XPUB from a ledger bitcoin segwit wallet : ledgerwallet

How do you monitor your portfolio?

I have a few different wallet accounts on my Trezor for BTC, and since I have generated so many addresses it's pretty unrealistic for me to monitor using a single bitcoin address (also it's not good for privacy).
I've currently found Spot for my phone which in my opinion has the best UI for a wallet that allows you to monitor your portfolio, but the problem is how long it takes to update prices in the app.
I was wondering if anybody else has suggestions that look nice, don't take forever to update, and also have multiple cryptocurrencies available. Obviously the bitcoin portion of it must be able to use XPUB to sync my addresses.
I'd love to use Exodus since they have the nicest UI imo, but they don't have Trezor support on the mobile app and also you can't sync multiple wallet accounts.
I'd love to hear what you guys use to track your crypto!
I'm looking forward to the desktop application as well :)
submitted by EZREPS to TREZOR [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]

Bull Bitcoin’s Dollar-Cost Averaging tool for Canadians: a detailed overview

Hello fellow Canadian Bitcoiners!
I'm Francis Pouliot, CEO and founder of Bull Bitcoin (previously known as Bitcoin Outlet) and Bylls.
I haven't been active on Reddit for a while but I thought I'd pop back here to let the community know about our new dollar-cost averaging feature, "Recurring Buy"
This post is a copy of my most recent medium article which you can read here if you want to see the screenshots. https://medium.com/bull-bitcoin/bull-bitcoins-dollar-cost-averaging-tool-for-canadians-the-right-time-to-buy-bitcoin-is-every-day-82a992ca22c1
Thanks in advance for any feedback and suggestions!
[Post starts here]
The Bull Bitcoin team is constantly trying to reduce the frictions ordinary people face when investing in Bitcoin and propose innovative features which ensure our users follow Bitcoin best practices and minimize their risks.
We are particularly excited and proud about our latest feature: an automated Bitcoin dollar-cost averaging tool which we dubbed “Recurring Buy”.
The Recurring Buy feature lets Bull Bitcoin users create an automated schedule that will buy Bitcoin every day using the funds in their account balance and send the Bitcoin directly to their Bitcoin wallet straight away.
We put a lot of thought in the implementation details and striking the right trade-offs for a simple and elegant solution. Our hope is that it will become a standard other Bitcoin exchanges will emulate for the benefit of their users. This standard will certainly evolve over time as we accumulate feedback and operational experience.
In this article, I cover:
The problem that we are trying to solve
Recurring Buy feature details, processes and instructions
The rationale (and tradeoffs) behind the main feature design choices
Bull Bitcoin is only available to Canadians, but non-Canadians that wish to have a look at how it works are welcome to make a Bull Bitcoin account and check out how it works here. You will be able to go through the process of create the schedule for testing purposes, but you wont be able to fund your account and actually purchase Bitcoin.
What problems does Dollar-Cost Averaging solve?
The most common concern of Bitcoin investors is, not surprisingly, “when is the right time to buy Bitcoin?”. Bitcoin is indeed a very volatile asset. A quick glance at a Bitcoin price chart shows there are without a doubt “worse times” and “better times” to invest in Bitcoin. But is that the same as the “right” time?
Gurus, analysts and journalists continuously offer their theories explaining what affects the Bitcoin price, supported by fancy trading charts and geopolitical analysis, further reinforcing the false notion that it is possible to predict the price of Bitcoin.
Newbies are constantly bombarded with mainstream media headlines of spectacular gains and devastating losses. For some, this grows into an irresistible temptation to get rich quick. Others become crippled with the fear of becoming “the sucker” on which early adopters dump their bags.
Veterans are haunted by past Bitcoin purchases which were quickly followed by a crash in the price. “I should have waited to buy the dip…”
Many Bitcoin veterans and long-term investors often shrug off the question of when is the right time to buy with the philosophy: “just hodl”. But even those holding until their death will recognize that buying more Bitcoin for the same price is a better outcome.
Given the very high daily volatility of Bitcoin, a hodler can find himself in many years having significantly less wealth just because he once bought Bitcoin on a Monday instead of a Wednesday. His options are either to leave it up to chance or make an attempt to “time the market” and “buy the dip”, which can turn into a stressful trading obsession, irrational decisions (which have a negative impact on budget, income and expenses) and severe psychological trauma. In addition, trying to “buy the dip” is often synonymous to keeping large amounts of fiat on an exchange to be ready for “when the time comes”.
There must be a better way.
Bitcoin investors should be rewarded for having understood Bitcoin’s long-term value proposition early on, for having taken the risk to invest accordingly and for having followed best practices. Not for being lucky.
Overview of features and rules
In this section I go into every detail of the Recurring Buy feature. In the following section, I focus on explaining why we chose this particular user experience.
The user first decides his target investment amount. Ideally, this is a monthly budget or yearly budget he allocates to investing in Bitcoin based on his projected income and expenses.
The user then chooses either the duration of the Recurring Buy schedule or the daily purchase amount. The longer the better.
The frequency is each day and cannot be modified.
The user must submit a Bitcoin address before activating a Recurring Buy schedule. By default, every transaction will be sent to that Bitcoin address. It’s the fallback address in case they don’t provide multiple addresses later.
Once the user has filled the form with target amount, the duration and the Bitcoin address, he can activate the Recurring Buy Schedule.
The user is not required to already have funds in his account balance to activate the schedule.
We will randomly select a time of day at which his transaction will be processed (every hour, so 24 possible times). If the user insists on another time of day, he can cancel his Recurring Buy schedule and try again.


