Electrum is trying to send a specific amount of bitcoins (0.002 btc) to a specific address that i didn't choose....
Those 0.002 are charged from trusted coin. You do have 2FA activated in electrum, right? There was a description of this service when creating a new wallet:  You can either pay the fee (for 20 co-signed tx's) or create a new wallet (same seed possible) without 2FA. You can read more about the 2FA of electrum here: http://docs.electrum.org/en/latest/2fa.html |
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I guess you are talking about the desktop version of electrum and not about the mobile one? In that case it doesn't make sense to move the file to a mobile phone to analyze it. You can try to bruteforce your pin/passphrase of your wallet file with btcrecover ( https://github.com/gurnec/btcrecover) if its either 1) an easy passphrase or 2) you remember parts of your phrase/pin In both cases btcrecover should do the trick for you. |
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Sometimes, when I download the lastest version of a wallet (any wallet)
They didn't show my address in receive address.
What do you mean by your address? But with the old version wallet, the address is beeing see (not with the lastest)
Did you try to import a private key / mnemonic seed into a wallet? Or did you generate a new one? Is there any tips to retreive my old address in a new lastest wallet?
I'll try to dump wallet and import but nothing!!
I repeat sometimes with any new wallet, they didn't show my receipt addres!
First, start off with the wallet you are currently using and what you exactly want to accomplish. Do you wan't to export/import your private keys from your old wallet into a new one? |
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If it is a 24 char pass with upper, lowercase and numbers it should not take that long.... You clearly don't know BIP38 encryption, even 6 characters will be very expensive to brute-force! If his password is one 24 char word and he knows part of it im sure that a good python script wont take long to crack it. If 6 characters are hard to bruteforce, you would need to know 18 out of the 24 chars to reach the same 'difficulty'. The bruteforcing isn't really dependend on how good a script is written. Its mostly dependend on the algorithm itself.
Im not saying its impossible to bruteforce this password, but its definetely going to be rough. @OP: Can you limit the possible combinations to check notably? |
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The amount of a fee isn't affected by the price of bitcoin.
Depends on how you measure the fee. With BTC at 10k $ a fee of 0,0001 btc is about 1$. Considering same amount of TX's, etc.. this would correspond to a 10$ fee with BTC at 100k$. The fee - in satoshi - isn't affected by the price of BTC, thats right. But the dollar value of the fee is. Bitcoin transaction fee is not fixed as it is changed platform to platform. Some platform charge high trading fees some charge low...
Transaction fees (Network fee for the miner) is not the same as a withdrawal fee from exchanges/etc... The withdrawal fee covers more than just the simple network fee. Quite a few costs are associated with withdrawals (e.g. transfers from hot-> cold wallet, support costs, security audit costs, ... + network fee) |
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The awnser to this question heavily depends on the definition of 'enough' and the meaning of 'reduced fees'. If segwit, for example, reduces the fees 50%.. is this enough? Or is 1$ per transaction 'reduced enough' ? Depending on how the lightning network will be accepted (or whether there will be different implementation of HTLCs [1] will be superior) and on the estimated user base segwit may or may not be enough to keep the TX costs 'low enough'. If you consider it 'safe' to leave a channel open, and not closing it too often.. the transactions fees will hardly attract attention. [1] https://en.bitcoin.it/wiki/Hashed_Timelock_Contracts |
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Does anyone know how long a ledger nano s last for before it no longer works?
Since the storage of the nano s is a simple flash memory the expected lifespan would be about 10.000 to 100.000 (Write-)cycles. Depending on the usage its definitely enough for 5 to 10 years. The better the conditions are, the longer it will survive (e.g. no extreme temperature change / high moisture). |
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If you’re paranoid about your 24 word seed being compromised, would it be safe to put it on a pin protected iPhone/Android that you never take online?
