Database of Ethereum Explainer Videos
Cloud computing blockchain network
Aelf is a decentralized cloud computing network that aims to provide. Aelf has three defining characteristics. 

High functionality, resource segregation
 and optimized governance structure.

Currently most blockchain systems view all
 nodes equally. One node can only run on one single server and because of such, a bottleneck effect exists as the performance of the entire system is dependent on the performance of a single server. 

In Aelf's design, full nodes operate on server
 clusters and transactions are executed in parallel. Plus when the system load was large, a node can expand horizontally by adding more servers with ease.

Bookkeepers function as
 data centers and the multi chain structure functions to allow more server paths where every node is a sub cluster.

Because of the multi
 chain structure, Elf simultaneously achieves resource segregation. This means that an application's healthy operation cannot be affected by other applications.

 Aelf, the main chain is in charge of unified planning and indexing while the side chains operate independently without interference with each other.

Side chains through verification of the
 main chain achieve cross chain communication thus avoiding large single application data congregating the whole system.

Aelf believes that token holders
 should have the power to vote on the development direction of the blockchain.

 realize this belief, Aelf provides a democratic delegate voting system for governance structure.

Aelf is focused on technological
 advances backed by growing investors and supporters from all around the world.

 Aelf is actively cooperating with top companies for all different industries and establishing complete multi industry solutions aimed to connect the Aelf main chain with uncoupled business chains. 
Create, manage, and deploy smart contracts
Ethereum is the next big step for decentralization. Thanks to its smart contracts, anyone, anywhere can provide advanced services, manage assets and prevent conflicts that could arise from malicious uses without trusting a 3rd party.

Here is the problem. It takes
 advanced computer programming skills to write and deploy a smart contract. And even the most experienced programmers can make mistakes that result in loss of assets or create vulnerabilities that are exploited.

Imagine a world where everyone on the internet,
 regardless of their technical know how can take advantage of the security and reliability of smart contracts.

Introducing Blockchat. The service that
 let's you deploy your own smart contract on the ethereum blockchain with just a few clicks. No coding knowledge, no costly mistakes and still completely decentralized.

The next time you buy from a
 stranger online, just open a template for secure purchasing, select the options that fit your needs and click to deploy. It's that easy.

Blockcat also lets experienced users design
 new smart contracts by clicking and dragging in a visual interface which utilizes code that has been professionally audited.

 business owners, our smart contracts will handle complex transactions accessible worldwide and customized exactly to your payment model.

If you are a developer,
 we provide a marketplace to release your work. Every time someone uses a smart contract you've written, you receive a portion of the fees.

 is the world's highway for smart contracts whether you use them for secure purchasing, crowdfunding, tamper proof voting or anything else ethereum can offer, Blockcat makes it instantly accessible and simple.

 programming is required. [music] [music] 
Distributed computation
It's just a matter of time. This is a processor, it executes small tasks at breakneck speeds from your computer, your phone and your smart watch. You don't need to know how it works, you only care that it is fast.

Golen is fast.

And here is you, needing to simulate
 a neural network but your little computer just isn't up the task. But if you connected to Golem, you could simulate neural networks, sequence DNA, render complex imagery or whatever you need to do in a fraction of the time.

Let me show you how it

Golem is a distributed
 super computer. It taps into a global network of unused computing power and it's decentralized. This means that no one owns it and anyone can use it, even you.

When someone has a
 job for Golem, it automatically finds the best computers available for the job and pays them for the power that they provide.

One of them can be your computer, that could be
 your money.

Whether it's training artificial intelligence or
 rendering physical models, Golem scales with the task. And it's all made possible thanks to the Ethereum blockchain.

 more, developers can tap into this network by building apps on its platform, creating infinite possibilities.

So get ready, Golem is the
 future of computing. It's just a matter of time. [silence] 
Push open source forward
Meet Chuck, software developer extraordinarie. He solves interesting problems all day or at least sometimes he does. His days will up with meetings and other tasks and pretty quickly before you know it, Chuck hasn't spent any time doing what he loves. But it doesn't have to be this way.

