Mining with NVIDIA GeForce GTX 1060 6GB - BetterHash ...

Why Runelite's GPU renderer is one of the most important improvements to OSRS ever.

In a world of "gameplay versus graphics", a GPU renderer improves both

Not only does this new GPU renderer improve game responsiveness and framerate by a huge amount, but it's going to be so radically more efficient that it can afford to have longer draw distances. Not just this, but these distant map tiles will be clickable! Very exciting - every single task, skill, and activity will be smoother and more enjoyable.
Disclaimer: This language and information has been simplified for average gamers. Go away, sweaty "AKTHUALLY" brainlets.

OSRS currently uses a CPU renderer straight out of 2003

It's really REALLY bad! At least, by modern standards. It could not be more opposite to what modern computers pursue. It's not Jagex's fault, it's just old... Very VERY old! It's a huge undertaking, and Jagex has been too busy knocking mobile absolutely out of the park, and I'd do the same if I were them - so don't think this is some kind of rag on Jagex. Anyways, some may be surprised that this renderer is still managing to hurt computers today. How can software first written in 2003-2004 (FOR COMPUTERS OF THAT ERA) be laggy and stuttery on computers today? The answer is simple: resizable mode, and individual CPU core speed.
Resizable mode takes a game window that used to be 765x503 (the majority of which used to be a fixed GUI canvas, but not with the new mode!) and renders it at resolutions as high as 3840x2160, maybe even higher. Do you know how many pixels that is? Over 8 million. Do you know how many pixels the original renderer was designed to expect? Just under 390,000. That's over 21x the work being thrown at modern CPUs. Cores aren't anywhere near 21x faster than they were at the close of the single-core era, which is why players with 4k monitors need to see therapists after long play sessions.
Surely CPUs have gotten faster since the mid 2000s! They have, but not quite in the way that a single-threaded(single core) CPU renderer would expect... CPU manufacturers have been focusing on power draw, temperatures, core count, and special architectural improvements like GPU integration and controller integration. Comparatively, improving individual core speed hasn't been as much of a focus as it had been prior to the multi-core era -and no, I'm not talking about the useless gigahertz(TM) meme measurement, I'm talking about actual overall work done by the core. As a result, the CPUs we have today have developed down a much different path than what this CPU renderer would benefit from. Not nearly the amount that resizable mode demands. Especially considering these CPU cores were designed to assume that things didn't pile all their work onto just one core.
We're throwing over 21x the work at CPUs that, in most cases, have only been getting 5-15% faster per-core performance every year.

What is a "frame"?

Think of a frame as a painting. Your GPU renderer (or CPU cough cough) is responsible for using your GPU to paint an empty canvas, and turn it into a beautiful and complete picture. First, it draws the skybox(if there is one, it's gonna just fill with black in the case of OSRS). Then, it draws all the visible geometry from back to front, with all the lighting and effects. Then, it draws the GUI elements over the top. It does everything, one pixel at a time. Its job is to draw these paintings as quickly as possible (ideally, so you perceive movement) and present them to your monitor, one at a time, forever... until you close the game. Think of a GPU renderer as a talented artist with hundreds of arms (GPU cores).
If your GPU is able to paint this picture in 16.6 milliseconds (frame time measurements are always in milliseconds), then you'll have a frame rate of 60 frames per second, as 1000 ms / 16.6 is 60. Sometimes your renderer struggles, though. Sometimes it can only complete a frame in 100 milliseconds (10FPS). You can't wave a magic want when this happens. If you want a higher framerate, you need to either update your hardware, or change your software. By change software, I mean either make it more efficient at the work it's told to do, or give it less work. RuneLite has done the former. An example of the latter would be lowering resolution, turning graphical details down, turning off filtering, etc. Games usually call this set of controls the "Graphics settings". Luckily, OSRS is so lightweight it will likely never need a graphics settings menu.
(Think of a CPU renderer as a painter with no artistic ability and, in the case of quad core, four arms...but he's only allowed to paint with one, while the other 3 sit idle. Also, he has to constantly stop painting to return to his normal duties! No fun! The CPU is better off at its own desk, letting the GPU handle the painting.)

A GPU renderer improves frame rates

Not that this matters currently, as the game is capped at 50FPS anyways... but it's still going to be huge for low-end systems or high-end systems with high res monitors. There's also the future, though... Once a GPU renderer is out, it could be possible that they could someday uncap the framerate (which, according to mod atlas, is only the character's camera as all animations are 2FPS anyways).
I expect that an update like this will make fixed mode a solid 50FPS on literally everything capable of executing the game. Fixed mode was already easy to run on everything except for old netbooks and Windows Vista desktops, so this really wouldn't be a surprise.

A GPU renderer improves frame times

Frame times are just as important as frame rates. Your frame rate is how many frames are drawn over the course of a second. But, as described previously, each "painting" is done individually. Sometimes the painter takes longer to do something! What if there's a glowing projectile flying past the camera, or something else momentary that's intensive? The painter has to take the time to paint that, resulting in a handful of frames over the course of that second taking much more time than the others. When your frame rate is high and frame times are consistent, this is perceived as incredibly smooth motion.
Ideally, all of our frames are completed in the same amount of time, but this isn't the case. Sometimes "distractions" will come up, and cause the painter to devote an extra 10-20ms to it before returning to the rest of the painting. In bad scenarios, this actually becomes visible, and is referred to as micro stutter. Having a dedicated GPU renderer doing the work ensures this is very uncommon. A GPU has hundreds or thousands of cores. If some get distracted, others reach out and pick up the workload. Everything is smooth, distributed, and uninterrupted.
You may recall Mod Atlas talking about frame times when he posted about his GPU renderer last year: https://twitter.com/JagexAtlas/status/868131325114552321
Notice the part where he says it takes 25+ms on the CPU, but only takes 4-5ms on the GPU! That's 200-250 frames per second, if the framerate were uncapped! Also, side note: Just because a frame is completed in 1ms doesn't always mean your framerate will be 1000FPS. If your framerate is capped, then the painter will sit and wait after completing and presenting a frame until it's time to start painting again. This is why capping your framerate can be good for power usage, as demonstrated on mobile! Your GPU can't suck up your battery if it's asleep 90% of the time!

A GPU renderer is more efficient

Instead of piling all computational workloads and graphical workloads onto one single CPU core (rest in peace 8+ core users), a GPU renderer takes graphical work off the CPU and does it itself. I'd estimate the majority of all the work was graphical, so this will make a pretty noticeable difference in performance, especially on older systems. Before, having OSRS open while using other software would have a noticeable performance impact on everything. Especially on older computers. Not anymore! CPUs will run cooler, software will run better, and your computer may even use less power overall, since GPUs are much better at efficient graphical work than CPUs are!

All computers are already equipped to run this very VERY well

Most of the computers we have today are designed with two things: a good GPU, and an okay CPU. This isn't 2003 anymore. GPUs have made their way into everything, and they're prioritized over CPUs. They're not used just for games anymore, entire operating systems rely on them not just for animations and graphical effects, but entire computing tasks. GPUs are responsible for everything from facial recognition to Bitcoin mining these days. Not having a good one in your computer will leave you with a pretty frustrating experience - which is why every manufacturer makes sure you have one. Now, thanks to RuneLite, these will no longer be sitting idle while your poor CPU burns itself alive.

This new GPU renderer will make OSRS run much better on low end systems

Low end systems are notorious for having garbage like Intel Atom or Celeron in them. Their GPU is alright, but the CPU is absolutely terrible. Using the GPU will give them a boost from 5-15FPS in fixed mode, to around 50. At least, assuming they were made after the GPGPU revolution around 2010.

