Anonymous Bitcoin Wallet: How to Exchange Bitcoins Anonymously

Alright guys this is it... electrum personal server, Lightning and bitcoin wallet on same headless raspi... if someone needs DIY help msg me or want to buy similar custom made raspi let me know...

Alright guys this is it... electrum personal server, Lightning and bitcoin wallet on same headless raspi... if someone needs DIY help msg me or want to buy similar custom made raspi let me know... submitted by Cryptoguruboss to Bitcoin [link] [comments]

Help wanted: importing private keys from blockchain.info into Electrum /r/Bitcoin

Help wanted: importing private keys from blockchain.info into Electrum /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Please someone help. I have bitcoin in my electrum wallet and want to change it to USD, but I'm unable to access my coinbase account because my phone number changed. How can I quickly and easily convert my bitcoin to USD?? /r/Bitcoin

Please someone help. I have bitcoin in my electrum wallet and want to change it to USD, but I'm unable to access my coinbase account because my phone number changed. How can I quickly and easily convert my bitcoin to USD?? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Please help, i want to transfer 80 btc from electrum wallet, how long does it take for my transaction to arrive, is it still hours/days? And how much fee should i insert? /r/Bitcoin

Please help, i want to transfer 80 btc from electrum wallet, how long does it take for my transaction to arrive, is it still hours/days? And how much fee should i insert? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [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]

Reminder from previous bull markets

Usually, bull markets attract a lot of new investors - although speculators should be the right word here - and as usual, a lot of them are going to be crushed a way or another.
First, before putting a single dollar, euro or whatever in the market, you should read a lot to know exactly what you're looking for.
Are you here for the tech and/or the cypherpunk ethos ? Great, there's lot of resources out there (my links are cleaned but as always, do your due diligence) :
Now, you've read and you want to put some skin in the game. Several exchanges are acceptable, a lot of aren't, be careful and assume that none really are (know that I won't post any ref links) :
This was for centralized exchanges aka CEX. Talking about custodial, you'll need wallets to store your (bit)coins. Always try to use non-custodial wallets, which means wallets that give you your private keys. This way, if the software goes down, you can always retreive your money. Now, I won't link to all the existing wallets but will advise you to buy hardware wallets (trezor or ledger but there are others) or to create (on off-gap computers) paper wallets you're able to store safely (against all risks, not only robbery but housefire). You also could use your memory with brain wallets but, my gosh, I wouldn't trust myself. For Bitcoin (or even Litecoin), Electrum software can do a good job (but save your keys).
AGAIN, DON'T KEEP YOUR SAVINGS ON AN EXCHANGE
Now, about trading : it's been repeated and repeated but don't chase pumps and altcoins. Yep, it's probably the fastest way to make money. It's also the fastest to lose it. I won't lie : I made good money during the 2017-bullrun and I took profits but I also forgot to sell some shitcoins thinking it would keep going up, now I'm still holding these bags (although I don't really care). I know that a lot forgot to take profits. Take profits, always take profits, whatever your strategy is. Don't fall for people trying to sell you their bags, for ICOs trying to sell you a product which isn't released yet and obviously, don't fall for people asking for your private key.
Also, know that there's two endgames : accumulating bitcoin or fiat. I'm rather in the first team but whatever your strategy is, take profits. (Yes, I know, some will say accumulating ethereum or something else). It's true that a lot of ethereum holders made a lot of money during the last bullrun (ethereum helped me make money too) but I'm really biased in favor of bitcoin (and monero). So, pick your coin but again, do your due diligence.
A lot of people here or there will talk about the best tech, the fact that bitcoin is old and slow. I would need another post to go further on this point but know that a lof of air flight systems are old too but reliable. Trustless and reliable is the point here.
This is the post from someone who bought bitcoin seven or six years ago, who lost part of them, who spent part of them (but don't regret this at all), who is still learning and I hope it will help others, although it would need a book to be complete.
submitted by EmmanuelBlockchain to CryptoCurrency [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]

XMR.CO is a SCAM!

UPDATE: The money has been returned as of today, 10/15/2020. Not all of it mind you, I assume there were some transfer fees, and it was returned in BTC, not the Monero I was trying to exchange for. It took several emails where I had to be on top of them, asking why I had not got a response in over a week. So xmr.co may NOT be a scam, but at the very least this has been very questionable service.
A couple weeks ago I initiated an exchange for transferring some of BTC to XMR with XMR.CO. I had heard from several places that they were a reputable exchange, so I decided to try it. I sent almost $100 in BTC which took a couple hours to confirm. I provided them with a valid XMR wallet and a valid BTC refund address. No status updated on the exchange page, and no money was ever transferred to my wallet. Naturally I emailed their support [[email protected]](mailto:[email protected]) and got an automated response that they had received my inquiry. I don't include the original exchange ID on here for obvious reasons.
hello, I did an exchange on your website and sent over bitcoin and i have not received anything. I see there is over 25 confirmations now in my electrum walltet and the status on my exchange hasn't changed. What is going on?
and they never sent me an actual email. I tried responding to the automated email they sent me, and sending them a message on wickr as they state as an alternative way to contact them. I have still not got an answer as to why I am missing nearly $100. This is very frustrating, cause I don't see anything else on here stating that xmr is a scam, so I want to make sure everyone knows, so no one else gets scammed like I did.
UPDATE: Except they gave the money back, so it might not be a scam. But I'm not using them again.
submitted by SolidarityFurever to Monero [link] [comments]

"My transaction is stuck, what to do?" - an explainer [DRAFT]

In the last days we have been experiencing a sharp rise in price, which is historically correlated with many people transacting over the Bitcoin network. Many people transacting over the Bitcoin network implies that the blockspace is in popular demand, meaning that when you send a transaction, it has to compete with other transactions for the inclusion in one of the blocks in the future. Miners are motivated by profits and transactions that pay more than other transactions are preferred when mining a new block. Although the network is working as intended (blockspace is a scarce good, subject to supply/demand dynamics, regulated purely by fees), people who are unfamiliar with it might feel worried that their transaction is “stuck” or otherwise somehow lost or “in limbo”. This post attempts to explain how the mempool works, how to optimize fees and that one does not need to worry about their funds.

TL;DR: Your funds are safe. Just be patient* and it'll be confirmed at some point. A transaction either will be confirmed or it never leaves your wallet, so there is nothing to worry about in regards to the safety of your coins.

