Frequently Asked Questions – Bitcoin Electrum

Electrum users, I was just starting with bitcoin mining & i use Nicehash, I put my Electrum address & in 2 weeks i have mined $10 worth of btc, But now i check my Electrum & my address has changed. What can i do to change it back or make the money sent to that address redirect to the current one?

I know i shouldn't have used the "change addresses" tick option but i didn't know it existed or what it was supposed to do back then. I'd really appreciate some help :)
submitted by Namoor3 to Bitcoin [link] [comments]

Electrum users, I was just starting with bitcoin mining & i use Nicehash, I put my Electrum address & in 2 weeks i have mined $10 worth of btc, But now i check my Electrum & my address has changed. What can i do to change it back or make the money sent to that address redirect to the cu /r/Bitcoin

Electrum users, I was just starting with bitcoin mining & i use Nicehash, I put my Electrum address & in 2 weeks i have mined $10 worth of btc, But now i check my Electrum & my address has changed. What can i do to change it back or make the money sent to that address redirect to the cu /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Electrum users, I was just starting with bitcoin mining & i use Nicehash, I put my Electrum address & in 2 weeks i have mined $10 worth of btc, But now i check my Electrum & my address has changed. What can i do to change it back or make the money sent to that address redirect to the current one?

I know i shouldn't have used the "change addresses" tick option but i didn't know it existed or what it was supposed to do back then. I'd really appreciate some help :)
submitted by Namoor3 to Bitcoin [link] [comments]

Checking/polling a balance of an address in Electrum via the command line/RPC /r/Bitcoin

Checking/polling a balance of an address in Electrum via the command line/RPC /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Cold storage questions

I'm going to be investing in a hardware wallet this week.
Will I still be able to send btc to a fresh address every time or do you reuse the receive address?
Is there any way for me to check the balance without plugging it in all the time? I like to confirm what I sent went to where I sent it.
Is there anything else I should know about it?
submitted by moneyhelpquestions to Bitcoin [link] [comments]

Problem with order cancelled on darkmarket

I made a 200euro order on sunday on darkmarket. Market had problem from monday to yesterday i Think and my order got cancelled idk if due to the market or vendor cancelled it but now ho do i get back my money? On my Wallet (coinbase) i have zero and i m new to this market so i have no idea how it works... please help me i m so worried and sry for my bad english
submitted by flore690 to darknet [link] [comments]

First Timer

So i just got into bitcoin and i bought some off the bitcoin.com app. I tried to send my bitcoin over to my electrum wallet ( paid about a $7 fee) and in my bitcoin transaction it only shows the $7 fee was removed and on electrum on the Receive tab all it says is pending. Ive been waiting about 30 min and my balance is still 0.00. Did i do something wrong or do i just need to be more patient? Ive been reading that the fee you pay determines how fast the transaction occurs? So maybe the $7 is the reason its taking so long? Idk if this matters but I was trying to transfer over about $100 USD worth of bitcoin.
submitted by RadDvn to Electrum [link] [comments]

Bitcoin Newcomers FAQ - Please read!

Welcome to the /Bitcoin Sticky FAQ

You've probably been hearing a lot about Bitcoin recently and are wondering what's the big deal? Most of your questions should be answered by the resources below but if you have additional questions feel free to ask them in the comments.
It all started with the release of the release of Satoshi Nakamoto's whitepaper however that will probably go over the head of most readers so we recommend the following videos for a good starting point for understanding how bitcoin works and a little about its long term potential:
Some other great resources include Lopp.net, the Princeton crypto series and James D'Angelo's Bitcoin 101 Blackboard series.
Some excellent writing on Bitcoin's value proposition and future can be found at the Satoshi Nakamoto Institute.
Some Bitcoin statistics can be found here and here. Developer resources can be found here. Peer-reviewed research papers can be found here.
Potential upcoming protocol improvements and scaling resources here and here.
The number of times Bitcoin was declared dead by the media can be found here (LOL!)

Key properties of Bitcoin

Where can I buy bitcoins?

Bitcoin.org and BuyBitcoinWorldwide.com are helpful sites for beginners. You can buy or sell any amount of bitcoin (even just a few dollars worth) and there are several easy methods to purchase bitcoin with cash, credit card or bank transfer. Some of the more popular resources are below, also check out the bitcoinity exchange resources for a larger list of options for purchases.
Here is a listing of local ATMs. If you would like your paycheck automatically converted to bitcoin use Bitwage.
Note: Bitcoins are valued at whatever market price people are willing to pay for them in balancing act of supply vs demand. Unlike traditional markets, bitcoin markets operate 24 hours per day, 365 days per year. Preev is a useful site that that shows how much various denominations of bitcoin are worth in different currencies. Alternatively you can just Google "1 bitcoin in (your local currency)".