This new GPU renderer will make OSRS run much better on high end systems

High end systems tend to have huge GPUs and huge monitors. Right now, your GPU is asleep while your 4k monitor brings the current CPU renderer to its knees, on the verge of committing sudoku. Letting your GPU take on all that work will make your big and beautiful monitor handle OSRS without lag or stutter.

This new GPU renderer will open the possibility of plugins that build on top of it

One that comes to mind is a 2x/3x/4x GUI scaler. Scaling things in a graphics API is much easier than scaling it in some convoluded custom CPU renderer that was first designed to run in Internet Explorer 5.

It's easier to customize graphical variables in a GPU renderer than it is a glitchy old CPU renderer

Want night time? Change the light intensity. Want cel-shaded comic book appearance for some stupid reason? It's easy. Want to hit 60FPS on a Raspberry Pi? Change your render distance to 2 tiles. Now that the graphical work has been offloaded to a graphics API that's been literally designed to easily modify these things, the sky is the limit. See my past posts on this topic:
Big round of applause for the RuneLite team, and Jagex for allowing them to continue development. Without RuneLite, OSRS would be half the game it is today. Here's to their continued success, with or without Jagex integrating their code into the main game!
submitted by Tizaki to 2007scape [link] [comments]

r/Bitcoin recap - March 2019

Hi Bitcoiners!
I’m back with the 27th monthly Bitcoin news recap.
For those unfamiliar, each day I pick out the most popularelevant/interesting stories in Bitcoin and save them. At the end of the month I release them in one batch, to give you a quick (but not necessarily the best) overview of what happened in bitcoin over the past month.
A recap of Bitcoin in March 2019
Adoption
Development
Security
Mining
Business
Education
Regulation & Politics
Archeology (Financial Incumbents)
Fun & Other
submitted by SamWouters to Bitcoin [link] [comments]

TERA CRYPTO CURRENCY PROJECT

TERA is an open source and collaborative project. It means everyone can view and eventually modify its source code for hehis own needs. And it also means anyone is welcome to integrate its working community. The Tera community works to develop, deploy and maintain Tera nodes and decentralized applications that are part of the TERA Network.
The TERA technology serves the cryptocurrency concepts, trying to design a modern coins and contracts blockchain application : fast block generation, high transaction throughput and user-friendly application. It was officialy launched on 30th of June 2018 on the bitcointalk forum.
[Yuriy Ivanov](mailto:[email protected]) is the founder and core developer of the project. The Tera community is more familiar with the alias « vtools ».

USER FRIENDLY APPLICATION

In the aim to make this crypto currency project more friendly to end-users, some interesting innovations have been implemented in regards to the first generation of crpyto currency applications. The bitcoin and its thousands of child or fork, required a good level of IT skills in order to manage all the application chain from its own : from miners and its hardware, through stratum servers, proxies, to blockchain nodes. The Tera project intend to go one step further regarding crypto currency features integration into a single application : once installed, an efficient web application is available on localhost on port 8080. Then, any web browser supporting javascript may be able to access this application and to operate fully the Tera node.

MINING A CRYPTO CURRENCY

MINING CONCEPT

The mining activity consist in calling a mathematical procedure we can’t predict the result before we run it. But we intend to obtain a very specific result, which usually consist in a certain number of 0 as the first chars before any random answer. If we found the nonce (a random object) combined with the transaction data and the coin algorithm that produce such result, we’ll have solve a transaction block and we’ll get a reward for that. Thanks to this work, the transaction listed in the block will be added to the blockchain and anyone will be able to check our work. That’s the concept of ‘proof of work’ allowing anyone to replay the mathematical procedure with the nonce discovered by the node that solved the block and to confirm block inclusion into the blockchain.

POLITICAL AND ETHICAL CONSIDERATIONS

The Tera project is young. It will have to face the same problems is facing today the Bitcoin platform :
Any Crypto Currency Project with the goal its money and contracts to be used as any other historical money or service contract has to consider its political and ethical usage. Processes have to be imagined, designed and implemented in order to be able to fight against extortion, corruption and illegal activities threating crypto-currency development.

FAST BLOCK GENERATION AND HIGH THROUGHPUT

CLASSIC CRYPTO CURRENCY FEATURES

wallet, accounts, payments, mining, node settings and utilities, blockchain explorer and utilities…

DECENTRALIZED APP CATALOGUE

d-app : forum, stock exchange, payment plugins for third party platform, …

TECHNOLOGY DEPENDENCIES

Tera is entirely written in Java) over the NodeJS library as functional layer in order to take advantages of a robust and high level library designed to allow large and effective network node management.
The miner part is imported from an external repository and is written in C in order to get the best performances for this module.
Tera is actually officially supported on Linux and Windows.
If you start mining Tera thanks to this article, you can add my account 188131 as advisor to yours. On simple demand I’ll refund you half of the extra coins generated for advisors when you’ll solve blocks (@freddy#8516 on discord).

MINING TERA

Mining Tera has one major design constraint : you need one public IP per Tera node or miner. Yet, you can easily mine it on a computer desktop at home. The mining algorithm has been designed in order to be GPU resistant. In order to mine Tera coin you’ll need a multi-core processor (2 minimum) and some RAM, between 1 and 4GB per process that will mine. The mining reward level depends of the « power » used to solve a block (Top Tera Miners).

COST AND USAGE CONSIDERATIONS

There is two main cost centers in order to mine a crypto currency :
  1. the cost of the hardware and the energy required to make a huge amount of mathematical operations connected to the blockchain network through the Internet,
  2. the human cost in order to deploy, maintain and keep running miners and blockchain nodes.
As the speculation actually drives the value of crypto currencies, it is not possible to answer if the mining activity is profitable or not. Moreover, hardware, energy and human costs are not the same around the globe. To appreciate if mining a crypto currency is profitable we should take all indirect costs : nature cost (for hardware and energy production), human cost (coins and contracts usage, social rights of blockchain workers).

Original: https://freddy.linuxtribe.frecherche-et-developpement/blockchain-cryptocurrency-mining/tera-crypto-currency-project/
Author: Freddy Frouin, [email protected].
submitted by Terafoundation to u/Terafoundation [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]

I need some help with securely remote accessing my FreeNAS file server.