If you are like
 Chuck, you got into programming with dreams of becoming an almighty problem solving software developing robot. With Gitcoin, you can live that dream.

This is the world of
 Gitcoin, a distributed platform for software developers where you can solve real software problems for real companies.

As you solve more problems, you
 build skills. Develop relationships and collect bounties. 

Gitcoin disrupts the status quo
 in how development problems are solved today.

What's the
 payoff besides watching your robot self grow up? 

You get to solve real problems. You get paid to do
 it. And you meet great people along the way.

To start building your
 bounty today, check out the Gitcoin Bounty Explorer. 
Decentralized applications platform
[silence] [silence] [silence] [silence] [silence] 

Thanks to the power of modern communication, we have the ability
 to create technologies that are decentralized, removing middlemen and allowing users to interact with each other directly through a global network.

 applications have been becoming more and more important in the last ten years. And have the benefits of massively reducing cost and barriers to entry. Removing single points of failure, preventing censorship and ensuring transparency and trust between all the parties involved in an interaction.

 a file sharing network developed in the early 2000s are arguably the first decentralized application to have been created. 

BitTorrent allows anyone to share any kind of file
 with anyone else in the world, allowing people to distribute the content quickly and easily even if they do not have the resources to pay for their own website or server.

Five years later Satoshi Nakamoto
 came up with the idea of a blockchain, a sort of distributed database and used it to build bitcoin, the world's first decentralized currency.

 currencies like bitcoin allow people to send money instantly anywhere around the world with no regard for national borders with negligible fees.

Bitcoin is increasingly being used for international
 remittances, micropayments and commerce online.

Decentralized applications
 for finance, cloud computing, messaging and distributed governance are soon to come.

Ethereum a platform that is specifically designed for
 people to build these kinds of decentralized applications of dApps for short.

The ethereum client
 which we are calling the ether browser will include the ability of peer and peer network for sending messages and a generalized blockchain with a built in programming language allowing people to use the blockchain for any kind of decentralized application that they want to create.

Ethereum can be used to build financial applications that
 are fully trustworthy and transparent because they run on the blockchain. Online cryptographically secure systems for managing property and contracts. Social networking and messaging systems that allow users to maintain control of their own data.

 for treating under utilized computational resources like CPU time and hard drive space. And eventually tools for online voting and distributed governance.

The most exciting
 applications of ethereum are probably the ones we have not even thought of.

As with all new platforms for
 innovation like the protocols that underlay the internet itself, it's not always easy to predict what they are going to be used for.

GMail, Facebook, Twitter, Instagram
 and the modern internet as a whole are all a result of early development in the world wide web and javascript the programming language of the world wide web from the 1990s.

Similarly by providing
 a universal programmable blockchain and packaging it up into a client that anyone can use, the ethereum project hopes to do the same for finance, peer to peer commerce, distributed governance and human collaboration as a whole.

Now the question is, what will you build on
 top of ethereum? 
Frictionless user experience for the blockchain
OK, so you create an amazing ethereum web application but know that getting the average person to actually use it is a major issue. 

Wouldn't it be great if you could
 make your dApp easy and familiar to use in 5 minutes? 

That is exactly what Portis does. Portis offers your
 users a private and secure gateway to the ethereum network.

 friendly and works right in the browser. No installations required!

Developed for
 web3.js, Portis will automatically work with your existing dApp.

So why
 wait? Take your dApp to the masses with Portis today.
 connecting users to dApps. 
Decentralized bonding curve curation mkt
How does the decentralized internet work? In the decentralized internet, the services you'll be using will no longer be run by central authorities, instead they will be created on transparent shared databases called blockchains. 

These blockchains will consist of smart
 contracts, computer programs that allow to parties to set the terms of the agreement and self executes when these terms are met.

However there is a
 challenge. Smart contracts need data. While the world is ready to transition to the decentralized internet, many potential decentralized applications, Dapps have remained at the conceptual stage.

