Sender says he sent over 500$. I got around 50$. Blockchain writes I received around 50$. Sender claims he sent 500$ and no money came back from this transaction. So now I am stuck in nowhere  What should I do, how i should react and which actions should I take? Let's take a step back. Can you tell me which wallet you're using, wether or not you see transaction 2508f218db9663057bc863f6d986eb84fe8a96f31c61e681847c327dcfce503a in your wallet, and which balance (in BTC) was added to your wallet after you received transaction 2508f218db9663057bc863f6d986eb84fe8a96f31c61e681847c327dcfce503a. If you only received 0.01771605 BTC as unspent output from this transaction, the sender has either messed up or intentionally scammed you. Do not look at blockchain.info's block explorer. It does not matter what they say happened. They are just a visualisation tool, nothing more nothing less. When they have a bug or mess up completely, it has zero impact on your wallet. Also, try to give number in BTC instead of USD. The BTC<->USD exchange rate changes all the time. When you say you received $50 in BTC, it's a completely different value today as it will be in 2 weeks. |
|
|
|
Sorry I am not so smart at Bitcoins and I did not get logic. Someone has my wallet number. They sent to taht wallet 500USD. Blockchani devided this transaction into two parts. One arrived another in no idea where Blockchain shows that I received one part of 45USD and I should be happy ? My main questions would be the second part of payment should arrive shortly or it also a big question ? No problem, you're just learning... But no, there's still something wrong with your logic. Blockchain.info = just a company that analyses bitcoin's blockchain. When they mess up, it has no implication for you. They're not the ones sending BTC, they're not the ones dividing transactions, they're just a way of visualising the bitcoin network (the blockchain). The network itself will exist and work properly without blockchain.info. I'm only guessing here, but because you said you were going to receive $500, i'm guessing address 1AWgAHXjX7fVWhsYZegMNCG3MBwzDXNMQZ belongs to your wallet. The wallet containing this address received an input of 0.18114157 BTC ($461 at the time of writing). This unspent output can be used as an input by your wallet, hence you are payed. The fact that you expected $500, but only received $461 is something you have to take up with the sender. If address 1AWgAHXjX7fVWhsYZegMNCG3MBwzDXNMQZ does not belong to your wallet, you might be looking at the wrong transaction, or the sender might have decided to pay you in little tranches. Once again, you'll have to contact the sender to clear this out. |
|
|
|
The easy, new user friendly explanation is: When you create a transaction, you use an input and you create outputs. It's impossible to use part of an input. So in this case, one input of 0.199 BTC was used, two outputs (one of 0.01771605 BTC and one of 0.18114157 BTC) were generated. Usually, a transaction with two outputs means that the person sending BTC only needed part of the input, so one of the outputs goes to the receiver, the other one goes to a change address generated by the sender's wallet. It is impossible for blockchain.info to know wether this is true at all, and if it's true, it's impossible to know which output went to the receiver and which output went to the change address.... So what do they do: they guess  In your case, they guessed wrong... They guessed the big output goes to the sender's change address, and the small one goes to the receiver. Blockchain.info is just a private company... They are not the owner of bitcoin, nor the blockchain technology. The fact they mis-guessed has no impact whatsoever. |
|
|
|
So I'm sure I understand, with my current Electrum wallet I should disable change addresses if I want to make sure my single backup will always restore everything?
No You imported your private keys, you don't have a HD wallet, no new private keys will be made by your wallet, so if your wallet picks a change address, it'll be an address that comes from an imported key. You can make a backup every time you import new private keys, that should do it. Actually, i'm not even sure that electrum will even use change addresses on a non-HD wallet. |
|
|
|
Thank you.
I understand that I can import the private key in an (offline) tool on an airgapped computer.
However, what is unclear to me is how to generate the signed message on the airgapped computer, but submit it on an online computer.
For that, I would need to be able to export the message/signed message on a USB key for example.
Is this possible using existing tools?