You can see how the mempool "ebbs and flows", and lower fee tx's get confirmed in the "ebb" times (weekends, nights): https://jochen-hoenicke.de/queue/#0,30d
* if you are in hurry there are things like RBF (Replace By Fee) and CPFC (Child Pays For Parent), which you can use to boost your transaction fees; you will need an advanced wallet like Bitcoin Core or Electrum for that though. Keep also in mind that this is not possible with any transaction (RBF requires opt in before sending, f.ex). If nothing else works and your transaction really needs a soon confirmation, you can try and contact a mining pool to ask them if they would include your transaction. Some mining pools even offer a web-interface for this: 1, 2.
Here’s how Andreas Antonopoulos describes it:
In bitcoin there is no "in transit". Transactions are atomic meaning they either happen all at once or don't happen at all. There is no situation where they "leave" one wallet and are not simultaneously and instantaneously in the destination address. Either the transaction happened or it didn't. The only time you can't see the funds is if your wallet is hiding them because it is tracking a pending transaction and doesn't want you to try and spend funds that are already being spent in another transaction. It doesn't mean the money is in limbo, it's just your wallet waiting to see the outcome. If that is the case, you just wait. Eventually the transaction will either happen or will be deleted by the network.
tl;dr: your funds are safe

How is the speed of confirmations determined in bitcoin?

Open this site: https://jochen-hoenicke.de/queue/#0,2w
Here you see how many transactions are currently (and were historically) waiting to be confirmed, i.e how many transactions are currently competing with your transaction for blockspace (=confirmation).
You can see two important things: the differently coloured layers, each layer representing a different fee (higher layer = higher fees). You can point at a layer and see which fees (expressed in sat/byte) are represented in this layer. You can then deduct which layer your own transaction is currently at, and how far away from the top your position is (miners work through the mempool always from the top, simply because the tx's on top pay them more). You can estimate that each newly mined block removes roughly 1.xMB from the top (see the third graph which shows the mempool size in MB). On average, a new block is produced every ten minutes. But keep in mind that over time more transactions come into the mempool, so there can be periods where transactions are coming faster than transactions being “processed” by miners.
The second important observation is that the mempool "ebbs and flows", so even the lower paid transactions are periodically being confirmed at some point.
In short: what determines the speed of a confirmation is A) how high you set the fees (in sat/byte), B) how many other transactions with same or higher fees are currently competing with yours and C) how many transactions with higher paid fees will be broadcast after yours.
A) you can influence directly, B) you can observe in real time, but C) is difficult to predict. So it's always a little tricky to tell when the first confirmation happens if you set your fees low. But it's quite certain that at some point even the cheap transactions will come through.

So what happens if my transaction stays unconfirmed for days or even weeks?

Transactions are being broadcast by the full nodes on the network. Each node can adjust their settings for how long they keep unconfirmed transactions in their mempool. That’s why there is not a fixed amount of time after which a transaction is dropped from the mempool, but most nodes drop unconfirmed tx’s after two weeks [IS THIS CORRECT?]. This means that in the absolute worst case the unconfirmed transaction will simply disappear from the network, as if it never happened. Keep in mind that in those two weeks the coins never actually leave your wallet. It’s just that your wallet doesn’t show them as “available”, but you still have options like RBF and CPFP to get your transaction confirmed with higher fees, or to “cancel” your transaction by spending the same coins onto another address with a higher fee.

Helpful tools to estimate fees for future transactions:

Here are some resources that can help you estimate fees when sending a bitcoin transaction, so you don't end up overpaying (or underpaying) unnecessarily. Keep in mind that in order to take advantage of this, you need a proper bitcoin wallet which allows for custom fee setting. A selection of such wallets you can find here or here.
The order here is roughly from advanced to easy.
1) https://jochen-hoenicke.de/queue/#0,24h
Here you can see a visualization of how many unconfirmed transactions are currently on the network, as well as how many were there in the past. Each coloured layer represents a different fee amount. F.ex the deep blue (lowest layer) are the 1sat/byte transactions, slightly brighter level above are the 2sat/byte transactions and so on.
The most interesting graph is the third one, which shows you the size of the current mempool in MB and the amount of transactions with different fee levels, which would compete with your transaction if you were to send it right now. This should help you estimating how high you need to set the fee (in sat/byte) in order to have it confirmed "soon". But this also should help you to see that even the 1sat/byte transactions get confirmed very regularly, especially on weekends and in the night periods, and that the spikes in the mempool are always temporary. For that you can switch to higher timeframes in the upper right corner, f.ex here is a 30 days view: https://jochen-hoenicke.de/queue/#0,30d. You clearly can see that the mempool is cyclical and you can set a very low fee if you are not in hurry.
2) https://mempool.space
This is also an overview of the current mempool status, although less visual than the previous one. It shows you some important stats, like the mempool size, some basic stats of the recent blocks (tx fees, size etc). Most importantly, it makes a projection of how large you need to set your fees in sat/byte if you want your transaction to be included in the next block, or within the next two/three/four blocks. You can see this projection in the left upper corner (the blocks coloured in brown).
3) https://whatthefee.io
This is a simple estimation tool. It shows you the likelihood (in %) of a particular fee size (in sat/byte) to be confirmed within a particular timeframe (measured in hours). It is very simple to use, but the disadvantage is that it shows you estimates only for the next 24 hours. You probably will overpay by this method if your transaction is less time sensitive than that.
4) https://twitter.com/CoreFeeHelper
This is a very simple bot that tweets out fees projections every hour or so. It tells you how you need to set the fees in order to be confirmed within 1hou6hours/12hours/1day/3days/1week. Very simple to use.
Hopefully one of these tools will help you save fees for your next bitcoin transaction. Or at least help you understand that even with a very low fee setting your transaction will be confirmed sooner or later. Furthermore, I hope it makes you understand how important it is to use a wallet that allows you to set your own fees.
submitted by TheGreatMuffin to u/TheGreatMuffin [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]

Versus Project Multisig help please.

