I've been using an online wallet and I don't have a problem.
These kinds of sites have their own security, you can always connect your email, some have their 2FA, some even require a phone number and I am wondering how can someone access your wallet without you being notified of that. Two points to consider, it is either your fault or the sites fault but I don't think the site will just let someone use your balance without logging to your account.
Sorry, but this logic is flawed... It's not because you didn't have a problem with online wallets (yet) that they're safe to use. It's perfectly possible for a hacker to get his/her hands on the xprv, the seed phrase or the derived private keys (sometimes even without using the gui), in this case no email security, sms, 2fa, biometric security will help you... As soon as a hacker can derive private keys belonging to addresses that "belong" (for a lack of better terminology... When using online wallets, your funds belong to the wallet company) to you and were funded, he'll be able to rob you (even if the online wallet goes down). Bottom line: "if you're not (the only one) in controll of your private keys, you're not (the only one) in controll of your funds", this is true no matter which company, which 2FA measures, which guarantees,... |
|
|
|
|
I really, really, really don't like any online wallet, exchange wallet, casino wallet,... Basically any wallet that doesn't make sure you're the only one in controll over your private keys, is open source and has a sufficient recovery scenario in case they ever dissapear is a big no-go for me...
So, in this case, i'm defenately NOT defending blockchain.info/com. However, i do urge you to see things from their perspective: how many emails do you think they get on a daily basis about people that have been hacked and try to blame them for their loss? I'm pretty sure 99,9% of those cases actually involve a user installing malware, falling for a phising attack or exposing their seed/private key/blockchain credentials. If a helpdesk employee gets 1000 complaints, and 999 of them are a PICNIC (problem in chair, not in computer) problem, it's pretty normal that he misses the 1 actual complaint.
That being said, blockchain has been around for a long time, never having met you, i'd also jump to the conclusion that the odds of you running a vulnerable system, having a malicious plugin, running a virus, having your credentials or seed phrase stolen somehow are larger than the odds of a vulnerability in blockchain's system. Mind you, i'm talking about odds, not certainty's... Like i said, i have never met you, i have no proof, i haven't seen anything about you => It's just statistically speaking from my rather lengthy experience in this community, i'd say the odds of the problem being on your side are bigger than the odds of the problem being on their side...
I try not to victim blame... It doesn't really matter if it was blockchain, a virus, a plugin, an OS vulnerabilitly... It was awefull for you to lose your funds, and it's defenately somebody else's fault (i'm not being sarcastic here!).
Anyways, it was a rather expensive lessen for you, i'd recommand to switch to a more secure wallet... Pop $100 and buy a hardware wallet. If not, take an old pc, remove the network card and install a cold (air gapped) wallet. Or learn about paper wallets (do be carefull, you need to take caution and follow the proper procedure to create one of those)
|
|
|
|
I'm not going to go into detail about the scam accusation originally posted, it seems many other members have already gone into grave detail... I don't know the site in question, nor do i know wether or not it's a scam... However, i noticed the person who was the subject of the scam accusation has made dead threats against a person who he identified with both first and last name, aswell as detailing how he would kill said person... Eventough it seems he has now deleted said post? EDIT: found the original in the archived thread hereIn my country this is completely illegal and you can actually be sent to jail, even for posting things like this on a public forum. Is there anybody from Hungary who can verify if this is the case for hungarians aswell? Or is this forum under US jurisdiction, in this case the subject of the accusation might fall under us law (i'm pretty sure making death treats against somebody is illegal in the US aswell). |
|
|
|
I've never seen this error message... Some things do come to mind: - Did you setup 2fa? If you did, you should have been shown a popup telling you that 2fa is provided by a thirth party and it is a PAYING option... I myself have never used 2fa within electrum, so i have no idear whitch error message is shown if you don't have enough funds to pay the 2fa fee
- Are you sure you downloaded electrum from the official site?
- Did you check electrum's signature?
- Are you running the latest version?
- Are you connected to a node (green button in the right bottom corner)
- Are you sure the transaction funding your wallet is confirmed?