The Recurring Buy feature as displayed on bullbitcoin.com/recurring-buys
The schedule is then displayed to the user, showing the time and date at which transactions that will take place in the future. The user will be able to see how long his current balance will last.
He can follow the progress of the dollar-cost averaging schedule, monitor in real time his average acquisition cost, and audit each transaction individually.
At this point, the user can and should change the Bitcoin address of his next transactions to avoid address re-use. Address re-use is not forbidden, but it is highly discouraged.
After having modified the Bitcoin addresses, there is nothing left for the user to do except watch the bitcoins appear in his Bitcoin wallet every day!
The Bitcoins are sent right away at the time of purchase.
Bitcoin transactions using the Recurring Buy feature will have the lowest possible Bitcoin network transaction fee to avoid creating upwards pressure on the fee market impact other network users.


What users see after first activating a schedule
The Recurring Buy schedule will be cancelled automatically at the time of the next purchase if the balance is insufficient. He can add more funds to his balance whenever he wants.
The Recurring Buy schedule will continue until the target amount is reached or until the account balance runs out.
The user can cancel his Recurring Buy schedule whenever he wants.
If the user wants to change the amount or duration of the schedule, he can simply cancel his current schedule and create a new one.
Each schedule has a unique identifier so that users can keep track of various schedules they perform over time.
Once a schedule is completed, either fully or partially, a summary will be provided which shows the number of transactions completed, the average acquisition cost, the total amount of Bitcoin purchase and the total amount of fiat spent. Useful for accounting!


