Backing up your wallet - Bitcoin Wiki

I just installed Ubuntu OVER Windows, it looks like nothing is left, did I definitely lose my bitcoin wallet.dat? /r/Bitcoin

I just installed Ubuntu OVER Windows, it looks like nothing is left, did I definitely lose my bitcoin wallet.dat? /Bitcoin submitted by coincrazyy to BitcoinAll [link] [comments]

Wallet Recovery Help

Hello!
I’m seeking help from the /bitcoin community to recover lost funds from a wallet.dat file. Someone I know asked me to help recover their lost funds - but I’m stumped and now seeking help from the experts.
Facts
Problems
Questions
I was under the impression that the wallet.dat file contained a private key which corresponds to any / all newly created receiving addresses, but I must be mistaken.
Any advice would be greatly appreciated. The person is at a dead end and I'm fresh out of ideas.
Thank you
submitted by DominusVobiscum_ to Bitcoin [link] [comments]

Make your own stakebox. Ultimate beginners guide how to compile any wallet on AARCH64 (Raspbery pi and other SBC)

I contemplated to wrote this for a long time, so it's finally time.
As you know a lot of altcoins uses PoS (Proof-of-stake) way of "mining" coins. Which basically means, that you hold coins on your unlocked wallet and you are receiving stakes as a reward. This requires very little power and it can bring you a lot of rewards, at just 10W from the wall.
So first I am using latest Raspbian on RPI4B 4GB in this example.Setting up Raspbian is not part of this process since it's very well documented. I recommend to change user from pi to something else due to security concerns and you can also do other stuff just search "security Raspberry PI" and you find a lot of articles, but this is not the focus of this guide.
I know there are a lot of guides on the internet, but I am using like 5 sources, so it's compiled what other people wrote and some of my research.
I am using AnyDesk insted of SSH or VNC server, because it works it's ligthweit and it just works.
So after you see the gui of Raspbian, just launch terminal (CTRL + ALT + T) and do basic thing:
sudo apt-get update && sudo apt-get upgrade
Than press Y and let it run, after is finished, we need to prepare so dependency packages. Since most of the wallets using Berkeley DB 4.8 we need to obtain it.
So in terminal wrote:
cd cd Downloads wget http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz tar -xzvf db-4.8.30.NC.tar.gz cd db-4.8.30.NC/build_unix ../dist/configure --enable-cxx make sudo make install 
So wait unti it's finished and than you can delete files in Downloads folder in gui or use:
sudo rm -r [folder] 
So next thing we need to install some libraries.
sudo apt-get install git build-essential libtool autotools-dev autoconf pkg-config libssl-dev libcrypto++-dev libevent-dev libminiupnpc-dev libgmp-dev libboost-all-dev devscripts libdb++-dev libsodium-dev 
And pres y and let it run. After that another set of libraries:
sudo apt-get install libqt5gui5 libqt5core5a libqt5dbus5 qttools5-dev qttools5-dev-tools libprotobuf-dev protobuf-compiler libcrypto++- dev libminiupnpc-dev qt5-default 
And then again pres y and let it run. Some wallets need older version of libssl1.0-dev, so for for safe compiling we install that as well:
sudo apt-get install libssl1.0-dev 
Pres y and let it run. Warning don't use sudo-apt get autoremove, since it would wipe this package, since it's old.
Next thing we are going to obtain Bitcoin PPA filest, which can be done like this.
cd /etc/apt/sources.list.d/ sudo nano bitcoin.list 
Paste this in there:
deb-src http://ppa.launchpad.net/bitcoin/bitcoin/ubuntu artful main 
And CTRL+X and than y, then do this:
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv C70EF1F0305A1ADB9986DBD8D46F45428842CE5E sudo apt-get update 
So now we are ready for compiling. So we are going create folders. CD yourself where this folder should be situated, if you for example have plugged in some external drive. Then:
mkdir Crypto cd Crypto 
And then we have to choose wallet which you want to compile. I am choosing Streamies (STRMS) as an example, since it's pretty good coin for staking. So:
mkdir Streamies cd Streamies 
Then go to the github page and click on the green button on the left and click copy to clipboard, which gives you git link.
git clone https://github.com/Streamies/Streamies.git 
Watch the output folder which it creates, it's stated in the first two lines and copy then by highliting the text and CTRL+SHIFT+C copy it to your clipboard.
cd Streamies (this is that git created folder) ./autogen.sh ./configure CPPFLAGS="-I/uslocal/BerkeleyDB.4.8/include -O2" LDFLAGS="-L/uslocal/BerkeleyDB.4.8/lib" sudo make (this could take hours) sudo make install 
And you are done, files is going to be in folder /uslocal/bin (DO NOT delete git created folder, because you are going to need it for faster compiling, when wallet get's and update.)
cd /uslocal/bin 
Now you can list files by:
ls 
And then you can copy/move them where ever you want by using:
sudo mv * [destination full path] 
Let it run and go back to folder where you move those files.
sudo chmod +x streamies-qt (since we want to run wallet) 
In most cases compiled files are going to in format of "shared library" so we need to create script to run it. Open up a text editor from gui or through nano. And paste this to that file:
#!/bin/bash ./streamies-qt 
And save it as a sh file, for example run.sh. Then we need to make it runnable so:
sudo chmod +x run.sh 
Now to run it, it's just:
./run.sh 
And here we are glorious GUI wallet appears and you are done, you can paste blockchain, wallet.dat from other sources, so this migration is pretty easy and you, if you have it on for exaple flash disk.
So this is basic how to compile QT wallets on AARCH64. I am running 7 wallets, 2 of those are Masternodes and RPI 4B 4GB would handle way more, I am at best on half of my RAM.
Some wallets need more package, but it's not much of and issue, since compiling stops and you just copy paste nape which is missing put it in the google and add "apt-get" after the name of package and you are going to see, what is the name of the packages so it can be retreived from package assinstant aka apt-get. So basically:
sudo apt-get install [package name] 
Then press y and again wrote:
sudo make 
This process is going to continue where it was left off, so nothing is going to run from beginning.
Updating wallets is basically exactly same, just repeat steps from "git clone" and after that proceed as it was written above.
So I hope this helps some of you, to use this at home and not on some VPS, if you are anxious as me, to host my wallets on remote server.
submitted by M1chlCZ to CryptoCurrency [link] [comments]

06-16 12:55 - 'boss linux' (self.linux) by /u/bossdevelopers removed from /r/linux within 437-447min

'''
-BOSS PROJECT: Standing for Blockchain Operative System Series is a new Linux distribution based on ubuntu core with important changes, highly improved security and the default incorporation of blockchain services and support for cryptocurrencies.We have modified the original standards to transform it into a very useful tool for the entire bitcoin community consisting of an interesting combination of security, manageability, speed and performance. It can be used on any x64 X86 machine simply after installation.
.-BLOCKCHAIN FULLY DEDICATED: It has been more than a decade since the physical birth of cryptocurrencies, although the idea is over 50 years old. The future will undoubtedly be governed by blockchain systems and governments, banks and corporations are already taking positions in this regard. BOSS is not far behind. Now it is possible to mine even if it has not been done previously. For even more in-depth development of the blockchain applications included in BOSS operating systems, you have your own version of bitcoin PoW PoS mining: BitcoinBOSS. Our own blockchain that is enhanced with BOSS token erc20.
-BOSS SECURITY & PRIVACY FEATURES: A weak point of easy access for hacker attacks, such as automatic updates, has been modified so that the user can carry out his updates when he deems necessary and under monitoring. The elevated privileges allow you not only to modify the system, they also allow you to quickly act on files that are prohibited from accessing other operating systems. BOSS has installed active-passive security measures
-MAC ADDRESS DEFAULT SPOOFING: MAC address Spoofing privacy + from BOSS. Every time you log in to your BOSS computer, you are doing so with a different MAC address. Privacy thus reaches its highest degrees by making MAC-TRACK impossible
-LIGHTWEIGHT RECORD: BOSS has achieved maximum performance in a really small space. BOSS takes up very little space and can be downloaded via torrent or direct download through our mirrors. BOSS has concentrated a large operating system in a super small space of less than 1 GB, which puts us at the forefront among the lightest and safest distributions as leaders in relation to gb-installed applications.
-INSTALLATION PROCESS: BOSS installation is simple and guided using the ubiquity installer and depending on the performance of your system it can take between 15-30 minutes in normal circumstances. Download BOSS now and enjoy a high level of performance, security and privacy in an enviable small space. BOSS can be tested after installation, fully or partially installed on your system, together with windows or your favorite operating system.
.-POWERFUL RECOVERY TOOL: BOSS is an excellent file recovery tool. The combination of BOSS tools and its elevated privileges allow you to access areas hidden or inaccessible. Simply use BOSS live to freely rescue files from the laptop where the BOSS USB is inserted. Recover Bitcoin paraphrase or .DAT files easier and faster than other recovery programs simply by acceding to the file system where BOSS usb is inserted.
-STABLE RELEASES: BOSS V01-LTS Available now for download at sourceforge.
[**[link]2
FEATURING
-UNITY DESKTOP-BRAVE BROWSER-ATOMIC WALLET-COMMON UTILITIES-ELEVATED PRIVILEGES ENABLED.-MAC ADDRESS SPOOFING-FILE SYSTEM RECOVERY TOOL
-WE DELIVER BOSS: Using BOSS as removable OS is recommended if you do not want to install the system. For this our team recommends the use of persistent USB where your session is recorded and ready for the next login, find everything as you left it. BOSS makes available to its users the delivery of these persistent USB devices worldwide via regular mail or messaging. The flat rate of our installation on the USB and shipping to the user is USD 20 to which we must add the shipping costs in the options selected by the user. Please check with our team to process your shipment while this process is automated on our website. Order now your BOSS or a even more customized BOSS with your company requirements, logo etc. We deliver in CD, USB or SD card in your selected size from minimal 4GB, however 16GB and above are recommended.
[link]3
[link]4