Hardware:
Intel Celeron G3930 2.9 GHz Dual-Core Processor
ASRock E3V5 WS ATX LGA1151 Motherboard
1 x 8GB stick of DDR4-2133 ECC memory
Toshiba P300 1TB harddrive x 1
An Evga 450W Bronze power supply or something like that
MSI nvidia 710 gpu because i found out there was no monitor port on the motherboard itself when I first tried to set up the system and it was the cheapest at the local Fry's.
I have a monitor that I currently use as a second monitor for my main pc but stick onto the FreeNAS server pc when necessary. I despise doing this because then using only the single monitor on my main pc makes me feel incomplete.
------Background Information
This is my first time doing anything with a server, and I only have basic knowledge of internet stuff. Probably more than the average idiot, but still basic enough to make me feel like I have no idea what I'm doing with ipv4 or whatever.
I managed to get FreeNAS installed a couple of days ago. Somehow it would only let me install with one usb drive and not the other (I mean from usb A to usb B would not boot up properly to install, but usb B to usb A worked perfectly fine). But I got it to work after that.
After it suddenly started giving me the 'this blahblah is taking too long to respond or whatever' message, I got it to work and set the ip to be constant, if that matters for anything.
I managed to get the owncloud plugin installed. However, no other plugins show up in the plugins available screen (It says "No entry has been found"). I already got owncloud installed and turned on, and owncloud shows up in the list of installed plugins already, so no idea if that's going to be a major problem or not.
-----Actual Question/Problem
Anyway, owncloud is running in a jail, and I was able to access the ip for owncloud and stick a picture file in it. However, while trying to use the desktop program for owncloud and syncing it to the server or whatever, it mentioned something about being unsecure or certificates or something. I also saw in a forum post (https://forums.freenas.org/index.php?threads/how-to-how-to-access-your-freenas-server-remotely-and-securely.27376/) from a few years ago that apparently a surprising amount of attempts to break in will happen or something, so that got me paranoid of my file server being assimiliated into a botnet. However, I can't seem to figure out how to get a certificate for security.
I set up an internal CA, which seems to enable me to make a certificate thingie, but what exactly I'm supposed to do with the certificate I made is unclear. I tried looking for a key thingie by searching for ssh on my main pc according to that forum post I linked in the previous paragraph, but that didn't do much. I DO have SSH enabled in services, as well. After that seemed to have no effect, I tried to set up a jail and do certbot, but it won't even let me create a jail, it just gives me something about a name error ("[warden_exception: fetch: http://download.freenas.org/jails/11/x64/freenas-standard-11.0-RELEASE.mtree: No address record http://download.freenas.org/jails/11/x64/freenas-standard-11.0-RELEASE.tgz: No address record mtree: /mnt/disk1/jails/.warden-files-cache/mtree/freenas-standard-11.0-RELEASE.mtree: No such file or directory ERROR: mtree failed for /mnt/disk1/jails/.warden-files-cache/mtree/freenas-standard-11.0-RELEASE.mtree cannot open 'disk1/jails/.warden-template-standard': dataset does not exist find: /mnt/disk1/jails/.warden-template-standard: No such file or directory ERROR: Failed to create ZFS base dataset ]") from https://forums.freenas.org/index.php?threads/howto-configure-official-certificates-for-freenas-using-lets-encrypt.55276/
So now I'm stuck with having no idea how I'm supposed to make it secure and I'm paranoid of making a botslave for some bitcoin mining hacker in yugoslavia or something. I just want to be able to sync some folders between my home pc and my laptop wherever I go.
submitted by OoglieBooglie93 to freenas [link] [comments]

Javascript Web Browser Mining

"this would be amazing for the simple reason that it would (give an option to) simplify mining for ANYONE. Imagine if my mum, who can turn on a computer and click Google Chrome but not much else, could simply click a link in her web browser and then she is mining, helping the orphans/charity, supporting the network, and possibly earning for herself.
If it could be set up to either enter your BBP address OR directly mine to the charity address then that would be perfect. In this way we can say to Christians in churches everywhere, if you want to help these chairties, simply click this link and leave it running. Simple." -znffal
"one-click mining idea, actually that is not too bad of an idea for those who really dont want to deal with a wallet. Normally this would be kind of hard to pull off, because you need either an ASIC standalone miner, or GPU, and all the settings, but with us, we have the integrated QT miner, and in a browser like IE, you could technically have an activeX control signed by biblepay, create the wallet.dat file and launch an instance in the pool. It would probably be better for us to start with a one-click package manager that automates the whole install, configures the miner, creates a pool account for you and launches. But I could see people losing their coins, not knowing what a wallet.dat is, not being able to log into the pool to pull the BBP out, etc. I think we would need at least a concise guide and some rudimentary understanding so they keep coming back. But anyway, if anyone wants to take the ActiveX idea and go to town you could build one using the QT compile and the info known by one of the new pools." -Rob
https://bitcointalk.org/index.php?topic=2042657.msg22934383#msg22934383
It looks like there is a more modern and less painful way to do it with node.js, so if this could work for BiblePay, that would be great news. You can look at the Monero web mining project Coinhive and see if it can be utilized
Very simple for the user and it just works off the bat. In every browser, without plugins, even on mobile phones. It can be tested immediately on the website. It's UI can even be easily customized etc.
And since recently it works for any stratum pool (although BBP pool doesn't look like it's using stratum). But maybe this code could be forked and tailored for BiblePay specifics, if someone is familiar with node.js. I would be willing to help since I have some small experience with node.js, but I don't know where to start, because I don't know the requirements of BiblePay." -inblue https://bitcointalk.org/index.php?topic=2042657.msg22944584#msg22944584
"I think this is an excellent idea! If it can be implemented in a simple way, like browsing to a certain url to start mining, I can really see this going places. I can imagine that a lot of technically unskilled people would like the idea of helping others by 'donating' a bit of cpu-power." -jaapgvk
"I also agree that the web-mining option would be a great way to lower the barrier to entry. One thing though - it must be OPT IN. By that I mean that there must be something that the user has to do to start it, so they are not unaware that it is running, in a very clear manner; e.g. a nice big shiny "Start Mining BiblePay" button and a notice that it will be (or 'is' if it only appears after clicking that button) using CPU resources while they are mining until they either close the page or click "Stop Mining". Making it start running as soon as you navigate to the page may lead to negative publicity, like The Pirate Bay and a couple of other sites received." -PhaseshiftUK

Quick Research
"JavaScript executes in your browser which runs threads on your CPU. There will be an efficiency loss compared with a miner running as a native app compiled from C++, but it could still be worthwhile if you can stand the energy costs"

"used WebAssembly to compile C code to Javascript. This means you'd need to be competent in C in order to attempt this feat."

"Look up asm.js and Webassembly. You can compile C++ into asm.js and with current browsers Webassembly. I tried it with Emscripten and it's fucking fast."

References:
More References:
submitted by togoshige to BiblePay [link] [comments]

I made a simple blockchain project and now wrote this guide for entrepreneurs interested in smart contracts

The following is the exact copy of my medium article. No need to go there if you prefer reddit. And please ignore my startup mentioned here. I spent a whole month writing this huge guide - it's far beyond a mere promotion. This post is about Ethereum blockchain. I do love it.
As I'm an entrepreneur myself (with some humble programming skills) I think I managed to explain clearly the practical side of Ethereum smart contracts - what can be done and how. Think this sub is the best place for it. Hope you'll find this helpful.
Will do my best to answer all your questions (please mind the time difference - I'm in Russia).

An entrepreneur, programmer and user walk into a smart contract - The ultimate Ethereum blockchain stratup guide.

Lifehack - you don't need to understand blockchain to build a smart contract startup.

I made my smart contract project and still feel as a total noob reading discussions on blockchain. There is so much to learn for me. But, hey, my project works! Why bother? Though blockchain is cool and it's cool to understand the technology, there is no need to understand everything.
Take a look at smart contracts from an entrepreneurs point of view - focus on how you can benefit from it. What kinds of projects you can actually do? What business models are there? What an MVP would look like? What it takes to engage a user, find a programmer and build infrastructure?
This guide with examples and exercises will show you the practical side of smart contracts and help you estimate your idea or generate a new one. Use it as a starting point for your further investigation.