Securing your bitcoins

With bitcoin you can "Be your own bank" and personally secure your bitcoins OR you can use third party companies aka "Bitcoin banks" which will hold the bitcoins for you.
Note: For increased security, use Two Factor Authentication (2FA) everywhere it is offered, including email!
2FA requires a second confirmation code to access your account making it much harder for thieves to gain access. Google Authenticator and Authy are the two most popular 2FA services, download links are below. Make sure you create backups of your 2FA codes.
Google Auth Authy OTP Auth
Android Android N/A
iOS iOS iOS

Watch out for scams

As mentioned above, Bitcoin is decentralized, which by definition means there is no official website or Twitter handle or spokesperson or CEO. However, all money attracts thieves. This combination unfortunately results in scammers running official sounding names or pretending to be an authority on YouTube or social media. Many scammers throughout the years have claimed to be the inventor of Bitcoin. Websites like bitcoin(dot)com and the btc subreddit are active scams. Almost all altcoins (shitcoins) are marketed heavily with big promises but are really just designed to separate you from your bitcoin. So be careful: any resource, including all linked in this document, may in the future turn evil. Don't trust, verify. Also as they say in our community "Not your keys, not your coins".

Where can I spend bitcoins?

Check out spendabit or bitcoin directory for millions of merchant options. Also you can spend bitcoin anywhere visa is accepted with bitcoin debit cards such as the CashApp card. Some other useful site are listed below.
Store Product
Gyft Gift cards for hundreds of retailers including Amazon, Target, Walmart, Starbucks, Whole Foods, CVS, Lowes, Home Depot, iTunes, Best Buy, Sears, Kohls, eBay, GameStop, etc.
Spendabit, Overstock and The Bitcoin Directory Retail shopping with millions of results
ShakePay Generate one time use Visa cards in seconds
NewEgg and Dell For all your electronics needs
Bitwa.la, Coinbills, Piixpay, Bitbill.eu, Bylls, Coins.ph, Bitrefill, LivingRoomofSatoshi, Coinsfer, and more Bill payment
Menufy, Takeaway and Thuisbezorgd NL Takeout delivered to your door
Expedia, Cheapair, Destinia, Abitsky, SkyTours, the Travel category on Gyft and 9flats For when you need to get away
Cryptostorm, Mullvad, and PIA VPN services
Namecheap, Porkbun Domain name registration
Stampnik Discounted USPS Priority, Express, First-Class mail postage
Coinmap and AirBitz are helpful to find local businesses accepting bitcoins. A good resource for UK residents is at wheretospendbitcoins.co.uk.
There are also lots of charities which accept bitcoin donations.

Merchant Resources

There are several benefits to accepting bitcoin as a payment option if you are a merchant;
If you are interested in accepting bitcoin as a payment method, there are several options available;

Can I mine bitcoin?

Mining bitcoins can be a fun learning experience, but be aware that you will most likely operate at a loss. Newcomers are often advised to stay away from mining unless they are only interested in it as a hobby similar to folding at home. If you want to learn more about mining you can read more here. Still have mining questions? The crew at /BitcoinMining would be happy to help you out.
If you want to contribute to the bitcoin network by hosting the blockchain and propagating transactions you can run a full node using this setup guide. If you would prefer to keep it simple there are several good options. You can view the global node distribution here.

Earning bitcoins

Just like any other form of money, you can also earn bitcoins by being paid to do a job.
Site Description
WorkingForBitcoins, Bitwage, Cryptogrind, Coinality, Bitgigs, /Jobs4Bitcoins, BitforTip, Rein Project Freelancing
Lolli Earn bitcoin when you shop online!
OpenBazaar, Purse.io, Bitify, /Bitmarket, 21 Market Marketplaces
/GirlsGoneBitcoin NSFW Adult services
A-ads, Coinzilla.io Advertising
You can also earn bitcoins by participating as a market maker on JoinMarket by allowing users to perform CoinJoin transactions with your bitcoins for a small fee (requires you to already have some bitcoins.

Bitcoin-Related Projects

The following is a short list of ongoing projects that might be worth taking a look at if you are interested in current development in the bitcoin space.
Project Description
Lightning Network Second layer scaling
Blockstream, Rootstock and Drivechain Sidechains
Hivemind and Augur Prediction markets
Tierion and Factom Records & Titles on the blockchain
BitMarkets, DropZone, Beaver and Open Bazaar Decentralized markets
JoinMarket and Wasabi Wallet CoinJoin implementation
Coinffeine and Bisq Decentralized bitcoin exchanges
Keybase Identity & Reputation management
Abra Global P2P money transmitter network
Bitcore Open source Bitcoin javascript library

Bitcoin Units

One Bitcoin is quite large (hundreds of £/$/€) so people often deal in smaller units. The most common subunits are listed below:
Unit Symbol Value Info
bitcoin BTC 1 bitcoin one bitcoin is equal to 100 million satoshis
millibitcoin mBTC 1,000 per bitcoin used as default unit in recent Electrum wallet releases
bit bit 1,000,000 per bitcoin colloquial "slang" term for microbitcoin (μBTC)
satoshi sat 100,000,000 per bitcoin smallest unit in bitcoin, named after the inventor
For example, assuming an arbitrary exchange rate of $10000 for one Bitcoin, a $10 meal would equal:
For more information check out the Bitcoin units wiki.
Still have questions? Feel free to ask in the comments below or stick around for our weekly Mentor Monday thread. If you decide to post a question in /Bitcoin, please use the search bar to see if it has been answered before, and remember to follow the community rules outlined on the sidebar to receive a better response. The mods are busy helping manage our community so please do not message them unless you notice problems with the functionality of the subreddit.
Note: This is a community created FAQ. If you notice anything missing from the FAQ or that requires clarification you can edit it here and it will be included in the next revision pending approval.
Welcome to the Bitcoin community and the new decentralized economy!
submitted by BitcoinFan7 to Bitcoin [link] [comments]

