Transferring coins from Bitcoin-Qt to Electrum - Bitcoin Wiki

Transferring private keys from Bitcoin-qt to Electrum wallet, but amount is wrong?

So basically I started out with Bitcoin-qt years ago, but it's too cumbersome now with me needing the giant blockchain downloaded.
Anyway, I decided to try Electrum. I read how to extract my private keys from the bitcoin-qt wallet address, and import them into my newly created Electrum wallet.
Bitcoin-qt showed I had 9 receive addresses, and after importing all 9 into Electrum the amount isn't the same. While it's not a gigantic difference, Electrum shows roughly 0.015 BTC less than Bitcoin-qt. When I check all of the address on blockchain.info and add them all up it comes out to what Electrum is showing.
Does anybody know why Bitcoin-qt is showing more (which should be correct from all my previous transactions), and how to get the small remaining amount imported into Electrum without just transferring the balance (thus incurring a fee)?
submitted by cr4zymanz0r to Bitcoin [link] [comments]

Transferring private keys from Bitcoin-qt to Electrum wallet, but amount is wrong? /r/Bitcoin

Transferring private keys from Bitcoin-qt to Electrum wallet, but amount is wrong? /Bitcoin submitted by BitcoinAllBot to BitcoinAll [link] [comments]

Guide for novice crypto investors

Bitcoin is a decentralized system, any user of which could control the movement of their own funds. You can use the currency to make transactions, pay for purchases, receive transfers, and exchange it for cash. For transactions, a special address is used, encrypted with a 16-character key. The buyer decodes the code to transfer bitcoins to the specified address.

Bitcoin Mining

Mining is a process that ensures the security of the BTC system, which adds new blocks to the blockchain in chronological order (new transactions). Blocks are added when the codes are decrypted, the transaction is completed, and bitcoins are transferred or exchanged.
The main cryptocurrency is generated by miners using software that solves cryptographic problems. The reward for a new block is agreed by all network participants, but usually amounts to 12.5 bitcoins. Part of the user fees for transactions also goes to reward the miners. Cryptographic tasks become more complex every year to prevent inflation (mining complexity).

Features of the transaction

  1. Anonymity. The address that Bitcoin is sent to consists of 30 characters. You can track the flow of transactions, but the address is not always associated with a real person.
  2. Security. The balance of bitcoins is fixed in a cryptographic system with a public key. Only the owner of a private key can send cryptocurrency to other addresses.
  3. Unable to cancel. It is no longer possible to cancel the transaction after the transaction has been completed.
  4. Deregulation. Everyone can use cryptocurrency.
  5. Coverage and speed. Information about the transaction is transmitted incredibly quickly, and confirmation is received within a few minutes. No one knows the buyer’s physical location.

Where to buy Bitcoin?

There are Deposit systems that use crypto-exchanges. So, to buy Bitcoin, you will first need to top up your balance, buy the digital currency itself, and then withdraw it to your Bitcoin wallet, paying a Commission for withdrawing coins. The cheapest method of buying is buying on the stock exchange. The exchange rate is as close as possible to the market rate.

BTC rate

The current exchange rate of the coin is calculated based on the average price on the largest currency exchanges. For example, you can track the exchange rate on our Bitniex exchange. The Bitcoin exchange rate is constantly changing, during the day it can change by 10% in one direction or another.

The choice of crypto-currency wallet

A cryptocurrency wallet is a place where digital currency will be stored. The most secure method of storage is using paper or electronic wallets.

