How to import keys to bitcoind (Bitcoin QT)?

Reddcoin (RDD) Core Wallet Release - v3.10.0rc4 Core Staking (PoSV v2) Wallet including MacOS Catalina and more!
Reddcoin (RDD) Core Dev team releases v3.10.0rc4 Core Wallet.
Includes full MacOS Catalina support, Bitcoin 0.10 codebase features, security and other enhancements. Full changelog available on github, complete release notes to be published with full 3.10.0 release anticipated shortly.
NOTE: This v3.10.0rc4 code is pre-release, but may be used on mainnet for normal operations. This final "release candidate" version addresses an issue identified where the individual posv v2 stake transaction could be modified such that no funds went to the developer. - See Issue #155 for description. Also includes additional components of enhanced build system; Travis continuous integration (CI) and Transifex translations. Prerelease v3.10.0rc4 binary code is not certificate signed.
To assist in translations, correct text, or add languages, please join the following team: To assist in other aspects of the Reddcoin project, please contact TechAdept or any member of the team.
Bootstrap (zipped folder of blockchain, date of upload 5-1-20) may be downloaded here if required:
Commits included since rc3:
2a8c7e6 Preparations for 3.10.0 rc4 4a6f398 Update translations 7aa5151 build: update reference time to something more recent 1a65b8c Update translations d4a1ca6 transifex: update translation instructions a03895b transifex: update config for this release 51ad1e0 move check before supermajority reached 794680f Make check for developer address when receiving block 457503e travis: Remove group: legacy 97d3a2a travis: Remove depreciated sudo flag 21dcfa6 docs: update release notes 7631aac update error messages 5b41e31 check that the outputs of the stake are correct. 9bd1820 travis: test with wallet enabled 55f2dd5 fix reference to Reddcoin 220f404 travis: disable libs for windows builds (temp) b044e0f depends: qt update download source path 2fe2d85 depends: set new download source 4cf531e remove duplicated entry 0d8d0da travis: diable tests e13ad81 travis: manually disable sse2 support for ARM processors 1f62045 travis: fix crash due to missing (and not required) package 0fb3b75 travis: update path 9d6a642 docs: update travis build status badge with correct path
submitted by TechAdept to reddCoin [link] [comments]

Large-scale updates of Tkeycoin. What’s next? — listing on the crypto exchange. Are you with us?

Large-scale updates of Tkeycoin. What’s next? — listing on the crypto exchange. Are you with us?
Hello, everyone, It’s been a long time since you heard our team, someone thought we were gone, someone was waiting, and someone disappeared himself.
All this time we have worked hard to bring you good news. We will tell you what we have prepared for you, what events will be soon, what you can use right now and what else will be new in the year. And so, let’s go!

Preparing for listing on the exchange

The pandemic period played into the hands of the entire team and we managed to build beauty in our services. In anticipation of the exchange, the team tidied up the sites and services and connected new tools. First of all, we paid attention to the preparation of all services for a foreign audience, taking into account its mentality.
New sections, localizations, nice things, and much more to ensure the most efficient use of the TKEY resource. In addition to the new tabs, the services that we will talk about in this material, there is a special page for representatives of the exchange with the necessary documentation for listing —

Full localization

Already today the official website available in 5 languages: Russian, English, Korean, Chinese (Simplified), Chinese (Traditional).
We made adjustments to the Russian and English versions of the site, including support for Korean and Chinese for each section of the site. Professionals in their field, native speakers translated and adapted the information as it should be, and we, in turn, structured and framed it properly. So welcome!
We will update language support for the site, and soon it will include support for all languages that are available in the mobile app.

QR Codes for Asian Audience
Our friends and residents of Asian countries actively use QR codes in their lives, both when paying in stores and when working with websites. QR codes are used almost everywhere when renting a car or bike, we just open the phone, scan and the mode of transport becomes available for use, anything is available for rent, even a battery, even an umbrella.
“It was a hot May day. Seven-year-old Wang Jiaozui came out of school and saw his grandfather, who came to pick him up. He was standing in the sun, and his shirt was soaked with sweat. Jiaozui invited the grandfather to buy a cold Cola in the shop, but he forgot her purse at home. It turned out that this is not important — the boy took his grandfather’s smartphone and called the payment app with a QR code on the screen.” ©
What to say if QR codes are used even to identify entire farms. By pasting QR codes on farm buildings and then scanning them, government inspectors can quickly figure out who owns the building and whether its owners are violating any laws.
We must be on the trend! Now a special library generates QR codes for the desired page, any tab on the site in Chinese and Korean-accompanied by a QR code that leads to the requested page: fast, convenient, and simple.
Providing this opportunity to our colleagues and future users of Tkeycoin from Asia is a friendly approach and most importantly, a strategic step on our part. After implementing QR codes, we are undoubtedly drawn into the convenience of this function, which we recommend to You:) If you like it, we will make QR codes on the Russian and English versions of the site.

Buying and withdrawing cryptocurrency to a Bankcard
On the site, you can now buy Bitcoin for pound, dollars, euro, and any other currency. This is a powerful automated service for instant exchange of fiat currencies for cryptocurrencies. The system works around the clock and seven days a week, allowing everyone to conduct exchanges at any time of the day and in the shortest possible time.
Withdrawal to a Bank card will be available until the end of the month, we finish the details, the page is available now, and the withdrawal itself will be activated during this week. You can buy Bitcoin, Ethereum, or any other currency right now.
These features are the future for the function of purchasing any product or service for TKEY at any point of sale, which will form the basis of the mobile app, quickly, conveniently, and most importantly, observing the letter of the law.
All we do is build an Empire that is being built before your eyes. Every service and product is connected, so any update promises the appearance of even more cool and effective features than before.

Buying cryptocurrency for pound, dollars, euros, and other currencies

At the end of February, we told you that we are working on building a payment service that will include the provision of services: buy cryptocurrencies, sell a cryptocurrency, withdraw cryptocurrency to Bank cards, etc.
This day has come, now you can buy Bitcoin (BTC), Ethereum (ETH), Tether USDT, Basic Attention Token (BAT), Algorand (ALGO), Tron (TRX), OKB (Token
The purchase is available in any currency: Russian ruble, US Dollar, Euro, British pound, Ukrainian hryvnia, Indonesian rupiah, South Korean won, Japanese yen, Turkish Lira, Argentine peso.
As you can see, the currency corridors are quite extensive, which allows you to make exchanges fast and at a favorable rate. Just choose the right pair to exchange or buy, available fiat currencies: RUB, USD, EUR, GBP, UAH, IDR, KRW, JPY, TRY, ARS, available cryptocurrencies: BTC, ETH, BAT, USDT, ALGO, TRX, OKB.
Even if this wide list does not include the currency you want to buy, such as Bitcoin or USDT, it’s okay — the service will automatically convert your currency into the payment currency and the Bank will make the exchange. Exchanges take place within 1–3 minutes, it is enough to pass quick verification once, which allows you to work with a volume of > 15,000 euros per month.

Exchange of cryptocurrencies for pound, dollars, euros, and withdrawal of Bankcard

In addition to the fact that you can now easily buy a cryptocurrency for fiat currencies, pound, dollars or any other, during this week we will finish work on the withdrawal to a Bank card and you can easily withdraw your profit to the card, the most important thing is that this is a completely legal method, and all operations pass through banks and jurisdictions where work with digital assets is legalized.
This means that when you buy or make a withdrawal to the card, you get legal funds that are credited to you by the Bank or payment system.
If you are used to working with effective tools that work in a new way, or rather correctly and legally, then this service is for you. Fast crediting, easy exchange, a large selection of currency pairs, that’s what the company is betting on.
We work with the most reliable third-party partners to make your cryptocurrency process easy and convenient, and most importantly safe for You. The service supports plastic and virtual Bank cards VISA, MasterCard, MIR, and other payment systems for fast payment processing.
On the exchange page, you can choose any currency pair to exchange in the opposite direction, for example, GBP to BTC or USD to BTC. Choose a suitable pair for exchange, available fiat currencies: RUB, USD, EUR, GBP, UAH, IDR, KRW, JPY, TRY, ARS, available cryptocurrencies for exchange: BTC, ETH, BAT, USDT, ALGO, TRX, OKB.
How it works
When buying cryptocurrency for the first time, your Bank reserves (holds) the requested amount, then this amount is transferred to the authorization waiting state. As soon as the Bank freezes the fiat funds, the service fixes the exchange rate at the time of creating the application, reserves the cryptocurrency, and provides you with 30–40 minutes to complete verification. After successful verification, the service charges cryptocurrency to the wallet.