[link]5
'''
boss linux
Go1dfish undelete link
unreddit undelete link
Author: bossdevelopers
1: *ourcef*r*e.**t/proj*cts/*oss-min*mi*al*ed**ion/ 2: sourceforge.net/pr*j*cts*****-mi*im**al-editio****]^*1 3: pr*vie*.*edd.it/2j0i*g*tk755*.p*g*wid*h*1*00&form*t*png&**uto*w**p*a*p;s=57745a79590667**059****948ab*84e*1*693*7 4: *revi*w.red*.it*9l8yh7ag*7551*png?wi*th=160*&a*p;fo*m**=png*amp;a*to=***p&s=acd*6e9**8d2*a**4d*b*14737cf**72**dcc2*5 5: pr**ie**re*d.it*3*qyxtw*k755*.*ng?wid**=*600*amp**ormat=p*g&am*;au*o=webp&am*;s=02b*905*4cb**f770b77*13a3*6**90fc*6*0d3b
Unknown links are censored to prevent spreading illicit content.
submitted by removalbot to removalbot [link] [comments]

Groestlcoin 6th Anniversary Release

Introduction

Dear Groestlers, it goes without saying that 2020 has been a difficult time for millions of people worldwide. The groestlcoin team would like to take this opportunity to wish everyone our best to everyone coping with the direct and indirect effects of COVID-19. Let it bring out the best in us all and show that collectively, we can conquer anything.
The centralised banks and our national governments are facing unprecedented times with interest rates worldwide dropping to record lows in places. Rest assured that this can only strengthen the fundamentals of all decentralised cryptocurrencies and the vision that was seeded with Satoshi's Bitcoin whitepaper over 10 years ago. Despite everything that has been thrown at us this year, the show must go on and the team will still progress and advance to continue the momentum that we have developed over the past 6 years.
In addition to this, we'd like to remind you all that this is Groestlcoin's 6th Birthday release! In terms of price there have been some crazy highs and lows over the years (with highs of around $2.60 and lows of $0.000077!), but in terms of value– Groestlcoin just keeps getting more valuable! In these uncertain times, one thing remains clear – Groestlcoin will keep going and keep innovating regardless. On with what has been worked on and completed over the past few months.

UPDATED - Groestlcoin Core 2.18.2

This is a major release of Groestlcoin Core with many protocol level improvements and code optimizations, featuring the technical equivalent of Bitcoin v0.18.2 but with Groestlcoin-specific patches. On a general level, most of what is new is a new 'Groestlcoin-wallet' tool which is now distributed alongside Groestlcoin Core's other executables.
NOTE: The 'Account' API has been removed from this version which was typically used in some tip bots. Please ensure you check the release notes from 2.17.2 for details on replacing this functionality.

How to Upgrade?

Windows
If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), then run the installer.
OSX
If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), run the dmg and drag Groestlcoin Core to Applications.
Ubuntu
http://groestlcoin.org/forum/index.php?topic=441.0

Other Linux

http://groestlcoin.org/forum/index.php?topic=97.0

Download

Download the Windows Installer (64 bit) here
Download the Windows Installer (32 bit) here
Download the Windows binaries (64 bit) here
Download the Windows binaries (32 bit) here
Download the OSX Installer here
Download the OSX binaries here
Download the Linux binaries (64 bit) here
Download the Linux binaries (32 bit) here
Download the ARM Linux binaries (64 bit) here
Download the ARM Linux binaries (32 bit) here

Source

ALL NEW - Groestlcoin Moonshine iOS/Android Wallet

Built with React Native, Moonshine utilizes Electrum-GRS's JSON-RPC methods to interact with the Groestlcoin network.
GRS Moonshine's intended use is as a hot wallet. Meaning, your keys are only as safe as the device you install this wallet on. As with any hot wallet, please ensure that you keep only a small, responsible amount of Groestlcoin on it at any given time.

Features

Download

iOS
Android

Source

ALL NEW! – HODL GRS Android Wallet

HODL GRS connects directly to the Groestlcoin network using SPV mode and doesn't rely on servers that can be hacked or disabled.
HODL GRS utilizes AES hardware encryption, app sandboxing, and the latest security features to protect users from malware, browser security holes, and even physical theft. Private keys are stored only in the secure enclave of the user's phone, inaccessible to anyone other than the user.
Simplicity and ease-of-use is the core design principle of HODL GRS. A simple recovery phrase (which we call a Backup Recovery Key) is all that is needed to restore the user's wallet if they ever lose or replace their device. HODL GRS is deterministic, which means the user's balance and transaction history can be recovered just from the backup recovery key.

Features

Download

Main Release (Main Net)
Testnet Release

Source

ALL NEW! – GroestlcoinSeed Savior

Groestlcoin Seed Savior is a tool for recovering BIP39 seed phrases.
This tool is meant to help users with recovering a slightly incorrect Groestlcoin mnemonic phrase (AKA backup or seed). You can enter an existing BIP39 mnemonic and get derived addresses in various formats.
To find out if one of the suggested addresses is the right one, you can click on the suggested address to check the address' transaction history on a block explorer.

Features

Live Version (Not Recommended)

https://www.groestlcoin.org/recovery/

Download

https://github.com/Groestlcoin/mnemonic-recovery/archive/master.zip

Source

ALL NEW! – Vanity Search Vanity Address Generator

NOTE: NVidia GPU or any CPU only. AMD graphics cards will not work with this address generator.
VanitySearch is a command-line Segwit-capable vanity Groestlcoin address generator. Add unique flair when you tell people to send Groestlcoin. Alternatively, VanitySearch can be used to generate random addresses offline.
If you're tired of the random, cryptic addresses generated by regular groestlcoin clients, then VanitySearch is the right choice for you to create a more personalized address.
VanitySearch is a groestlcoin address prefix finder. If you want to generate safe private keys, use the -s option to enter your passphrase which will be used for generating a base key as for BIP38 standard (VanitySearch.exe -s "My PassPhrase" FXPref). You can also use VanitySearch.exe -ps "My PassPhrase" which will add a crypto secure seed to your passphrase.
VanitySearch may not compute a good grid size for your GPU, so try different values using -g option in order to get the best performances. If you want to use GPUs and CPUs together, you may have best performances by keeping one CPU core for handling GPU(s)/CPU exchanges (use -t option to set the number of CPU threads).

Features

Usage

https://github.com/Groestlcoin/VanitySearch#usage

Download

Source

ALL NEW! – Groestlcoin EasyVanity 2020

Groestlcoin EasyVanity 2020 is a windows app built from the ground-up and makes it easier than ever before to create your very own bespoke bech32 address(es) when whilst not connected to the internet.
If you're tired of the random, cryptic bech32 addresses generated by regular Groestlcoin clients, then Groestlcoin EasyVanity2020 is the right choice for you to create a more personalised bech32 address. This 2020 version uses the new VanitySearch to generate not only legacy addresses (F prefix) but also Bech32 addresses (grs1 prefix).

Features

Download

Source

Remastered! – Groestlcoin WPF Desktop Wallet (v2.19.0.18)

Groestlcoin WPF is an alternative full node client with optional lightweight 'thin-client' mode based on WPF. Windows Presentation Foundation (WPF) is one of Microsoft's latest approaches to a GUI framework, used with the .NET framework. Its main advantages over the original Groestlcoin client include support for exporting blockchain.dat and including a lite wallet mode.
This wallet was previously deprecated but has been brought back to life with modern standards.

Features

Remastered Improvements

Download

Source

ALL NEW! – BIP39 Key Tool

Groestlcoin BIP39 Key Tool is a GUI interface for generating Groestlcoin public and private keys. It is a standalone tool which can be used offline.

