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Ethereum reference links

December 18, 2016
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Here is a neat site with lots of Ethereum related links: http://cryptocentral.info/topic/11/ethereum-eth-pow-pos-ethash Replicated here in case that link breaks. Website: https://www.ethereum.org/ http://wiki.ethdev.com Documentation: https://www.cryptocompare.com/mining/guides/how-to… https://github.com/ethereum/go-ethereum/wiki/Minin… https://ethereum.gitbooks.io/frontier-guide/conten… https://github.com/ethereum/wiki/wiki https://blog.ethereum.org Stats: https://stats.ethdev.com/ https://eth-status.org/ Forums: https://forum.ethereum.org/ https://www.reddit.com/r/ethereum Developers: http://ethdev.com/ Wallets: https://github.com/ethereum/mist/releases/download… Online wallet: https://ethereumwallet.com/ The following full-node implementations of Ethereum are available: Geth, written in Go Eth, written in C++ Ethereum J, written in Java pyethapp, written in Python ethereumjs, written in JavaScript ethereumH, written in Haskell Ethereum Blockchain As a Service On Azure: https://azure.microsoft.com/en-in/blog/ethereum-bl… Block Explorer: https://live.ether.camp/ https://etherscan.io/ https://www.etherchain.org/ http://ether.fund/explorer https://explorer.etherapps.info/ https://tradeblock.com/ethereum/ https://github.com/etherparty/explorer (Git Source) https://ethereumblocks.info/ Exchanges: https://poloniex.com/exchange/btc_eth https://www.gatecoin.com/public/markets https://www.kraken.com/ https://www.cryptsy.com/markets/view/ETH_BTC https://bittrex.com/Market/Index?MarketName=BTC-ET… https://hitbtc.com/ https://bleutrade.com/exchange/ETH/BTC https://coinsquare.io/ https://metaexchange.info/markets/ETH/BTC https://alcurex.org/index.php/crypto/index https://yunbi.com/markets/ethcny https://www.cryptocompare.com/coins/eth/markets/BT… Tools: http://ether.fund/tool/contract http://ether.fund/tool/etherface http://ether.fund/tool/terminal http://ether.fund/peers http://ether.fund/tool/converter http://ether.fund/tool/calculator http://ether.fund/tool/gas-fees http://ether.fund/tool/gas-price http://ether.fund/tool/blockcast Contracts: http://ether.fund/contracts/ Cloud Mining: http://www.ethercloud.info/ Mining Pools: http://ethereumpool.co/ http://eth.nanopool.org/ https://eth.suprnova.cc/ http://ethpool.org/ https://eurohash.net/#/ http://www.talkether.org/ https://www2.coinmine.pl/eth/index.php?page=statistics&action=blocks https://eth.pp.ua/stats/ Social: https://twitter.com/ethereumproject https://plus.google.com/+EthereumOrgOfficial https://www.facebook.com/ethereumproject/ IRC Chat: bitly.com/irc_ethereum #ethereum: for general discussion #ethereum-dev: for development specific questions and discussions ##ethereum: for offtopic and banter #ethereum-mining: for mining only conversations #ethereum-markets: for discussions about markets
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That’s a wrap for Blockchain Wellington 2016

December 15, 2016
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2016 has been the year of the great rekindle of the bitcoin and blockchain community in Wellington. The year started off on February 10th at the Brewery Bar lead by Dave Moskovitz. It then went quiet for a while and was kicked back into life with a meet up in September hosted by API Talent. We’ve been building momentum ever since thanks to 3 Months and Bizdojo/Collider and ended last evening with a talk on Ethereum mining, a demo of an Ethereum app and an update from Mark from 3 months on some of the exciting events in the pipeline for 2017, so stay tuned. Last night Felix gave a great Ethereum demo called EthBay where he sold a laptop and showed how it worked under the covers. IPFS is also an exciting technology that Felix covered also. I shared my experience on how I built an Ethereum miner to learn about blockchains and made a whopping negative $0.20 per day in the process. As mentioned, we’ve got some exciting things planned for 2017 so stay tuned!
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When was Mist introduced?

