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Ethereum Swarm Example

Ethereums Scalability Plans To Push Past Theirlimits

Ethereums Scalability Plans To Push Past Theirlimits

Ethereums scalability plans to push past theirlimits The announcement by Vitalik Buterin on November 2 at Devcon3 regarding his modest proposal for Ethereums future was timely and exciting. Ethereum, being a blockchain, has been enduring a problem common to all blockchains the size of the database underlying the blockchain grows without bounds, and in direct proportion to the number of people using the blockchain. What this translates to is major overhead and challenges that are getting worse over time for the underlying infrastructure needed to run Ethereum. For example, the Ethereum database has grown over the last few years from being under a gigabyte to tens of gigabytes today and it appears to be growing on an exponential trajectory. This is clearly not sustainable. The key technology Vitalik believes is the solution is sharding, a term borrowed from database technology, where the data is sharded and the network is partitioned. Briefly, sharding consists of three steps: Break up the data into small chunks (also called shards) Partition the network into subnetworks (Bluzelle calls each a swarm. Vitalik calls each a universe) While there are many aspects to Vitaliks announcement, this particular one is interesting, because, if properly executed, it will enable Ethereum to scale well past the size limits it is facing now. The execution specifics of how the subnetworks will intercommunicate remains a subject that undoubtably Vitalik is actively working on. The Bluzelle database was architected from the get-go to employ three key technologies, one of which is database sharding. Bluzelle accomplishes massive scalability by sharding all database data and then ensuring shards get properly stored into Bluzelles own flavour of network partitions swarms. A Bluzelle swarm is Continue reading >>

Github - Ethereum/swarm-dapps: Swarm App Examples

Github - Ethereum/swarm-dapps: Swarm App Examples

If nothing happens, download GitHub Desktop and try again. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. In this repository, you find the source code for distributed applications (so-called apps),the primary purpose of which is to demonstrate the use of Swarm's API and the most usefulpatterns of developing such applications. A photo album dapp with a set of public-domain photographs that lets users upload their own photos. The code is based on fgallery version 1.7. All chenges in the gallery are accompanied by a change in the root hash of the album. Sharing or registering the root hash corresponds to sharing and/or publishing a particular state of the photo album. This is an example of non-interactive content dissemination, with no feedback from the audience. This is a GUI explorer for file collections hosted on swarm. An example of a tool for working on file collections other than itself. The root hash of the explorer remains the same (or changes with upgrades); the root hash of the explored collection is appended as a fragment to the URI. Of course, it can be used to explore itself. Continue reading >>

Introducing Perigord: Golang Tools For Ethereum Dapp Development

Introducing Perigord: Golang Tools For Ethereum Dapp Development

Introducing Perigord: Golang Tools for Ethereum DApp Development Truffle , but with standalone Go binaries instead of Node.js Hey there! Were building PolySwarm the first decentralized threat intelligence market. PolySwarm is made possible by blockchain-based smart contracts that enable new forms of market design. Read more about why were building PolySwarm , or take a deep dive into the full details in our white paper . PolySwarm is fortunate to be advised by world-renowned information security experts . Figure A: The least-gross image of a Perigord truffle on Shutterstock Do you like what Truffle has to offer but dont particularly enjoy a Node.js development environment? Us too! Theres literally dozens of us! Today were introducing Perigord: a Truffle-like framework for developing Ethereum DApps in Go that should make these instructions a little less painful. The impatient can grab the source code here . Follow Perigords install instructions and make sure you have a working perigord install: A golang development environment for Ethereum A sample contract (contract/Foo.sol) is provided. This contract does nothing other than return 1337. This behavior is tested in tests/Foo.go. See Truffles documentation for discussion on the migrations folder and Migrations.sol. The bindings directory is empty until we perigord build our Solidity contracts and use their ABI to produce Go bindings. Lets do that now. perigord uses solc to compile Solidity contracts into EVM bytecode and ABI specifications and then uses abigen to generate Go bindings based on these ABIs. This caused Perigord to call out to solc and compile our contracts (Foo.sol & Migrations.sol) into Ethereum EVM bytecode and an ABI specification (in JSON): Next, Perigord fed the ABI into abigen to produce.go files that Continue reading >>