Features

Download

Windows
Linux :
 pip3 install -r requirements.txt python3 bip39\_gui.py 

Source

ALL NEW! – Electrum Personal Server

Groestlcoin Electrum Personal Server aims to make using Electrum Groestlcoin wallet more secure and more private. It makes it easy to connect your Electrum-GRS wallet to your own full node.
It is an implementation of the Electrum-grs server protocol which fulfils the specific need of using the Electrum-grs wallet backed by a full node, but without the heavyweight server backend, for a single user. It allows the user to benefit from all Groestlcoin Core's resource-saving features like pruning, blocks only and disabled txindex. All Electrum-GRS's feature-richness like hardware wallet integration, multi-signature wallets, offline signing, seed recovery phrases, coin control and so on can still be used, but connected only to the user's own full node.
Full node wallets are important in Groestlcoin because they are a big part of what makes the system be trust-less. No longer do people have to trust a financial institution like a bank or PayPal, they can run software on their own computers. If Groestlcoin is digital gold, then a full node wallet is your own personal goldsmith who checks for you that received payments are genuine.
Full node wallets are also important for privacy. Using Electrum-GRS under default configuration requires it to send (hashes of) all your Groestlcoin addresses to some server. That server can then easily spy on your transactions. Full node wallets like Groestlcoin Electrum Personal Server would download the entire blockchain and scan it for the user's own addresses, and therefore don't reveal to anyone else which Groestlcoin addresses they are interested in.
Groestlcoin Electrum Personal Server can also broadcast transactions through Tor which improves privacy by resisting traffic analysis for broadcasted transactions which can link the IP address of the user to the transaction. If enabled this would happen transparently whenever the user simply clicks "Send" on a transaction in Electrum-grs wallet.
Note: Currently Groestlcoin Electrum Personal Server can only accept one connection at a time.

Features

Download

Windows
Linux / OSX (Instructions)

Source

UPDATED – Android Wallet 7.38.1 - Main Net + Test Net

The app allows you to send and receive Groestlcoin on your device using QR codes and URI links.
When using this app, please back up your wallet and email them to yourself! This will save your wallet in a password protected file. Then your coins can be retrieved even if you lose your phone.

Changes

Download

Main Net
Main Net (FDroid)
Test Net

Source

UPDATED – Groestlcoin Sentinel 3.5.06 (Android)

Groestlcoin Sentinel is a great solution for anyone who wants the convenience and utility of a hot wallet for receiving payments directly into their cold storage (or hardware wallets).
Sentinel accepts XPUB's, YPUB'S, ZPUB's and individual Groestlcoin address. Once added you will be able to view balances, view transactions, and (in the case of XPUB's, YPUB's and ZPUB's) deterministically generate addresses for that wallet.
Groestlcoin Sentinel is a fork of Groestlcoin Samourai Wallet with all spending and transaction building code removed.

Changes

Download

Source

UPDATED – P2Pool Test Net

Changes

Download

Pre-Hosted Testnet P2Pool is available via http://testp2pool.groestlcoin.org:21330/static/

Source

submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

***QTUM CORE 0.19.0.1 RECOMMENDED UPDATE***

Qtum Update - 0.19.0.1 Recommended update
https://github.com/qtumproject/qtum/releases/tag/mainnet-ignition-v0.19.0
https://qtumeco.io/wallet
Qtum 0.19.0.1 Changelog
v0.19.0.1 – Recommended Update: Upgrade to Bitcoin core 0.19.0.1 - Improvements
- v0.19.0.1 - Mainnet Ignition v0.19.0
- Upgrade to bitcoin core 0.19.0.1
- Bug fixes
- Upgrade Qtum core to bitcoin core 0.19.0.1.
- Add utxoRoot to callcontract rpc call transaction receipt. - Update Chinese and Korean translations.
- Update some broken links. Linux Repositories are also updated (Debian, Ubuntu, CentOS, Archlinux, Mint, Raspbian) https://docs.qtum.site/en/qtumrepo/ We have available a bootstrap.dat file for faster sync, more details on https://qtumeco.io/wallet
submitted by Frankrbruno to Qtum [link] [comments]

(Updated) [Staking] Reddcoin Core client GUI wallet on a Raspberry Pi Model 3B

Intro

This thread is an update to my first Reddcoin staking tutorial that was written 7 months ago.
 
The reason for the update
My Reddcoin Core software crashed and became unusable. My Raspberry Pi 3B would lag and freeze, I couldn't stake anymore.
 
Instead of just redoing everything the same way, I wanted to see if I could improve on 3 points:
 
The updates
 
If you would like to tip me
Writing a tutorial like this takes time and effort; tips are appreciated. My Reddcoin address: RqvdnNX5MTam855Y2Vudv7yVgtXdcYaQAW.
     

Overview

 

Steps

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     

Video

https://www.youtube.com/watch?v=Snr5e8bzftI
This video shows how long it takes to start Reddcoin Core.   TL;DR:
     

Extra

Backup
Backup your wallet to prevent losing the RDDs in your wallet! There are two methods to backup, do both. Make new backups if you create a new receiving address!
 
 
   
Boot with only 1 USB drive plugged in:
Make sure only the USB drive (with the swap partition and data partition) is plugged in when you boot up your Raspberry Pi. This to make sure the swap partition (/dev/sda1) is recognized correctly.   If you boot up with multiple USB drives, Lubuntu might see the USB drive with the swap partition as the second drive (instead of the first drive), and ignore the 2 GB swap partition. If this happens, starting Reddcoin can render the Raspberry Pi unresponsive.
   
Connection issues If you have issues syncing the blockchain because you have 0 network connections, please follow the instructions in this thread.
   
Start Reddcoin Core easier
Run a shell script (.sh file), so you can start Reddcoin just by double clicking on an icon on your Desktop.
   
Minimization options
Adjust minimization options, so you can safely press on the X button (the close/exit button on the upper right corner).
   
RealVNC VNC Viewer (client) and VNC Connect (server): To remote connect to the Raspberry Pi, I use VNC Viewer ad VNC Connect from RealVNC.
 
   
Chromium as browser: The updates break Firefox, the browser crashes when you try to run it. Install another browser, Chromium, to solve this issue.
   
Updates / Upgrades
If Software Updater shows up and tells you that there is updated software available, do not install the updates using Software Updater. Use LXTerminal to update Lubuntu.  
     

Credits:

   
Credits in previous tutorial:
submitted by Yavuz_Selim to reddCoin [link] [comments]

[Staking] Reddcoin Core client GUI wallet on a Raspberry Pi Model 3B

This tutorial has been updated: https://www.reddit.com/reddCoin/comments/a0wn1v/updated_staking_reddcoin_core_client_gui_wallet/.
   

Intro

I want to stake Reddcoins on my Raspberry Pi, but there is no easy to install package for the Reddcoin Core client. I found some tutorials (mentioned at the bottom, under 'credits'), but I still struggled to get the result I wanted. It took some small adjustments, but I got the GUI Wallet of Reddcoin Core working on my Raspberry Pi Model 3B. See the steps below. :).
 
If you have any questions or comments, please post a comment in this thread, so others can also benefit from it.
 
If you would like to tip me: RqvdnNX5MTam855Y2Vudv7yVgtXdcYaQAW.
   
Even though Raspbian is the primary OS for the Raspberry Pi, it seems that it's not possible to build and compile the Reddcoin wallet software for Raspbian Stretch. However, I got the wallet compiled using Ubuntu MATE.
     

Overview

     

Steps

 
 
 
 
 
 
 
 
 
 
 
 
 
 
     

Extra

 
 
 
 
     

Credits:

 
Thank you all for sharing your knowledge!
submitted by Yavuz_Selim to reddCoin [link] [comments]

