Backing up your wallet - Bitcoin Wiki

I had backup a wallet.dat file from bitcoin-qt before formatting my PC. But now I wanna use electrum. How do I do the transfer?

I dont wanna install Bitcoin-QT again and download the whole blockchain.
Is there a simpler way where I download Electrum and transfer those BTC from wallet.dat to the electrum wallet?
submitted by jonbristow to Bitcoin [link] [comments]

If I backup my wallet.dat can I reinstall bitcoin QT without losing BTC?

Trying to get a payment. Bitcoin QT stuck synchronizing. Last block data is from 302 days ago. Any tips welcome.
[UPDATE] WHAT I DID TO SOLVE THIS PROBLEM, KIND OF, AKA, A WORKAROUND. Backstory: This was also my first bitcoin transaction ever. & I'm not even mildly a computer genius.
1 Backed up my wallet.dat to a file on my desktop so I didn't lose it. (I was fucking scared of losing it)
2 Uploaded wallet.dat to : https://blockchain.info/wallet/ --- (since this was my first transaction, it's not like I had a lot of coins in my wallet so I figured I'll upload it here, cash in what I will, and move the rest someplace more secure)
3 Made a coinbase account.
4 Linked it to bank account with instant verification. (pretty neat)
5 Copied generated on coinbase (they don't explain it but coinbase is also sort of a 'wallet')
6 Pasted that address into the field on the page for sending coins on the Blockchain Wallet Page. Hit send. HELD BREATH CUZ I SENT A BUNCH OF MONEY THROUGH SPACE. The computer made a weird noise, like a DOS-y sort of beep.
7 Refreshed my Coinbase wallet and TA-DAA, they were there!!!
8 Waited while the transaction was 'pending' for a little under hour. (This is normal) 9 Sent to bank account. =] =] =]
submitted by takentraveler to Bitcoin [link] [comments]

(1) Is it true that encrypting an *existing* bitcoin-qt wallet.dat file will "invalidate" any existing backups? (2) Can I use unicode characters - eg ♥ - in the bitcoin-qt wallet passphrase?

I have an existing bitcoin-qt wallet.dat file which I want to encrypt - using the command in the bitcoin-qt Settings menu, involving creating a passphrase.
I have 2 (possibly somewhat related) questions:
TL;DR
(1) If you encrypt an existing wallet.dat file, will the backups of the old wallet.dat file still work?
(2) Can you include unicode characters - eg ♥ - in the passphrase used to encrypt a bitcoin-qt wallet.dat file?
Worst-case scenario: The answers to (1) and (2) are both "no" - and I attempt to encrypt an existing wallet using unicode, and my backups no longer work (due to a new pool of addresses somehow being created?) and the passphrase isn't what I think it is (due to the unicode characters somehow being misinterpreted?) - and then I could lose all my coins??
Details
(1) The following (old, short) thread claims that after you encrypt an existing wallet, any previous backups of that wallet will no longer work:
https://pay.reddit.com/Bitcoin/comments/1ccfdk/encrypting_walletdat_in_bitcoinqt/
Obviously, the the first response in that thread was slightly wrong, for saying that the "server" creates a new pool of 100 addresses to draw on. So using word "server" here was certainly incorrect - but maybe the gist of what they were saying might still be correct? (if you simply change "server" to "client").
I can actually understand that there might be reasons why encrypting a wallet.dat file could cause a new pool of 100 addresses to be generated.
But it does not make sense to me that this would make any older (unencrypted) backups instantly useless.
It seems to me that these older, unencrypted backups would still have their private keys intact, and could thus be used in certain (perhaps limited?) ways - such as:

(2) It seems that including a few unicode characters in the bitcoin-qt wallet passphrase would make it a lot stronger (since unicode is a much larger set of characters than ascii), so I would like to include a few.
But it would be more reassuring if it could be explicitly stated that this is indeed supported.