December 14, 2016
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Mist was introduced on July 9th 2016. It was labelled not as version 1.0 or 0.1 but as 0.8. This is because it continued using the version number of the Ethereum Wallet. https://github.com/ethereum/mist/releases/tag/0.8.0 links to the release and also explains the thinking behind the Mist/browser concept. You can think of Mist as the browser for decentralized apps. Like what Firefox or Google Chrome are for the Web 2.0, the Mist Browser will be for the Web 3.0. What is interesting is that in November 17 2015 in v0.3.6 there was a secret open source release of Mist (https://github.com/ethereum/mist/releases/tag/0.3.6) that essentially served as an early access programme.
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Introduction to Bitcoin by Andreas Antonopoulos

December 12, 2016
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Presented at the Singularity University’s Innovation Partnership Program, this talk by Andreas is an entry level talk about bitcoin. It’s 24 minutes long and is a great watch. Lots of analogies and parallels drawn. Worth a watch.    
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Another fantastic and passionate talk by Andreas Antonopoulos

December 7, 2016
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  Andreas Antonopoulos – Currency Wars and Bitcoin Neutrality. This is worth an hour of your time. Some highlights: 4:30: India withdraw 500 and 1000 rupee notes. 28:00: End of talk. Q&A 34:25: Memorise 12 word seeds and just walk across the border + setting up a bitcoin wallet is not that hard compared to what people in Venezuela have to go through. 54:00: How much should you invest in bitcoins? 57:30: Will bitcoin be banned in China?    
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Next Wellington Blockchain Meetup: 15th December 2016

December 5, 2016
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The next Wellington Blockchain meet up will be on 15th December at 5:30pm at Bizdojo. The last one of the year! On the agenda… How to build an Ethereum miner and how it helps in learning blockchains technologies. Distributed Applications (Dapps) development in Ethereum. The latest developments at www.blockchainlabs.nz Come on down and join us in learning about this disruptive technology that is going to be big! Blockchain Mining & Dapp Development Thursday, Dec 15, 2016, 5:30 PM Bizdojo115 Tory Street Wellington, NZ 25 Members Went Hello fellow Blockchain Enthusiasts! We will be having another meetup on the 15th of December.  We will be discussing a few topics including:Learning blockchains via miningSean shares his experience on setting up an Ethereum miner, how it works, and how it helps in learning the fundamentals of Ethereum and Blockchain in general.Here’s some b… Check out this Meetup →
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Wellington Blockchain November Meet Up Summary

November 10, 2016
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It was another good meet up in Wellington yesterday evening with a few more new faces which was great to see. The evening started with a presentation from myself on “Blockchain Consensus with Proof of Stake” and then with Brett Holland from Creative HQ talking about the KiwiBank Fintech Accelerator The most interesting part was perhaps the questions at the end of each presentation where the audience members could get involved and share their experiences and insight. I talked about what proof of stake is, how it works and it’s relation to Ethereum. Here is a link to the slide deck here. Checkout the video below. Brett gave an insight into the KiwiBank Fintech programme and how it works. Mark posed an interesting question on the oxymoron of blockchain technology disrupting the financial industry but then having KiwiBank as one of the main sponsors. We are looking for speakers for a 5-10 minute slot so if you have something you want to share, please contact the organisers of the meet up. The next meet up will be in December with dates published soon.
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Blockchain Revolution: Don Tapscott & Alex Tapscott

November 4, 2016
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A very futuristic book with some really futuristic concepts. Great research and collection of stories and insights from many in the industry. Having been in this industry for just under 3 years I’m familiar with many of the concepts but when I talk about these concepts with those around me, I always get a blank stare. With my background in electrical engineering, software, hardware, electrical wiring skills, previous experience in working at an energy metering company and an interest in renewable energy, and combining this with blockchain technologies and micro payments, I thought about selling excess solar energy to my neighbour via the blockchain. What a cool and unique idea I thought! Then I read this book and the concept was already outlined there. Oh well. On a positive note, it at least validates it as a distinct possibility. The only thing to note about the book is that although all the ideas and concepts are amazing, it’s going to take time because this stuff is not easy. My selling excess energy to my neighbour idea is probably a 12 month project just for a small proof of concept. All going well, commercial reality is probably 5 years away. All in all […]
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POS: Prove Your Steak on the Blockchain

October 28, 2016
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Introduction The first thing that came to mind when I saw “PoS” was Point of Sale. EFTPOS is very popular in New Zealand and Australia but this has nothing to do with collecting payment. It also has nothing to do with proving how much steak you can eat. That would be interesting though! PoS stands for Proof of Stake and is one way to achieve consensus on the blockchain. Other ways to achieve consensus on the blockchain include (but not limited to): Proof of Work Proof of Activity Proof of Capacity Proof of Storage Proof of Work (PoW) is currently the most common and is being used on the bitcoin blockchain. To understand more about PoW read this. Proof of Stake (PoS) has made some noise in recent times in particular with Ethereum looking at moving away from PoW to PoS. Before we look at PoS, first let’s see why we need it. Consensus In a distributed, trustless computing network, there needs to be a way for a collection of machines to come to an agreement of facts. In a blockchain, any participating node on the network can create a candidate block very easily by obtaining the relevant software and verifying the transactions […]
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Next Wellington Blockchain meet up announced