It doesn't make sense to me to store a 24 word seed on an (always offline) mobile. If your goal is to have a full offline backup, why not store it on paper? Or an USB-stick / SD card ? There is way too much 'technology' in a mobile to be 100% sure its completely offline. Especially for backing up information in form of 24 words. If you want to increase the security of your offline backup, then use a simple storage device and encrypt your seed phrase with a pin/password. Even better would be a (correctly generated) paper wallet or a hardware wallet. Those two would give you the 'highest grade' of security. |
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Hi. I am in a similar situation as Moldy. i have btc in a bip38 paper wallet and i have an idea of the passphrase but can't seem to crack it. i would make it worth anybody's time for sure as there are more than 3 btc to be released. thanks
You can either try it by yourself or make your information available on public to get anyones hands on it. You should make an encrypted private key (with only a fraction of your whole balance / or 0 balance at all) public, since you don't want to get your funds stolen after someone decrypted your private keys. You need to remember (at least) a few properties of your password. For example: - Lenght? Min. max?
- Which chars did you use? / Which chars didn't you use for sure?
- Any patterns you repeatedly use? e.g. '123' at the end?
- Variations of anything you use?
- Upper/lowercase ? Mixed?
- Can you exclude characters at certain positions for sure?
The more you remember and the shorter your password is, the higher are your chances to retreive it. |
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Did you already try to 'crack' it yourself? You can use btcrecover [1] to do it yourself. Additionally, without further information about the password this seems to be a hard (to unpossible) task. Do you have any clue regarding your passwords? - How long was your passwords? min. max. characters?
- Which chars did you use / or didn't use for sure
- Do you use a specific pattern for every password?
- Anything else you remember?
Any of those information would help recovering your password. The best would be to write down anything you know about your password and try to use btcrecover[1] on your own. [1] https://github.com/gurnec/btcrecover |
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I run a full node on my Raspberry Pi at home. I want a desktop wallet that uses this full node. Not interested in using remote-x or xpra or setting up an electrum server.
This mostly depends on the use case. You can either 1) use core on your desktop PC and connect to your node (either exclusively / or additionally). You can use one of the following two commands: to additionally connect to your node, or the following to exclusively connect to your node: This still requires your PC to have the whole blockchain saved. 2) directly connect your raspberry PI with your PC and change the data directory of your PC's wallet to the data dir of the full node on the raspberry pi. This makes it not necessary to have the whole blockchain downloaded on your desktop PC. |
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2018-02-22 01:24:37 IO error: Win32WritableFile.Sync::FlushFileBuffers F:\work\Bitcoin core\blocks\index\001215.ldb: The request failed due to a fatal device hardware error.
..
2018-02-22 01:24:41 IO error: Win32WritableFile.Sync::FlushFileBuffers F:\work\Bitcoin core\blocks\index\000001.dbtmp: The request failed due to a fatal device hardware error.
..
2018-02-22 01:24:42 CDBEnv::EnvShutdown: Error -30974 shutting down database environment: DB_RUNRECOVERY: Fatal error, run database recovery
...
2018-02-22 01:24:48 IO error: Win32WritableFile.Sync::FlushFileBuffers F:\work\Bitcoin core\blocks\index\000001.dbtmp: The request failed due to a fatal device hardware error.
...
2018-02-22 01:24:49 IO error: Win32WritableFile.Sync::FlushFileBuffers F:\work\Bitcoin core\blocks\index\000001.dbtmp: The request failed due to a fatal device hardware error.
It seems like your hard drive is somehow broken and this led to your data getting corrupted. Did you already check whether your HD is working as intended? You could try to read out the S.M.A.R.T values of your HD and see if everything works as it should. [1] My guess would be that your HD got corrupted during v0.14.2 and core wasn't able to read those files after updating to 0.15.1 [1] Tools to read out S.M.A.R.T. values: https://en.wikipedia.org/wiki/Comparison_of_S.M.A.R.T._tools |
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[1]
Yeah, I didn't want to restore my Coinomi wallet to Ledger, but rather "sweep paper wallet" for only one coin.
But I got it, the best way in terms of security is to transfer them. Thanks.
"Sweeping" means to send all funds from one wallet (e.g. paper wallet) to another wallet (the one you are speewing it into). Most wallet softwares let you "sweep" your funds. But what basically happens is they import the private keys, sign and broadcast a transaction with all funds being sent to an address generated by the wallet software itself. [2]
But is leaking public keys a danger to my funds? I mean, by having access to my public keys is anyone able to "touch" my coins or tokens?
