Hyperledger Foundation Fabric, 6 Oct 2022

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From YouTube: Demo: Low-Code Development Tooling For FT & NFT Applications on... Mark Rakhmilevich & Gourav Sarkar

Description

Demo: Low-Code Development Tooling For FT & NFT Applications on Hyperledger Fabric - Mark Rakhmilevich & Gourav Sarkar, Oracle

Without native Fabric token support, developing an application with fungible and non-fungible tokens involves high complexity and requires specialized expertise to build the complete token life cycle with Hyperledger Fabric chaincodes. Using low-code Blockchain App Builder tool created by Oracle for its blockchain platform, this demo will show how developers, consultants and business users can rapidly create production-ready fungible and non-fungible token chaincodes with built-in security. The low code approach for token chaincodes simplifies development & maintenance and expedites the adoption of tokenization due to low development cost and faster time-to-market for any application release. You will see how this tool uses simple json or yaml templates to specify token anatomy, tailor token behaviors and related properties, add custom properties and methods if needed. We'll then show the auto-generation in TypeScript or Go of core methods required to support behaviors and properties, and additional wrapper functions for full token lifecycle for FTs and NFTs. The generated chaincodes can be deployed locally or to remote blockchain nodes and invoked through REST APIs.

Sessions Details & Slides (if available): https://sched.co/14H5j
Access All Sessions: https://events.linuxfoundation.org/hyperledger-global-forum/program/schedule/
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Hyperledger – Open Source Blockchain Technologies

Hyperledger is an open source community focused on developing a suite of stable frameworks, tools and libraries for enterprise-grade blockchain deployments.
It serves as a neutral home for various distributed ledger frameworks including Hyperledger Besu, Fabric, Sawtooth, Indy, as well as tools like Hyperledger Avalon, Cactus and libraries like Hyperledger Aries, Ursa. Learn more about Hyperledger projects: https://www.hyperledger.org/use

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#Hyperledger #Blockchain
License
Creative Commons Attribution license (reuse allowed)

A

Thanks for joining today, my name is Margaret milovich I'm, with Oracle and with me actually remotely.

A

We have graph sarkar, who is our senior manager for blockchain product management, he's going to be helping me with a demo, we're going to talk a little bit about local development tooling and show you a blockchain app builder, which is technologies that Oracle he has developed over the last couple years uh to work with hypology fabric to automatically generate chain code, and while it started as a more genetic capability, we have also added support for was fungible and non-fungible tokens in it.

A

So we'll show you what that looks like just a couple of words on zorica blockchain platform, it's basically hyperledger fabric. With a lot of extensions. We started working on it. About 2017. It released the platform in 2018 in the market, so it's been out there for about four years or so around 200 250, maybe customers using it.

A

It's basically full hypology fabric platform, with Oracle additions, operations and management, monitoring, capabilities, API Gateway for rest, apis event, subscriptions and integration capabilities, standard, carpal, Ledger, peers, ordering service membership service for the network and then all of the pre-assample components around container management, identity management, operation, zero, Downton, patching all of the kind of Enterprise grade features that many of our customers need and expect. In the enterprise software plus a lot of security confidentiality capabilities.

A

We have added, we have an integration to streams of data into Oracle database from the history updates, so that you could apply analytics machine learning Etc. It works with us in non-orical nodes as well, and we have an on-premise version. This is predominantly used in a cloud.

A

Let's say: 80 percent of our customers are cloud-based in Oracle Cloud infrastructure, but 10 to 20 percent are using our OB Enterprise Edition, which is a virtual machine, software, Appliance kind of form factor, and they provide a bunch of Integrations, of course, with various applications, Oracle and third-party, and so on.

A

uh We have been doing a lot of work over the years to simplify the infrastructure, build right, so customers used to struggle a lot in the early days of particularly hyperledger fabric, there's always dependencies and all the complexities and version updates and all the rest now basically come to our Cloud. A couple clicks: it's blockchain is a service everything Spirit provision takes about 10-15 minutes, here's, the entire environment up and running. uh It's easy to integrate with all of the capabilities we've built in. There is a lot.

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Security measures added into it, role-based Access, Control access control is for chain code users to be able to have fine grain accessibility management management operations, monitoring without requiring a PhD ability to extend easily add new nodes, expand the network, and all of that, so we've done a lot of this work to help simplify the adoption of blockchain for customers. But then we found they're still spending a lot of time, buildings actual applications because blockchain Ledger Etc, it's all infrastructure.

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You need to have the smart contracts and all all of those application components that you need to make it valuable in your business. So we have done two things: one is: we've created a partner Community.

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We have a very strong partner ecosystems, variety of Industry solutions that customers can adopt uh for different use cases, and then we decided there's still going to be people who are going to need custom, build rather going to want to implement custom applications, and so we've created a tool called blockchain up, build it's a local development tool that provides a lot of productivity help to developers, but it can also automatically generate chain codes from a specification.