TOP secure cryptocurrency wallets

These wallets are one of the most secure crypto wallets in the world:
submitted by Bitniex to Bitniex [link] [comments]

How-to: setup your multisignature Cold wallet in Bitcoin Core 0.20 (highest security setup)

Last release of Core is amazing !
The main new feature is sortedmulti descriptor. This allows you to import your multisig setup in Core almost as if it was Electrum when combine to the new PSBT export in GUI !
As it needs command line and some weird checksum, you also need to input very long command in the console and if you made a mistake, you cannot copy the last command you made. So take your time when the commands are long to check everything and don't miss anything, use copy paste before validating the long command. You only have to do this once fortunately :)
I detail here how you do it with a k of n setup, good luck:
And you are DONE ! You should get the exact same addresses than Electrum and you can created receiving addresses in Qt ! To send money, just go to the send section, use the new coin control feature and export a partially signed transaction. You can use HWI or Electrum to sign it with your hardware wallets !
Notice: You can import more or less than 2000 addresses of each type. If less, blockchain rescan is faster but you may need to redo what we have done here later when all addresses will have been used once. If more, it is the contrary.

You now have the most possibly secure setup in one software: multisig with hardware on the full node wallet. When Bitcoin Core 0.21.0 will be out, we will also have native descriptor wallet so maybe we will have HD version of this. But for now, this is the best you can do ! Enjoy :)

P.S. : if you like doing things in one shot you can do the last two steps in one big command: importmulti '[{"desc": "wsh(sortedmulti(k,[path1]xpub1.../0/*,[path2]xpub2.../0/*,...,[pathn]xpubn/0/*))#check_sum0", "timestamp": birth_timestamp, "range": [0,2000], "watchonly": true, "keypool": true}, {"desc": "wsh(sortedmulti(k,[path1]xpub1.../1/*,[path2]xpub2.../1/*,...,[pathn]xpubn/1/*))#check_sum1", "timestamp": birth_timestamp, "range": [0,2000], "watchonly": true, "internal": true}]'
submitted by Pantamis to Bitcoin [link] [comments]

Here's the famous ESPN sign! I'm the bitcoin sign guy. I keep losing my throwaway account passwords. I'm going to be interviewed tomorrow by someone big. What questions would you ask so I can be ready? I'll tweet the interview time/place so you can tune in. Proof in URL

Here's the famous ESPN sign! I'm the bitcoin sign guy. I keep losing my throwaway account passwords. I'm going to be interviewed tomorrow by someone big. What questions would you ask so I can be ready? I'll tweet the interview time/place so you can tune in. Proof in URL submitted by Bitcoinsignguy to Bitcoin [link] [comments]

I want to remove my BTC from an online exchange... where to?

Title says it all really - not overly happy with them sitting on a server somewhere with all the recent legislation about centralised exchanges.
Where can I move them where I don't have toworry about any of this?
Cheers!
submitted by do_you_realise to Bitcoin [link] [comments]

Have I lost my BSV?

HI guys
So, I've been hodling some BTC in a BitcoinQT wallet since before the BCH and BSV forks and I finally decided to claim them.
My BTC wallet had 4 private keys. I swept those private keys into my Electron Cash wallet, which I had restored from my Electrum wallet seed and had used previously to successfully split the BTC that was in the Electrum wallet.
So far, no problems. All the BCH showed up in Electron Cash. But then I tried the next step, which was use ElectrumSV to copy my Electron Cash wallet and use the built in splitting feature in ElectrumSV. That procedure worked perfectly when I split the BTC that was in my Electrum wallet, but this time, ElectrumSV only showed the BSV that was split from 1 out of the 4 private keys. The other 3 were missing.
The one that did show up, I had actually previously swept that key into my Coinomi BCH wallet before I rembered I had to split the BSV/BCH.
I'm hoping someone here can offer some guidance going forward. Were the coins double-spent whenI swept my BTC keys into Electron Cash? Any idea why ElectrumSV isn't acurately copying my Electron Cash wallet like it's supposed to? The transactions appear on the BCH blockchain, but not the the BSV blockchain. Should I just sweep those BCH keys into Coinomi at this point?
Hope this post wasn't too rambling and convoluted to follow! Any help would be greatly appreciated. Cheers!
submitted by Spunkrawker to btc [link] [comments]

I've been very interested in Bitcoins lately and today I just made my first paper wallet!