Step by step in staking Redd with Raspberry Pi 3

Before I start, I would like to pay complete credits to these two guys :)
https://www.reddcointalk.org/topic/2679/reddcoin-staking-via-ubuntu-mate-on-raspberry-pi-3-model-b-march-2018 (most of my steps, if not all, are from this link)
https://github.com/joroob/reddcoin/blob/mastedoc/build-arm.md
All the steps I am writing is ABSOLUTELY NECESSARY, please don't try to skip it because I did, and it doesn't work.
step 1: get a Raspberry Pi B https://www.raspberrypi.org/products/#buy-now-modal
step 2: make sure you get proper power supply 5v 2A - the Pi will mine, it will need sufficient power. Regular USB samsung charger will not work.
step 3: get proper micro SD card (SanDisk for example) 32Gb++
step 4: USB + Mouse keyboard
step 5: flash micro SD card with Ubuntu MATE
Download Ubuntu Mate image: https://ubuntu-mate.org/raspberry-pi/
Download Etcher: https://etcher.io
After finishing downloading, use Etcher to write/flash the image on micro SD card
After this, your SD card contains Ubuntu MATE OS.
step 6: Place SD Card into Raspberry Pi 3 and start it up. You should be able to see Ubuntu OS! Congrats!
step 7: Connect to wifi or internet cable (internet is better and faster)
step 8: OPTIONAL - turn off UI OS, so that things will work faster
Open XTerminal:
sudo systemctl disable lightdm.service (to turn UI off) 
in case you want to turn UI on again, run this:
sudo systemctl start lightdm.service (to turn UI on) 
step 9: install all dependencies
sudo apt-get update && sudo apt-get install git build-essential libqt4-dev libprotobuf-dev protobuf-compiler libtool autotools-dev autoconf libssl-dev libboost-all-dev wget pkg-config sudo add-apt-repository ppa:bitcoin/bitcoin sudo apt-get update sudo apt-get install db4.8 sudo apt-get install libminiupnpc-dev sudo apt-get install libqrencode-dev Reboot 
step 10: add additional RAM (sort of) in case the App need it, this is call "Create Swap file"
sudo fallocate -l 1G /swapfile sudo chmod 600 /swapfile sudo mkswap /swapfile sudo swapon /swapfile echo ‘/swapfile none swap sw 0 0’ | sudo tee -a /etc/fstab 
step 11: Build Berkeley Database
wget http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz tar xfvz db-4.8.30.NC.tar.gz cd db-4.8.30.NC cd build_unix ../dist/configure --enable-cxx make sudo make install 
step 11.5: Set BerkeleyDB path
export CPATH="/uslocal/BerkeleyDB.4.8/include" export LIBRARY_PATH="/uslocal/BerkeleyDB.4.8/lib" export LD_LIBRARY_PATH=/uslocal/BerkeleyDB.4.8/lib/ 
step 12: Build Reddcoin Wallet
---download source code ---- only source from joroob/reddcoin will work because some stweak was needed for ARM CPU
cd ~ git clone https://github.com/joroob/reddcoin.git 
---build reddcoin ----
cd reddcoin ./autogen.sh ./configure --with-gui=no --disable-tests cd src make sudo make install 
If you finish this, you are in a great position!!!
step 13: Create reddcoin configuration file
cd ~ mkdir .reddcoin && cd .reddcoin nano reddcoin.conf rpcuser=YOUR OWN USERNAME, YOU DONT NEED TO REMEMBER THIS, MAKE IT AS LONG AS YOU WANT rpcpassword=YOUR OWN PASS WORD, YOU DONT NEED TO REMEMBER THIS, MAKE IT AS LONG AS YOU WANT 
step 14: Use bootstrap
(At this point, you had a running reddcoin daemon, now you can start staking. But syncing the full chain takes long time.)
cd ~/.reddcoin wget https://github.com/reddcoin-project/reddcoin/releases/download/v2.0.1.2/bootstrap.dat.xz xz -d bootstrap.dat.xz 
step 15: start the reddcoin daemon service cd ~/reddcoin/src ./reddcoind -daemon
After this, you can test if the daemon is working, by perform this command: ./reddcoin-cli getblockcount
step 16: if your app is not able to sync, it is probably the firewall issue with OS, run this to allow port 45444 (used by Reddcoin) and redo step 15
sudo iptables -I INPUT 1 -i eth0 -p tcp --dport 45444 -j ACCEPT sudo iptables -A OUTPUT -p tcp --dport 45444 -j ACCEPT 
step 17: open BEER and enjoy! This is a MUST or the daemon will stop working! I am not kidding!
step 18: Actually, i forgot to mention you need to execute this command for the wallet to stake:
reddcoind walletpassphrase $yourpassword 9999999 true 
ADDITIONAL REMARKS:
From my PC: I am using putty to execute the command, winSCP to monitor the file location on raspberry.
Moving Red Coins out of exchange really a big move, start with normal wallet, don't start with this tutorial :) Ever since I move my coins out of exchange, I am free from all of the ups and downs! Really!
So guys and gals, Redd On!
UPDATE 18 Mar: my first stake has arrived after 6 days staking :)
In case you want to tip me: RaF3TeWqgTzAdnaZQffnsxS74dag13zsAY
Edit 1: Format stuff
Edit 2: Add step 18 to execute staking command.
Edit 3: In case you don't want to compile the source code, you can download my compile version here: https://github.com/hieplenet/reddcoin/releases/tag/v2.0.0.0 (but doing this, you should be aware of the risk of me changing source code for my benefit - I don't change any thing, but you should be cautious, this is the internet :) )
submitted by hieplenet to reddCoin [link] [comments]

Reward - Help recovering corrupt wallet.dat /r/Bitcoin

Reward - Help recovering corrupt wallet.dat /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Just had a virus try to steal (ended up hidden) my bitcoins in Electrum...under Linux...

Been running linux mint and there is a lot of strange activity watching the firewall (got it on near lockldown). I had to boot into another linux so that i could scan around and eventually by luck, i found my wallet.dat file but it was somewhere far into the root of the drive, locked. 'Files haven been locking, and it has been obvious someone has been able to control my computer remotely. I thought this only happened with windows?
I recovered the money and am now investigating what it could have been, a bug in ubuntu/mint leaving VNC on all day?
I was going to Install Debian last night and the thing hanged probably couldn't handle some generic drivers....
I want something secure and stable and a firewall that works (i could see the person executing a command in /usr to enable variuous firewall options, as i closed them)
Any idea's? I can post up some of the code in the replies some of it loos sophisticated and its writtenin python. Lots of python code, and lots of bitcoin searching.
submitted by radio879 to Bitcoin [link] [comments]

Lost most of my Doge late 2013. There may be one last solution to getting some back. Does anyone have a copy of "DogeCoin version v0.6.4.0-unk-beta" or know which release it is directly linked to?

My keys corrupted and i didn't have a recent backup, after the upgrade lost all the doges.

I think there might be one more hope of finding some, and would appreciate if anyone knows which version " v0.6.4.0-unk-beta" which is on the debug.log output.

Noticed after all this time after digging through Bitcoin release notes that before bip32/hd wallets came in or as a matter of fact As they came in too (thanks devs). Most if not everyone i asked thought backing up the wallet.dat file is good enough, or the old --salvagewallet nor -zapwalletxes. They either aggressively scrambled the wallet making it more likely destroy even more keys, sure saved a few coins but most of the addresses in the keypool which has a size of 100 didn't have a corresponding private key anywhere in the wallet AFAIKT,
Sorry before i rant, i just need some info on if this wallet if linked to a specific Dogecoin version and just happens to say v0.6.4.0 in the debug log file.

I can't update directly to any other version without the wallet breaking up. Apparently i need the exact version that was last used, and turn it off extra safely so the log files which hold some parts of the keys go back to the Wallet.dat or something.

I tried all solutions, this might just work. from the "Bitcoin version 0.7.1 Readme file."
How to Upgrade
If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), then run the installer (on Windows) or just copy over /Applications/Bitcoin-Qt (on Mac) or bitcoind/bitcoin-qt (on Linux).
If you were running on Linux with a version that might have been compiled with a different version of Berkeley DB (for example, if you were using an Ubuntu PPA version), then run the old version again with the -detachdb argument and shut it down; if you do not, then the new version will not be able to read the database files and will exit with an error.
Explanation of -detachdb (and the new “stop true” RPC command): The Berkeley DB database library stores data in both “.dat” and “log” files, so the database is always in a consistent state, even in case of power failure or other sudden shutdown. The format of the “.dat” files is portable between different versions of Berkeley DB, but the “log” files are not– even minor version differences may have incompatible “log” files. The -detachdb option moves any pending changes from the “log” files to the “blkindex.dat” file for maximum compatibility, but makes shutdown much slower. Note that the “wallet.dat” file is always detached, and versions prior to 0.6.0 detached all databases at shutdown.
or on shut down the coin client using the -detatchdb comas coins use both log and dat files with berkeley.