A

um You know it's essentially built in order to allow non-blockchain experts to build simple to medium complexity, blocks and applications without writing code, and so when we initially created it, you could specify whatever data assets you wanted to manage. uh You would Define the data schemas Etc and then we would automatically generate all of the crowd kind of persistence, business logic around that the next phase was to add tokenization support. It was fungible and non-fungible tokens.

A

um So the way this works is that you can essentially create a specification file and that's in yamla Json format and then, after you've defined the data assets, the properties, validation rules Etc. You automatically generate the chain code and scaffolds the project.

A

Once this is available, you can go ahead and use it as it's built with all of the basic Rod methods create update, query delete Etc, but you can also add your own custom Logic. On top, should you need to, and so it could be either no code or low code kind of environment and we'll show you how to add custom implementation methods in the demo. In a minute, um then, you can deploy to a local environment with a built-in hyperledger fabric infrastructure, and you can test it locally right.

A

Once you've done, testing and debugging Etc, you can package and deploy it automatically, using the tool to blockchain platform nodes or any other third-party hyperledger fabric nodes. You could just stand up as a product Packaging and you can start exercising it in your environment.

A

So a lot of value here, obviously or you know automated code generation- is a customization there's custom methods, much faster deployment and testing. If you're deploying to a remote environment to test difficult to debug, you have to go back and forth by the time you actually ready it's going to take a number of iterations and it's going to be slow.

A

Well, you can test and debug in a local environment, it's much much faster, so much higher productivity for Developers and then, when you package and deploy it in our case, you also automatically benefit from all those apis. We expose Every Chain code methods now automatically available as the rest apis that you can invoke, and we're going to show you that. So what you're going to see in the demo is a visual studio code extension version of the blockchain up Builder.

A

We also have a command line version for CI CD integration for power users, developers who don't want the UI, but most people would use the GUI in there. We can tell us a specification file. We will tailor fungible and non-fungible tokens.

A

We will then automatically scaffold the project generation code extended with some custom methods for Marketplace operations, so we're going to have a little bit of an nft Marketplace in the demo, then we deployed exposed rest apis goes through a one-time setup to initialize the token system, set up accounts and roles and then run through the actual transactions on the marketplace, uh minting issuing nfts, buying selling, etc for Fiat payments as well. As you know, tokens through those rest apis. So let me switch over now and have a graph gravity.

A

Services talk through a little bit more details of the demo.

B

Sure thanks a lot Mark so even though I'm demoing it remotely I'll ensure that you fill me just beside you. So for the demo we have selected a use case which we all can all relate to the nft art collection. Marketplace.

B

If you see the museums are looking for an alternate source of revenue from the people between 20 to 30 years, who are highly active on internet, but rarely ever visit museums, use case the NFP platform provider, onboards the museums first and provide the nft minting privilege so, which means that the museum curators can only meet with the nfds now nft platform provider also onboards the identity buyers, who are given some fungible tokens initially because they are getting onboarded for the very first time. The.

A

B

Curator meets so what what happens next is the museum. Curator means the arc token and the consumer one purchases, the r token, by paying it through the field credential, once the consumer one purchases, the token he can reset, he can resell that nft and it moves towards the seller's side and if he resells he will so so now the consumer 2 can purchase a token by paying through the fungible device, so he paid through the fungible token and in return he got specific.

B

So this is the entire application that we are going to implement through the blockchain and filter and the blockchain April on generate the chain code. It will help you to.

A

Deploy the chain code into the.

B

Article Junction cloud services, and also you can do the testing control the testing will do. We will use the rest apis, which are readily available from the Oracle blockchain platform. We'll use the postman to execute those so before so let us quickly jump into uh blockchain app builder. So, as Mark mentioned, this is the blockchain. App builder is code. Extensions. If you see over here, there's a home treatment related one. So here you can Define. So there are three things over here: one is a chain core specifications and environment, so the starting point for production.

B

Actually there is a specification, so you you need to specify a what kind of asset you were going to build with option application. So if you see over here, we are going to build an arm collection asset. uh What kind of asset it is so it's a non-functable whole whole non-fructible token and the standard that is followed here is ESC 721. The class signifies that we are providing additional methods on top of using 721.

B

The second part is this: uh declarative specification file is a behavior definition, so you can Define different behaviors online, so on and so forth, so it would create when it generates the code automatically, it will create all the pictures.

B

The two very important part over here is a metadata and the properties, so metadata is the one which cannot be changed once it is created. So the the uh the the token owner cannot change this metadata information like the painting name, the description, painter name or so on and so forth. But there are few attributes which can be updated by the uh by the token owner, like the price of the specific uh asset or the on sale flag.