A partially completed Recurring Buy schedule cancelled after 9 days due to insufficient funds
Though process in making our design choices
Recurring Bitcoin Purchases vs. Recurring Payment/Funding
The first and most important design choice was to separate the processes of funding the account balance with fiat (the payment) from the process of buying Bitcoin (the purchase). Users do not need to make a bank transaction every time they do a Bitcoin purchase. They first fund their account manually on their own terms, and the recurring purchases are debited from their pre-funded account balance.
Another approach would have been to automatically withdraw fiat from the user’s bank account (e.g. a direct debit or subscription billing) for each transaction (like our friends at Amber) or to instruct the user to set-up recurring payments to Bull Bitcoin from their bank account (like our friends at Bittr). The downside of these strategies is that they require numerous bank transactions which increases transaction fees and the likelihood of triggering fraud and compliance flags at the user’s bank. However, this does remove the user’s need to keep larger amounts of fiat on the exchange and reduces the friction of having to make manual bank payments.
Bull Bitcoin is currently working on a separate “Recurring Funding” feature that will automatically debit fiat from the user’s bank accounts using a separate recurring schedule with a minimum frequency of once a week, with a target of once every two weeks or once a month to match the user’s income frequency. This can, and will, be used in combination from the “Recurring Buy” feature, but both can be used separately.
The ultimate experience that we wish to achieve is that users will automatically set aside, each paycheck (two weeks), a small budget to invest in Bitcoin using the “Recurring Funding” feature which is sufficient to refill their account balance for the next two weeks of daily recurring purchases.
Frequency of transactions
The second important decision was about customizing the frequency of the schedule. We decided to make it “each day” only. This is specifically to ensure users have a large enough sample size and remain consistent which are the two key components to a successful dollar-cost averaging strategy.
A higher amount of recurring transactions (larger sample size) will result in the user’s average acquisition being closer to the actual average Bitcoin price over that period of time. Weekly or monthly recurring purchases can provide the same effectiveness if they are performed over a duration of time which is 7x longer (weekly) or 30x longer (monthly).
It is our belief that the longer the duration of the schedule, the more likely the user is to cancel the recurring buy schedule in order to “buy the dip”. Dollar-cost averaging is boring, and watching sats appear in the wallet every day is a good way to reduce the temptation of breaking the consistency.
We do not force this on users: they can still cancel the schedule if they want and go all-in. We consider it more of a gentle nudge in the right direction.
Frequency of withdrawals (one purchase = one bitcoin transaction)
This is one of the most interesting design choices because it is a trade-off between scalability (costs), privacy and custody. Ultimately, we decided that trust-minimization (no custody) and privacy were the most important at the expense of long-term scalability and costs.
Realistically, Bitcoin network fees are currently low and we expect them to remain low for the near future, although they will certainly increase massively over the long-term. One of the ways we mitigated this problem was to select the smallest possible transaction fee for transactions done in the context of Recurring Buy, separate from regular transaction fees on regular Bitcoin purchases (which, at Bull Bitcoin, are very generous).
Note: users must merge their UTXOs periodically to avoid being stuck with a large amount of small UTXOs in the future when fees become more expensive. This is what makes me most uncomfortable about our solution. I hope to also solve this problem, but it is ultimately something Bitcoin wallets need to address as well. Perhaps an automated tool in Bitcoin wallets which merges UTXOs periodically when the fees are low? Food for thought.
When transaction fees and scalability becomes a problem for us, it will have become a problem for all other small payments on the Bitcoin network, and we will use whatever solution is most appropriate at that time.
It is possible that Lightning Network ends up being the scalability solution, although currently it is logistically very difficult to perform automated payouts to users using Lightning, particularly recurring payouts, which require users to create Bolt11 invoices and to convince other peers in the network to open channels and fund channels with them for inbound capacity.
These are the general trade-offs:
Send a Bitcoin transaction for every purchase (what we do) - Most expensive for the exchange - Most expensive for the user (many UTXOs) - Increases Bitcoin Network UTXOs set - Inefficient usage of block space - Most private - Zero custody risk
Keep custody of the Bitcoin until the schedule is over or when the user requests a withdrawal (what Coinbase does) - No additional costs -No blockchain bloating - Same level of privacy - High custody risk
Batch user transactions together at fixed intervals (e.g. every day) - Slightly lower transaction costs for the exchange - Same costs for the user - Slightly more efficient use of block space - Same level of UTXO set bloating - Much lower level of privacy - Slightly higher custody risk
Single address vs multiple addresses vs HD keys (xpubs)
The final decision we had to make was preventing address re-use and allowing users to provide an HD key (xpub) rather than a Bitcoin address.
Address re-use generally decreases privacy because it becomes possible for third-party blockchain snoops to figure out that multiple Bitcoin transactions are going to the same user. But we must also consider that even transactions are sent to multiple addresses, particularly if they are small amounts, it is highly likely that the user will “merge” the coins into a single transaction when spending from his wallet. It is always possible for users to prevent this using Coinjoin, in which there is a large privacy gain in not re-using addresses compared to using a single address.
It is important to note that this does not decrease privacy compared to regular Bitcoin purchases on Bull Bitcoin outside of “Recurring Buy”. Whether a user has one transaction of $1000 going to a Bitcoin address or 10x$100 going that same Bitcoin address doesn’t reveal any new information about the user other than the fact he is likely using a dollar-cost averaging mechanism. It is rather a missed opportunity to gain more privacy.
Another smaller decision was whether or not we should ask the user to provide all his addresses upfront before being able to activate the schedule, which would completely remove the possibility of address re-use. We ultimately decided that because this process can take a very long time (imagine doing Recurring Buy every day for 365 days) it is better to let the user do this at his own pace, particularly because he may eventually change his Bitcoin wallet and forget to change the addresses in the schedule.
There are also various legitimate use-cases where users have no choice but to re-use the same address . A discussion for another day!
Asking the user to provide an XPUB is a great solution to address re-use. The exchange must dynamically derive a new Bitcoin address for the user at each transaction, which is not really a technical challenge. As far as I can tell, Bittr is the only Bitcoin exchange exchange which has implemented this technique. Kudos!
It is however important that the user doesn’t reuse this XPUB for anything else, otherwise the exchange can track his entire wallet balance and transaction history.
It is worth noting that not all wallets support HD keys or have HD keys by default (e.g. Bitcoin Core). So it is imperative that we offer the option to give Bitcoin addresses. We believe there is a lot of potential to create wallet coordination mechanisms between senders and recipients which would make this process a lot more streamlined.
In the future, we will certainly allow users to submit an XPUB instead of having to manually input a different address. But for now, we wanted to reduce the complexity to a minimum.
Conclusion: personal thoughts
I have a somewhat unique perspective on Bitcoin users due to the fact that I worked at the Bitcoin Embassy for almost 4 years. During this time, I had the opportunity to discuss face-to-face with thousands of Bitcoin investors. One of my favourite anecdotes is a nocoiner showing up at our office in December 2013 with a bag full of cash attempting to buy Bitcoin, “I know how to read a chart”, furious after being turned away. Many people who went “all-in” for short-term gains (usually altcoins) would show up to the Bitcoin Embassy office months later with heart-breaking stories.
This isn’t what I signed up for. My goal is to help people opt-out of fiat and, ultimately, to destroy the fiat currency system entirely.
This instilled in me a deep-rooted concern for gambling addiction and strong aversion to “trading”. I do not believe that Bitcoin exchanges should blindly follow “what the market dictates”. More often than not, what dictates the market is bad habits users formed because of the other Bitcoin services they used in the past, what other people are used to, and what feels familiar. Running a Bitcoin company should be inseparable from educating users on the best practices, and embedding these best practices into the user experience is the best way for them to learn.
Another important anecdote which motivated me to build a dollar-cost averaging tool is a person very close to me that had made the decision to buy Bitcoin, but was so stressed out about when was the right time to buy that they ended up not buying Bitcoin for a whole 6 months after funding their Bull Bitcoin account. That person eventually gave up and ultimately invested a large amount all at once. In hindsight, it turned out to be one of the worst possible times to invest in Bitcoin during that year.
Investing in Bitcoin can, and should be, a positive and rewarding experience.
Buying Bitcoin every day is the right strategy, but it is not necessarily lead to the best outcome.
The reality is that the best time to buy Bitcoin is at when market hits rock bottom (obviously). Sometimes, the upside from buying the dip can be much bigger than the risk (e.g. when the price dropped below $200 in 2015). But these are exceptions rather than the rule. And the cost of chasing dips is very high: stress, investing time and mental energy, and the very real psychological trauma which results from making bad trading decisions. Ultimately, it’s better to do the right thing than being lucky, but it’s not always a bad idea to cheat on your dollar-cost averaging from time to time if you can live with the costs and consequences.
Yours truly,
Francis
submitted by FrancisPouliot to BitcoinCA [link] [comments]