I've been very interested in Bitcoins lately and today I just made my first paper wallet! submitted by waylaidwanderer to Bitcoin [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]

is it safe to open my bitcoin core wallet to electrum?

i formatted my laptop and needed to download and install the bitcoin qt again, after i copy and paste my wallet.dat its showing that it has to sync for 8 years, and i think it would take weeks beforenit fully sync. i wonder if i can save my wallet.dat and paste it to electrum? but is it safe? i look at youtube and no instruction on how to do that.
submitted by liteayan to Bitcoin [link] [comments]

cold storage compatibility issues

Hello, I have been a fan of electrum because of its offline capability. I like that I can use Bitcoin while storing my private keys on a computer that has the wifi card removed and hot glue stuffed in the Ethernet port. However it looks like maybe the electrum developers have over-promised and under-delivered in this regard. Or, maybe they simply do not have the time, energy, resources to make this work in real life.
Let me explain. I have an old-ass computer that is running Ubuntu 12 (precise), this computer has electrum 2.5.4 installed with a cold-storage wallet that has my private key.
I want to send some bitcoin from that address to a new wallet on my desktop so I can spend the bitcoin. So I installed electrum (newest version 3.3.8) on my desktop, imported the bitcoin address, and created a transaction. Then I sent the transaction to the offline computer out of band, and verified that the out-of-band transmission worked by comparing the hash of the txn file on both the offline and online machines. Then I tried to open the txn file on the offline machine with Electrum 2.5.4. Well, guess what, it didn't work. Electrum 2.5.4 printed to the console:
Traceback (most recent call last):
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/main_window.py", line 2261, in do_process_from_file
self.show_transaction(tx)
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/main_window.py", line 577, in show_transaction
show_transaction(tx, self, tx_desc)
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/transaction_dialog.py", line 37, in show_transaction
d = TxDialog(tx, parent, desc, prompt_if_unsaved)
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum_gui/qt/transaction_dialog.py", line 48, in __init__
self.tx.deserialize()
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum/transaction.py", line 523, in deserialize
d = deserialize(self.raw)
File "/uslocal/lib/python2.7/dist-packages/Electrum-2.5.4-py2.7.egg/electrum/transaction.py", line 454, in deserialize
d[inputs] = list(parse_input(vds) for i in xrange(n_vin))
OverflowError: Python int too large to convert to C long
That's pretty frustrating, the first thing I tried was to install Electrum 2.5.4 on my Desktop and try to create a new unsigned transaction with Electrum 2.5.4. However, this is a no-go because old versions of Electrum cannot connect to Electrum servers any more. So I have to try to update the Electrum on the Offline computer. But I'm not even sure if this is possible considering how ubuntu 12 it's definitely out of support at this point and the offline computer does not even have python3 installed, let alone the GTK stuff or whatever is probably required to run Electrum.
I'm starting to regret choosing a GUI-based wallet for my offline storage considering how hard it is to actually use this and how it simply melts over time... even just 5 years is is enough time to completely melt and destroy this software and make it un-usable. Time Catches All. So now I have to go out and buy a new computer that can run the updated OS, so I can install the new version of Electrum, so I can access my bitcoin.
Do you have any other ideas? Has anyone else experienced anything like this?
submitted by throwaway_23f32f to Electrum [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]

(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]

I think I'm being abused by a blockchain...

Sorry if this is stupid, but someone tipped me $0.42 of bitcoins... thats kind and fun so I downloaded a wallet and its synching (and has been since the beginning of time).
My understanding is that the blockchain I need is 11-12 gb.
Am I seriously downloading 12 gb ($6.00 worth of internets) in order to hold my $0.42 cents?
Thanks!
Edit: I have successfully bumped my magic internet money into a 'lite' wallet. Thanks for all the help guys, honestly I'm shocked at how bloody active and helpful you guys are!
submitted by Surf_Science to Bitcoin [link] [comments]

My wallet is out of sync by over 3 years, why?