What you do need to know about blockchain and what you may just skip

Mining. The first thing to skip. From an entrepreneur's point of view mining is more like playing the stock market - buy equipment, analyze reward price charts and decide which crypto currency to invest your computing power to. But if you are dealing with smart contracts, you don't have to care about mining for the same reason you don't care about Internet providers when visiting a web-site.
Blocks, hashes, cryptography and all that math - we gonna ignore it too. The important practical outcome can be reduced to this mantra: "Everything that gets into blockchain remains there forever, anything can be verified, but nothing can be changed". In practice it means that data is stored permanently, transparently and securely.
Now let's turn to the terms you cannot do without and explain them as if it's year 2005 now.
Blockchain is like a BitTorrent network. A program on your computer downloads files and afterwards gives them away. But the program is called blockchain client rather than torrent client. And those files you download store transactions instead of videos and music. Sender, recipient, date-time and ammount - records are stored one after another (yes, they are stored in blocks, but who cares). Everybody who runs blockchain client has his own copy of the whole blockchain database and keeps all transactions that have ever been made. This database is huge. Ethereum blockchain is currently about 43 GB, Bitcoin is 125.78 GB. todo
Cryptocurrency is a list of money transfers. In blockchain world your balance is not just a single record, but the sum of all your receipts and expenditures (the entire transactions history). If a blockchain stores transactions which only contain money transfers (sender address, recipient address and amount being sent), we call this type of blockchain a cryptocurrency. Bitcoin - is a cryptocurrency. But any transaction is just a string in a file, thus it may contain any information. An address in turn may not belong to a human... which gives us much wider opportunities then just a crypto currency.
Smart contract is like a web site. A blockchain address may belong to a program. A program then is called a smart contract. It is called a contract just because the code is open. However it is simpler to compare it to a web site (or web service). For example, a classified advertisements service could be a smart contract. Its code would be stored at a particular address in the blockchain - just like a web site url. A transaction to this address would not contain money but an advertisement text. And the smart contract would publish this advertisement, i.e. saves to blockchain.
Ethereum is like the Internet Ethereum - is exactly the kind of blockchain in which transactions may contain not only money, but data. The blockchain database (those files one downloads) stores transactions between people, transactions involving smart contracts and contracts source codes. This makes Ethereum kinda new type of the Internet, which is stored locally by everyone involved.
And that's really enough for the theory. The rest you'll learn from what it all means in practice.

What is the difference between a smart contract and a conventional web site

What are the advantages (and disadvantages) of a smart contract driven service.

Openness and Encryption

A user doesn't have to trust you. "Everything that gets into blockchain remains there forever, anything can be verified, but nothing can be changed". The user sees exactly how your system works (smart contract code is open) and stays confident in the reliability of your database (database is transparent and unchangeable). Meaning there is no need to win users trust.
For example, you can turn a classified advertisements service into an open auction with charity donations. The process of selling would look as follows. A seller sets the initial price and posts a lot. After that anybody will be able to track bets, see a winner, see how much seller earned and how much was deducted to charity and to platform commission. Everybody is confident there was no cheating.
Where it benefits most. Gambling (Roulethvdice.io), prediction markets (Augur, Gnosis), voting, multilevel marketing (TheMillionEtherHomepage).

Payment processing "out of the box"

You don't have to deal with any payment processing services. Solidity language with which smart contracts are written incorporates all the necessary money (Ether cryptocurrency) operators. User balance is just another variable in your code. You can program any behavior to it - like triggering an event on receiving a certain amount of money or making a multisignature payment and much more. That is why Ether and other cryptocurrencies are often referred to as programmable money.
Where it benefits most. Crowdfunding platforms (Weifund, Wings.ai), rent services Golem - rent unused CPU/GPU cycles.

Decentralization

You don't have to worry about DoS attacks and scalability. Every blockchain user has it's own smart contract copy locally on his computer, thus it will withstand any load, free of charge.
Where it benefits most. Smart contracts gave rise to a totally new kind of companies - decentralized organizations (DAOs). DAO is a separate phenomenon worth studying. In the meantime, just ask yourself: "Why do we need an intermediary like Uber, if it is possible to connect a driver and a passenger through a smart contract directly?". What prospects does it opens? Have a look at this startups: Arcade city and Lazooz.
Lifehack: When googling for A DAO, ignore the hassle around THE DAO). The only reason THE DAO failed was braking some basic smart contract safety rules (we'll discuss them further).

Transaction delay and commission

A user have to pay for every transaction and have to wait a bit too. The average transaction is mined (read included) into Ethereum blockchain in 14-15 seconds. There is a high chance of reducing this delay down to 4 seconds in the near future. But even then we are all got used to a better responsiveness. Moreover a simple money transfer (two addresses involved, no contracts, minimal amount of data) would cost about 0.000861 ETH ($0.02 in March 2017). These "drawbacks" are tiny, but enough to build a heavy threshold for certain types of projects.
Where it doesn't benefit. A chat for example. Each message chips a couple of weis (Ether denomination) off your balance and requires half a minute to reach the other end. This is probably a bad idea for a startup unless you are dealing with some official correspondence, which requires legal force and does not require privacy.
With smart contracts you can choose almost any web service and make it blockchain. Plus you are free to create completely new blockchain-only types of projects. See what has already been done, mix it up with Internet of things, artificial intelligence, virtual worlds or fintech, and you'd most probably get a unicorn.
Note: You can make a smart contract with Bitcoin too, but it's like doing 3D in MS Excel. Kinda possible, but why?

What business models are there

You are free to use any business model. But first have a look at what have already become a new standard in Ethereum - tokens.
In conventional terms tokens business model is like crowdfunding and IPO combined. The "crowd" buys shares of your company instead of products. And in the future the shares (tokens) may be sold or exchanged for your services.
This became possible because Solidity (Ethereum smart contract language) allows issuing your own cryptocurrency.
For example. You came up with a classified advertisement platform idea. You want it to have its own internal currency (tokens) called Advertisement (ADV). You want to charge 1 ADV for placing an advertisement, 2 ADVs for pinning it to the top and 0.2 ADVs for updating. You write a smart contract. All that it is capable of at this point is receiving money (ETH) and keeping users balances.
Now you announce your platform in a way that crowdfunding projects usually do and offer to buy ADVs at low cost 1 ADV = 1 ETH. Later when your platform is live you'll set the ADV price to 10 ETH. After that those who invested in the very beginning will be able to sell their ADVs gaining income or place their ads 10 times cheaper than the current price. But for now you've earned your ETH to spend on development.
Tokens are attractive enough on their own to start experimenting with smart contracts.

What it takes to engage a user

Ok. You published your first smart contract. But what it takes to engage a user with no blockchain experience to use it? And how can we lower the threshold?
We can break user experience into two parts: interacting with blockchain (what a user has to do anyway) and interacting with your smart contract (ways we can make a user's life easier).

Interacting with blockchain

What a user has to do anyway.
Get an address (a wallet). An address and a key to it is like username and password. There is no way to interact with blockchain without it. The easiest way to get it is to use generator at MyEtherWallet.com. It takes less than one minute and as a result, user receives an address and a key. The address is a 42 character sting and the key is a small file. The key file is used to sign transactions and has to be saved as securely as possible - there is no way to restore it. A user can use the same address to interact with any smart contract.
IMG: Generate a wallet at MyEtherWallet.com
Get some ether (ETH). Any transaction requires commission (0,001 to 0,01 ETH on average). A user has to fuel up his address with a sufficient sum to interact with your contract. Buying ether is possible through major exchanges. These exchanges require 1-3 day for identity approval and are available in a limited list of countries. Users from other countries and those not eager to wait (especially when buying Ether worth a couple of bucks) may use almost instant alternatives.
Look and feel exercise: generate a wallet and send some Ether to it.
Access a blockchain client. Any interaction with blockchain and with any smart contract accordingly is done through a blockchain-client.
As of March 2017 downloading Ethereum database to an HDD disk (70% are still using HDDs) requires 2-3 days and 43 GB of spare space. It makes computer unresponsive enough to start throwing things at it. Keeping blockchain in sync too requires about the same amount of resources as watching a movie online does.
Not to confuse the pros. For the sake of simplicity we call EthereumWallet, Mist browser, geth and parity the blockchain client. We are entrepreneurs here, it is only a programmer who should really know the difference.
There is also a so called light client. It doesn't require downloading the database. But it still requires installation and getting hands dirty with manuals. Our target audience is not willing to do it either.
So let's be realistic our target audience will hardly install any blockchain client on their computers. Let's see how we can help.
A necessary and sufficient minimum for a user to start interacting with any smart contract is an address (key file) and a tiny amount of ether on it.