The main
 roadblock here is the data challenge.

 order for a smart contract to self execute, they need to have access to real world data which they cannot do on their own. For this they need Oracles, data feeds that provide external data and push it onto the blockchain.

At this moment there is no easy way of creating
 Oracles which is why many dApp ideas have not been realized.

Zap is the
 solution to fixing the dApp roadblock. 

Zap will finally bridge this gap by creating the
 first global decentralized data marketplace where users can publish and subscribe to Oracles.

Users can rank and verify the oracles
 allowing us to constantly perfect our product to serve our customer's needs.

By creating a standardized
 data ecosystem, we will ensure infinite possibilities for the dApps of the future.

Zap is much more than just a
 technology. Zap is the final missing piece of the puzzle. The last step towards the launch of the new decentralized internet.

It is an engine
 for a whole new generation of entrepreneurs who want to bring their ideas to life in a fair and transparent way.

It is a tool for people who don't want to be
 dominated by monopolies. Who wants to be in control of their data. People who want to live in a society based on trust, respect and equality.

The society of the future.

Join us, help us help you
 pave the way for the future. 
The Ethereum Data Analytics Platform
How many things have you seen today and done and learned? Multiply that number by millions and you'll begin to see how much history we make on earth each day.

Now imagine a universal chronical,
 collectively written by a decentralized network of global individuals, transparently archiving our ideas, our explorations and discoveries are lessons for the future.

That chronical has a
 name. The ethereum network.

We are citizens
 of the collective data era, when for the first time ever history can be written by everybody. But data is only as relevant as the quality and clarity of its interpretation. And that is how data becomes something much more valuable, information. 

Welcome to Alethio, the ethereum data
 processing powerhouse. Alethio is a comprehensive suite of blockchain exploration, analysis and forecasting products developed on top of the ethereum platform.

We provide
 solutions for your ethereum interactions, helping you observe, understand and act upon clear objective information. 

EthStats, the next generation of blockchain
 explorers, packing extensive network statistics and the most granular and actionable analytics available today.

Deployable analytics suite.
 Put the spotlight on your private blockchain. Monitor everything that is key to your projects and make impactful decisions based on rock solid information.

Custom analytics.
 Callibrate Alethio's solutions and reach the perfect setup for your specific needs using our expert blockchain consultancy team.

Advanced alerting system.
 Stay a few seconds ahead into the future and use the events on the blockchain to your advantage with Alethio's unique custom alerting capabilities. 

Alethio's products help you make every
 sense of the ethereum network and its opportunities.

Step in the future,
 join the Alethio evolution. 
Help game devs integrate blockchain
Jake plays a lot of video games. He spends a few hours each day on his favorite titles and he's really good at it.

He's a true master at choosing the best
 in game gear available. A true professional can [inaudible] by the right use of tools.

If only
 he could transfer some of his in game awesomeness into his real life struggles. Things would all be so much simpler. 

Maggie is a game developer. She creates her titles with passion
 for folks like Jake. Maggie hopes to sell her next game. She would gladly like to see Jake turn the hours he spent playing her game into a big payoff.

But there are certain
 limitations to current gaming technology which neither of them can overcome.

With Hoard this would not be a
 problem. Hoard introduces blockchain technology into video games to provide interchangeable tokens that let users track and identify unique game objects.

Now in game items can provide real value to
 whoever acquires and carries them.

The Hoard token
 enables Jake to swap his items with other valuable items in different games. Lend or rent his items to somebody while he is on vacation. And use custom objects crafted by Gina in his own campaign. 

He can even sell his valuable items on the open market
 and make an actual buck out of all the hours he played. 

This is all possible with the Hoard token.

 the Hoard token, Jake has true ownership of his items. At Hoard we understand how big of a game changer this is. We understand the players and developers perspectives.

We've shipped plenty of
 games ourselves. Some of them might even be among your favorite titles. We probably know Maggie and a few of her teammates.

That's why we provide an easy to implement
 SDK so Maggie and other producers can become a part of the Hoard universe and exchange tokens between their titles. Creating an extra layer of fun for Jake and Gina and every player who felt attached to all the artifacts they've discovered in their favorite games.