Thanks,

D_M


submitted by doge_messiah to dogecoin [link] [comments]

Dogecoin on Linux - The Complete Beginner's Guide

I'm writing this because I couldn't find a single condensed guide on compiling the wallet and running mining software on linux, specficially Ubuntu/Linux Mint. I combed Bitcoin and Litecoin forums for similar problems I was running into and eventually got everything nailed down, so here it is in one place, for new Shibes.
If you want to make a Dogecoin directory in your downloads folder to keep things organized, you will need to modify these commands to refelct the change. So instead of going to ~/Downloads/ you will need to go to ~/Downloads/Dogecoin and be sure to put the zipped files there when you download them, but the commands will be the same otherwise.
cwayne18 put in the work to make a PPA for the QT client here.
Ubunutu/Mint/Debian users should be able to install the client with the following commands:
sudo add-apt-repository ppa:cwayne18/doge sudo apt-get update && sudo apt-get install dogecoin-qt 
To update using this method, run
sudo apt-get update && sudo apt-get upgrade dogecoin-qt 
Compiling the Wallet Manually
I suggest using the PPA above, but if you want to compile manually, here you go.
1)Download the newest source from here. If you want to check out the Github page, click here
2)Unzip the package with the native client OR, navigate to your downloads and unzip
cd ~/Downloads unzip dogecoin-master.zip 
3)Now it's time to compile. You will need to install the dependencies, just copy and paste the following code. It will be a fairly large download and could take some time. It is always important to update before installing any new software, so we'll do that first and then install the dependencies.
sudo apt-get update sudo apt-get upgrade sudo apt-get install libssl-dev libdb-dev libdb++-dev libqrencode-dev qt4-qmake libqtgui4 libqt4-dev sudo apt-get install libminiupnpc-dev libminiupnpc8 libboost-all-dev build-essential git libboost1.53-all-dev 
4)Once that is done, go to the doge-coin master directory and compile:
cd ~/Downloads/dogecoin-maste sed -i 's/-mgw46-mt-sd-1_53//g' dogecoin-qt.pro qmake USE_UPNP=- USE_QRCODE=0 USE_IPV6=0 make -j3 
After running the qmake command you will likely see some text similar to
Project MESSAGE: Building without UPNP support Project MESSAGE: Building with UPNP supportRemoved plural forms as the target language has less forms. If this sounds wrong, possibly the target language is not set or recognized. 
It's perfectly normal, so don't worry about that.
Your Dogewallet is ready to go! The executable is in ~/Downloads/dogecoin-maste and called dogecoin-qt. Your wallet information is in ~/.dogecoin. You can run the wallet at any time by opening terminal and typing
cd ~/Downloads/dogecoin-maste ./dogecoin-qt 
Future upgrades to dogewallet are easy. Back up your wallet.dat, and simply follow the same directions above, but you'll be unzipping and building the newer version. You will likely need to rename the old dogecoin-master directory in ~/Downloads before unzipping the newest version and building. Also, it is likely that you will not need to install the dependencies again.
Alternate Method For Installing Dogecoin Wallet from Nicebreakfast
After installing the dependencies listed in step 3, open terminal, then navigate to where you want Dogecoin Wallet stored and run:
git clone https://github.com/dogecoin/dogecoin ./autogen.sh ./configure make 
then when the wallet is updated just run
git pull 
from the dogecoin directory.
GPU Mining
GPU mining requires CGminer. My suggestion is to get the executable already built. The creator of cgminer has removed the built file from his website, but I've uploaded it here
sudo apt-get install pkg-config opencl-dev libcurl4-openssl-dev autoconf libtool automake m4 ncurses-dev cd ~/Downloads tar -xvf cgminer-3.7.2-x86_64-built.tar.bz2 
Don't use anything newer than 3.7.2. The newer versions of CGMiner don't support GPU mining.
That's it! You have cgminer ready to go! You will run cgminer with the following syntax
cd ~/Downloads/cgminer-3.7.2-x86_64-built/ ./cgminer --scrypt -o stratum+tcp://SERVERNAME:PORT -u WORKER.ID -p PASS 
A good guide for fine tuning cgminer can be found here; follow the litecoin example.
EDIT
I had trouble getting cgminer running with a single line command, but running it via an executable .sh file works. This is covered in the cgminer setup guide I posted above but I'll put it here too. In the same directory that has the cgminer executable, you need to make a file called cgminer.sh and make it executable. It should contain the follwing:
export GPU_USE_SYNC_OBJECTS=1 export GPU_MAX_ALLOC_PERCENT=100 export DISPLAY=:0 find *.bin -delete sleep 5 ./cgminer 
Then you can call cgminer in terminal by doing ./cgminer.sh You will need a cgminer.conf file containing all your options. All of this is covered in the guide that is linked above.
A quick note about AMD drivers: They used to be a huge PITA to install and get working, but the newest Catalyst drivers are great. There's a GUI installer, everything works out of the box, and there is a lot of documentation. You can download them here: AMD Catalyst 14.6 Beta Linux
CPU Mining
For CPU mining I use minerd because it doesn't require any work to get running, simply download it and get to work. Download the built file for your machine 32-bit or 64-bit, and then unzip it and you're ready to go!
cd ~/Downloads tar -xvf pooler-cpuminer-2.3.2-linux-x86.tar.gz 
The executable is called minerd and it will be in ~/Downloads but you can move it to wherever you like. To run it, pull up terminal and do
cd ~/Downloads minerd --url=stratum+tcp://SERVER:PORT --userpass=USERNAME.WORKERNAME:WORKERPASSWORD 
You're done! Happy mining!
Common Issues
I ran into this and I've seen others with this problem as well. Everything installs fine but there is a shared library file that isn't where it should be. In fact, it isn't there at all.
 libudev.so.1: cannot open shared object file: No such file or directory 
In terminal, do
sudo updatedb locate libudev.so.0.13.0 
And it will probably return a path /lib/x86_64-linux-gnu. Inside that directory there's a library file called libudev.so.0.13.0. You'll need to make a symlink (aka shortcut) that links libudev.so.1 to libudev.so.0.13.0 So, assuming you're working with libudev.so.0.13.0 do this
cd /lib/x86_64-linux-gnu sudo ln -s libudev.so.0.13.0 libudev.so.1 
Now if you do
ln -l 
You should see
libudev.so.1 -> ./libudev.so.0.13.0 
Meaning you've made the symlink. Also, the text for libudev.so.1 will be blue.
submitted by Boozybrain to dogecoin [link] [comments]

New to Ðogecoin?

Ðogecoin is a community friendly crypto-currency. Very similar to Bitcoin, but with a more noob-friendly and welcoming community. Be sure to check the sidebar - Being a new shibe though, you may be better served with a reddit-style self-post.
To do the special Ð character, hold alt and type 0208.
To do the special Ð character on Ubuntu 12.04: Ctrl + Shift + U; then type 00D0; finally press enter for Ð (Starkythefox)
To do the special Ð via HTML: & ETH; (no space) (cdeverett)
Do not expect to make a fortune in Ðogecoin. A Ðoge is worth about 0.00052 cents USD. The fact it has gotten so popular shocked even the creators, so consider Dogecoin your 'fuck around' cryptocurrency: You can afford to make mistakes while you learn.
What is a shibe? - A useholder of Dogecoin
What is this about the moon? - A lot of other cryptocurrencies including bitcoin expect the price of their coins to appreciate to the point they can buy huge mansions in which to store all their smaller mansions and little gold statues of other mansions. Shibes know the price of Ðogecoin will go to the moon. (Warning: Moon is not a tangible number. Heating in your house may be turned off if you attempt to pay in dogecoin)
Don't use an online wallet - Download the wallet program directly to your computer. You'll have full control and prevent leaving your Ðoge in the hands of strangers.
Sign up with a pool and try to mine some coin for yourself. Even if your computer sucks! It feels great when you see some mined coin pop up in your wallet.
Seriously. Try mining! Mining can be a bit daunting to begin with, but its very rewarding and you'll have a much better grasp of the beginning to end of how cryptocurrency works. (Unless you are using GUIMiner, you'll have to create a .bat file with your settings. Search/ask this subreddit if you get stuck)
Earning Ðogecoin Outside of mining - It's easy to earn Ðogecoin in the /dogecoin subreddit(s). Post something helpful or create funny content, you'll get tipped. Want to offer a silly service? check out /shibemarket/ (I bought reasons Mario Kart can suck my dick for 227 doges a pop a while back.) Hell, you can even beg or buy some.
Tipping: - Send a message to both tip bots to register so you can give and receive tips. The bots are so_doge_tip and dogetipbot. Send them each a message that says +register. It might take a while to get a response, but once you do you are ready to go.
Gambling: - What, is the emotional rollercoaster of a non-government backed, untested digital currency with all the worries of a pennystock and complications of FOREX not wild enough for you? I've seen a lot of people posting newly discovered gambling problems with this new found technology. You are best to avoid it. If you're looking to make money and are counting on Ðogecoin to make that happen - Just keep mining or buy in small, regular increments. The house always wins.
Faucets: (Thanks vidarino) Free dogecoin to get you started! You can get a very small bit of free Dogecoin in your wallet by inputting your receiving address into one of the faucets listed in the sidebar. Once you have some Ðoge of your very own, be sure to tip the faucets to help spread Ðoge to others! Don't be greedy and totally drain the faucets - they have very little and run on donations
http://dogefaucet.tk/ - No longer working
http://bartstuff.eu/doge/doge2.php - No longer working
http://freedoge.we-mine.it/ - No longer working
Where is your wallet.dat On win7 you can find that here: C:\Users\owner\AppData\Roaming\DogeCoin
Finally - /dogecoin is all about tipping, helping new shibes out, and posting memes and image macros.
Edit: Added note about gambling
Edit 2: Added note about faucets
submitted by sns_abdl to dogecoin [link] [comments]

