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Ethereum Truffle Pet Shop Dapp Running On An Amazon Ec2 Instance

Ethereum Truffle Pet Shop Dapp Running On An Amazon Ec2 Instance

EC2 micro instance. This can be procuredf from your AWS account. Youll need to be able to ssh into the EC2 micro instance. Youll need toinstall Node.js > 6.0.0 to the micro instance. I installed Node.js 6.11.2. You can install Node.js by following these Next, youre going to install TestRPC and Truffle. TestRPC is the test environment that makes it much easier to run your own testnet. We have another blog posts that describes how to create a CustomGenesis.json block for testing here. For this tutorial, save yourself the trouble. Use TestRPC. After you ssh into the micro instance, type the first command below, which will install TestRPC. Next, type the second command, which will install the Truffle development framework into your current directory. Next, were going to pull the completed Pet Shop demo from my Github repo by typing the first command into the ssh terminal. Well then run npm update in the same terminal to update our node_modules. git clone After the npm update is performed, go into the node_modules directory to ensure that the modules are populated. Now, we need to start up the TestRPC Ethereum server. In order to do this, youll want to open another command shell, ssh into the EC2 instance, and run TestRPC. When you run TestRPC, youll want to make note of the available accounts, private keys, and mnemonics. After youve started TestRPC, it should be listening on port 8545. Next, go back to your initial ssh terminal.If youre cheap like me and youre running this on an EC2 micro instance, then youll want to increase your swap space. Otherwise, your TestRPC instance will run out of RAM during compilation of the source code. Youll want to create a 1 GB swap file. In the initial ssh terminal, type the following commands to create a permanent swap file: sudo /bin/dd Continue reading >>

Aws Makes A Range Of Dlt Solutions Available To Users

Aws Makes A Range Of Dlt Solutions Available To Users

AWS makes a range of DLT solutions available to users Colm is editor of The Block, bringing the most important blockchain developments to both businesses and consumers. Amazon Web Services (AWS) has made a number of distributed ledger technology (DLT) solutions available to its users. The partners announced as part of the scheme are Hyperledger Sawtooth, Corda R3, PokitDok, Quorum and Samsung NexLedger. AWS network of users can now use these solutions to build and deploy applications in areas ranging from finance, commerce and supply chain management to healthcare and life services. AWS provides the broadest and deepest capabilities and the largest global infrastructure for building end-to-end blockchain platforms, cost efficiently and at scale. APN Technology and Consulting partners offer a rapidly growing selection of blockchain and distributed ledger solutions with support for multiple protocols. A number of use cases have already been highlighted by AWS. Mobile network operator T-Mobile has built an identity and authentication platform with Sawtooth to accompany its serverless development platform, Jazz. PwC currently utilises a blockchain-based smart contract solution to auto-approve claims and trigger payments, which lessens the need for manual intervention. The solution was built on AWS and uses a range of the companys services. This announcement marks a significant milestone for enterprise-grade blockchain technology, David E. Rutter, CEO of R3, said. Cordas strength comes from its vibrant ecosystem of interoperable applications, and extending the pool of potential developers to the vast network of Amazon Web Services users will spark further innovation amongst businesses building innovative DLT apps for finance and commerce. Despite the interest in DLT, AWS ar Continue reading >>

