# Introduction The **contraect-maven-plugin** simplifies interacting with smart contracts on the aeternity blockchain. It generates Java classes out of the sophia contract sourcecode which provide a convenient to deploy a contract on the chain or call a function.\ It also wraps the input and output objects of those function calls - no parsing is necessary. ## Detail description The plugin takes a contract written in sophia language * generates a Java class representing the contract and its methods * initialization of instance can be done using an existing contractId thus the methods of an already deployed contract are then alled * creates a method to deploy the contract * create method for every entrypoint * method will be executed using dryRun - which means it will not be committed and thus included in a block * if method is stateful - transaction will be committed and thus included in a block, it will be wait for confirmation * if method is payable - an additional parameter is available to set the amount to deposit * all input parameters are parsed to typed java classes (if possible) * also the result is parsed to java type (if possible) * in case of errors during dryRun call or committing the tx errors are raised with details from the node ## Limitations * Tuples of size > 10 are not supported and currently not planned. If there's an indiciation, that more is needed, we will get back to this. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://kryptokrauts.gitbook.io/contraect-maven-plugin/master.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.