Hi, I just recently got a bitcoin wallet.
I bought just under 0.1 BTC earlier and I was waiting for it to appear in my wallet but realised it was out of sync by 3 years and 14 weeks.
It doesn't appear to be snycing, how do I make it sync so I can check my BTC has been delivered?
submitted by timosaurus-rex to Bitcoin [link] [comments]

Question about bitcoin wallets, addresses and mixing.

Hi, I had a couple questions about wallets and addresses and I was hoping you gents could help me out.
As I understand it,
A wallet is just a collection of addresses and keys.
An address is just an alphanumeric string. Bitcoins are "sent" to addresses. To send bitcoins from an address you need the corresponding private key of that address. Multiple addresses can be associated with a private key.
Assume I have two addresses A and B, both associated with a private key C.
  1. Knowing A can someone figure out if B is also associated with C (or if B is associated A)? Therefore, if I wanted to mix bitcoins in A, should I send them to a whole new Addresses-Key pair or is it safe enough to send to B?
  2. Maybe Im missing something, but it seems electrum only allows me to have one addresses-key pair in a wallet file, correct?
Thanks for your help in advance!
submitted by chocolate_elvis to BitcoinBeginners [link] [comments]

Yep, I did it officially.

It was not intentional, not not at all. I sent my 1BTC to my computers assigned bitcoin address, saved the .dat file and formatted my PC and re-installed bitcoin. About to restore my saved .dat file to notice it did not save at all to my external drive (WTF - Crazy moment and recoveries started) to no avail I lost my bitcoin.
Long live in peace!
...
From: https://blockchain.info/address/1H1pcBmQewbvRgUHqSdY9y6UYhRnmN44wN (to...) https://blockchain.info/address/1LTfPacEF2AiES3pFQpk88TFBkbz9Ph7vX
submitted by Sparrow-Sean to Bitcoin [link] [comments]

Transfering code to a different wallet

I'm totally new to bitcoin - I downloaded the bitcoin core wallet without really understanding that these type of wallets require days of synchronising. I've read that online wallets don't require this - is it possible for me to cancel synchronising with bitcoin core and use a different wallet, or do i need to stick with bitcoin core and let it sync to get the bitcoins i've already bought?
Cheers
edit i'm actually really worried this is going to lead to my isp terminating our connection or something, apparently the download is 50gig?! is there any way i can stop it and not lose my bitcoins? :L
submitted by ford_prefect__ to Bitcoin [link] [comments]

Can electrum do multisig from a WIF private key instead of a 24 word seed.

I used to do this in bitcoin-qt.
Say I have bitcoin address addrA that is included as one of the addresses in a 2 of 3 multisig address msAddr. Now if I have the WIF private key for addrA and a partially signed TXN psTxn from msAddr with one of the 3 signatures already attached, is there a way in electrum for me to attach an addrA signature to psTxn?
By "any way" I mean gui clicks, command-line commands or electrum-console scripts.
PS, I also have the requisite redeem script
submitted by brianddk to Electrum [link] [comments]

Groestlcoin June Development Update & Release!

Another Quarter, Another Release! The Groestlcoin production factory has been working overtime as always in order to deliver even more tech to push Groestlcoin mainstream when the time comes.
There have been many new fantastic wallets and exchanges added to Groestlcoins repertoire over the past 3 months so we will re-cap these before moving on to what is new today.

Recap

What's New

Re-forged: Groestlcoin Samourai

Groestlcoin Samourai is a wallet for the streets. A modern Groestlcoin wallet hand-forged to keep your transactions private, your identity masked, and your funds secure. Its main advantages are its extreme portability and is the most secure Groestlcoin mobile HD wallet.
We've built a wallet that Groestlcoin deserves. If you are looking for a wallet that Silicon Valley will never build, the regulators will never allow, and the VC's will never invest in, this is the perfect wallet for you.
![Groestlcoin Samourai Release Video](http://img.youtube.com/vi/i3WU8Tde8XQ/0.jpg)

Head over to the Groestlcoin Samourai Release Page here for the full release announcement.