Hi All, apologies for noobishness but I could really do with a bit of help here. Normally, I like to figure stuff out by myself but I can't make head nor tail of the below instructions on the versus project multisig set up. Please see below for copypasta direct from their website:
-> You'll need the following digital items: -> Electrum Wallet (there are other wallets you can use, but for the sake of keep things streamlined we will recommend Electrum because we know it works for these purposes) -> A fresh standard (not multisig!) electrum wallet ONLY used for Versus Market -> Coinb.in for signing (we will explain this later) -> Bitcoin Public Key used for the transaction (provided by Versus on the order details) -> Bitcoin Private Key matching the public key used for the transaction
II. "Wow, that seems like a lot. Are you sure this isn't complicated?" -> We're sure. :)
III. "Alright, what next?" -> First you will want to set up your Electrum Wallet and identify the first Public Key derived from your xpub and the matching Private Key. You can get the private key by right clciking on the public key and select 'Show private key'. -> Please note, we strongly recommend creating a backup of your Electrum wallet on a separate USB. -> You will need to enter your Bitcoin Private Key into Coinb.in. Remember to download the coinb.in script and use it localy instead of online to sign a transaction!
IV. "I am being told I need to Sign a Bitcoin Transaction, what do I do now?" -> Copy the bitcoin transaction and head on over to Coinbin. -> At Coinbin, go to "SIGN" and paste the transaction code on the lower text fiels. -> You will then need to enter your bitcoin PRIVATE key (which you can easily get from your electrum wallet) on the upper field. -> Click Submit to Sign the transaction. Copy the result back to Versus Market and broadcast the transaction to finish your setup!
V. "Okay, I think I set everything up. Now that I am no longer using traditional escrow, how do I finalize an order so my vendor gets his or her payment?" -> This is very simple. All you need to do is to sign the transaction to release the funds. -> Just like before, copy the Multi Sig transaction from Versus into Coinbin and "SIGN." -> Copy the matching private key to your public key and hit "Submit."
So far I have set up my electrum wallet and located my master public key which I have added to their site to enable multisig (this again was not clear but I worked that out). My stumbling block comes when I'm expected to locate a matching private key, how do I know which one is the matching one? Right clicking on the master public key does nothing so how am I supposed to match anything?
It also asks to submit your private key to something called coinb.in - is this safe? I was under the impression that you should not reveal private keys to anyone at any time. If it is where can I download the coinb.in script from?
Thanks in advance for any help. They seem to have done away with the escrow system they used to use because of their recent hack and I just can't get my head around this.
submitted by coveredinyourpoop to darknet [link] [comments]

Syscoin Platform’s Great Reddit Scaling Bake-off Proposal

Syscoin Platform’s Great Reddit Scaling Bake-off Proposal

https://preview.redd.it/rqt2dldyg8e51.jpg?width=1044&format=pjpg&auto=webp&s=777ae9d4fbbb54c3540682b72700fc4ba3de0a44
We are excited to participate and present Syscoin Platform's ideal characteristics and capabilities towards a well-rounded Reddit Community Points solution!
Our scaling solution for Reddit Community Points involves 2-way peg interoperability with Ethereum. This will provide a scalable token layer built specifically for speed and high volumes of simple value transfers at a very low cost, while providing sovereign ownership and onchain finality.
Token transfers scale by taking advantage of a globally sorting mempool that provides for probabilistically secure assumptions of “as good as settled”. The opportunity here for token receivers is to have an app-layer interactivity on the speed/security tradeoff (99.9999% assurance within 10 seconds). We call this Z-DAG, and it achieves high-throughput across a mesh network topology presently composed of about 2,000 geographically dispersed full-nodes. Similar to Bitcoin, however, these nodes are incentivized to run full-nodes for the benefit of network security, through a bonded validator scheme. These nodes do not participate in the consensus of transactions or block validation any differently than other nodes and therefore do not degrade the security model of Bitcoin’s validate first then trust, across every node. Each token transfer settles on-chain. The protocol follows Bitcoin core policies so it has adequate code coverage and protocol hardening to be qualified as production quality software. It shares a significant portion of Bitcoin’s own hashpower through merged-mining.
This platform as a whole can serve token microtransactions, larger settlements, and store-of-value in an ideal fashion, providing probabilistic scalability whilst remaining decentralized according to Bitcoin design. It is accessible to ERC-20 via a permissionless and trust-minimized bridge that works in both directions. The bridge and token platform are currently available on the Syscoin mainnet. This has been gaining recent attention for use by loyalty point programs and stablecoins such as Binance USD.

Solutions

Syscoin Foundation identified a few paths for Reddit to leverage this infrastructure, each with trade-offs. The first provides the most cost-savings and scaling benefits at some sacrifice of token autonomy. The second offers more preservation of autonomy with a more narrow scope of cost savings than the first option, but savings even so. The third introduces more complexity than the previous two yet provides the most overall benefits. We consider the third as most viable as it enables Reddit to benefit even while retaining existing smart contract functionality. We will focus on the third option, and include the first two for good measure.
  1. Distribution, burns and user-to-user transfers of Reddit Points are entirely carried out on the Syscoin network. This full-on approach to utilizing the Syscoin network provides the most scalability and transaction cost benefits of these scenarios. The tradeoff here is distribution and subscription handling likely migrating away from smart contracts into the application layer.
  2. The Reddit Community Points ecosystem can continue to use existing smart contracts as they are used today on the Ethereum mainchain. Users migrate a portion of their tokens to Syscoin, the scaling network, to gain much lower fees, scalability, and a proven base layer, without sacrificing sovereign ownership. They would use Syscoin for user-to-user transfers. Tips redeemable in ten seconds or less, a high-throughput relay network, and onchain settlement at a block target of 60 seconds.
  3. Integration between Matic Network and Syscoin Platform - similar to Syscoin’s current integration with Ethereum - will provide Reddit Community Points with EVM scalability (including the Memberships ERC777 operator) on the Matic side, and performant simple value transfers, robust decentralized security, and sovereign store-of-value on the Syscoin side. It’s “the best of both worlds”. The trade-off is more complex interoperability.

Syscoin + Matic Integration

Matic and Blockchain Foundry Inc, the public company formed by the founders of Syscoin, recently entered a partnership for joint research and business development initiatives. This is ideal for all parties as Matic Network and Syscoin Platform provide complementary utility. Syscoin offers characteristics for sovereign ownership and security based on Bitcoin’s time-tested model, and shares a significant portion of Bitcoin’s own hashpower. Syscoin’s focus is on secure and scalable simple value transfers, trust-minimized interoperability, and opt-in regulatory compliance for tokenized assets rather than scalability for smart contract execution. On the other hand, Matic Network can provide scalable EVM for smart contract execution. Reddit Community Points can benefit from both.
Syscoin + Matic integration is actively being explored by both teams, as it is helpful to Reddit, Ethereum, and the industry as a whole.