Ethereum-guides/gpu-cloud_mining.md At Master Angelomilan/ethereum-guides Github

Ethereum-guides/gpu-cloud_mining.md At Master Angelomilan/ethereum-guides Github

Amazon Web Services (AWS) is a cloud computing service provided by Amazon, the well known e-commerce giant. As you can see, the registration process is very handy, since you can sign-in with your existing Amazon account.You may notice that AWS offers the EC2 service free for 750 hrs/month, for 12 months. However, that is for the Linux t2.micro instance. That is good for testing, but not for mining Ethereum. I will tell you later what instance to select to maximize the GPU power. Once you have registered on AWS , you will be presented with a big list of the services offered by Amazon. Click on EC2 (stands for, Elastic Compute Cloud), that will give you GPU horsepower for mining the Ethereum blockchain. ###Step 2 - Setup the pre-built AMI (Amazon Machine Image) on AWS EC2 An Amazon Machine Image (AMI) "provides the information required to launch an instance, which is a virtual server in the cloud". For our purposes, we need to use the following AMI: IMAGE: ami-2cbf3e44 for US-East (Ubuntu Server 14.04 LTS (HVM) CUDA 6.5) STORAGE: Use at least 8 GB, 20+ GB recommended How can we find it? To find a Linux AMI using the Images page: From the navigation bar, select US East (N.Virginia); In the navigation pane, click Images -> AMIs; Switch to Public Images next to the search filter (the default is "Owned by Me" which will be at first empty, since you do not yet own any AMI) Click on the search filter and then (search by) AMI ID -> ami-2cbf3e44 Note: Make always sure you are in the correct region (US East, N.Virginia as we said) otherwise you will not see the AMI we are insterested in on the list. The ami-2cbf3e44, like all the ubuntu 14.04 images, is supported by Ethereum Frontier, but in addition this pre-built AMI has all the NVIDIA GPU drivers, OpenCL, etc... all pre-instal Continue reading >>

Amazon Web Services Not Interested In Blockchain

Amazon Web Services Not Interested In Blockchain

Amazon Web Services Not Interested in Blockchain Amazon Web Services (AWS) CEO Andy Jassy stated that he did not see many use cases for blockchain technology beyond distributed ledgers, adding that AWS does not build technology because we think it is cool. Jassys comment refers to the rise in popularity of blockchain technology, which has not been met by current blockchain uses. The cloud computing giant announced it has no plans to launch blockchain-based technology. Several cryptocurrency foundations have partnered with major players in the industry. Ethereum,the second largest cryptocurrency by market capitalisation, has partnered with Accenture, IGM and Intel. And the IOTA foundation has recently teamed up with Microsoft, Cisco and Volkswagen.AWS might not see blockchain technology applying to their use cases, but Jassys lack of faith in blockchain is a stark contrast from the partnerships mentioned above. Blockchain technologys practical uses are currently limited. New uses are being pioneered, but whether Jassys scepticism proves to be warranted, will depend on what exactly these pioneers manage to create. Continue reading >>

Bitcoin And Ethereum: Make Way For Amazon?

Bitcoin And Ethereum: Make Way For Amazon?

Bitcoin and Ethereum: Make Way for Amazon? The Goliath of online retail now has four cryptocurrency domains registered to its name. It's been more than 15 years since the dot-com boom, when investors were able to throw a dart at their newspaper and seemingly double their money in a matter of weeks. Cryptocurrency returns in 2017 have somewhat brought back that nostalgia , but to an even wilder degree. Since the year began, the aggregate value of all cryptocurrencies has surged from $17.65 billion to as high as $200.9 billion just a few days ago. That's a return in just 10 months and less than a week of 1,038%! Comparably, the broad-based S&P 500 has taken decades to deliver a tenfold return for investors. Leading the way for virtual currencies is bitcoin, whose market cap recently topped $120 billion, which is actually higher than quite a few Dow Jones Industrial Average components. Ethereum, the virtual currency sidekick of sorts to bitcoin, hasn't done too badly, either. It's up about 3,600% since the year began. A mixture of fundamental, emotional, and news-driven catalysts are responsible for pushing bitcoin and Ethereum significantly higher for the year. This includes excitement surrounding the potential for blockchain technology, which is the decentralizeddigital ledger that logs transactions securely without the need for a financial intermediary like a bank. It also has to do with a weaker U.S. dollar, which has sent some investors looking for a store of value to top-performing cryptocurrencies. Beyond the fundamentals lies a sea of news-driven events. Recently, the CME Group ( NASDAQ:CME ) announced that it'd begin carrying bitcoin futures by the end of the year.Institutional access to bitcoin futures trading should improve liquidity and reduce volatility for t Continue reading >>

What Is Ethereum And How Do You Mine It?