New: GroestlImage

Groestlimage turns any file into a mnemonic phrase allowing users to generate Groestlcoin private keys and addresses based on the data URI of the provided file. A picture is worth a thousand Groestls.

Features:

Link

https://groestlcoin.org/groestlimage/

Source Code

https://github.com/Groestlcoin/groestlimage

New: Groestlcoin Core Config Generator

Groestlcoin Core Config Generator is a simple GUI to configure the groestlcoin.conf file – A developers dream tool!
Each configuration option is available via the user interface, grouped by what attributes they affect. For ease of getting started with a new configuration, a variety of preset "node classes" are available on the right-hand-side of the screen. Selecting a preset will load our recommended base configuration for a node fitting that description, at which point you can then tune the configuration at the single option level.

Features

Link

https://config.groestlcoin.org/

Source Code

https://github.com/Groestlcoin/groestlcoin-core-config-generator

New: Groestlcoin Dumb Block Explorer

Dumb Block Explorer is a trivial block explorer written in a single PHP file. Now everybody can run their own block explorer.

Features

Link

https://www.groestlcoin.org/explore

Source Code

https://github.com/Groestlcoin/dumb-block-explorer

New: Groestlcoin SMS Push TX

Groestlcoin Simple Push TX is a server to push Groestlcoin transactions via SMS. Now everybody can send new transactions via SMS if the Internet is not usable (i.e. blocked by government entities or becomes otherwise unavailable).

Features

Source Code

https://github.com/Groestlcoin/smspushtx

Update: Electrum-GRS 3.3.6

Electrum-GRS is Groestlcoins #1 thin-client for Windows, MacOS, Linux and Android, based on a client-server protocol. Supporting multi-sig wallets without the bloat of downloading the entire blockchain.

New Features (Universal)

New Features (Windows, MacOS, Linux)

New Features (Android)

Link

https://github.com/Groestlcoin/electrum-grs/releases/download
https://play.google.com/store/apps/details?id=org.groestlcoin.electrumgrs

Source Code

https://github.com/Groestlcoin/electrum-grs
submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