Special Tuesday: Swarm City, Real Life Example Of The Features Ethereum Promises

Special Tuesday: Swarm City, Real Life Example Of The Features Ethereum Promises

Swiss Legal tech Conference & Hackathon This special Tuesday event presents Swarm City in GG6 (by Bossard Arena). Please note we have a limit on the headcount on 130 so sign up in time, but also please remember to sign off in case you change your mind or cannot make it, so potentially waitlisted people get in. Swarm City will generously sponsor the drinks. You have to sign up on the meetup platform, here: We will describe what Swarm City is and how it interacts with the Ethereum Platform and specifically how IPFS and Whisper are being utilized. Michael combines creativity and coding while thinking out of the box. Age 20, he started a digital media production company that was sold 4 years later to Duval Guilaume / Publicis. He joined Publicis working as creative director for the digital department. He then started McCann Ericksons Digital department, creating digital marketing concepts for different clients. He is also a serial founder of very successful digital marketing startups before he started to work for the city of Antwerp and joined A-Labs, a research and development program, focusing on the economic and social impact of new technologies, such as Blockchain. His creative mindset is extremely helpful in developing new opportunities with Blockchain Technology as the focus is not to replicate existing processes with new technology but to create new processes because of improved technology. Stefaan is a true tech entrepreneur and Blockchain expert. His smart contract coding ability in solidity is well recognized in the Ethereum community. He has been developing software in several positions for more than 15 years. His involvement also included working as Freelancer for the City of Antwerp, working on the bridge between the Internet of Things and Blockchain Technolog Continue reading >>

Blockchain Infrastructure Landscape: A First Principles Framing

Blockchain Infrastructure Landscape: A First Principles Framing

Blockchain Infrastructure Landscape: A First Principles Framing Manifesting Storage, Computation, and Communications How are Ethereum, IPFS/Filecoin, and BigchainDB complementary? What about Golem, Polkadot, or Interledger? I often get questions like this. So, I decided to write about how I answer those questions, via a first-principles framing. The quick answer: theres no one magic system called blockchain that magically does everything. Rather, there are really good building blocks of computing that can be used together to create effective decentralized applications. Ethereum can play a role, BigchainDB can play a role, and many more as well. Lets explore The elements of computing are storage, compute, and communications. Mainframes, PCs, mobile, and cloud all manifest these elements in their own unique ways. Specialized building blocks emerge to reconcile tradeoffs within a given element. For example, in the storage element we have both file systems and databases, where file systems are for storing blobs like mp3s with a hierarchy of directories and files, and databases are for storing structured metadata with a query interface like SQL [1]. In the centralized cloud, we might use Amazon S3 for blob storage, MongoDB Atlas for databases, and Amazon EC2 for processing. This article focuses on the blockchain landscape: the blocks for each element of computing, and some examples of systems manifesting each block. For each block, I will focus on being illustrative over thorough. Here is each element of computing, with related decentralized building blocks: Storage: token storage, database, file system / blobs Processing: stateful business logic, stateless business logic, high performance compute Communications: connect networks of data, of value, and of state Blockchain t Continue reading >>

Introduction Swarm 0.2rc5 Documentation

Introduction Swarm 0.2rc5 Documentation

immutable, unforgeable, verifiable yet plausibly deniable storage no single point of failure, fault and attack resilience censorship resistance, universally accessible permanent public record efficient market driven pricing. tradeable trade off of memory, persistent storage, bandwidth efficient use of the blockchain by the swarm accounting protocol deposit-challenge based guaranteed storage [planned for POC 0.4 by Q2 2018] Swarm client is part of the Ethereum stack, the reference implementation is written in golang and found under the go-ethereum repository. Currently at POC (proof of concept) version 0.2 is running on all nodes. Swarm defines the bzz subprotocol running on the ethereum devp2p network. The bzz subprotocol is in flux, thespecification of the wire protocol is considered stable only with POC 0.4 expected in Q2 2018. The swarm of Swarm is the collection of nodes of the devp2p network each of which run the bzz protocol on the same network id. Swarm nodes are also connected to an ethereum blockchain.Nodes running the same network id are supposed to connect to the same blockchain.Such a swarm network is identified by its network id which is an arbitrary integer. Swarm allows for upload and disappear which means that any node can just upload content to the swarm andthen is allowed to go offline. As long as nodes do not drop out or become unavailable, the content will stillbe accessible due to the synchronization procedure in which nodes continuously pass along available data between each other. Uploaded content is not guaranteed to persist until storage insurance is implemented (expected in POC 0.4 by Q2 2018). All participating nodes should consider voluntary service with no formal obligation whatsoever and should be expected to delete content at their will. Continue reading >>

