Oracles, or why smart contracts still have not changed the world?

Oracles, or why smart contracts still have not changed the world?For those who are interested in the topic of smart contracts, the answer to the question given in the header lies on the surface: to date, contracts do not have a reliable and complete source of information about what is happening in the real world. As a result of this, a nasty situation develops: we can describe complex logic in a smart contract, and the block will provide us with its unconditional execution. And now, it would seem, we are a step away from getting rid of the need for a third party when concluding contracts - that is what was meant by the words "change the world" in the title...
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Block-based derivatives: solving the problem by $ 500 trillion and winning the hakaton Consensus 2018

On May 11 and 1? 201? the 8base team in the person of me, Evgeny Semushin and Gabe Kelly decided to test their strength and compete for the AlphaPoint prize on the hakaton. Consensus 2018 , which was held in New York. A total of 33 teams participated in the hackathon, and among its sponsors were such giants as CoinDesk, Microsoft, IBM, Hyperledger and Quorum.
 
 
Block-based derivatives: solving the problem by $ 500 trillion and winning the hakaton Consensus 2018
 
 
At the AlphaPoint competition, we had to write an application linked to the crypto exchange, so we hoped that my experience in the hedge fund would be very useful. We wanted to create something more than a front-end to the existing block-decision...
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How to write a smart contract for ICO in 5 minutes

How to write a smart contract for ICO in 5 minutes  
 
Hello! In this article I will tell you how in 5 minutes and several teams in the terminal to launch a smart money collection contract for their ICO on Ethereum. This essay will potentially save you tens of thousands of US dollars, since any programmer - and not a programmer too - will be able to run a pro-audited and secure smart contract (instead of paying $ 1?000 - $ 7?000 for development). In short, you can send money to this smart contract and get tokens for this ERC20.
 
 
We can say that this article is a collection of all the experience that I got by launching the ICO for my project. Smart contract...
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Workshops on the development of smart contracts on Solidity

Workshops on the development of smart contracts on Solidity
 
We bring to your attention videos of a series of workshops about smart contracts in Ethereum. Our goal is to show companies and ordinary people how to use smart contracts, what advantages they can give in various fields of activity. We want them to enter the everyday life, become clear and close to everyone. And we believe that in the future the overwhelming majority of paper contracts and other interactions in the society will be replaced by smart contracts.
 
Today our main task is to create a community of programmers and inspire them to use smart contracts. This is why we conduct our regular workshops.
 
The l...
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How to write a decentralized multi-brokerage exchange for a day

How to write a decentralized multi-brokerage exchange for a day  
 
This article is a report on my participation in the second stage of the hakaton organized by karma.red . More information about the hakaton can be read at special page .
 
 
For those who like to read the code, not articles - project repository .
 
 
Fans of the video are also not offended :) In this video you can listen to a brief article, see how the exchange is implemented step by step and see its work live.
 
 
Article another participant in the hakaton from Vladivostok (the three guys from Vladik and one from ...
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As we play "Stone-scissors-paper" on the blockade Ethereum did. Part 2 Technical

Taking into account the comments to my the previous article I decided to write the second part, where the technical component of the game will be examined in more detail.
 
) [url]Https://js2.coffee[/url] ):
 
 
# We listen to the winner
this.autorun =>
filter5 = contractInstance.Winner {room: Number (FlowRouter.getParam ('id')),}, {fromBlock: ? toBlock: 'latest', address: contrAdress}
filter5.watch (error, result) ->
console.log result
if result
instance.winner.set result.args.win
console.log result.args.win
UIkit.modal ("# modal-winner"). Show ()

 
Apparently, we are referring to the ...
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As we play "Stone-scissors - paper" on the blockbuster Ethereum did

As we play "Stone-scissors - paper" on the blockbuster Ethereum didIn April 201? within our company came the idea to release their game on the Smart Contract contractor Ethereum. After thinking a few days and sorting out a few options, we stopped at the well-known to all of us from childhood the game "Stone, scissors, paper."
 
I will not disclose what other options we considered during the discussion, but there were many disputes, debates and fun. Some were too absurd, others rather complicated, others were not at all suited to blocking technology. At the discussion there were a couple of very serious options, which, it is possible, will see the light in the ...
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The question of a million is

Perhaps many of you were wondering: how will the behavior of a smart contract change if its data weighs hundreds of megabytes and stores hundreds of thousands or millions of records? Will the transaction go up? How will this affect the network as a whole? Will some types of variables in solidity cope with a similar task better than others? We decided to personally find out the answers to these questions and conduct an experiment in our private Ethereum network, simulating the described situations. What of this turned out to read further in the article.
 
 
The question of a million is ...
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