Transcript of Open Developer Meeting in Discord - 5/31/2019

[Dev-Happy] Blondfrogs05/31/2019
Hey everyone. I have opened the channel. So us peeps can talk :smiley:
Hans_Schmidt05/31/2019
Hello !
Tron05/31/2019
Hey all!
I've been on different high-priority project for Medici for last few weeks, but that should wrap up Monday and then I can spend more time on Ravencoin.
Thanks to Scotty for working on BlockBook which was needed for more wallets.
Hans_Schmidt05/31/2019
Good opening. I was going to ask- The last ravend/qt develop Github commit was on May 3rd. Can anyone comment on when work is planned to resume on?
Tron05/31/2019
@[Dev-Happy] Blondfrogs has been working tirelessly on Tags and Restricted Assets.
It is coming along nicely.
It is going to need lots of testing.
Just because there's been lots of changes.
[Dev-Happy] Blondfrogs05/31/2019
@Hans_Schmidt I have moved to my personal github with changes. You can check out my repo on the branch tags to view the latest commits
Tron05/31/2019
Topic: 12-words and time
One of the issues with 12-words on the mobile wallet is that it needs to scan the blockchain to find funds when recovering a wallet.
One proposed idea is to include additional info (optional) like a number that represents the number of weeks since Jan 3, 2009 to start scanning the chain.
Hans_Schmidt05/31/2019
@[Dev-Happy] Blondfrogs I looked at tags. tags last commit was 4/26. Is that correct?
Tron05/31/2019
Another proposal would be to use some of the bits in the 128 bits of entropy generated as a number (instead of entropy).
[Dev-Happy] Blondfrogs05/31/2019
yep. that is correct. I have been working on the Qt element of it, to hopefully aid with testing.
Great idea @Tron
Tron05/31/2019
Example: <96 bits entropy> + <32 bits timestamp>
Or <128 bits entropy> which is the seed and encoded into 12-words, and then a number like 5212 for how many weeks after Jan 3, 2009 to start scanning the chain. This would just speed things up.
Thoughts everyone?
Thoughts anyone?
[Dev-Happy] Blondfrogs05/31/2019
I love it.
Link05/31/2019
It seems a good idea.
ParabolicAssoil - HODL COACH05/31/2019
Pretty smart. I am wondering how Electrum handles it and why we can't use that method. I assume it doesn't work for assets?
[Dev-Happy] Blondfrogs05/31/2019
Most Electrum wallets are light wallets, and don't use the same syncing method that our breadcore wallet uses
Tron05/31/2019
Electrum doesn't work for assets.
Hans_Schmidt05/31/2019
Why does it have to be part of the word seed. Then you have to remember it like a key derivation path. Why not just have the gui ask at what date to start scan?
Tron05/31/2019
Either method of encoding would work and be compatible with any BIP44. With the extra number, you'd ignore it for Coinomi, or JAXX. With the encoding the time into the 12 words, there'd be no change, but you'd lose 32 bits of entropy. 4 Billion times less secure if you knew exactly when the wallet was created.
@Hans_Schmidt That's also an option.
ParabolicAssoil - HODL COACH05/31/2019
Thanks for the answers, gentlemen
Hans_Schmidt05/31/2019
The long term solution in bitcoin for faster more secure SPV is Neutrino protocol.
Tron05/31/2019
What's Neutrino protocol?
Hans_Schmidt05/31/2019
Complicated replacement for bloom filters but has some bitcoin-core pull requests already and being pushed by the Lightning folks.
Tron05/31/2019
Thanks. I'll read about it this weekend.
Hans_Schmidt05/31/2019
For what you need, a gui question is MUCH simpler
[Dev-Happy] Blondfrogs05/31/2019
So @Tron for the 12 words there are two options we are talking about.
  1. Using 12 words in addition to a timestamp to help the mobile wallets sync faster?
  2. Using some about of words and a timestamp to create the private key?
Is this correct>?
Both accomplish the same thing, just implemented in the different way. Faster sync for mobile wallets
traysi05/31/2019
What's the status on messaging?
[Dev-Happy] Blondfrogs05/31/2019
Messaging is complete, we are wrapping it up with the restricted assets release. I am currently buiding the QT gui elements needed for both restricted assets, and messaging.
Tron05/31/2019
@[Dev-Happy] Blondfrogs Yes. They do the same thing. One option potentially reduces security of the 128-bit seed. The other requires writing down an extra number that is optional. 12-words + [optional number] Where the [optional number] just clues in the wallet as to when to start syncing the chain without it having to reference an API.
