Creating a P2SH Segwit Wallet with Electrum – Bitcoin Electrum

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Help! I’m trying to send bitcoin from KUCoin exchange and every address my electrum is generating is invalid. I’ve made a legacy and Segwit both don’t work. And also I’m currently not connected and I’ve tried multiple servers. Can anyone help or point me in right direction?

submitted by Lololololinc to Electrum [link] [comments]

I feel like such an idiot 'cause I lost my bitcoins to mSIGNA wallet by using a newly generated invoice address to try and receive the coins. Now the coins wont show and I cant connect to the node to be able to extract them out to electrum. Please help! :(

Update: I managed to send the coins out to electrum with the help of deminero30 setting up a qt node for me to connect to. But my nubiness went and put a very low fee so god knows how long or if the transaction will happen lol.
submitted by CoconutsNeverGiveup to BitcoinBeginners [link] [comments]

12-30 21:33 - 'That's not true. The core has more features than electrum- it just requires use of the CLI. Honestly, you shouldn't be using multi-sig in the first place if you can't figure out how to generate an address using the CLI...' by /u/Nycmdthroaway removed from /r/Bitcoin within 43-53min

'''
That's not true. The core has more features than electrum- it just requires use of the CLI. Honestly, you shouldn't be using multi-sig in the first place if you can't figure out how to generate an address using the CLI.
Open up the debug window CLI tab, type `help' and you'll see how much you can do and the information you can ascertain with the core node that you can't with electrum.
Electrum relies on the core node for all of its functionality, save their proprietary mnemonic seed backup algorithm, which is much less secure than BIP33 (which can be generated with the core; electrum literally provides you with the dictionary to carry out an attack on its addresses, and it doesn't use an EC in its cryptographic process, meaning the encryption entropy is low and the nonces are predictable).
I could order some RIPEMD-160 ASIC chips for $2/piece and have a Chinese fabricator design a PCB using some cheap 22nm SHA-256 chips and the RIPEMD chips, replace cgminer or bfgminer's computational sections with the ultra optimized vanitygen algos for brute forcing priv keys, switch out stratum for JTR-style threaded rainbow tables based on a few hundred thousand rounds of mnemonic generation using electrum's suite- along with some open source code analysis, and in a month I could create a machine that could generate and test hundreds of thousands to millions of mnemonics per second.
The only reason this hasn't been an active practice is because destroying bitcoins keypair-cryptography (or at least appearing to have done so) would send the price under a dollar in 24hours. An update would be patched within a few days and it should be a lot of hard work for nothing. But I wouldn't be surprised if this is occurring actively on a small scale, with old addresses presumed to be "lost." Even if an active address was hit, as long as it wasn't overdone, people would shrug it off as a physical compromise of their own network/machine/software, not an epidemic- but considering the frequency of exchanges getting "hacked" and the actual ease by which the attack could be carried out, I think there's an equal possibility that the security is already completely compromised.
Theoretically all mnemonic backups are inherently insecure (as is any password using dictionary words, no matter how long) but at least using ECDHE and a deterministic seed, you're actually getting a password with a strength equal to that of the sum of its characters as ASCI to BASE/56 encoded bits. Without that, you may as well have a 12 character passphrase (with the possible characters equal to the number of words in the abridged electrum dictionary.) So it's {POSSIBLE WORDS}12 for electrum vs. something closer to {(POSSIBLE WORDS60)(POSSIBLE HD-SEEDS)}256 for a BIP33 mnemonic using SecP256k ECDHE algo (assuming average number of letters in a word are 5 and HD seeds are pseudo-random.) But mnemonic seeds are still insecure even with BIP33. Use the core wallet and you get a key with true randomness using entropy from blockchain derived sources, 2 rounds of SHA-256 and a final RIPEMD-160 round with a 256-Bit secret generated in conjunction with with an extremely secure ECDHE curve=trillions upon trillions of possibilities. That not only makes a single key harder to break, it means there is a much less likely chance of someone randomly guessing secrets and testing them to see if they come out to a funded address in the whole scheme of things.
It's like if I tried to break into every Dell server. If many people were using weak passwords, and I could try a password on all of them at the same time- I'd surely crack a bunch, and make Dell look bad as a company, even though the servers were inherently fine. Keeping the network strong means making sure you do your part to save face, after all bitcoin is owned and CONTROLLED by the userbase.
As a side note, RIPEMD was only used in the public scheme along with SHA256 (despite being significantly weaker) because at the time SHA256 was the only widely implemented and highly secure algorithm- meaning it could be as widely adopted and widely mined as possible. So SHA-256 was the logical choice for the main block algorithm. There wasn't another option for the wallet address' scheme that would be secure tunneling enough and still computationally feasible and easy to integrate. So SHA-256 was most secure, but without the round of RIPEMD-160 as the deterministic round, wallets could be brute forced at the same time as mining, with the same hardware.
For the most secure, fool-proof, uncrackable wallet, here's what I do/used to do: Use the Core node to bake Segwit P2SH addresses. I don't use HD wallets period, but HD is secure enough as long as you're using a truly random secret. Remember that the secret in a BIP33 HD wallet is the master privkey, additionally, each address has it's own xpriv, which, considering the combinations possible, saving the individual xprivs makes the most sense anyway. If you plan on spending the coins soon, just secure the wallet .dat file with a strong 16+ character (A-Z,a-z,()$&@#$/?¿%÷,0-9) passphrase (this is just the wallet file pw it has nothing to do with your addresses) then just throw the wallet on a flash drive or better yet an SD card or 2 and call it a day.
For addresses you plan to put on ice for a while, concat your coins into a handful of accounts, don't store more than $1,000/address. Then using the `dumpprivkey' Core CLI command (I think that's the command, it's something like that, type help and you'll see it if I'm wrong), a text encrypting program (for good measure) and a barcode/QR code generator (all offline!), get the private keys for each address, encrypt the text with an easy to remember password (you'll be taking the keys offline, and storing physically, so no need to worry too much about that pass, it's better to just keep them physically safe), and then generate QR codes for each. Paste them all into a word doc with the corresponding (lightly) encrypted numbers you generated the QRs with. Print out a couple copies and then delete the addresses from the wallet.
Put those paper wallets somewhere safe. You could also split the key down the middle and store the 2 parts of the paper wallets in different places instead of encrypting the plaintext xprivs. So you'd need to scan both paper keys and paste the solutions together to access the coins.
That's all a bit extreme... in reality, unless you're super paranoid and storing millions, you'll be fine by keeping your coins in the core node with decent firewall and a good .dat passphrase.
BUT ELECTRUM IS NO GOOD!
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Author: Nycmdthroaway
submitted by removalbot to removalbot [link] [comments]

