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ZOIN / NOIR Digital Currency with Anonymity Features
ZOIN/NOIR is a decentralized digital currency to use for your secure, private, and untraceable transactions. The technology is based on Zerocoin Protocol to offer you complete Anonymity. You are your own bank. Our goal is that your privacy remains confidential.
Quark is a decentralized digital monetary system. It facilitates sending Quarks to Friends, Family Members Online Payments free of charges and charge-backs. Military Grade Encryption. No Bank or Government Control. Quark coins are based on the original idea of Bitcoin but improved, more secure, faster transaction times and zero fees. With improvements to design and security. There is also a greater coin supply with higher block rewards for miners. Quark is fully Open Source.
bitcoin-qt ready for use within half an hour … download an up-to-date pruned blockchain
Let us discuss how safe this is :-) This tutorial is for Linux only but people using other operating systems will understand what to do. Download the bitcoin blockchain https://drive.google.com/drive/folders/0B0nH34wIYOSlSG81ZUZUZGZjVkE?usp=sharing This will download (~20 minutes) the 2485 MB file: bitcoin_blockchain_pruned_550MB_19aug2016.tar.gz It contains only blocks, no wallet or log files. It has been created with -prune=550 Unpack tar -zxvf bitcoin_blockchain_pruned_550MB_19aug2016.tar.gz and observe it contains only blocks and chain state data. This will create the directory: .bitcoin_pruned_550MB_19aug2016 Let’s assume you move this to ~/.bitcoin_pruned, so mv .bitcoin_pruned_550MB_19aug2016 ~/.bitcoin_pruned Run bitcoin-qt When you start bitcoin-qt, a new wallet will be created: back it up first. My advice is to use bitcoin-qt 0.13.0rc3, because it creates a HD wallet that never runs out of addresses. Start bitcoin-qt in fast start-up mode first: bitcoin-qt –prune=550 –checklevel=2 –checkblocks=10 –checkblocksverify=10 –datadir=yourpath/.bitcoin_pruned and let it sync quickly. Check more thoroughly next time with 10 -> 500000. You can have a quick look at what’s happening: tail ~/.bitcoin_pruned/debug.log.
FOR NOW, the drawback is that if you want to add addresses (watch-only or spendable) that already contain bitcoins, you have to create the pruned blockchain from scratch yourself, which takes a lot of time (or have someone with a full blockchain rescan the wallet for you). This is not really necessary: if the user is not interested in the history of his transactions, the balances can be obtained directly from the UTXO set. It has already been approved to add this feature in some future Core release: https://github.com/bitcoin/bitcoin/issues?q=is%3Aissue+is%3Aopen+label%3AWallet, #8497. I will automatically update the google drive with new up-to-date blockchains soon. EDIT: openssl dgst -sha256 bitcoin_blockchain_pruned_550MB_19aug2016.tar.gz SHA256(bitcoin_blockchain_pruned_550MB_19aug2016.tar.gz)= ce36bcb9ab691c358b27d3051f8f38452bc182ca636eae992563c60805a9d4b0
In 2011 when I first downloaded the Bitcoin software I staired at Bitcoin-qt and I thought: what now? And now I am chatting about the world cup soccer on the Bitcoin Cash blockchain through memo.cash. How cool is that? /r/btc
In 2011 when I first downloaded the Bitcoin software I staired at Bitcoin-qt and I thought: what now? And now I am chatting about the world cup soccer on the Bitcoin Cash blockchain through memo.cash. How cool is that?
This is frustrating. This might be the 10th time I've had to try to explain this in this subreddit: Bitcoin-qt blockchain downloading is NOT network bound. It is HDD bound. Bitcoind/qt 0.8 greatly increases initial chain sync speed because it reduces the HDD bottleneck.
Swapped hard drives, now the bitcoin qt client is trying to download the blockchain to my solid state hard drive. Has anyone had this issue before?
I don't see options to look up what was already on my wallet that was on my other hard drive that I have connected. Instead it is just putting it on the new hard drive. Is there a way to have it save to the old hard drive?
Was using bitcoin-qt on OSX, blockchain got corrupted and now it is impossibly big to re-download, what thin clients can I import my wallet.dat into?? OSX 10.7.5. I already tried electrum and looks like I'd have to build it from github, can't figure it out. please help.
