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 Start Bitcoin Mining with Maximum Efficiency Xpubs

Start Bitcoin Mining with Maximum Efficiency Xpubs

Tortuga: The lightweight, non-custodial, self-hosted payment gateway you've been waiting for!

I'm very pleased to announce the availability of my payment-gateway project: Tortuga.
Tortuga lets you sell a digital file for cryptocurrency. All you need to be able to do is run a docker container (I run mine on a little VPS from digital ocean).
Benefits:
Current Limitations:
Supported cryptocurrencies:
You can read more about it at https://github.com/unyieldinggrace/tortuga
The deployment instructions on the github page should be sufficient for technical users. I'll try to make time to write a step-by-step setup tutorial on read.cash at some stage (or if someone else wants to do it, that might be a good way to score tips!).
Motivation:
I made this payment gateway for idealistic reasons. I wrote a book called Taxation is Slavery: The Biblical Case for Libertarian Politics. Among many other things, this book argues that fiat money-printing is a form of immoral counterfeiting, and that we should attempt to secede from the fiat power structures by using cryptocurrency. To live that out, I was determined to find a way to sell the book directly to readers, completely peer-to-peer. In this way, I'm helping to "close the loop". I'm giving people something good to spend their (crypto) money on, without either them or me ever having to convert it to fiat.
The book also includes a brief sub-chapter on how the very existence of Bitcoin should force many Christians to re-evaluate the way they understand Jesus' statement about "giving to Ceasar what is Caesar's". Bitcoin has no president or king's face on it. There is no engraving of any Caesar. Thinking this through might be of interest to many Bitcoin fans :)
Ready to see it in action?
You can test out the payment gateway by seeing how I use it on my own site. Just click one of the crypto checkout buttons at https://beingbiblical.com/books/taxation-is-slavery
submitted by fatalglory to btc [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]

lost bitcoin?

Had a friend sent $60 to a bitcoin address of mine on blockchain to my wallet, I had someone send before he sent and his money sent to my old address, I then imported that address with the $60 and typed in my Xpub Key and nothing, it says private key incorrect but I'm the owner of the wallet and the only one that'd have that "private key" where do I find it?
submitted by BullyGang to Bitcoin [link] [comments]

(Upvote to the top) > SOLUTION FOR ZCLASSIC Eleos Wallet: "Wallet daemon can not be run. Check if daemon does not already run"

So I noticed a lot of people recently (including myself) are experiencing the error "Wallet daemon can not be run. Check if daemon does not already run" when trying to open up their ZCL Eleos wallet, and people are unable to access their funds or cannot export their private keys as well. A solution to this is now official (thanks to JBrutWhat from the BTCP team for helping me out on this.) Note: Post is being edited as more info becomes available to me.
This solution also works for users who are on the ZClassic Swing wallet experiencing the error "A general unexpected critical error has occurred: error: Couldn't connect to server, see the console output for more detailed error information!."
Eleos Wallet Troubleshooting section
ZClassic Electrum Wallet
  1. Create a new standard wallet and restore the 2FA wallet using your "seed" codes. DO NOT password protect this wallet.
  2. Disable the 2FA feature when presented with the option.
  3. Navigate to C:/Users/YOUR-NAME/AppData/Roaming/Electrum-zcl/wallets. Open the new standard wallet file with Notepad.
  4. You will need to gather the 2 private keys and one public key. To find this easily, press “CTRL+F” and search for “xprv”. Copy the 2 “xprv” values as well as the last “xpub” value. You will need these in a later step.
  5. Create a new “Multi-signature wallet”. Select “From 3 co-signers” on the first slider. Select “Require 2 signatures” on the second slider.
  6. To add the first co-signer, click “Use public or private keys”. Enter the first xprv key in this box.
  7. Add the second co-signer via a private key also.
  8. Add the third co-signer with the public key. Complete the set-up.
  9. Your wallet funds now have the ability to be sent from the multi-signature wallet.
For Users who were already using the Electrum wallet beforehand, you can go to file > new/restore wallet > next > import zclassic private keys and input the private key you obtained from the walletaid tool, and it should import the wallet into the electrum wallet. Then from there, go to file > backup wallet and export a copy of the wallet.dat file onto an offline USB.
Reminder: Backup and delete the private keys file from your desktop pc/hard drive, move it into an offline USB for safekeeping. Do not leave it on an online device.
Donate to me if you found the guide useful! Your donations 100% voluntary but they are greatly appreciated and keep us going!
ZCL: t1fkxCWJs3f2oXznGwZuEgftJ2SCjYZ8VjZ
BTC: 14Xmfm9jf4h1h4RXZBQCFK6i4LWibqWVPu
LTC: LhAERgWcjbbXQbGqjhy4owALGhwfpj1aw2
ETH: 0xe723305337926e1fcb5dd0495e6648569a252c13
BCH: 1JXqLHqjYH8bew38AXwEt9dmKvsdYwLtvr
LINKS
(You can join the discord rooms where there are channels for users looking for help)
submitted by BestServerNA to ZClassic [link] [comments]