Ledger nano s. Is my bitcoin gone!? Please help

In 2018 I stored some BTC into my ledger wallet. I used a google app called ledger manager.
Today I went to go check on it. I had to download ledger manager live. So I did that and updated my ledger nano s wallet. It said that I have 0BTC in my account. I had to check my other coin which is XRP and it showed that there was some XRP in my account. Was my BTC stolen? I have had it hidden for years so I don’t know what is going on.
I have all my secret phrase words but I am afraid of trying a “reset wallet using recovery phrase” because I am afraid that if I do have the bitcoin still hidden somewhere in my wallet I would delete it by “reset with recovery phrase”.
I tried looking up my address on block explorer. Either I’m looking at the wrong wallet address or I am clueless to what I am doing as block explorer showed me that my address (at least the one I think I have) has a 0 balance and has never had transactions before. I did make sure that I had my btc in my ledger before hiding it away for about 2 years.
My heart has sunk very low with this experience I would really appreciate any help I can get.
Much love to all
Thank you
submitted by winehippietree to ledgerwallet [link] [comments]

Everyday info sec, hardcore info sec, and DNMs

Edit: Currently writing a new version of this, dont know when it will be done.
Edit: Since first post I have updated a few sections with additional information.
I recommend reading it all even if it is very long, I might have placed some relevant info in different sections while thinking about what else needed to be added, plenty of steps remains mostly the same except when I comment directly on it. It is not necessary to do 100% security all the time, unless you absolutely need it, combining some high and some lower security ideas for a balance of security and convenience is useful.
I will base this mostly on Windows, Linux users probably know this, and I have no idea how apple machines work (tho many things in here are still relevant for other operating systems, as they are just general tips)
Disclaimer: There are certainly other steps that can make you more anonymous or safer, however I think for most people this will surfice. Any software I recommend should be independently verified for security, and examples of software are not to be taken as endorsements. I simply use examples and give recommendations when I believe it necessary, or helpful.
I will not really differentiate between anonymity and security, they are often the same thing. As such the word security can mean either more anonymous, less vulnerable, or both.
--------
Everyday Simple Info Sec:
-There could be a hidden administrator user on your PC, make sure to change its password
(Snapchat msgs, reddit dms, discord msgs, are just a few examples of msgs that are never encrypted)
-Any info even send in encrypted msgs (and obviously non encrypted) should still be kept with possible deniability, don't say "I'm gonna do MDMA", say "I'm going out with molly."
-DO NOT STORE ANY PASSWORDS ON GOOGLE, IF GOOGLE LOGIN IS AUTHENTICATED IT WILL AUTFILL ALL PASSWORDS IT HAS SAVED (same with other similar services) (This means if you are logged in to chrome and someone has access to your machine, they can auto fill passwords without entering a single password)
-use a rememberable passphrase, especially for your master key ring aka password manager A long sentence that is memorable makes an okay password (decent example,: "I met my wife at Little Ceasers for the first time on 07/09/20" better even if it's just something you know, if its impersonal, and if you can add special characters or numbers that you won't forget) (A better example for a passphrase is: "There is 0nly 0ne letter that d0esn’t appear in any U.S. state nameQ")
-Purge your internet activity frequently, there's a reason why I only have one post, and a few comments appearing in my account, but thousands of kama. Exposing information needlessly is not good.
-Never post private information publicly, and if you do, do it vaguely as possible. (Example: Not "I'm 15", say "I'm a teenager") Do not post any vital information ever, no birthdays, mother's maiden name, age, or anything you have ever seen in a security question. Never post your current activities while they are ongoing. You going on a vacation? Don't announce it to the world, taking picture there? Post them when you are home.
-Rethink how you do security questions. Many answers to security questions can be found in your internet history. One could use the first word of the security question as an answer, or a different sceme that will mean you always remember it. (Security question need to go, the amount of personal info an average person puts on the internet makes it easy to attack anything using security question)
-------_
High level crimimal information security:
The motto here is, "All the Security, All the Time" As one fuck up can end with you leaving a lick of traceability, and you could be fucked.
Pre Note: All of your software should always be up to date. Also even perfect info sec does not guarantee you are completely safe, a new zero day (exploit) can still fuck you, but good info security makes you significantly safer, by eliminating as many attacks as possible.
-Get a new device (or make a already owned device seem like you never owned it, do this only if you know how to, there's a lot of stuff that goes into that, like changing your mac adress etc) buy with cash, and your face covered, preferably far away from where you live. (Do I need to specify to not bring your phone or anything else that tracks your location to anywhere you want to go anonymously?) (Be aware that even hardware can have vulnerabilities, many cpus have known vulnerabilities, I can't list them all, do some research before buying)
-If you know how to use Tails (A linux distro designed for Info sec) use that, preferably on a USB. (Or learn how to use tails, its better, but complicated) Otherwise a clean copy of windows (make sure its not in any way associated with you) can do the job too, tho not as well. (Using a VM might give extra security, since VMs usually erase all data and RAM they were using on shutdown)