Proving Performance & Cost Savings

Our POC focuses on 100,000 on-chain settlements of token transfers on the Syscoin Core blockchain. Transfers and burns perform equally with Syscoin. For POCs related to smart contracts (subscriptions, etc), refer to the Matic Network proposal.
On-chain settlement of 100k transactions was accomplished within roughly twelve minutes, well-exceeding Reddit’s expectation of five days. This was performed using six full-nodes operating on compute-optimized AWS c4.2xlarge instances which were geographically distributed (Virginia, London, Sao Paulo Brazil, Oregon, Singapore, Germany). A higher quantity of settlements could be reached within the same time-frame with more broadcasting nodes involved, or using hosts with more resources for faster execution of the process.
Addresses used: 100,014
The demonstration was executed using this tool. The results can be seen in the following blocks:
612722: https://sys1.bcfn.ca/block/6d47796d043bb4c508d29123e6ae81b051f5e0aaef849f253c8f3a6942a022ce
612723: https://sys1.bcfn.ca/block/8e2077f743461b90f80b4bef502f564933a8e04de97972901f3d65cfadcf1faf
612724: https://sys1.bcfn.ca/block/205436d25b1b499fce44c29567c5c807beaca915b83cc9f3c35b0d76dbb11f6e
612725: https://sys1.bcfn.ca/block/776d1b1a0f90f655a6bbdf559ff5072459cbdc5682d7615ff4b78c00babdc237
612726: https://sys1.bcfn.ca/block/de4df0994253742a1ac8ac9eec8d2a8c8b0a6d72c53d6f3caa29bb6c171b0a6b
612727: https://sys1.bcfn.ca/block/e5e167c52a9decb313fbaadf49a5e34cb490f8084f642a850385476d4ef10d70
612728: https://sys1.bcfn.ca/block/ab64d989edc71890e7b5b8491c20e9a27520dc45a5f7c776d3dae79057f59fe7
612729: https://sys1.bcfn.ca/block/5e8b7ecd0e36f99d07e4ea6e135fc952bf7ec30164ab6f4d1e98b0f2d405df6d
612730: https://sys1.bcfn.ca/block/d395df3d31dde60bbb0bece6bd5b358297da878f0beb96be389e5f0e043580a3
It is important to note that this POC is not focused on Z-DAG. The performance of Z-DAG has been benchmarked within realistic network conditions: Whiteblock’s audit is publicly available. Network latency tests showed an average TPS around 15k with burst capacity up to 61k. Zero-latency control group exhibited ~150k TPS. Mainnet testing of the Z-DAG network is achievable and will require further coordination and additional resources.
Even further optimizations are expected in the upcoming Syscoin Core release which will implement a UTXO model for our token layer bringing further efficiency as well as open the door to additional scaling technology currently under research by our team and academic partners. At present our token layer is account-based, similar to Ethereum. Opt-in compliance structures will also be introduced soon which will offer some positive performance characteristics as well. It makes the most sense to implement these optimizations before performing another benchmark for Z-DAG, especially on the mainnet considering the resources required to stress-test this network.

Cost Savings

Total cost for these 100k transactions: $0.63 USD
See the live fee comparison for savings estimation between transactions on Ethereum and Syscoin. Below is a snapshot at time of writing:
ETH price: $318.55 ETH gas price: 55.00 Gwei ($0.37)
Syscoin price: $0.11
Snapshot of live fee comparison chart
Z-DAG provides a more efficient fee-market. A typical Z-DAG transaction costs 0.0000582 SYS. Tokens can be safely redeemed/re-spent within seconds or allowed to settle on-chain beforehand. The costs should remain about this low for microtransactions.
Syscoin will achieve further reduction of fees and even greater scalability with offchain payment channels for assets, with Z-DAG as a resilience fallback. New payment channel technology is one of the topics under research by the Syscoin development team with our academic partners at TU Delft. In line with the calculation in the Lightning Networks white paper, payment channels using assets with Syscoin Core will bring theoretical capacity for each person on Earth (7.8 billion) to have five on-chain transactions per year, per person, without requiring anyone to enter a fee market (aka “wait for a block”). This exceeds the minimum LN expectation of two transactions per person, per year; one to exist on-chain and one to settle aggregated value.

Tools, Infrastructure & Documentation

Syscoin Bridge

Mainnet Demonstration of Syscoin Bridge with the Basic Attention Token ERC-20
A two-way blockchain interoperability system that uses Simple Payment Verification to enable:
  • Any Standard ERC-20 token to be moved from Ethereum to the Syscoin blockchain as a Syscoin Platform Token (SPT), and back to Ethereum
  • Any SPT to be moved from Syscoin to the Ethereum blockchain as an ERC-20 token, and back to Syscoin

Benefits

  • Permissionless
  • No counterparties involved
  • No trading mechanisms involved
  • No third-party liquidity providers required
  • Cross-chain Fractional Supply - 2-way peg - Token supply maintained globally
  • ERC-20s gain vastly improved transactionality with the Syscoin Token Platform, along with the security of bitcoin-core-compliant PoW.
  • SPTs gain access to all the tooling, applications and capabilities of Ethereum for ERC-20, including smart contracts.
https://preview.redd.it/l8t2m8ldh8e51.png?width=1180&format=png&auto=webp&s=b0a955a0181746dc79aff718bd0bf607d3c3aa23
https://preview.redd.it/26htnxzfh8e51.png?width=1180&format=png&auto=webp&s=d0383d3c2ee836c9f60b57eca35542e9545f741d

Source code

https://github.com/syscoin/?q=sysethereum
Main Subprojects

API

Tools to simplify using Syscoin Bridge as a service with dapps and wallets will be released some time after implementation of Syscoin Core 4.2. These will be based upon the same processes which are automated in the current live Sysethereum Dapp that is functioning with the Syscoin mainnet.

Documentation

Syscoin Bridge & How it Works (description and process flow)
Superblock Validation Battles
HOWTO: Provision the Bridge for your ERC-20
HOWTO: Setup an Agent
Developer & User Diligence

Trade-off

The Syscoin Ethereum Bridge is secured by Agent nodes participating in a decentralized and incentivized model that involves roles of Superblock challengers and submitters. This model is open to participation. The benefits here are trust-minimization, permissionless-ness, and potentially less legal/regulatory red-tape than interop mechanisms that involve liquidity providers and/or trading mechanisms.
The trade-off is that due to the decentralized nature there are cross-chain settlement times of one hour to cross from Ethereum to Syscoin, and three hours to cross from Syscoin to Ethereum. We are exploring ways to reduce this time while maintaining decentralization via zkp. Even so, an “instant bridge” experience could be provided by means of a third-party liquidity mechanism. That option exists but is not required for bridge functionality today. Typically bridges are used with batch value, not with high frequencies of smaller values, and generally it is advantageous to keep some value on both chains for maximum availability of utility. Even so, the cross-chain settlement time is good to mention here.

Cost

Ethereum -> Syscoin: Matic or Ethereum transaction fee for bridge contract interaction, negligible Syscoin transaction fee for minting tokens
Syscoin -> Ethereum: Negligible Syscoin transaction fee for burning tokens, 0.01% transaction fee paid to Bridge Agent in the form of the ERC-20, Matic or Ethereum transaction fee for contract interaction.