Musings on the future of XMR

My thoughts and observations on XMR:
I have been following cryptocurrencies since 2010; however I did not have the requisite computer literacy at the time to effectively understand and use them. Several years ago, I bought a small amount of Bitcoin, but did not truly pusue it. Recently, I resolved to become sufficiently computer savvy. After months of self-study, I decided to test my skills with a desktop home build, to feed my gaming addiction. A friend of mine suggested I should mine Monero while the rig was idle. I had only heard of Monero as 1 of 1000 altcoins. I was intrigued by XMR's CPU minability, something I thought no longer existed in the cryptosphere. I've been mining ever since. (My rig sports an i7-6700K CPU and dual GTX 1070's.) I started mining in December of last year. I'm a hobbyist miner, nothing more, but I can say that mining has had a psychological effect on me. I follow the story of Monero with an excitement that my Bitcoin purchase never brought me. Perhaps this is because mining is an ongoing process instead of a single accumulation event. Here is a summary of what drew me to Monero, what it has already accomplished, where I think it needs to go, and what I think some of its most special features are. As a zealous convert from Bitcoin, I can't help but think of BTC as a foil for XMR.
First and foremost, I was drawn to Monero due to it's ability to be feasibly mined on both CPUs and GPUs. I like the idea of being able to put idled pieces of technology to work; old phones and computers could be utilized to mine. ASICs are expensive, closely tied to the price of the coin they mine, and provide no other utility to my life. CPUs and GPUs are a less risky investment, because they have utility and value independent of crypto mining. When I joined the Monero revolution, hardware wallets were not available yet; this means there was also an opportunity to use truly ancient tech as an air gapped wallet, allowing me to even utilize machines that were uneconomic to mine with. I have always been a sort of scrap-oriented hacker, and I take pride in mining on computers and phones that I have assembled, upgraded, or refurbished myself. This is an experience that cannot be replicated by plugging in an ASIC; one of the biggest things that drew me to Monero was the dev team's commitment to mining on consumer technology. My faith in the project was affirmed by the recent PoW change.
The second major factor that drew me to Monero related to the (in my opinion) greater utility of the address format and mnemonic seed, as compared to Bitcoin. I've always felt that BTC's mnemonic seeds and HD wallets were sort of grafted on to the underlying protocol. As an example, not all HD wallet seeds are compatible; you need to be running a program (such as Electrum) that works with that seed. In Monero, the mnemonic seed was considered from the beginning, and integrated into the core client. We can carry our XMR seeds across platform without worry. If memory serves correctly, GUI seeds can be used in Monerujo and MyMonero. I've been told they work with Cakewallet as well. This a great convenience I think we often overlook.
I feel like my next point is somewhat related to the above point; we do not have to hassle with xpubs. Using xpubs means you need to give out a new address every transaction, or deal with the consequences of address reuse. Monero's automatic stealth address integration not only addresses some of these drawbacks, but it also offers the convenience of only having to copy a QR code once. Your XMR address never changes, so it's a lot more convenient to have something like a donation address or pre-printed QR codes, for example.
Another feature of XMR that I think sets it apart is it's tail emission; surprisingly few coins have it. Not only does a tail emission incentivizes mining indefinitely, it also replenishes the coin supply. Coins will inevitably be lost over time as people die or lose their seeds; in the long term this could result in volitility due to a lack of liquidity, which is detrimental to the whole crytpo ecosystem. I think Monero's conservative tail emission is forward thinking in that respect. Enough coins will be replaced to ensure ongoing mining as well as general liquidity.
Thus far, I haven't even mentioned the privacy aspects. Ring Signatures, Ring CT, and Stealth Addresses all work together to give Monero users a great degree of privacy. These are great features that would have drawn me to hold the coin, even if they didn't pique my interest to mine it.
There can still be improvements on this front, and in fact there have been and there will continue to be. Minimum Mixins have been increasing, improving plausible deniability. Subaddresses give Monero users the ability to utilize multiple receive addresses, gaining some of the advantages of BTC's xpubs. Bulletproofs are coming, increasing the efficiency of Monero's cryptography. Kovri is coming, not just for the official GUI wallet but hopefully also for mining pools as well.
There have been other recent innovations as well such as multi-signature transactions which allow Monero to take advantage of escrow abilities. The ecosystem around the blockchain has grown as well, notably in the realm of hardware wallets. The use of Monero will likely soar as a result of these new augmentations.
Here are some of the developments I have witnessed in my short time as a part of this community:
(1) Multi-signature Support
(2) Subaddress Generation
(3) Hardware Wallet Support
(4) Anti-ASIC PoW Change
(5) Mixin Size Increase
Here's what I am looking forward to as catalysts:
(1) Kovri integration
(2) Mobile hardware wallet support via Monerujo
(3) Monero as a Debian package integrated into Tails OS
(4) Bulletproof transaction size reduction
Continuing PoW forks to combat ASICs
(5) XMR adoption as base currency on Bisq
These factors are what galvanize my belief that Monero will only increase in utility over time. XMR has lost over half it's value since I started mining, and I can't but help to see it as an opportunity. XMR is only getting steadily better than Bitcoin; parity may be closer than we think.
There is only one major roadblock to adoption, in my mind, and I believe it is an inevitable consequence of our encrypted blockchain. Frankly, making a view-only wallet is a cumbersome pain. The private view key only lets you see incoming transactions, so you need to import the signed key images from another machine. This is a much more painstaking process than simply exporting a Bitcoin xpub. Thankfully, hardware wallets can be a solution to this problem, as a means of providing access to private keys and key images. Technical difficulties are quickly melting away, priming to release Monero's revolutionary potential. Monero is my dream coin, embodying what I feel are all the central tenants of the original cypherpunk cryptocurrency movement.
What else are you looking forward to in the future of Monero? Does anyone else share my sense of giddyness for the future?
submitted by spirtdica to Monero [link] [comments]

🚀launch🚀 of developer.ravencoin.online

Intro

Today i am happy to announce the release of ravencoin.online's new developer platform Developer.ravencoin.online. Featuring the powerful RVNBOX-SDK, REST, GUI for deploying and scaling and a Market for monetizing your work.
committed to helping change the world with Ravencoin by providing a best in class suite of tools for developers to SUPERCHARGE their RVN workflow.

RVNBOX

ravencoin.online’s developer platform is based on the popular RVNBOX javascript framework. Offering utility methods for Mnemonics, HDNodes, ECPairs, Crypto, Address conversion, Transactions and much more.
Learn More...

REST

The RVN JSON RPC over HTTP including a fully documented and interactive GUI which developers can use to test their ideas and confirm their code is making proper API calls.
Learn More...

GUI

BIP44 development wallet. Convert between address Types. Create QR codes for WIF, XPub and XPrivs. Sign and verify messages.
Learn More...

Mastering Ravencoin

Based on Mastering Bitcoin by Andreas M. Antonopoulos, Mastering Ravencoin is the ultimate master level course. Covering topics ranging from "What is Ravencoin?", "How Ravencoin Works", "Keys, Addresses, Wallets", "Transactions", "The Blockchain", "Mining and Consensus" and much more Mastering Ravencoin will take your knowledge from hobbyist to professional step-by-step.
Learn More...

Tutorials

Step by step instructions to build Ravencoin apps from scratch. See real world examples get built and have your own working copies to bootstrap your project from.
Learn More...

Open Source

Spot an error? Want to add something? Developer.ravencoin.online is 100% open source under the MIT Open Source License. Clone the developer.ravencoin.online repo and create a pull request. all tools can be found on our github organization raven-community

Summary

The Ravencoin developer community is growing quickly. Daily new apps launch which push the boundaries of what is possible with blockchain technology. We're committed to continuing to release cutting-edge open source tooling to help developers go from idea to application. Watch this space for blog posts, video streams and more.
submitted by MSFTserver to Ravencoin [link] [comments]

Decred Journal – September 2018

Note: you can read this on GitHub (link), Medium (link) or old Reddit (link).

Development

Final version 1.3.0 of the core software was released bringing all the enhancements reported last month to the rest of the community. The groundwork for SPV (simplified payment verification) is complete, another reduction of fees is being deployed, and performance stepped up once again with a 50% reduction in startup time, 20% increased sync speed and more than 3x faster peer delivery of block headers (a key update for SPV). Decrediton's integrations of SPV and Politeia are open for testing by experienced users. Read the full release notes and get the downloads on GitHub. As always, don't forget to verify signatures.
dcrd: completed several steps towards multipeer downloads, improved introduction to the software in the main README, continued porting cleanups and refactoring from upstream btcd.
Currently in review are initial release of smart fee estimator and a change to UTXO set semantics. The latter is a large and important change that provides simpler handling, and resolves various issues with the previous approach. A lot of testing and careful review is needed so help is welcome.
Educational series for new Decred developers by @matheusd added two episodes: 02 Simnet Setup shows how to automate simnet management with tmux and 03 Miner Reward Invalidation explains block validity rules.
Finally, a pull request template with a list of checks was added to help guide the contributors to dcrd.
dcrwallet: bugfixes and RPC improvements to support desktop and mobile wallets.
Developers are welcome to comment on this idea to derive stakepool keys from the HD wallet seed. This would eliminate the need to backup and restore redeem scripts, thus greatly improving wallet UX. (missed in July issue)
Decrediton: bugfixes, refactoring to make the sync process more robust, new loading animations, design polishing.
Politeia: multiple improvements to the CLI client (security conscious users with more funds at risk might prefer CLI) and security hardening. A feature to deprecate or timeout proposals was identified as necessary for initial release and the work started. A privacy enhancement to not leak metadata of ticket holders was merged.
Android: update from @collins: "Second test release for dcrandroid is out. Major bugs have been fixed since last test. Latest code from SPV sync has been integrated. Once again, bug reports are welcome and issues can be opened on GitHub". Ask in #dev room for the APK to join testing.
A new security page was added that allows one to validate addresses and to sign/verify messages, similar to Decrediton's Security Center. Work on translations is beginning.
Overall the app is quite stable and accepting more testers. Next milestone is getting the test app on the app store.
iOS: the app started accepting testers last week. @macsleven: "the test version of Decred Wallet for iOS is available, we have a link for installing the app but the builds currently require your UDID. Contact either @macsleven or @raedah with your UDID if you would like to help test.".
Nearest goal is to make the app crash free.
Both mobile apps received new design themes.
dcrdata: v3.0 was released for mainnet! Highlights: charts, "merged debits" view, agendas page, Insight API support, side chain tracking, Go 1.11 support with module builds, numerous backend improvements. Full release notes here. This release featured 9 contributors and development lead @chappjc noted: "This collaboration with @raedahgroup on our own block explorer and web API for @decredproject has been super productive.".
Up next is supporting dynamic page widths site wide and deploying new visual blocks home page.
Trezor: proof of concept implementation for Trezor Model T firmware is in the works (previous work was for Model One).
Ticket splitting: updated to use Go modules and added simnet support, several fixes.
docs: beginner's guide overhaul, multiple fixes and cleanups.
decred.org: added 3rd party wallets, removed inactive PoW pools and removed web wallet.
@Richard-Red is building a curated list of Decred-related GitHub repositories.
Welcome to new people contributing for the first time: @klebe, @s_ben, @victorguedes, and PrimeDominus!
Dev activity stats for September: 219 active PRs, 197 commits, 28.7k added and 18.8k deleted lines spread across 6 repositories. Contributions came from 4-10 developers per repository. (chart)