Building Dapps On Ethereum Part 4: Decentralised Hosting Using Swarm

Building Dapps On Ethereum Part 4: Decentralised Hosting Using Swarm

Throughout this blog post series we will use sample code from the Iron Doers project which is a quite simple concept briefly described in a practical example of using blockchains and the projects whitepaper . As we have decentralised the computational aspects of our application with smart contracts on the blockchain, it makes perfect sense to decentralise the actual hosting of the HTML and JS parts of our dapp as well. Because why should you trust a single host to serve your dapp? That single host will then get the ability to track all users of your dapp. Further, decentralised hosting provide some other practical benefits like resistant to DDoS attacks and censorship while maintaining zero-downtime. Remember that AWS S3 outage that took out half the Internet? Or the DDoS attack against Wikileaks when publishing information about certain US presidential candidates? These are the kinds of events that would not have happened, should the content have been published in a decentralised way. First of all, at the time of writing Swarm is still in proof-of-concept mode and should not be considered ready for production use. Swarm is a new content distribution protocol that you access via bzz:/. Its not that different from except that the content is not served from one central place. Whats unique with Swarm (compared to Bittorrent or IPFS ) is that you can upload and disappear because peers will be incentivized to distribute your content by earning Ether (although as of writing this part is not yet fully developed for Swarm). One temporary problem with Swarm is that regular web browsers dont yet understand the bzz protocol. This is why Swarm comes with a HTTP gateway. A Swarm gateway is a HTTP server that can serve any content from the Swarm platform. For example, the Swar Continue reading >>

Bitcoin Hack History - Ethereum Wallet Hard Drive, Bitcoin Gold Btg Chart, Litecoin Lightning

Bitcoin Hack History - Ethereum Wallet Hard Drive, Bitcoin Gold Btg Chart, Litecoin Lightning

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Dapps Ethereum Homestead 0.1 Documentation

Dapps Ethereum Homestead 0.1 Documentation

Swarm is a distributed storage platform and content distribution service, a native base layer service of the Ethereum web 3 stack. The primary objective of Swarm is to provide a sufficiently decentralized and redundant store of Ethereums public record, in particular to store and distribute dapp code and data as well as block chain data. From an economic point of view, it allows participants to efficiently pool their storage and bandwidth resources in order to provide the aforementioned services to all participants. From the end users perspective, Swarm is not that different from WWW, except that uploads are not to a specific server. The objective is to peer-to-peer storage and serving solution that is DDOS-resistant, zero-downtime, fault-tolerant and censorship-resistant as well as self-sustaining due to a built-in incentive system which uses peer to peer accounting and allows trading resources for payment. Swarm is designed to deeply integrate with the devp2p multiprotocol network layer of Ethereum as well as with the Ethereum blockchain for domain name resolution, service payments and content availability insurance. Continue reading >>