Dogecoin Stack Exchange Day 26 : Sabotage

On Saturday we had 20 questions with a score of ten or more.
Today we have 10 questions with a score of ten or more.
https://area51.stackexchange.com/proposals/110056
None of the dogecoin stack followers have downvoted any questions. Maybe an external moderator downvoted questions in the proposal? Or a group of people decided to wihdraw their votes? Why? Such scare! Very conspir.. plz up.!
Status 69 Followers 10 questions with a score of 10 or more
*Required to start comittment phase
20 more questions with a score of 10 or more
A lot of followers haven't voted, if you haven't voted, plz vote. If you haven't signed up, plz sign.
Current Question List
Question Votes
How can I setup a Dogecoin wallet? 14
What are the best ways to back up my wallet? 12
What is "cold storage"? Why is it better for long-term holding? 11
How can I buy Dogecoin? 11
I am trying to install dogecoin core on ubuntu how do i install the dependancies? 10
How can Dogecoin be used outside of Internet transactions? 10
How can I "bootstrap" to speed up the process of syncing up with the Dogecoin blockchain? 10
How can I sell my stuff for dogecoins? 10
Can an old, unencrypted core wallet backup be used to move dogecoins out of that same wallets currently encrypted core wallet? 10
How does merged mining work with litecoin? 10
How do I backup my wallet, and how do I restore form the backup? 9
How to setup a dogecoin public node? 9
How do I get dogecoins? 9
What is a public node? 9
How do i import a existing wallet.dat file from a previous dogecoin installation 9
Why are online wallets considered bad? 9
What would happen to the dogecoin hash rate if litecoin became unpopular? 9
How long does it take for the dogecoin wallet to sync with the dogecoin blockchain? 9
Where can I buy things with doge? 9
How do Dogecoin transaction fees work? 8
What is Dogecoin mining, and how do I begin? 7
Is there a way to tip videos on youtube with dogecoin? 4
Is there a limit on how many Dogecoins can ever be mined/exist? 3
What price would dogecoin need to be in order for the mining rewards to cover the cost of electricity? 3
What is "sweeping" from one wallet to another and why is it important? 1
How can Dogecoin avoid the long transaction wait times and high fees that Bitcoin is currently experiencing? 1
What is the best (most efficient) way to mine Doge? 1
How do I set up Dogecoinfold? 1
What are three reasons to use Dogecoin that the average, non-technical user would find compelling? 1
Is it possible to have two Dogecoin core wallets running on the same computer at the same time? 1
Is there a roadmap for Dogecoin's future? 0
Who are the devs? 1
What exactly is a shibe? 1
How can we help to boost DogeCoin as an accepted Currency? 1
Can I recover my dogecoins if I accidentally have deleted my wallet? 1
What is it about the Dogecoin community that makes it so wow? 1
What happened to the dogecoin foundation? 0
Who owns and runs the dogecoin.com website? 0
Does segregated witness implementation reduce traceability on the blockchain? 0
What is the purpose of cryptocurrency? 0
Can I mine dogecoin on my laptop? 0
What programming language is used for the dogecoin core? 0
Let's go
... to the moooon!
edit This back from Stack Exchange
User does not have to follow the proposal in order to vote on the sample questions. As the faq says, any user with 150 rep on Area 51 can downvote any example question.
So we're being sabotaged and we don't even know who is doing it... At least three people and none are followers. Such sad, very disappoint.
FWIW: https://meta.stackexchange.com/questions/297329/proposal-questions-downvoted-by-anonymous
submitted by mcsen2163 to dogecoin [link] [comments]

Bitcoin ABC corrupted wallet.dat ...

Hello,
I switched a month ago on BCH (I'm a miner). I use the Bitcoin ABC client on ubuntu 16.04 for my transaction, today I decided to encrypted my wallet and save it on a usb key.
After the encryption I send 0.20 $ to another address (0.05$ fee, comfirmation in 3 min) and put my new password: everything fine.
Then I opened the .Bitcoin location to copy/past the wallet.dat on my USB : error permission (I tried on the desk, same error). I used the command sudo nautilus: same error. I rebooted my Linux and tried again : same error.
I opened Bitcoin ABC : ERROR wallet.dat corrupted...
I reboot and can't read my wallet or move it :/
Edit 23:18 : I successfully opened it (did nothing more) I'll send everything on another wallet to figure out if I can move it or re-open it after
Last EDIT : problem fixed, thanks :)
submitted by caepri43 to btc [link] [comments]

Extract keys from old wallet.dat

Years back I installed bitcoin QT (I think) and bought around .1BTC. I spent most of it, but I think there's some left, I kept the wallet .dat after I deleted the client.
Is there any easy way to extract the keys so I can import them into exodus? I'm on Ubuntu, but I have access to a windows machine if necessary. Also I'd rather not download the whole blockchain.
submitted by doorstop_scraper to BitcoinBeginners [link] [comments]

HD address generation seems to work in bitcoin 0.13.0rc1 :-)

"The only people who should be running fully synchronizing nodes are miners and businesses and uber-geeks like theymos who enjoy fiddling with technology."
Gavin Andresen
Compiled bitcoin-0.13.0rc1 from source on Ubuntu.
Like in older versions, there was no menu visible in bitcoin-qt (it was in the binaries) but I finally solved it through:
sudo apt-get remove appmenu-qt5
I then added the following code:
https://github.com/bitcoin/bitcoin/pull/8206/files
so I could dump the extended private master key (xprv....)
and recompiled.
To dump the wallet (that here includes the master key):
In bitcoin-qt: click help, then choose console
walletpassphrase passphrasehere 60
dumpwallet filename
I then checked some of the addresses generated in bitcoin-qt here:
https://github.com/bip32JP/bip32.github.io
Substituting the BIP32 Extended Key and using:
Custom Path: m/0'/0'/0' (for the first address, etc.)
THEY AGREED!
(edit: and also the private keys)
Thanks, core developers and especially:
Jonas Schnelli
It's nice not having to worry anymore if the backup of your (encrypted) wallet.dat file has become outdated.
submitted by sumBTC to Bitcoin [link] [comments]