Network

Hashrate: started and ended the month around 75 PH/s, hitting a low of 60.5 and a new high of 110 PH/s. BeePool is again the leader with their share varying between 23-54%, followed by F2Pool 13-30%, Coinmine 4-6% and Luxor 3-5%. As in previous months, there were multiple spikes of unidentified hashrate.
Staking: 30-day average ticket price is 98 DCR (+2.4). The price varied between 95.7 and 101.9 DCR. Locked DCR amount was 3.86-3.96 million DCR, or 45.7-46.5% of the supply.
Nodes: there are 201 public listening nodes and 325 normal nodes per dcred.eu. Version distribution: 5% are v1.4.0(pre) dev builds (+3%), 30% on v1.3.0 (+25%), 42% on v1.2.0 (-20%), 15% on v1.1.2 (-7%), 6% on v1.1.0. More than 76% of nodes run v1.2.0 and higher and therefore support client filters. Data as of Oct 1.

ASICs

Obelisk posted two updates on their mailing list. 70% of Batch 1 units are shipped, an extensive user guide is available, Obelisk Scanner application was released that allows one to automatically update firmware. First firmware update was released and bumped SC1 hashrate by 10-20%, added new pools and fixed multiple bugs. Next update will focus on DCR1. It is worth a special mention that the firmware source code is now open! Let us hope more manufacturers will follow this example.
A few details about Whatsminer surfaced this month. The manufacturer is MicroBT, also known as Bitwei and commonly misspelled as Bitewei. Pangolinminer is a reseller, and the model name is Whatsminer D1.
Bitmain has finally entered Decred ASIC space with their Antminer DR3. Hash rate is 7.8 TH/s while pulling 1410 W, at the price of $673. These specs mean it has the best GH/W and GH/USD of currently sold miners until the Whatsminer or others come out, although its GH/USD of 11.6 already competes with Whatsminer's 10.5. Discussed on Reddit and bitcointalk, unboxing video here.

Integrations

Meet our 17th voting service provider: decredvoting.com. It is operated by @david, has 2% fee and supports ticket splitting. Reddit thread is here.
For a historical note, the first VSP to support ticket splitting was decredbrasil.com:
@matheusd started tests on testnet several months ago. I contacted him so we could integrate with the pool in June this year. We set up the machine in July and bought the first split ticket on mainnet, using the decredbrasil pool, on July 19. It was voted on July 30. After this first vote on mainnet, we opened the tests to selected users (with more technical background) on the pool. In August we opened the tests to everyone, and would call people who want to join to the #ticket_splitting channel, or to our own Slack (in Portuguese, so mostly Brazilian users). We have 28 split tickets already voted, and 16 are live. So little more than 40 split tickets total were bought on decredbrasil pool. (@girino in #pos-voting)
KuCoin exchange listed DCBTC and DCETH pairs. To celebrate their anniversary they had a 99% trading fees discount on DCR pairs for 2 weeks.
Three more wallets integrated Decred in September:
ChangeNow announced Decred addition to their Android app that allows accountless swaps between 150+ assets.
Coinbase launched informational asset pages for top 50 coins by market cap, including Decred. First the pages started showing in the Coinbase app for a small group of testers, and later the web price dashboard went live.

Adoption

The birth of a Brazilian girl was registered on the Decred blockchain using OriginalMy, a blockchain proof of authenticity services provider. Read the full story in Portuguese and in English.

Marketing

Advertising report for September is ready. Next month the graphics for all the ads will be changing.
Marketing might seem quiet right now, but a ton is actually going on behind the scenes to put the right foundation in place for the future. Discovery data are being analyzed to generate a positioning strategy, as well as a messaging hierarchy that can guide how to talk about Decred. This will all be agreed upon via consensus of the community in the work channels, and materials will be distributed.
Next, work is being done to identify the right PR partner to help with media relations, media training, and coordination at events. While all of this is coming up to speed, we believe the website needs a refresher reflecting the soon to be agreed upon messaging, plus a more intuitive architecture to make it easier to navigate. (@Dustorf)

Events

Attended:
Upcoming:
We'll begin shortly reviewing conferences and events planned for the first half of 2019. Highlights are sure to include The North American Bitcoin Conference in Miami (Jan 16-18) and Consensus in NYC (May 14-16). If you have suggestions of events or conferences Decred should attend, please share them in #event_planning. In 2019, we would like to expand our presence in Europe, Asia, and South America, and we're looking for community members to help identify and staff those events. (@Dustorf)

Media

August issue of Decred Journal was translated to Russian. Many thanks to @DZ!
Rency cryptocurrency ratings published a report on Decred and incorporated a lot of feedback from the community on Reddit.
September issue of Chinese CCID ratings was published (snapshot), Decred is still at the bottom.
Videos:
Featured articles:
Articles:

Community Discussions

Community stats:
Comm systems news: Several work channels were migrated to Matrix, #writers_room is finally bridged.
Highlights:
Twitter: why decentralized governance and funding are necessary for network survival and the power of controlling the narrative; learning about governance more broadly by watching its evolution in cryptocurrency space, importance of community consensus and communications infrastructure.
Reddit: yet another strong pitch by @solar; question about buyer protections; dcrtime internals; a proposal to sponsor hoodies in the University of Cape Town; Lightning Network support for altcoins.
Chats: skills to operate a stakepool; voting details: 2 of 3 votes can approve a block, what votes really approve are regular tx, etc; scriptless script atomic swaps using Schnorr adaptor signatures; dev dashboard, choosing work, people do best when working on what interests them most; opportunities for governments and enterprise for anchoring legal data to blockchain; terminology: DAO vs DAE; human-friendly payments, sharing xpub vs payment protocols; funding btcsuite development; Politeia vote types: approval vote, sentiment vote and a defund vote, also linking proposals and financial statements; algo trading and programming languages (yes, on #trading!); alternative implementation, C/C++/Go/Rust; HFTs, algo trading, fake volume and slippage; offline wallets, usb/write-only media/optical scanners vs auditing traffic between dcrd and dcrwallet; Proof of Activity did not inspire Decred but spurred Decred to get moving, Wikipedia page hurdles; how stakeholders could veto blocks; how many votes are needed to approve a proposal; why Decrediton uses Electron; CVE-2018-17144 and over-dependence on single Bitcoin implementation, btcsuite, fuzz testing; tracking proposal progress after voting and funding; why the wallet does not store the seed at all; power connectors, electricity, wiring and fire safety; reasonable spendings from project fund; ways to measure sync progress better than block height; using Politeia without email address; concurrency in Go, locks vs channels.
#support is not often mentioned, but it must be noted that every day on this channel people get high quality support. (@bee: To my surprise, even those poor souls running Windows 10. My greatest respect to the support team!)

