How to Backup and Restore a Bitcoin Wallet -

Help with Bitcoin-QT backup .dat file on Mac.

Hi. How the hell do I open a backup file I saved from Bitcoin-QT? It saves it as a .dat file that my iMac does not comprehend. I have searched and I cannot find any answers. Thank you.
submitted by leeee99 to BitcoinBeginners [link] [comments]

[Help] [Question] I had to erase MBP and couldn't restore from time machine. Now I need help retrieving my old wallet info?

As stated I had problems with my MBP and had to do a clean restore. I then couldn't restore it from my backup on my time machine but instead had to pull the individual files from the backup. I need help finding a way to retrieve my old wallet and I believe I have a .dat backup? I do have the Bitcoin-QT wallet and I don't want it to start up and sync till I know how to retrieve my old wallet info. Any help would be greatly appreciated. Also just in case the .dat file isn't any help is there a way to pull it from my time machine backup?
[Edit] I have located the new wallet.dat file and Bitcoin folder and added the Bitcoin-QT Backup.dat file in there but haven't done anything with it yet. I am thinking about going ahead and running the Bitcoin-QT wallet and let it sync and see what happens.
[Edit] (Update) After posting on here and I had enough people come together and had different ideas to figure it all out. So my folder was hidden from plain sight and had to use the command+shift+[G] keys to see my hidden Bitcoin folder. Once I was in that folder I entered into time machine and the same exact folder came up and I went to the last backup before my computer got restored and copied those files and pasted those into the Bitcoin folder created after opening up Bitcoin-QT again to do a fresh sync.
So I deleted the new files and added my old files from my backup and then opened up Bitcoin-QT and it started to process and verify blocks. Once it opened up it had to sync all my data back on and showed my account balance from what I had prior to this whole ordeal. Now I wasn't sure it was going to work so it spent all night reindexing and syncing the blockchain and finally finished this morning. Once it finished I closed the wallet down and reopened it and it came right back to my wallet. So I am thankful for all the help and appreciate the bitcoin community for this. As I am sure everyone knows it can be kind of stressful to have to deal with something like this but luckily there are files and backups that help prevent anyone from losing the wallet completely.
I will now make sure I backup the wallet every month or so if not more often. This is one thing that I believe scares people from using bitcoins because it is easy to lose your wallet/BTC if you don't know what you're doing. I am looking into the Electrum wallet as well to see if I actually like that one. Thanks again for your help.
submitted by caosborne 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?

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]

Does the backup (Bitcoin QT) saves my BTC if i create thousands of addresses?

I'm using the latest version of Bitcoin QT
Just encrypted it and backed it up.
If i generate 20.000 addresses, and transfer BTC to this addresses.
Would the backup i made recover all my BTC?
submitted by gerardo15 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 : --- (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:
(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??
(1) The following (old, short) thread claims that after you encrypt an existing wallet, any previous backups of that wallet will no longer work:
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?)
(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]

Does the backup (Bitcoin QT) saves my BTC if i create thousands of addresses? /r/Bitcoin

Does the backup (Bitcoin QT) saves my BTC if i create thousands of addresses? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Recover bitcoin from bitcoin-qt client time capsule backup /r/Bitcoin

Recover bitcoin from bitcoin-qt client time capsule backup /Bitcoin submitted by BitcoinAllBot to BitcoinAll [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]

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]

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]

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
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]

Wallet Recovery Help

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.
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]

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.

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!


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


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 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.


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:
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


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?

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.
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.

Other Linux


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


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.





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.



Main Release (Main Net)
Testnet Release


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.


Live Version (Not Recommended)



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).





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).




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.


Remastered Improvements



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.



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


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.



Linux / OSX (Instructions)


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.



Main Net
Main Net (FDroid)
Test Net


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.




UPDATED – P2Pool Test Net



Pre-Hosted Testnet P2Pool is available via


submitted by Yokomoko_Saleen to groestlcoin [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:
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]

Where can I import my wallet.dat?

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]

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


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.





This video shows how long it takes to start Reddcoin Core.   TL;DR:


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

I mistakenly didn't have a fee on my transaction... please help!

I sent a transaction out and realized afterwards that I put the fee on zero. I have been waiting a few days to see if anyone would pick it up and it is still lost. I checked blockexplorer and my transaction is not listed. The transaction was sent out on 8/23 and I am using Bitcoin-QT. Is there anything I can do to possibly cancel or double spend my transaction to make it go through?
Edit: I ran zapwallettxes and rescan and the transaction is still showing in my recent transactions as status: 0/unconfirmed
Edit2: I didn't have the latest version of bitcoin-qt installed so zapwallettxes wasn't doing anything. After downloading the latest version (v0.13.0; although any that are v0.9.0 and up will work for this), I was able to run the commands and my bitcoins were back in my wallet! Thank you to everyone who commented.
Also, for any new guys who did this to themselves and are searching for a fix. To run those commands with the program, you need to go to your file location from command line (this is where bitcoin-qt actually is in your folder), when you're there the command is "bitcoin-qt -zapwallettxes=1 -rescan"
submitted by MindlessArt to Bitcoin [link] [comments]

Restore the Bitcoin Wallet- Bitcoin Hands On Course Lesson 3 Install, Backup And Restore A Bitcoin Wallet. Or, Almost Any CryptoCoin Wallet (Windows) How To Backup Your Bitconnect QT Wallet How to backup bitcoin wallet How to backup your Litecoin Wallet

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 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 And this is Bitcoin-QT: And this is MultiBit: Step 3 – Save your backup to a flash drive. Save your exported backup on to a flash drive and keep it in a secure place. If you have wallet.dat backup file for Bitcoin Core Qt client and want to restore it, do simple procedure: Backup Your Wallet. Although this process is well tested and used you should always take another backup of your wallet.dat file before starting. Close the Bitcoin-Qt client. Then you have to locate your Bitcoin folder. Then run the bitcoin client with the -rescan option. Alternatively you can run the bitcoin client with the -datadir=<location of backup wallet.dat> as well as the -rescan option if you do not want to move/backup the new wallet.dat. The default for Mac OS X is: ~/Library/Application\Support\Bitcoin The default for Linux is: ~/.bitcoin 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.

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Restore the Bitcoin Wallet- Bitcoin Hands On Course Lesson 3

Litecoin-QT wallet Private Key access tutorial. ... Install, Backup And Restore A Bitcoin Wallet. Or, Almost Any CryptoCoin Wallet (Windows) - Duration: 7:21. How to Secure & Backup Your Bitcoin or Other Crypto Wallets - Duration: 11:54. IMineBlocks 10,247 views. 11:54 [HOW TO]- Store Bitcoin On USB Stick - Guide - Duration: 14:01. Join Our Group Get %5 Back ,Earn $100 to $500, daily! with your investment on bitconnect %100 Safe & Trusted step by step to learn more about this program: ... Install, Backup And Restore A Bitcoin Wallet. Or, Almost Any CryptoCoin Wallet (Windows) mycomputerisjunk. ... (Or any QT Client) - Duration: 4:40. AntarcticWildlife 30,642 views. Backup And Restore Bitcoin Wallet. Here is a tutorial how to import your old bitcoin wallet into a new wallet in easy steps. in this video you can see how you Backing Up & Restoring a Bitcoin E ...

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