Z-DAG

Zero-Confirmation Directed Acyclic Graph is an instant settlement protocol that is used as a complementary system to proof-of-work (PoW) in the confirmation of Syscoin service transactions. In essence, a Z-DAG is simply a directed acyclic graph (DAG) where validating nodes verify the sequential ordering of transactions that are received in their memory pools. Z-DAG is used by the validating nodes across the network to ensure that there is absolute consensus on the ordering of transactions and no balances are overflowed (no double-spends).

Benefits

  • Unique fee-market that is more efficient for microtransaction redemption and settlement
  • Uses decentralized means to enable tokens with value transfer scalability that is comparable or exceeds that of credit card networks
  • Provides high throughput and secure fulfillment even if blocks are full
  • Probabilistic and interactive
  • 99.9999% security assurance within 10 seconds
  • Can serve payment channels as a resilience fallback that is faster and lower-cost than falling-back directly to a blockchain
  • Each Z-DAG transaction also settles onchain through Syscoin Core at 60-second block target using SHA-256 Proof of Work consensus
https://preview.redd.it/pgbx84jih8e51.png?width=1614&format=png&auto=webp&s=5f631d42a33dc698365eb8dd184b6d442def6640

Source code

https://github.com/syscoin/syscoin

API

Syscoin-js provides tooling for all Syscoin Core RPCs including interactivity with Z-DAG.

Documentation

Z-DAG White Paper
Useful read: An in-depth Z-DAG discussion between Syscoin Core developer Jag Sidhu and Brave Software Research Engineer Gonçalo Pestana

Trade-off

Z-DAG enables the ideal speed/security tradeoff to be determined per use-case in the application layer. It minimizes the sacrifice required to accept and redeem fast transfers/payments while providing more-than-ample security for microtransactions. This is supported on the premise that a Reddit user receiving points does need security yet generally doesn’t want nor need to wait for the same level of security as a nation-state settling an international trade debt. In any case, each Z-DAG transaction settles onchain at a block target of 60 seconds.

Syscoin Specs

Syscoin 3.0 White Paper
(4.0 white paper is pending. For improved scalability and less blockchain bloat, some features of v3 no longer exist in current v4: Specifically Marketplace Offers, Aliases, Escrow, Certificates, Pruning, Encrypted Messaging)
  • 16MB block bandwidth per minute assuming segwit witness carrying transactions, and transactions ~200 bytes on average
  • SHA256 merge mined with Bitcoin
  • UTXO asset layer, with base Syscoin layer sharing identical security policies as Bitcoin Core
  • Z-DAG on asset layer, bridge to Ethereum on asset layer
  • On-chain scaling with prospect of enabling enterprise grade reliable trustless payment processing with on/offchain hybrid solution
  • Focus only on Simple Value Transfers. MVP of blockchain consensus footprint is balances and ownership of them. Everything else can reduce data availability in exchange for scale (Ethereum 2.0 model). We leave that to other designs, we focus on transfers.
  • Future integrations of MAST/Taproot to get more complex value transfers without trading off trustlessness or decentralization.
  • Zero-knowledge Proofs are a cryptographic new frontier. We are dabbling here to generalize the concept of bridging and also verify the state of a chain efficiently. We also apply it in our Digital Identity projects at Blockchain Foundry (a publicly traded company which develops Syscoin softwares for clients). We are also looking to integrate privacy preserving payment channels for off-chain payments through zkSNARK hub & spoke design which does not suffer from the HTLC attack vectors evident on LN. Much of the issues plaguing Lightning Network can be resolved using a zkSNARK design whilst also providing the ability to do a multi-asset payment channel system. Currently we found a showstopper attack (American Call Option) on LN if we were to use multiple-assets. This would not exist in a system such as this.

Wallets

Web3 and mobile wallets are under active development by Blockchain Foundry Inc as WebAssembly applications and expected for release not long after mainnet deployment of Syscoin Core 4.2. Both of these will be multi-coin wallets that support Syscoin, SPTs, Ethereum, and ERC-20 tokens. The Web3 wallet will provide functionality similar to Metamask.
Syscoin Platform and tokens are already integrated with Blockbook. Custom hardware wallet support currently exists via ElectrumSys. First-class HW wallet integration through apps such as Ledger Live will exist after 4.2.
Current supported wallets
Syscoin Spark Desktop
Syscoin-Qt

Explorers

Mainnet: https://sys1.bcfn.ca (Blockbook)
Testnet: https://explorer-testnet.blockchainfoundry.co

Thank you for close consideration of our proposal. We look forward to feedback, and to working with the Reddit community to implement an ideal solution using Syscoin Platform!

submitted by sidhujag to ethereum [link] [comments]

Electrum Help

newbe to bitcoin created a Electrum standard wallet, bought bitcoin from exchange and transfered from exchange to Electrum now i want to transfer from Electrum to a Trezor,entered Trezor address and amount clicked pay and transfer has been pending for a week. I have not been able to find anywhere to pay a fee. Electrum 4.0.2 preferences, transactions, shows a ticked box. use replace by fee, and, enable output value rounding. any help would be appreciated. thank you.
submitted by Victor8126 to Electrum [link] [comments]

[PSA] Electrum and Eclair both support Testnet-LN to learn about LN

Update

I rewrote this post to clean it up a bit and add more context.
With the last few drops of Electrum it's been much easier to use LN. I've played around with Electrum-desktop on testnet. Everything worked great, and it is a great way to learn about channel capacity and invoices without having to put real money at risk. Electrum has a "swap" button to adjust capacity but I think it may be broken on testnet presently. There are a few ways to adjust capacity / liquidity that I'll discuss below.

Get Electrum running

  1. Install Electrum 4.0.2 and run it on testnet enabling LN.
  2. Get testnet BTC and send it to Electrum
  3. Open a channel in Electrum with either a known entity, or use their channel suggestion
  4. Wait an hour or so for the channel to open.
  5. Perform a submarine-swap operation to give you a 50/50 capacity
  6. Wait for the swap to complete

Balance capacity

LN channels have a (local) sending capacity and a (remote) receiving capacity. To verify your local/remote capacity click on the channel and view "Details". New channels default to 100%/0% local/remote capacity, meaning you can send, but not receive. There is also some rule that requires you to be below 90% local before you can receive anything. So if you need to receive payments on LN before you spend 10% of your local capacity you will need to find a way to balance local/remote. As mentioned before, the easiest is just to spend (try starblocks), but if you don't have anything to spend on there are some other options