Quick verification

Verification takes 2–3 minutes and requires only one time to perform operations every day. The “Know Your Customer” (KYC) procedure is necessary to exchange cryptocurrencies for fiat currencies.
As you understand, you need to pass verification 1 time, regardless of whether you withdraw funds or buy currency, after passing verification, all services are available to You without any further confirmation.

New currency

Support for other currencies, including TKEY, will be added gradually and highlighted through service updates. As for the TKEY exchange, it will become available in exchange services after listing on the exchange. Listing on an exchange allows you to automate the exchange process, link the necessary services, and most importantly, the exchange provides liquidity, which is key when we talk about exchanging for a particular currency.
We will tell you more about the operation of the service and its advantages, chips, in a separate material dedicated to the withdrawal and purchase of cryptocurrencies for fiat currencies, as well as touch on various banking issues and tell you how you can combine the SWAP service for more efficient exchange and withdrawal to the card.

Charitable activity

By making an exchange or purchase of cryptocurrency, you help children and people who need our help. We deduct 0.1% of the profit from each transaction to charity funds.
This is the fastest and most comfortable way of charity, which allows you to bring together people who are not indifferent to other people’s problems. TKEY enables people to do good deeds, and the resulting turnover profit of 0.1% is sent to charity funds every month. Together with You, we create new opportunities for people in need who need help — “Big things have small beginnings”.
How does it work?
You have made an exchange or purchase operation, the company has accumulated the volume of these operations for a month->the company has chosen a charity Fund->sent funds to the charity Fund’s account. Priority charity funds are children’s aid funds. You can always suggest a candidate for a particular Fund by sending a message to [[email protected]](mailto:[email protected]).
Why do we write Funds and not a Fund?
This is the first launch of the service, so depending on the monthly volume, we will focus on distributing funds to one charity or several. For example, if we have accumulated $ 10,000, we can distribute $ 5,000 to 2 funds. if we have accumulated $ 100, it is logical that we will only send this amount to 1 Fund. With the development of the service, we will be able to focus on several funds, which we will actively help due to the received volume.

New sections, improvements for existing services

Menu logic and site structure

The menu logic has been revised. now more items are available on the menu and they are divided into sections. Navigation through the sections has become much easier and more convenient. for some sections, QR codes are available for Russian and English-speaking audiences, and for representatives of Asian countries, all sections are available by QR code.


New blocks were added, the entire page was fully localized and is available in Chinese, Korean, English and Russian, and QR codes were added for easy navigation for the Asian audience.

Documentation for the exchange

We have already mentioned that there is a section for exchanges with the necessary documentation for listing, now it is available in English. In the next updates, it will be translated into Russian, Chinese (Traditional and Simplified), and Korean.

Market Data (Coin Data)

The market data section has been optimized for mobile apps. Charts are expanded and optimized page borders for most mobile devices, and you can search for cryptocurrencies and tokens that interest you.


Added answers to frequently asked questions in various sections of the site, You can find the information directly on the section page, for example, TKEY-QT, SWAP or Core. Right on the page there is a FAQ section, in which we disclose answers to questions, for example: How are You going to solve the scalability problem, or why did you choose Phoenix as the logo and symbol of the project, or how do you exchange cryptocurrency for pound or dollars? As you can see, you can get answers to different questions, depending on the topic of the site section.


For convenience, the site’s footer has been expanded and new sections (quick tabs) are included, which are also available in the QR-code format. In addition to various details, the footer is now accompanied by the company’s coat of arms — the Phoenix, which is the symbol of the entire community, the Phoenix Alliance.

Page 404

Added page 404, which is also an integral part of the site. now when you go to a non-existent site page, all the necessary menu items are fully available to us, which will quickly Orient You and direct you to the desired section.

What is waiting for us in the nearest future?

In addition to various improvements, connecting services, our team has been working every day on other main areas of the Tkeycoin project, which are already being prepared for the next release and we will tell you what updates, what plans, events, and what else will be interesting this year.

Online conference with management

An online conference in question-answer format will be organized. The main task of the conference, in addition to questions and answers, is to discuss plans, talk about new directions, touch on issues of legislation, and analyze current issues of users.
The online meeting format will allow you to get feedback and discuss a large number of issues in a short time. Questions related to technical support and other questions that can be answered through the administration will not be discussed.
The meeting involves the development, constructive, and suggestions from users for further development of the Tkeycoin project. If you are interested in participating in the conference, you can also make business proposals during it, please use the time to your advantage. We work for you.

New content: reports, new categories, useful information

Based on user feedback, we introduce new categories to our content plan:
Reports This section will be accompanied by information about the work done by the team for the month, the format of submission — abstracts, highlights. This format will help establish feedback between users and developers.
In addition to the content that we produce ourselves, users have questions that arise during the process of working with the project’s services, as well as during interaction with the project itself. To avoid making guesses and making up stories, we have introduced the question-answer category.
Users ask questions in comments, and the company prepares answers based on the questions and they are published in the post. Depending on the number of questions, the post generates all the answers, or the post is divided into parts if the number of questions for the past period was the largest. In addition to asking questions, you can make suggestions to the project, for example, about new features or directions.
This format also builds feedback and helps to improve all services. the most important thing is that it can not only help us but also you, as the offer and questions will help you focus on the tasks that the end-user wants to see.

TKEY-POOL (Tkeycoin pool)

We are completing the work and debugging of the official pool for Tkeycoin, this is a completely new approach for mining Tkeycoin. The pool will feature higher performance and stable architecture, a light interface, and objective commissions.
A pool is a highly loaded system that works 24/7/365, it turns out that such a product hides a sufficient number of lines of code and, most importantly, is built on a reliable architecture that can withstand +50000–100000 miners, not to mention the number of connected devices for this number of miners.
A cryptocurrency pool is a combination of the hardware power of many miners at once to increase the probability of finding a block. The reward for a block obtained by the pool is distributed among all participants.
The TKEY pool is developed taking into account the features of the Tkeycoin blockchain, including multi-blockchain, transaction model, hashing, blocks, and other nuances that are an upgrade of the blockchain among others. Together with the pool, the TKEY network is being tested: high loads, attacks, and other tests that show positive results, proving that the TKEY blockchain can work under any loads and is protected from attacks.
Our task was to: 1. Stable system for handling high loads; 2. Adaptation pool for any software; 3. Connecting any hardware for mining cryptocurrency Tkeycoin; 4. Fair remuneration calculation; 5. Security.
The main goal is for any user, regardless of the software and hardware used, to be able to connect to Tkeycoin mining via a pool. The first releases will be accompanied by a simple user-friendly interface, easy connection, instructions for various mining programs that can be connected.
In future releases, we will optimize the operation of the pool, add new features, as well as tracking functions and other nice things. any suggestions from miners and the community are interesting to us and will be implemented, so do not hesitate to send your suggestions after the launch.

Work on the TkeySpace mobile app is also not standing still. We will soon release updates for TkeySpace on Android and iOS.
This release is a complete transition to the most stable version of the mobile wallet. This means that after the update, even with the largest changes, the user will not need to completely reinstall or restore to use the new features, as before, just update the app via the AppStore or GooglePlay.
Between the previous update has been a sufficient amount of time, on average, updates are released once a month. This update will be one of the major ones. We are finishing work on the code to prepare the app for the new features that will be available this year. Besides, we are improving the app’s logic, data processing speed, optimizing the code, restoring order, and preparing for the global market.