- Are you sure the problem is spending from electrum? It's not the person that sold you the btc that is telling you he cannot fund your address (for example due to scammy behaviour on their side)
|
|
|
|
Here you go... This should work (as long as you have a linux box with all dependencies installed). It's cd ~
git clone https://github.com/bitcoin/bitcoin/
cd ~/bitcoin/src/wallet/
sed -i 's/static const CAmount DEFAULT_TRANSACTION_MINFEE = 1000;/static const CAmount DEFAULT_TRANSACTION_MINFEE = 0;/g' wallet.h
sed -i 's/static const CAmount WALLET_INCREMENTAL_RELAY_FEE = 5000;/static const CAmount WALLET_INCREMENTAL_RELAY_FEE = 0;/g' wallet.h
cd ~/bitcoin
./autogen.sh
./configure
make
cd ~/bitcoin/src
./bitcoind -daemon -mintxfee=0
But even if you edit the sourcecode and run the modified version, you probably won't receive any 0 fee transactions, since all other nodes you are connected to will reject said transactions, hence they won't broadcast them to you... This will only work if you're connected to other old or patched nodes that accept and relay 0 fee transactions, or if you use your node to broadcast your own 0 fee transaction... In the latter case any other node you relay the 0 fee transaction to will probably reject it anyways, and no miner will probably touch the 0 fee transaction. It's not because it's technically possible that it's a wise idear to do this  |
|
|
|
Will give electrum a try may be latter.
Before that,
How to generate receive address in bitcoin core without use of "Request Payment".
The bitcoin core is not synchronized at all.
In QT (gui) you can always open the console (help -> debug window -> console) and enter "getnewaddress" If you run bitcoind => ./bitcoin-cli getnewaddress In core, it might also be interesting to make sure your full wallet is backupped properly... If it's a HD wallet only 1 backup is necessary, if it's non HD you should shedule regular backups... If you decide to encrypt a non-encrypted wallet, you'll also need to create a new backupset. |
|
|
|
Basically, you have an online, watch-only wallet. This wallet does not contain your private key(s) or xpriv, but only your addresses or xpub (or ypub). The watch-only wallet is online, thus it can scan the new blocks for unspent outputs funding addresses that can be derived from your xpub. The online wallet can be used to generate new transactions spending these unspent outputs, but since the watch-only wallet does not contain your private key, it cannot be used to sign these transactions. That's why you also need an offline (air gapped) machine. This offline wallet does contain your private keys (or xpriv/ypriv). You need to generate your unsigned transaction with the online wallet, transfer it to the offline wallet for signing, and then back to the online wallet for broadcasting. The offline wallet does not need to be sync'ed, it's only used for signing premade transactions. I've tried this setup with core and electrum in the past. Electrum has a how-to on it's official site: http://docs.electrum.org/en/latest/coldstorage.htmlIf you have any questions, don't hesistate to ask them |
|
|
|
I agree 20 quad core PC's? On NiceHash that has the potential to earn you $400 to $600 per week, depending on Bitcoin prices at the time. Calculation based on a $10,000 BTC price.
Get those bitches mining!!!
I disagree... Proof: 1 i7 hashes at 67 Mh/s (source: https://en.bitcoin.it/wiki/Non-specialized_hardware_comparison#Intel) 20 i7's = 20 x 67 Mh/s = 1340 Mh/s = 1.34 Gh/s = 1.340.000.000 h/s Average dayly income= (((((Hashrate (hashes/sec) * average block reward * 600 * 65535) / 2^48) / Difficulty) * 6 * 24) In your case (((((1340000000*12.5*600*65535)/2^48/ 10183488432889) * 6 * 24) = 0.000000033 (3.3 satoshi's per day => 0.0003 dollar per day => you'd have to mine for 9 years to make $1... Given you ignore the block reward, diff increase or price decrease ) How on earth did you calculate the OP would ever make $400 to $600? |
|
|
|
|
I feel sorry for you, however, you do realise that, when banned, you're only allowed to make 1 thread discussing your ban. As soon as you post outside this 1 thread (or make a second thread), you're evading your ban.
Offcourse, this is a grey area, since both threads are created for the sole purpose of appealing your ban... However, strictly speaking, at this moment you're breaking the rules... Wouldn't it be better to close this thread and bump your original appeal?
|
|
|
|
IF you have a new mac, and downloaded electrum again, you either had to move your wallet files, or restore your wallet from the seed phrase. If you just downloaded electrum on a new system and ran electrum for the first time, electrum will probably have generated a brand new wallet (just an educated guess). - Just go to View => Show addresses
- A new Addresses-tab should appear, open it...