B

If you'd like to put it again into the marketplace, you'd set the console flag to true, and on top of it there are custom method support. So you can define a number of custom methods here. So for this use case, we are defining three custom methods: one cell two post it into the marketplace for uh for for selling purpose, buy with direct payment. This is to buy it uh by the nft through the fiat currency and buy with loyalty tokens. So this is, with the fungible token, that you would like to purchase with right.

B

So let me quickly jump into how to create the chain code. So if you come into this chain codes tab, you just click on this plus, and this is what will pop up so I have already filled it in for the positive time. So we have the name, the language support you can have go or typescript and specification and the location so I'll just quickly create it. So it would take a minutes time to get this specific chain code created, so it would automatically generate the chain code.

B

I'll, show you uh or already generated chain code over here. So let me let me take you to directly automatically generate chain code.

B

Okay, yeah so by the time I just move to this. So this is the controller file, so the controller file has a complete code. uh It would be created over here. So you can see all the controller file is available here. The controller file contains two different types of things. One is SDK method, so this is where the SDK method is and then on top of it we have the wrapper methods. So this is the wrapper method. What we have between the SDK and the wrapper method.

B

We have the authorization check, so we have the authorization check which, which you can also customize right and.

A

This is just this is essentially implementing our role by security mechanism that you can extend.

B

A

B

One minute.

A

B

B

They say having the entire data structure for you so and if you see here uh in this controller file, we have sorry this is so we in the controller file. We can add the custom method, so here at the very end uh we have. uh These are the three custom method signatures that that are created, but you can actually replace this custom method.

B

So I have some custom methods already created, I'll, just replace it here, so I'll just replace it save it so now, so, once once you are once you have saved it now, your custom method is available for deploy. So you can just uh select it sorry, you can.

A

Just let's go ahead and deploy because we're running short on time here.

B

Right so so so we can, we can just deploy it, and then you can see from the execute. uh There are in number of methods which are automatically generated here now. I will quickly jump into the uh Postman collection. So this is the postman collection to test the readily available uh API rest apis.

B

So we have three different personas here: the museum curator consumer one is a Michael who would be purchasing it through the fiat currency and then the Gary consumer Gary is who is going to purchase it through the Loyalty token, so I'll quickly uh mint it.

B

So the first step is to Mint the nft, and if you see it would actually meet the nft with all the details that have been provided into the specification file you once it is minted, you can directly put it into the marketplace, so it's just setting the marketplace means putting it in the marketplace with with the price set for that and you can check the transaction history. So if you see over here, this is where the transaction history.

B

So you initially, your your price was set to zero, and this on sale price was false, but later on it was price, was set to 250 and answer flag is set to true so and now now the consumer Michael would like to purchase it. So he is going to purchase it with a price of 250, so he has successfully purchased it and he would like to resell it now if he wants to resell this nft. So it would again go back to.

A

The project see.

B

He will go back to the seller's site and uh now the Gary is going to purchase it through the Loyalty token. So this is where the buy with loyalty, token method comes into play and uh Gary would be able to purchase this, so Barry successfully purchased it, and if you check the transaction, the entire token history. So this is where the token history is so you can see that the owner details, so this is which ending with 41, whereas the previous one is the owner was 20 right.

B

So so the to the inter entire uh history is tracked of this. In the token history is tracked and you can develop any application, any tokenization applications very quickly and very easily, with the help of blockchain.

A

Right thanks, if you could go to the summary.

B

A

We'll just finalize here, but what you saw basically was uh a set of capabilities that really help uh many. You know companies and developers to accelerate the process of adopting the blockchain. um You know. Sometimes there are challenges in terms of infrastructure. Sometimes people have complex development tasks.

A

Etc these blocks are not built, they have low code, no code approach, Auto generation of tokens was fungible and non-fungible tokens as well as any genetic assets can be included, and you have integrated testing and deployment which improves quite a bit the productivity of the Developers um in the Oracle. Over the last five years we've been working within the hyperledger community and in our blockchain platform we have really focused on making it easy and quick to adopt with the blockchain infrastructure and all of the things that showed at the beginning, the development tools tokenization SDK.

A

We also implemented mvcc related optimization in the fabric peers, to allow multiple transactions for the same accounts to be committed within the same block, which is somewhat of a limitation in original fabric. But we have created optimizations to work around that, so we can actually run at very high performance. We've done some testing, you know with strongness of transactions per second in this kind of environment. So with that I'll stop, and uh you know, if you have any questions happy to take a couple questions here. We have additional.

B

Information on.

A

Our blog post recently on the nfts created actually in Oracle Cloud infrastructures. There is this thing called architecture Center where you can go in and look at various Solutions playbooks architecture, reference, architectures Etc. There is one specifically for the nft marketplace which goes through this in quite a bit more detail, obviously more than we had. You know in 15 minutes here, but again, thanks for joining and uh yeah.

A

uh I think it's using the original Sim API, if I'm not mistaken,.

A

uh We could check let's check offline and that I'm, not 100 sure but I think it's using the same one.