Test Node Visibility

Once you free up some receive capacity, you also need to ensure that your node is reachable. In the default config your node will not be publicly visible. Electrum will handle the last hop for you, but your sender still need to at least be able to route to one of the nodes you have receive capacity on. This may occationally fail causing "Path not found" errots when sending, or when others send to you. In the Electrum preferences there are some options to run local watchtowers and keep the app resident. This will help since your wallet needs to be running for it to receive payments. But even if you enable all options sometimes you will just end up on an isolated node. If this happens, take care to ensure you connect to nodes that are highly connected to others (view 1ml highly connect list).
If you want to test your visibility, just paste an invoice in this thread and hopefully someone can try to send you some tBTC-LN.
submitted by brianddk to Bitcoin [link] [comments]

What hardware do I need?

as a learning project I want to start running the following
a full node
lightning node
my own electrum server
joinmarket implementation
Any other new and exciting things that will help with the nitty gritty of being a proper bitcoin user
Will a Raspberry Pi 4 suffice for all these at once? How much hard drive space will I need? how much RAM should I get. Apperently I'll need an SD card as well?
Is there any particular kit that is worth getting or should I assemble it piece meal? I know nothing about this, so really any suggestions/advice would be greatly appreciated
submitted by chucktheschmuck to Bitcoin [link] [comments]

Fun Fact: This is the closest a Millionaire Makers drawing thread will get to Christmas Eve! Comment to enter, and let’s make someone’s Christmas while we still can! [Drawing Thread #37]

OBLIGATORY EDIT: Thanks for the Silv'a, kind and generous stranger. For your generosity, have a video of Silver, from the hit video-game, Sonic the Hedgehog 2006, detailing the glorious benefits silver has on the Reddit culture! Thank you. (I hope you liked the joke.)

Santa Claus is coming! …and apparently it’s a 100,000 people in a red trench coat.

Edit: There are three deleted comments. The drill is to run the code again at 3:00 UTC, with a trial run before and after.
Quick Announcement:
On December 28, 2018, one week after this drawing, I will conduct a survey to help determine this subreddit’s direction. Additionally, the moderation team will unveil a new Discord server at the same time for our subscribers to discuss the subreddit and the drawing. Here are some questions you can expect (updated):
  • What day of the month would you like the /MillionaireMakers drawing to be held?
  • Should the code be further streamlined to acquire comment IDs at a faster and just pace? (Context: There's new code that can be used to prevent further cases of cheating, but it also changes the process.)
  • What is the best cryptocurrency blockchain to choose the winner from?
  • Should the [Drawing Thread] post's format be revamped in the future?
  • Should there be monthly or seasonal announcements the Monday of the [Drawing Thread]'s week?
If you would like to see something specific change over here at /MillionaireMakers, please click here! Your comments will help determine any additional questions the moderation team should ask the subscribers.
TL;DR: Leave a comment on this thread. A random user will be chosen, and everyone donates a dollar to make a millionaire. You are welcome to spread this thread via upvoting, telling friends and family, and sharing on social media! If you'd like to be reminded to donate to the winner by RemindMeBot, click here!
What is this, anyway?
Three years ago, a Redditor posted an idea in /Showerthoughts that speculated the fact, if a million people picked a certain Redditor and all donated just $1, they would have the power to make someone a millionaire.
This subreddit is an embodiment of that showerthought, and the monthly drawings are the attempts to make it happen.
We need your help to keep this running, which amounts to only $1 a month to make someone's day. In the long term, that’s $120 every decade, which is a much more affordable price than other expenses. How does it work? Below, you will find an explanation on entering, rules to keep in mind, the selection, and other important things to note.
How to enter:
  • REQUIRED: Leave only one (1) top level comment in reply to this thread! Replying to other comments will not count. It is highly recommended to comment "RemindMe! 3 days Donation for /millionairemakers", which will remind you via PM to donate.
Important Rules:
  • Only ONE top level comment per person (replies and subsequent-level comments aren't included), but feel free to reply to other comments. Making duplicate top level comments may result in exclusion from entering. Go to me to ensure you don't accidentally double comment.
  • If, by any chance, you do double comment, delete any extra duplicates ASAP, ideally before the thread is locked in 24 hours, as any chosen draws found to violate this will not be eligible to win, and will be banned from the subreddit.
  • Your account must be older than 30 days with some amount of activity. Throwaway accounts with very minimal activity will also not be eligible. This is to prevent multiple entries from the same person.
How will the winner be picked and how can you donate?
  • After 24 hours, this thread will close, and the method of selection will begin.
  • While attempts to make the selection method similar to 2017’s have been performed, it still varies from the original. For an example from a prior drawing, see [Draw #36]. For archival purposes, please click here for the original selection method.
  • Method's TL;DR: Your number is assigned by sorting the comments by old, so the first commenter will be 1, and the list of comments will be publicly released. The subreddit then waits for a randomly generated block (a string of numbers) from Bitcoin's blockchain, after a preselected date and time, and calculates the winner using a formula described in the posts mentioned above.
  • Comment IDs are downloaded at 2:00 UTC, three hours following the thread being locked. There will be a trial run prior to the time listed, one at the time listed, and one trial run thirty minutes after. If it is shown that the deletion of comments has occurred between any of the trial runs, or technical difficulties, the retrieval of the comments will be delayed by an hour, following the same procedures. For [Drawing Thread #37], this has occurred, and retrieval of comments will be delayed to 3:00 UTC.
  • While not necessary, to determine if you are on the list, please go to your comment and save it. The comment ID is what gets recorded and selected, which looks like this: e3yxpj4.
  • The user who created the winning comment will be informed of their luck and will provide any information necessary for their chosen payment methods (mods will help set this up if needed).
  • The generous Reddit community donates to this lucky person, hopefully making some worthy soul a millionaire! A donation table will be stickied to the winner’s post, giving users the freedom in how they donate.
  • The lucky Redditor follows up with a thank you within the next days, revealing to the community exactly how much was raised and thanking their generosity.
Reminders
  • Take the time you have available now to setup your PayPal, Square Cash, and Google Wallet account, and/or cryptocurrency wallets. (Note: Some services may not be available depending on where you reside.)
  • To buy any cryptocurrencies, you may use Coinbase for purchases using your bank account.
  • To store cryptocurrencies, there are many accessible wallets, and if you win, you will be guided on which ones to download. For Bitcoin and Bitcoin Cash, it’s recommended to use the Electrum and Electron Cash wallet for Mac, Linux, and PC.
  • Please try your best to donate a $1, no matter who wins. Every single dollar, cent, anything really counts, so please take the effort to remember and go through with it.
  • If you want to be reminded to donate, please comment "RemindMe! 3 days Donation for /millionairemakers".
  • Spread the word! The more people who participate, the better this gets for everyone! There has been a correlation between this subreddit making it in /all and an increase in donations.
  • Try to cross-post to relevant subs, and upvote. There is a correlation between reaching /all and the amount of donations for the winner. (Please don't spam other subs though. We're not trying to make any enemies here.)
  • If you are under 18, please talk to your parents to get their consent to participate and use their help to setup a PayPal account.
MOST IMPORTANTLY
Remember, this is about generosity, making history, and coming together to make someone's life better. It takes three minutes to donate a bit to the winner, whether you're well off and want to donate a couple bucks, or going through tough times and can only donate a few pennies. Every cent counts.
Note about legality: This is NOT a lottery. You don't have to pay to enter. No prizes are given away directly by the moderators of this subreddit (the moderators will never even touch your donations; this is done voluntarily). As for gift taxes, according to the IRS they're generally paid by the donor, and any donations under $14,000 is not taxable.
If a lone $1 can get you a Dollar Tree-worthy present, imagine the possibilities with $1,000,000. You can go invite your family to a Disney World vacation, invite friends without hesitation, or put up Christmas decorations!
One million dollars can be enough to make someone’s Christmas. Spread the word: have your friends and family comment, post the link to your friendly-neighborhood social media network, and share it to anyone interested.
LET'S GIVE THE GIFT THAT KEEPS ON GIVING!
A Christmas delight,
With people dear, near, and cheer.
The winner’s tonight!
submitted by lilfruini to millionairemakers [link] [comments]