How to generate more change addresses manually in Electrum? [2mBTC bounty] /r/Bitcoin

How to generate more change addresses manually in Electrum? [2mBTC bounty] /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Which is safer? Reusing old offline addresses, or using new addresses automatically generated by Electrum on an online computer? /r/Bitcoin

Which is safer? Reusing old offline addresses, or using new addresses automatically generated by Electrum on an online computer? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

How does Electrum 3 generate SegWit addresses? /r/Bitcoin

How does Electrum 3 generate SegWit addresses? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

08-23 23:02 - 'How to generate a multiple recieve addresses in Electrum wallet' (self.Bitcoin) by /u/coinstreak removed from /r/Bitcoin within 0-6min

'''
Hello, I remember that there were a multiple recieve addresses shown in electrum wallet 1-2 years ago, but now I have 2.7.9 version and there is just a single recieve address. How can I generate more recieve addresses? Thanks for heping!
'''
How to generate a multiple recieve addresses in Electrum wallet
Go1dfish undelete link
unreddit undelete link
Author: coinstreak
submitted by removalbot to removalbot [link] [comments]

How to generate a multiple recieve addresses in Electrum wallet /r/Bitcoin

How to generate a multiple recieve addresses in Electrum wallet /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Electrum (it generates new addresses) - are they mine forever? /r/Bitcoin

Electrum (it generates new addresses) - are they mine forever? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

A question about Electrum address generation. /r/Bitcoin

A question about Electrum address generation. /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]

Tool for creating QR codes for my business invoices?