BCH is now live on Blockonomics !

Service Link https://bch.blockonomics.co/
What is Blockonomics Blockonomics is an existing service for BTC running since 2014. This update provides a bunch services to the BCH ecosystem:
Feel free to get back to us with any suggestions/queries
submitted by blockonomics_co to btc [link] [comments]

Hi r/btc. We are launching Atlantis, the easiest way to start accepting BCH 0-conf payments from customers all over the world

When a merchant signs up on our service, he gets access to our API through a dashboard which provides a transaction history of all payments through our service. Some of the features of our service are-
1) Double spend detection - We verify 0-conf payments within 3-5 secs. We detect any double spend attempts and reject those payments. You get to access a bonus feature if you attempt to double spend. :D
2) Secure - We don't act as an intermediary between two parties. The merchant generates an Xpub and we generate new addresses for all payment requests. The merchant gets paid automatically and we have no way to seize/stop/censor any payments
3) Anonymous- Anyone can start accepting funds with a email login and generation of an API key.
4)Easy API- We have tried to develop an API that is very easy for developers to start accepting Bitcoin payments. With this service, developers can work on new ideas which we will let their creative minds come up with.
5)Flat Pricing- Payments no longer get a 2% fee per transaction but a flat monthly subscription fee. You pay at the end of the month and if you choose not to, you can terminate our service. Right now, this is the trial period and there is no fee at all :D
We request users/merchants/developers to sign up and test our service at atlantis. If you know any merchants who want to start accepting Bitcoin for online payments, please direct them to our service.
Our vision is to make global adoption of Bitcoin easier. Peter Thiel says the cost of switching is so high that the benefits should be 10x better. The world around is not going to learn about the disadvantages of paper money and come around to understanding the risk of a 0-conf in Bitcoin. We have to make it 10x easier for them to use Bitcoin. You can find more about our goals and a walkthrough of our product at Atlantis Blog
We would also appreciate any feedback you have for us. We have a few things that are in our immediate pipeline *Multiple Fiat support *Option of importing XPUB
submitted by redditdabbler to btc [link] [comments]

Founders of Trezor stole BTC from 1138 addresses | Breaking silence

Artist group from Czech republic which founded Paralelní Polis did a project focused on decentralization few years ago. After they stole flag of the president from the castle, they cut it into 1152 pieces and divided price of the flag into 1152 BTC addresses. Then they gave it away to random people on the streets. So person got piece of flag with description of the project with public and private key so they could withdraw their BTC. However they did security mistake in generating addresses. They used deterministic generating so you need just xpub - master public key and one of the private keys to find all other private keys. This xpub was shown on the conferences where people from SatoshiLabs - Trezor attended. Slush, founder of Trezor, was having conflict with of the main members of Ztohoven. Slush decided to exploit this vulnerability and steal BTC from all the addresses. 14 people already withdraw their coins so 1138 addresses were "robbed". His plan was send it to prime minister of Czech rep who is huge hater of Ztohoven group and embarrass them. Of course people noticed that Bitcoins are gone and after few days of investigation they accused Slush. They told him to send the money to charity which he did. They agreed to keep silence about this because of reputation in such security sensitive field like crypto. But there is so many people who trust their Trezor and people behind it. After 3 years, Ztohoven breaks the silence: https://www.ztohoven.com/?p=798
submitted by thaw2342 to Bitcoin [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]

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]