Exchange, purchase of cryptocurrency and withdrawal to the Debit/Credit Card
In addition to pleasant optimizations, the app will display the exchange and withdrawal to a Bankcard, tab with an optimized page for exchange, withdrawal, and the purchase will be available directly in the mobile app. This upgrade will also capture the cryptocurrency exchange SWAP page, which can be evaluated after the update. Other features and new features will be announced by the developers immediately after the release.

SWAP Update

The development team is finishing work on optimizing the SWAP service. Regardless of updates, it is available in working mode 24/7/365. The team is working on improving the operation, optimizing the page, changing the interfaces, improving navigation, and speeding up query processing. This update is also among the upcoming ones, along with the pool, mobile wallets, and other news that will excite.

Network Statistics

In the network statistics section, there are several sections that will be fixed — this is the hash rate of the network and the volume of Tkeycoin. Now the volume of Tkeycoin is displayed by mTKEY, and the graph itself indicates M TKEY, the user may incorrectly understand the volume of transactions in the network, so, given the current volume, it is advisable to switch the display to TKEY, and in the future switch to mTKEY for large volumes.
TKEY is divided into cryptograms (CryptoGramm, cgr), uTKEY (keys), and mTKEY. 1 TKEY = 100 000 000 cryptograms. 1 mTKEY = 100,000 cryptograms. 1 TKEY contains 1000 mTKEY. 1 mTKEY = 0.00100000 TKEY 1 uTKEY =100 cryptograms 1 TKEY contains 1,000,000 utkeys. 1 uTKEY (keys) = 0.00000100 TKEY 1 cgr = 0.00000001 TKEY

Cryptocurrency Exchange

This issue has become the cause of mass discussions, disputes, investigations, the subject of memes, kitchen, and online conversations, that just did not happen, that TKEY is not taken anywhere, someone made guesses that we are waiting for everyone to run away, or TKEY is a world conspiracy and around some actors, you can write a book or shoot a great series, not worse than Breaking Bad.
Jokes, jokes, but the question is serious. Since the 4th quarter of last year, the company has been actively working on the issue of listing, prepared the necessary platform for this, held several meetings, negotiations, released the necessary products, figured out various transfers of funds to the blockchain, worked out many small things, many major issues that were behind the scenes. Everything is ready, and it’s time to start soon. This will be a surprise, believe it or not, and we will meet you on the stock exchanges :)

What other plans does the company have?

Enabling payment at retail outlets

After entering the exchange, we will actively engage in connecting payments to implement them and link them to TKEY. The plan, strategy, and legal component are ready.

Payment development

This implies the development of payments and services that will expand the use of digital currencies in the commercial sphere. Application on the territory of Russia will depend on the Federal law on the CFA, in any case, we plan to analyze the law, after its release, to find a legal way to implement payments based on blockchain and digital assets. Therefore, until the law is released, we are keeping this initiative in the future, and we will work on other jurisdictions that will support it.
We left some plans behind the scenes, because they will make the greatest impact on the market and the value of our asset, and this — likes silence.

What useful materials will be released soon?

How to effectively use the SWAP service together with the exchange and purchase of cryptocurrency from a Bank card?

We will tell you in detail how to use these 2 services, how to save on payments and purchases, how to exchange tokens that are very difficult to exchange, how to quickly get money for them to the card, and much more.

The law CFA

Our opinion about the law of cryptocurrencies in Russia, what to pay attention to, what to prepare for, how to act if there is a complete ban. Let’s talk about legal nuances and banking practices.

TKEY blockchain

In this material, we will talk about the blockchain, analyze the issues of the system, expand the questions on attacks, payment processing, and touch on the system of multiple chains. The article suggests your suggestions, perhaps someone will have ideas that we will implement in the chain.
At the end,
Don’t forget to ask questions in the comments or send suggestions to [[email protected]](mailto:[email protected]) we will be happy to respond and consider your requests for any of our services. Collaboration, feedback, help us make the whole platform better.
Thank you for being with us! Until new meetings, stay tuned for news, updates, because the most unexpected news comes spontaneously.
submitted by tkeycoin to Tkeycoin_Official [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]

Removed comments/submissions for /u/jigaxx

Hi jigaxx, you're not shadowbanned, but 37 of your most recent 90 comments/submissions were removed. They may be removed automatically by spam filters and not necessarily by human moderators.
Comment (1pts) in CryptoCurrency, "Daily Discussion Megathread - August 10, 2018", (10 Aug 18):
Indeed, they are telling me that my eos tokens are worthless now because I didn't register my tokens on time. I was one of the really early investors on their platform. All gone just like that. What a...
Comment (1pts) in SnowDividends, "Exit scam?", (01 Aug 18):
Thanks! You're the man.
Comment (1pts) in SnowDividends, "Exit scam?", (01 Aug 18):
Yep, looks like it
Comment (1pts) in garlicoin, "Forgive me for I have killed somany garlic.", (20 Jul 18):
Hey friend, no worries. I'll give you the 761 garlic if you tell me how you're going to back them up.
Comment (1pts) in CryptoCurrency, "Daily Discussion Megathread - July 17, 2018", (18 Jul 18):
I've been sucker punched too many times by pumps like these. I'm staying skeptical for now.
Comment (1pts) in CryptoCurrency, "Daily Discussion Megathread - July 11, 2018", (11 Jul 18):
What a fucking nightmare!
Comment (1pts) in CryptoCurrency, "Daily Discussion Megathread - June 22, 2018", (23 Jun 18):
Oh yeah. Sit down and let me tell you a story about the bearwhale fight at $300
Comment (1pts) in CryptoCurrency, "Daily Discussion Megathread - June 12, 2018", (13 Jun 18):
I know, it feels like the downtrend from early 2014 but this one feels waay worse and artificial. Almost like everyone is being waterboarded.
Comment (1pts) in nanocurrency, "feels like it's the same with Nano..", (10 Apr 18):
RemindMe! 3 Years
Comment (1pts) in CryptoCurrency, "List of dividend-paying cryptos", (06 Nov 17):
COSS and Kucoin
Comment (1pts) in CryptoCurrency, "Anything similar to tether?", (16 Jul 17):
Comment (1pts) in videos, "When a male gymnastic coach tries uneven bars.", (20 Dec 14):
Comment (1pts) in Bitcoin, "I love this man: If you've never heard of Bitcoin, "get...", (09 Dec 14):
Right, that enthusiasm. He even forgot to take a puff puff from his weed and the thing went out.
Comment (1pts) in explainlikeimfive, "ELI5: What is the best way/position for humans to sleep? It...", (21 Nov 14):
Lean on the wall.
Comment (1pts) in dogecoin, "The Count Down to the Biggest storm in Doge History has...", (09 Nov 14):
Battle Creek here
Comment (1pts) in Music, "What was the last actual compact disc (not download) you...", (08 Nov 14):
50 cent - Get Rich Or Die Tryin. Year: 2003.
Comment (1pts) in dogecoin, "Doges of the world! [OC!]", (11 Oct 14):
Comment (1pts) in dogecoin, "Dear whales leaving our currency...", (08 Aug 14):
Whales? More like bottom feeders. They get higher profit margins when the prices are low but now I think they've realized the consequences of pressuring the prices towards the bottom. Miners are findi...
Comment (1pts) in dogecoin, "I guess we might see bitcoin race against dogecoin...", (25 Jul 14):
Seal of approval. It means our community is highly regarded by BTC. This imitation is flattering.
Comment (1pts) in dogecoin, "First they ignore you, then they laugh at you, then they...", (16 Jul 14):
First they ignore you, then they laugh at you, then they fight you, then you wow!
Comment (1pts) in flappycoin, "FlappyCoin Qt Wallet 2.0.0 released", (23 Mar 14):
Hello dev. Please follow the instructions from the link below to fix the "libgcc_s_dw2-1.dll" issue:
Comment (1pts) in flappycoin, "I will buy 1 million flaps for 300 doge.", (22 Mar 14):
1 dogecoin = about 123 satoshis
1 flappycoin = 1 satoshi (at current market price)
300 dogecoin = 300 X 123 (which comes out to about 36,900 flappycoin)
Your 300 Doge will get you 36,900 flappy. Wh...
Comment (1pts) in flappycoin, "Stop selling You %@[email protected]", (16 Mar 14):
He's talking about the dipshits selling so low and pilling a huge sell wall and crippling the coin.
Comment (1pts) in flappycoin, "Lets bring up the value of Flappycoin!!!!!!", (05 Mar 14):
Check out Flappy Party. It is a Flappy Bird gambling ring using bitcoin. If we could get them to accept Flappycoin, it will increase our transaction volume.
Comment (1pts) in dogecoin, "Want Coinkite to accept Dogecoin? First to ฿25 wins!", (14 Feb 14):
Did Bitcoin and Litecoin have to pay to be included? If the answer is no, then we shouldn't have to either.
Comment (1pts) in science, "Be Happier: Spend More Money on Others " ... Psychologists...", (06 Feb 14):
I think this phenomenon is happening on a massive scale at /dogecoin
Comment (1pts) in dogecoin, "I love you all my dear shibes <3 :)", (01 Feb 14):
Am I welcome too?
Comment (1pts) in dogecoin, "a few people asked for an sms tipbot so i made one", (27 Jan 14):
Behold, we are witnessing the birth of a killer app.
Comment (1pts) in dogecoin, "a few people asked for an sms tipbot so i made one", (27 Jan 14):
I am not sure if anyone really understands the gravity of this. This is going to be similar to how the M-Pesa system revolutionized finance in East Africa.
Comment (1pts) in dogecoin, "a few people asked for an sms tipbot so i made one", (27 Jan 14):
Tanzania (+255)
Comment (1pts) in dogecoin, "Just found our ticket to the moon", (22 Jan 14):
Yes yes yes! Shut up and take my doge.
Comment (1pts) in dogecoin, "Just wanted everyone to see this link showing our progress...", (20 Jan 14):
Just donated, hope too see them at the Olympics. It would be nice if they could somehow promote dogecoin at the olympics.
Comment (1pts) in explainlikeimfive, "ELI5: Whats the difference between () [] and {} ?", (07 Dec 13):
public class HelloReddit { public static void main(String[] args) { System.out.println("[The] Magic bean store (where my buddy Jerry used to work until he ate too much merchandise: {beans, ornamental ...
Comment (1pts) in gifs, "Downhill longboarding.", (05 Nov 13):
Claremont is another great video
Comment (1pts) in videos, ["Russell Brand Hilariously Embarrases Morning Show H
submitted by MarkdownShadowBot to CommentRemovalChecker [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]