Need help figuring out what I did wrong

Hi Community. A few days ago, I posted asking about what part (passphrase, seed, etc) I share to do a giveaway on a site I work for.
I set up an Electrum wallet with a small about of bitcoin in it. It was suggested by some users that the part I needed reveal for someone to claim the wallet/prize was the seed. It was a 12 word phrase.
I did that...but it doesn't seem anyone has claimed it. I have had a few people ask me how to claim it. Can anyone help me with this? I would hate for anyone to think it was a scam. I am not trying to scam anyone. I just wanted to do a fun giveaway and possibly gain some new users on the site.
submitted by tah8605 to Bitcoin [link] [comments]

Not sure if this is the place to post but I recently set my nephew up with a bitcoin account to accept donations on Twitch/Youtube, is there a way to get a balance without giving him the account information?

I want to basically set up something that he can either just check the balance without him signing on to electrum or whatever so he doesn't send coins or give out wallet information. He is only 10 but understands the basics of how crypto works. He only has 60 subscribers and I figure they are all his age and don't even know bitcoin exists but I was going to drop a few dollars worth into his wallet every couple of days to get him into crypto young. Any help would be appreciated.

Edit: Thanks for the replies. Block explorer works great for what I needed. Thanks to everyone for the advice.
submitted by Pi11cosby to Bitcoin [link] [comments]

It's time to make a millionaire and give the gift of giving! [Drawing Thread #36]

OBLIGATORY REDDIT GOLD AND PLATINUM EDIT: Please stop. You keep making me lose my editing virginity. Thanks though, kind strangers, but still stop. I don't deserve this.
SECOND EDIT: I also added a bullet point on downloading the list of comment IDs. For a quick rundown, I rescheduled it to 5:00 UTC, if you would like to replicate this for yourself.
THIRD EDIT: There has been a discrepency. Comments will be retrieved again at 6:00 UTC.
FOURTH EDIT: I overslept and now I am depressed. Comments will be retrieved again at 13:00 UTC.

Merry Giving of Thankfulness!

TL;DR: Leave a comment on this thread. A random user will be chosen, and everyone donates a dollar to make a millionaire. You are welcome to spread this thread via upvoting, telling friends and family, and sharing on social media! If you'd like to be reminded to enter the next drawing by RemindMeBot, click here!
What is this, anyway?
Three years ago, a Redditor posted an idea in /Showerthoughts that speculated the fact, if a million people picked a certain Redditor and all donated just $1, they would have the power to make someone a millionaire.
This subreddit is an embodiment of that showerthought, and the monthly drawings are the attempts to make it happen.
We need your help to keep this running, which amounts to only $1 a month to make someone's day. In the long term, that’s $120 every decade, which is a much more affordable price than other expenses. How does it work? Below, you will find an explanation on entering, rules to keep in mind, the selection, and other important things to note.
How to enter:
  • REQUIRED: Leave only one (1) top level comment in reply to this thread! Replying to other comments will not count. It is highly recommended to comment "RemindMe! 3 days Donation for /millionairemakers", which will remind you via PM to donate.
Important Rules:
  • Only ONE top level comment per person (replies and subsequent-level comments aren't included), but feel free to reply to other comments. Making duplicate top level comments may result in exclusion from entering. Go to me to ensure you don't accidentally double comment.
  • If, by any chance, you do double comment, delete any extra duplicates ASAP, ideally before the thread is locked in 24 hours, as any chosen draws found to violate this will not be eligible to win, and will be banned from the subreddit.
  • Your account must be older than 30 days with some amount of activity. Throwaway accounts with very minimal activity will also not be eligible. This is to prevent multiple entries from the same person.
How will the winner be picked and how can you donate?
  • After 24 hours, this thread will close, and the method of selection will begin.
  • While attempts to make the selection method similar to 2017’s have been performed, it still varies from the original. For an example from a prior drawing, see [Draw #33]. For archival purposes, please click here for the original selection method.
  • Method's TL;DR: Your number is assigned by sorting the comments by old, so the first commenter will be 1, and the list of comments will be publicly released. The subreddit then waits for a randomly generated block (a string of numbers) from Bitcoin's blockchain, after a preselected date and time, and calculates the winner using a formula described in the posts mentioned above.
  • Comment IDs are downloaded at 2:00 UTC 5:00 UTC, three six hours following the thread being locked. There will be two trial runs prior to 2:00 UTC 5:00 UTC, and one trial run thirty minutes after. If it is shown that deletion of comments are occurring between any of the trial runs, or technical difficulties, the retrieval of the comments will be delayed by an hour, following the same procedures.
  • To determine if you are on the list, please go to your comment and save it. The comment ID is what gets recorded and selected, which looks like this: e3yxpj4.
  • The user who created the winning comment will be informed of their luck and will provide any information necessary for their chosen payment methods (mods will help set this up if needed).
  • The generous Reddit community donates to this lucky person, hopefully making some worthy soul a millionaire! A donation table will be stickied to the winner’s post, giving users the freedom in how they donate.
  • The lucky Redditor follows up with a thank you within the next days, revealing to the community exactly how much was raised and thanking their generosity.
Reminders
  • Take the time you have available now to setup your PayPal, Square Cash, and Google Wallet account, and/or cryptocurrency wallets. (Note: Some services may not be available depending on where you reside.)
  • To buy any cryptocurrencies, you may use Coinbase for purchases using your bank account.
  • To store cryptocurrencies, there are many accessible wallets, and if you win, you will be guided on which ones to download. For Bitcoin and Bitcoin Cash, it’s recommended to use the Electrum and Electron Cash wallet for Mac, Linux, and PC.
  • Please try your best to donate a $1, no matter who wins. Every single dollar, cent, anything really counts, so please take the effort to remember and go through with it.
  • If you want to be reminded to donate, please comment "RemindMe! 3 days Donation for /millionairemakers".
  • Spread the word! The more people who participate, the better this gets for everyone! There has been a correlation between this subreddit making it in /all and an increase in donations.
  • Try to cross-post to relevant subs, and upvote. There is a correlation between reaching /all and the amount of donations for the winner. (Please don't spam other subs though. We're not trying to make any enemies here.)
  • If you are under 18, please talk to your parents to get their consent to participate and use their help to setup a PayPal account.
MOST IMPORTANTLY
Remember, this is about generosity, making history, and coming together to make someone's life better. It takes three minutes to donate a bit to the winner, whether you're well off and want to donate a couple buckeroos, or going through tough times and can only donate a few pennies. Every cent counts.
Note about legality: This is NOT a lottery. You don't have to pay to enter. No prizes are given away directly by the moderators of this subreddit (the moderators will never even touch your donations; this is done voluntarily). As for gift taxes, according to the IRS they're generally paid by the donor, and any donation under $14,000 is not taxable.
If a lone $1 can get you good feelings, imagine the possibilities with $1,000,000. You can go invite your family to the Thwnksgiving table, take them out, or prepare for the winter season!
One million dollars can be enough to change someone’s life. Spread the word: have your friends and family comment, post the link to your friendly-neighborhood social media network, and share it to anyone interested.
LET'S THANK MAKE A MILLIONAIRE!
Thanks for your patience.
I'm thankful for all of you.
Now give your dollar!
submitted by lilfruini to millionairemakers [link] [comments]