Mycelium announces Mycelium Gear

Mycelium proudly announces the release of its first online service, Mycelium Gear, based on the Straight Server developed by Roman Snitko, who has joined our team and is now leading this project.
Mycelium Gear is a merchant processor which demonstrates something that has never been possible before Bitcoin: the ability for merchants to use a full featured merchant processor to receive payments online, and have the money go straight into their own wallets, even if that wallet is running on their own phone in their pocket. Mycelium Gear does not hold any money on the merchant’s behalf, meaning there are no days of waiting for the money to arrive into your bank account, no risk of money being lost by the merchant processor, no need to fill out applications where you give out tons or personal information, and no complicated restrictive policies. All of this means that the costs of running this service are almost zero, which is also what it costs for you to use it: it’s absolutely free. It’s simplicity also means that it’s very easy to set up: you can have it up and running on your site within minutes.
Mycelium Gear relies on the unique benefits of BIP32 HD wallets, which use a single unique random number, called a seed, to generate a list of public bitcoin addresses (called an xpub key), and a corresponding list of private keys (xpriv key) for each of those addresses. When using Mycelium Gear, you give it only the xpub key that generates a unique bitcoin address for each customer invoice, while you keep the private xpriv key - the part that actually allows you to spend that money - only in your own wallet. Mycelium Gear also allows you to set your prices in other currencies, such as USD and EUR, and automatically adjust the amount of bitcoin for the invoice based on the bitcoin price at the time of purchase. When a purchase is made, Mycelium Gear presents the customer with an invoice with a bitcoin address to send their payment to. When the invoice is paid, Mycelium Gear monitors the public Bitcoin blockchain and notifies the merchant’s web store when a payment is detected. Since all bitcoin payment addresses are those of the merchant’s own private wallet, Mycelium Gear never needs to interact with any money directly.
Mycelium Gear is designed for both basic and advanced users. For basic users without a lot of programming experience, it provides an easy step-by-step walkthrough that creates a widget they can easily copy/paste into their website. For more advanced users, Mycelium Gear has a full API, including detailed documentation on how to implement it into your own shopping cart software.
Mycelium’s hope is that Gear will encourage even more merchants to adopt bitcoin and completely change the way merchant transactions are done, thus continuing our goal of decentralizing everything, improving privacy, and eliminating unnecessary third parties in the Bitcoin economy.
submitted by Rassah to Bitcoin [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]

Looking for a developer of Bitcoin POS terminal

A while ago we started on a development of a bitcoin POS terminal, however the development stalled because the developer went missing. I'm looking for someone to continue the work or start from scratch. I believe in open source and will be financing the development for the benefit of the crypto/Bitcoin ecosystem.
In light of open source and transparency, here is the full idea/plan for anyone to build. If this is something you would like to do, let's do it together.
This was made before the development stalled:
https://play.google.com/store/apps/details?id=at.bitpocket.pos
https://github.com/getbitpocket/bitpocket-mobile-app
This software was to be installed onto an android POS terminal bundled with a thermal printer, such as one of these:
https://www.aliexpress.com/item/PDA-POS-Handheld-device-Pos-terminal-built-in-thermal-bluetooth-printer-58mm-wifi-Android-Rugged-PDA/32905823954.html
https://www.aliexpress.com/item/Android-7-Mini-POS-Thermal-Printer-Barcode-Scanner-Handheld-POS-Terminal-Pos-PDA-Built-in-58mm/32922911878.html
The above mentioned Bitpocket app has almost all the required functionality except it needed to be ported onto the POS device and there were some minor bug fixes and functionality to be added.
This is how the POS terminal is supposed to work:
  1. idiot proof with the least amount of clicks required to operate. Right from the start the only thing the terminal operator (waiter, sales clerk) can do is input the price and click "request" or "reset"
  2. a QR code along with the basic info (price in fiat, price in BTC and bitcoin wallet address in text format) is displayed on screen
  3. when payment is received (zero confirmations is OK - considered successfully paid), a paid screen is displayed and that's the end of it. With the click of a OK button, the screen returns back to main page
The terminal has a pin protected settings area which only the business owner can access. There one can set the following:
- the wallet's XPUB / YPUB or ZPUB key (no private keys, ever). The terminal generates a fresh receiving address based on the XPUB/YPUB key for each transaction
- fiat currency selection
- setting to display the Bitcoin price in BTC (mBTC or bits)
- commission or discount setting (percentage to add or subtract from the total amount, rounded by two decimals - example: 3.75%)
- merchant name (text area where the operator owner can define the name of the business and optionally add a phone number, email, address, whatever. If they want just company name to be displayed on the receipt, they will add just that in this field)
- POS terminal ID (unit name)
- change pin code setting
- change XPUB/YPUB key
- reset all data
- setting for the template for the printed receipt paper. Probably a text-area which supports variables (sub setting: number of copies to print - ie, one for the customer, 2nd for the cash register)
Then there is the "account" area where the terminal operator can review history transactions
These are the changes to be made to the existing Bitpocket app (or equivalent new build):
  1. Port the app to the hardware POS terminal and make it work with the embedded printer
  2. A the moment it supports only XPUB. Add support for YPUB (and maybe ZPUB too). Move the XPUB/YPUB/ZPUB setting from the "account" are to the settings area
  3. Rename the "account" area to "Transactions" and make the sub-menu available to the POS operator without a PIN code. This is so that the shop clerk can review the transactions
  4. The transactions log should somehow be made available to the business owner, so that they can monitor the sales live. We need to come up with an easy way to allow the business owner remote access to the logs
  5. add POS terminal ID (unit name) to the settings area. This is in case a business is using multiple terminals, multiple stores, mulitple restaurants, etc. All of the units will show up in the same logs. POS ID is to be used to easily organize the logs
  6. template for the printed receipt page. Text area which supports variables, like for example: {text.merchant.name} Time: {text.time} Price: {text.fiat.amount} {text.fiat.currency} Crypto: {text.crypto.amount} {text.crypto.currency} Destination: {text.destination.address} Transaction ID: {text.transaction.id}. Templating/variables are necessary because things may change and different parts of the world have different regulation, etc.
  7. Lightning support would be great and will probably become necessary during the next bull run. For now we can do it without lightning to speed things up
Monetizing on this project:
I envision two ways of making money from this project while at the same time promoting adoption:
  1. Business owners who are incapable of doing it themselves outright buy the POS terminal bundled with the POS software and pay a premium price to a reseller who is capable of finding and putting together this open source project and the POS terminal off of alibaba / aliexpress) and then showing the business owner how it's done. In this case the business owner would own the private keys counterpart of the XPUB/YPUB/ZPUB and be able to do whatever he wants with the earned bitcoin.
  2. A company would act as a clearing house and help business owners who are otherwise not willing to hold Bitcoin. In this case the clearing house would own the POS terminals, the private keys to the wallets and all the bitcoin would go directly into the clearing house's wallet where it can be dealt with as the clearing house sees fit. The clearing house would owe/pay the business owner in fiat in agreed intervals. The clearing house would have sole access to the POS terminal's settings, while the business owner can see the sales history. Anyone brave enough can be a clearing house for his local community - take on a few small shops/bakeries or something bigger if you can afford it and have the cash liquidity. The commission setting in the POS terminal is for this purpose. Take on a few shops, stick Bitcoin accepted stickers on it and let's advance adoption.
Payment for this project development:
So I don't go through a similar experience as before where the project stalled after I sent a few devices and printers to the developer, I propose depositing the full agreed upon project cost to a reputable escrow service. The developer would buy his own POS terminal unit for testing - this unit will be refunded for at the completion of the project (money included in the total escrow sum). We can agree on the total cost privately.
submitted by besnadlesen to Jobs4Bitcoins [link] [comments]

