Sample Maven project showing how to generate Java classes from a smart contract written in Solidity.
Confirm prerequisites by running a version test using this command line before continuing:
mvn -version
Apache Maven 3.5.2 (138edd61fd100ec658bfa2d307c43b76940a5d7d; 2017-10-18T09:58:13+02:00)
Maven home: /usr/local/Cellar/maven/3.5.2/libexec
Java version: 1.8.0_162, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_162.jdk/Contents/Home/jre
Default locale: en_GB, platform encoding: UTF-8
OS name: "mac os x", version: "10.13.4", arch: "x86_64", family: "mac"
- Edit the pom.xml setting the artifactId and version to values of your choice:
<artifactId>mycontract</artifactId>
<version>1.0</version>- Copy one or more valid solidity contract files to src/main/resources
- Run the script/bat file buildjar.sh
Once the process is complete you will find a Java archive (.jar) file containing the classes generated from the transpilation of the solidity contracts in ./target The name of the file will be comprised of the artifactId and version given above:
mycontract-1.0.jar
Old version of solc installed? If your solidity compilation is failing with errors that suggest it's using an older version of solidity compiler than specified in you .sol file(s), check the version of solc installed:
solc --version
solc, the solidity compiler commandline interface
Version: 0.4.20+commit.3155dd80.Darwin.appleclangIf required, upgrade it:
brew upgrade solidity