Generated Java code does not compile (symbol LinkReference does not exist)

[monperrus]

Steps To Reproduce

Generate Java wrappers from Solidity with 4.11.1

Expected behavior

The generated Java code compiles

Actual behavior

The generated Java code does not compile

IOracle.java:117:51
java: cannot find symbol
  symbol:   class LinkReference
  location: class org.web3j.tx.Contract

Environment

Web3j version: 4.11.1

Additional context

This works in 4.11.0. The bug was likely introduced in #1988

[NickSneo]

This has been fixed in latest release, plz check - https://github.com/hyperledger/web3j/releases/tag/v4.11.3

[nherbaut]

I still face the same issue with v4.11.3

[NickSneo]

@nherbaut What is the solidity code, and what generated Java code?

[nherbaut]

SimpleStorage.sol

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

contract SimpleStorage {
    string private storedData;

    // Function to set the string
    function set(string memory x) public {
        storedData = x;
    }

    // Function to get the string
    function get() public view returns (string memory) {
        return storedData;
    }
}

SimpleStorage.java

package com.zuehlke.blockchain.model;

import java.math.BigInteger;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.web3j.abi.TypeReference;
import org.web3j.abi.datatypes.Function;
import org.web3j.abi.datatypes.Type;
import org.web3j.abi.datatypes.Utf8String;
import org.web3j.crypto.Credentials;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.core.RemoteCall;
import org.web3j.protocol.core.RemoteFunctionCall;
import org.web3j.protocol.core.methods.response.TransactionReceipt;
import org.web3j.tx.Contract;
import org.web3j.tx.TransactionManager;
import org.web3j.tx.gas.ContractGasProvider;

/**
 * <p>Auto generated code.
 * <p><strong>Do not modify!</strong>
 * <p>Please use the <a href="https://docs.web3j.io/command_line.html">web3j command line tools</a>,
 * or the org.web3j.codegen.SolidityFunctionWrapperGenerator in the 
 * <a href="https://github.com/web3j/web3j/tree/main/codegen">codegen module</a> to update.
 *
 * <p>Generated with web3j version 4.11.3.
 */
@SuppressWarnings("rawtypes")
public class SimpleStorage extends Contract {
    public static final String BINARY = "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";

    private static String librariesLinkedBinary;

    public static final String FUNC_GET = "get";

    public static final String FUNC_SET = "set";

    @Deprecated
    protected SimpleStorage(String contractAddress, Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
        super(BINARY, contractAddress, web3j, credentials, gasPrice, gasLimit);
    }

    protected SimpleStorage(String contractAddress, Web3j web3j, Credentials credentials, ContractGasProvider contractGasProvider) {
        super(BINARY, contractAddress, web3j, credentials, contractGasProvider);
    }

    @Deprecated
    protected SimpleStorage(String contractAddress, Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
        super(BINARY, contractAddress, web3j, transactionManager, gasPrice, gasLimit);
    }

    protected SimpleStorage(String contractAddress, Web3j web3j, TransactionManager transactionManager, ContractGasProvider contractGasProvider) {
        super(BINARY, contractAddress, web3j, transactionManager, contractGasProvider);
    }

    public RemoteFunctionCall<String> get() {
        final Function function = new Function(FUNC_GET, 
                Arrays.<Type>asList(), 
                Arrays.<TypeReference<?>>asList(new TypeReference<Utf8String>() {}));
        return executeRemoteCallSingleValueReturn(function, String.class);
    }

    public RemoteFunctionCall<TransactionReceipt> set(String x) {
        final Function function = new Function(
                FUNC_SET, 
                Arrays.<Type>asList(new org.web3j.abi.datatypes.Utf8String(x)), 
                Collections.<TypeReference<?>>emptyList());
        return executeRemoteCallTransaction(function);
    }

    @Deprecated
    public static SimpleStorage load(String contractAddress, Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
        return new SimpleStorage(contractAddress, web3j, credentials, gasPrice, gasLimit);
    }

    @Deprecated
    public static SimpleStorage load(String contractAddress, Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
        return new SimpleStorage(contractAddress, web3j, transactionManager, gasPrice, gasLimit);
    }

    public static SimpleStorage load(String contractAddress, Web3j web3j, Credentials credentials, ContractGasProvider contractGasProvider) {
        return new SimpleStorage(contractAddress, web3j, credentials, contractGasProvider);
    }

    public static SimpleStorage load(String contractAddress, Web3j web3j, TransactionManager transactionManager, ContractGasProvider contractGasProvider) {
        return new SimpleStorage(contractAddress, web3j, transactionManager, contractGasProvider);
    }

    public static RemoteCall<SimpleStorage> deploy(Web3j web3j, Credentials credentials, ContractGasProvider contractGasProvider) {
        return deployRemoteCall(SimpleStorage.class, web3j, credentials, contractGasProvider, getDeploymentBinary(), "");
    }

