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Ethereum Cookbook
book

Ethereum Cookbook

by Manoj P R
August 2018
Intermediate to advanced
404 pages
11h 19m
English
Packt Publishing
Content preview from Ethereum Cookbook

Web3J

  1. Web3J is a Java and Android library for interacting with nodes and smart contracts on the Ethereum network.

  2. Add the following dependencies to Maven to start using Web3J:
// Java 8<dependency>
  <groupId>org.web3j</groupId>
  <artifactId>core</artifactId>
  <version>3.3.1</version>
</dependency>// Android<dependency>
  <groupId>org.web3j</groupId>
  <artifactId>core</artifactId>
  <version>3.3.1-android</version>
</dependency>
  1. If you are using Gradle, then use the following methods:
// Java 8compile ('org.web3j:core:3.3.1')// Androidcompile ('org.web3j:core:3.3.1-android')
  1. To connect to a node and initialize an object, use Web3J.build. It defaults to localhost:8545 and can be changed:
Web3j web3 = Web3j.build(new HttpService()); 
  1. To send ...
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Publisher Resources

ISBN: 9781789133998Supplemental Content