previous days Question:
the 3 days of devcon are over. Are people interested in reports on the next 3 days of international Blockchain week (demo day + 2 days of global Blockchain summit) http://www.blockchainweek2016.org
The buzz during the day was around the "stick puzzle" that Bok Khoo was giving out to people. It is just a stick, with a loop of string. He gets you to turn away, he uses "the trick" to put it onto your bag and then you try to get it off.
The WeChat channel was just filled with everyone asking where they can get it, and the screaming that they can't figure it out. Only about 5 people reported they were able to solve it (I haven't yet) http://imgur.com/mYfJQP4 http://imgur.com/4Euka1a
I'm biased, but I thought the announcement from Microsoft with the update of cryptlets was a big deal. The morning sessions covered a few different oracle systems, the afternoon had lots of IPFS sessions. Microsoft - A Lap around Cryptlets https://azure.microsoft.com/en-us/blog/cryptletsdd/ https://azure.microsoft.com/en-us/documentation/templates/ethereum-consortium-blockchain-network/ https://azure.microsoft.com/en-us/blog/authomarleyg
Microsoft was a sponsor of Devcon1 & 2 Ethereum is a 1st class citizen Support for community & partners - Bizspark, Meetups, Workshops
Announcing: Bletchley v1 Distributed Ledger stack V1 is a private Ethrerum consortium, that you can spin up for your own enterprise / group http://imgur.com/olwwd36
Cryptlets are being developed to help with security, identity, etc. How do you get trusted external data feeds injected into the Blockchain? Doing things on a specific interval (every 15 mins) When price of something hits a threshold (oil goes above $40/barrel) Secure IP protected algorithms, but still share with blockchain network. Use libraries for common platforms (.Net, Java, etc)
Cryptlets vs Oracle Cryptlets will have a marketplace on Azure that will allow you to purchase and utilise
Use case: Trigger on an event Wake up on 4pm, if market was open that day, then give me the price of gold for that day.Get signature of attested server, attested sender.
Use case: Control Using smart contract like a traditional DB. Declare data you are keeping track of, and the functions/"stored proc" to update that data. Cryptlet runs off chain, and can be scaled up. http://imgur.com/ysgL8S2
Utility cryptlet. Use an attribute in solidity contract with cryptlet details Developer references at design time the cryptlet they want the contract to call Contract cryptlet, deploy the cryptlet at same time as contract.
Why would you want Azure to do this? SGX allows you to create "secure enclaves", can have complete isolation on the hardware chip where it is not modifable. Provides a secure enclave at the CPU level. Can give full attestation right down to the silicon. Will be provided as a enclave container on Azure. Will be released for .NET core CLR first, then other languages. Can create cryptlet libraries that you can scale and put into the Azure marketplace. An ecosystem for developers & ISVs to consume and publish.
Bletchley v1 released today will let you spin up a private consortium. Before today, it took a long time to try and deploy a private consortium (can take weeks to read doco, Now takes 5 minutes to deploy! Creates a private consortium, puts each member in its own separate subnet http://imgur.com/w4yUsqE
Mist Vision and Demo I was too busy sharing the release posts of Microsoft project bletchey v1, missed this talk. It did look interesting, I will watch this one later. Idea: Reward for bandwidth. Providing connection could replace mining as entrance point for desktop computers. Allow you to have a trickle so you can trigger smart contracts. Standardised backends, so that you can swap out the underlying node between geth, blockapps, etc. Web3.js https://github.com/ethereum/web3.js
Etehereum JS API Smart conracts are EVM opcodes, Helps translates calls to JSON RPC calls. Helps do the ABI encoding when sending data from JS to EVM It kept on growing, many different utility functions being thrown in. Is time to clean it up and be refactored.
They are now building a NEW web3.js The communication will be socket based, will enable subscriptions. Everything will be based on promises to subscribe to events, like log events. Bunch of other newer cleaner methods and ways to do things like deploying contracts. Smart contract security
Was a very good postmorteum of The DAO and things that could be done to mitigate it in the future.