Markets

In September DCR was trading in the range of USD 34-45 / BTC 0.0054-0.0063. On Sep 6, DCR revisited the bottom of USD 34 / BTC 0.0054 when BTC quickly dropped from USD 7,300 to 6,400. On Sep 14, a small price rise coincided with both the start of KuCoin trading and hashrate spike to 104 PH/s. Looking at coinmarketcap charts, the trading volume is a bit lower than in July and August.
As of Oct 4, Decred is #18 by the number of daily transactions with 3,200 tx, and #9 by the USD value of daily issuance with $230k. (source: onchainfx)
Interesting observation by @ImacallyouJawdy: while we sit at 2018 price lows the amount locked in tickets is testing 2018 high.

Relevant External

ASIC for Lyra2REv2 was spotted on the web. Vertcoin team is preparing a new PoW algorithm. This would be the 3rd fork after two previous forks to change the algorithm in 2014 and 2015.
A report titled The Positive Externalities of Bitcoin Mining discusses the benefits of PoW mining that are often overlooked by the critics of its energy use.
A Brief Study of Cryptonetwork Forks by Alex Evans of Placeholder studies the behavior of users, developers and miners after the fork, and makes the cases that it is hard for child chains to attract users and developers from their parent chains.
New research on private atomic swaps: the paper "Anonymous Atomic Swaps Using Homomorphic Hashing" attempts to break the public link between two transactions. (bitcointalk, decred)
On Sep 18 Poloniex announced delisting of 8 more assets. That day they took a 12-80% dive showing their dependence on this one exchange.
Circle introduced USDC markets on Poloniex: "USDC is a fully collateralized US dollar stablecoin using the ERC-20 standard that provides detailed financial and operational transparency, operates within the regulated framework of US money transmission laws, and is reinforced by established banking partners and auditors.".
Coinbase announced new asset listing process and is accepting submissions on their listing portal. (decred)
The New York State Office of the Attorney General posted a study of 13 exchanges that contains many insights.
A critical vulnerability was discovered and fixed in Bitcoin Core. Few days later a full disclosure was posted revealing the severity of the bug. In a bitcointalk thread btcd was called 'amateur' despite not being vulnerable, and some Core developers voiced their concerns about multiple implementations. The Bitcoin Unlimited developer who found the bug shared his perspective in a blog post. Decred's vision so far is that more full node implementations is a strength, just like for any Internet protocol.

About This Issue

This is the 6th issue of Decred Journal. It is mirrored on GitHub, Medium and Reddit. Past issues are available here.
Most information from third parties is relayed directly from source after a minimal sanity check. The authors of Decred Journal have no ability to verify all claims. Please beware of scams and do your own research.
Feedback is appreciated: please comment on Reddit, GitHub or #writers_room on Matrix or Slack.
Contributions are also welcome: some areas are adding content, pre-release review or translations to other languages.
Credits (Slack names, alphabetical order): bee, Dustorf, jz, Haon, oregonisaac, raedah and Richard-Red.
submitted by jet_user to decred [link] [comments]

Questions about bitcoin wallets, and mining for bitcoins

Bitcoin wallets are only accessible by one device right? So for example, if I create a bitcoin wallet on my computer, it isn't accessible from my phone or my tablet even if I download the same bitcoin wallet app, correct?
So if I want to use a different computer to mine for bitcoins, I just create a bitcoin wallet for that device and then have the mined bitcoins sent to my other computer that I mainly use?
submitted by p_121 to BitcoinBeginners [link] [comments]

Groestlcoin Release September 2018

Introduction

As always, the past 3 months since 22nd June have been crazy busy. The bears might still be around, but the show must go on and of course has not slowed the Groestlcoin development team in the slightest. Here’s a quick overview of what has already happened since the last release: - Integrated into the bitbns exchange, with the ability to buy Groestlcoin directly with the Indian Rupee. - Groestlcoin Rebrand Vote – Whilst there was much talk and push for a rebrand vote, the overall result was almost unanimously in favour of keeping our unique and conversation-starting name. With just 83 votes to Rebrand, and 2577 votes to No Rebrand. Thank you for all who voted, the funds raised are being used to fund ongoing hosting and development costs. - Integrated into the Cryptobridge exchange. Cryptobridge is a popular decentralised exchange where you always hold the private keys to your funds, only YOU have access to them. - Groestlcoin has been added to SimpleSwap – Groestlcoin can now be swapped with over 100 other cryptocurrencies, without signing up! - Groestlcoin has been added to UnoDax, one of the leading cryptocurrency exchanges in India, with TUSD, BTC and INR trading pairs. - Groestlcoin has been added to SwapLab.cc, where you can buy Groestlcoin using Bitcoin and over 50 other altcoins. Purchasing with VISA/Mastercard is coming VERY SOON. Discussed later: - Groestlcoin has been listed on #3 largest exchange in the world on volume, Huobi Global! More on this to come further on in the announcements. - Groestlcoin has been added to the Guarda Multi-Currency Wallet. - Groestlcoin has been added to Melis Multi-Device, Multi-Account, Multi-Platform, Multi-Signature advanced wallet! Already this list is far more than most other cryptocurrencies have achieved in the past 3 months. But this is just the tip of the iceberg of what has been developed.

What's been Happening?

GRSPay Released

We are so excited for this, that it has it's own separate reddit thread. Head over there now at https://www.reddit.com/groestlcoin/comments/9ikr5m/groestlcoin_releases_grspay/? to see more on this!
https://www.melis.io/assets/logo-navbar-4b6f0d372f15b2446d3fa4c68f346e4fb08ee113941186cee58fd6135f3f8b7d.svg

Melis Wallet

The the most advanced wallet for Bitcoin, Bitcoin Cash, Litecoin and now Groestlcoin.
With Melis you have the complete control of your bitcoins and private keys, you can define spending limits policies and make use of two or more factors authentication. Melis is open source, published on GitHub.

How Melis Works?

You can create as many accounts as you want. An account is a part of your wallet that can be customised to your requirements. You can choose how many co-signers are required to spend funds. The accounts are completely independent and act like separate wallets from each other but can be accessed via the same details. A core feature of Melis is the ability to set a ‘primary’ device. With this you can set an account as ‘Secure’ so it is only viewable (and accessible at all) from the Primary device. You can have a savings account hidden from the outside world whilst also having your ‘spending’ funds available on the go. With Melis you can create a multi-signature account between N people, where up to N signatures are required to sign a transaction, choosing if any of those should be mandatory.
Core Features:
https://guarda.co/assets/images/1PGo4ID.svg?1537791124643

Guarda Wallet

Safer than ever! Desktop Light Wallet - Anonymous and fast!
With Guarda Multi-currency Desktop Light Wallet you don’t need to register. Guarda has no access to your private keys or funds. You can receive, send, store, buy and exchange cryptocurrencies in complete anonymity and safety. All these features are available on Linux, Windows or MacOS. Choose the one that suits you!
More info about Guarda wallet on www.guarda.co
https://holytransaction.com/images/logo.png

Integrated into HolyTransaction

What is HolyTransaction?

HolyTransaction gives users access to the crypto world with a universal cryptocurrency wallet and instant exchange.

Features

For more information, visit Holy Transaction here.
https://www.groestlcoin.org/wp-content/uploads/2018/09/next-grs-groestlcoin.jpg

Integrated into NEXT Wallet

What is NEXT?