PSA: If you can't get your hands on a hardware wallet in time to take your coins off exchanges by Aug. 1st, using Electrum for offline signing is a pretty decent alternative

Take a crappy old laptop if you can, or even a new very low-end one is good compared to the price gouging for hardware wallets on amazon. You can use a Chromebook if it runs x86 hardware, but if you're not very familiar w/ how to load Linux onto a Chromebook, a simpler bet is to go for a Windows laptop.
Once you get it, you can wipe it and load Linux for more paranoia if you'd like. Get it updated, etc., then disable Wifi in the BIOS settings.
Copy Electrum install files onto a USB drive on your live PC, and install this on the offline laptop. Create a standard wallet, take all the standard precautions of recording your seed phrase, etc. When your wallet is created, go to Wallet -> Master Public Keys, and copy the key you see beginning "xpub" to the USB drive and transfer take that file back to your live PC.
On the live PC, New/Restore, create a standard wallet, use private or public keys, and paste in your "xpub" key. You now have watch-only access to view your wallet on the live PC. For added privacy, install Tor browser on the live PC and run it, and under Tools -> Network, you'll see the option "Use Tor proxy at port 9150".
For added paranoia, compare the addresses you see on the live computer w/ the offline laptop just to make sure you haven't messed anything up. For even more paranoia, before you take the offline laptop offline, install Pyton and "pip install bitcoin", then once offline use pybitcointools to confirm that your private keys on the Electrum export screen actually correspond to the addresses you see. Not remotely necessary but a fair move for peace of mind that this is going to be ok.
The screens may look slightly different because this is written for an earlier version, but this explains some of the setup I described earlier, and how to spend using this setup: http://docs.electrum.org/en/latest/coldstorage.html
Basically you will create the unsigned transaction on the live computer, save it to a file on the USB drive, sign the tx on the offline laptop and save to the USB drive, then broadcast the signed tx on the live computer.
Like anything in the world, this setup is not completely without potential vulnerabilities, for example in principle it's possible for there to be malware embedded in the USB drive, or on the offline laptop that interferes with you seeing the correct addresses, or some such scenario, but all things considered this is a pretty good setup.
submitted by d4d5c4e5 to btc [link] [comments]

[Hiring] Write regexs to find addresses and keys for the 30 30 crypto currencies

Hello, I need regexs for addresses, keys and if they exist for that crypto currency, master private and public keys.
Examples:
Bitcoin address \b[13][a-km-zA-HJ-NP-Z0-9]{33}\b 1MKVGqyJA9YkVRuDsGCvnYVJ6ivNtfe289
Bitcoin XPUB key (master public key for HD wallets) \b(xpub)[a-km-zA-HJ-NP-Z1-9]{107,107}\b xpub661MyMwAqRbcF3n3Sg6dL7C29vTi8prxevmhoDLLR6VJTetHp3rKGDQFzNSvVBZ2oxkepHnu1TEWx1hiLjEvJ3rS3bRQQapr1BSyBzzz5JE Ethereum address \b0x?[0-9a-f]{40}\b 0x0dE0BCb0703ff8F1aEb8C892eDbE692683bD8030
The list should include at least 2 examples for each category so I can check it. It should be one example with the data to be found in the middle of a phrase and the other on a new line.
If you can do it, please tell me your price and time it would take.
submitted by Yvonfff to Jobs4Bitcoins [link] [comments]