-Get a non tracking VPN, Enable the kill switch (a setting that disables all traffic that doesn't go through the VPN) (change your firewall settings to only allow the traffic from the VPN, windows guide (Change settings so only traffic from the tor application is send) Edit: (Due to complaints: do not use vpn over tor, use tor over vpn. tor over vpn has no notable downside, if the VPN logs it makes no difference, your ISP will always log anyways, and vpns remove other attack vectors and also provide backup security should tor fail. Again even if the VPN tracks you only change the people doing the tracking, but now you are further removed making it more anonymous and also with less vulnerabilities)
-rember privacy settings, cookie cleaner, and antivirus, password (There could be a hidden administrator user on your PC, make sure to change its password)
-Always use the device on a non admin account
-Ideally use this device only on networks that are not connected with you. Such as public networks (try to never use the same public networks twice, move around) (a home network should be fine now, as it should never be exposed, but more security is always better) (Its just a conveniences vs security trade)
-Never use accounts that have been exposed to lower security on higher security machines
-your browser is now TOR (or your preferred security focused browser, if you dont plan on using onion ) Make sure you get the standalone version of tor not the addon build (the standalone is safer, because there are less settings and options to tweak)
-Change your tor settings, to safest mode, enable a bridge (to my knowledge there's no difference in security between the build in bridges in tor), enable automatic updates, set duckduckgo onion as your primary browser. Set dark.fail onion page as your home page. (Or your preferred privacy search engine and onion directory)
-------_
How to use dark net markets (DNMs)
If you finished your High Security setup, we can dive right in. Otherwise go do that. This is where all that is essential.
Quick info on Tor, and onion sites. There is no search engine. It's all based of directories and addresses you are given by others. Tor will likely not be very quick, it has to pass through multiple networks to get to the destination. DNMs sometimes exit scam, an exit scam is when a market shuts down completely and takes all the money, this is a risk when using DNMs, it's not too common but happens maybe 0-4 times a year. The admins of thoese servers need to get out at some point, before they get jailed, so they exit the game, and scam everyone out of their money.
-A very useful onion directory is dark.fail it has a lot of links, for all kinds of stuff. News, email, DNMs, Psychonautwiki (harm reduction website), forums etc. (Other directories also exist)
-Pick a market, preferably one that handles secure connection server side instead of requiring you to establish the secure connection. Then create an account. Your account once created should include an entry box in your profile for a pgp key, post your PUBLIC key in there. (Verify the link is not a scam, most markets should provide a pgp signature)
-Next is currency setup. All major cryptocurrency exchangers can be used, I can recommend coin base but there could be better ones out there. Unless you find a small non U.S., exchange, they will always ask for your identity. So unless you can find a trustworthy exchange that doesn't ID, you will need to give it to them. (Side note, all major crypto exchangers report to the IRS, if the IRS asks you if you bought cryptocurrency and you bought while having IDed yourself SAY YES, DO NOT COMMIT TAX FRAUD WHEN THEY KNOW YOU DID)
-Transfer (monero you can send directly, btc you should scramble) to your wallet. There are two options a cold wallet (physical) or a software wallet. Software wallets usually dont cost anything so I recommend them, even if often less safe. Electrum is easy to use, and pretty safe. You can also do your own research and find a wallet that fits your needs.
-now you are ready to buy, only buy using escrow (it means the money is held by the market as a middle man until the product is delivered, they will also handle any issues like wrong quantity, cuts, etc), judge the reviews for a product, and if available look at the history of the vendor, until you find a product from a vendor you trust. (I recommend to buy within your country as much as possible, so it doesn't go through customs, it's very rare that something is found, but it can happen)
-now you get to buy, depending on market, you either have cryptocurrency stored in their wallets (not recommend, you will lose it in an exit scam) or you can send it every order. When you send your delivery adress (or the one you want it to go to) encrypt the adress using the sellers public key. Make sure the adress is correct.
-wait for the product, make sure to extend the escrow until the product arrives, if you can't extend it anymore dispute the order, and a moderator will step in
-test the product, use it, and leave a review. PLEASE LEAVE A REVIEW, DNMs only work because of reviews.
Edit: Didn't imagine I would write over 15000 words. Oh well, it was fun. Hope it helps, if you have any questions feel free to ask.
No idea how long this will stay up, I might purge it in 7 days, or never.
submitted by seven_N_A7 to u/seven_N_A7 [link] [comments]

Avoid blockchain.com wallet at all costs

Seriously. Their web app and mobile app generated a receiving bitcoin address that wasn’t even connected to my account. Get sent a decently sized payment and it just disappears into the void. Can’t recover it at all. Checked the blockchain explorer, electrum, etc. it’s been 3 weeks, support closed my ticket with no help, and the BTC is sitting in the address still unspent. Piece of shit company
submitted by avva to Bitcoin [link] [comments]

Hey guys, finally managed to import my seed into Electrum from blockchain wallet. It shows my transactions, but my balance is 0 BTC? Still shows the full balance in my blockchain wallet

I'm missing a step somewhere
submitted by AmazingPension to Bitcoin [link] [comments]

Copying a pruned blockchain

Hi, I'm downloading the entire blockchain as we speak. It takes quite a while and I would therefore like to make a copy of the blockchain in case I need to get a new computer. Does anyone know if I can copy the pruned blockchain to the new computer in the same way I can copy the full blockchain?
Thanks!
submitted by rumi1000 to Bitcoin [link] [comments]

Is trading btc with someone a similar process to buying/selling btc?