Send help! is there a safe way I could download a torrent of the blockchain? i tried to reindex the blockchain (after my harddrive got unplugged while bitcoin-qt was running) and it looks like it would literally take a week of spinning my poor laptop fan balls out. edit: wallet.dat is encrypted and safely backed up.
How do I move private keys from Bitcoin-QT to another wallet without having the blockchain downloaded?
I currently access my bitcoins on Bitcoin-QT and have used a pretty good passphrase to encrypt the wallet.dat file. I would like to eventually move my coins to a paper wallet for offline storage, but currently want to get my coins over to blockchain.info (I set it up the account on a thumb-drive linux system with 2FA and a great password). I've read instances of people decrypting their wallet, then finding some unknown malware on their computer immediately emptying their wallets. I don't want to rely on the computer I currently have my wallet.dat file on just in case this happens to me. I'm trying to get my private keys into something like electrum or multibit using pywallet to decrypt my wallet.dat on a fresh linux system (thumb-drive again). However, the format from pywallet doesn't seem to be right to get it on electrum nor multibit. Is there a special way to extract the private keys from wallet.dat to import them into multibit or electrum? I don't think using Bitcoin-QT on my thumb drive is an option since the blockchain is so huge and I think the blockchain is needed to do anything with Bitcoin-QT. I didn't find too much help via google or the security guide on the right side of this page.
What is advantageous in downloading whole blockchain on the hard drive as in Bitcoin QT, and why does clients like Electrum get away without it?
It seems cumbersome downloading few gigs of data just to make several transactions, but I recon it has its reasons. Isn't its potentially harmful to the network if more people used Electrum? It seems kind of like leeching in the Torrent network.
Hi /Bitcoin I have a problem with my bitcoin qt client, I have used my wallet on the client to send and receive bitcoins several times, but recently it has just stopped downloading the blockchain, it is stuck on 282 weeks, since I have bitcoins on the wallet I'm not really happy to lose it. Here is a list of what I have tried
Downloading the blockchain (bootstrap.dat) from a torrent and moving it to C:\Users\"USER"\AppData\Roaming\Bitcoin, but this just renames the file to bootstrap.dat.old after a while.
Downloading the new bitcoin qt version(v0.9.1.0)
Letting it download for several hours
Nothing works and it just keeps saying "Synchronizing with network" and "282 weeks behind"
Does Armory and Bitcoin-QT download seperate (but the same) blockchain, or do they both work off of the same blockchain (so you only need to download it once with either of them, and then you can use both)?
I want to know if I can "uninstall" bitcoin-qt and the blockchain it downloaded if it is using a "different" one than Armory since I'm using Armory now.
Erase mac Bitcoin-QT wallet but keep the downloaded blockchain
Hey everyone, my wallet recently got messed up importing a bad key or two. I was able to recover the money through a tedious process. I would like to reset it, without deleting the whole thing and without losing the blockchain I've spent so many days and hours downloading. Any suggestions?
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:
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.)
Now you can list files by:
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:
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:
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:
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.
1. Install Bitcoin-Qt Since version 0.9, Bitcoin-Qt was renamed to Bitcoin Core t o reduce confusion between Bitcoin-the-network and Bitcoin-the-software. Bitcoin Core is a full Bitcoin client. It is a thick client, meaning it requires the full blockchain (explained below) on local disk to operate and expose blockchain back to the network to help relay and verify transactions. Make the new shortcut for bitcoin-qt.exe with next parameters: bitcoin-qt.exe -datadir='D:\blockchain' Make sure that you set correct destination for datadir and replace path 'D:\blockchain' to your downloaded blockchain folder if needed. Start the program using shortcut. Download Qt Bitcoin Trader for free. Secure Trading Client for most popular Bitcoin exchanges. Supported Exchanges: HitBTC, Bittrex, Binance, Bitfinex, BTC-e, Bitstamp, GOC io, Indacoin, YoBit net, BitmarketPL and BTCChina. This software helps you open and cancel orders very fast. Blockchain.com is the most popular place to securely buy, store, and trade Bitcoin, Ethereum, and other top cryptocurrencies. Linux: clicking on bitcoin: links was broken if you were using a Gnome-based desktop. Fix a hang-at-shutdown bug that only affects users that compile their own version of Bitcoin against Boost versions 1.50-1.52. Other changes
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