This will sound retarded but I need help.

I wanted to use a service that accepts bitcoins as payment using coingate.
I opened a Electrum wallet on my android.
Bought the minimum of 47 euros of bitcoin on Coingate.
Received 35euros on my wallet. I need 38 euros to make the purchase I wanted in the first place.
How can I buy the amount of bitcoin that I need? Coingate minimun amount to buy is 47euros and I just can't do that again. I am poor and just wanted the wallet to make a one time transaction.
I don't care about fees, I just want something that allows me to buy 10euros worth or less. Please help
submitted by ruggev to BitcoinBeginners [link] [comments]

Im simple man with simple brain

Hey guys i need some help. I want to use bitcoin as a virtual credit card where i give money to bitcoin and i buy something on the internet. And i downloaded electrum. Bitcoin adviced me that on their begginner website. But the thing is when im trying to it says standart wallet, wallet with two factor authentication, multi signeture wallet and import bitcoin address or private keys. So i dont know something about those so i choose standard. I clicked create new seed and there is a choice about legacy or Segwit. I havent heard about them(i need help here), i click randomly segwit and there is 12 words that i cant change, i cant mix their order. Whenever i click on it, it says you may extend your seed with custom words. Then i click extand seed(i dont know what is it) Then screenshot the words and continue i think its like steams save code or something. And there is blank page. Nothing writing on it. Just a place to write something but nothing else. I dont know what to do help.
submitted by krallord55 to BitcoinBeginners [link] [comments]

BTC1 Addresses

I am just getting into this world. I want to put a small amount of my portfolio into bitcoin. I downloaded electrum and managed to verify the signature, but when I asked a friend to send me a small amount of btc to test it out, he said the btc1 addresses are not widely accepted.
  1. Is that true?
  2. Is there a way to change the address in electrum?
  3. If I cannot change it, do I need another wallet?
Thank you for the help!
submitted by Azthioth to Bitcoin [link] [comments]

#5 KryptoGOŚĆ - Płatność za pomocą portfela ELECTRUM (BitCoin) Casa Releases Results on Server Implementation Test Как правильно выставить комиссию в Electrum, чтобы и сэкономить, и не ждать до завтра? 17. How to Check Deposit Address & Verify Transactions with COLDCARD USB and AirGap Address Explorer What is Bitcoin and What is a Bitcoin Wallet

When Bitcoin founder ‘Satoshi Nakamoto’ created Bitcoin, he not only wanted to create a financial system without third-party intermediaries, but he also wanted to allow people to send and receive funds anonymously. In this Anonymous Bitcoin Wallet guide, I am going to start by explaining why Bitcoin can be used anonymously. After that, I will then show you how to get Bitcoins anonymously ... In February 2015, it added Electrum – one of the few Bitcoin wallets with TOR integration – as a pre-installed application. Tails sees Bitcoin as an important part of privacy online and wanted to include a Bitcoin wallet in its software. Since Tails USB drives must be under 4 GB, a lightweight wallet like Electrum was required. 6. Conclusion. Electrum is a great, fast, secure and stable wallet, however, it is not suitable for beginners. The wallet enjoys massive support from the Bitcoin community and is extremely feature rich. If you’re just starting with Bitcoin I wouldn’t suggest this wallet, but if you know your way around the basic terms, Electrum is highly recommended (hey, I use it myself). But it does help you organize things if you also label your address etc. and save the whole request in your wallet. The label and amount you set in the receive tab are only for your own reference. They are not shared with anyone and they don’t restrict how much bitcoin someone can send you. So here’s how to use the receive tab in electrum: Switch to the “Receive” tab; Enter a ... Electrum is a popular bitcoin wallet that features a simple, lightweight interface. Find out how this wallet works today in our Electrum Bitcoin Wallet review. Electrum, found online at Electrum.org, has been a popular bitcoin wallet since launching in November 2011. The encrypted wallet protects your bitcoins behind

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#5 KryptoGOŚĆ - Płatność za pomocą portfela ELECTRUM (BitCoin)

Crypto custody firm Casa released results from its test to find a new way to connect to the Bitcoin network and found ElectrumX had the best bang for the buck. Casa founder and cypherpunk Jameson ... Two guys and some chick comment mockingly while playing through one of retro game's most beloved entries in their long running franchise. Lixin Liu- Creator of the Airgapped Bitcoin Hardware Wallet Cobo Vault- joins me in this episode to talk to me about: -Airgapped Security Features -Cobo Auth... In this video you will learn how to make sure your are depositing to a Bitcoin Address that belongs to your wallet. This is done to make sure Malware on your computer is not trying to trick you ... Get a basic question asked. So I have attempted to break it down in simple words. #bitcoin #bitcoinwallet #askmehow #startbitcointoday

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