No. Just your privacy is 'at risk'. Security-wise everything is fine. |
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Open the Bitcoin folder; there you'll see the wallet.dat file. Look at the details in the wallet.dat file to retrieve your password.
What? No. A password would be completely senseless if you could just right click and "look at the details" to retrieve it. The password is not stored anywhere on your PC. The private keys are encrypted with a (fully random) master key which is encrypted with AES-256-CBC with a key derived from the passphrase using SHA-512 and a dynamic number of rounds (depending on speed of the computer which does the initial encryption). |
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i'm already have HD wallet by default, with Bitcoin Core 0.15 - right?
If you created your wallet in 0.15, yes. If you created your wallet in an old version (< 0.13, i think) and upgraded it, yes. If you created your wallet before 0.13 and didn't upgrade the wallet with the startup command -upgradewallet, then no. Are you sure I dont have to enter password and decrypt wallet to refill my keypool? Because I dont think so. And I dont want to enter password for this wallet on online computer.
You don't have to "refill your keypool". You can simply generate addresses on demand, without having to worry about inconsistency. The first 100 generated addresses on your linux machine will be equivalent to the first 100 generated addresses on your windows machine. The next 1000 (created on linux) will match those 1000 (created on windows), and so on. |
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Im not sure if i understand you right.. But as far as i understand your post.. its basically this: I think you are being scammed.
I have looked on the blockchain & can see the incoming btc.
What do you mean? Do you mean he sent the transaction and you can see it in a block explorer? I would definetely advise to create a new wallet and move your funds to your new wallet as soon as possible!
Reminder: Never give anyone access to your blockchain.info account. Never send anyone your private keys / wallet files. Never send "money first, to receive money back" - Thats a scam. And to be honestly, a very bad one. Everyone who has access to your private keys has full control over your funds. |
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“There was a bug on Bitgrail where if you placed two orders you got double balance added to your account. You could then withdraw while the orders were up and steal the coins. You had negative balance in the end but you could just make a new account.”
What the. Actual. Fuck. That would be bad enough in traditional finance or actually any online application that handles money. But in crypto such a bug becomes fatal. Not just that. Bitgrail Shitgrail had 2 more bugs: 1) You were able to withdraw twice the amount when following this procedure: - Request withdrawals
- Wait for email confirmation; Don't confirm.
- Request a second withdrawal (same amount)
- Wait for email confirmation; Click on the link and confirm
- Success. You just received 2 withdrawals
2) You were able to withdraw an amount you didn't have as balance: - Request a withdrawal
- Realize the check for the maximum amount happens client-side instead of server-side
- Manipulate the javascript (yes, javascript.. WTF)
- Profit. You just withdrew a way bigger amount, leaving your balance on
Bitgrail Shitgrail at a negative amount
Those bugs don't happen by accident. Such bugs appear when the coder has zero (really: ZERO) knowledge. But its not like hes only unable to code properly, no. Francesco - Shitesco - Firano claimed 17 million nano got 'hacked' and 'stolen' from his cold wallet. To sum it up: Shitgrails owner is not just a bad coder, he seems to have zero knowledge on how to perform an exit scam properly. The FBI already has been informed and investigations are starting. He will get what he deserves. |
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Can you please remember, maybe you update your Bitcoin Core and after you got just 1000 keys in keypool
If you create a new ( Hierarchical Deterministic [1]) wallet and send your funds to this new wallet, you won't have to fill any keypool. You will be able to generate an 'infinite' amount of addresses. The addresses will be created in the same order in both of your wallets. You can think of it as a mathemtical equation to derive a private key from the seed (plus a counter). [1] HD wallet: https://en.bitcoin.it/wiki/Deterministic_wallet |
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Uh oh Chinese new year is 1 day away and people are cashing out and bitcoin will be falling again starting today.
The cashout for the chinese (lunar) new year has started 3 weeks ago. They arleady bought their presents and their ticket for travelling. Usally bitcoin will start to pump after lunar. Which is in 2 days (16th february). Additionally its the year of the dog, which stands for a good financial status (and less for healthiness). This could (hopefully) mean there is much more money flowing into bitcoin than we expect. |
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