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Putting the fun back into FUNgibility (full node, JM, and yield generator)

I'm new to BTC (<1 year) and not a blockchain guru, but I started stacking sats as an alternative investment. I'm not retiring off my crypto anytime soon, but its enough value that I want to increase my BTC security and competency (currently stored in an exchange wallet like a pleb). I was on the verge of moving everything into cold storage, but then I found JM through Googling keywords along the lines of "bitcoin income generation."
I've been studying up on JM for the last 48h, and decided to: build a full node, create a JM wallet, start running yield-generator. Even though it sounds like income will be zero or close to zero, I hope it will be a fun learning project.
I'm going to go out right now to buy some hardware components and will continue to update this thread after each milestone. I'm expecting to learn a lot through this process so I am making this post so that others can learn from my inevitable mistakes, and a place to ask for help if I run into problems.
Stay tuned for updates!

Update 1: Shopping completed. I'm going with a Raspberry Pi with 4GB of ram, 0.5TB external SSD to store the blockchain. I bought a couple of accessories to help me set up the environment (keyboard, mouse, lcd, usb hub). I also bought a pimoroni fan shim to make sure nothing overheats. I'll be using my windows laptop for initial setup as well. Next step is hardware setup and software environment (Raspian, fan service controller, and hdd partition). Image of all hardware components:
Update 2: Good success with the hardware portion of the project. After I got my OS running I immediately nuked my SD card by running fstab without reading man first - classic. I wasted an hour trying to recover, then reflashed my OS and got everything running. First I got the fan service controller working, then formatted external hdd for ext4 (came with ntfs from the store), setup firewall and tor, and installed bitcoind. The next step is to finish allowing my blockchain to sync, and then test all functionality before starting with joinmarket. Results:
Update 3: It is taking a long time to fully sync to the network so I decided to install but not configure JM during this lag time. I successfully installed JM, but I decided to call it quits for today before editing joinmarket.cfg. I was hoping to be completely done today but I lost several hours due to my own incompetence. I should have enough time during the week to continue this project, so I will check back in tomorrow. Does anyone have advice on joinmarket.cfg settings for tor? Current status:
Update 4: After a long delay due to lack of time during work, I finally got everything working 100%. Due to privacy and security advice from friends, I will not be posting any specific information about my JM wallet, but it is up and running and able to submit and participate in coinjoins - very exciting! I'm going to start learning about payjoin next. Thank you to Joinmarket creators and community for helping me through this process... I will continue to provide new content in the future with any significant updates to either joinmarket code base or to my own setup.
submitted by FUNgibility21 to joinmarket [link] [comments]

[ELI5] How to send coins using

How to send coins from ANY wallet using


Because cold wallets, such as those stored offline in a text file as I keep recommending in my standard advice below:
All you need is a text file to put your wallets in, like this example from
1,"D7WBUpdgLRtG6WyPsqjhaKiJR65X8ZGnkZ","6KieLMW1poAzNVnmLuQZqA262gxEQ51eLGdDK8e2GL2B4LHCKKb" 2,"DM8LT16d49zHr8ByXbUwZb9UBXDGMaZRdc","6Ktgxdv6vN9v2bDHwcJBBb3oMRAgXJumESzBnxaXUSGFZoq6pWQ" 3,"D5UCa51AfxjtVHQ46oYXe2YfkctTeLXPhx","6L2WSPWadRYCwt2L1CxH6zC7PoTYY3KyjxdiUoCqi5eyq6hQKvj"
Use to move coins. Download both sites and run them offline. Use to check balances and transactions. See for tutorial. And read the ELI5s (and my history) for more info.
Are without doubt THE SAFEST way to store your coins. Plus, they consume no resources. No bandwidth, no network stress for every node we have, no storage of 20Gb+ blockchains, no weeks of waiting for things to sync, no tearing your hair out and posting desperate pleas for help, and most importantly, no coins irretrievably lost because you or your client screwed up.