October 24, 2016
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The next Wellington Blockchain meet up will be on 9th November at 5:30pm at Bizdojo. This is the first meet up after the merge between the Wellington Bitcoin and Ethereum NZ meet up. If you are curious and what to learn more, have questions that you want answered or want to meet with others in this industry then come along. Everyone is welcome.     We have 2 presentations: Proof of Work v Proof of Stake. Understanding the 2 consensus algorithms in the blockchain Overview of Kiwi Fintech Accelerator There will also be time to meet other enthusiast who have similar interests around bitcoins, blockchains and smart contracts. If you are doing something interesting with bitcoins, blockchains or smart contracts, give us a shout. We’d love for you to share it with the community as well. Blockchain Meetup Wednesday, Nov 9, 2016, 5:30 PM Location details are available to members only. 43 Members Went Hey guys,Let’s get together to chat about bitcoins, blockchains and smart contracts. It doesn’t matter what your background is. If you are curious and what to learn more, have questions that you want answered or want to meet with others in this industry then come along. All […]
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Sydney Bitcoin ATM Machine

October 21, 2016
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On my recent trip to Sydney, I went back to visit the only bitcoin ATM machine that allows you to withdraw cash. Unfortunately it has been removed. I was there in August 2015 and documented the interesting process. Bitcoin ATM machines are not that scary I’ve contacted Patrick from Abatech but with no success. They have recently updated their website (http://abatech.com.au) promoting their mobile wallet instead of their ATM machines. They did have 1 in Melbourne and Brisbane but who knows if they are operational as well. It was the right step in the right direction but maybe it wasn’t making as much money for the owners. It is probably ahead of its time as well.
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The Creature from Jekyll Island : A Second Look at the Federal Reserve

October 15, 2016
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The study of crypto-currencies and blockchain technologies has led me on a path that I would have never travelled on otherwise. Never in a million years would I have thought to read this book. The Creature from Jekyll Island is about how the Federal Reserve was created. It talks about where does money come from? Where does it go? Who makes it? The book is pretty chunky and I must admit, from about half way to 3/4 it got a bit heavy but the first half and the last quarter are brilliant. They say that to predict the future, one must study the past. From reading this book, I am not surprised that we are in the financial mess that we are in today. What is more alarming is that I don’t think it was even preventable. In fact, it was inevitable! Crypto-currencies with it’s fixed supply won’t solve all the problems, but it’s a start. Just the mere concept of being able to create a trillion dollars out of nothing blows my mind knowing what I know now.
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Wellington October Blockchain Meetup

October 11, 2016
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Another interesting evening at the Wellington Bitcoin/Blockchain meetup. I presented on “How transactions are secured on the blockchain”, got some audience participation and gave a live demo as well. We took a closer look at the genesis block from the bitcoin blockchain and looked at the components of a single block. We highlighted the point that to understand how a blockchain works, it’s valuable to understand what’s in a single block. We went through some hands on Proof of Work examples where I dusted off my origami skills and made some candidate blocks. We had a race to see who could roll a 3 or lower. The winner then got their version of the block secured on the blockchain. There were some really good discussions afterwards on China’s involvement, on bitcoin scaling, on how blocks were constructed and if someone could create their own block if it followed all the right specifications. Many of the audience members contributed their knowledge and point of view also. Here is a pdf to the presentation. securing-the-blockchain-key Thanks to Sebastian and Wyn from API Talent for their hospitality.
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Building Blockchain Momentum in Wellington, New Zealand

October 3, 2016
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The last few months has seen an increased in activity in Wellington around blockchains and smart contract. September 3 2016 – Lets Talk Ethereum September 7 2016 – What’s happening with Bitcoin/Blockchain in Wgtn September 28 2016 – Ethereum: Smart Contract Basics What’s coming up: October 10 2016 – Guest international speaker – Arthur Falls from ConsenSys Systems October 11 2016 – Live demo on “How transactions are secured on the Blockchain” Currently there is an Wellington Ethereum NZ meetup and a Wellington bitcoin/blockchain meet up. We are in the process of combining the 2 communities and keeping the momentum going, so stay tuned!
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Neat paper on Blockchains, Smart Contracts and IoT

October 2, 2016
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Here is a link to a neat paper called Blockchains and Smart Contracts for the Internet of Things by Konstantinos Christidis, (Graduate Student Member, IEEE) and Michael Devetsikiotis, (Fellow, IEEE). http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7467408 It does a great job explaining some of the basics of blockchains and smart contracts before getting into lots of possible applications. If the above link is broken, here is another link: blockchains-and-smart-contracts-for-the-iot
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How to build bfgminer for the Alchemy miner from scratch

