Eifel42

Today I bought arc42 by Example (ISBN-978-1-83921-435-6) (special offer). The authors give examples of their practical understanding of software architecture documentation. It is an excellent addition to the books by Dr. Gernot Starke and Stefan Zörner https://arc42.de.

Why a Blockchain? Many people ask it, some Experts see it as the new golden hammer for all database tasks. Blockchain is a synonym of Distributed Ledger Technology (DLT). A DLT-System has three main components, the Ledger (Blockchain, technical a chained list), consensus algorithms, and distribution. Distribution makes it safe against manipulation; every participation holds one copy of the ledger. Business Perspective Figure I-I System context company, © Copyright inoatec, 2020 [Read More]

This Example implements a HapiJS Restful Services that register coordinations of stars. The services run on a NodeJs Services and use LevelDB to persist data. A simple massing Blockchain Services entirely in Javascript.

myStarBlockhainJS

Star Notary Service allows you to create stars with coordinates in the Ethereum Blockchain to save. This application is a demo application, which the functionality of a DApp demonstrated. The functionality of Solidity and interaction with Javascript. The application implements the Ethereum ERC-721 Token Standard as a Solidity Smart Contract. The web frontend uses Javascript. The application stores the start name, a description, and the coordinates (RA right ascension, mag absolute value, centaur). [Read More]

1.0 Einführung und Ziele Star Notary Service erlaubt es, Sterne mit Koordinaten in der Ethereum Blockchain zu speichern. Diese Applikation ist eine Demoanwendung, welche die Funktionsweise einer DApp demonstriert. Es wird die Funktionsweise von Solidity und Interaktion mit Javascript vorgestellt. 1.1 Aufgabenstellung Die Anwendung implementiert den Ethereum ERC-721 Token Standard als Solidity Smart Contract. Der Webfrontend nutzt Javascript. Die Anwendung speichert den Start Name, eine Beschreibung und die Koordinaten (RA Rektaszension, mag Absolutwert, cen Zentaur). [Read More]