What Is Ethereum And How Do You Mine It?

Today we will look at ways of mining Ethereum an open-source blockchain based distributed system for decentralized applications. Although similar to Bitcoin, its different in a number of ways that well discuss here. Lets get started. What is Ethereum and how is it different from Bitcoin? In simple terms, Ethereum is to applications (apps) what Bitcoin is to money. Ethereum provides the platform and infrastructure where programmers can create apps that are governed by smart contracts. They are decentralized in nature with no central server or controlling authority. If you remember our last article , the concept is strikingly similar to Bitcoins. Ethereum is generic in the sense that it can be used to decentralize anything, and Bitcoin is a special case of decentralized currency. Ethereums code is written as a smart contract in specific programming languages. It is then converted to an intermediate form known as bytecode. This is understood and executed by an Ethereum Virtual Machine (EVM). The blockchain nodes store the state of the application as accounts. Every time an app is used, the state changes and the network processes it to calculate the new one and add it to the blockchain. This mathematical puzzle-based processing takes time. The goal of miners is to solve the puzzle and whoever does it first gets the reward which is Ether tokens the currency of the Ethereum world. Why do we need decentralized apps? Well, in most cases we dont, but, to prevent abuse, the Ethereum platform has been specifically designed in a way that it would not be economically feasible to write systems that dont add much value. This is because every line of program execution or storage requires Ether which costs money. For the same reason, Ether is also called the systems Gas. The Ethereum p Continue reading >>

Use Go-ethereum To Setup An Ethereum Blockchain On Aws - Part 1

Use Go-ethereum To Setup An Ethereum Blockchain On Aws - Part 1

Michael Gord | ethereum, blockchain, geth, aws, cloud, private blockchain, development, go-ethereum Use Go-Ethereum to Setup an Ethereum Blockchain on AWS - Part 1 Often in a blockchain development cycle you will need to put your blockchain on the cloud to enable other nodes to attach to it for testing and development, or for other miners to mine for proof of work blockchain. The two most popular cloud providers for a blockchain solution are Amazon Web Services (AWS) and Microsoft Azure. Both have the option to start with a free trial and to only pay based on your usage. This is a three part blockchain development tutorial series on Ethereum that will focus on how to launch your own Ethereum blockchain using Geth on an AWS server, then connect it to another node to start mining or interact with the same smart contracts. This first tutorial will explain how to first configure and connect to your Amazon Virtual Machine. The second section will explain how to install and configure your Ethereum blockchain using Geth on Ubuntu. The third section will walk through how to connect a second node to your cloud instance of Ethereum. We will follow-up with more tutorials that explain how to launch a blockchain instance on other cloud providers such as Azure and Digital Ocean. If you would prefer to learn how to setup a private Ethereum blockchain locally you can check out our Ethereum development tutorial on how to setup an Ethereum blockchain using Geth in your terminal . You can also find other Ethereum blockchain tutorials at mlgblockchain.com/ethereum-tutorials.html. To begin you need to sign-up to AWS console and launch at least two EC2 Ubuntu 16.04 servers. You can launch your two EC2 Ubuntu Servers by going to the AWS website and then in the menu you go to the products tab Continue reading >>

Is Ethereum Gpu Cloud Mining With Aws, Hetzner Or Ovh Profitable?

Is Ethereum Gpu Cloud Mining With Aws, Hetzner Or Ovh Profitable?