Hoard, true ownership. The next level of
 fun for video games.

Get in touch to see how you can
 become part of the next generation of gaming. 
Lets anyone create, share, and monetize AI services at scale.
[music] [music]

 begins the greatest age of progress and exploration in the history of artificial intelligence. We can put together many pieces of smart AI technology into super systems, increasing complexity and stability.

It provides a
 framework for safety and transparency in artificial intelligence while providing privacy for people's personal data.

Right now there is no platform anywhere
 in the world that is specifically designed to make it easy for different AIs to communicate with each other, to share data with each other, to make requests of each other. To compensate each other for their work. To rate each other as to how well they did different things. 

Sophia is a good platform for bringing
 together the technologies of artificial intelligence. Using SingularityNET has a kind of networking protocol.

The AI code is there.
 Free and open source on the internet right now. It's just hard to find and hard to use.

 can complete that connection between AI developers and AI users. 

If we achieve SingularityNET,
 the way that we have portrayed and envisioned it, the way that we've engineered it, it will become the single most valuable technology in al of history.

This is the chance
 for us to change the world together.

We need
 participants. We need you. Your time, your mind, to make this happen.

Work with
 us to realize the beauty and power of SingularityNET. 
Shortcut to the blockchain ecosystem
Hi I'm Alex, Chief Technology Officer at Squarelink. Today I'll be showing you how to build Squarelink into your dApp to allow users to easily call smart contracts.

 is the first access tool for blockchain tools and services that enables users to securely recover lost private keys.

Users can sign up, sign in and
 sign transactions on multiple blockchains without ever touching your private key.

To get started as a
 developer, you create an account on our developer portal and register your first app.

Here I've already created one
 called Squarelink demo but it's not quite ready.

To set it up and begin requesting transactions,
 we'll head to the signed transactions tab and register a token.

You'll have the option to use bitcoin,
 litecoin, ethereum or a custom ERC-20 token.

Today I'm going to build support for my dApp
 for Vechain, a blockchain designed to enhance supply chain management processes.

Because Vechain is a ERC-20
 token, I can simply enter its ethereum contract address and get going. 

Here you can edit a few custom
 properties. For my dApp, once a user signs a transaction I want them to be redirected to my confirmation page. So I'll just update the on success redirect. 


Now if you look at your integration code,
 you'll see a pre-built button template that you just need to fill out with your specifications.

I've already built it into
 my dApp here, so all I have to do is update the token ID. [silence] 

In this
 example my button is requesting that the user call some transfer method in the ERC-20 contract with the recipient address and the amount as parameters. 

Now the user can click on the button in my dApp
 to approve and sign the transaction with their Squarelink account. 

Once the users transaction is successfully
 sent, they'll be redirected back to the confirmation page that I specified in the development [inaudible].

 that, you've successfully integrated Squarelink into your dApp.

If you want to try Squarelink or want more info,
 check out our whitepaper at and see our developer documentation for more examples and instructions. 
Sharded, developer-friendly, proof-of-stake public blockchain

What if you could empower your
 customers to make instant cross border transfers, manage global supply chains, invest around the world and protect their identity all while fully owning their digital assets?

What if you could
 easily build applications that have all the benefits of being on large 3rd party platforms like Facebook but could never be cut off for being too successful.

What if
 you could get paid to create the infrastructure to power truly open web without having to show your users a bunch of ads?

 you ca.

NEAR is a platform that makes it easy
 to build decentralized applications that are secure, scalable and easy to use for your customers. 

Because Near is decentralized, you have the same access
 to global state as you get with developing on large 3rd party platforms but without the risk of that platform shutting you down because your business became too successful.

You can build your app from scratch or assemble
 it from our ecosystem of open source components.

NEAR makes it easy to work with complex
 features like identity, monetary transactions and advanced cryptography.

 coding right away in Near Studio, our online IDE. Or download our development kit to easily write, test and deploy applications from your local environment. 