How To Use Coin Control & Stake More With 'PoS' DEAL Coins

How To Use Coin Control & Stake More With 'PoS' DEAL Coins
When you are using Proof of Stake (PoS) coins, active coin control is essential to ensuring that you maximize your PoS rewards. If you do not use coin control you may benefit less from the compounding of your rewards, and you may lose more rewards than necessary when you make a payment from your wallet.
Exactly how much difference this makes will depend on the specifications of the coin itself, and what transactions you make. It is particularly important for coins such as IdealCash, in which small and medium-sized holders must wait a long time between each time they stake and get a reward.
This presents a manual method of coin control for users of Qt wallets!
Why You Need to Use Coin Control
As I already stated, small and medium-sized IdealCash holders must wait a long time before they stake. When you do finally get to stake some coins, you do not get the interest due on your whole balance; instead, one of the payments you have received is selected and you earn the rewards due on that amount. The rest of your interest is not lost, it keeps building up and you get it later. But what this means is that if you receive a single payment for 10,000 coins, for example, you will earn more compound interest than if you receive 10 payments for 1,000 coins, even though your balance is the same. This is because in both cases you will wait the same amount of time before getting your first reward, but in the first instance you will receive all of your interest at once, whereas in the second example you will receive only 10% as much on your first stake. Because you can earn PoS rewards on your PoS rewards (compounding) that mean you will eventually end up with more money in the first example when you got a single payment than you would in the second example where you got 10 payments that added up to the same amount.
In the example above you could easily fix this without getting into any advanced techniques simply by using your wallet in the ordinary way to send yourself 10,000 coins. By doing this you would combine all of the outputs – all 10 of the 1,000 IdealCash payments – into a single output. But sometimes things can be a little more complicated. For example, let's say you receive a single payment of 10,000 coins, and leave it in your wallet to stake. After 8 weeks you still haven’t earned your first reward, but have built up a nice bit of ‘interest owed’ on these coins. You now receive those 10 payments for 1,000 each we looked at before. When you spend any coins in your wallet, you lose the unpaid rewards owed to you for staking them. So in this example, you would want to send a 10,000 IdealCash payment to yourself using these 10 new payments. But if you simply use the wallet as normal to send a payment to yourself it will probably not do this – it will use the 10,000 you got in your first deposit, destroying your earned rewards and doing nothing to consolidate the smaller payments. To do this, you need to be able to specify which outputs (which payments received) you want to use to create your transaction; that is what I am going to show you how to accomplish in this guide.
Coin control can also be useful when sending payments from your wallet. By specifying which outputs to use in order to make a payment you can ensure that you are not losing rewards unnecessarily. Please be aware, however, that when sending payments to somebody else you will probably need to send yourself change because each output is used entirely in each transaction. I will explain this properly later on in the guide, but for now just be aware that if you don’t do this you may lose some of your coins.
Manual Coin Control Using the Qt Wallet Console
Manual coin control requires you to use the console rather than the GUI. That means instead of just selecting options from menus, you have to manually type commands. These commands must be precise and use the correct grammar or they won’t work, so please read the instructions carefully and check that you have typed each command correctly before hitting enter.
To open a console window you just need to click ‘Help’ from the navigation menu of your wallet, then select ‘Debug Window’. This will open up a new window with two tabs: click ‘console’ to get to the tab that we are going to use here.
Step One: List Unspent Outputs In your console window type “listunspent” (without the quotation marks) and hit enter. This will give you a list of all the outputs of previous transactions which belong to you, or in more plain language, all of the payments that you have received.
Each one will appear between curly brackets and should look something like this:
"txid" : "a long list of random looking characters should be here",
"vout" : "this should be a number",
"address" : "this is the IdealCash address belonging to you that these coins where sent to",
"account" : "",
"scriptPubKey" : "another long list of random looking characters",
"amount" : "the number of coins you received",
"confirmations" : "the number of confirmations for this transaction"
You can use this list to select the outputs you want to use to make a payment. For example, IdealCash owners may want to select smaller and newer outputs (newer outputs will have fewer confirmations) and leave any older and larger ones.
When you have chosen which ones you want to use, make a note of the exact “amount” for each one. If you have received coins with more than one address then you will also need a list of each address that appears in one of the outputs you are going to use.
Once you have made a note of these things separately, we only need the “txid”, “vout” and “scriptPubKey” to put into the next step. You may like to copy and paste each one into a text editor and then delete every line apart from those three, to leave something like this:
"txid" : "a long list of random looking characters should be here",
"vout" : "this should be a number",
"scriptPubKey" : "another long list of random looking characters"
Notice that I have removed the comma from the end of the “scriptPubKey” line. Commas must always be included at the end of each line, apart from the last one. This is one of those annoying grammar things that you have to get right (and which I personally mess up more often than not). Don’t worry too much, if you get this kind of thing wrong you won’t lose any coins, it just won’t accept the command. Also please note that if you are not a programmer then you officially will be after you’ve done this, so feel free to be a bit proud of yourself.
Creating a Raw Transaction
The next step is to use the outputs we have selected to build the code for a complete transaction.
You should have a list of edited outputs from the last section. Put them, complete with brackets, into the command below:
createrawtransaction '[output1, output2]' '{"address you want to send coins to" : number of coins to send}' The number of coins you are sending must be exactly equal to total of all the outputs you have used minus the transaction fee (0.01). It is very important that you get this right as you could lose coins if you make a mistake here. For example, if you have one output with an amount of 1,000 and another with an amount of 2,000 then you must send 2999.99 coins (1000+2000-0.01). If you were to make a mistake and send just 2,000 coins, then you would end up paying a fee of 1,000 coins that you would never see again.
To give you an idea of what this should look you can see an example of a raw bitcoin transaction taken from this Reddit thread below:
createrawtransaction '[{"txid":"c7e5e03d2ab5458819eedec46d0ba38ca7a6525e38b493073277cf4a1550a348","vout":1,"scriptPubKey":"76a9144a06df74729aef1dce5e4641960da3a439d2460b88ac"},
IdealCash and most other altcoins will use the exact same format. In this example you can hopefully see that two addresses are listed to send coins to, with an amount for each one and a comma between them. If you are manually creating a transaction to send coins to somebody else then you will probably need to do this, because you will probably need to select outputs which add up to more than the amount you want to send, and then send the change to yourself. For example, you may have outputs of 10 and 15, but you want to send 20 coins – so you need to send the remaining 5 to your own address, otherwise they will be added to the transaction fee and lost.
When you have pasted this command into the console and hit enter, if you have managed to get all the grammar right, then you will get a long list of random looking characters as a response. This is your ‘raw transaction hex code’. Copy this for use in the next step.
Signing Your Transaction
You now need to sign your transaction with the private keys of all addresses used in the outputs you chose earlier. You can find your private key for any address using the following console command:
Obviously, you should replace
with the public address you want to get the private key for. If you have encrypted your wallet then you will need to unlock it before doing this.
You can now sign your raw transaction using the following command:
signrawtransaction 'your hex code generated in the last step' '[output1, output2]' '["privatekeyone", "privatekeytwoifneeded"]'
The middle section with output1 and output2 should be exactly the same as you used in the last step when you created the raw transaction.
When you hit the enter button on that command you will get a new, signed hex code. Copy and paste that into the final command:
Sending Your Transaction
The last bit is easy:
sendrawtransaction 'your signed hex code' When you hit enter on that final command your transaction will be broadcast to the network and your console will reply with a transaction id. If you have used this to send coins to yourself in order to consolidate smaller payments for staking, then your wallet GUI should now show ‘payment to yourself -0.01’.
submitted by Tyler__Z to IdealCash [link] [comments]