Possible catastrophic interaction between (1) and (2)?
If the answers to (1) and (2) were both "no" (ie, if you encrypt an existing bitcoin-qt wallet.dat file then any existing backups will not work, and unicode characters do not work in bitcoin-qt passphrases), then I'm worried there could be some kind of catastrophic interaction between (1) and (2) where I lose all my coins, as follows:
(1) I encrypt my existing wallet - making my old, unencrypted wallet.dat file now invalidated (due to something involving a new pool of addresses being generated?)
and
(2) I use a passphrase which includes unicode characters which bitcoin-qt appears to accept at the time of creation, but which doesn't work at the time of trying to decrypt the wallet.dat file (due to something going wring with how the supposed unicode characters are actually interpreted while being entered or copied-and-pasted?).
In this possible worst-case scenario, my old backups of wallet.dat no longer work, and my newly encrypted wallet.dat has some password which I'm not able to correctly enter anymore.
Sorry to be so paranoid about this!
Other remarks:
(a) I did do a (limited) test of unicode capability for bitcoin-qt wallet.dat passphrases: simply by creating a new (empty) wallet.dat file, and creating a passphrase for it involving unicode characters, and then attempting to change the passphrase (which requires entering the old passphrase that contained unicode characters).
This did seem to work ok: it let me re-enter the old passphrase (which included unicode characters) to create a new passphrase.
However, since this is an empty wallet (and since bitcoin-qt would ask for the passphrase only when attempting to actually spend from an encrypted wallet), I did not see a way to fully test whether the passphrase actually worked to decrypt a unicode-passphrase-encrypted wallet for the purpose of spending from it.
(I'm still downloading the rest of the blockchain and it's going to take at least another week on my slow connection, so don't see how I could send a small amount to the new wallet to test it either. My existing wallet.dat file was originally created on an internet-connected machine a long time ago, but it's been offline ever since, so in some sense it's kinda-sorta been in somewhat "cold" storage all this time, and I would prefer to avoid putting it online on a "hot" internet-connected machine until absolutely necessary.)
(b) Long-term, I am actually also in the process of setting up a proper cold storage system based on Armory, which I have installed on 2 Ubuntu machines (one offline and one online).
But I have a slow internet connection, and the backups of this old wallet.dat file have been sitting around unencrypted for ages (I've been relying simply on then being physically inaccessible).
Now some "things" are coming up over the next few days where I some better security right away, and it's probably going to take over a week for Armory/bitcoind to update my local copy of the blockchain.
So in the meantime, I also need some basic additional security right now - so encrypting the existing bitcoin-qt wallet.dat file using a strong passphrase (and making some new backups) seems like it could be a reasonable initial approach.
Thanks for any help!
submitted by encrypt_throwaway to Bitcoin [link] [comments]

Cold Storage: Can I just backup my wallet.dat file n USB and then delete the Bitcoin Core/qt off my computer?

Or does deleting the Bitcoin Core cause issues later with importing, specifically if I downloaded it onto another computer?
submitted by saskmine to Bitcoin [link] [comments]

Looking for eli5 on installing backup from old BTC-QT to new Bitcoin Core wallet. When I look at file directory for new BTC core wallet, I don't see .dat file that I could replace.

title says it all
submitted by wildjo to Bitcoin [link] [comments]

How to backup blocks on Bitcoin Core Wallet (Bitcoin-QT) ?

Hi, finally I have fully synced Core, but now I want to back up blocks, I will not keep Core installed for long so what do I need exactly to back up, just folder "blocks" ?
If I uninstall Core completly then install it, and replace "blocks" folder with blocks, can I simply start Core it will start verify blocks and start sync from say 25 March 2015 ?
submitted by Zyklon87 to Bitcoin [link] [comments]

I had backup a wallet.dat file from bitcoin-qt before formatting my PC. But now I wanna use electrum. How do I do the transfer? /r/Bitcoin

I had backup a wallet.dat file from bitcoin-qt before formatting my PC. But now I wanna use electrum. How do I do the transfer? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Preferred method for restoring a Bitcoin-Qt wallet.dat backup?