Secure paper wallet tutorial

This is my handout for paranoid people who want a way to store bitcoin safely. It requires a little work, but this is the method I use because it should be resistant to risks associated with:
  1. Bad random number generators
  2. Malicious or flawed software
  3. Hacked computers
If you want a method that is less secure but easier, skip to the bottom of this post.
The Secure Method
  1. Download bitaddress.org. (Try going to the website and pressing "ctrl+s")
  2. Put the bitaddress.org file on a computer with an operating system that has not interacted with the internet much or at all. The computer should not be hooked up to the internet when you do this. You could put the bitaddress file on a USB stick, and then turn off your computer, unplug the internet, and boot it up using a boot-from-CD copy of linux (Ubuntu or Mint for example). This prevents any mal-ware you may have accumulated from running and capturing your keystrokes. I use an old android smart phone that I have done a factory reset on. It has no sim-card and does not have the password to my home wifi. Also the phone wifi is turned off. If you are using a fresh operating system, and do not have a connection to the internet, then your private key will probably not escape the computer.
  3. Roll a die 62 times and write down the sequence of numbers. This gives you 2160 possible outcomes, which is the maximum that Bitcoin supports.
  4. Run bitaddress.org from your offline computer. Input the sequence of numbers from the die rolls into the "Brain Wallet" tab. By providing your own source of randomness, you do not have to worry that the random number generator used by your computer is too weak. I'm looking at you, NSA ಠ_ಠ
  5. Brain Wallet tab creates a private key and address.
  6. Write down the address and private key by hand or print them on a dumb printer. (Dumb printer means not the one at your office with the hard drive. Maybe not the 4 in 1 printer that scans and faxes and makes waffles.) If you hand copy them you may want to hand copy more than one format. (WIF and HEX). If you are crazy and are storing your life savings in Bitcoin, and you hand copy the private key, do a double-check by typing the private key back into the tool on the "Wallet Details" tab and confirm that it recreates the same public address.
  7. Load your paper wallet by sending your bitcoin to the public address. You can do this as many times as you like.
  8. You can view the current balance of your paper wallet by typing the public address into the search box at blockchain.info
  9. If you are using an old cell phone or tablet do a factory reset when you are finished so that the memory of the private keys is destroyed. If you are using a computer with a boot-from-CD copy of linux, I think you can just power down the computer and the private keys will be gone. (Maybe someone can confirm for me that the private keys would not be able to be cached by bitaddress?)
  10. To spend your paper wallet, you will need to either create an offline transaction, or import the private key into a hot wallet. Creating an offline transaction is dangerous if you don't know what you are doing. Importing to a client side wallet like Bitcoin-Qt, Electrum, MultiBit or Armory is a good idea. You can also import to an online wallet such as Blockchain.info or Coinbase.
Trusting bitaddress.org
The only thing you need bitaddress.org to do is to honestly convert the brainwallet passphrase into the corresponding private key and address. You can verify that it is doing this honestly by running several test passphrases through the copy of bitaddress that you plan on using, and several other brainwallet generators. For example, you could use the online version of bitaddress, and brainwallet and safepaperwallet and bitcoinpaperwallet. If you are fancy with the linux command line, you can also try "echo -n my_die_rolls | sha256sum". The linux operating system should reply with the same private key that bitaddress makes. This protects you from a malicious paper wallet generator.
Trusting your copy of bitaddress.org
Bitaddress publishes the sha1 hash of the bitaddress.org website at this location:
https://www.bitaddress.org/pgpsignedmsg.txt
The message is signed by the creator, pointbiz. I found his PGP fingerprint here:
https://github.com/pointbiz/bitaddress.org/issues/18
"527B 5C82 B1F6 B2DB 72A0 ECBF 8749 7B91 6397 4F5A"
With this fingerprint, you can authenticate the signed message, which gives you the hash of the current bitaddress.org file. Then you can hash your copy of the file and authenticate the file.
I do not have a way to authenticate the fingerprint itself, sorry. According to the website I linked to, git has cryptographic traceability that would enable a person to do some research and authenticate the fingerprint. If you want to go that far, knock yourself out. I think that the techniques described in this document do not really rely on bitaddress being un-corrupt. Anyway, how do we know pointbiz is a good guy? ;-)
There are a lot of skilled eyes watching bitaddress.org and the signed sha1 hash. To gain the most benefit from all of those eyes, it's probably worthwhile to check your copy by hashing it and comparing to the published hash.
"But we aren't supposed to use brainwallets"
You are not supposed to use brainwallets that have predictable passphrases. People think they are pretty clever about how they pick their passphrases, but a lot of bitcoins have been stolen because people tend to come up with similar ideas. If you let dice generate the passphrase, then it is totally random, and you just need to make sure to roll enough times.
How to avoid spending your life rolling dice
When I first started doing this, I rolled a die 62 times for each private key. This is not necessary. You can simply roll the die 62 times and keep the sequence of 62 numbers as a "seed". The first paper address you create would use "my die rolls-1" as the passphrase, the second would be "my die rolls-2" and so on. This is safe because SHA256 prevents any computable relationship between the resulting private key family.
Of course this has a certain bad security scenario -- if anyone obtains the seed they can reconstruct all of your paper wallets. So this is not for everyone! On the other hand, it also means that if you happen to lose one of your paper wallets, you could reconstruct it so long as you still had the seed.
One way to reduce this risk is to add an easy to remember password like this: "my die rolls-password-1".
If you prefer, you can use a technique called diceware to convert your die rolls to words that still contain the same quantity of entropy, but which could be easier to work with. I don't use diceware because it's another piece of software that I have to trust, and I'm just copy/pasting my high entropy seed, so I don't care about how ugly it is.
Why not input the dice as a Base 6 private key on the Wallet Details tab?
Two reasons. First of all, this option requires that you roll the die 99 times, but you do not get meaningful additional protection by rolling more than 62 times. Why roll more times if you don't have to? Second, I use the "high entropy seed" method to generate multiple private keys from the same die rolls. Using the Base 6 option would require rolling 99 times for every private key.
I'm a big nerd with exotic dice. How many times to roll?
Put this formula in Excel to get the number of times to roll: "=160*LOG(2,f)" where f = number of faces on the die. For example, you would roll a d16 40 times. By the way, somewhat unbelievably casino dice are more fair than ordinary dice
The "Change address" problem:
You should understand change addresses because some people have accidentally lost money by not understanding it.
Imagine your paper wallet is a 10 dollar bill. You use it to buy a candy bar. To do this you give the cashier the entire 10 dollar bill. They keep 1 dollar and give you 9 dollars back as change.
With Bitcoin, you have to explicitly say that you want 9 dollars back, and you have to provide an address where it should go to. If you just hand over the 10 dollar bill, and don't say you want 9 dollars back, then the miner who processes the transaction gives 1 dollar to the store and keeps the remainder themselves.
Wallet software like Bitcoin-Qt handles this automatically for you. They automatically make "change addresses" and they automatically construct transactions that make the change go to the change address.
There are three ways I know of that the change problem can bite you:
  1. You generate a raw transaction by hand, and screw up. If you are generating a transaction "by hand" with a raw transaction editor, you need to be extra careful that your outputs add up to the same number as your inputs. Otherwise, the very lucky miner who puts your transaction in a block will keep the difference.
  2. You import a paper wallet into a wallet software and spend part of it, and then think that the change is in the paper wallet. The change is not in the paper wallet. It is in a change address that the wallet software generated. That means that if you lose your wallet.dat file you will lose all the change. The paper wallet is empty.
  3. You import a paper wallet into a wallet software and spend part of it, and then think that the change is in the change address that the wallet software generated. If the transaction did not need to consume all of the "outputs" used to fund the paper wallet, then there could be some unspent outputs still located at the address of the paper wallet. If you destroyed the paper wallet, and destroyed the copy of the private key imported to the wallet software, then you could not access this money. (E.g. if you restored the software wallet from its seed, thinking all of the money was moved to the wallet-generated change addresses.)
For more on this, see here
The hot paper wallet problem
Your bitcoin in your paper wallet are secure, so long as the piece of paper is secure, until you go to spend it. When you spend it, you put the private key onto a computer that is connected to the internet. At this point you must regard your paper wallet address as hot because the computer you used may have been compromised. It now provides much less protection against theft of your coins. If you need the level of protection that a cold paper wallet provides, you need to create a new one and send your coins to it.
Destroying your paper wallet address
Do not destroy the only copy of a private key without verifying that there is no money at that address. Your client may have sent change to your paper wallet address without you realizing it. Your client may have not consumed all of the unspent outputs available at the paper wallet address. You can go to blockchain.info and type the public address into the search window to see the current balance. I don't bother destroying my used/empty paper wallet addresses. I just file them away.
Encrypting your private key
BIP 0038 describes a standardized way to encrypt your paper wallet private key. A normal paper wallet is vulnerable because if anyone sees the private key they can take the coins. The BIP38 protocol is even resistant to brute force attacks because it uses a memory intensive encryption algorithm called scrypt. If you want to encrypt your wallets using BIP38, I recommend that you use bitcoinpaperwallet because they will let you type in your own private key and will encrypt it for you. As with bitaddress, for high security you should only use a local copy of this website on a computer that will never get connected to the internet.
Splitting your private key
Another option for protecting the private key is to convert it into multiple fragments that must be brought together. This method allows you to store pieces of your key with separate people in separate locations. It can be set up so that you can reconstitute the private key when you have any 2 out of the 3 fragments. This technique is called Shamir's Secret Sharing. I have not tried this technique, but you may find it valuable. You could try using this website http://passguardian.com/ which will help you split up a key. As before, you should do this on an offline computer. Keep in mind if you use this service that you are trusting it to work properly. It would be good to find other independently created tools that could be used to validate the operation of passguardian. Personally, I would be nervous destroying the only copy of a private key and relying entirely on the fragments generated by the website.
Looks like Bitaddress has an implementation of Shamir's Secret Sharing now under the "Split Wallet" tab. However it would appear that you cannot provide your own key for this, so you would have to trust bitaddress.
Durable Media
Pay attention to the media you use to record your paper wallet. Some kinds of ink fade, some kinds of paper disintegrate. Moisture and heat are your enemies.
In addition to keeping copies of my paper wallet addresses I did the following:
  1. Order a set of numeric metal stamps. ($10)
  2. Buy a square galvanized steel outlet cover from the hardware store ($1)
  3. Buy a sledgehammer from the hardware store
  4. Write the die rolls on the steel plate using a sharpie
  5. Use the hammer to stamp the metal. Do all the 1's, then all the 2's etc. Please use eye protection, as metal stamp may emit sparks or fly unexpectedly across the garage. :-)
  6. Use nail polish remover to erase the sharpie
Electrum
If you trust electrum you might try running it on an offline computer, and having it generate a series of private keys from a seed. I don't have experience with this software, but it sounds like there are some slick possibilities there that could save you time if you are working with a lot of addresses.
Message to the downvoters
I would appreciate it if you would comment, so that I can learn from your opinion. Thanks!
The Easy Method
This method is probably suitable for small quantities of bitcoin. I would not trust it for life-altering sums of money.
  1. Download the bitaddress.org website to your hard drive.
  2. Close your browser
  3. Disconnect from the internet
  4. Open the bitaddress.org website from your hard drive.
  5. Print a paper wallet on your printer
  6. Close your browser
submitted by moral_agent to BitcoinWallet [link] [comments]