Ethereum Overview | Truffle Suite

Ethereum Overview | Truffle Suite

You may have heard the terms "blockchain" and "smart contract" floating around, but what do they actually mean? In this tutorial, we'll demystify the jargon, show you practical blockchain solutions, and give you direction on how to create an application that takes advantage of the blockchain. Blockchains are used when multiple parties, perhaps located across the world, need to share data and transfer value without trusting each other. The financial world describes this trust as the counterparty risk: the risk that the other party won't hold up their end of the bargain. Blockchains completely remove the counterparty risk through a revolutionary system of mathematics, cryptography, and peer-to-peer networking. Before we go into those details, let's first look at some history and how the need for blockchains arose. In the 1960's the first computerized databases emerged. With hardware occupying multiple rooms and the Internet decades away, data naturally existed in central, physical locations. This is a centralized approach, meaning the location and accessing of data is controlled by a central authority. Centralized systems can be manipulated, from inside or outside, so we have to trust the owners of these systems to have sufficient will and resources to keep their data secure and with integrity. Centralized databases are still the most common today, powering most of our online and offline applications. A self-hosted blog is a common example of a centralized database. The owner could potentially edit posts in hindsight or censor users without recourse. Alternately, a hacker could infiltrate the server and commit malicious acts. If there is no database backup, reversing the damage might be impossible. Graphically represented, each arrow crossing a boundary of the main serve Continue reading >>

Ethereum Storage Network Swarm Enters Next Test Phase - Coindesk

Ethereum Storage Network Swarm Enters Next Test Phase - Coindesk

Ethereum Storage Network Swarm Enters Next Test Phase Swarm, the decentralized storage branch of the ethereum network, will be launching its third proof-of-concept soon. In an interview with CoinDesk, swarm lead developer Viktor Tron said the proof-of-concept will be launching after ethereum's flagship developer conference Devcon3, going on now. Tron emphasizedhow this work fits into the wider vision for ethereum, since the proof-of-concept will be fullycompatible with the Geth client and the Whisper messaging protocol, bringing ethereum one step closer to its "holy trinity" vision , where three systems provide a complete alternative to the World Wide Web. This third proof-of-concept gets swarm closer to the ethereum mainnet, which is expected for the spring or summer of 2018 with the launch of a fourth proof-of-concept. Currently, the swarm team is completely rewritingthe network layer, synchronization and retrievability, and connectivity layer and chunk synchronization, according to Tron. Swarm should functionmuch like Dropbox providing the ability for platform users to store content and create and share folders within this proof-of-concept, although the platform will be resistant to censorship. "If you operate it on Swarm, there's no way for a jurisdiction to take that down because it's this obfuscation method. Nodes can plausibly deny that they have the content. This is a very important feature because it's censorship-resistant basically." According to Tron, Swarm could pave the way for many "beautiful things," such as distributed public archives that cannot be shut down or censored. The proof-of-concept will also be stress tested through a network simulation framework thatcanmimicemergentbehavior, Tron said. This is an effort to prepare for scalability, a hot topi Continue reading >>

Storage - What Is Swarm And What Is It Used For? - Ethereum Stack Exchange

Storage - What Is Swarm And What Is It Used For? - Ethereum Stack Exchange

Both Swarm and Whisper are complementary technologies contributing to the vision of Ethereum as a "world computer". When imagining Ethereum as a metaphor for a shared computer, it should be noted that computation alone is not enough. For a computer to be fully useful, it also needs storage to "remember" things and bandwidth to "communicate" them. This could be summarised as such: More specifically, Swarm is being designed as an accounting protocol that benefits from the automatic execution of so-called "smart contracts" running on the Ethereum Virtual Machine (EVM). This accounting protocol is independent of the physical storage mechanism. That is, it is not intrinsically tied to a specific storage system. It could be IPFS , BitTorrent , or some future technology not yet invented. It is not entirely clear where Swarm and Whisper fit into the development roadmap and when or if they will be delivered by the same developers that developed the EVM, however it is part of the vision of a fully decentralized web . UPDATE: swarm landing page via swarm public gateway 5 as pf 12 May 2016 Continue reading >>