Interested in contributing to the BTC network? Here is the steps to get a full node up and running in Linux.

These instructions will work both on a VPS cloud server or a personal computer. You may find cheap VPS somewhere online for rent.
What Is A Full Node?
A full node is a program that fully validates transactions and blocks. Almost all full nodes also help the network by accepting transactions and blocks from other full nodes, validating those transactions and blocks, and then relaying them to further full nodes.
Most full nodes also serve lightweight clients by allowing them to transmit their transactions to the network and by notifying them when a transaction affects their wallet. If not enough nodes perform this function, clients won’t be able to connect through the peer-to-peer network—they’ll have to use centralized services instead.
Many people and organizations volunteer to run full nodes using spare computing and bandwidth resources—but more volunteers are needed to allow Bitcoin to continue to grow. This document describes how you can help and what helping will cost you.
Costs And Warnings
Running a Bitcoin full node comes with certain costs and can expose you to certain risks. This section will explain those costs and risks so you can decide whether you’re able to help the network.
Special Cases
Miners, businesses, and privacy-conscious users rely on particular behavior from the full nodes they use, so they will often run their own full nodes and take special safety precautions. This document does not cover those precautions—it only describes running a full node to help support the Bitcoin network in general.
Please consult an expert if you need help setting up your full node correctly to handle high-value and privacy-sensitive tasks.
Secure Your Wallet
It’s possible and safe to run a full node to support the network and use its wallet to store your bitcoins, but you must take the same precautions you would when using any Bitcoin wallet. Please see the securing your wallet page for more information.
Minimum Requirements
Bitcoin Core full nodes have certain requirements. If you try running a node on weak hardware, it may work—but you’ll likely spend more time dealing with issues. If you can meet the following requirements, you’ll have an easy-to-use node.
Note: many operating systems today (Windows, Mac, and Linux) enter a low-power mode after the screensaver activates, slowing or halting network traffic. This is often the default setting on laptops and on all Mac OS X laptops and desktops. Check your screensaver settings and disable automatic “sleep” or “suspend” options to ensure you support the network whenever your computer is running.
Possible Problems
Legal: Bitcoin use is prohibited or restricted in some areas.
Bandwidth limits: Some Internet plans will charge an additional amount for any excess upload bandwidth used that isn’t included in the plan. Worse, some providers may terminate your connection without warning because of overuse. We advise that you check whether your Internet connection is subjected to such limitations and monitor your bandwidth use so that you can stop Bitcoin Core before you reach your upload limit.
Anti-virus: Several people have placed parts of known computer viruses in the Bitcoin block chain. This block chain data can’t infect your computer, but some anti-virus programs quarantine the data anyway, making it more difficult to run a full node. This problem mostly affects computers running Windows.
Attack target: People who want to disrupt the Bitcoin network may attack full nodes in ways that will affect other things you do with your computer, such as an attack that limits your available download bandwidth or an attack that prevents you from using your full node’s wallet for sending transactions.
Linux Instructions
The following instructions describe installing Bitcoin Core on Linux systems.
Ubuntu 14.10 Instructions for Bitcoin Core 0.10.0.
If you use Ubuntu Desktop, click the Ubuntu swirl icon to start the Dash and type “term” into the input box. Choose any one of the terminals listed:
Alternatively, access a console or terminal emulator using another method, such as SSH on Ubuntu Server or a terminal launcher in an alternative desktop environment.
Type the following line to add the Bitcoin Personal Package Archive (PPA) to your system:
sudo apt-add-repository ppa:bitcoin/bitcoin
You will be prompted for your user password. Provide it to continue. Afterwards, the following text will be displayed:
Stable Channel of bitcoin-qt and bitcoind for Ubuntu, and their dependencies
More info:
Press [ENTER] to continue or ctrl-c to cancel adding it
Press enter to continue. The following text (with some variations) will be displayed and you will be returned to the command line prompt:
gpg: keyring /tmp/tmpixuqu73x/secring.gpg' created gpg: keyring/tmp/tmpixuqu73x/pubring.gpg' created gpg: requesting key 8842CE5E from hkp server > > > > gpg: /tmp/tmpixuqu73x/trustdb.gpg: trustdb created gpg: key 8842CE5E: public key "Launchpad PPA for Bitcoin" imported gpg: no ultimately trusted keys found gpg: Total number processed: 1 pg: imported: 1 (RSA: 1) OK
Type the following line to get the most recent list of packages:
sudo apt-get update
A large number of lines will be displayed as different update files are downloaded. This step may take several minutes on a slow Internet connection.
To continue, choose one of the following options
sudo apt-get install bitcoin-qt
sudo apt-get install bitcoind
sudo apt-get install bitcoin-qt bitcoind
After choosing what packages to install, you will be asked whether you want to proceed. Press enter to continue.
If you’re logged in as an administrative user with sudo access, you may log out. The steps in this section should be performed as the user you want to run Bitcoin Core. (If you’re an expert administrator, you can make this a locked account used only by Bitcoin Core.)
Before using the Bitcoin Core daemon, bitcoind, you need to create its configuration file with a user name and password. First create the .bitcoin directory, create (touch) the file, and set the file’s permissions so that only your user account can read it. From the terminal, type:
mkdir ~/.bitcoin touch ~/.bitcoin/bitcoin.conf chmod 600 ~/.bitcoin/bitcoin.conf
Then you can run the command bitcoind. It will print output similar to this:
bitcoind Error: To use the "-server" option, you must set a rpcpassword in the configuration file: /home/bitcoinorg/.bitcoin/bitcoin.conf It is recommended you use the following random password: rpcuser=bitcoinrpc rpcpassword=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX (you do not need to remember this password)
The username and password MUST NOT be the same.
If the file does not exist, create it with owner-readable-only file permissions. It is also recommended to set alertnotify so you are notified of problems; for example: alertnotify=echo %s | mail -s "Bitcoin Alert" [email protected] The “rpcpassword” displayed will be unique for your system. You can copy the rpcuser and rpcpassword lines into your configuration file using the following commands. Note that in most Ubuntu terminals, you need to press Ctrl-Shift-C to copy and Ctrl-Shift-V to paste because Ctrl-C and Ctrl-V have different meanings in a Unix-style terminal.
echo rpcuser=bitcoinrpc >> ~/.bitcoin/bitcoin.conf echo rpcpassword=XXXXXX >> ~/.bitcoin/bitcoin.conf (Warning: Don’t use XXXXXX as your RPC password. Copy the rpcpassword displayed by bitcoind for your system.)
Now you can start Bitcoin Core daemon for real. Type the following command:
bitcoind -daemon
It will print a message that Bitcoin Core is starting. To interact with Bitcoin Core daemon, you will use the command bitcoin-cli (Bitcoin command line interface). Note: it may take up to several minutes for Bitcoin Core to start, during which it will display the following message whenever you use bitcoin-cli:
error: {"code":-28,"message":"Verifying blocks..."}
After it starts, you may find the following commands useful for basic interaction with your node:
to safely stop your node, run the following command:
bitcoin-cli stop
A complete list of commands is available in the developer reference.
When Bitcoin Core daemon first starts, it will begin to download the block chain. This step will take at least several hours, and it may take a day or more on a slow Internet connection or with a slow computer. During the download, Bitcoin Core will use a significant part of your connection bandwidth. You can stop Bitcoin Core at any time using the stop command; it will resume from the point where it stopped the next time you start it.
Optional: Start Your Node At Boot
Starting your node automatically each time your computer boots makes it easy for you to contribute to the network. The easiest way to do this is to start Bitcoin Core daemon from your crontab. To edit your crontab, run the following command:
crontab -e
@reboot bitcoind -daemon Save the file and exit; the updated crontab file will be installed for you. Now Bitcoin Core daemon will be automatically started each time your reboot your computer.
If you’re an Ubuntu expert and want to use an init script instead, see this Upstart script.
You have now completed installing Bitcoin Core. If you have any questions, please ask in one of Bitcoin’s many communities, such as Bitcoin StackExchange, BitcoinTalk technical support, or the #bitcoin IRC chatroom on Freenode.
To support the Bitcoin network, you also need to allow incoming connections. Please read the Network Configuration section for details.
Network Configuration
If you want to support the Bitcoin network, you must allow inbound connections.
When Bitcoin Core starts, it establishes 8 outbound connections to other full nodes so it can download the latest blocks and transactions. If you just want to use your full node as a wallet, you don’t need more than these 8 connections—but if you want to support lightweight clients and other full nodes on the network, you must allow inbound connections.
Servers connected directly to the Internet usually don’t require any special configuration. You can use the testing instructions below to confirm your server-based node accepts inbound connections.
Home connections are usually filtered by a router or modem. Bitcoin Core will request your router automatically configure itself to allow inbound connections to Bitcoin’s port, port 8333. Unfortunately many routers don’t allow automatic configuration, so you must manually configure your router. You may also need to configure your firewall to allow inbound connections to port 8333. Please see the following subsections for details.
Testing Connections
The BitNodes project provides an online tool to let you test whether your node accepts inbound connections. To use it, start Bitcoin Core (either the GUI or the daemon), wait 10 minutes, and then visit the GetAddr page ( The tool will attempt to guess your IP address—if the address is wrong (or blank), you will need to enter your address manually.
For more instruction and reviews based off BTC please follow my subreddit /BTC_Reviews
all material from this post was found here -->
submitted by Mattjhagen to Bitcoin [link] [comments]

