Hyperledger Foundation Hyperledger FireFly, 15 Feb 2023

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From YouTube: Desarrollo de aplicaciones Web3 utilizando Hyperledger FireFly

Description

Hyperledger FireFly es un proyecto de código abierto que ofrece un conjunto completo de herramientas para el desarrollo de aplicaciones Web3. Provee un mecanismo de orquestación para coordinar operaciones de almacenamiento y transferencia de información en forma segura con transacciones de Blockchain. La estructura modular de FireFly provee soporte para múltiples protocolos incluyendo Ethereum y Hyperledger Fabric y puede ser utilizado en redes de blockchain privadas y públicas.

En esta presentación, Gabriel Indik, miembro del equipo de ingenieria de Kaleido presentará los distintos obstáculos que los desarrolladores enfrentan al construir aplicaciones descentralizadas y cómo FireFly provee soluciones para cada uno de ellos.

La primera porción de la presentación será dedicada al entendimiento conceptual de FireFly.

* Motivación
* Información compartida
-- Almacenamiento
-- Emisión
* Información privada
-- Almacenamiento
-- Transferencia
* Evidencia de comunicaciones respaldada por Blockchain

En la segunda porción de la presentación veremos a FireFly en acción.

Instalación
Herramienta de línea de comando
Interfaz de aplicación para programación
Interfaz de usuario gráfica
Ejemplos y utilidades

Finalmente veremos características mas avanzadas como el uso de tokens y la ejecución de Smart contracts personalizados.

https://www.hyperledger.org/use/firefly

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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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Tutorials: https://www.hyperledger.org/use/tutorials
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Vendor Directory: https://www.hyperledger.org/use/vendor-directory

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Learn about Hyperledger Membership: https://www.hyperledger.org/about/join

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

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Well, welcome, welcome to all of you to this.

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Latin American hyper ledgers webinar within the Hype Lecher Foundation, and the Linux Foundation.

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This time we have a guest with a very, very interesting. Presentation.

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Gabriel indicates that Gabriel studied computer engineering in his hometown of Buenos Aires, Argentina. Upon graduation,. He received recognition from the National Academy of Engineering. He, completed his master's degree in computer science at the macmaster university in Ontario Canada. Then he worked for 12 years at IBM and in 2018 Gabriel joined the caldeiro engineering team at Raley, North Carolina, where he is dedicated to the development of tools for decentralized solutions.

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Is an open source project that offers a complete set of tools for the development of web applications. Three provides an orchestration mechanism, To coordinate operations of storage and transfer of information in a secure way with block transactions. The modular structure of firefly provides support for multiple protocols and can be used in private blockchain networks and For.

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Its part, caleido is a platform that means that it radically simplifies the adoption of blockchain and digital assets or goods or digital enables the creation of blockchain networks in multiple geographies and clouds, with support for hyper, led protocols, Fabric hyper ledgers versus.

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Has been promoting enterprise blockchain since its inception and its driving force behind hyper layerline is part of the technical steering committee of hyper Legends and its engineering team includes some founding members of hyper letter itself. As you can see, we are in the best of hands and and I very much give you the floor. Like and thanks to Gabriel, Gabriel, Microphone and screen are yours.

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To present a slide at first.

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Then I'm going to show how one of the local tools to create decentralized solutions.

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Cuts off your sound, a bit, I 'm, going to remove myself.

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To see if yes, I'm going.

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To remove myself me on camera, yes, let's stop just you on camera to.

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To see you hear me better right now we hear you better Gabriel great, so I'm going to start sharing the screen.

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Concepts, and mainly for the motivation of why.

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Two organizations for these rectangles to the left of organization A and to the right organization B. These can be, for example, companies that have to collaborate with each other,, such as insurance companies, But, obviously The example can be extended to any industry. Each of these companies will having its own computer system, that computer system is going to have its own database processes, user interfaces now, obviously being different organizations most likely. These computer systems are also different. Different types of databases, different programming, languages, , different tools, etc.

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the systems within an organization are usually well integrated. But the question is: how do we integrate the computer systems in the different companies from one company to the other?

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Now, tools for the intercommunication of companies exist for many years. We have, for example, web Services, and there are also other messaging services available, Ah, such as kafka. So, let's imagine that we want to implement an integration between these two companies. Using these traditional communication methods, then each company would have to have its communication component and an integration component because, obviously, like the backend system, These companies are going to be different,.

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They have to manage to translate or transform the information that comes out at the same time that they transform information they receive from other companies. So. Let's see what this circuit would be, like. Let's. Imagine that the organization's database has a value X. In this example, a that is 1 in the integration is information would travel through the integration and communications to organization B. The subject What happens if, at a later time organization B consults its database And. That value is different, that is, there is a inconsistency.

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The problem is precisely that when using this type of communication, it is really very difficult to know exactly where the discrepancy happened, because one can think. Well. Maybe it was an error that occurred in the integration in.