I actually wrote an article on the topic with a step by step tutorial a while ago: http://www.mocacinno.com/blog/how-to-sign-a-message-with-a-bip38-encrypted-paper-wallet/ |
|
|
|
quote from their shopping cart: I understand that due to a very high level of demand, my order will not be shipped before: September 4, 2017
I assume this was exactly the problem the OP was facing... @OP: most hardware wallets producers still seem to have some stock, but ledger does indeed seem to have run out... I tried several retailers from https://www.ledgerwallet.com/retailers, but it seems none have their wallet available. |
|
|
|
Download electrum client and go import your private keys there the one on the privatekey.txt which begins '5', 'K' or 'L' and you can see those bitcoin once imported. Just go on electrum File/Restore/Standard/Already have a private keys/then paste the one on your privatekeys.txt
If you do this, you have to realise you're not the only one in posession of this private key. If the ATM company gets hacked, or if an employee steals the private key database, they can steal everything! If you sweep the private key into your HD wallet, you generate an on-chain transaction, the output of which can only be spent by you... |
|
|
|
Hello, I bought Bitcoin at a local ATM and got them sent via mail. Now I have Electrum fully set up and would like to get the bought amount of Bitcoin from this mail into my wallet. The problem is, that I am unsure how to do it   . The mail contained three different data, a privatekey.txt, a adress.txt and a privatekey_multibit.key data. I know that this is now a pretty newbie-question, but I just want to avoid any difficulties: As far as I have read it, it's just done by clicking Wallet -> Private keys -> Sweep -> and then entering the private key but what do I write into the "adress" field? My "receiving adress" in Electrum or the adress that they sent me via mail? (Why did they even send me a textfile with an adress ) I don't know the specifics of this ATM, but if you have a private key in WIF format, you should just go to private keys => sweep. The paste the private key in the big form. The address should be pre-filled, and should be the next unused address from your electrum wallet Next newbie question, but what is the WIF format? I tried to google it, but didn't really understand it respectiveley I am unsure. The key has 52 digits and starts with an L, if that might help you. Your private key might be shown in different formats. A private key in one format can usually be converted in a different format. Not all wallets support all import formats, so if you try to import a private key into a wallet, and it doesn't work, it might be due to the fact that this particular wallet doesn't accept this particular format. As a newbie, you can download the sourcecode of https://www.bitaddress.org/ and run it on an offline machine, the last tab (wallet details) can be used to convert private key formats In your case, 52 digits, starting with L => probably a WIF compressed key... As a matter of fact, i think electrum only allows WIF compressed keys, not WIF keys (it has been a while since i last swept a wallet). |
|
|
|
Hello, I bought Bitcoin at a local ATM and got them sent via mail. Now I have Electrum fully set up and would like to get the bought amount of Bitcoin from this mail into my wallet. The problem is, that I am unsure how to do it . The mail contained three different data, a privatekey.txt, a adress.txt and a privatekey_multibit.key data. I know that this is now a pretty newbie-question, but I just want to avoid any difficulties: As far as I have read it, it's just done by clicking Wallet -> Private keys -> Sweep -> and then entering the private key but what do I write into the "adress" field? My "receiving adress" in Electrum or the adress that they sent me via mail? (Why did they even send me a textfile with an adress ) I don't know the specifics of this ATM, but if you have a private key in WIF format, you should just go to private keys => sweep. The paste the private key in the big form. The address should be pre-filled, and should be the next unused address from your electrum wallet |
|
|
|
Did you check transaction fees? Your transaction fee can be set high, which can be the cause of your loss. Go to the Tools/Preferences and check your transaction fee per kigabyte. I hope it is not the case.
nothing.. and this was sent via a usb drive on a different laptop. another culprit maybe is that when everything failed me in terms of restoring my corrupted wallet on armory a friend referred me to another friend who does legit IT work for different business near me.. he did use a thumb drive full of recovery tools to recover my corrupted armory wallet but he had no access to my electrum wallet which the rootkey/private keys on only on the tails usb drive.. he said he would run the recovery tools on RAM while I go to work to see if he can spot the wallet and either still this was 20 minute (even more AFTER I sent the transaction to the dnm wallet). furthermore it was exactly x10 in scale it was around a .05 transaction while i had .69 in my wallet I'm sorry, but you've completely lost me here... I respect your right for privacy, and not wanting to share exact amounts nor transaction id's. As a matter of fact, since you're using dnm's, I think you're doing the right thing, i wouldn't share any address, amount or txid either. But since i'm lacking so much info, i don't think i'll be able to help you figure out what went wrong. At the moment, you have told us => about following wallets: paxum, electrum, a darknet wallet and armory (no versions) about following OS's: tails and your local mistery os about following hardware problems: a corrupted armory wallet about following transactions: from paxum to ?, from electrum to ? If you want help, i'd suggest making a chronological list of everything that happened. Replace the real addresses with [Address_1], [Address_depositDNM], [Address_paxum],... and round amounts down to 3 or 4 numbers after the comma. Don't add dates, but make sure the chronology is correct, and at least give an approximate version or brand (for example electrum 2.8.x, windows X,...). |
|
|
|
Thank you for this.
In general: Am I right that the nature of sending bitcoins is something like a stub of a balance. Either my sent bitcoins arrive at the new adress within 2-3 hours or the never will arrive at this adress.