Wallets, ALL WALLETS are nothing but numbers. Very large numbers, but fundamentally no different from “7”, “42”, “911” or a phone number. They cannot be created nor destroyed, and you either know them or you don’t. Anyone who knows a key can use it to spend any coins it controls. Anyone who doesn’t know it, can’t. Don’t be the guy who doesn’t know his own keys. Keep them safe. Make copies. Keep those safe. Don’t let your friends, kid brother or random burglar find them, but don’t lose them either.
The only other thing you need for a fully functional wallet is a way to spend coins. is such a way. There are others, such as which tomcarbon built.
Oh, and you can and should download it and run it locally.


The default entry point for is because this settings page is very well hidden. Its in the tiny gear wheel on the Broadcast page.
Looking across the top of the page, you can see
  • + New
  • Verify
  • Sign
  • Broadcast
  • Wallet
  • About
We’re only going to use three of these. New, Sign, Broadcast.
Now, keep in mind that is an old Bitcoin tool which tomcarbon added Dogecoin to. Sometimes it thinks its dealing with Bitcoin still, so if you see anything odd, go and make sure you’ve selected Dogecoin in the Settings page.


This tool should be the only place you spend coins. Sure, some clients may look more convenient, but they all suffer from a very big coin-losing flaw. Whenever you split a UTXO, they create a new wallet to send the change to. And they DON’T TELL YOU! This means unless you back up after every transaction, you run a high risk of finding all your coins have ‘disappeared’ from your wallet, and you don’t recognise where they went.
So if you use a client for the convenience as well as a text list of your wallets, you won’t know to add a new wallet to your masterfile. Its best to ditch the clients entirely.


Now we come to the nitty-gritty. Lets use those three wallets above and assume that #1 is the source, #2 the destination and #3 the change wallet. Note that these won’t actually work, as none of them have ever been used, but they will do as examples.
New Transaction
Located at the bottom of the New menu, this will give you a page to enter your wallets and amounts.
In the top field, you enter your source address or Key. If you use the key, it will calculate the address when you click the Load button, which should match what you expected. Note that Load only brings in the first 100 UTXOs. This is so that you can retrieve coins from high-volume wallets which would kill any client. is in fact the ONLY WAY to do this, as even QT falls over around 600 UTXOs.
You will see the total balance that was loaded in the Transaction Fee field. And also in the Inputs tab, where you can go to adjust which UTXOs to spend.
Now you need to add the wallet(s) and amounts to send to them. Lets suppose the source contained a single UTXO for 1,000 Doge. You want to send 500 of them. So you would enter the #2 address in the Address field, and 500 in the Amount field. The Fee now changes to 500, which is not what you want.
So you click the + button to bring up a new line, enter the change address and the other 500, making the fee zero.
And you’re done. Check that the Fee is indeed zero. Check that the amounts shown in the Outputs and Inputs tabs match exactly.


There is a bug which will send all the coins to the miners if the Outputs exceed the Inputs. I would have expected the Fee to show as negative in such a situation, but it doesn’t. BE WARNED!
Once everything looks right, hit the Submit button.
This will give you a block of hex code. Copy it.
Go to the Sign tab and paste it. Add your private key for the source wallet and click Submit. Note this can be done offline for safety.
This will give you another block of hex, the SIGNED transaction.
Copy this and paste it in the Broadcast tab and click Submit.
That’s it. Your coins are on their way. Make a cuppa and settle in while they arrive in a minute or three.
Note: All fields retain their values unless you refresh the page! This can be a boon when doing multiple transactions, such as when emptying a huge wallet. But it can also be a trap for the unsuspecting. Refresh or close the window when you’re done.