NEXT is a modern, next-generation stylish open-source Desktop wallet.

Features

For more information, visit NextWallet here.
https://blockchainfinancial.com/mediaserve2018/09/admin-06143647-bcf_logo_vec_256x256.png

Integrated into Blockchain Financial

What is Blockchain Financial?

Blockchain Financial is a set of web based services for individuals and companies that want to make things happen with the Cryptocurrencies Ecosystem. - For those that don't know anything about cryptocurrencies, we offer tools that will let them receive, send and operate with an assortment of coins. - For those that are already riding the wave, we offer tools that will let them do all those things that they weren't able to do.

Blockchain Financials mission

We're not here to reinvent the wheel. We're here to make it run smoother for you, and we provide some of the most useful services you'll find on the internet, made in a way that is easy to understand and use on a daily basis. In short, we're a bunch of people that claim to be Crypto Evangelists. We strongly believe in cryptocurrencies, and our main promise is to push them up so more people get involved and take all the advantages they offer.

More information from Blockchain Financial

Back in 2014, the world was taken by storm when Facebook approved the first cryptocurrencies tipping apps. The first was for Dogecoin, and the second was for multiple coins.
The project was hosted on whitepuma.net, and persisted for almost two years, built up a massive user community and gave a home to Bitcoin, Litecoin, Dogecoin and dozens of other bitcoin-based altcoins.
After very active months, the tipping hype started to fade away. Then, the developers decided to jump into the next stage: bringing not only tipping, but also mining and a widget that could be embedded on websites to allow everyone to accept payments. Sadly, the work was never completed because the project started to require an unsustainable amount of resources. Then, in a painful decision, a shutdown was announced by December 2015.
A couple of months after whitepuma.net was closed, the source code was released by its creator as Open Source on GitHub. But it wasn't maintained.
Now, some of the original members of the dev and admin teams gathered up with a handful of the WhitePuma's elite users, and decided to make something good with the best pieces of the old source code. That, with fresh new ideas and the power of the BardCanvas engine, synthesized the core of Blockchain Financial.
More info about Blockchain Financial wallet on .
For more information, visit [Blockchain Financial](www.blockchainfinancial.com)
https://www.huobi.com/image/logo.aeb4723.svg

Groestlcoin Listed on Huobi

Who are Huobi?

Huobi was founded in China and is now based in Singapore, with offices in Hong Kong, South Korea, Japan and the North America, currently sitting #3 in volume on Coinmarketcap. Huobi is a great leap forward for our growing presence in Asia and we are very excited to be listed here!
You can find the official Huobi announcement here.

Groestlcoin Core v2.16.3 - Please Update ASAP

A new major Groestlcoin Core version 2.16.3 is now available for download which includes both a Denial of Service component and a critical inflation vulnerability, so it is recommended to upgrade to it if you are running a full Groestlcoin node or a local Groestlcoin Core wallet.
v2.16.3 is now the official release version of Groestlcoin Core. This is a new major version release with a very important security updates. It is recommended to upgrade to this version as soon as possible. Please stop running versions of Groestlcoin Core affected by CVE-2018-17144 ASAP: These are 2.13.3 and 2.16.0.
As a result in this, all exchanges and services have been asked to upgrade to this version, so please be patient if wallets go in to maintenance mode on these services.

What's new in version v2.16.3?

This is a major release of Groestlcoin Core fixing a Denial of Service component and a critical inflation vulnerability (https://nvd.nist.gov/vuln/detail/CVE-2018-17144) exploitable by miners that has been discovered in Groestlcoin Core version 2.13.3 and 2.16.0. It is recommended to upgrade to 2.16.3 as soon as possible. If you only occasionally run Groestlcoin Core, then it's not necessary to run out and upgrade it right this second. However, you should upgrade it before you next run it. If you know anyone who is running an older version, tell them to upgrade it ASAP. Stored funds are not at risk, and never were at risk. At this time we believe over half of the Groestlcoin hashrate has upgraded to patched nodes. We are unaware of any attempts to exploit this vulnerability. However, it still remains critical that affected users upgrade and apply the latest patches to ensure no possibility of large reorganizations, mining of invalid blocks, or acceptance of invalid transactions occurs.

The Technicals

In Groestlcoin Core 2.13.3, an optimization was added (Bitcoin Core PR #9049) which avoided a costly check during initial pre-relay block validation that multiple inputs within a single transaction did not spend the same input twice which was added in 2012 (Bitcoin Core PR #443). While the UTXO-updating logic has sufficient knowledge to check that such a condition is not violated in 2.13.3 it only did so in a sanity check assertion and not with full error handling (it did, however, fully handle this case twice in prior to 2.1.0.6). Thus, in Groestlcoin Core 2.13.3, any attempts to double-spend a transaction output within a single transaction inside of a block will result in an assertion failure and a crash, as was originally reported. In Groestlcoin Core 2.16.0, as a part of a larger redesign to simplify unspent transaction output tracking and correct a resource exhaustion attack the assertion was changed subtly. Instead of asserting that the output being marked spent was previously unspent, it only asserts that it exists. Thus, in Groestlcoin Core 2.16.0, any attempts to double-spend a transaction output within a single transaction inside of a block where the output being spent was created in the same block, the same assertion failure will occur. However, if the output being double-spent was created in a previous block, an entry will still remain in the CCoin map with the DIRTY flag set and having been marked as spent, resulting in no such assertion. This could allow a miner to inflate the supply of Groestlcoin as they would be then able to claim the value being spent twice.
Groestlcoin would like to publicly thank Reddit user u/Awemany for finding CVE-2018-17144 and reporting it (https://lists.linuxfoundation.org/pipermail/bitcoin-core-dev/2018-Septembe000064.html). You deserve gratitude and appreciation from cryptoworld, and you have ours. If you want to support him for his work, please consider donating to him on his bitcoin cash address: bitcoincash:qr5yuq3q40u7mxwqz6xvamkfj8tg45wyus7fhqzug5
http://i.imgur.com/3YhyNZK.png

Groestlcoin Electrum-GRS 3.2.2 - Ledger & Trezor Edition

What is Electrum-GRS?
Electrum-GRS is a lightweight "thin client" groestlcoin wallet Windows, MacOS and Linux based on a client-server protocol. Its main advantages over the original Groestlcoin client include support for multi-signature wallets and not requiring the download of the entire block chain.

Changes:

http://i.imgur.com/3YhyNZK.png

Electrum-GRS Mobile Android

What is Electrum-GRS Mobile?

Electrum-grs is a lightweight "thin client" groestlcoin wallet Android based on a client-server protocol. Its main advantages over the original Groestlcoin client include support for multi-signature wallets and not requiring the download of the entire block chain.

Changes

Groestlcoin EasyVanity Released

Groestlcoin EasyVanity is a Windows app is built from the ground-up in C# and makes it easier than ever before to create your very own bespoke Groestlcoin address(es), even whilst not connected to the internet! You can even generate multiple keys with the same prefix and leave it on overnight whilst your CPU or GPU collects and stores these addresses locally.
If you're tired of the random, cryptic addresses generated by regular groestlcoin clients, then Groestlcoin EasyVanity is the right choice for you to create a more personalized address.