An issue with The DAO was trying to do a massive jump from centralisation all the way to full decentralisation. Meant no one could step up and make a decision on how to save it. We need to make smaller steps towards full decentralisation as we learn as a community how to do this. Same security patterns as yesterday's talks: check invarients, beware 1024 call stack depth, reentry exploit (update state BEFORE executing calls), timestamps are manipulatable. Updateable contracts. Who can update it? Community multisig? We need better rools: formal verification, compiler warnings, improved IDEs, trusted libraries, excape hatches
Conclusion: It is still very early days in this space, be careful. A Provably Honest Oracle Model: Auditable Offchain Data Gathering & Computations
Oracalize is the most widely used oracle (until everyone starts using Microsoft Azure cryptlets ;-) ) Contract calls Oracalize contract with the data they want, off chain they see this get the data, Oracalise then trigger their contract externally, which does a callback to your contract with the data. Can use external notary servers. Can get proof from multiple external services to get a higher level of confidence about data (e.g. stock price from a few feeds). Off-chain (auditable_ computation) AWS sandbox 2.0. Put the execution package onto IPFS, AWS gets it and executes it, signs it. iEx.ec: Fully Distributed Cloud Thanks to the Ethereum Blockchain http://iex.ec/
Provides blockchain based execution environments Global market for computing resources. Idea is to do what we did before with "grid computing" use the idle capacity of computers. But this time do a trickle of micropayments. Allows people to harness this global power to execute their tasks in a global "distributed cloud". The Final frontier: The company smart conract http://otonomos.com/
Helping companies to incorporate on the blockchain. Smart oracles https://github.com/smartoracles
Connecting to external resources is difficult. Hard to try and use external currencies (like a bank account / fiat money) to make transactions. Could hook in paypal, HSBC, wells fargo, etc. Can provide your own payment services as an API to a smart oracle for smart contracts to consume. Do off chain data storage by calling smart oracle API Roadmap: more data sources & more payment methods IPFS & Ethereum: Updates https://Ipfs.io
IPFS is AMAZING, seriously go watch the full 1 hour talks Juan has given in previous years.
Current web has current issues. Centralisation, etc. IPFS is a new hypermedia transfer protocol Content can be retrieved not from specific servers, but instead via it's hash so that it can come from anywhere in the network (maybe from the person next to you who has cached it). It is highly modular, all of the transfer protocals, routing, naming, etc. are all swapable Is available as GO-IPFS & now JS-IPFS Means now you can run IPFS in the browser IPFS was great for static content, but not so great for dynamic content. Low latency pub/sub protocol will help with dynamic data. Created a distributed peer to peer chat app using this new dynamic content protocol. IPLD a common link-tree hash format Will be able to use IPFS to retrieve ethereum blockchain blocks DIRECTLY Can use IPFS as a package manager to retrieve them in a distributed manner.
Many projects are using Ethereum & IPFS Uport, Digix, Infura, Ujo, Eris, Blockfreight. Filecoin was created as a way to try and incentivize nodes to keep files longer time. People rent out hdd space to earn filecoin. Exchange bitcoin/filecoin. Use filecoin to store files in network. Filecoin is going to be built on top of the public Ethereum blockchain, as a virtual blockchain / token. IPFS Libp2p & Ethereum networking
Network connectivity between any 2 nodes can be difficult. Censorship, bandwidth, network issues, etc. Having to deal with different networking topologies and access. Libp2p & Devp2p is different. Devp2p is for Ethereum. LIbp2p is modular, can swap out components to change network access, encryption methods, etc. Can build up a MEGA mesh network, by utilising traditional wired internet, radio, bluetooth between some nodes. Web browser using web socket, to a node, which routes across network, to zigbee to a IoT device. Libp2p & Devp2p could merge and augment each other. Could create the libp2p components to replace the devp2p bits Any 2 nodes that speak the same protocol can communicate and be a part of the network chain. Experiment. They took the browser based version of EVM. Then used Libp2p to talk to the Ethereum network. Had a complete ethereum node running in a browser. Uport https://uport.me/
Universal identity platform Current challenges: key management. Ux for average person. Dapps via mobile. Identity and data ownership. How do you keep a consistent identity, even if you lose a key. Have some multisig contracts that you can use to keep track. Social recovery, use your friends to attest it is really you. Keep private key on mobile, do transactions on the desktop, scan a QR code to sign the transaction on your phone and send it off. A Deep Dive into the Colony Foundation Protocol
It is an open source governance protocol built on Ethereum Problem with voting is how to prevent Sybil attacks. Votes are weighted by a reputation score. Reputation is non-transferable that can only be earned. Total weighted voting helps mitigate this. Chain orchestration tooling & smart contract package management
Eris is tooling for developers. Package manager to build your own blockchain. Can compose a chain, e.g. geth + tendermint consensus. Init, install, do. Can easily install on Mac/bew, linux/apt-get, Windows/choco The Golem Project: Ethereum-based market for computing power http://www.golemproject.net/
Anyone can make an offer to sell computing power. e.g. Distributed rendering Want to create a standard framework that anyone can use to submit and process jobs. Status: Integrating Ethereum Into Our Daily Lives https://status.im
Want to get ethereum everywhere. "Mist for Mobile" Everyone is using their mobile phones for everything, but mostly using instant messaging. What would Ethereum in a IM window look? Created a IM mobile app that has a local geth node. tart up, it asks you to create a password, it generates a pub/private pair. Then can send messages via whisper, and the messages are signed with your public key. Can load Dapps up in the local webview and interact with them. Allows you to create "chat Dapps", that you interact with via text. Like chatbots Maker Ecosystem Overview www.Makerdao.com
Dai: seeking stability on blockchain. Stablecoin engine: smart contract that holds collateral reserves and controls the Dai lifecycle. MKR: open source community managing risk of the system In the last year, investing in a solid technical core. More slow and audit things. Moving into the next phase of stablecoin development. Their latest project is the "Simplecoin project" Meeting Thereum community's need for stability. An independent platform for creating centrally administered simple stablecoins. Issues create their own rule sets: Collateral types, participant whitelists, security parameters. Example: Shrutebucks. The only people who own it are Dwight, Jim & Pam. They backed it with 1/3 ETH 1/3 DGX 1/3 DUSD. Orbit. A distributed peer to peer app on IPFS https://github.com/haadcode
Created a full distributed chat room, itself distributed through IPFS. It is integrated with uPort for identification Using uPort allows you to verify that you are talking to the correct person in the chat channel. All their messages are signed with their public keys He also created a full distribited twitter clone, using uport for the identity as well. Orbit-db key value store DB that stores its data on IPFS. Eventually consistent Appends data to the DB, an event is sent to those subscribed on pub/sub so they can see the latest root hash. Based on CRDT Ethereum + Pubsub + CRDTs + IPFS = super power primatives to build dynamic distributed apps
Development considerations with distributed apps. Need to ensure that apps work offline. No centralised servers. No data silos. Provide integration path.