From what I can tell, the best practice method for restoring a Bitcoin-Qt wallet.dat backup file is:
  1. Shut down Bitcoin-Qt.
  2. Locate the OS-specific directory in which Bitcoin-Qt's wallet.dat file resides.
  3. Delete Bitcoin-Qt's existing wallet.dat (or move it to a safe place)
  4. Add the backup wallet.dat file into the directory
See:
http://bitcoin.stackexchange.com/questions/10974/import-wallet-dat-into-a-new-bitcoin-qt-client
https://bitcointalk.org/index.php?topic=151831.0
Is this really the preferred method to restore a backup? I'm wondering if I'm missing something from the UI (or possibly the console).
submitted by BobAlison to Bitcoin [link] [comments]

Looking for eli5 on installing backup from old BTC-QT to new Bitcoin Core wallet. When I look at file directory for new BTC core wallet, I don't see .dat file that I could replace. /r/Bitcoin

Looking for eli5 on installing backup from old BTC-QT to new Bitcoin Core wallet. When I look at file directory for new BTC core wallet, I don't see .dat file that I could replace. /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

How can I import an encrypted backup wallet.dat file to a newly installed Bitcoin-qt client on macbook??

Let's say one's macbook was to crash with all their data gone, but they have backed up their wallet into a usb. How can one import the wallet.dat file into a newly installed Bitcoin-qt client on a possibly new macbook?
submitted by sox1987 to Bitcoin [link] [comments]

Help recovering from old wallet.dat for an old friend.


Hey all,
I've been in the Bitcoin space since early 2012.
I have a situation that I would love to get some assistance with, I will explain the situation momentarily. Please do not message me and ask me for the wallet.dat file it's not going to happen.
TL;DR
I have an old wallet.dat file from late 2012 or early 2013 from a coin I sold to a friend. Tried to recover the coins in 2018 and failed, later found out that someone had access to the computer and could have easily stole them. Would the current Bitcoin Core be able to read an old wallet.dat file, and is there any way to easily view the balance of a 2012 wallet.dat file without having to load the entire blockchain?
In the early days of Bitcoin as many of you OG's know, the only option to securely store your coins was to use the default Bitcoin wallet in a wallet.dat file. A friend of mine was really wanted to invest in Bitcoin but didn't know how, so I sold one to him because I didn't want him to get screwed. I installed Bitcoin QT on their home laptop, had him write down the password on a piece of paper and had him put a backup of the wallet.dat file onto a USB.
Fast forward to when the price went to $20k plus, he calls me up super excited and said he wanted to sell his coin because he could use the money and I encouraged it because from my prior experience I knew the momentum was unsustainable and I had sold a few coins of my own.
Anyway, I go over to his house and we huddle around his computer. He tells me that he upgraded the hard drive in his computer and gave me his old one and I went back to my house to get an external hard drive reader. I came back, booted up his old drive and remembered that we would have to let it sync up in order to get the coins out, and on his internet that wasn't going to happen anytime soon. He gave me the hard drive and I went home and left on Bitcoin QT overnight and in the morning I was shocked to see that there were no transactions on the wallet. Quick note, he had the wallet password in a file on his documents titled "Bitcoin Wallet Password.txt". smh.
I started to panic, and I realized how bad this looked on me. I called him and told him that there were no coins on there and asked if he had his USB stick and he told me he had lost it years ago. I frantically looked through all of my old wallet files to find any transaction that could link to his address, to show that his coins were still in there. After a while I realized I had sent the coins from the now defunct btc-e.com, and had no way to check up on the coins.
I did everything in my ability to try to recover lost data from the hard drive to no avail. I asked him if anyone else has had access to his computer, and then asked him how he replaced his hard drive because I know him well enough to know he wouldn't pull apart a laptop to replace the hard drive. He told me he took it to a shop to have it replaced a few months earlier. I suspect that I'm either trying to view the wallet incorrectly or whoever replaced his hard drive snooped on his hard drive, stole the coins and replaced the wallet.dat file and generated a new one. I have to admit, I was relieved a little bit to have an explanation to coins not being there but I could imagine he thinks I may have had something to do with it. I made a few more attempts over the years whenever I was reminded of the situation to no avail.
We kind of fell out after that and haven't spoken in a while. Recently, I saw a post on his Facebook that his wife is pregnant they are having a baby, and that's why I'm here. I would love nothing more than to be able to message him and let him know that I have 11 grand waiting for him, because I'm certain the money would mean the world to him during such a stressful time.
Any help or insights would be incredibly helpful and appreciated.
submitted by Good-Exercise to Bitcoin [link] [comments]

Peercoin v0.9 (Codename Strider) Released - Includes Update to PoS Reward Economics - Hard Fork is June 8th, 2020 - Upgrade Today!