[Dev-Happy] Blondfrogs05/31/2019
Thanks, If it was me, I would want to not change to many critical elements of the BIP44 protocol so that we can still utilize all current existing packages and libraries that support it.
Hans_Schmidt05/31/2019
Mobile sync- Stay standard Messaging- From what I could tell, at protocol level Message and Memo are the same. Is that correct?
[Dev-Happy] Blondfrogs05/31/2019
Yes.
Tron05/31/2019
Message and memo are the same. The only difference is how the message/memo is interpreted by the clients.
Hans_Schmidt05/31/2019
Thanks
Tron05/31/2019
A memo that is attached to a tx that sends back to origin (for an owner token) is a message that will be displayed by clients. If the client has some of that token.
Sminem05/31/2019
I just came here to say i love you all and keep it up. And also that we are all going to make it bruhs
Hans_Schmidt05/31/2019
Makes sense
𝕿𝖍𝖊 𝕯𝖔𝖓 𝕳𝖆𝖗𝖎𝖘𝖙𝖔 CEO ∞05/31/2019
i got my barber to my some RVN
i did my part
Tron05/31/2019
@Hans_Schmidt Messages make sense or that Sminem loves us all?
Sminem05/31/2019
both
Hans_Schmidt05/31/2019
Yup:smiley:
theking05/31/2019
I know there are a lot of moving parts right now, but what is the current ETA on restricted assets and tags going to testnet?
[Dev-Happy] Blondfrogs05/31/2019
Currently the protocols are complete. However, to make testing easier for the average user, we are working on basic Qt functionality before we will release.
I would say 1-2 weeks of development on the QT side, and we will be ready for testnet
Sminem05/31/2019
What is situation with dividends, i'm dumb
we had BW develop it but he cannot anymore due lack of time
Tron05/31/2019
We will need to re-assign it or do it next.
Sminem05/31/2019
sorry if it has been asked
okey
Tron05/31/2019
No, excellent question.
[Dev-Happy] Blondfrogs05/31/2019
I have been working with a member of the community that has been implementing dividends.
Sminem05/31/2019
nicee
[Dev-Happy] Blondfrogs05/31/2019
I will have more info on that next week
CryptokittyPizzaBoi JON.NETWORK05/31/2019
How is voting coming along?
[Dev-Happy] Blondfrogs05/31/2019
voting was pushed back in order to work on restricted assets.
So voting will be the next phase after testing of the latest build makes it to mainnet
Chill05/31/2019
Just wanted to randomly add that you all rock! It can't be said enough
theking05/31/2019
Awesome news on the timing @[Dev-Happy] Blondfrogs
[Dev-Happy] Blondfrogs05/31/2019
yes sir :smiley:
Any other questions we might be able to answer for you peeps?
Hans_Schmidt05/31/2019
I haven't tried to test tags branch (restricted) on testnet because that would be another fork in a sea of forks. A pre-gui messaging+restricted "official" release would be helpful
[Dev-Happy] Blondfrogs05/31/2019
Yeah, we can do that. I will work on that start this next week. and hopefully we can release testnet sooner.
Hans_Schmidt05/31/2019
Great.
Tron05/31/2019
Any tooling, or 2nd level stuff that's missing that is needed?
[Dev-Happy] Blondfrogs05/31/2019
There are a couple things missing that will help view data but all protocols and consensus should be working and testable
john mclaine05/31/2019
I just want to thank you, and tell you that my contribution will be to write an article in French detailing the entire RAVENCOIN project and its perspectives. IN CODE WE TRUST
[Dev-Happy] Blondfrogs05/31/2019
sounds good @john mclaine
I think we are going to call it for today everyone. Sneak in some questions if you have them in the next minute or so
Tyrantt05/31/2019
Hey guys, I've been around since late Jan 2017 and just want to say that you guys rock. I haven't been following as much lately since I've been busy with life, but was wondering if there is a guesstimation on when the roadmap will be completed
[Dev-Happy] Blondfrogs05/31/2019
Hopefully end of 2019. A nice little holiday miracle.
Daveatt05/31/2019
would be a nice X-mas present indeed. Thanks guys for your hard work. You guys rock
Tyrantt05/31/2019
Wow, that's sooner than I was anticipating. This is a great project and I'm glad that I took a leap of faith with it when I first heard about it. Keep up the good work :)
[Dev-Happy] Blondfrogs05/31/2019
Thanks everyone. Have a great weekend and keep spreading the word of CAAAWWWWWWW
We are out :smiley:
Chill05/31/2019
Best dev team anywhere
Sevvy (just wow)05/31/2019
:beers:
Tron05/31/2019
Thanks all!!!
Seal <:cricat:> Clubber05/31/2019
:bepbep:
submitted by mrderrik to Ravencoin [link] [comments]