Features

• Ability to continue finding keys after first one is found • Includes warning on startup if connected to the internet • Ability to output keys to a text file (And shows button to open that directory) • Ability to make your match case sensitive (Where possible) • Show and hide the private key with a simple toggle switch, and copy the private key straight to your clipboard • Show full output of commands • Includes statistics whilst the application is running • Ability to choose between Processor (CPU) and Graphics Card (GPU) • Automatically detects 32 or 64 bit systems • Features both a Light and Dark Material Design inspired Themes • EasyVanity's search is probabilistic, and the amount of time required to find a given pattern depends on how complex the pattern is, the speed of your computer, and whether you get lucky. • EasyVanity includes components to perform address searching on your CPU (vanitygen) and your OpenCL-compatible GPU (oclvanitygen). Both can be built from source, and both are included in the Windows binary package. • Prefixes are exact strings that must appear at the beginning of the address. When searching for prefixes, Easyvanity will ensure that the prefix is possible, and will provide a difficulty estimate. • The percentage displayed just shows how probable it is that a match would be found in the session so far. If it finds your address with 5% on the display, you are extremely lucky. If it finds your address with 92% on the display, you are unlucky. If you stop EasyVanity with 90% on the display, restart it, and it finds your address with 2% on the display, your first session was unlucky, but your second session was lucky. • EasyVanity uses the OpenSSL random number generator. This is the same RNG used by groestlcoin and a good number of HTTPS servers. It is regarded as well-scrutinized. Guessing the private key of an address found by EasyVanity will be no easier than guessing a private key created by groestlcoin itself. • To speed up address generation, EasyVanity uses the RNG to choose a private key, and literally increments the private key in a loop searching for a match. As long as the starting point is not disclosed, if a match is found, the private key will not be any easier to guess than if every private key tested were taken from the RNG. EasyVanity will also reload the private key from the RNG after 10,000,000 unsuccessful searches (100M for oclvanitygen), or when a match is found and multiple patterns are being searched for. • Free software - MIT. Anyone can audit the code. • Written in C# - The code is short, and easy to review.

Groestlcoin Sentinel (Android & Blackberry) – Mainnet + Testnet

What is Sentinel?

Groestlcoin Sentinel is the easiest and fastest way to track/receive/watch payments in your offline Groestlcoin Wallets. Groestlcoin Sentinel is compatible with any standard Groestlcoin address, BIP44 XPUB (Extended Public Key) BIP49 YPUB and BIP84 ZPUB
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 particular wallet.

What's New?

The P2SH paperwallet supports creating P2SH paperwallets in bulk, keypair generation with QR codes and sweeping tool. Groestlcoin believes strongly in privacy, the live version does not collect and store IP or transaction data.
Changes
Features
The BECH32 paperwallet supports creating BECH32 paperwallets in bulk, keypair generation with QR codes and sweeping tool. Groestlcoin believes strongly in privacy, the live version does not collect and store IP or transaction data.
Features
![WebWallet](https://i.imgur.com/Z2oj7bj.png)

Groestlcoin Web Wallet Update 1.4

What is Groestlcoin Web Wallet?
Groestlcoin Webwallet is an open source, multisignature, HD Wallet and more! Webwallet is a a open source browser based Groestlcoin webwallet.
Webwallet is a playground for Groestlcoin in javascript to experiment with. It supports multisig, OP_HODL, RBF and many more. Groestlcoin believes strongly in privacy, the live version does not collect and store IP or transaction data.
Changes:
submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

Hardware and Software Wallet Support Update

Hardware and Software Wallet Support Update
Cryptoworth's latest update provides support for cold-storage wallet synchronization for the popular Trezor and Ledger hardware wallets along with software wallet synchronization for Exodus, Trust Wallet, and Jaxx Liberty.
Currently, Bitcoin is the first supported cryptocurrency through our recently added hardware and software wallet support update. Using XPUB, we were able to add Bitcoin support through these wallets. We plan on pushing our next update by next week to provide full transaction recording support of Bitcoin wallets synchronized through our supported wallets. This would allow for accurate transaction recording and accounting, which would then be exportable using labeled PDF or CSV format just like how transaction exports work for exchange connections.
The roadmap after accurate transaction recording for Bitcoin through our supported wallets will include the integration of other commonly mined PoW cryptocurrencies. We plan to provide software and hardware wallet support for Litecoin, Dash, Bitcoin Cash, Ethereum, Monero, and even Dogecoin. We leverage XPUB, YPUB, and ZPUB to enable the connections and integrations mentioned above.
https://preview.redd.it/5itg51ydp3d31.png?width=1270&format=png&auto=webp&s=580dadfd1f8d67789371ef8a98df46a9d3f1e27b
submitted by cryptoworth to u/cryptoworth [link] [comments]

Notes on a first quick test of NTumblebit, on Linux and regtest.

I just thought I'd jot down a few notes on the experience of trying out the current NTumbleBit code.
This is testing on regtest, done for the simple reason that you don't have to wait for testnet blocks (nor sync testnet which is mildly annoying). At this stage I just wanted to learn how this works.
Your starting point is this wiki page.

Installation

You need to download Bitcoin Core. Use at least 0.13.1 - this turned out to be only major blocking point in the whole test, funnily enough, for me - it took me a few hours(!) in debugging to realize that the reason my wallet's coins were not being recognized was simply because 0.12.1 didn't support the necessary RPC syntax. (Note to devs: is there a way to expose errors/exception to the user in the client to help with under-the-hood errors like that? RPC configuration errors are exposed, so that's good of course).
Since this is regtest, that's it: you don't need to sync any blockchains :)
However, you do of course have to configure and start it. Put a bitcoin.conf somewhere (if you're currently running a node it's easiest to make a separate one from your main ~/.bitcoin/bitcoin.conf one, of course. I put one in ~/bitcoin.conf with these settings:
rpcuser=bitcoinrpc rpcpassword=123456abcdef 
(you'll need those values again in a minute) and then run with
~/bitcoininstallationdibitcoind -regtest -daemon -conf=homedibitcoin.conf 
(I didn't need to add server=1 to config).
Note that coins are not available until maturity, so you need to use the generate command to mine blocks, like this:
~/bitcoininstallationdibitcoin-cli -regtest -rpcuser=bitcoinrpc -rpcpassword=123456abcdef generate 101 
Now your regtest bitcoind is running, you can move on to Tumblebit. Follow the instructions in the wiki page mentioned at the start; install .Net Core - the Microsoft instructions are easy to follow, just a couple of apt-gets and install the *.deb. Next, clone the github repo and run the Unit Tests. They passed first time for me.

Running

Next, start up the server, following the instructions in the wiki, except note you're using regtest, so:
cd NTumbleBit.TumblerServer dotnet run -regtest 
The first start up will compile but also set up RSA keys, all that is fine without changes, but you'll need to edit the config so that the RPC is pointing at your regtest instance properly. In this case it (the new config should be located in ~/.ntumblebit/RegTest/server.config) should be edited to look like:
rpc.url=http://localhost:18332/ rpc.user=bitcoinrpc rpc.password=123456abcdef #rpc.cookiefile=yourbitcoinfolde.cookie 
Then restart and check you get no RPC errors. Leave that console open, it's running a server loop.
Next, configure and start the client. Note, we are still following the wiki page, except for the regtest element, so:
cd NTumbleBit.CLI dotnet run -regtest 
You'll most likely get an RPC error again, before it shuts down. Now we need to edit the ~/.ntumblebit/RegTest/client.config file. The server can be left as the default localhost:5000, but you need the right RPC settings:
rpc.url=http://localhost:18332/ rpc.user=bitcoinrpc rpc.password=123456abcdef #rpc.cookiefile=yourbitcoinfolde.cookie tumbler.server=http://localhost:5000 outputwallet.extpubkey= outputwallet.keypath=0 
the last two fields are the important bit, which the wiki page explains in some detail for the testnet case.

Details on setting up a receiving wallet (for this test!)