Ethereum/swarm - Gitter

Ethereum/swarm - Gitter

user guide: - dev guide: regarding insurance paid to keep host nodes from deleting files that are not regularly accessed; if I have my clients encrypted personal/legal records hosted on swarm, records that may not need to be accessed for years to come; what is the financial framework to keep approx 10 megabytes of data from deletion? @scottrepreneur the thing is that that it hard to predict because its a dynamic market. Supply and demand is supposed to determine how much storage costs in this sense. Also SWINDLE (the insurance scheme) is not yet implemented. What is the simplest front end implementation of a swarm file upload and a ethereum call of the swarm hash? The easiest example will be designed for a technically unsophisticated user. The user/uploader will have a jpg (or similar image file) stored on their phone or laptop/desktop and they want it to be stored on swarm, with the hash then subsequently registered on the ethereum blockchain. The uploader needs to upload the image file and then review an immediate ethereum call that can be saved by the uploader for future reference. The call must have the swarm hash, swarm timestamp and any smart contact information executed in the subsequent/simultaneously executed .sol file. This needs to be perceived by the user as a single process for ease of use and implementation. I need something that can be served up device and os agnostic. Could it just a simple website served in web3 enabled browser running Mist with swarm integration? It's best if it also is prepared to accommodate the built in encryption referenced earlier in this feed. Swarm/Mist with integrated encryption. Each call or swarm upload with be resolved with a thisfileupload.eth pointing to the swarm upload protocol and a thiscall.eth .sol contract. i know @ Continue reading >>

How To Launch Swarm For Dapptesting

How To Launch Swarm For Dapptesting

Software Developer, writer, crypto-enthusiast + polymath. Building for artists @blaq_box. Recently, Ive been getting my feet wet with developing decentralized applications (dapps) using emerging tools I think everyone should try out. Ethers a little bit different from predecessor cryptocurrencies Bitcoin because it comes with its own platform for developers, called Ethereum , comprised of: a decentralized virtual machine that runs smart contracts for the global base blockchain a peer to peer, multi-protocol IDE developer tools to build dapps that administer custom tokens, manage accounts and transactions, and execute immutable contracts that take banking, commerce, fundraising, and democracy to a whole new level Ethereum empowers and incentivizes folks, like you and me, to share knowledge, create equity and build wealth, all at the same time; a secure, coset-effective solution for developing with purpose while helping your end users to get paid. OOP skills still have value because the high-level contract-oriented languages used to program contract logic closely resemble popular languages (JavaScript, Python, Go); Solidity being the most common because it looks so much like JS. Contracts backend applications that operate autonomously, unbiasedly, and indefinitely unless programmed to destruct after a set time facilitate transactions to and from end users, and do so while mitigating the risk of fraud, censorship, or third-party interference. Naturally, over the past couple of years, Ethereum has developed to include an emerging ecosystem of web 3.0 companion technologies a Wallet, its own browser Mist, the Whisper package for messaging dapps and, most recently, a decentralized data storage called Swarm to push the vision of the serverless computer forward, expand use cas Continue reading >>

Ethereum-backed Micropayments Could Help Us Live Without Facebook And Google Spying

Ethereum-backed Micropayments Could Help Us Live Without Facebook And Google Spying

Ethereum-Backed Micropayments Could Help Us Live Without Facebook and Google Spying Dr. Aron Fischer of Swarm and Colony explains how Ethereum-backed micropayments will free us from the control of Facebook and Google. Dr. Aron Fischer of Swarm and Colony explains how Ethereum-backed micropayments will free us from the control of Facebook and Google. He also talks about the implications of Ethereum on society in an interview shot at the Devcon 2 conference last September. Several new projects are being developed on the Ethereum platform. They have the potential to reach the mass market sooner than most users could ever imagine. The reason we ended up where we are today is because of a lack of micropayments. The reason that companies like Google and Facebook spend so much time spying on us and trying to get as much information about us as possible is because that is the only thing that they can make money from. Thats become the product but if I can write articles and everyone who reads my articles pays me a fraction of a cent then I no longer have to worry about who they are and try to harvest the data repackaging it in some way that I can sell it to advertisers because that means sort of disappears. He explains that one of the few things that motivate him is the phrase Internet without servers because in the beginning of the creation of the Internet it was once called cyberspace as it was completely disjointed from the real world. It made everyone on an equal playing field as there is no difference between someone in Hungary, in the United States or in India. Its just like oh another person is somewhere online. Then from the early 2000s until now, more and more of these services got closed off. We have all these walled gardens- Facebook, WeChat and so on. Everything is Continue reading >>

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