Who should use this?
Absolutely EVERYONE!
Even if you’re wedded to your client in some satanic blood-contract, you should still know how this works, because sooner or later you’re going to have a problem you can’t fix without it.
Definitely download the site and store it on every device you have. On every USB backup of your wallets. On your phone (well, except iOS which doesn’t do local HTML), etc, etc, etc.
Oh, and if you’re a programmer SmartyShibe, do consider improving the code over on GitHub.
EDIT: added courtesy of AtomHearth
submitted by Fulvio55 to dogecoin [link] [comments]

Crypto Wallet

Crypto Wallet Guide
Humans have come a long way from the barter trading (trading goods without using the money) to gold, then later to paper currency and now we have arrived in the age of digital currency.
There are more than 2000 cryptocurrencies in the world with a market capitalization of around $175 billion, it is necessary to know about them. Where these currencies are stored? How does the crypto wallet work? If You are still reading this, it says you are a beginner and want to explore the crypto world.
To understand the crypto concept, first, know about the crypto wallets.
What Is Cryptocurrency Wallet?
A cryptocurrency wallet is a software program used to store, send, receive private and public keys and can be used to track ownership. It enables you to send and receive digital coins through blockchain. Wallets are a necessary factor for investing and owning cryptocurrencies of any sort.
However, Some wallets are built for a single cryptocurrency( bitcoin and coins forked from bitcoin like bitcoin cash), some can be used for more than one coin(multi cryptocurrency wallet), some wallets you’ll manage yourself, and some will be custodial.
What Are Public & Private Keys?
A public key is a unique identifier for a person and a private key is like a password similar to an ATM pin. A sender will require the public key of the receiver to send him the cryptocurrency and the receiver will be able to access and use these cryptocurrencies by using the private key. A private key must be protected in order to avoid fraudulent activities such as hacking, stealing of cryptocurrencies, etc.
A public key can be extracted from a private key, but a private key can never be extracted from a public key.
A private key should always be kept safe. Exposing it would be vulnerable for various hacks and stealing of the coins by with whom you have shared. sending them to another wallet which they control.
Example of a private key: N2nGYRCBbs6ZRs8w5LHam4r85ikxBzhRNgpNJjqk7D5vrpuaVJB
Example of a public key: 958ikZuaAbGkzXuFL9sfGHYj9ethop8qMh
How Does a Cryptocurrency Wallet Work?
Cryptocurrency wallets work like the safety deposit boxes. Unlike traditional pocket wallets, where they don’t store digital currency. The crypto wallets store your private and public keys and interface with multiple blockchains. Thus, users can track their balance, send money and conduct other operations.
Moreover, currencies don’t get stored in any single place. Also, it is advised not to store the cryptocurrencies on the wallet offered by the particular exchange, because the exchange will own your private key. So better you transfer it to your own crypto wallet to have control over the cryptocurrencies owned by you.
A wallet address is the same as a bank account number. Providing your bank account number to other people, as they need it to transfer your funds. For example: This is like your friend transferring you money, so he needs your bank account number.
In the world of cryptocurrency, if anyone wants to transfer you crypto coins, you should provide him with your wallet address. Similar, like in the real world, however, no two wallets can have the same address, which means that there is no risk of your fund being to transfer to others address. Moreover, there is no limit to the 5number of wallet addresses you create.
Different Types of Crypto Wallets
There are multiple types of wallets that provide different ways to store and access your digital currency.
Hot Wallets vs Cold Wallets
you might come across frequently with the terms “hot wallets” and “cold wallets”. All crypto wallets fall under these two types.
In general, whatever is connected to the internet is less secure than something that is not. This is the difference, where “hot” wallets are connected to the internet and “cold” wallets” are not.
Online, desktop and mobile wallets are hot wallets, while hardware and paper wallets are cold wallets.
1). Software Wallet:
There are three forms of software wallets:
Desktop wallets: These are installed on a laptop or a PC, and can be accessed from a single computer. Although they provide high security, if the computer is attacked by the virus, there is a chance of losing your wallet.
Online wallets: These wallets run on the cloud and can be accessed from any device. Here, your keys are stored online.
Mobile wallets: These wallets that run on an application in a smartphone; they are simpler than the desktop wallets and can be used anywhere.
2). Full Node Wallet:
Here you can control your private keys and provide a full copy of the blockchain. Essentially every coin has an official wallet of this type and that can be found on the official GitHub of the site. “Official” means endorsed by the developers who created the coin.” Many cryptos are decentralized, so there is no real official anything.
3). Coin-Specific:
A wallet which works only with a specific coin.
4). Network-Specific:
A wallet which can hold multiple tokens on a single network.
5). Hardware Wallet:
These type of hardware are specifically built to hold cryptocurrency and keep it safe. This includes USB devices. Moreover, these devices can go online to make transactions and get data and then can be taken offline for transportation and security.
6). Paper Wallet:
This type of wallet lets you to both send and receive digital currency using a paper wallet. You can take a print of your QR code for both a private and public key. With this feature, you can completely avoid storing digital information about your currency by using a paper wallet.
7). Custodial Wallet:
In Custodial wallet, you can’t control your keys directly. Most exchange wallets are custodial wallets.
8). Multisignature Wallet:
It requires multiple parties to sign a transaction for any digital money to be spent. Multisignature wallets are designed to have more layer of security.
How To Choose a Wallet?
Here are some ideas on how to choose the best wallet for you.Hardware and paper wallets are the best to secure funds. Also, We always suggest official or officially endorsed wallet for any given coin.
Ledger Nano S: Multi-currency support, Built-in Display, Easy to operate, Security, Backup and restoration.
Ledger Blue: Malware proof, Multiple currencies, Secure elements.
Jaxx: Exclusive design, Easy to use, Personalized key, available on multiple OS.
Edge wallets: Security, Multi-Currency Support, Easy to use.
Exodus : Multi-currencies, Complete security, Great design, Multi-currencies.
Coinpayment: Bit-go integrated, Online store acceptable, vault, multi-coin wallet.
Most top performing wallets are (Binance, Coinbase, etc.) and they have exchanges too that offers for easy and quick trading between Bitcoin and other crypto or bitcoin and fiat currencies.
Online wallets are prone to security hack and therefore should be used as little as possible. It will be safe to divide your funds among the different types of wallets.
How to Register in a Wallet?
If you are a newbie to the crypto world, then read these points before proceeding:
Download the official wallet from the website.
Register for a custodial wallet service ‘Coinbase’ or non-custodial wallet service like ‘Blockchain’ Wallet (which handles both wallet and exchange with one account).
Purchase a hardware wallet like TREZOR for storage.
Use a universal software wallet or any other wallet that meet your needs like the ones mentioned above.
Coinbase and TREZOR are one of the good major choices, since, they have guides and can be kept safe with the best execution, and also, don’t need to download the full blockchain for a coin.
If you want to know more about particular wallets, Visit our crypto wallet section, you can enjoy reviews on many crypto wallets.
The post Crypto Wallet Guide appeared first on Cryptocurrency information | Cryptocurrency News | Bitcoin News and Crypto Guide.
submitted by ruwanthathisara to BitcoinGuide [link] [comments]