Peercoin v0.9 (Codename Strider) Released - Includes Update to PoS Reward Economics - Hard Fork is June 8th, 2020 - Upgrade Today!
NOTE: If you are new to Peercoin, check out the Peercoin Primer, a short 5 part video series covering the basic fundamentals of Peercoin.

https://preview.redd.it/3v73ap26c4z41.png?width=600&format=png&auto=webp&s=67e30f6f72e7e7ba1370f74a3ad952a3d951f9dd

Peercoin v0.9 Released!

We are pleased to announce that after many hard months of work, Peercoin v0.9 (Codename Strider) is complete and a hard fork is planned for Monday, June 8th, 2020 at 12:00:00 UTC. You must upgrade your wallet client before then!

Changelog:

Peercoin release v0.9.0
  • RFC-0019: PoW Block Spacing
  • RFC-0018: PoS Rewards Adjustment
  • RFC-0017: Limit Effective Coinage to One Year
  • RFC-0015: Reduce Time Drift
  • allow staking=0 command to disable minting
  • ability to filter out mint transactions in the QT wallet

Summary

While Peercoin v0.8 (Mantis) was largely about modernizing the codebase and improving the technical capabilities of the reference node software, the v0.9 (Strider) development cycle was about the economics of the Peercoin cryptocurrrency.
Both the PoW and PoS aspects of the network have been modified. Proof-of-Work changes are rather minimal; in summary target block spacing has been set to 60 minutes, rather than having dynamic PoW block spacing target. Block spacing is currently approximately 60 minutes anyway, so this may not sound like a big change, but it stops some PoW pools from trying to game the system. By making PoW more predictable, RFC-0019 brings inflationary stability to the overall system.
That change is minor when compared to the modification of the Proof-of-Stake side of the system. Some of you may have been following the discussion on RFC-0011, which was ongoing for over a year, and you may have noticed that RFC-0011 was rejected about two weeks ago and replaced with RFC-0018.
In my personal opinion, RFC-0011 is a great idea, probably the best idea thrown around here in the last couple of years, but ultimately it's too complex and we could not get consensus about it. The gist of both RFC-0011 and RFC-0018 is that the Peercoin money supply inflates at a rate of 1% on paper, but we are nowhere near that in practice.
In the old system, in order to have PoS inflation at 1%, a full 100% of all peercoins would have to start minting and solving blocks. This is simply impossible. In reality, over the last couple years Peercoin's PoS inflation has only been between 0.10% and 0.20%, which is far from the "promised" annual 1%. Due to the very rough history of this beautiful blockchain, namely the closure of btc-e, dozens of exchange hacks and closures, as well as a couple of de-listings, we are in a situation today where nearly half of the monetary supply has not been moved for over two years and we can consider those coins lost for all intents and purposes.
The basic principle of RFC-0011 was the following: the Peercoin network promises a steady inflation of 1% on monetary supply, and if you want a cut of it: mint. In essence, if only 20% of all peercoins are minting, the effective reward for active minters would be closer to 5% per year. However, the problem with this scheme is that minters would try to game the system and only mint when minting participation is low. Thus, we came up with RFC-0018, which yields similar results, but keeps the reward calculation simple and prevents gaming of the algorithm. You can read more about the change here.
Long story short, the network will reward active minters more, while keeping the overall inflation around 1%.
Accompanied with an expected inflation drop from increasing PoW hashrate, overall monetary inflation will largely remain unchanged, and will be more stable.
Other changes are minor and do not change the behavior of the network. RFC-0017 is just a consequence of RFC-11, and it stops minters from going offline for longer than a year and coming back to mint. We did not see this as fair, so the coinage counter is reset after a year now. Limiting coinage disincentivizes extremely long term periodic minting, thereby making continuous minting more attractive.
-- Peerchemist, Peercoin Project Lead

Upgrade Instructions

Before installation, make sure to backup your wallet from the main menu.
The v0.9 client can be downloaded from the wallets page of peercoin.net. For users upgrading from v0.8, upgrade instructions can also be found on that page.
For the minority of users that may have skipped v0.8 and are upgrading from v0.7 or earlier, please check these additional instructions from the previous v0.8 release thread as you will need to go through the additional process of rebuilding your block database. If you need help with installation, leave a comment below.

