Web3j 4.5.16 Solc 0.6.4 - View functions return TransactionReceipt

[dfsantamaria]

I'm using Web3j 4.5.16, Solc 0.6.4, and web3j-maven-plugin 4.5.11 on a netbeans project. Consider the example below: pragma solidity ^0.6.4; contract test { string private amsg; constructor(string memory message) public { amsg=message; } function hello() public view returns(string memory _m) { return amsg; } } In java wrapper class "hello" returns a TransactionReceipt object, and this happens with any view function, even if, from https://github.com/web3j/web3j/issues/1161 the issue seems solved.

The second point is: why binary data in field Binary is different from the one generated by solc.?

[dfsantamaria]

From console, it works. But it doesn't work from maven. The pom I'm using is available here

[magooster]

I have the same issue with the gradle plugin... It seems the gradle plugin uses web3j version 4.5.11 and I can't seem to override.

For Maven you should be able to override the web3 version by adding a dependency block to the plugin block.

[dfsantamaria]

Nope. I've tried to ovverride the dependency with no success.

[magooster]

This should work

<plugin>
                <groupId>org.web3j</groupId>
                <artifactId>web3j-maven-plugin</artifactId>
                <version>${web3j-maven-plugin.version}</version>
                <configuration>
                    <soliditySourceFiles>
                        <directory>src/main/solidity</directory>
                        <includes>
                            <include>*.sol</include>
                        </includes>
                    </soliditySourceFiles>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.web3j</groupId>
                        <artifactId>core</artifactId>
                        <version>4.5.16</version>
                    </dependency>
                    <dependency>
                        <groupId>org.web3j</groupId>
                        <artifactId>codegen</artifactId>
                        <version>4.5.16</version>
                    </dependency>
                </dependencies>
</plugin>

[airvin]

This is also an issue with web3j 4.6.3, web3j-gradle-plugin 4.5.11 and solc 0.7.1. There was a workaround posted in this issue. Adding this to the buildscript of the build.gradle fixes it:

classpath ("org.web3j:codegen:4.6.3") {
    force = true
}

[AlexandrouR]

This is no longer relevant. After testing the contract with the latest web3j version the hello function returns a string.