Is Ethereum GPU Cloud Mining with AWS, Hetzner or OVH Profitable? Is Ethereum GPU Cloud Mining with AWS, Hetzner or OVH Profitable? Recently I discovered that two cloud hosting providers, Hetzner , based in Germany, and Ikoula , based in France, offer cloud-based GPU plans, as part of their dedicated server offerings. I was curious to see if these plans would be economically worthwhile for Ethereum cloud mining, so I ran some hypothetical projections to test this idea. I was also intrigued to see if these product offerings could be an alternative to the Ethereum cloud mining plans which have popped up online and have received a lot of negative coverage. Many of these contracts do not make economic sense. Lastly, I was interested to see if they could show more potential profit when compared to mining Ethereum with Amazon Web Services (AWS), which is quite unprofitable according to multiple articles that Ive read. Important:to keep the projections really simple, I did not account for Ether price changes or mining difficulty changes. I assumed the conditions today would be static for the next 12 months. This is obviously not realistic! However my goal was to test if the plans make sense given the conditions at the time of publication, so this was enough for an initial quick test. If you are curious about how I chose certain numbers for this test, such as has rates for different GPUs, Ether generated per month, and so on, see the notes at the end of the article. Hetzner is a long established web hosting provider based in Germany. They have a decent reputation, so I was excited to test their new GPU offer. Their GPU plan includes a single GTX1080 GPU, theres an initial setup cost of 99, and the ongoing monthly cost is 99. The setup takes approximately 1 week according to th Continue reading >>

What Is Ethereum? Sfox

What Is Ethereum? Sfox

The advanced #Bitcoin trading platform for advanced #Bitcoin traders. Our algorithms volatility. Backed by @YCombinator. Ethereum is a blockchain-based platform for decentralized applications, or dApps. Whereas Bitcoin was designed primarily as a decentralized digital currency, Ethereum was built with a Turing-complete language for contracts, allowing it to serve as a platform for all types of dApps. In Ethereum, you can write a smart contract to do virtually anything, from executing a token crowdsale to automatically distribute your assets after your death. Its nothing short of a world computer a decentralized virtual machine in the cloud that will execute anyones code in exchange for a fee. The platform design is based on two key differentiating features: Blockchain: Ethereum accounts store contract code and data in addition to keeping a balance. This is referred to rich statefulness, which is basically the ability for Ethereum to remember more and maintain more state at the blockchain level. Turing-complete programming language: As a world computer, Ethereum can run any code that a normal computer could run. People pay gas to miners for computational resources to run their contracts. From the early days of Bitcoin, software developers have seen the power in the underlying blockchain technology and have looked for other areas in which to apply it. Today, Ethereum is the blockchain development platform of choice, hosting hundreds of different decentralized apps or dApps. Apps built on Ethereum are called dApps, short for decentralized applications. Because Ethereum theoretically can power any app that Amazon Web Services could, app ideas have been thrown around enthusiastically, for example from the Ethereum whitepaper , decentralized file storage, decentralized hedge Continue reading >>

How To Mine Bitcoins Using An Aws Ec2 Instance

How To Mine Bitcoins Using An Aws Ec2 Instance

How to mine bitcoins using an AWS EC2 instance With all the talk about the Segwit2x fork (that has now been postponed), I decided to get my feet wet in mining cryptocurrencies. Initially, I chose to mine ether, then Monero coins on Ubuntu 16.04 servers using their accelerated computing instances, but my curiosity got the best of me and I started wondering what it would take to mine actual bitcoins. Every forum and blog I searched advised against even trying. So much so, that I couldnt find any recent tutorials on GPU mining for bitcoin. I took it as an opportunity to create one myself. Note: folks have it correct. Bitcoin mining on the cloud without an ASIC miner does not yield any profit. Still, its a fun experiment. First things, first: sign up for a free account at Amazon Web Services . AWS offers virtual machines, storage, and a host of other services in some cases, for free during your initial 12-month trial. Warning: Account verification can take up to 24 hours. Once your in, navigate to the home page and select EC2. The dashboard gives you access to anything and everything youd ever need concerning launching and maintaining your VM. Including security. Lets deal with that next. On the left-side menu, at the bottom, under the submenu Network & Security, select security groups, then click on the bright blue Create Security group button in the top nav. Give the group a name and a description, and keep the VPC to the default setting. Below that, youll see a tabbed panel asking you to create some access rules for the group. Dont worry about that. Well keep with the default settings here, too. Were mostly concerned with Inbound Rules, so select the Inbound Tab and click Add Rule. For the SSH Rule, youll want to select My IP under source, and the input area will popula Continue reading >>