- right click the first address => copy address (or go straight to "view on block explorer", the downside to this method is that you'll be more or less bound to the block explorer that's defined in your general preferences)
- If you copied the address instead of directly going to "view on block explorer" open your web browser, either search for "bitcoin block explorer", or just surf to blockchain.info or blockexplorer.com, paste the copied address and search
- repeat for the next couple of addresses
- maybe try a different online bockexplorer just to be sure
If no block explorer finds any history for the first couple of addresses, it's RELATIVELY safe to assume you just created an empty wallet... |
|
|
|
|
I've created a POC mixer for a client a long time ago... If memory serves me correctly, i billed about ~3 weeks for the POC version. These 3 weeks included designing a multi-server setup, installing the servers, configuring both frontend, database server, backend and hot wallet, writing the actual frontend (including a basic design), database schema and mixing script and testing on the testnet. It was for a bitmixer-type mixing service, not a service like chipmixer (which uses a completely different mixing technique).
In the end, the client wasn't interested in moving foreward, since the tests on the testnet indicated he'd need to have a buffer of at least ~25 BTC to start his service, and he was unwilling to invest this amount of coins. Also, the multi-server setup wasn't hardened, the frontend design was very basic and no thirth party dev had looked over the code to vet it, so moving from POC to production would have costed a couple weeks extra.
|
|
|
|
|
no, but depending on your client you *can* freeze or lock the unspent outputs funding your address with tiny unspent inputs.
In electrum, make sure you activate the "coins" tab, right click on the unspent output you want to lock, and choose "freeze"
In bitcoin core run as a daemon (non-qt gui, but using bitcoin-cli), you can use lockunspent. I don't know if the QT gui also has a similar function.
|
|
|
|
You could always use the console... You'll need paytomany ./electrum help paytomany
usage: electrum paytomany [-h] [-v VERBOSITY]
[-V VERBOSITY_SHORTCUTS]
[-D ELECTRUM_PATH] [-P] [-w WALLET_PATH]
[--testnet] [--regtest] [--simnet]
[-f FEE] [-F FROM_ADDR] [-c CHANGE_ADDR]
[--nocheck] [-u] [--rbf RBF] [-W PASSWORD]
[--locktime LOCKTIME]
outputs
Create a multi-output transaction.
positional arguments:
outputs list of ["address", amount]
optional arguments:
-h, --help show this help message and exit
-f FEE, --fee FEE Transaction fee (in BTC)
-F FROM_ADDR, --from_addr FROM_ADDR
Source address (must be a wallet address; use sweep to
spend from non-wallet address).
-c CHANGE_ADDR, --change_addr CHANGE_ADDR
Change address. Default is a spare address, or the
source address if it's not in the wallet
--nocheck Do not verify aliases
-u, --unsigned Do not sign transaction
--rbf RBF Replace-by-fee transaction
-W PASSWORD, --password PASSWORD
Password
--locktime LOCKTIME Set locktime block number
global options:
-v VERBOSITY Set verbosity (log levels)
-V VERBOSITY_SHORTCUTS
Set verbosity (shortcut-filter list)
-D ELECTRUM_PATH, --dir ELECTRUM_PATH
electrum directory
-P, --portable Use local 'electrum_data' directory
-w WALLET_PATH, --wallet WALLET_PATH
wallet path
--testnet Use Testnet
--regtest Use Regtest
--simnet Use Simnet
Do read BitCryptex's post first tough!!! He's spot on when he told you there is no such thing as an automatic fee!!! If you manually create a transaction using the paytomany console command, and you chose a "default" fee, you'll either be (grossly) overpaying, or (grossly) underpaying... So you'll either get a fast confirmation at a price that's way to high, or your transaction will get stuck (unconfirmed in the mempool of many nodes) for a potentially long time. An other option would be to export your private keys, import them into core and use core's cli, or use coinb.in to create an unsigned transaction and sign it from electrum's console |
|
|
|
couldn't agree more... Ik heb steeds het gevoel dat ik de charts moet in de gaten houden, zodat ik bij een spike of een dip kan reageren, maar in praktijk doe ik dat toch niet (ik ben een HODL'er) |
|
|
|
Ik heb een appje op m'n telefoon staan... elke keer als ik mijn telefoon ontgrendel staan alle koersen van de coins die ik in m'n (beperkte) portfolio heb recht voor m'n neus  50 keer per dag kijken, minstens. |
|
|
|
HI HCP, many thanks for the advice - would you recommend a different desktop wallet other than Electrum? I had looked at Atomic and Exodus briefly before plumping for Electrum, maybe time to revise that?