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Organization that they mistranslated the value x At the moment to go out in such a way that when the organization sees it received it,, it was already incorrect or it may be that perhaps the information came out correctly, but when it was integrated into organization B, it was translated wrong or it could even have been that one of the processes of organization b or from a session to changed the value, as you were, logging out of the system, or it could simply be that the database was updated after the value was sent to the other organization, or it could be that this value was also changed in the database from the organization that received that value.

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The main issue here is that these types of errors are usually very expensive to fix, because they involve phone calls between the two companies to see where the problem happened and how to fix things manually. Let's see then Oh before go ahead. This obviously gets much worse when there are more than two companies, which is usually the case in this simplified example, where we have only two companies, we can see more or less where the problem is.

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Imagine we have a dozen companies that all have to agree in a value and if more than one has a different value, then it would be really difficult to know exactly where the problem occurred. So. How can blockchain be used in this case to ensure that the communication of information between these two companies is reliable,? What we would do would be to replace those traditional communication methods with blockchain nodes And.

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Instead of having an interface to let's say, communicate, one would have a decentralized application with which each of the cowboys would have to interact notice that the blockchain nodes are connected to each other, but they are connected in a network that can be extended to later add other organizations if necessary.

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Following the previous example, if in the database of organization a we have a value at that moment,, the computer system would simply use the centralized application to execute a transaction in the blockchain and What. This is going to do is that now we are going to have in the blockchain ledger, that is, in each of the nodes. There will be evidence that on a certain day, at a certain time, the organization placed the value 1 in x, and that is signed. by organization A, and it is also information that is immutable. It cannot be changed.

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It cannot be deleted so from there. We know that it is very easy for organization B using the led of the blockchain to know that the value is correct and is safe.

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Now, imagine that in a later point the value is changed to 5 and then in that case, what we would have is a second transaction that would follow the same path where, on a certain day, at a certain time, the organization placed the new value and then now that information is replicated in all the nodes So now in organization B, the value can be updated. In other words.

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This practically eliminates the possibility of discrepancies between the systems and even in the exceptional case of there being a difference, it is very easy to trace where the problem occurred. It.

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Is that, obviously one would think correct using blockchain, so I can have a much more reliable communication between these two organizations, so I am simply going to write my smart Contract, the decentralized application and start doing all the operations that way. However, that is a trap in the that many organizations.

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And realize only in the long run once they have already invested a great deal of time and effort in building that centralized system. That blockchain only represents a small percentage of the complete solution. There are a lot of problems for which the blockchain needs certain additional tools,.

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An example of this would be in this case that we are dealing with insurance companies,, these companies, for example,, send agents to see vehicle accidents and take dozens of photographs of each accident and that photograph can be of several megabytes each and then those photographs then go from,. Let's say,, they are sent to the system and have to be shared with the other companies,.

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But since there are many agents taking many photos of various accidents,, there are hundreds or thousands of megabytes that photographs are taken every days, placing all that information on the blockchain would not be practical, but still what we want is to have the ability and share all that information having the support of the blockchain to be able to guarantee that the communication is reliable, as we saw in the previous example So.

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How would we do that type of solution? In principle, I am going to move part of the graph to make room. There is a solution called ipfs. What it means is interplanetary to the system is a decentralized file system. Is software that, when executed, runs like that in a certain way similar to nodes in the sense that they connect to each other, but the big difference is that they do not execute transactions like non-blockchains. Instead, what they do is store files, and from that moment they make those files available to anyone else.

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Ipfs node that is connected ipfs nodes can either run on a public network, in which case any file one makes available is available to anyone connected to the internet, or they can be configured to be used on a private network. In this case that we are building a solution for communication between these organizations, these ipfs nodes would be connected to each other in a private network So, the computer system could store information in ypfs and then use the blockchain to put evidence of those files on it.

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Let's see how that flow would be from principle Finally,. Let's imagine that the organization's database contains information that can be a file,, a photograph,, a PDF, any type of document, and that we have to make this document available to the other organization. So. The first step would be to upload that file to the node from ipfs ipfs. What it does is instantly that it receives a file,.

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It calculates the Hash, that is, a String that identifies that file, one can always go from the file to that Stream, but cannot go from String to the file, that is, once once one has the Hash and you have the file. You can verify that one actually corresponds to the other. So once we get the ypfs Hash that can be sent to the decentralized application which will execute a transaction on the blockchain.

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From that moment on the ledger, both organizations will have the evidence that organization, a on a certain day at a certain time, has placed evidence of an ipfs Hash And, then that Hash will appear on the organization b side and will be sent first to the decentralized application that which is responsible for listening to the events of the blockchain And. That will then be sent to the computer system So the computer system, then what I can do is send that Hash And.

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This is where the file sharing mechanism through ipfs is,, which is going to happen next It, is that this node Upon receiving the Hash, it will ask if there is someone who has the file that corresponds to that Hash and the ipfs node of the organization will respond with. If I have it and will.