How To: Run An Ethereum Node Onaws

How To: Run An Ethereum Node Onaws

High volume rewards handling uses an AWS SQS queue to retry any reward that fails Upgraded to Web3J 3.1 to make use of the new status flag from the Byzantium fork of Ethereum (currently in QA) Researching ways to reduce or eliminate Ethereum gas costs including Brave, Raiden, 0x, and IOTA Youve figured out how to run Geth (go-ethereum) to start interacting with the blockchain from your computer, but what happens if you want to run Geth on your server so that all of your clients can connect to it as well? In our case, we wanted all of our Android, iOS, and Web clients to be able to interact with Ethereum without having to run an entire node themselves, and we wanted to leverage the security benefits of running our own node on a cloud service like AWS. This guide will walk you through firing up a Geth node on an AWS EC2 instance from a Mac, and assumes some knowledge of AWS and Ethereum . Make sure you have Homebrew installed, then install AWS Command Line Interface by entering the following in a terminal window. Youll need to create a key pair , security group , and access key before you start. Make sure to download the keypair file that is generated on creation. Before creating the keypair, ensure the region in the upper right corner matches the region you specify in the configure step below. Weve selected Ohio (us-east-1) to keep costs down. Weve selected json as the default output format, but you can output in whatever format fits your project best. AWS Access Key ID [None]: AWS Secret Access Key [None]: For more information, consult the AWS Documentation . Now, lets create the EC2 instance where our node will run. Well use the most recent stable Ubuntu AMI with hardware virtualization and SSD volumes for performance. The Continue reading >>

Two-node Setup Of A Private Ethereum On Aws With Contract Deployment (part 1)

Two-node Setup Of A Private Ethereum On Aws With Contract Deployment (part 1)

From time to time I plan to emulate an Ethereum environment. The idea behind is to observe how Ethereum nodes work to each other, and how different accounts interact in transaction and contract deployment. For testing, most contract deployment example nowadays is mainly on testrpc or testnet, but how the contract works among nodes is still new to me. I deploy this two-node setup on AWS. As I do not use any special features on AWS, it should be applicable to another cloud environment. My setup is inspired by the work from JJs World ( link ), and after testing this for several times with modification, I document the whole process I have done, and share some experience here about the whole process. I also use the Voting contract developed by Mahesh Murthy ( link ). This is a simple contract that best illustrates how a contract works in the chain. This by no means is a detailed step-by-step guide. I omit certain steps and make reference to some work done by others. For example, the detailed operation of AWS EC2, including launching a new instance with a setup like access key, security group, etc. can be found here ( link ). Part 1: Create a 2-node Ethereum network with private blockchain, and accounts on the two nodes can send ether to each other. Part 2: Deploy a contract from one node, and both accounts can access and execute functions on this contract. Use t2.medium (2 vCPU, 4 GB RAM) with default 8G SSD. Pick Ubuntu OS. Make sure that the two nodes are with the same security group, which allows TCP 30303 (or 30000-30999 as I may use more ports on this range). Port 30303 by default is for peering among nodes. I first tried t2.micro as it is the free-tier offer. However, mining was not successful (DAG loop without ether reward). I next tried t2.small and mining worked. H Continue reading >>

Can I Maintain My Ethereum Wallet On Aws?

Can I Maintain My Ethereum Wallet On Aws?