In a couple of subreddit exchanges some people prefer btc instead of other regular payments, but I've not really sure how it works? I've bought a few things with btc but sent the payments directly from my btc wallet. Can I do it the same way but instead send it to a person? Also how long is it safe to hold btc in a wallet such as electrum? Typically I use the btc once it transferred, but if I wanted to store some btc to make transfers quicker.
submitted by Littleonesmind180 to BitcoinBeginners [link] [comments]

Checking for btc sending address. Help.

I re-installed electrum after a long time and reloaded my old wallet. As i wanted to check on a purchase transaction from a few years ago.
I clicked on it and it provided details i do not understand.
How do i find out the sending address? What is the btc address my btc was deducted from to make the payment.
Thanks.
Edit: when i search the transaction id with various block chain explorers, it lists as input/output or sendereceiver sometimes. And my bitcoin address is there. I think that shd be it?
https://postimg.cc/R3F73T0W
submitted by Kazozo to Electrum [link] [comments]

Sent money to Wallet, unconfirmed for a day then money sent to unknown address. Money Stolen???

I am somewhat familiar with Electrum and its basic functions. I have made over 30 transactions but yesterday was my first to have something like this happen. After buying bitcoin on `, and attempting to withdraw it i was notified that withdraw was initiated. Usually i get a txt that its been confirmed in the blockchain after 10mins but i didn't receive it until 14 hours later. ( i assume its because the fee were high b/c of the jump in btc price) after going to my electrum wallet to check the balance i see the amount had been sent to an unfamiliar address. have i been hacked? the output is not any address i use. I should add the transaction appeared shortly after making the transfer from cashapp to electrum which confused me but i assumed it would resolve itself. any advice or help? im currently downloading coinbase to avoid this from happening again
submitted by Akelekid123 to Electrum [link] [comments]