[Help][Cryptorewards] Getting my Cryptocurrency setup complete

Have a look
Hey friends, I'm back again seeking some advice. No matter what I do to get the JSON displays correct, it goes sideways on me. So I'm back seeking some advice and offering up some crypto bounties for some more difficult functions, if even possible.
First, how do I round the digits on the percentages. I don't care THAT much how much the currency has varied in the past 24 hours, how can I reduce it to something like 2 digits, %.06 for instance? That's what I'm seeking just as general help.
Bounty: I wanna do is add a WG/JSON function that returns the price of my XPUB Bitcoin wallet in $USD. I found this API: https://blockchain.info/api/blockchain_api. The "Balance" part I am particulary interested in. No matter how many times I input my XPUP address, it would not return any values. I tried changing the JSON variables as well. Is KLWP capabable of monitoring a xpub address and then using some formula to convert into $USD? If so, I got a $10 bounty in your choice of Monero, Litecoin, or yes, even BTC (I'll pay a low sat/byte fee, but I will run it through every free accelerator I know and it won't get kicked out of the mempool but may take a day to get to your wallet). If Dogecoin is your thing, cool I can do that too. Ethereum? Sure. You're liking the rise of Ripple coin? Eh? Basically any coin listed on Changelly.com I can reward you. Just help me parse this data (If at all possible) to pull my balance from my xpub key and display in $USD.
Second $10 Bounty I am not sure is possible due to the nature of Monero, but is there a same function to display the balance of my Monero? It would need to utilize my private viewkey I am sure, so a formula that could do so would be fantastic, but I imagine is beyond KLWP capabliity.
Multiple crypto awards may be given at my discretion if someone improves on the original formula, but it is first come first serve in terms of claiming the rewards. Must wait 12 hours and PM valid payment address once I confirm.
Redditor for 8 years. Those that can parse this data will get paid.
submitted by fo0you to kustom [link] [comments]

Detailed post on how to claim BTX for BTC holders

Here is the exact procedure for BTC holders to claim your free Bitcore (https://bitcore.io/). I have posted it here as I can't find a clear explanation anywhere else.
Bitcore is a clone of Bitcoin at block 463604 (26 Apr 2017). It cloned every BTC wallet address with a balance bigger than 0.01 BTC. It did not clone your wallet, which is safe. It appears to have German devs.
If you had bitcoin in a wallet on 26 Apr 2017 then you are entitled to free Bitcores (BTX). The problem is that it did not get any publicity at the time, which means you have to try and work out what wallets you were using in April.
It is mainly traded on Cryptopia (https://www.cryptopia.co.nz/). Currently it is trading between $5-6 (https://www.coingecko.com/en/price_charts/bitcore/usd).
Example: if you had 10 bitcoin on 26 April, you can get 10 BTX free, currently worth about $55. If you had your bitcoin at an exchange on 26 April, then the exchange is entitled to claim the Bitcores, not you.
Your options are:
To redeem your Bitcores
  1. Download a Bitcore wallet to hold the Bitcores. Wallets for all major platforms are available at https://github.com/LIMXTEC/BitCore/releases
In the Bitcore wallet, generate a receiving address for the Bitcores
  1. Go to https://bitcore.cc/claim.php and enter a bitcoin address that contained bitcoin on 26 April. If Bitcore confirms that this address is eligible, proceed to the next stage.
NB THIS IS NOT YOUR SEED PHRASE, IT IS NOT YOUR 'XPUB', IT IS NOT YOUR PRIVATE KEY it is just the addresses.
How to find the addresses that contained bitcoin on 26 April varies from wallet to wallet, but basically make a pot of strong coffee and start at 26 April and WORKING BACKWARDS cut and paste into the Bitcore claim box every bitcoin address that RECEIVED bitcoins, right back to your first receipt.
When you have finished that, then cut and paste the CHANGE ADDRESS from every transaction that you SENT.
For example if you received 1 BTC then paste the receiving address. If you spent 2 BTC out of a 3 BTC input then paste the 1 BTC change address.
If the address is not eligible then i) it was created after 26 April ii) it contained no bitcoins on 26 April because they were spent in a subsequent transaction.
  1. If the address is eligible, sign a message 'BTX' with the eligible bitcoin address and copy the result
  2. Paste the signed message into the Bitcore site
  3. Paste the Bitcore receiving address (from your Bitcore wallet).
  4. You will receive the Bitcores almost immediately
  5. Either keep them, or sell them on Cryptopia.
Second airdrop
Perhaps because the first airdrop attracted so little attention, there will be another snapshot of the Bitcoin blockchain on 30 Oct 2017. Every address with min. 0.001 BTC will be funded with 40% Bitcore (BTX) of the total amount per bitcoin address. The Bitcores will be loaded directly to the public keys which are included in the snapshot. You can redeem these without a time limit. Yay! Do it all again!
Every Monday all wallets - except exchange wallets - which are loaded with at least 10 BTX receive 3% interest.
In addition on 30 Oct 2017 every Bitcore holder who has registered a BTX wallet address containing at least 10 BTX will get a one-time airdrop of 25%. You will have to register your BTX wallet address by sending a signed message to the BTX airdrop address (t.b.a.).
If anyone can improve on this tedious process please post. Please.
submitted by 1UazZNfbWi to btc [link] [comments]