Conclusion

To stay informed as we get closer to the hard fork date, you can follow the latest Peercoin news on our forums, our Twitter, or Reddit.
Other places to follow us:
Facebook LinkedIn BitcoinTalk Youtube Medium
Don't forget you can see the latest updates using the Blockfolio and Delta Apps!
Download Link: https://github.com/peercoin/peercoin/releases/tag/v0.9.0ppc
Final reminder: The upgrade deadline is planned for June 8th, 2020 at 12:00:00 UTC
submitted by Sentinelrv to CryptoCurrency [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]

Where can I import my wallet.dat?

Hello!
I am fairly new to Bitcoin, but one year ago, I made a Bitcoin address on Bitcoin-Qt, but I stopped using it, because the whole database downloading took so much space on my disk.
I have my wallet.dat file, but I don't know, where can I use it. I tried Electrum, but it seems that the wallet.dat import doesn't work there.
Can you recommend me any other wallets, where I can import that file?
Thank you.
submitted by Amic58 to Bitcoin [link] [comments]

Help me recover my bitcoins from my wallet backups.

Hey guys.
The history: In 2013 or 2014 I bought 1 BTC and I stored it in one wallet (don't remember which). I have a wallet.dat in my PC and an Armory wallet backup on pdf (paper).
The Armory Backup was encrypted and now I can't see public addresses, but AFAIK this shouldn't be an issue because the backup was done later than the last transfer. How can I know if there are bitcoins in the paper wallet? I've had lots of problems with Armory and can't manage to sync the blockchain.
On the otherhand I have a HDD from that era with Bitcoin QT installed and a wallet.dat there. The thing is that I can't access that wallet and I don't know if the funds are there. How can I tell if there are BTCs there?
I checked the last public key used and still it has the money in it (checked n blockchain.info)
The last option is that I transferred that 1 BTC to other wallet that I lost and never backed-up, but I think this is very unlikely.
Is there anything I can do to find my missing bitcoins?
submitted by pedrots1987 to Bitcoin [link] [comments]

Do we need to backup wallet after 100 transactions in DogecoinQT like in BitcoinQT?

I saw a post on /bitcoin about this problem with BitcoinQT: link. Apparently the wallet.dat doesn't save more than 100 addresses and after 100 transactions your backup won't reflect the state of the wallet correctly anymore.
Does it also apply to DogecoinQT?
submitted by elFlexor to dogecoin [link] [comments]

350 bitcoins, encrypted wallet.dat deleted - lost forever?