What you need is a BIP32 based wallet (HD) that supports testnet, and can be run against regtest here (which in most cases will be the same thing to a wallet, as long as it can connect via RPC to sync itself). The good news is the wallet doesn't need to contain any coins. The details of the following probably won't be suitable for most (if you've never used joinmarket it's a bit convoluted), so you'll probably want to find another easy to use wallet; the wiki page should be a good starting point.
For my test I used joinmarket; all we need to do is (a) hook it up to the regtest instance, and (b) extract the BIP32 xpub key that we'll be sending coins to. So in my case the flow of coins is:
Regtest Bitcoin Core wallet (containing 'mined' coins) one branch of my BIP32 joinmarket wallet, configured to sync against the same regtest instance.
I used my new joinmarket code but it's the same for the main joinmarket code. I overwrote joinmarket.cfg to have regtest settings (use this file; only the highlighted settings matter, those are the right ones for this test), then just run python wallet-tool.py randomseed. "randomseed" there can be literally anything, it's read as a brainwallet style seed for the bip32 wallet (because testnet, we don't care about its insecurity). The tpub.. keys seen for each branch are the "xpub" public keys at that branch of the BIP32 wallet. Tumblebit is going to send to a branch below whatever xpub we need, so the simplest is to add a print statement to print the xpub key above that; e.g. add this code:
for i in range(max_mix_depth): print('master for index: ' + str( i) + ' : ' + btc.bip32_privtopub(mixing_depth_keys[i])) 
immediately above this line. Then run again python wallet-tool.py randomseed.
Extract an xpub for any one of the "mixdepths", e.g. I chose:
master for index: 3 : tpubDBFGvUbWtEPKXeWPeG7rUh98iV9GuXSDbnk6ZrZHjcmp134BPByT293HPPQ93DktrVFKpZeAU1ULSdyfmwWuUGvUVLP19JkdUq2mzNKFJPR 
and put that tpub.. key into the field pubkey in the above mentioned 'client.config':
outputwallet.extpubkey=tpubDBFGvUbWtEPKXeWPeG7rUh98iV9GuXSDbnk6ZrZHjcmp134BPByT293HPPQ93DktrVFKpZeAU1ULSdyfmwWuUGvUVLP19JkdUq2mzNKFJPR outputwallet.keypath=0 
Now save and quit.

Running the tumble

Restart the client. If RPC is right, it'll start running, waiting for blocks. Your regtest Core instance will have coins (after the previous generate 101), and those coins will be automatically tumbled, one coin at a time, into the output wallet (in my case, the branch m/0/3/0 which is labelled there 'mixdepth 3, external').
Now you can test and watch the process! Open up a third console and repeatedly generate blocks:
/path/to/bitcoin/bin/bitcoin-cli -regtest -rpcpassword=123456abcdef generate 1 
As each block is generated you'll see the state in the client terminal window updating, showing the phases. A new 'epoch' (right term?) is started every N blocks (I haven't investigated the timing yet), and several epochs run concurrently. In each one, the client can pay in 1 Bitcoin (from Core) and eventually get out 1 coin - fees to the destination (Joinmarket in my case, any other BIP32 in yours). You can replace generate 1 with generate N but I'm not sure if the code will always correctly handle you mining lots of blocks at once! After a large enough number of blocks you'll start to see 'ClientCashout phase' occurring, and txids being printed out. You can go back to your (JM or other) wallet and see the coins arriving; here's what I see after a few epochs have gone through (using my python wallet-tool.py randomseed command):
for mixdepth=2 balance=0.00000000btc mixing depth 3 m/0/3/ external addresses m/0/3/0 tpubDDMAxSHJmxzeXwDnATuvtDizqNSsQKpXGufBDnER44BzEbHy7kg485zZwHqvzprgf6yEQYg9qYYfsLYS1HMmdSuXDzQb2dJSiga9geyM62R m/0/3/0/007 mw9s7tYucxB9yr2L6HkqeDVsh3wdgMdcyK used 0.99995750 btc m/0/3/0/008 mq5TgTNgwYHv88Q4T7wL6kTb1MBSPE3mqK used 0.99995750 btc m/0/3/0/009 mhzQFY8FNvux6SKWKLKmhBB3Sw4MLaSnyu used 0.99995750 btc m/0/3/0/010 mrYECmCf5UKa1BBRMuzprVugsCi9z7oiHo new 0.00000000 btc m/0/3/0/011 mopUNXmHT8ngfBymM3c3EYMg7RLZAf6Zc6 new 0.00000000 btc m/0/3/0/012 mmaVXVfQP4UAYJPhMpQ3FhgXfHzujaxyw4 new 0.00000000 btc m/0/3/0/013 mzYD1AcUFz8SVwJM8EjVCfEM6pcYnHooBR new 0.00000000 btc m/0/3/0/014 my5unLCEMWQBkXBdeJ75VVGk1wrMrT8iDE new 0.00000000 btc m/0/3/0/015 muA76YSTtKKmD6HnVKYhkd9K9TZnPLh8pp new 0.00000000 btc internal addresses m/0/3/1 for mixdepth=3 balance=2.99987250btc 
As you can see, 3 coins have arrived.
submitted by waxwing to TumbleBit [link] [comments]

Airbitz releases v2.1.0 with 'Smart Fees', xPub export, multiple languages, & much improved performance

This new version ushers in huge speed improvements, power efficiency, reliability, and the stability you expect from a financial application. This version includes:
We’re proud and excited to deliver this release to our users. Our team has worked hard and tirelessly to bridge the gap between complex bitcoin and blockchain technology and the familiarity of mobile banking. As always, our source code is open to the public and available on our Github repo at [github.com/Airbitz](github.com/Airbitz) Along with our full app update, the SDK, which we’ve built our app on, has been updated to v 0.11.0 which reflects all the new stability, performance, and reliability improvements as well as added functionality such as XPub export. Check it out at https://developer.airbitz.co
https://airbitz.co/go/airbitz-v2-1-0-ushers-speed-reliability-efficiency-new-features/
submitted by Paullinator to Bitcoin [link] [comments]

question about xpub

Hello, I am new here and I would like to understand something about my Trezor. When someone sends bitcoins to an address generated by my Trezor while my Trezor is not connected for a long time, how is that possible, how does it work?
I have an account with Genesis-mining and I have provided them with an address generated by my Trezor. Now, Genesis-mining made several payments on this address and I do not see them appearing in my Trezor. Should I provide the XPUB key to Genesis-mining?
Thank you for your help. kiko
submitted by kiko26fr to TREZOR [link] [comments]

An service POS that allows xpub ?