September 30, 2016
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Sometimes when everything has gone wrong and nothing is working, the last resort is to build the software from scratch. It actually isn’t as hard as it sounds. Here are the steps for a raspberry pi: Grab the latest raspberry pi image by downloading the image and placing it on an 8Gb usb card. Connect the raspberry pi to your computer via USB to TTL Serial Cable or with an ethernet cable. Run these commands >> sudo apt-get install >> sudo apt-get install build-essential autoconf automake libtool pkg-config libcurl4-gnutls-dev libjansson-dev uthash-dev libncurses5-dev libudev-dev libusb-1.0-0-dev libevent-dev >> mkdir bfgminer >> sudo git clone --branch alcheminer_USB-Dongle_Support https://github.com/jstefanop/bfgminer.git >> cd bfgminer >> ./autogen.sh >> sudo chmod +x ./configure >> ./configure CFLAGS=-O3 --enable-scrypt --enable-alchemist --disable-other-drivers --enable-broad-udevrules >> sudo make >> sudo make install It should take about 30-60 minutes depending on if you have a fresh pi image already at hand or you need to create it and the speed of your internet. Reference: https://bitcointalk.org/index.php?topic=1468120.0
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Wellington Ethereum Meetup: Smart Contract Basics

September 28, 2016
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Great to see momentum continuing at the Wellington Ethereum meetup yesterday. It was great to see a smart contract in action with Felix provided a short demo of a birthday contract in Ethereum. Thanks to Mark and 3months for hosting. Discussions included how the birthday smart contract worked, a plugin that provided Ethereum features and functions to the chrome browser called Metamask and that the DevCon2 videos should be coming out soon. The slides for DevCon2 day one are out and can be seen here: #PowerPoint Slides from #ethereum #DevCon2 by Misha Yang https://t.co/U2uXhr79Cp — Sean (@seandotau) September 28, 2016 Discussions also centered around how to get hold of bitcoins and one person talked about accepting bitcoins and saving up to 7% of transaction cost for his laser cut golden mean caliper business. (I had to google that too!) The next blockchain meet up is in 2 weeks time. Live demo on “How transactions are secured on the Blockchain” Tuesday, Oct 11, 2016, 5:45 PM API TalentLevel 1, 166 Featherston Street Wellington, NZ 20 Members Went Howdy all!To continue the momentum, join us for a live demo showing how transactions are secured on the blockchain. This will give everyone a chance to see how things work instead […]
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IBM Blockchain for developers

September 15, 2016
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Introduction I had heard about IBM donating 44k lines of code to the Hyperledger project a while ago and was curious interested to see what IBM had to offer in the blockchain space. IBM has a neat little learning path to understand more about blockchain technologies. It’s a free self paced course that takes a few hours (not really the 6 that it says) and does a pretty good job at explaining IBM, blockchain and the Hyperledger. What was good The course was professionally done with goals, quizzes at the end of each course, videos and notes and the best part was the hands on development environment Bluemix. It’s only a 30 day trial but no credit card was required. The content was good where IBM introduced terminology such as “world state” to mean the state of the blockchain or the ledger and “blockchain fabric” to mean blockchain framework. Above is a neat diagram of the various blockchain components in the IBM Hyperledger stack. The above screenshot shows the 1 click blockchain deployment process within Bluemix where everything is set up automatically. The car leasing demo was interesting behind the scenes but the front end interface was just like any […]
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Rich Dad’s Conspiracy of the Rich and Cryptocurrencies

September 12, 2016
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What is the link between this book and digital currencies or cryptocurrencies or even blockchain technologies? Surprisingly, the first part of the book goes into the history of where money came from, how in 1971, the USD was severed from the gold standard and from then on the US and other countries started printing money. Printing money is regarded as a bad thing for many reasons. This is why when bitcoin was created, it has a fixed supply of around 21 million. It was designed to mimic that of a natural resource like good. Finite. Everyone nowadays is jumping on this band wagon of blockchain technologies and smart contracts, which is great. I am as well. The difference being that my apprenticeship has started at the bottom. Learning about bitcoin has forced me to learn about what money is, where it came from and hopefully where it is going. Bitcoin wasn’t invented just for fun. It wasn’t invented so we could have smart contracts to automatically contracts without the need for lawyers. It was invented because there is a fundamental problem with the worlds money supply. There is an imbalance which means there will be a shift if something is […]
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Wellington September Bitcoin/Blockchain Meetup

September 8, 2016
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I co-organised the Wellington bitcoin/blockchain meet up yesterday and it was great to see a bunch of dedicated people turn up. We discussed topics from blockchain technologies, to Ethereum smart contracts to bitcoin trading. We also shared the mandatory rabbit hold story of how we all got into this “thing”. Thanks to Sebastian from API Talent for hosting us. Sebastian is the organiser of the Wellington AWS Users group. I am currently planning the next bitcoin/blockchain meetup so stay tuned!
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