I know I am insanely stupid. There is no need to be upset and yell that at me through the screen. I am happy to not be a gun owner because tonight I would have killed myself. I am posting this because countless others have posted similar stories whereby they learned important lessons the hard way due to lack of technical knowledge. In my case, the reason for this lack of knowledge was likely, ironically, the same reason I bought some bitcoins: drugs. I won't get into that. What I will post is where I went wrong, and where I'm at now.
Here's the full story: I had a securely encrypted wallet.dat with about 400 bitcoins on it that were purchased back at $10 or so. I pulled said wallet out of cold storage recently to cash money out of this wallet a few times to get some gift cards from gyft.com. I missed something ABSOLUTELY CRITICAL in my understanding of encrypted wallets.
When you send money, your wallet.dat file changes. You ABSOLUTELY MUST make new backups before deleting this file. Please don't do what I did and simply disregard this file after making changes on the blockchain...and then, on the same PC (sigh) proceed to reinstall StarCraft II when it fails to run due to Virtu MVP being retarded, ruining any shot at recovery (NONO #2: NEVER run bitcoin on your primary machine FOR ANY REASON).
I was a fool. Now I'm staring at TestDisk and File Manager in Parted Magic (linux boot disc) in total, absolute disbelief. Unless my data is stored within ".sst" files (never worked with these before and I can't figure out what they are with google, though it looks like fucking chrome shit because I leave it open all the time), which it may be, I don't know what to do. Maybe I'll try GetDataBack NTFS next. Maybe I can actually read filenames proper more effectively there? Does anyone have experience with this?
I have turned off the main PC and booted it up into parted magic so there is no data being written to the drive anymore. If there is ANY shot at this wallet.dat being recovered I am not screwing myself over any more now.
If anyone helps me out with this, I will compensate you generously. I am scared and lost. I never deserved bitcoin to begin with. If I can't get them back...well...enjoy the value appreciation, I guess, everyone. =( Such shame I have never felt; such guilt I may never feel again.
I have tried my old wallet.dat files repeatedly before coming to the realization that encrypted wallets change with each and every transaction...and the one backup I thought I made (moved, not copied) says it is corrupt.
It's easy to pretend what this feels like, but it's much worse in person. Educate yourselves and split up your wallets - now. Don't let this happen to you. If anyone is a kind soul and willing to help, feel free to PM me.
EDIT: I just recovered everything with an old wallet.dat. Tonight I went full tard. Luckily, this was a throwaway. I will never forget this...all of you came together to help, to suggest, to fucking CARE.
I WILL NOW TAKE TOMORROW OFF (sick day since I still feel sick as hell) TO FIX MY OTHER ISSUES WITH THE WALLET (aka putting all my eggs in one basket, keeping on a machine that is not specifically fucking made only for bitcoin, not using electrum/armory, not having my primary storage machine OFFLINE, etc.) All of you - ALL of you - are less selfish and less stupid than me. You should all feel amazing.
submitted by commanderkilly to Bitcoin [link] [comments]

HELP! Bitcoin qt client crashed on my computer with a database error! Lost all my bitcoins?!

hey guys,
The bitcoin qt client was catching up with the blockchain (5 days worth), when after maybe 15 minutes, it comes up with an error, "database corrupted" or something along the lines of that. I looked it up and users said to delete everthing in my %appdata/roaming/bitcoin% directy except the wallet.dat file.
So I did that, and downloaded the latest bitcoin qt client, but as it's got 252 weeks to catch up on, it shows 0 btc, is this normal? Will it show my bitcoins whilst it's done updating?
It should show it at the end, right? Once it's seen the transactions on the blockchain? Sorry, I'm just ultra panicky atm from not seeing my bitcoins :S
EDIT: GOT MY BITCOINS. For anyone that has this problem in the future, it's 99.99% likely it's a RAM problem. Took my dodgy ram stick out and used a rescan tag & it was all good to go! You can also import the boostrap.dat file.
submitted by TheNewHero to Bitcoin [link] [comments]

How to Spend a Bitcoin Paper Wallet in Three Easy Steps

How to Spend a Bitcoin Paper Wallet in Three Easy Steps submitted by BobAlison to Bitcoin [link] [comments]

Checking my bitcoin wallet after two years and I find that all my bitcoin is gone (0.5 bitcoin)

After checking my bitcoin account after two years, 0.00010757 of a bitcoin remains even though I explicitly remember having half a bitcoin left. My first thought someone somehow stole it. But after looking through my transaction history, it seems that there were additional transactions made alongside the transactions that were made before.
Here is a link to a chart of my last three transactions made to CoinBase:
https://i.stack.imgur.com/8sZIG.png
The three transactions highlighted in green were the ones that were supposed to happen but I noticed that these other mysterious transactions made alongside them also had the same IDs as the intentional transactions. The three that aren't highlighted add up to the amount that I remembered that I had two years ago, appx. 0.50055605 bitcoin. I'm not sure what these random transactions are and I'm not sure why after two years, my .5 bitcoin just vanished. I thought that the matching IDs would give me some sort of clue and it seems like these random transactions are going to a different address. Were they supposed to be sent back to my own wallet or something?
Here are the three IDs respectively: f034f9408736868ed5d070fb8fe6b5674881573815be16b791782fcdcec5d6e6 ebe2b9acce094d175577efedf8d5a1edc83ccbf5291e155a12af1c2dc5e6dd10 9cdd52384c465acd38141e6ead748cb85f74e8afef8781989e5c3592cb6bc493
I am also currently using the Bitcoin-Qt client.
After reading about it it seems like bitcoin has this change system and I think that that is probably the culprit. I looked through my Bitcoin-Qt client and I see no additional addresses.
Anyone have any ideas?
Edit: I went and tried validating the three addresses that murdocsvk posted but it said that they weren't mine. Would it be worth it to try to salvagewallet? I don't have any more backups so this is the only copy I have.
submitted by samyoruu to Bitcoin [link] [comments]

Backup after every 100 send/receive transactions?