Storing your coins safely while not risking loss of keys

This was originally an answer to a question that was asked here, but OP deleted their post.
This might help some newbies (especially the multisig edit at the end), so I want to make sure it's still accessible here.
The original question was whether the Electrum wallet stores a Trezor's private key when using a passphrase.
OP noticed that their Trezor wouldn't connect to their Electrum wallet when entering a different passphrase than they used when creating the wallet. Thus, OP (likely) assumed that the wallet stored the private key, as it somehow knew that a different private key was now used.
Here is my original answer (with some modifications):
IMPORTANT: I'm assuming here that you connected your Trezor by choosing the "hardware wallet" option in Electrum, rather than giving Electrum your 12/24 seed words.
TL;DR: No, your coins are safe :)
I'm assuming by passphrase) you mean the 25th (or 13th) word. When you have this feature enabled, a private key gets generated every time you enter a passphrase. When you enter the same passphrase you used to create the wallet, the wallet with your funds shows up.
Whenever you enter something different, a different private key is generated on your Trezor. This allows you to have multiple different wallets, for example by choosing the passphrases "First Wallet", "Second Wallet", "Third Wallet", or a secret wallet with a secret passphrase.
So whenever you enter a new passphrase when connecting your Trezor to Electrum, the Trezor will send a new public key to Electrum. Electrum will then derive addresses from this public key and check those for balances. It won't find any, as you used a new passphrase.
EDIT: I just realized that you said your wallet doesn't connect to Electrum when you use a different passphrase. This is simply because Electrum doesn't receive the correct public key from the Trezor and therefore Electrum thinks it's a different wallet (which it is).
When you enter the passphrase you used during creation of your wallet, the Trezor will send your actual public key to Electrum, which will then find addresses with balances, which it will show to you. EDIT (to clarify): Connecting your Trezor after creating the wallet is only necessary to send funds or verify addresses, as the public key is already stored in the wallet.dat.
The only thing Electrum actually stores is the public key, which can only be used to look at your Bitcoin, not to move them. You might want to keep this public key a secret as well though, since it links all your funds to you. This is what Electrum stores in the wallet.dat file, which you can just encrypt by choosing a password for it.
Well done using a passphrase by the way! Should someone get their hands on your Trezor, a sophisticated attacker can get the secret key off the device in 15 minutes. Using a passphrase makes this attack almost useless, as the both secret key AND the passphrase are needed to move your funds, and the passphrase is not stored on the device. A passphrase also allows you to hide funds from potential robbers that force you to unlock your wallet.
You can do this by activating the passphrase feature and sending your funds to a wallet with a secret passphrase (do NOT lose this, as losing your passphrase renders your funds inaccessible). Afterwards, you can safely deactivate the passphrase feature, so the device doesn't even ask for one should you get robbed. Simply reactivate it when you need to access your funds.
EDIT: Should you be worried that you might forget your passphrase, you should look into multisig wallets. Depending on how you set this up, you can make it more secure against theft and less likely for you to lose access to your funds.
Say for example you get four wallets: two hardware wallets, a well-protected (airgapped) laptop with Electrum, and a secure mobile wallet that allows for multisig (like Fully Noded).
You can then create a 2-of-4 multisig wallet that requires you to sign transactions with any two of these four wallets.
The increase in security comes from the fact that an attacker now needs full access to two of your devices (or their stored private keys) at once.
At the same time, the fact that you yourself now also need access to only half of your devices means that in the event of a total loss of one (or even two) of them, you can still move your funds to a new wallet.
As long as you do regular checks (e.g. first day of each month), ensuring that you still have access to all your devices' stored private keys, you can always catch a loss of keys and fix this without losing funds (by creating a new multisig wallet and sending the funds there).
This allows you to use a passphrase on your wallets without storing it anywhere physically or digitally. This would usually be very risky, as forgetting the passphrase would lead to a loss of funds, but this risk is now close to eliminated.
(The following part was not in the original answer)
Some IMPORTANT general secruity tips:
  1. Consider including trusted friends and/or family members as co-signers for a multisig wallet. This ensures that it's not even possible for you alone to hand over funds to an attacker. Depending on your level of trust, you might want to make sure that your co-signers can't collaborate to steal your funds (if you include 3 people, create at least a 4-of-n multisig). You could also deliberately make it possible for all or even just some of your co-signers to move your funds (3 co-signers, 3(or less)-of-n multisig) to make sure your funds aren't lost should pass away unexpectedly.
  2. Consider running your own full node and Electrum server (also check the alternatives), which you connect your Electrum wallet to. This ensures that you don't send your public key to anyone else. If someone knows your public key, they know how much BTC you own, making you a potential target.
  3. Always encrypt your wallet.dat (or whatever you called your wallet file), even if it's a watch-only wallet. This protects your public key (see 1. for why you want that).
  4. Create watch-only wallets: Use an airgapped) device to create a wallet with Electrum (make sure to back up the seed phrase) and export the public key. Then create a new watch-only wallet on another device (like your everyday laptop) with that public key to be able to check your funds. To create the initial wallet, you can also use any other hard- or software wallet that allows you to export the master public key.
  5. Hide, or (when using a hardware wallet with a passphrase) even delete your watch-only wallets. Hiding your funds makes you less of a target. When using a hardware wallet, recreating the watch-only wallet is fast and simple, so you don't need to store it if you don't want to check your funds every day. Note that this approach doesn't help much when you don't use a passphrase, as an attacker will obviously check the passphrase-less wallet no matter what.
  6. Keep some funds on your hardware wallet(s). If an attackers sees funds on the wallet(s), they might not force you to enter a passphrase or ask if you have any multisig wallets (lying under pressure is hard).
  7. Hide all your wallets in different places. If someone sees that you have multiple wallets lying around, they might realize you have a multisig wallet.
  8. Don't risk a robber getting (for example) two keys to your 2-of-4 multisig wallet and then racing them to move your funds with the other two keys when they leave. They're gonna come back and be pissed. If it comes to this, you need protection until the robber is caught. STAY SAFE!
  9. The easiest way to solve a problem is to never have it. Don't make yourself a target. If nobody even suspects that you have a multisig (or any wallet at all), they're probably not gonna look for it.
Please correct any mistakes you find and I will edit my post. I will also gladly add more tips to the list. I will of course credit anyone who helps.
Tip for devs who want something cool and important to work on: Make the creation and usage of multisig wallets as noob-friendly as possible. If someone expresses worries about losing access to their funds by forgetting the seed phrase, wallet pin, etc. (someone in my family actually brought this up to me), multisig wallets are the perfect solution as they add redundancy.
submitted by Fittiboy to Bitcoin [link] [comments]

Electrum improperly importing BC1 Private Key from Exodus

I'm testing cross compatibility. I exported a Bitcoin Address and Private Key from Exodus and tried to import the private key into Electrum. I've followed the instructions at: https://medium.com/@lindseymiles/importing-your-private-keys-into-electrum-bitcoin-wallet-14071ab26dfe
For this public address, 1CmouyRm1ubuzv4EN7FB5qBD1vTJwAVNgQ, I can properly import it's private key and get a display of coins.
For this public address, bc1qt3vld7yrzfv564f3qmquu36c2r3aq6pp7wwht6, when I import its private key, I get nothing on the screen. but when I check into details I get 19RJwWRrcXxqEtrM9wFMSvSrNcYuk46q36 as the public address.
These are not the same thing.
bc1qt3vld7yrzfv564f3qmquu36c2r3aq6pp7wwht6 has 0.00057468 BTC
19RJwWRrcXxqEtrM9wFMSvSrNcYuk46q36 has 0 BTC
Can Electrum not import BC1 public addresses?
submitted by Gyther0 to Electrum [link] [comments]

Bitcoin Address Observer

Recently a friend of mine and his girlfriend got their first child. Like I always do, I printed a paper wallet, transferred some Satoshis on it, put it in a sealed envelope and gave it to the parents with the order, to give it to him when he reaches adulthood. Because the new born kid should not suffer from the ignorance of his parents not buying some Satoshis when it was cheap. :)
I trust my friend for not opening the envelope, no matter what the price is doing in all those years. But I don't trust his girlfriend. :) So I decided to develop an app to track specific Bitcoin addresses which informs you when something happens on this address. And here it is (Android only): https://play.google.com/store/apps/details?id=com.ceaver.bao
It's probably useful for many other usecases as well, if you e.g. have a Bitcoin donation address at the end of your Medium article or just want to be sure your money is still where you expect it to be. :)
It's open source, the code is here: https://github.com/kayth1/Bitcoin-Address-Observer
The app is using the blockchain explorer of Blockstream to check the addresses. No data is sent to anywhere else and it's free of any adds.
I'll be happy about every feedback :)
PS. Yeah I know there are a few other app doing same or similar... but I didn't like them.
submitted by kayth1 to Bitcoin [link] [comments]