You're actually asking questions about the technical part of bitcoin. <simplified technical explanation>Bitcoin is a decentral ledger containing all confirmed transactions ever made. Each transaction is basically a bunch of scripts. On one side of the transaction, you have the signed scripts used as an input of the transaction. The input scripts are signed with the private key belonging to the public key, belonging to the address that was used to send BTC to (to keep it simple.. In reality i'm skipping a couple of things). On the other side of the transaction, you have scripts stipulating who can spend the output of the transaction. You basically say: the person who can provide a valid signature that can be verified using the public key from witch address [address] was derived can use this output as an input to create a new transaction. After you generate this transaction, you broadcast it to the network. If the transaction is valid (the signatures are ok, the inputs are not yet used in a different transaction,...) it is accepted in the mempool of the nodes you broadcasted the transaction to. These nodes will broadcast your transaction to the nodes they are connected to, and so on, untill the full network knows about your unconfirmed transaction. </simplified technical explanation>As long as your transaction remains in the mempool of a single mining node, it has a chance of being added to the block that particular miner is currently solving. If the miner finds a block below the target diff, and he's able to push the block to the network fast enough (so it becomes part of the main chain) your transaction is confirmed. There is no 2-hour limit. As long as your transaction is floating around in mempools, it has a chance of being confirmed... |
|
|
|
Halo guys, I have found the advice in this forum very useful in every problem I encountered with my Antminers. Now I'm looking to buy a bigger rig or cabinet, something along the lines of 50-150 Th of mining power. I was wondering if you are aware of any credible manufacturers that do make such machines, either custom made or specific product lines. I really appreciate your insinght!  15 Ph/s, they use this chip: http://bitfury.com/products#16nm-asic 0.1 J/Gh If 15 Ph/s is to much, i guess you're stuck with bitmain's S9 |
|
|
|
is it worth to think about mining here:
altcoins are also fine
in case of a power flatrate,
no costs here at all
several computer available,
but not made for this. just easy systems for working, bad gpu
but theoretically they coul mine all night and weekends
e.g. one of it is
Hewlett Packard Elite 8200 USDT CMI Intel 2100 Core i3 2x3100 MHz, Intel HD Graphics 2000 Shared Memory, 4096 MB DDR3, 250 GB
best from Berlin
I don't think there is anything you can do with these machines... Mining Bitcoin on such a laptop will result in less than a dollar a year in BTC, while putting serious stress on your device, shortening it's lifetime. Mining altcoins might be possible if you manage to find a profitable cpu-only altcoin. Mining with an onboard intel graphics card is allmost impossible. All in all, i don't think it'll ever be worth your time, even if you find a cpu minable coin. |
|
|
|
Thank you for the link. I will go into that book.
Thank you for your kind help.
No prob. BTW, i just realised i forgot to tell you about 2 sollutions for low fees that ARE implemented in electrum 1) if you are the receiver OR if you sent change to your change address, and the transaction becomes stuck => right click => child pays for parent (cpfp) (i don't have a stuck transaction right now, so i can't verify the exact wording). 2) if you send transactions, make sure they're always marked as replaceable... You can even go to your preferences and make sure every transaction you create is opt-in RBF (replaceable). If an opt-in RBF transaction gets stuck, electrum will provide a nice wizard to create a new transaction using the same inputs. In theory, this is double spending the inputs, but since your transaction was opt-in RBF, it's much cleaner, and the double spending transaction will (hopefully) have a much lower rejection rate compared to a "real" double spending transaction. |
|
|
|
I would recommend to always add at least 15 satoshi's per byte, since there are a couple of tricks you can use to accelerate a transaction if it has at least 10 satoshi's per byte.
Are this tricks implemented in Electrum? If yes how can I apply them? No, it's not implemented in electrum https://www.viabtc.com/tools/txaccelerator/Read their service agreement and TA before panicking, they have a set of rules about when and how many transactions they accept! |
|
|
|
no other transactions, just this one and it was right after i sent the transaction from my tails usb to the dnm
so if you look at your history, you have one "incoming" transaction and one "outgoing" transaction... The incoming is 10 times bigger than the outgoing, and still your wallet is empty. 2 things could have happened: 1) electrum always uses the full unspent output as an input. When you want to deposit less than the input, two outputs are created: one output to the deposit address, one output to a change address. It's possible you're connected to a lagging node, and you don't see this change yet. Try to change the node you're connected to and see if the change appears in your wallet 2) if you only have one incoming and one outgoing transaction, try to look them up on blockchain.info. Even change the denomination from BTC to USD, just to be sure, and make 100% sure the input is 10 times bigger than the output... I still think about the base unit... there is no way, i even asked the dnm wallet support team about it and they said the receiving address matches none of their generated addresses for my wallet. It also doesn't make sense that my armory wallets were deleted a day before as well as soon as i bought and withdrew from paxful.. could maybe someone on paxful have done it? Although I have a copy of the wallet on my computer/desktop I used the usb on my laptop to boot up tails wallet.. sounds like someone got my IP address?