[Question] Looking for a simple single checkout combo with both Bitcoin + Stripe.

Looking for a single checkout combo for Bitcoin + Stripe (credit card)
I want to sell my products to everyone, both Bitcoin and Credit card.
Requirements:
  1. Bitcoin payments are handled with xpub in HD manner, new addresses for each transaction. (priced in USD)
  2. Stripe payments pop up the stripe payment gizmos.
  3. Collect shipping information, gives a csv download.
  4. Basic SKU name+price management page
Not much fat:
  1. No "store" needed
  2. No conversion for Bitcoin to fiat needed (keep BTC in BTC for 100% of the sales)
Not required, bonus features:
  1. shipping calculation for a major provider
  2. paypal integration
  3. Inventory features
Already looked, but don't solve my problem:
Willing to pay $30/mo+1%
Edit: looks like I'm going to have to setup Shopify cart, then connect to Stripe, paypal and GoCoin.
Still looking for a better solution.
submitted by checkoutquestion to Bitcoin [link] [comments]

[Hiring] Write regexs to find addresses and keys for the 30 30 crypto currencies

Hello, I need regexs for addresses, keys and if they exist for that crypto currency, master private and public keys.
Examples:
Bitcoin address \b[13][a-km-zA-HJ-NP-Z0-9]{33}\b 1MKVGqyJA9YkVRuDsGCvnYVJ6ivNtfe289
Bitcoin XPUB key (master public key for HD wallets) \b(xpub)[a-km-zA-HJ-NP-Z1-9]{107,107}\b xpub661MyMwAqRbcF3n3Sg6dL7C29vTi8prxevmhoDLLR6VJTetHp3rKGDQFzNSvVBZ2oxkepHnu1TEWx1hiLjEvJ3rS3bRQQapr1BSyBzzz5JE Ethereum address \b0x?[0-9a-f]{40}\b 0x0dE0BCb0703ff8F1aEb8C892eDbE692683bD8030
The list should include at least 2 examples for each category so I can check it. It should be one example with the data to be found in the middle of a phrase and the other on a new line.
If you can do it, please tell me your price and time it would take.
submitted by Yvonfff to forhire [link] [comments]

BITCOIN PRICE PLUMMETS IN MINUTES!  WHAT IS NEXT FOR BTC? Historical Price of Bitcoin (2010 - 2019) Bitcoin Price in 2020 Building Bitcoin Websites - YouTube Bitcoin Rising With The Tide?! July 2020 Price Prediction & News Analysis

Note: your bitcoin and bitcoin cash address will change each time you request but your ether address will stay the same. Using Your Transaction Feed. Your home screen will display your most recent transactions, and you can find your full transaction feed by clicking on the corresponding asset in your wallet’s menu. Price. 1 Day. 1 Day. 7 Days. 30 Days. View All Prices. Mempool Size (Bytes) 1 Day. 1 Day. 7 Days. 30 Days. View All Charts. Latest Blocks. Height. Mined. Miner. Size. Height. 640006. Mined. 2 minutes. Miner. Buying crypto like Bitcoin and Ether is as easy as verifying your identity, adding a payment and clicking "Buy". Sign up for our Has anyone been able to extract an xpub code from their new bitcoin segwit address wallets? I tried ledger's API, but it seems to just get stuck. EDIT: OK, I finally figured it out. When your Ledger Bitcoin wallet window opens, click on 'my account', then a button on the top right appears that says 'account settings', that gives you an option 20 Minuten Soll ich jetzt Bitcoins kaufen?Bitcoin.cz fee bitcoin asic profitability calculator bitcoin bank transfer uk bitcoin price investing .. A Bitcoin hard fork is when the Bitcoin blockchain is split off, due to various .. LONDON (Alliance News) - The following London-listed .. BITCOIN 2017 HACKER. How to make sure sender paid the correct BTC amount with the constantly fluctuating BTC price? Start by searching your bitcoin address and clicking on Create P2P invoice [More Details] Your can check your complete wallet balance/history by searching your wallet xpub. You can also search multiple bitcoin addresses seperated by space

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BITCOIN PRICE PLUMMETS IN MINUTES! WHAT IS NEXT FOR BTC?

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