How to Store Your Bitcoin

Before holding any bitcoin, you need somewhere to store it. Just like in the physical world, you store your bitcoin in a wallet.
Similar to a bank account number, your wallet comes with a wallet address that shows up in a ledger search and is shared with others so you can make transactions. This address, which is a shorter, more usable version of your public key, consists of between 26 and 35 random alphanumeric characters, something like 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa. Keep in mind that every letter and number in that address is important. Before sending any bitcoin to your wallet, double-check the entire address, character by character.
Also tied to your wallet address is one or more private keys, which as the name suggests should not be shared with anyone. Keys are used to verify you own the aforementioned public key, and to sign off on transactions. Some wallets create a secure seed phrase, a set of words that will allow you to unlock your wallet if you lose your keys. Print this phrase out and keep it in a safe place.
The unfortunate truth is your bitcoin wallet is akin to your physical wallet. If you lose the private keys to your wallet, you’re most likely going to lose the currency in it forever.
Your wallet generates a master file where your public and private keys are stored. This file should be backed up in case the original file is lost or damaged. Otherwise, you risk losing access to your funds.
You can store your private keys on your computer, mobile device, on a physical storage gadget or even on a piece of paper. It’s crucial that you keep your private keys safe by generating backups both online and offline.
Remember: Your wallet does not reside on any single device. The wallet itself resides on the Bitcoin blockchain, just as your banking app doesn’t truly “hold” the cash in your checking account.
While wallet apps work well and are relatively safe, the safest option is a hardware wallet you keep offline, in a secure place. The most popular hardware wallets use special layers of security to ensure your keys are not stolen and your bitcoin is safe. But, once again, if you lose the hardware wallet your bitcoins are gone unless you have kept reliable backups of the keys.
The least-secure option is an online wallet, i.e. storing your bitcoin in an exchange. This is because the keys are held by a third party. For many, the online exchange wallets are the easiest to set up and use, presenting an all-too-familiar choice: convenience versus safety.
Many serious bitcoin investors use a hybrid approach: They hold a core, long-term amount of bitcoin offline in so-called “cold storage,” while keeping a spending balance in a mobile account.
Depending on your bitcoin strategy and willingness to get technical, here are the different types of bitcoin wallets available. Bitcoin.org has a helper that will show you which wallet to choose.
Cloud wallets exist online and the keys are usually stored in a distant server run by a third party. Cloud-based wallets tend to have a more user-friendly interface but you will be trusting a third party with your private keys, which makes your funds more susceptible to theft. Some examples of this wallet type are Coinbase, Blockchain and Lumi Wallet. Most cryptocurrencies, including bitcoin, have their own native wallets. Some offer additional security features such as offline storage (Coinbase and Xapo).
With your private keys stored on a server, you have to trust the host’s security measures and also trust the host won’t disappear with your money or close down and deny you access.
Software wallets can be installed directly on your computer, giving you private control of your keys. Most have relatively easy configuration and are free. The disadvantage is you are in charge of securing your keys. Software wallets also require greater security precautions. If your computer is hacked or stolen, the thief can get a copy of your wallet and your bitcoin.
While you can download the original software Bitcoin Core protocol (which stores a ledger of all transactions since 2009 and takes up a lot of space), most wallets in use today are “light” wallets, or SPV (Simplified Payment Verification) wallets, which do not download the entire ledger but sync to it.
Electrum is a well-known SPV desktop bitcoin wallet that also offers “cold storage” (a totally offline option for additional security). Exodus can track multiple assets with a sophisticated user interface. Some (such as Jaxx Liberty) can hold a wide range of digital assets, and some (such as Copay) offer the possibility of shared accounts.
Before downloading any app, please confirm you are downloading a legitimate copy of a real wallet. Some shady programmers create clones of various crypto websites and offer downloads for free, leading to the possibility of a hack.
Mobile wallets are available as apps for your smartphone, especially useful if you want to pay for something in bitcoin in a shop or if you want to buy, sell or send while on the move. All of the online wallets and most of the desktop ones mentioned above have mobile versions, while others – such as Abra, Edge and Bread – were created with mobile in mind. Remember, many online wallets will store your keys on the phone itself, leading to the possibility of losing your bitcoin if you lose your phone. Always keep a backup of your keys on a different device and print out your seed phrase.
Hardware wallets are small devices that connect to the web only to enact bitcoin transactions. They are more secure because they are generally offline and therefore not hackable. They can be stolen or lost, however, along with the bitcoins that belong to the stored private keys, so it’s recommended that you backup your keys. Some large investors keep their hardware wallets in secure locations such as bank vaults. Trezor, Keepkey and Ledger are notable examples.
Paper wallets are perhaps the simplest of all the wallets. Paper wallets are pieces of paper that contain the private and public keys of a bitcoin address. Ideal for the long-term storage of bitcoin (away from fire and water, of course) or for the giving of bitcoin as a gift, these wallets are more secure in that they’re not connected to a network. They are, however, easier to lose.
With services such as WalletGenerator, you can easily create a new address and print the wallet on your printer. When you’re ready to top up your paper wallet you simply send some bitcoin to that address and then store it safely. Whatever option you go for, be sure to back up everything and only tell your nearest and dearest where your backups are stored.
submitted by hackatoshi to u/hackatoshi [link] [comments]

Wallets with Coin Control and Trezor support?