Help Troubleshooting Bitcoin Code Full Node

Hi guys, I'm having a problem running my Bitcoin Core full node. If anyone can help me that would be amazing. I'll try my best to give all the details.
2017-11-05 11:50:54 Bitcoin version v0.15.0.1
2017-11-05 11:50:54 InitParameterInteraction: parameter interaction: -whitelistforcerelay=1 -> setting -whitelistrelay=1
2017-11-05 11:50:54 Assuming ancestors of block 0000000000000000003b9ce759c2a087d52abc4266f8f4ebd6d768b89defa50a have valid signatures.
2017-11-05 11:50:54 Using the 'standard' SHA256 implementation
2017-11-05 11:50:54 Using RdRand as an additional entropy source
2017-11-05 11:50:54 Default data directory /home/darius/.bitcoin
2017-11-05 11:50:54 Using data directory
2017-11-05 11:50:54 Using config file bitcoin.conf
2017-11-05 11:50:54 Using at most 125 automatic connections (1024 file descriptors available)
2017-11-05 11:50:54 Using 16 MiB out of 32/2 requested for signature cache, able to store 524288 elements
2017-11-05 11:50:54 Using 16 MiB out of 32/2 requested for script execution cache, able to store 524288 elements
2017-11-05 11:50:54 Using 4 threads for script verification
2017-11-05 11:50:54 scheduler thread start
2017-11-05 11:50:54 libevent: getaddrinfo: address family for nodename not supported
2017-11-05 11:50:54 Binding RPC on address ::1 port 8332 failed.
2017-11-05 11:50:54 HTTP: creating work queue of depth 16
2017-11-05 11:50:54 Config options rpcuser and rpcpassword will soon be deprecated. Locally-run instances may remove rpcuser to use cookie-based auth, or may be replaced with rpcauth. Please see share/rpcuser for rpcauth auth generation.
2017-11-05 11:50:54 HTTP: starting 4 worker threads
2017-11-05 11:50:54 init message: Verifying wallet(s)...
2017-11-05 11:50:54 Using BerkeleyDB version Berkeley DB 4.8.30: (April 9, 2010)
2017-11-05 11:50:54 Using wallet wallet.dat
2017-11-05 11:50:54 CDBEnv::Open: LogDir=database ErrorFile=db.log
2017-11-05 11:50:54 Cache configuration:
2017-11-05 11:50:54 * Using 56.2MiB for block index database
2017-11-05 11:50:54 * Using 8.0MiB for chain state database
2017-11-05 11:50:54 * Using 385.8MiB for in-memory UTXO set (plus up to 286.1MiB of unused mempool space)
2017-11-05 11:50:54 init message: Loading block index...
2017-11-05 11:50:54 Opening LevelDB in blocks/index
2017-11-05 11:50:54 IO error: blocks/index/LOCK: Permission denied
2017-11-05 11:50:54 Database I/O error
2017-11-05 11:50:54 : Error opening block database.
Please restart with -reindex or -reindex-chainstate to recover.
: Error opening block database.
Please restart with -reindex or -reindex-chainstate to recover.
2017-11-05 11:50:54 Aborted block database rebuild. Exiting.
2017-11-05 11:50:54 scheduler thread interrupt
2017-11-05 11:50:54 Shutdown: In progress...
2017-11-05 11:50:54 Shutdown: done
submitted by KomodoDragonJesus to Bitcoin [link] [comments]

Safex FAQ #2 The Wallet

FAQ #1 General Questions
FAQ #2 The Wallet
FAQ #3 Timeframes, Chille Dividends, Dividend Calculator:
FAQ #4 The Marketplace, Trade Volumes, Market Cap, Partnerships/Publicity, Miscellaneous
Wallet:
1. Is there a software, paper, online wallet?
There is a Mac, Windows, and Ubuntu Linux wallet which can be downloaded from https://safex.io/ . For security there is no online wallet.
There is a paper wallet available https://safex.io/keys Dan has stated that if you keep you coins in the software wallet and don’t send from there, and keep your keys safe, then it is very secure.
2. Should I keep my coins on the exchange?
In general if you plan to hold it is better to transfer to the software wallet. Better to have control of your own keys.
3. How do I transfer my coins from Bittrex to my wallet?
Check the tutorial Or this post
4. I transferred my coins to my wallet from Bittrex but it is taking a long time, is this normal?
Depending on blockchain traffic it can take some time. I would only start to make enquiries if it has been more than 36 hours.
5. How do I transfer coins from my wallet to another address?
Please see the wallet tutorial
6. Why do I need BTC in my wallet to transfer my coins?
Currently Safex coins reside on the bitcoin blockchain so every time you send coins from any address to address there is a “mining” fee. This is not unique to Safex, and you pay fees to send any coin (try sending some BTC and you will see). In the future we will migrate to the chille blockchain where we expect fees would be lower. https://www.youtube.com/watch?v=Z7a2XL8EfGw
7. Why is there a small amount of BTC in my wallet when I transfer Safex there?
This is needed since we are on the bitcoin blockchain (the value is very small).
8. My virus scanner / malware detector won’t let me install the wallet, why?
We are currently waiting on signing keys from Apple (we have from Microsoft). This will be corrected in the next wallet update (in October).
9. How can I secure my wallet/keys?
Great question, very important. In short, once you have transferred safex to your wallet you need to export your private keys, print them out, and hide them where no one else will find them. You can also export an excrypted wallet.dat file from which you can rebuild your wallet (you will need to remember your wallet password). Daniel has a good video
submitted by znffal to safex [link] [comments]

Bitcoin built with a newer Berkeley Database incompatible with a older wallet?

Is a Bitcoin client built with a newer Berkeley Database incompatible with a wallet file from a older client? Or is it that a wallet made from a newer Berkeley Database not compatible with an older client?
What I'm trying to figure out... If I have a wallet from years ago and I import it into a newer client that was built with a different Berkeley database unknowingly would I have any issues?
EDIT: The reason I ask is because I run Arch Linux and I recently found out their Bitcoin builds against whatever BDB version they have. I might have tried wallet.dat files from a old Ubuntu build years ago. What I remember is that the wallet.dat file loaded and told me I had a wallet address but that it was empty, At the time I was certain that the blockchain was fully synced so I deleted the wallet file believing them to be empty.
submitted by ShapeShifter499 to Bitcoin [link] [comments]

125 BTC Balance Wallet Dat file Password Lost Help me to Find Get Bitcoin Wallet In Linux Mint ( Ubuntu ), No Installation Required Wallet dat With balance 131 and 50 BTC help us to open it Wallet.dat With balance 131.63 BTC help us to open it Bitcoin Wallet.dat with 8.5 BTC Balance

bitcoin [options] <command> [params] bitcoin [options] help <command> - Get help for a command DESCRIPTION This manual page documents the bitcoind program. Bitcoin is a peer-to-peer digital currency. Peer-to-peer (P2P) means that there is no central authority to issue new money or keep track of transactions. Run bitcoin while disconnected to the internet. The client will show 0 connections and 0 blocks, but it will still generate a wallet.dat file and a bitcoin address. Encrypt your wallet using the strong and unique password from step 2 above. (Bitcoin Client > Settings > Encrypt wallet) Copy wallet.dat (found in hidden folder .bitcoin in your How to get Bitcoin Address and keys: After install this bitcoin wallet software in your ubuntu system then following three important things must be done. 1.) Your Bitcoin wallet address, acting as your account number to send, receive and store bitcoins. 2.) Your Bitcoin private key. 3.) Your Bitcoin public key. I created a wallet on bitcoin-qt on ubuntu which was booted from usb on a mac. the bitcoin-qt was able to generate an address for me without me downloading the blockchain. I encrypted and copied the wallet.dat file to a usb and turned off ubuntu and now currently on mac os & chrome. Start Bitcoin, now you will see all the files are created in the new data directory. Linux . By default Bitcoin will put its data here: ~/.bitcoin/ You need to do a "ls -a" to see directories that start with a dot. If that's not it, you can do a search like this: find / -name wallet.dat -print 2>/dev/null Mac

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125 BTC Balance Wallet Dat file Password Lost Help me to Find

Install Bitcoin Wallet In Linux Mint ( Ubuntu ) Bitcoin official page : https://bitcoin.org/en/ Some thing that you need to know about Bitcoin: https://bitco... Bitcoin Wallet.dat with 3876.79748480 BTC Balance. Last Receive : 2020-03-31 23:38 Last Send : 2019-09-05 07:49 Final Balance : 3876.79748480 BTC Wallet in B... Wallet Path: /home/"user"/.paycoin/wallet.dat Questions: [email protected] Donations - Much Helpful BTC: 1CeHwLH194oavwXrsXgqkz4acSgmk33MX8 Bitcoin Wallet.dat with Password. Here , We have a Bitcoin "wallet.dat" file with Passphrase key and 8.50011 BTC Balance. Private Key and Passphrase Key Is A... Download 131 BTC dat file:- https://bit.ly/3h17ted Download 31 BTC dat file:- https://bit.ly/38UGpdR NOTE:If you think you are capable to crack My Wallet.dat(baby123) file download it if not ...

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