A Guide to Keeping Keys Offline Using Armory +rPi

Hi Redditors.
I am going to post in this thread my experiences in getting my Desktop (Debian) machine running Armory in watch-only mode, and coupling that with an offline Raspberry Pi (which holds my private keys) for signing the transactions previously made in watch-only mode.
I actually compiled Armory from source directly on my Pi. This guide is probably more for the bitcoin 'power user', as to run Armory online, and broadcast the signed transactions, you need to have a bitcoin full node running (bitcoind).
Basic requirements:
Aimed-for Setup:
I'll post the guide in digestible sections...

Section 1

I should begin by saying I installed source code from git, and got Armory to build the DB on my desktop initially, WITHOUT creating a wallet.. (This allowed me to debug what was going on a little!)
Go to, select Armory..
It leads to a Download from Git:
Followed the procedure for Linux Debian verify code, compile, install, all straight-forward..
Began by running bitcoind, and telling Armory where to find it. This is the command I used, obviously it was all on one line and didn't include the arrows/explanations!:
python \ --satoshi-datadir=/BlockChain/chain20180414/blocks \ # <-----(where my bitcoind blocks live) --datadir=/ArmoryDataDi \ # <-----(this is instead of ~/.armory) --dbdir=/ArmoryDataDidatabases # <-------(again, non std. place used for Armory's databases.. my choice.) 
So, on the Desktop, after the initial "build databases"
(NB the initial "Build Databases" took about 1.5h and my two CPUs were maxed the whole time, Temps up to 62C. Not ideal; Im not in a rush!)
I then wanted to import a watch-only wallet.
Before I did this, I took a full backup of the Armory data dir:
(or ~/.armory in a default installation).
I'd hate to have to make Armory do another full sync with the bitcoind node!

Section 2

Next step: offline wallet (with Private Keys) is on a Raspberry Pi.
I downloaded the source and managed to compile it on the pi itself! :)
Though there were some gymnastics needed to setup the Pi.
My Pi is running Raspbian based on Wheezy.. quite old!
I did the following on the Pi:
apt-get update apt-get upgrade (<---took about an hour!) apt-get install autotools-dev apt-get install autoconf 
Then I followed the instructions exactly as I had done for my Debian Desktop machine, EXCEPT:
I had to increase the Pi's swap space. I upped it from 100Mb to 400Mb.
The compilation took 7 hours, and my poor SD card got a thrashing.
But after compilation, I put the Swap back to 100Mb and Armory runs ok with about 150Mb of memory (no swap needed).
Swap increase on the Pi:
use your favourite editor, and open the file /etc/dphys-swapfile
add/change the following line:
Then, REBOOT the Pi:
sudo shutdown -h -P now 
Once the compilation was done on the Pi, put the swap back, rebooted and created an Armory wallet.
I added manual entropy and upped the encryption 'time' from 250ms to 2500ms - since the Pi is slow, but I'll be happy to wait for more iterations in the Key Derivation Function.
Once the wallet was created, it obviously prompts you for backup.
I want to add a private key of my own (i.e. import), so don't do the backup until this is over.
I import my Private Key, and Armory checks that this corresponds to a Public Key, which I check is correct.
This is the point now where the Pi storage medium (e.g an SD card) has to be properly destroyed if you ever get rid of it.
I had thought that now would be a good time to decide if your new wallet will generate Segwit receiving addresses, and also addresses used to receive 'change' after a transaction..
But it seems Armory WON'T let you switch to P2SH-P2WPKH unless your Armory is connected to a node offering "WITNESS" service.
Obviously, my Pi is offline and will never connect to a node, so the following will not work on the Pi:
NB: I thought about setting this on the Debian "watch-only" wallet, but that would surely mean doom, as the Pi would not know about those addresses and backups might not keep them.. who knows...
So, end result:- no segwit for me just yet in my offline funds.

