore you shouldn't even be investing on bitcoin in the first place, to be honest. Bitcoin is not buying some coins in Coinbase or Xapo with your wage and leaving it there waiting for the next pump to sell them. These are the people that always end up losing their money. If someone can't learn these things for themselves, they are not bright enough to be on bitcoin and get rich with it. Forking the coin was always there for anyone to do. If a bunch of trolls want to create a million versions of bitcoin, it's not my problem, you can ignore them if you don't want to get all that free money. My concern is, what will be the use cases for these bitcoin airdrops in the long run? They wont be affiliated to any working product or service and yet are extremely highly pricedeven now.
The same use cases as altcoins: selling it for more BTC. |
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https://www.youtube.com/watch?v=CdtXu2CmEiIThis is pretty huge news. And yes, this is is not a fake, this is the real footage: https://www.youtube.com/watch?v=EUNLSBtdFZYIt's in spanish, unfortunately there are no subtitles. Someone could add them? Im sure a video with subtitles would get a lot of views in the coming hours. Apparently, it the cryptocurrency will be backed by their own petrol reserves, thus ditching the "petrodollar" to have their own dollar backed cryptocurrency. Fascinating times to live in. I wonder how this would develop. If someone has more details post below, including a translated video. Even were the Petro price ZERO, I would be inclined to short it. Anyone believing a word that Ratbag Maduro says obviously knows nothing of him and Venezuela’s current plight, brought on by thieves Chavez and Maduro. “Secured” by Venezuela’s oil, LOL.... Don't get me wrong, I know it will most likely be a trainwreck, since the management skills of the Venezuelan government aren't what you would call too bright. But it's still an interesting to see happening, you are going to see this talked about pretty much worldwide now, and it will put the topic of cryptocurrencies into the mainstream media, and this is always good, even if the news aren't positive or directly have to do with bitcoin. Case in point, I discovered bitcoin because back then I saw it on the news, they were saying it was used by terrorists, I did some research on the internet and found this forum and I realized how mainstream media was clueless. If these news can help just 1 person to find bitcoin and do his own research, then it's a positive. |
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https://www.youtube.com/watch?v=CdtXu2CmEiIThis is pretty huge news. And yes, this is is not a fake, this is the real footage: https://www.youtube.com/watch?v=EUNLSBtdFZYIt's in spanish, unfortunately there are no subtitles. Someone could add them? Im sure a video with subtitles would get a lot of views in the coming hours. Apparently, it the cryptocurrency will be backed by their own petrol reserves, thus ditching the "petrodollar" to have their own dollar backed cryptocurrency. Fascinating times to live in. I wonder how this would develop. If someone has more details post below, including a translated video.
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