From my reading, if I were to go the route I am planning then hardware wallets would be redundant so think sticking with the desktop/cold wallet route will keep things secure enough.
Out of those 3 options (Atomic, Exodus and Electrum), i'd defenately advise you to stick to electrum! I've re-read HCP's post, but i couldn't find the part where he advised you to switch to a different desktop wallet... As far as hardware wallets go: why do you think they'd be redundant? Desktop wallets are fine for holding petty cash, but if you're serious about investing in crypto, i'd defenately advise you to buy a decent hardware wallet. Cold (airgapped) wallets are perfect for people that have invested millions and don't mind the extra hoops you have to jump trough when receiving or spending funds... If you want a high level of security, but prefer an easy to use wallet, spend $100 and buy a ledger or a trezor (just my two satoshi's tough). Security-Wise, it's more or less like this: - unlicenced exchange wallets/unlicenced casino wallets => extremely unsecure, really confusing (all functions are propiatory, they can close accounts, they scam, they get hacked,...)
- licenced casino wallets => extremely unsecure (all functions are propiatory, they can close accounts, they get hacked,...)
- licenced exchange wallets (like coinbase) => unsecure (all functions are propiatory, they can close accounts, they get hacked,...)
- licenced online wallets (like blockchain.info) => unsecure (all functions are propiatory, they can close accounts, they get hacked,...)
- mobile wallets => relatively unsecure (risk of malware, risk of thefth of your device)
- desktop wallets => relatively secure (risk of malware, phising, vulnerability's,...)
- paper wallets => extremely secure (given that they were generated properly)
- hardware wallets => extremely secure (given that you bought a "decent" wallet that's endorsed by the community and keep it's firmware up-to-date)
- AIRGAPPED, COLD desktop wallets, preferably non-HD updated core => extremely secure (given that you setup everything properly). But spending funds is confusing for newbies
|
|
|
|
Did you create an account and this topic just to leave a link?
Yes.... Yes, he did... 99,9% sure this dude is either the owner, or a payed shill, so i wouldn't pay any attention to any positive reviews he gives about this site or it's operator(s) and use your due diligence if, for some strange reason, you'd decide to visit a clearnet site that seems to be trying to offer darknet services. |
|
|
|
|
Waarom enkel 1Gr bars aan €50.36/gram? Je concurrenten bieden bars van 1Gr, 5Gr, 1 Ounce, 50 Gr, 100 Gr, 10 Ounce, 1 Kg,... Hoe groter de bars, hoe korter bij spotprijs.
Bitgild gaat rond ~44.5€/gram voor bars >= 100 Gr.
|
|
|
|
|
I've created several sites in the past, like a proof of concept mixer, and i'm currently helping an other person to setup a small non-automated exchange (basically, a webpage that fetches the latest exchange rates of several coins, adds a profit margin and lets people create orders for these tradepairs, while the orders themselfs are filled manually).
Based on these experiences, i can tell you that a site like shapeshift isn't just slapping a nulled script on a shared host and let the money roll in...
You'll need a way to keep your hot wallets safe while still being able to generate and broadcast transactions... This alone is quite a setup, let alone creating a good user interface, or creating the algorithm that needs to be created to make sure you never sell at a loss. I didn't even talk about encryption, data retention, logging, letters of guarantee, KYC...
There might be legit scripts out there, but i'd defenately urge you to go with an official script that's community vetted...
Exchanges are actual businesses, and they need to be run as such... Meaning, you'll need a good dev, or purchase a high quality script from a good dev. You'll need dedicated hosting, licences, a company, support staff (to help you customers while you are sleeping or taking a couple days off)... If you start an anonymous exchange on yourself with a cheap or free script, without a licence, i can pretty much guarantee you'll be hacked in a matter of months, and if not you'll probably fail anyways or you'll be shut down by your governement sooner or later.
|
|
|
|
Hi... First of all, welcome Secondly, before you do anything else, there are two important remarks i need to make before you continue: - Firstly: in case you're not kidding, and you'll actually invest a lot of money, don't go for a desktop wallet! Go for an airgapped setup, properly generated paper wallets or hardware wallets
- Secondly: a lot of phising sites are offering scamversions of electrum... Did you verify electrum's signature? The binary HAS to be signed by ThomasV
In case you were kidding about those millions you're going to invest, and you'll actually just be playing around with pocket change: could you elaborate about what's going wrong with electrum's installer? A screenshot or an error message tells us a lot about what might be going wrong |
|
|
|
|
Show Posts
