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Resultados de búsqueda para Smart Contract

Evaluating the software frameworks for developing Decentralized Autonomous Organizations

First Bitcoin in 2008, and later Ethereum in 2014, held a powerful promise: online decentralized governance, without servers or central controllers, not just for finance applications like crypto-currencies but for any organization. The so called Decentralized Autonomous Organizations (DAOs) were expected to fulfill such a promise, enabling people to organize online relying on blockchain-based systems and smart contracts automatizing part of their governance. In 2016, three DAO software frameworks +IBQ-Aragon, Colony and DAOstack+IBQ emerged aiming to facilitate development and experimentation in this field. To which extent do they facilitate DAO development today? This paper performs an analytical comparison of these three frameworks, focusing on their current functionalities for building DAOs. We find Aragon to be the most complete in several aspects. In order to provide more details on the challenges on building DAOs with current frameworks, we present a case study using the Aragon framework. Through this case study, we have piloted DAO development using this framework, and thus we may highlight the benefits, limitations and problems that developers face when adopting it. Our findings show that, even if Aragon does provide superior capabilities to other frameworks, it is still highly challenging to build a DAO with the current tools. Today, problems include issues on software engineering, instability, localization, documentation, lack of formalization and standards, and interoperability. Complementarily, this paper aims to provide some guidance to those developers aiming to face the challenges in developing a DAO, and to those aiming to fix the major weak points that make DAOs the organizations of a still distant future.

Autores: María-Cruz Valiente / Juan Pavón / Samer Hassan / 
Palabras Clave: Blockchain - DAO - decentralized autonomous organization - Ethereum - Smart Contract - software framework

SmaC: soportando el modelado de contratos inteligentes

A pesar del interés que despierta la tecnología blockchain y los contratos inteligentes, su complejidad supone un problema que ralentiza su adopción. Con la intención de contribuir a minimizar este problema, en la última edición de estas jornadas presentábamos una propuesta metodológica y tecnológica para el uso de modelos en el ámbito de los contratos inteligentes. El objetivo de este trabajo es presentar los primeros resultados de esa propuesta.

Autores: Cristian Gómez Macías / Juan Manuel Vara / Francisco Javier Perez Blanco / Esperanza Marcos / 
Palabras Clave: Blockchain - Model-Driven Engineering - Smart Contract

Easing DApp Interaction for Non-Blockchain Users from a Conceptual Modelling Approach

Blockchain decentralized applications (DApp+IBk-s) are applications which run on blockchains nodes. Thus, to interact directly with this sort of applica-tions, users need to have a blockchain address, wallet, and knowledge about how to make transactions to interact with DApp+IBk-s. Therefore, the knowledge required to use a DApp can easily make users to desist when trying to interact with them. To tackle this issue, we propose a software ar-chitecture that will be in the middle of the user and the DApp, thus making users initially unaware of the fact that they are interacting with a DApp. This is achieved by analyzing the relationship between DApps and Apps by using UML modelling. Next, based on the previous analysis, we created a middleware for users to interact with a DApp in the same manner they do with a traditional web app, i.e., by using usernames, passwords and user in-terface elements instead of addresses, private keys or transactions. To put the developed middleware into practice, we developed a DApp that makes use of it. This DApp registers the time control of workers from companies by using blockchain to store the data in a secure and non-modifiable man-ner. Finally, we performed an experiment, thus demonstrating that a DApp that implements the proposed middleware would improve its usability for users with no experience with blockchain.

Autores: Miguel A. Teruel / Juan Trujillo / 
Palabras Clave: Blockchain - Clockchain - conceptual modelling - DApp - Ethereum - Middleware - Quorum - Smart Contract - Solidity - UML

Una propuesta para soportar la especificación a alto nivel de contratos inteligentes

Un contrato inteligente es una representación digital de un contrato , cuyas cláusulas se ejecutan automáticamente cuando se cumplen sus condiciones, sin necesidad de un intermediario. Debido a su potencial, instituciones de muy diversos ámbitos están explorando las posibilidades que les ofrece la aplicación de esta tecnología, encontrándose con un problema recurrente: la elevada curva de aprendizaje del diseño y creación de contratos inteligentes, tanto para los profesionales de las áreas de negocio, como para los desarrolladores no familiarizados con esta tecnología. En este trabajo, tras analizar la situación actual en cuanto a la existencia de herramientas o soluciones para la definición de contratos inteligentes, se presenta una propuesta basada en la aplicación de técnicas y principios de la Ingeniería Dirigida por Modelos, que mejorará ostensiblemente los niveles de usabilidad de las soluciones existentes.

Autores: Cristian Gómez / Juan Manuel Vara / Francisco Javier Perez Blanco / Esperanza Marcos / 
Palabras Clave: Blockchain - e3value - MDE - Smart Contract

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