Interacting with your smart contract

We got to simplify user experience with a graphical user interface (GUI). In Ethereum GUIs do not belong to smart contracts and are stored off the blockchain. There are several ways to "attach" GUI to a smart contract. Here are they from the least to the most user-friendly.

Smart contract with no GUI

Users can interact with smart contracts directly, with no GUI at all.
Blockchain client can identify smart contract functions and let user work with it. The client provides auto-generated GUI so a contract looks and feels like a sign-in form of a website. This is a straightforward way of writing to and reading from contract.
IMG: Access contract function through Ethereum Wallet
But we agreed we won't force user to deal with blockchain clients. To set user free from it we can try to offer MyEtherWallet.com (an online client). Contract interaction will look just the same, but there is no need to download or learn anything.
IMG: Access the same function through MyEtherWallet.com
The contract without GUI has to be very well documented. It is also a good idea to make a landing page to display the current state of the contract.
For example, TheMillionEtherHomepage.com displays the state of the underlying contract and offers users to work with it directly giving all necessary instructions. The same setup would likely be a minimum for a classified advertisements smart contract. So the user with no blockchain background would be able to grasp the idea of the service.
Look and feel exercise: Try following sign in instructions for TheMillionEtherHomepage.com (it's free) and see what it is like to use MyEtherWallet.com.
A Smart contract without GUI will do as a minimum viable product

Decentralized application (DApp) - GUI in a browser

In the above example the website doesn't allow writing to the contract being just a representation of its state (it only reads from the contract). To let user interact with your contract (read and write) through your own GUI you gonna need a DApp. DApp is a GUI for your contract in a browser.
A browser can simultaneously connect to the Internet and to a blockchain client. This allows a smart contract to look (and work) just like a conventional web-site. A user will follow a link like http://myClassyAdvertisements.com and see your website in the full beauty of HTML, CSS and JavaScript, then will be prompted to fill ad text and click "publish". The only difference the user will notice is a pop-up offering to select a keyfile on the disk instead of asking for a username-password.
The GUI is taken from the Internet, but transactions are sent to a local blockchain client.
Browser can connect either to full or light blockchain client. We discarded them both. There is a browser with "included" client - the Mist browser. But it is too complex too. The easiest solution is the Google Chrome plugin Metamask which brings all blockchain benefits right into the browser. This is what we want our user to install.
Look and feel exercise: Go to tokens exchange platform Maker Market, then install Metamask Chrome plugin and try Maker Market again. See how metamask brings blockchain functionality to the website.
DApp and Metamask browser plugin make your smart contract look and feel just like a web-site

Mobile application

We can make any GUI for mobile or desktop application and bring any feature to it. But in order to send transactions it has to communicate with a blockchain client too.
The ways to do it without any locally installed client are: embedding a light client right into your application or communicating with a remote blockchain client (see infrastructure section further).
Look and feel exercise: Try installing Jaxx wallet or Free Wallet on your phone.
To engage a user with no blockchain background means to make him get an address, buy a bit of Ether and install your mobile app or Metamask browser plugin.

What it takes to build an infrastructure

Let's turn to even more practical (and technical) parts. First what will you have to buy. From the cheapest to the most expensive setup.

Smart contract with no GUI

Regardless of the way you've implemented the GUI, you need to publish your contract first. Publication of a contract is a transaction too. Commission for it is negligible. If you managed to pay 1 ETH for commission, then your project is larger than the majority of existing ones.
Project documentation may be published for free at readthedocs.com. Or upload instruction videos to youtube.
If you want to display the status of the contract on a web-site the way TheMillionEtherHomepage.com does, you have to develop a back-end that will "listen" to the contract through a blockchain-client. Thus you need a hosting to run your website, blockchain client and your blockchain client "listener".
Before buying a hosting check out Etherscan.io and Infura APIs. These are "remote" blockchain clients which will probably let you build your landing page with pure Javascript and no back-end.

DApp

DApp is just a web page (HTML, CSS, JAvaScript). A simple hosting with no database and frameworks support will probably be enough for a start. Remember your user has to interact through his own client (a local one or Metamask). So introduce a version for those with no access to blockchain (see a paragraph up - make a web-page representing your smart contract status).

Mobile App

For a mobile app you'd probably need a server with a running blockchain client to let your app communicate with the blockhain through it. Or you can embed light client right into your app. Or use Etherscan.io and Infura API. Depends on your features. A more detailed (and more technical) guide is here - Mobile: Introduction

Which developer skills are required

What kind of developers skills you want to search?
First - responsibility, second - patience and third - JavaScript front-end skills. Safety first, because failure price is very high.

Smart contract with no GUI

Ethereum has its own language for smart contracts which is called Solidity.
The language looks very much like JavaScript and simple to learn. But one has to be really really really careful writing smart contracts.
Any contact is open source. Anyone can copy it and quietly experiment with attack options before an actual attack. With no thought out bug fixing strategies, neither address nor contract code can be changed after its publication. If there is a vulnerability and no escape paths, you'll helplessly observe your balance approaching zero. So it was with the ill-fated DAO (remember the life hack - The DAO is just an example of how one shouldn't write smart contracts).
Responsibility. Ethereum community recommends writing smart contract as if it were a firmware for electronics or a financial service (but NOT a web-site). For anyone eager to write smart contacts this official document on safety is a must.

DApp

DApp is HTML, CSS and JavaScript. JavaScript library web3.js provides interaction with blockchain client. A front-end developer will do the job.
Patience You need a patient and curious developer. This is the person to dive deepest into blockchain technology, make raw developer tools work and read through tons of documentation.
Regardless of whether your contract has a GUI or not, you gonna need a JavaScript developer. As it is strongly recommended (no, it is actually a must) to cover close to 100% of smart contract functionality with tests, which are written in JavaScript. Detailed developer guide is here here.

Mobile apps and back-ends

Mobile and desktop applications can be written in any language. Recommendations are the same as for the DApp. To connect your app to a blockchain client (full, light or remote) there are ready-made libraries available. For example, python. To embed a light client, check out geth.

Conclusion

Lifehack: Jump off the cliff and build wings on the way down © Ray Douglas Bradbury.
There are only 368 dapps listed at the official Ethereum dapps list and only one third of them is live. I believe this indicates the lack of understanding, not possibilities. It makes Ethereum a great chance to build a future game changer.
You may get some insights learning technology deeper. It is useful to know many of the underlying concepts of Ethereum and blockchain technology in general. But for the smart contracts and for the start this guide is a enough.
As you've seen there is not much complexity. If you are already dealing with websites and JavaScript all you have to do is pump up your team's responsibility. And if you already have an idea, just give a test flight. And see how high you can go.
Thank you for reading.
submitted by takeshi_reg to Entrepreneur [link] [comments]