Cold wallet using a Raspberry Pi Zero 1.3

Hi everyone. I'm relatively new to the world of Bitcoin. I'm very interested in the blockchain as a technology. In order to explore, I wanted a secure way to generate a wallet.
The Ledger Nano S is scarce, so I started looking into rolling my own cold wallet. I settled on using a Raspberry Pi Zero 1.3. The Zero 1.3 is only $5 and has no networking hardware, but it does support being a USB serial client device. While technically an air gapped machine wouldn't have any communcication at all, I think a serial only link is good enough for my purposes -- No internet and no USB mass storage.
The trick was, how to install Electrum and all its dependencies without ever connecting the Pi Zero to the network. This is normally a few calls to 'apt-get' and you're done. With no networking, you have to determine the dependencies and download them manually. So I wrote some python scripts to download the necessary packages, verify their checksums and zip. Then, using Z-Modem, transfer it all over the serial link and install. (Flashbacks to BBS's in the 1990's)
Anyhow, its a long elaborate process for something that would normally be very simple... but once done, its a little linux machine that has never connected to the network and hosts an Electrum offline wallet nicely. Electrum's command line interface makes it easy to perform tasks over the serial terminal. I also put Etherium stuff on there for good measure.
I'd value any opinions or suggestions for improving my setup. You can find my step-by-step here: and I've posted the dependency list and python scripts to GitHub in case anyone's interested.
submitted by AllAboutJake to Bitcoin [link] [comments]

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