Why I will store on Coinbase

I know most of you scoff at the idea of storing BTC on Coinbase, but I am not nearly as technologically inclined as most of you. Each storage suggestion I read looks to me like this:
  1. Download armory and Electrum and run armory from an offline underground bunker.
  2. double encrypt using Eorepadaeuium with 4 USB drives running Linux UEc.3f3.c2q1
  3. backup with Efekjwsf and wefkjlfe + qt and create a public key, private key, and semi-private key.
  4. print private key and public key, but not semi-private key. Laminate printed copies and store in a vault along with 3 of the 4 USB drives. But be sure not to run EFkjlwef foeropwerk.
  5. Use a submarine to bury the vault in the ocean.
  6. A hacker who is %1000 times smarter than you is watching your every move and will steal all your bitcoin if you slip up.
More near computer illiterate people like be are going to be buying BTC, and Coinbase seems like the safer and simpler option.
submitted by TDBit to Bitcoin [link] [comments]

ZCL Electrum Wallet - How to Import/Sweep Private Key Electrum Wallet - Privat Key + Wallet.dat importieren - erster versuch Hack bitcoin (private script) 2019 How to sweep private keys - Using the Electrum Bitcoin ... bitcoin Private keys - puzzle 3,4,5 2019 lucky enough to ...

1. Importing private keys: If you’ve already setup electrum wallet then you cannot import private keys into that wallet. You’ll have to create a new electrum wallet to just import private keys. By importing; the private key and the wallet address associated with it becomes part of the electrum wallet. Your private keys need to be in Wallet Import Format (WIF) or mini private key format. These are standard formats for private keys. More about that here. Note: if the addresses in the originating wallet of the private keys begin with 3 you have to prepend “p2wpkh-p2sh:” to each private key before sweeping it. If the addresses begin with bc1 ... Bitcoin Private Electrum Wallet - How to sweep/import Private Key > Bitcoin Private Electrum Wallet - How to sweep/import Private Key Step 1. Install the Bitcoin Private Electrum Wallet Install the wallet following these instructions , and create a new wallet. Step 2. Go to Wallet - Private Keys - Sweep In this field, paste your private keys. Both Bitcoin Private Keys and Zclassic Private Keys ... Electrum Electrum ist auf Geschwindigkeit und Einfachheit fokussiert und benötigt wenig Ressourcen. Es nutzt entfernte Server, die den komplizierten Teil des Bitcoin-Systems übernehmen und ermöglicht es, mit einer geheimen Phrase wieder Zugriff auf eine Wallet zu bekommen. Features: 2FA × 2FA: Die Zwei-Faktor-Authentifizierung (2FA) ist ein zusätzlicher Schutz für Ihre Wallet. Der erste ... Enter one private key per line. Electrum supports mini private keys and full sized keys in Wallet Import Format ... Found my BTC addresses and private keys using bitcoin QT with commands ‘listaddressgroupings’ and ‘dumpprivkey’ for each. This has provided my with keys starting with L or K. 2. Downloaded Electrum Cash for Mac and setup a wallet using the Address+Private Key import ...

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ZCL Electrum Wallet - How to Import/Sweep Private Key

private Keys (Bitcoins, z.B. aus Armory oder Bitcoin Core) in die Electrum Wallet importieren. Forum: https://www.coinforum.de/ Bitcoin kaufen: https://www.b... Know how to import private key or sweep private key. A quick way to sweep bitcoin private key safely. I've swept my private key using Blockchain.info to show how to do that. bitcoin public key electrum bitcoin private key encoding bitcoin private key explained bitcoin key finder version 1.5 bitcoin key features bitcoin key file bitcoin key finder free bitcoin find key ... Erster versuch eine #Wallet.dat zu importieren in eine #ElectrumWallet, ein Privat Key. Alle Dateien habe ich vorher von meinem Computer gelöscht, so das keine Reste übrig sind die evtl. bei ... Even if you lost the seed, as long as you have the correct private key, you can access your money. This is a useful resource for accessing, securely storing,...

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