BitLitas

BitLitas
We introduce you the new Lithuanian cryptocurrency - BitLitas (LTL)
What is BitLitas?
The Lithuanian Litas has been a distinct unit of currency during separate periods in its history until it was replaced by Euro in 2015. Come 2018 - the 100 year anniversary of the restoration of independence for Lithuania, seeing the rise of multiple national cryptocurrencies and believing it has not only the right but also the potential to exist we resurrected Litas back to life as a digital cryptocurrency BitLitas (LTL). The currency based on blockchain technology.
By using the common European currency we are partly dependent on EU where the birth of Bitlitas if needed could return that monetary exchange power to people. In the wake of different cryptocurrencies in the world we think there's a demand and space in Lithuania for decentralized services. If needed it could bear the benefits of resisting the possibilities of government corruption where everyone could choose other means of exchange that ineffective government just can't control.
We do not want to reinvent the wheel and chose Cryptonight technology as the core because of its high privacy level. Transactions go through open ring, it is signed by 3-5 or more users and therefore the real sender can not be identified. The quantity of transaction is hidden too. Basically you could call it the Lithuanian hard fork of Monero which aims to be a fungible and untraceable digital medium of exchange and has a higher degree of privacy than Bitcoin blockchain where all the transactions of any participants are fully traceable and can lead to censorship of the assets. With BitLitas you have enhanced privacy, independent and decentralized system of free exchange medium. Decentralized P2P cryptocurrencies do not belong to anyone. It is supported only by the initiatives of anyone wishing to participate in the open code community and only the holders of BitLitas determine its real market value ruled solely by the law of supply and demand. It can also be mined by anyone providing computing resources to support the network where everything gets determined by mathematical algorithm.
The number of people interested and getting involved is very promising. Even after simple steps in the near future such as spreading the word on social media we are definitely expecting to see a much bigger interest. We have ambitions to further develop and apply the exsisting BitLitas platform to be suitable and easily integrated for online retailing. There are many technological approaches that could allow to use the new Lithuanian cryptocurrency more easily and widely.
We learned there are many bright minds and crypto enthusiasts not only in Lithuania so we encourage them to come together, innovate, support the project join and benefit the open code community. If someone wishes to participate in development and improvement please don't hesitate to contact. Everyone is mostly welcome.
Specification
Max supply: 18M Coins Symbol: LTL Hash algorithm: CryptoNight (Proof-Of-Work) Block reward: 15.9x LTL (decreases each block) Block time: 60 sec Block Maturity: 60 blocks
Features
Anonymity & data protection Untraceable payments Unlinkable transactions with random data by the sender ASIC-resistant, only CPU/GPU mining Fast transactions Very low fees
Roadmap
2018 Q1-Q4: BitLitas blockchain launch BitLitas pool launch Windows wallet Linux wallet MAC wallet Android app iOS app Exchange listings Own exchange launch WooCommerce/PrestoShop/Magento/WHMCS[/OpenCart plugins Web wallet
Exchange
Coming soon...
Unofficial LTL trading Discord Channel
Links
Website: https://bitlitas.tech | local: https://bitlitas.lt Official pool: https://pool.bitlitas.tech | local: https://pool.bitlitas.lt Blocks explorer: https://explorer.bitlitas.tech | local: https://explorer.bitlitas.lt Windows GUI wallet: https://github.com/Bitlitas/bitlitas-gui/releases/download/v1.0.2/BitLitas_Wallet_v1.0.2.zip Linux CLI wallet: https://github.com/Bitlitas/bitlitas Android app: https://play.google.com/store/apps/details?id=com.litas.ltlwallet GitHub: https://github.com/Bitlitas Discord: https://discord.gg/UXkwJfC Twitter: https://twitter.com/bitlitas
Donation
Donations will be used to fund development and bounty/community projects
LTL: 439UJXHNUDDLwX3ip1J8UWMHB3wT5hmaT37LRswahuXNFcbriRfa9G5Kzpb7ziALrv81potK9amZKNm 3Yz5FFrhG1mubdMU ETH: 0x2456e3Df3c822C0BD4208a310B822b8D4a5437A2 LTC: MWLQZYvpXfuCLJZh2L8nXEBdG7t8tFR1xv
Thank you!
submitted by BitLitas to u/BitLitas [link] [comments]

CRYPTOCURRENCY MINING: WHAT YOU NEED TO KNOW

Ever since Bitcoin and other forms of cryptocurrency strode into the scene, cryptocurrency mining has become a topic of discussion among computer enthusiasts and interested parties looking to make money or have an alternative revenue stream going.
For those of you who've ever thought about Bitcoin, or ethereum, or monero, and wanted to get into the mining side of things, there are a couple of things you need to know beforehand.
What is cryptocurrency mining?
For the most part, cryptocurrency mining is essentially a form of digital bookkeeping.
A miner performs accounting actions (also known as transaction verification) for the coin network of his choice. He gets paid for the service with a fraction of cryptocurrency every few days.
What do you need to mine cryptocurrency?
You'll need a couple of things just to get started, aside from cryptocoin wallet where cryptocurrency will go into.
Here's a basic list of things needed adapted from Lifewire's beginner's guide:
a custom-built computer for mining cryptocurrency a graphics processing unit (GPU) which will do the bulk of accounting services and mining for you cryptocurrency mining software reliable internet connectivity of at least 2Mbps and higher A membership at a currency exchange so you can trade in your cryptocoins for money It may sound easy, but it's not cheap or as simple a solution as one may think.
Malicious cryptomining is becoming a thing
Yes, it is an expensive enterprise to set up even just one miner. The returns do not necessarily justify spending as much unless you're willing to go in it for the long haul and with multiple machines running.
That said, you'll also need to find a place with adequate cooling for the miners, as cryptocurrency mining computers generate oodles of heat.
To actually make a profit, you generally need to invest a lot, and ensure you have cheap electricity, or you'll be spending more money before you could ever strike it rich.
That said, unscrupulous actors have taken to using malware against people's devices for mining. Through malware, the cryptominers use other people's electricity for their mining ventures, either to offset or eradicate the costs of setting up a mining empire, with all the malware-affected devices providing profit instead.
For instance, there is the hacked plugin Browsealoud, which was used for a few hours by millions of visitors to websites with the hacked plugin to mine cryptocurrency for the actor before it got shut down.
There is also something called drive-by cryptomining. When Coinhive, a cryptocurrency mining API for Monero on browsers, was released, it allowed people to attack others on the browser level. A notable case involved someone using the Android devices of millions of users to mine Monero.
MalwareBytes, in a recent report, also noted the rise of spam and exploits, as well as Mac-based cryptominers making the scene for malware makers looking for a payday.
Cryptomining hits the environment too
That isn't to say cryptomining doesn't have its own physical issues. As we mentioned earlier, cryptomining generates heat, and you need electricity to power the computers and the cooling you'll be using on a cryptominer.
As a result, cryptocurrency mining eats up a lot of electricity, and in one study, bitcoin mining now consumes more electricity than 159 countries.
Digiconomist’s Bitcoin Energy Consumption Index, as of Monday, November 20, 2017, said Bitcoin’s current estimated annual electricity consumption is at about 29.05 Terawatt-hours (TWh). That's equivalent to 0.13% of the total global electricity consumption.
What does this translate into? Depending on where you live, that could mean an increased use of fossil fuels.
In a Futurism report, it's been said that even if hardware improves to cut electricity consumption, "it seems unlikely that serious miners would cut down on their efforts simply because they can use less electricity in the process."
The report added, "even as hardware gets more efficient, there will be no drop in consumption – and that could mean that this problem will only get worse."
Should you get into cryptocoin mining?
Unless cryptocurrencies die out suddenly, cryptocoin mining will remain a big thing. It is not an easy, or necessarily environmentally-friendly way to make money, so you can't really generate it as a second income stream.
If you're willing to spend some money to turn your gaming PC into a cryptocoin mining rig, however, it may keep you warm on a cold night while you sleep. (Actually, someone has done this already.)
That's at least one of the quirkier unintended consequences for cryptominers moving forward.
https://www.rappler.com/technology/features/197115-what-is-cryptocurrency-mining-cryptomining-what-you-need-to-know
submitted by wcriptnews to u/wcriptnews [link] [comments]