--If anyone can offer a solution to this, I'd be very grateful--

Section 3

Ok, now this is a good point to back up your wallet on the Pi. It has your imported keys. I choose a Digital Backup - and put it on a USB key, which will never touch the internet and will be stored off-site. I also chose to encrypt it, because I'm good with passwords..
NB: The Armory paper backup will NOT back up your imported private keys, so keep those somewhere if you're not sweeping them. It would be prudent to have an Armory paper backup anyway, but remember it will likely NOT help you with that imported key.
Now for the watch-only copy of the wallet. I want to get the "watch-only" version onto my Desktop Debian machine.
On the Pi, I created (exported to a USB key) a "watching-only" copy of my wallet.
I would use the RECOMMENDED approach, export the "Entire Wallet File".
As you will see below, I initially exported only the ROOT data, which will NOT capture the watching-only part of the Private Key I entered manually above (i.e. the public Key!).
Now, back on the Debian Desktop machine...
I stopped all my crontab jobs; just give Armory uninterrupted CPU/memory/disk...
I also stopped bitcoind and made a backup prior to any watch-only wallet being imported.
I already made a backup of Armory on my Desktop, before any wallet import.
(this was needed, as I made a mistake.. see below)
So on the Debian Desktop machine, I begin by firing up bitcoind.
my command for this is:
./bitcoind -daemon -datadir=/BlockChain/chain20180414 -dbcache=400 -maxmempool=400 

Section 4

I try running Armory like this:
(I'm actually starting Armory from a script -
Inside the script, it has the line:
python --ram-usage=4 --satoshi-datadir=/BlockChain/chain20180414/blocks --datadir=/ArmoryDataDi --dbdir=/ArmoryDataDidatabases 
I know from bitter experience that doing a scan over the blockchain for a new wallet takes a looong time and a lot of CPU, and I'd like it to play nicely; not gobble all the memory and swap and run my 2xCPUs both at 100% for four hours...
So... I aim to run with --ram-usage=X and --thread-count=X
(For me in the end, X=1 but I began with X=4)
I began with --ram-usage=4 (<--- = 4x128Mb)
The result is below...
TypeError: cannot concatenate 'str' and 'int' objects 
It didn't recognise the ram-usage and carried on, crippling my Debian desktop PC.
This is where it gets dangerous; Armory can gobble so much memory and CPU that the windowing environment can cease up, and it can take over 30 minutes just to exit nicely from bitcoind and ArmoryDB.
So, I ssh to the machine from another computer, and keep an eye on it with the command
"free -h" 
I'd also be able to do a "sudo reboot now" if needed from here.

Section 5

So, trying to get my --ram-usage command recognised, I tried this line (added quotes):
python --ram-usage="4" --satoshi-datadir=/BlockChain/chain20180414/blocks --datadir=/ArmoryDataDi --dbdir=/ArmoryDataDidatabases 
But no, same error...
Loading Armory Engine: Armory Version: 0.96.4 Armory Build: None PyBtcWallet Version: 1.35 Detected Operating system: Linux OS Variant : ('debian', '9.4', '') User home-directory : /home/ Satoshi BTC directory : /BlockChain/chain20180414 Armory home dir : /ArmoryDataDi ArmoryDB directory : /ArmoryDataDidatabases Armory settings file : /ArmoryDataDiArmorySettings.txt Armory log file : /ArmoryDataDiarmorylog.txt Do wallet checking : True (ERROR) - Unsupported language specified. Defaulting to English (en) (ERROR) - Failed to start Armory database: cannot concatenate 'str' and 'int' objects Traceback (most recent call last): File "", line 1808, in startArmoryDBIfNecessary TheSDM.spawnDB(str(ARMORY_HOME_DIR), TheBDM.armoryDBDir) File "/BitcoinArmory/", line 387, in spawnDB pargs.append('--ram-usage=' + ARMORY_RAM_USAGE) TypeError: cannot concatenate 'str' and 'int' objects 

Section 6

So, I edit the Armory python file
if ARMORY_RAM_USAGE != -1: pargs.append('--ram-usage=4') #COMMENTED THIS, SO I CAN HARDCODE =4 # ' + ARMORY_RAM_USAGE) 
Running it, I now have acknowledgement of the --ram-usage=4:
(WARNING) - Spawning DB with command: /BitcoinArmory/ArmoryDB --db-type="DB_FULL" --cookie --satoshi-datadir="/BlockChain/chain20180414/blocks" --datadir="/ArmoryDataDi" --dbdir="/ArmoryDataDidatabases" --ram-usage=4 
Also, even with ram-usage=4, it used too much memory, so I told it to quit.
It took over 30 minutes to stop semi-nicely. The last thing it reported was:
ERROR - 00:25:21: (StringSockets.cpp:351) FcgiSocket::writeAndRead FcgiError: unexpected fcgi header version 
But that didn't seem to matter or corrupt the Armory Database, so I think it's ok.
So, I get brave and change as below, and I make sure my script has a command line for --ram-usage="ABCDE" and --thread-count="FGHIJ"; the logic being that these strings "ABCDE" will pass the IF criteria below, and my hardcoded values will be used...
if ARMORY_RAM_USAGE != -1: pargs.append('--ram-usage=1') #COMMENTED THIS, SO I CAN HARDCODE =1 # ' + ARMORY_RAM_USAGE) if ARMORY_THREAD_COUNT != -1 pargs.append('--thread-count=1') #COMMENTED THIS, SO I CAN HARDCODE =1 #' + ARMORY_THREAD_COUNT) 
So, as usual, I use my script and start this with: ./
(which uses command line:)
python --ram-usage="ABCDE" --thread-count="FGHIJ" --satoshi-datadir=/BlockChain/chain20180414/blocks --datadir=/ArmoryDataDi --dbdir=/ArmoryDataDidatabases 
(this forces it to use my hard-coded values in
So, this is the command which it reports that it starts with:
(WARNING) - Spawning DB with command: /BitcoinArmory/ArmoryDB --db-type="DB_FULL" --cookie --satoshi-datadir="/BlockChain/chain20180414/blocks" --datadir="/ArmoryDataDi" --dbdir="/ArmoryDataDidatabases" --ram-usage=1 --thread-count=1 
Again, this is where it gets dangerous; Armory can gobble so much memory and CPU that the windowing environment can cease up. So I ssh to the machine and keep an eye on it with:
"free -h" 

Section 7

So, on the Debian Desktop PC, I inserted the USB stick with the watch-only wallet I exported from the Pi.
Start Armory...
Import "Entire Wallet File" watch-only copy.
Wait 4 hours..
After running Armory for about 30m, the memory usage dropped by 400m... wierd...
It took ~2 hours to get 40% completion.
After 3.5 hours it's almost there...
The memory went up to about 1.7Gb in use and 900Mb of Swap, but the machine remained fairly responsive throughout, apart from a few (10?) periods at the start, where it appeared to freeze for 10-30s at a time.
(That's where my ssh session came in handy - I could check the machine was still ok with a "free -h" command)
Now, I can:
Create an unsigned transaction on my Desktop,
Save the tx to USB stick,
Move to the Pi,
Sign the tx,
Move back to the Desktop,
Broadcast the signed tx.

Section 8

My initial Mistake:
This caused me to have to roll-back my Armory database, using the backup. so you should try to avoid doing this..
On the Pi, I exported only the ROOT data, which will NOT capture the watching-only part of the Private Key
It is RECOMMENDED to use the Digital Export of Entire Wallet File from the Pi when making a watch-only copy. If you just export just the "ROOT data", not the "Entire Wallet File", you'll have problems if you used an imported Private Key in the offline wallet, like I did.
Using the ROOT data text import, after it finished... my balance was zero. So,. I tried a Help->Rescan Balance (Restart Armory, takes 1minute to get back up and running) No Luck. Still zero balance.
So, I try Rescan Databases.. This will take longer. Nah.. no luck.
So, I tried again, thinking it might be to do with the fact that I imported the text "root data" stuff, instead of following the (Recommended) export of watching-wallet file.
So, I used my Armory backup, and wound back the ArmoryDataDi to the point before the install of the (zero balance) wallet. (you should not need to do this, as you will hopefully use the RECOMMENDED approach of exporting the "Entire Wallet File"!)
submitted by fartinator to Bitcoin [link] [comments]