Future work: could you use uPort for ACL like permissions? Mobile use cases, how to make it work nicely on mobiles Building scalable React Dapp architecture https://github.com/SilentCicero/react-dapp-boilerplate
React + Ethereum He has a configured boilerplate template. Has contract scaffolding. Enforced contract Linting/testing. Wallet generation/identity. Preconfigured web3 instance. UI: Mature react arhitecture "react boilerplate". Prices listed in USD with ETH/btc via kraken api. A basic multi-contract example Dapp. Offline first, dapp runs without internet. Uses Redux. State models in UI & blockchains work well. PostCSS, CSS Modules, sanitize.cs. Redux, immutableJS, reslect, redux-saga, i18n, redux-router. Web3, ethdeploy, dapple, solium, eth-lightwallet, chaithereum, ethereumjs0-testrpc Enforced contract testing in 2 languages. Ethereum for Enterprise (BlockApps Strato)
Trying to make sure that Ethereum stays relevent to enterprise development. Why do you need a blockchain WITHIN an org, shouldn't they trust each other? Well different departments may not, they may reconcile differently, and can help automate/orchestrate between them. Blockchain is the "killer app" for cloud financial services. Legacy infrastructure, batch prossing, etc are all restricting fintech from progressing. Blockchain can happen in real time, can replace legacy. Ethereum is very flexible and programmable, works well. There are others based on Bitcoin (like Hyperledger). Ethereum + Blockapps = Extreme productivity + Proven Technology. Blockapps is extending Ethereum for Enterprise. Runs very well on Azure Enterprises don't want all their data exposed on public chain. Blockapps helps solve data privacy and scaling with multichain fabrics.
NEWs To Come - last updated - April 5th, 2016
Ethereum’s ecosystem is growing so quickly, very exciting news has a habit of coming out of nowhere. That said, there are more than a few things to have on our radar. Thanks to help from this community, here’s a current list. As always, what am I missing?
Ethereum Blockchain Development
- Our faq page may also be helpful for many common questions connected to the news listed below.
Other news we know will happen Coin relays and interoperability
- Metropolis - Includes user friendly Mist Browser and likely a light client.
- Serenity - Major scalability improvement and Casper
- Synereo partnership with a important update. "Synereo and Ethereum now have an end to end spec of a correct, fault tolerant architecture that is sharded, i.e. scales".
- Sharding development news. Sharding is a game changer for Ethereum and could allow it to 10000+ transactions a second (Visa currently handles 2000 per second). While its success is starting to look inevitable, more specific news should be watched carefully.
- Client updates - Ethereum’s clients are wide ranging - Go, C++, Python, Rust, Java, Ruby, .net. This allows Ethereum to attract developers with a wide range of programming backgrounds and empowers Ethereum for more applications. It was a VERY smart strategy by the founders of Ethereum. Watching the news for client updates is important.
- Impacts from Microsoft's Visual Studio platform momentum in products has just begun. Truly a historical moment for crypto, the impact of which will be realized in the months ahead.
One very powerful aspect of Ethereum’s blockchain is it allows both formal relays
between blockchains as well as general interoperability
between chains. Relays
allow Ethereum to empower other blockchains, basically letting these more classic chains (like Bitcoin and Dogecoin) use Ethereum as a service for smart contracts. This “bonded sidechain” is more powerful/flexible path to using smart contracts than building non-currency agnostic chains
. Similarly, interoperability
is a classic concept in software development with over 30 years of history. Ethereum’s Virtual Machine (EVM) greatly facilitates multi-chain interoperability – which could allow private chains to communicate with Ethereum’s public chain. Basically, Ethereum facilitates “chaining all the things”. In other words, even future private chains could interoperate with the Ethereum public blockchain to have a gateway between their secured private chain and the more global public chain.