Can I maintain my ethereum wallet on AWS? Can you explain the process that you were thinking of using? Storing the downloaded block-chain, or the JSON file that includes the encrypted private key? xgabrielx Jul 12 '17 at 9:20 @xgabrielx to store the blockchain for syncing my wallet Jash Jacob Jul 12 '17 at 10:07 I don't see the point of doing it, but you don't need to consider security since "the blockchain" is public. xgabrielx Jul 12 '17 at 10:44 It depends how much you trust them to keep your keys safe. People will give you their opinion as to how safe they think AWS is, but at the end of the day you need to be comfortable in your understanding of what you think your threat model is in using their services. It doesn't directly answer your question, but a few further things you'd need to consider as well as security: You'll be downloading a lot of data and potentially using a fair amount of bandwidth to keep you wallet up to date. Their SLA (Service Level Agreement) doesn't explicitly guarantee uptime. You can hunt around the internet for ideas of what their uptime actually is in practice, but from what I've seen in the past it's not quite " 5 9s ". If you want guaranteed access to your wallet at all times, you'll need to ensure you've taken a back-up of your keys, and are aware of how to use other wallet services. If you accidentally delete your instances (including your keystore, etc.), and want to recover the data, then you might struggle. Amazon don't publish their data retention policies (which are different to the user-configured back-up retention policies). Their security whitepaper would be worth a read. Of course, the second and third points are mitigated by taking back-ups of your keys. Continue reading >>

Ethereum Is Coding's New Wild West

Ethereum Is Coding's New Wild West

Pelle Braendgaard has the textbook bio of an old-guard programmer. At 12, he often went to his local computer store in Denmark to write BASIC code on an eight-bit Sinclair ZX Spectrum. In 1993, he stumbled across Mosaic, the first graphical web browser, while aimlessly cruising the UNIX command line on a university computer. He quickly fell in love with the web, and found a job as the webmaster for AltaVista, a pioneering search engine. In the very early days, you really had to figure it all out yourself, Braendgaard says, in an accent that floats between Danish and American. All of us who were developing back then, we had to learn everything...there werent good libraries. There werent good developer tools. Gabe Nicholas is a graduate student at the UC Berkeley School of Information focusing on the intersection of technology and society. Sign up to get Backchannel's weekly newsletter. The web has matured since then, but Braendgaard has moved on. Today, hes writing distributed applications, or DApps, for Ethereum a cryptography-based technology thats as green a field as the 1990s web once was, offering the same tingle of novelty and a similar chance to make an impact. If people know Ethereum at all, it is as Bitcoins hip, experimental cousin. If they know one thing about it, it is that the price of Ether, the coin underlying Ethereum, has skyrocketed by a factor of 20 over the last six months. But the ensuing get-rich-quick mania has led many to overlook Ethereums more lasting significance. More than a new type of digital currency, it is a new type of distributed computerone that no one controls but inside which anyone can see. On this computer, a new generation of applications, called DApps, is being born. How can Ethereum be a cryptocurrency and a computer at the same Continue reading >>

Ethereum Cloud Mining

Ethereum Cloud Mining

Cloud Mining is a process of crypto currency mining conducted without the direct use of mining equipment or hardware. The service typically offers up the shared processing power of a remote datacenter , that has already been prepared and setup with complex mining equipment. Caution is advised beforehand due to varying usage fees among different providers. Likewise, hashing power is generally procured over a long term period, and certain companies/websites prefer to avoid dealing with a broader client base. Considering that ethereum cloud mining is a service created from an almost purely business standpoint, there is understandably, a cost associated with its appliance. Lower returns are expected because of the involvement of a third party. However, for standalone mining, a more comprehensive mining rig and configuration is needed, and this calls for a substantial upfront financial expenditure. There are several advantages and failings, when it comes to opting for an ether cloud mining contract over an independently run mining operation. If a quieter and exceptionally cooler home and/or work place is paramount, then purchasing components/equipment that usually requires elaborate cooling and ventilation systems, can prove a deciding factor. The noise can prove excruciating over time, especially you are mining close to a place of work. Electronic dust is a problem too, for breathing as well as for the wear and tear of other appliances/parts. This is something that most first-time investors seem to neglect. Even when dual mining with just a cpu or gpu, you are in fact directly and indirectly depleting other components as well. The same is true for non-computer based mining as well; everything that is in use has to have an amortization period, and should be factored in as a Continue reading >>

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