[Reupload][Tutorial] Install Armory Wallet 0.96.4 on Fedora Workstation 29

note: I had to reupload this because reddit is banning my original account for no reason. I appealed but I thought maybe someone wanted to have this content online.
Armory is a very cool open source bitcoin wallet for the power user. You can do neat things with it, read here:
Disclaimer: follow these steps at your own risk. I am not responsible for any damage / loss of funds you might face for following or not following correctly my instructions here. I may have made a typo somewhere or be wrong so do your own research and learn for yourself what I am doing at each step, and what consequences may have for you, at your own risk. These instructions may be wrong somewhere. It worked for me, it doesn't mean it has to work for you.
Requirements for this tutorial:
We are going to build the code from source.
Install dependencies.
I followed these instructions to find the equivalent Fedora packages:
Open the terminal app and run this command:
sudo dnf install git nano qt qt-devel python-devel libtool pyqt4 pyqt4-devel lmdb swig 
And more python packages that I had to install:
sudo pip install twisted qt4reactor psutil 
Importing the signing key to verify the software
Install KGPG to easily manage keys.
sudo dnf install kgpg 
Go to
and copy paste the code below the title from
both included. Then open KGPG from terminal with
kgpg -k 
and click 'Import Key...' > Clipboard > Ok . You should see a confirmation message. Double check the info and close the dialog.
Repeat the process with this other key:
You can verify both keys are mentioned at the Armory webpage.
Clone and compile the code plus some edits
Before, we installed some dependencies that are named differently than the equivalent Ubuntu/Debian package specified at the Armory documentation. The build process fails for Fedora as the name for the dependency during checks won't match the Fedora version. There's this pull request addressing that, but the code is not part of any release yet.
So the fastest workaround (maybe a bit dirty) was to edit the build config file and correct the name for my Fedora install. Let's begin.
Clone the Armory repository
git clone 
Enter the BitcoinArmory dir
cd BitcoinArmory 
Switch to release code
git checkout 'v0.96.4' 
Verify commit signature
git tag -v 'v0.96.4' 
you should see the following message:
> object fee1f91a3137ef1056e15cc606a186b0e508f84c > type commit > tag v0.96.4 > tagger goatpig  1522530739 +0200 > > v0.96.4 > gpg: Signature made Sat 31 Mar 2018 11:12:19 PM CEST > gpg: using RSA key 8C5211764922589A > gpg: Good signature from "goatpig (Offline signing key for Armory releases) " > gpg: WARNING: This key is not certified with a trusted signature! > gpg: There is no indication that the signature belongs to the owner. > Primary key fingerprint: 745D 707F BA53 968B DF63 AA8D 8C52 1176 4922 589A 
if it looks the same, everything is ok.
Edit the file 'Makefile' file with
gedit Makefile 
And click the three dot menu > Find and Replace...
Configure the options as follows:
Click Replace All and close.
Go back to the terminal and run the following commands in order from inside the BitcoinArmory dir. Wait for the previous one to finish before running the next one:
if everything finishes without error you are all done! Run this to start Armory:
python ./ 
you are all set. Please let me know if I missed something.
submitted by RedditShadowbangedMe to Bitcoin [link] [comments]

[Tutorial] Install Armory Wallet 0.96.4 on Fedora Workstation 29

Armory is a very cool open source bitcoin wallet for the power user. You can do neat things with it, read here:
Disclaimer: follow these steps at your own risk. I am not responsible for any damage / loss of funds you might face for following or not following correctly my instructions here. I may have made a typo somewhere or be wrong so do your own research and learn for yourself what I am doing at each step, and what consequences may have for you, at your own risk. These instructions may be wrong somewhere. It worked for me, it doesn't mean it has to work for you.
Requirements for this tutorial:
We are going to build the code from source.
Install dependencies.
I followed these instructions to find the equivalent Fedora packages:
Open the terminal app and run this command:
sudo dnf install git nano qt qt-devel python-devel libtool pyqt4 pyqt4-devel lmdb swig 
And more python packages that I had to install:
sudo pip install twisted qt4reactor psutil 
Importing the signing key to verify the software
Install KGPG to easily manage keys.
sudo dnf install kgpg 
Go to
and copy paste the code below the title from
both included. Then open KGPG from terminal with
kgpg -k 
and click 'Import Key...' > Clipboard > Ok . You should see a confirmation message. Double check the info and close the dialog.
Repeat the process with this other key:
You can verify both keys are mentioned at the Armory webpage.
Clone and compile the code plus some edits
Before, we installed some dependencies that are named differently than the equivalent Ubuntu/Debian package specified at the Armory documentation. The build process fails for Fedora as the name for the dependency during checks won't match the Fedora version. There's this pull request addressing that, but the code is not part of any release yet.
So the fastest workaround (maybe a bit dirty) was to edit the build config file and correct the name for my Fedora install. Let's begin.
Clone the Armory repository
git clone 
Enter the BitcoinArmory dir
cd BitcoinArmory 
Switch to release code
git checkout 'v0.96.4' 
Verify commit signature
git tag -v 'v0.96.4' 
you should see the following message:
> object fee1f91a3137ef1056e15cc606a186b0e508f84c > type commit > tag v0.96.4 > tagger goatpig  1522530739 +0200 > > v0.96.4 > gpg: Signature made Sat 31 Mar 2018 11:12:19 PM CEST > gpg: using RSA key 8C5211764922589A > gpg: Good signature from "goatpig (Offline signing key for Armory releases) " > gpg: WARNING: This key is not certified with a trusted signature! > gpg: There is no indication that the signature belongs to the owner. > Primary key fingerprint: 745D 707F BA53 968B DF63 AA8D 8C52 1176 4922 589A 
if it looks the same, everything is ok.
Edit the file 'Makefile' file with
gedit Makefile 
And click the three dot menu > Find and Replace...
Configure the options as follows:
Click Replace All and close.
Go back to the terminal and run the following commands in order from inside the BitcoinArmory dir. Wait for the previous one to finish before running the next one:
if everything finishes without error you are all done! Run this to start Armory:
python ./ 
you are all set. Please let me know if I missed something.
edit: cd git dir.
submitted by AmbitiousSpeed0 to Bitcoin [link] [comments]

Syncing your Bitconnect QT wallet NEW updated 10/27/2018 How to Make a Bitcoin Wallet and buy Bitcoin! STEP 1 Altcoin CryptoCoin Windows Build Compile Environment Guide Getting a Bitcoin Address from a Web Wallet How to Sync your Bitconnect QT wallet NEW updated

For those of you looking to import your Vanity address, hacked key or paper wallet into your Bitcoin QT client, here are the instructions:. Backup Your Wallet.. Although this process is well tested and used you should always take another backup of your wallet.dat file before starting. I built it on Windows 7 64 bit using the mingw tools from those instructions just fine after editing the paths ... but might as well use the latest version since it works right?) Hint: untar using the tar binary which is included in MinGW (do not use 7-zip, it will not handle symlinks correctly) using cd \c\ && tar xvvf\c\Users\Matt\Downloads\openssl-1.0.0d.tar.gz && mv openssl-1.0.0d openssl ... In Bitcoin-Qt, only the first wallet will be displayed and accessible for creating and signing transactions. GUI selectable multiple wallets will be supported in a future version. However, even in 0.15 other loaded wallets will remain synchronized to the node’s current tip in the background. Bitcoin Core (formerly Bitcoin-Qt) is the third Bitcoin client, developed by Wladimir van der Laan based on the original reference code by Satoshi Nakamoto. It has been bundled with bitcoind since version 0.5. Bitcoin-Qt has been rebranded to Bitcoin Core since version 0.9.0 .. Bitcoin Core can be used as a desktop client for regular payments or as a server utility for merchants and other ... The following instructions describe installing Bitcoin Core using tools available in most mainstream Linux distributions. We ... is not included in the .dmg file you may have downloaded to install Bitcoin-QT. Bitcoind, along with its support binaries, is instead included in the OS X .tar.gz file listed on the official Bitcoin Core download page. To download this file using Terminal, execute ...

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Syncing your Bitconnect QT wallet NEW updated 10/27/2018

Download your QT wallet here Get your Node List here!ne... this video explain how you build the compile environment on windows to create altcoin ~ cryptocoin Windows QT `s Compile Depencies ~ complete deps folder included to download . Depencies : https ... This short video shows how to compile the bitcoin source code on linux (ubunu). an easy task to do but it take some time (around 15 min) please read the instruction in the official github https ... A Bitcoin address is needed to accept Bitcoin. A wallet is a collection of addresses. Th... Bitconnect Coin Community member teaches users how to set up and sync a new BCC wallet. Welcome back Crypto Friends, it’s been quite some time since I made a video. I want to talk about a couple ...