GPU load stays at 100%

When I watch a youtube video (1080p or 720p) GPU load goes to 100% about 1/4 or 1/2 the way through the video and stays that way even when Firefox is closed.
Is this a known issue with the flash plugin or is my machine being used to mine Bitcoin for someone through some other means? The GPU usage stays at 100% until I sign out or restart, then only returns after watching a youtube video. Other videos appear to be fine.
Firefox 57.0b5 (64-bit)
Extensions: BetterTTV, Disconnect, Firefox Notes, Ghostery, Min Vid, Popup-Blocker, Provacy Badger, Pushbullet, Reddit Enhancement Suite, Test Pilot, uBlock Origin, Wayback Machine.
Plugins: OpenH264 Video Codec, Widevine Content Decryption Module, Shockwave Flash 27.0 r0
CPU: Ryzen 7 1700
GPU: Asus Strix Rx480 8GB
Ram: 16GB DDR4
http://gpuz.techpowerup.com/17/10/04/n4v.png
https://imgur.com/a/Csst4
Edit: Some clarity
submitted by ryunokage to firefox [link] [comments]

[CANADA-BC] [H] Crypto Currency Mining Enclosure and hardware FULL setup sale [W] $ or Bitcoin

I own a crypto currency mining investment company and I'm selling off the current hardware setup. It has been in use since mid-March of 2014. I've had a series of unfortunate events occur in my personal life that require me to sell off my business's hardware and other personal items.
This is for a firm priced sale, I am looking for a buyer that is either wanting to get into the mining business and wants a GPU based setup that can tackle all the new algorithms VS ASIC based setups that go obsolete within months and have no resale value. Or a buyer that wants to expand their mining farm or mining business and would love a plug-n-play type setup where the only thing they are required to do is have one power feed wired into their warehouse or home panel. This would be for local pickup only most likely. It will require the buyer to have a truck or to rent a u-haul type of moving truck. The system is roughly 60 inches tall by 95 inches long by 24 inches wide, not sure on its weight but moveable if the cards are removed(the cards are designed to be plug-n-play as well, no screws, just pop out pop in.) and runs at 240v for PC hardware and 120v for fans/misc regular appliance plugins(routers/switches etc).
The enclosure houses 8 systems which consist of 46 R9 280x video cards (it has room for expansion), has its own built in surge protection system to withstand lightning and other outside-the-enclosure based surges, whole system runs at 240v for best efficiency, has a 100amp breaker panel which is attached to the enclosure for maximum expansion.
The enclosure has 6x20 inch box fans which provide the 24/7 constant air flow for the video cards. I have two other 20 inch box fans that are for in and out airflow for fresh air circulation. All video cards are easy to access and can easily add or remove cards to/from the unit. I built the enclosure design in-house.
Serious inquiries ONLY, I have priced this as fair market price for used hardware among the enclosure costs which include the power panel, surge protection, cable runs, professional electrical hardware/electrician fees etc. This is a full plug and play type enclosure setup for any mining farm out there. Originally built for $33000~, I'm strictly selling it at a fair hardware priced value with cutting out a lot of the fee's that you would have to pay for an electrician to wire up your own custom enclosure and the electrical hardware. Cash or Bitcoins only.
Asking $15000 Canadian firm. Also I am located around Vancouver, British Columbia, Canada.
Pictures: https://imageshack.com/a/rmAz/1
It consists of the following hardware:
GPUS:
-40x Powercolor Radeon R9 280X OC 1030MHZ 3GB 6.0GBPS GDDR5 DVI HDMI 2XMINIDP PCI-E Video Card http://www.powercolor.com/Global/products_features.asp?id=512
-6x ASUS Radeon R9 280X OC 1070MHZ 3GB 6.4GHZ GDDR5 2xDVI HDMI DisplayPort PCI-E Video Card [R9280X-DC2T-3GD5] http://www.asus.com/Graphics_Cards/R9280XDC2T3GD5/
Motherboards:
-5x H81 Pro BTC http://www.asrock.com/mb/intel/h81%20pro%20btc/
-2x Gigabyte 990FXA-UD3 AMD990FX ATX AM3+ DDR3 4PCI-E16 2PCI-E1 1PCI SLI SATA3 USB3.0 Motherboard [GA-990FXA-UD3] http://ca.gigabyte.com/products/product-page.aspx?pid=3996#ov
-1x asrock 970 Extreme3 http://www.asrock.com/mb/AMD/970%20Extreme3/
Power Supplies(All PLATINUM RATED for best efficiency and running at 240v):
-14x Corsair AX1200I 1200W Digital ATX 12V 80 Plus Platinum Modular Power Supply 140mm Fan http://www.corsair.com/en/ax1200i-digital-atx-power-supply-1200-watt-80-plus-platinum-certified-fully-modular-psu
-1x Corsair AX860I 860W Digital ATX 12V 80 Plus Platinum Modular Power Supply http://www.corsair.com/en/ax860i-digital-atx-power-supply-860-watt-80-plus-platinum-certified-fully-modular-psu
-1x Antec HCP-1300 Platinum power supply http://www.antec.com/product.php?id=706569&fid=343
CPU's:
-5x Intel Pentium G3220 Dual Core 3.0GHZ Processor LGA1150 Haswell 3MB Cache Retail [BX80646G3220] http://ark.intel.com/products/77773/Intel-Pentium-Processor-G3220-3M-Cache-3_00-GHz
-1x AMD FX 4-Core Black Edition FX-4130 [fd4130frgubox] http://products.amd.com/en-gb/DesktopCPUDetail.aspx?id=808&f1=&f2=&f3=&f4=&f5=&f6=&f7=&f8=&f9=&f10=&f11=&f12=
-1x AMD Athlon II X2 250 (3.0GHz, 65W, 2MB total dedicated L2 cache, 4000MHz HyperTransport™ bus, socket AM3) http://products.amd.com/en-gb/DesktopCPUDetail.aspx?id=691
-1x AMD Athlon II X2 270 Regor Dual-Core 3.4GHz Socket AM3 65W Desktop Processor [ADX270OCGMBOX] http://www.cpu-world.com/CPUs/K10/AMD-Athlon%20II%20X2%20270%20-%20ADX270OCK23GM%20(ADX270OCGMBOX).html
Memory:
-1x Corsair XMS3 CMX4GX3M2A1600C9 4GB DDR3 2X2GB DDR3-1600 CL 9-9-9-24 Core i5 Dual Channel Memory Kit [CMX4GX3M2A1600C9] http://www.corsair.com/en/cmx4gx3m2a1600c9
-1x Corsair Vengeance Blue CMZ8GX3M2A1600C9B 8GB 2X4GB DDR3-1600 CL9-9-9-24 Dual Channel Memory Kit [CMZ8GX3M2A1600C9B] http://www.corsair.com/en/vengeance-8gb-dual-channel-ddr3-memory-kit-cmz8gx3m2a1600c9b
-1x Kingston HyperX 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model KHX1600C9D3K2/8GX http://www.kingston.com/en/memory/search/?partid=khx1600c9d3k2/8gx
-1x Corsair 6GB Triple Channel DDR3 Memory Kit (TR3X6G1600C8D) http://www.corsair.com/en/tr3x6g1600c8d
Hard Drives:
USB flash drives for hard drives
-2x Kingston 8GB USB3.0 DataTraveler 100 G3 USB Flash Drive [DT100G3/8GBCR] http://www.kingston.com/datasheets/dt100g3_en.pdf
-6x Kingston 16GB USB3.0 DataTraveler 100 G3 USB Flash Drive [DT100G3/16GBCR] http://www.kingston.com/datasheets/dt100g3_en.pdf
Misc accessories/electrical for the enclosure:
-1x D-LINK DSS-8+ Unmanaged Desktop Switch, 8-Port, 10/100 Mbps http://www.dlink.com/si/sl/support/product/dss-8plus-8-port-10-100-desktop-switch
-all cat5e cables included.
-18x Heavy-Duty Power Cord, 15A, 14AWG (IEC-320-C13 to NEMA L6-20P) 6-ft.(2 spare for expansion can order more however). http://www.tripplite.com/heavy-duty-power-cord-iec-320-c13-to-nema-l6-20p-6-ft~P011006/
-1x Leviton 51120-1 Panel Protector, 120/240-Volt(surge protector) http://www.leviton.com/OA_HTML/ProductDetail.jsp?partnumber=51120-1§ion=39955
-18x Leviton 2320 20 Amp, 250 Volt, Flush Mounting Locking Receptacle, Grounding, Industrial Grade, V-0-MAX (Black) http://www.leviton.com/OA_HTML/ProductDetail.jsp?partnumber=2320§ion=40369
-2x Belkin 12 Outlet Home/Office Surge Protector with Phone/Ethernet/Coaxial Protection and Extended Cord 4156 Joules http://www.amazon.com/gp/product/B000HPX46U/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
-9x Lasko #3720 20" Weather-Shield Performance Box Fans http://www.amazon.com/gp/product/B000BOCD1Y/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
submitted by phi0x to hardwareswap [link] [comments]