Well, to tell you the truth, the fact that the inputs and outputs from your electrum wallet don't match is a different problem than the fact that the dnm didn't recognize the deposit addresses. Inputs and outputs have to match... The sum of the incoming transactions - (sum of outgoing transactions + fee) = balance... If there is a transaction to an address you don't recognize, it's a different problem... You are right, it might be a virus, altough tails is a really secure OS, so it looks strange to me. Did you install a full armory wallet on tails? Are you sure it was saved in the correct place, so it wasn't erased when you rebooted? Hundreds of people have my ip, that doesn't mean they can hack me... Very doubtfull somebody at paxful was able to hack you, unless he/she convinced you to install infected malware on your pc that caused all this? |
|
|
|
You really should calculate the fee you want to add manually by looking up how long you're prepared to wait (on average) by visiting a site like https://bitcoinfees.21.co/. At the moment it is 1-30 Satoshi/Byte for a 4-28 block delay. So when I have a transaction which is 226 bytes and I chose 1 Satoshi x 226 = 226 Satoshi, this is a price which will not run into any problem at the moment? Theoretically, yes, 1 sat/byte *should* be sufficient... However, if somebody decides to dump a couple thousand transactions with a higher fee into the network, you would be screwed... Also, there are nodes out there that reject transactions that don't have a minimum fee. I'm pretty sure a 226 satoshi fee transaction wouldn't propagate trough the full network. It's all odds and averages... If everything would remain status quo, you'd have a 95% chance of getting into the next 28 blocks (so ~360 minutes), but the longer you're willing to wait, the bigger the odds that the status-quo will be disturbed, and the average fee goes up before your transaction ends up in a block. I would recommend to always add at least 15 satoshi's per byte, since there are a couple of tricks you can use to accelerate a transaction if it has at least 10 satoshi's per byte. |
|
|
|
well i don't want to say anything that would be too implicit but it was into a trusted darkmarket wallet, but it was only for about 0.06, instead my entire electrum wallet gets deposited which held about .6... this is also using tails using a tor proxxy connection.
Also this happened after i coincidentally deposited a good about of btc from my paxful account into several software/offline wallets
Still confused about the problem, but i'm guessing here: You were depositing funds from your electrum wallet to a darknet wallet, and you're confused because you only deposited 0.06 instead of 0.6. My first guess would be that the base unit in electrum was set to something else instead of BTC... In this case your wallet wouldn't have contained 0.6 but 0.06.... you just tought your wallet contained 0.6 btc because the base unit wasn't correct. This is only my first guess tough. Can you see other transactions in your electrum history, does your electrum wallet still have any balance left? no balance, these are rough estimates. I deposited around .067 or something, my full funds with was around .69 and were deposited 20 min after my deposit into a darkweb wallet So, to sum it up - you had an electrum wallet, you're sure the sum of the unspent outputs (the wallet balance) was 0.69 BTC- you deposited 0.067 BTC to a webwallet - now, it looks like your electrum wallet is empty, while it should have +0.6 BTC left My idear still remains that you actually only had 0.069 BTC, but had a different base unit so it looked as if you had 0.69 BTC. But just in case: - did you try to restart electrum? - did you try to switch servers (green button in the right bottom corner)? - did you see any other "outgoing" transactions in your history tab? |
|
|
|
Thank you.
Can it be a good idea, just to chose the half fees which Electrum suggests in the 25 block mode?
Or can this already lead to insufficient network propagation, unconfirmed transactions getting dropped from the mempool,... ? (As you wrote)
Can Btc's be lost for ever, when I chose a fee that is too little? So is this a risk?
No, i don't think it's a good idear to just halve the fee suggested by electrum... You really should calculate the fee you want to add manually by looking up how long you're prepared to wait (on average) by visiting a site like https://bitcoinfees.21.co/. BTC's can't be lost forever. A transaction gets generated and broadcasted. When it's received by the nodes, they put the data into their mempool. This mempool is full of unconfirmed transactions using outputs that are available in their UTXO set (the database with unspent outputs that can be used to create a transaction). After ~3 days, most nodes kick the unconfirmed transactions from their mempool. So, in theory, you can re-use the unspent output to create a new transaction after 4 or 5 days. This way, your new transaction will use the same input as your previous transaction, so you're actually creating a double spent. This double spending transaction will be rejected by the nodes that still have the previous transaction in their mempool (since your new transaction uses the same input), but it will be accepted by the ones that already dropped the previous transaction. So, in the end, the double spending transaction will have less network propagation, but usually they propage sufficiently to reach the mempool of at least some mining nodes... |
|
|
|
|
Show Posts