I thought you only had to backup the wallet once, but apparently you have to do it every 100 transactions because the wallet.dat only contains 100 private keys.
Does anyone understand this better, what would happen if you restore a wallet.dat that had since had more than 100 transactions made?
If this is the case shouldn't bitcoin.org make it more clear that its important to make regular backups?
submitted by danster82 to Bitcoin [link] [comments]

World Backup Day. Backup your wallet.dat today!

Today is World Backup Day. We all know that backups are something that you must do again soon, because the last time you backed up was like, one, two years ago?
I figured that backing up your wallet.dat today is the just the right moment. Just do it now, not tomorrow. And while you are at it, have a look at you photo's and other stuff.
If you make regular backups, even better. Maybe today you can find some time to verify your backups. A backup that can't be restored is useless.
Don't be an April Fool.
submitted by jtlarousse to Bitcoin [link] [comments]

Bitcoin-QT Wallet Update Restore the Bitcoin Wallet- Bitcoin Hands On Course Lesson 3 How to Back Up Your Bitcoin Wallet How to backup your Litecoin Wallet Bitcoin: How to Get your Bitcoin Core Wallet Up and Running

Whether it’s Blockchain.info, Bitcoin QT, MultiBit or any other wallet. Step 2 – Look for “Backup wallet” or “Export private keys” Search inside the wallet’s menu until you find one of these options. Here is Blockchain.info: And this is Bitcoin-QT: And this is MultiBit: Step 3 – Save your backup to a flash drive There are generally 3 ways to backup a Bitcoin wallet. Different software supports different methods. Make sure you're familiar with your wallet before loading it with bitcoins. If you lose the backup and can't access your wallet for some reasons, your bitcoins are permanently gone! Wallet.dat . This method is used by Bitcoin Core (and few others) and comprises of backing up a wallet.dat file ... Don't understand most of the elements that you find in your Bitcoin core wallet or your Altcoin QT wallet? Educate yourself. Make use of this guide where we've explained everything in and out about Crypto currency wallet from backup to encryption to exporting your wallet private keys. The first wallet program called Bitcoin-Qt was released in 2009 by Satoshi Nakamoto as open source code. Bitcoin-Qt, also called "Satoshi client" is sometimes referred to as the reference client because it serves to define the Bitcoin protocol and acts as a standard for other implementations. As of version 0.9, Bitcoin-Qt has been renamed "Bitcoin Core" to more accurately describe its role in ... 2] Making a Bitcoin Wallet Backup. Backup of anything is useful and if we are talking about our earning it is very essential and crucial at the same time to make a backup for it. Making a backup for crypto is the same and very essential which allows you access to the Bitcoins at any point in time whether your software is corrupted or stolen.

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Bitcoin-QT Wallet Update

This short tutorial explains what a Bitcoin wallet backup is and how to create it on 3 different wallets: Blockchain.info, Bitcoin-QT and MultiBit. For more information and tutorials about Bitocin ... This video is an overview of the new updates that came to the bitcoin-qt wallet as of 0.8.2 What is BitCoin: http://youtu.be/Um63OQz3bjo Dwolla: https://www.... How to get your Bitcoin Core wallet up and running. Backup it and protect it with a strong password. Share this Video: http://youtu.be/g9ziT7d4Q-s In the previous lesson we took a backup of the Bitcoin wallet and put it on a USB stick. We are now going to imagine that our PC has died and we have bought a new one. Once you get the Bitcoin-qt ... Litecoin-QT wallet Private Key access tutorial. Client dumpprivkey walletpassphrase ... Install, Backup And Restore A Bitcoin Wallet. Or, Almost Any CryptoCoin Wallet (Windows) - Duration: 7:21 ...

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