I run a civil engineering business in the US, and have been including a note on my invoices that I accept crypto and there's a 10% discount if they pay in crypto. Unsurprisingly, I've had no takers (since 2013!) I'm thinking maybe it'd be a good idea to include a QR code on each invoice, a payment QR code to a wallet, in the amount of 10% less than the invoice. The QR code would provide visibility (no one reads fine print) and if someone scans it it would take them to the edge of the crypto rabbit hole.
Is there a good tool for doing this? I imagine the wallet for the code would have to be a BTC wallet, but if they called me and wanted to pay in some other currency, I could set it up. The tool would need to run on PC, since I create my invoices in Excel.
submitted by Spirited_Passenger to Bitcoin [link] [comments]

Had a bad day yesterday!

I got my first bitcoin payment yesterday of about $172 and the funds were stolen immediately. I have never shared my private Keys and I always use blockchain.com wallet. Any advice is highly appreciated.
submitted by futurebrought to Bitcoin [link] [comments]

If I was to buy bitcoin through Coinbase, how do I then send that to an offline wallet? And how would I then be able to sell that in the future?

submitted by becauseiwas-inverted to Bitcoin [link] [comments]

How are my Bitcoin transactions linked to me?

I don't mean in terms of privacy, which all my web searches seem to assume. But rather, if I set up a new wallet from an existing seed, how does that wallet know what transactions have sent me Bitcoin, and vice versa?
submitted by Ragnar_The_Fearless to Bitcoin [link] [comments]

Trezor recovery

Dear
Im new to Trezor. I don't fully understand two thinks:
  1. I have trezor recovery seed - I guess 24 words. How is possible to recover all wallets in trezor with only this one passphrase? Because btc has own, eth own etc...
  2. Imagine that gowerment or anybody else will turn off web page trezor.io. How can I access my BTC saved in trezor if there will be no access to trezor.io web page but BTC blockchain will be working.
submitted by Glad_Size1766 to TREZOR [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.
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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]

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]

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]

Algorithm for starting to accept payments in BTC?

I'm a developer and run a full node of Bitcoin.
I have several shops where I plan to start accepting bitcoin payments. The volume I invision in the beginning would be rather small.
(1) What'd be a simple algorithm for how to get started with it?
Would I have to generate (N of shops * 100) addresses first? And then map each of 100 to a shop? And then at checkout give a user one of those addresses and then watch when the 1st confirmation arrives, by doing poll requests from my shop to my full node server, remotely, via RPC?

(2) Also, how would I actually properly create a wallet for this? I'll need that wallet to be watch-only.
(3) Would I be able to somehow connect my Electrum client-wallet to that bitcoin watch-only wallet so that I could see how much of bitcoins there're in it, from my laptop in a more convenient manner?

---
I don't consider third-party solutions such as BTC server or Electrum server. I use Electrum as a wallet only, on desktop.
submitted by artjuna_0900 to btc [link] [comments]

Are all bitcoin wallets stored somewhere on a server?

Please excuse my ignorance I’m very new to this, but I understand you can recover wallets anywhere with your seed. Such as if I have an electrum wallet and I buy a ledger nano s, I can put my seed into my ledger and then now my electrum wallet is on my ledger.
Wouldn’t all wallets details have to be stored somewhere online to be able to access them like this?
submitted by Dtoks to BitcoinBeginners [link] [comments]

How to perform strong verification of multisig receive addresses and limit trust in software wallets?

Example scenario: you've set up a 2-of-3 multisig watch only wallet in Electrum or some other desktop wallet, and you use it to generate receive addresses. How do you protect yourself from maliciously generated receive addresses for this wallet, in the case that the desktop software is compromised? How do you validate that the receive addresses are correct and not an attacker's receive address? how do you limit trust of the desktop software wallet?
With typical single-sig P2PKH and P2WPKH the receive addresses can be independently verified to belong to a known xpub key using any bitcoin software library and a small script. Hardware wallets can also be used to generate or verify receive addresses so the software wallet doesn't not need to be trusted. Some hardware wallets also verify the change address for a given transaction also belongs to the xpub key in question.
So how do you do this kind of verification for multisig wallets? Or are people not verifying and instead just trusting that their software wallet of choice is not compromised? I haven't found examples online to do this. It appears that in the Coldcard multisig set up process for a 2-of-3 setup, each device is aware of the other 2 xpubs, so presumably it has the information to perform this kind of verification, but I don't know if it actually does that verification.
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