Hi, I have tryed before coinsofsale.com it was nice but now seems to be down, you could add your xpub from Electrum and start accepting bitcoin, with nice UI.
What other service I can recommend to a friend of mine which want to accept bitcoin in his store, but let it be known I want that he must be in control of coins.
submitted by Zyklon87 to Bitcoin [link] [comments]

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chart,.,bitcoin,.,year,.,bitcoin,.,yield,.,bitcoin,.,ytd,.,bitcoin,.,yubikey,.,bitcoin,.,yoda,.,bitcoin,.,yahoo finance chart,.,ybitcoin,.,magazine,.,bitcoin,.,y control de cambio,.,y combinator,.,bitcoin,.,ecuador y,.,bitcoin,.,bitcoin,.,by paypal,.,bitcoin,.,y el lavado de dinero,.,bitcoin,.,y deep web,.,bitcoin,.,y lavado de dinero,.,bitcoin,.,y litecoin,.,bitcoin,.,and blockchain,.,bitcoin,.,zebra,.,bitcoin,.,zerohedge,.,bitcoin,.,zimbabwe,.,bitcoin,.,zar,.,bitcoin,.,zcash,.,bitcoin,.,zapwallettxes,.,bitcoin,.,zarabianie,.,bitcoin,.,zug,.,bitcoin,.,zero,.,bitcoin,.,zero confirmations,.,bitcoin,.,z value,.,titan z,.,bitcoin,.,mining,.,titan z,.,bitcoin,.,z cash,.,bitcoin,.,nvidia titan z,.,bitcoin,.,mining,.,nvidia titan z,.,bitcoin,.,nakup zlata z,.,bitcoini,.,sklep z,.,bitcoinami,.,trgovanje z,.,bitcoini,.,co z,.,bitcoinem,.,bitcoin,.,0 confirmations,.,bitcoin,.,0.1,.,bitcoin,.,0.1.0,.,bitcoin,.,0 active connections,.,bitcoin,.,0 transaction fee,.,bitcoin,.,0 fee,.,0.15,.,bitcoins,.,0 25,.,bitcoins,.,0.05,.,bitcoin,.,in euro,.,bitcoin,.,2.0,.,0.1,.,bitcoins,.,0.21,.,bitcoins,.,bitcoin,.,1st august,.,bitcoin,.,1 million,.,bitcoin,.,101,.,bitcoin,.,10 year chart,.,bitcoin,.,10000,.,bitcoin,.,148,.,,.,bitcoin,.,10 year prediction,.,bitcoin,.,100k,.,bitcoin,.,100 dollars,.,bitcoin,.,10 years ago,.,1,.,bitcoin,.,in gbp,.,1,.,bitcoin,.,in pounds,.,1,.,bitcoin,.,in £,.,1,.,bitcoin,.,to dollar,.,1,.,bitcoin,.,in inr,.,1,.,bitcoin,.,to euro,.,1,.,bitcoin,.,in gdp,.,1,.,bitcoin,.,in eur,.,1,.,bitcoin,.,to myr,.,1,.,bitcoin,.,in sterling,.,bitcoin,.,2010,.,bitcoin,.,2017,.,bitcoin,.,2020,.,bitcoin,.,2018,.,bitcoin,.,2009,.,bitcoin,.,2013,.,bitcoin,.,21 million,.,bitcoin,.,2012,.,bitcoin,.,2014,.,2,.,bitcoin,.,to usd,.,2,.,bitcoin,.,price,.,2,.,bitcoin,.,to inr,.,2,.,bitcoin,.,wallets,.,2,.,bitcoins to dollars,.,2,.,bitcoins free,.,2,.,bitcoins a month,.,2,.,bitcoin,.,qt,.,bitcoin,.,2 year chart,.,bitcoin,.,2 paypal,.,bitcoin,.,3000,.,bitcoin,.,31st july,.,bitcoin,.,3 confirmations,.,bitcoin,.,3.0,.,bitcoin,.,3 year chart,.,bitcoin,.,3 month chart,.,bitcoin,.,300,.,bitcoin,.,365 club,.,bitcoin,.,3000 usd,.,bitcoin,.,30 confirmations,.,3,.,bitcoins in gbp,.,3,.,bitcoins,.,3,.,bitcoins to usd,.,3,.,bitcoin,.,in euro,.,3,.,bitcoin,.,to eur,.,bitcoin,.,3 unlimited,.,bitcoin,.,3 day chart,.,bitcoin,.,3 address,.,bitcoin,.,4000,.,bitcoin,.,4chan,.,bitcoin,.,4 billion,.,bitcoin,.,401k,.,bitcoin,.,4 backpage,.,bitcoin,.,43,.,bitcoin,.,40000,.,bitcoin,.,4k,.,bitcoin,.,4 year chart,.,bitcoin,.,48,.,4,.,bitcoins,.,4,.,bitcoins to usd,.,4,.,bitcoins in gbp,.,4,.,bitcoin,.,to eur,.,bitcoins 4 backpage,.,bitcoin,.,4 igaming,.,bitcoin,.,4 u,.,bitcoin,.,4 november,.,bitcoin,.,4 cash,.,bitcoin,.,5 year chart,.,bitcoin,.,51 attack,.,bitcoin,.,500,.,bitcoin,.,5 year,.,bitcoin,.,500 000,.,bitcoin,.,5000,.,bitcoin,.,50000,.,bitcoin,.,5 year price,.,bitcoin,.,5 years ago,.,bitcoin,.,5 year forecast,.,5,.,bitcoins in pounds,.,5,.,bitcoins,.,5,.,bitcoins to usd,.,5,.,bitcoin,.,free,.,5,.,bitcoin,.,in euro,.,bitcoin,.,5 years,.,bitcoin,.,5 minutes,.,bitcoin,.,5 min,.,bitcoin,.,5 unlimited generator,.,bitcoin,.,666,.,bitcoin,.,6 months,.,bitcoin,.,6 confirmations,.,bitcoin,.,6 month chart,.,bitcoin,.,6000,.,bitcoin,.,60 minutes,.,bitcoin,.,6 confirmations time,.,bitcoin,.,6 month price,.,bitcoin,.,6 years ago,.,bitcoin,.,60 day chart,.,6,.,bitcoin,.,network confirmations,.,,.,
submitted by besterse to BestCryptoPlatform [link] [comments]

Easy Generate Bitcoin xpub keys with Balance - YouTube This week in Bitcoin- 9-4-2020- Price plunge, 1400 BTC ... Best Bitcoin Mining Site  Without Investment  Payment ... Building Bitcoin Websites - YouTube Xpub Bitcoin Receiving Addresses with SmartBit API

The world's easiest Bitcoin Mining as a Service. Hash Power Marketplace. Xpubs gives you the best opprtunity to rent massive hash power for a short period of time. You don't rent from Xpubs directly, but you rent from other people connected to Xpubs. Bitcoin 1.00 PH/s. SHA256 for 24 hours. starting at. This application is not a bitcoin trading platform, much less a bitcoin mining calculator, we are an app that deliver news every day related to cryptocurrencies and the world of bitcoins. ... Just enter either a standard Bitcoin Cash address or an “extended public key” (aka an “xpub”) from your Bitcoin Cash wallet to start accepting ... Bitcoin Core is programmed to decide which block chain contains valid transactions. The users of Bitcoin Core only accept transactions for that block chain, making it the Bitcoin block chain that everyone else wants to use. For the latest developments related to Bitcoin Core, be sure to visit the project’s official website. Transcript - USB - Bitcoin Mining Setup Guide. What’s going on every one? This is Fred and today we’re going to build a Bitcoin miner. All right. So, if you’re unfamiliar with Bitcoin I do have another video that has all the 10 things that you need to know about Bitcoin. So, give that a watch, get caught up, come back and we’ll get started. Ubuntu Bitcoin Mining App Pieter Wuille suggested that the PR’s author, Jonas Schnelli, remove xpub support from scantxoutset for now and Wuille would later PR an update to scantxoutset that adds support was bedeutet cross trade for the output script descriptors described later in these meeting litecoin xpub notes.

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Easy Generate Bitcoin xpub keys with Balance - YouTube

How To Generate Your Own Private Keys for Cryptocurrencies (Bitcoin, Ethereum, Litecoin, etc) - Duration: 10:20. Vin Armani 6,279 views http://gestyy.com/ewNNnu This video is unavailable. Watch Queue Queue. Watch Queue Queue I'm going to talking about top free best bitcoin mining website, and I'm gonna tell you every steps to get bitcoin mining! In this video I'm showing how to m... Asheville, NC- September has started with a wild Bitcoin week! A strong hand had 1400 Bitcoin stolen from him, the fiat price of BTC plunged, Defi madness co...

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