The Future of Litecoin: An Essay

Big things are currently in the works to further litecoin, specifically. Payment plugins for the major CMSes are being developed. Coders in the community are working insane hours in order to get their concepts to market. As of now, those that are mining are the majority holders of litecoin. The first wave of merchants accepting Litecoin will be aimed specifically at the GPU miner. Once, and only once, you understand the type of person it takes to run a successful GPU mining operation, you will then understand what the future holds for litecoin.
The thing is, the successful GPU miner usually carries a diverse skillset as opposed to a single discipline. You have to be proficient with hardware, code, operational and network security, just to name a few. What ever a miners weakness, there's someone within the community that is proficient in that field and willing to give advice, tips and direction. Then again, its also a matter of how you present youself to the community.
If you don't take yourself seriously, don't expect anyone within the mining community to either. We are businessmen with a twist: our business is our livelyhood. Do realize this: in the world of business, respect and trust are built on your actions, presentation, associations and resolve. Respect is not an entitlement and trust must be built over time.
Also note that litcoin is still in its infancy. If you look to bitcoins infancy, it was far more obscure and was used far more illicitly. We are at the door of an incredible opportunity. We can do right with litecoin what was done wrong with bitcoin in its earlier days. A fresh face without the dark past that is growing at a rate far greater than any other crypto currency its age.
You won't be buying a pizza with 10,000 litecoins. Not now. Not ever.
submitted by minedeep to litecoin [link] [comments]

What entity manages .com, .net, .gov, .us, .cn domains?

For the longest time I still have not a clue how this works. I am not sure if this is the right subreddit or something like networking
This is all I understand so far about the web (or internet?), computers, and electronics in general (its super long just skip to bold part if you need to)
INTERNET:
Okay, but who manages the .info, .com, .net, .cn, .rs, and .gov top level domains?
There's obviously some domains that are specific to countries, and are most likely managed by that countries' government entity. E.G (.us for usa? .ws for russia, .cn for china) but aren't nearly as popular as the .net and .com domains.
.Org and .gov are US? government regulated top level domains to my knowledge, where .org is mostly nonprofit. U.S.A uses .gov domains for its government organizations
So I understand that some countries government manages that domain. But what about public top level domains, like .com, .info, .net, .ca?
Who manages the database for those? Who gives authority to godaddy for those domains for rent? Who mediates copyright conflicts for those domains? (E.G. say my name is Mike Cro Soft, and I wanted to rent a domain called mikecrosoft, but get DMCA'd / copyrighted by microsoft.com)
Like, what are the big organizations mediating internet protocols and legislation on a global scale?
Who or what has access to the biggest picture of the web, and its workings and backend?
sorry for the long wall of text, I've been missing some vital information on how the web? (or is it internet?) works
disclaimer: I don't take CS classes and did not major in computer science. So I might be really off in what i understand about the internet as a whole. Most of this is just what I learned from browsing reddit and youtube
Apologies in advance if i butchered a bunch of terms and how things work. I just wrote things as they randomly came to me
submitted by Rubick555 to AskComputerScience [link] [comments]

How To Mine Bitcoin With Laptop -Easiest Way- - YouTube How To Mine 1 Bitcoin in 10 Minutes - Blockchain BTC Miner ... Should YOU be GPU MINING Cryptocurrency in 2020?! - YouTube Nvidia RTX Graphics Cards Good for Mining? Nvidia RTX 2070 ... Dummy plug for GPU for cryptocurrency mining

If you have the right mining rig, you can make more profits in the business. Today I will share my experience using an 8 GPU mining rig. I will tell you how I build it and what factors you should consider to build an 8 GPU mining rig. Index The dawn of mining, when an … The guide to mining with an 8 GPU rig Read More » The 21 Bitcoin Computer isn’t the typical USB Bitcoin miner. It does, however, plugin to your computer via USB. In terms of $ / hash rate, it’s not a very good choice. But since it’s still technically a USB miner we have included it in this list. If you’re not impressed, we don’t blame you! USB Bitcoin mining was only profitable when Bitcoin was in its early years. If you just want ... Mining > GPU > NVIDIA GeForce GTX 1060 6GB. How profitable is mining with NVIDIA GeForce GTX 1060 6GB? NVIDIA GeForce GTX 1060 6GB can generate more than 15.39 USD monthly income with a 20.42 MH/s hashrate on the ETH - Ethash (Claymore) algorithm. Algorithm Hashrate Monthly Income Monthly BTC Income ... Best mining GPU 2020: the best graphics cards for mining Bitcoin, Ethereum and more By Matt Hanson , Michelle Rae Uy 18 August 2020 Join the cryptocurrency craze with the best mining GPUs Cara mining Bitcoin dengan GPU atau CPU – Untuk bisa mendapatkan Bitcoin gratis dengan cepat Anda bisa menambang Bitcoin. Saat ini harga Bitcoin sedang tinggi-tingginya tentu akan menggiurkan jika bisa mendapatkan Bitcoin tersebut dengan cara gratis. Proses penambangan tersebut bisa dilakukan dengan berbagai macam cara misalnya saja adalah dengan perangkat sendiri atau dengan menggunakan ...

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How To Mine Bitcoin With Laptop -Easiest Way- - YouTube

Mining BTC With: CPU AMD Ryzen Threadripper 1950X 3.4 GHz 16-Core 32 Threads & Dual Nvidia GEFORCE GTX 1080 Ti Fanpage facebook: https://www.facebook.com/Lit... Buy Raspberry Pi 4 Model B 4GB: https://amzn.to/2tlBfGW How to Setup a Raspberry Pi 4 Bitcoin Mining Rig w/ Bitmain AntMiner U3: https://youtu.be/dPWTSytzN7g... Mining Bitcoin is as easy as installing the mining software on the PC you already own and clicking start. Anyone can do this and see the money start rolling ... Are RTX graphics cards better for crypto Bitcoin GPU mining than other current GPUs on the market? Lets find out and review the Nvidia RTX 2070 for GPU minin... Thank You For Watching! Remember to subscribe and hit the bell "🔔" icon to get notifications as soon as I upload a new video or start a live stream! How to s...

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