Go to to learn more and
 start building the future of the open web today. 
Powering the Data Economy.
[music] [music] 

According to Forbes, by the
 year 2020, global data volumes are expected to reach 44 trillion GB. 

 about 80% of that data remains untapped. This represents a large missed opportunity for the growth of industries and the advancement of technology.

From assembly lines to healthcare,
 data has the potential to assist in innovation and discovering the next break through. 

Part of the problem
 lays within the complexity in how data is collected, structured and shared, making it harder to extract its true value until now. 

At Hut34, we solve data problems because
 data solves problems. 

The Hut34 data
 revolution was inspired by Alan Turing's work during WW2 when he and his team worked tirelessly to crack the German Enigma encryption machine.

Their work took place
 in actual huts numbered 1 through 8 in Bludgley Park with Huts 3 and 4 transforming data that could then be used by those who needed it.

 is working to build blockchain based tools to power the open data economy. Our technology stack extends across data collection, security, storage, preparation and sharing. 

Standing on the shoulders of
 giants, Hut34 is bringing the data economy into the 21st century with an easy to use suite of data tools that optimize every step of the data supply chain. 

 powering the data economy. 
TX Management for Builders
Hey there, Matt Cutler here from Blocknative. Giving you a quick walk through of our platform.

As you can see, the Blocknative platform
 sits on top of the ethereum mempool. We operate a global infrastructure that snapshots the mempool multiple times per second and makes all changes to transaction states available via our notify API which we then package up into a developer friendly framework called the notify SDK.

And finally we offer rich frontend components
 called notify JS for notifications and onboard JS for onboarding users to wallets and configuring them correctly.

I'm going to give you a
 quick demo of onboard JS and notify JS in action. And I'm going to do so via the MakerDAO CDP portal which we have ported... You will see this here, as it is publicly accessible.

It looks very
 similar to the regular one. But over here we have a select wallet portal rather than a whole series of buttons which you normally see.

When you click
 select wallet, what you'll see is this modal. This is onboard.js and there are a couple of interesting things about this.

First off the look and feel is totally customizable.
 Second, the developer can select which wallets they want to appear here in which order. And also which ones are primary and secondary.

So if I hit show more,
 I'll see additional options down here. And also if we want to provide the user with a bit of a description, that's there as well.

This is all controlled by onboard.js

For today's demo I'm going to go ahead and select
 Metamask and you'll see login authorize your wallet. This is onboard JS modal showing that. I'm going to go ahead and login to my Metamask and connect.

And right away onboard.js
 detects that my wallet is configured and ready to go and let's me in.

For instance if I were
 going to go up here to my Metamask and switch networks, you'll see right away onboard.js detects that and says you've got to go ahead and switch your network.

Interestingly and this is only
 unique to onboard JS, we enable switching wallet on the fly. So if I wanted to go back and select a different wallet I could do so here. But again let's go to Metamask and let's go ahead and the whole point of it is it helps the user make the right decisions without getting in the way.

 I'll show you notify JS in action very quickly here. I'll go ahead and select create a CDP and we are going to create this at .006 ETH and we'll go ahead and generate some DAI out of this. Let's generate 50 cents and go ahead and collateralize.

 down here. As soon as I hit finalize and create CDP, you'll see your transaction is waiting for you to confirm. This is a little notification powered by notify JS. Again customizable look and feel and langauge and where it appears on the screen.

If I
 were to reject that, you'll see the notification here and the notification to draw the I.

Again if I were to go ahead and finalize
 [inaudible] themselves very quickly and I go ahead and confirm. 

 was approved and now it is pending.

You will see the language here is customized
 to the underlying dApp. It's a transaction to create a CDP out of a positive amount and generate a certain amount as well.

What we are
 doing on the backend, our platform is monitoring the mempool for this transaction. And you can see green check, you are in good shape.

Now what will happen is once the underlying
 dApp picks that up, the UI is reflected. 

That was a real quick overview of Blocknative's
 notify platform. Our onboard JS and notify JS library.