October 2024
Intermediate to advanced
270 pages
6h 12m
Spanish
book
Desarrollo práctico de contratos inteligentes con Solidity y Ethereum
by Kevin Solorio, Randall Kanna, David H. Hoover
Content preview from Desarrollo práctico de contratos inteligentes con Solidity y Ethereum
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Capítulo 4. Nuestro primer contrato inteligente
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Ahora que lo tenemos todo instalado, es hora de construir nuestro primer contrato. Siguiendo la tradición de los libros de introducción a la programación, nuestro primer programa nos saludará con un "¡Hola, mundo!".
Al desarrollar este programa, vamos a aprender a utilizar las herramientas que nos proporciona Truffle para crear y probar nuestra aplicación. También empezaremos a explorar el lenguaje Solidity, incluyendo un vistazo a las funciones y variables de estado.
Nuestro objetivo en este capítulo es encontrar un ritmo en la forma de construir nuestra aplicación y descubrir si vamos por buen camino. Para ayudarnos en ello, adoptaremos el desarrollo dirigido por pruebas (TDD) para ese bucle de retroalimentación instantánea.
Empecemos por configurar nuestro proyecto.
Configurar
Mientras nos instalamos, necesitaremos un directorio para alojar nuestra nueva aplicación. Creemos primero un directorio llamado greeter y cambiemos a nuestro nuevo directorio. Abre tu terminal y utiliza los siguientes comandos:
$mkdir greeter$cdgreeter
Ahora vamos a inicializar un nuevo proyecto Truffle de la siguiente manera:
$ truffle initEste comando generará la siguiente salida:
✔ Preparing to download✔ Downloading✔ Cleaning up temporary files✔ Setting up boxUnbox successful. Sweet!Commands:Compile: truffle compileMigrate: ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.