I know that Electrum has Coin Control but I don't like the fact that you have to connect to a server that I don't trust like I would trust a server run by Trezor or Blockstream for example. What I mean is that the server will know all my transaction history, addresses, etc, so at least I need to trust the server. I know of Electrum personal server but last time I checked it was too complicated for me. Same with Bitcoin Core.
Then there's Green wallet by Blockstream but I don't think they have Coin Control.
submitted by Bl4ckBoXx to Bitcoin [link] [comments]

How-to: setup your multisignature Cold wallet in Bitcoin Core 0.20 (highest security setup)

Last release of Core is amazing !
The main new feature is sortedmulti descriptor. This allows you to import your multisig setup in Core almost as if it was Electrum when combine to the new PSBT export in GUI !
As it needs command line and some weird checksum, you also need to input very long command in the console and if you made a mistake, you cannot copy the last command you made. So take your time when the commands are long to check everything and don't miss anything, use copy paste before validating the long command. You only have to do this once fortunately :)
I detail here how you do it with a k of n setup, good luck:
And you are DONE ! You should get the exact same addresses than Electrum and you can created receiving addresses in Qt ! To send money, just go to the send section, use the new coin control feature and export a partially signed transaction. You can use HWI or Electrum to sign it with your hardware wallets !
Notice: You can import more or less than 2000 addresses of each type. If less, blockchain rescan is faster but you may need to redo what we have done here later when all addresses will have been used once. If more, it is the contrary.

You now have the most possibly secure setup in one software: multisig with hardware on the full node wallet. When Bitcoin Core 0.21.0 will be out, we will also have native descriptor wallet so maybe we will have HD version of this. But for now, this is the best you can do ! Enjoy :)

P.S. : if you like doing things in one shot you can do the last two steps in one big command: importmulti '[{"desc": "wsh(sortedmulti(k,[path1]xpub1.../0/*,[path2]xpub2.../0/*,...,[pathn]xpubn/0/*))#check_sum0", "timestamp": birth_timestamp, "range": [0,2000], "watchonly": true, "keypool": true}, {"desc": "wsh(sortedmulti(k,[path1]xpub1.../1/*,[path2]xpub2.../1/*,...,[pathn]xpubn/1/*))#check_sum1", "timestamp": birth_timestamp, "range": [0,2000], "watchonly": true, "internal": true}]'
submitted by Pantamis to Bitcoin [link] [comments]

Electrum Part 2 make addresses visible How to Install the Genuine Electrum Bitcoin Wallet (and ... Introduction to Bitcoin: How to send and receive Bitcoin ... How to Find the private key of any blockchain address ... Get Private Keys Of All Bitcoin Address In Electrum Wallet ...

So while choosing a Bitcoin wallet or an exchange service we recommend you to not just check out the fee they charge but also the kind of service they are known for. That way, you will be able to make a pretty informed decision and also get the best deal possible. Electrum too, charges a small fee for Bitcoin transactions and you will be duly notified of the same at this stage. Electrum is one of Bitcoin’s most popular wallets. It uniquely walks the fine line between beginner usability and expert functionality. This guide introduces Electrum with step-by-step examples highlighting the most important beginner features. No previous experience with either Bitcoin or Electrum is needed. Learning Electrum requires practice. This guide will show you how whether you ... Check the address on your hardware wallet by clicking on the little eye icon 👁️ at the bottom right corner to make sure that the address actually belongs to you . Send bitcoin. To send some ... All bitcoin transactions are public so it is a good idea to use a different bitcoin address for every transaction so that it becomes harder for someone to track your activities. OTOH it becomes easier for you to track who sent you how much when you give each sender a different bitcoin address. Because of the above reasons Electrum hands out different receiving addresses each time you go to the ... To receive bitcoin all you need to do is share one of the addresses in your wallet with the person who wants to pay you. With the receive tab Electrum tries to create a workflow for receiving bitcoin that incorporates adding a label to your address, an expected amount and saving all this in the wallet as a receive request.

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Electrum Part 2 make addresses visible

Robert Kiyosaki 2019 - The Speech That Broke The Internet!!! KEEP THEM POOR! - Duration: 10:27. MotivationHub 1,883,782 views get back to us ( [email protected]) Find the private key of Any Blockchain address 2019 latest way, We only communicate Via Email and help many as we can, ... How To Shown All Bitcoin Address in Electrum Wallet. Receiving Bitcoin with Electrum Wallet Click the “Receive” tab on the main Electrum window. Next, to the... This video demonstrates how to get Bitcoin Gold out of Electrum, using an Android app called Coinomi as an extra tool. Bitcoin Gold is a little-known fork of bitcoin that was created on November ... private Keys (Bitcoins, z.B. aus Armory oder Bitcoin Core) in die Electrum Wallet importieren. Forum: https://www.coinforum.de/ Bitcoin kaufen: https://www.b...

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