Private chain development is a GOOD thing under this model, even if that private chain is not an Ethereum fork.
Current examples Public Dapps and/or ventures to keep an eye on
Ethereum ecosystem is growing in unbelievable way with well over a 100 DApps
. Below are some DApps and ventures that have been commonly discussed and seem to be generating news sooner than later.
- Backfeed socioeconomic platform
- Cetas A Know Your Customer (KYC) and credit rating system running on Ethereum and added to Microsoft Azure
- Colony Company builder DApp
- Digix.io Gold purchasing and asset tracking
- Etheria Decentralized Virtual World
- FreeMyVunk building an economy around virtual game assets outside the game of origin
- Maker stablecoin platform
- Otonomos Programmable company shares
- Pax Virtual nation and peer to peer legal system
- Plutus Use Ethereum to allow one to pay with Bitcoin anywhere
- Provenance Supply chain transparency
- Safemarket P2P trade system
- Slock.it Lock it, share it, economy; DAO model looks exciting
- Vevue Make videos, earn Bitcoin, using Ethereum blockchain
- Weifund Decentralize crowdfunding
Many of Ethereum's 100+ DApps will fail, but it only takes one to succeed to bring Ethereum to the mainstream. That said, sadly, there will also be scams. We should never forget Bitcoin's NeoBee
or any of the MANY failed exchanges. As a community, we'll want to keep a close eye out in more ways than one. Be enthusiastic but critical - with transparency being absolutely key to trust. Developer tools to keep an eye on Ether ATMs Embedded Devices
Potential surprises that are not really surprises
- Eth(Emedded) "Providing successful builds of Ethereum Clients for multiple, Linux based, ARM embedded devices"
- Anything China – ETH's value has largely been independent of anything to do with China, that must inevitability change.
- OKcoin inclusion (largest exchange in China, insane history with price boosts)
- Gemini inclusion (New Yorkers access to ETH)
Ethereum has essentially a monopoly on smart contracts, and from the list above, it should be clear that it has built a remarkable network effect around this ecosystem. It is a disruptive technology, that fosters synergies
, and when put in a greater perspective, it’s market cap remains quite tiny
, especially when you think of the relative size of the growing community
. Please let me know if there is something you'd like to see. Concerns You can support my ETH sleuthing addiction:
Autonomous Trucking and Blockchain Technology: Advancing Supply Chain Oversight. The vision of an autonomous trucking fleet is already becoming a reality for some freight companies. Uber, Waymo, Tesla, and Embark are all working on this technology. While autonomous driving is an interesting technology in itself, its application for the trucking Blockchain in Bitcoin (public chain) There are roughly two types of block chains: public chains and private chains. The former blockchain is operated by an unspecified number of network participants, and the latter blockchain has the characteristic that the operator can specify it. For Tesla'a autonomous "Robotaxi" fleet to operate as designed, it should implement Bitcoin’s Lightning Network which will serve as the primary payment rail coordinating all activity for the fleet. NewsBTC is a news service that covers bitcoin news, technical analysis & forecasts for bitcoin and other altcoins. Here at NewsBTC, we are dedicated to enlightening people all around the world about bitcoin and other cryptocurrencies. We cover news related to bitcoin exchanges, bitcoin mining and price forecasts for various virtual currencies. Blockchain technology is most commonly used by cryptocurrencies and was adapted by Satoshi Nakamoto to create and implement the cryptocurrency called Bitcoin. Blockchain is a distributed and public ledger, meaning it is available to everyone. Once the data is recorded, it will no longer be changed.
Filmed at the Startupbootcamp FinTech Singapore Demo Day, July 29, 2015. "Otonomos can help dematerializing your share certificates and write them on the blockchain." Professor Jeremy Pitt, Chair of intelligent and Self-organizing Systems at the Imperial College London, delivered this presentation during Bitcoin Wednesday at De Balie in Amsterdam on 2 September ... Beyond bitcoin: The future of blockchain and disruptive financial technologies - Duration: 1:53:41. ... Otonomos - Putting Companies on the Blockchain - Duration: 15:34. 💡V tomhle videu se vám pokusím vysvětlit, co je vlastně ten Bitcoin a jak funguje blockchain. 💰Nákup kryptoměn a $10 v Bitcoinu zdarma při nákupu nad $100: h... The real value of bitcoin and crypto currency technology - The Blockchain explained - Duration: 6:16. ... Autonomous robotic plane flies indoors at MIT - Duration: ...