    @Deprecated
    public static RemoteCall<SimpleStorage> deploy(Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
        return deployRemoteCall(SimpleStorage.class, web3j, credentials, gasPrice, gasLimit, getDeploymentBinary(), "");
    }

    public static RemoteCall<SimpleStorage> deploy(Web3j web3j, TransactionManager transactionManager, ContractGasProvider contractGasProvider) {
        return deployRemoteCall(SimpleStorage.class, web3j, transactionManager, contractGasProvider, getDeploymentBinary(), "");
    }

    @Deprecated
    public static RemoteCall<SimpleStorage> deploy(Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
        return deployRemoteCall(SimpleStorage.class, web3j, transactionManager, gasPrice, gasLimit, getDeploymentBinary(), "");
    }

    public static void linkLibraries(List<Contract.LinkReference> references) {
        librariesLinkedBinary = linkBinaryWithReferences(BINARY, references);
    }

    private static String getDeploymentBinary() {
        if (librariesLinkedBinary != null) {
            return librariesLinkedBinary;
        } else {
            return BINARY;
        }
    }
}

error is

java: cannot find symbol
  symbol:   class LinkReference
  location: class org.web3j.tx.Contract

  <plugin>
        <groupId>org.web3j</groupId>
        <artifactId>web3j-maven-plugin</artifactId>
        <version>4.11.3</version>

[nherbaut]

and that's the java code generated with 4.11.0, that compiles and work

package com.zuehlke.blockchain.model;

import java.math.BigInteger;
import java.util.Arrays;
import java.util.Collections;
import org.web3j.abi.TypeReference;
import org.web3j.abi.datatypes.Function;
import org.web3j.abi.datatypes.Type;
import org.web3j.abi.datatypes.Utf8String;
import org.web3j.crypto.Credentials;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.core.RemoteCall;
import org.web3j.protocol.core.RemoteFunctionCall;
import org.web3j.protocol.core.methods.response.TransactionReceipt;
import org.web3j.tx.Contract;
import org.web3j.tx.TransactionManager;
import org.web3j.tx.gas.ContractGasProvider;

/**
 * <p>Auto generated code.
 * <p><strong>Do not modify!</strong>
 * <p>Please use the <a href="https://docs.web3j.io/command_line.html">web3j command line tools</a>,
 * or the org.web3j.codegen.SolidityFunctionWrapperGenerator in the 
 * <a href="https://github.com/web3j/web3j/tree/master/codegen">codegen module</a> to update.
 *
 * <p>Generated with web3j version 4.11.0.
 */
@SuppressWarnings("rawtypes")
public class SimpleStorage extends Contract {
    public static final String BINARY = "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";

    public static final String FUNC_GET = "get";

    public static final String FUNC_SET = "set";

    @Deprecated
    protected SimpleStorage(String contractAddress, Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
        super(BINARY, contractAddress, web3j, credentials, gasPrice, gasLimit);
    }

    protected SimpleStorage(String contractAddress, Web3j web3j, Credentials credentials, ContractGasProvider contractGasProvider) {
        super(BINARY, contractAddress, web3j, credentials, contractGasProvider);
    }

    @Deprecated
    protected SimpleStorage(String contractAddress, Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
        super(BINARY, contractAddress, web3j, transactionManager, gasPrice, gasLimit);
    }

    protected SimpleStorage(String contractAddress, Web3j web3j, TransactionManager transactionManager, ContractGasProvider contractGasProvider) {
        super(BINARY, contractAddress, web3j, transactionManager, contractGasProvider);
    }

    public RemoteFunctionCall<String> get() {
        final Function function = new Function(FUNC_GET, 
                Arrays.<Type>asList(), 
                Arrays.<TypeReference<?>>asList(new TypeReference<Utf8String>() {}));
        return executeRemoteCallSingleValueReturn(function, String.class);
    }

    public RemoteFunctionCall<TransactionReceipt> set(String x) {
        final Function function = new Function(
                FUNC_SET, 
                Arrays.<Type>asList(new org.web3j.abi.datatypes.Utf8String(x)), 
                Collections.<TypeReference<?>>emptyList());
        return executeRemoteCallTransaction(function);
    }

    @Deprecated
    public static SimpleStorage load(String contractAddress, Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
        return new SimpleStorage(contractAddress, web3j, credentials, gasPrice, gasLimit);
    }

    @Deprecated
    public static SimpleStorage load(String contractAddress, Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
        return new SimpleStorage(contractAddress, web3j, transactionManager, gasPrice, gasLimit);
    }

    public static SimpleStorage load(String contractAddress, Web3j web3j, Credentials credentials, ContractGasProvider contractGasProvider) {
        return new SimpleStorage(contractAddress, web3j, credentials, contractGasProvider);
    }

    public static SimpleStorage load(String contractAddress, Web3j web3j, TransactionManager transactionManager, ContractGasProvider contractGasProvider) {
        return new SimpleStorage(contractAddress, web3j, transactionManager, contractGasProvider);
    }

    public static RemoteCall<SimpleStorage> deploy(Web3j web3j, Credentials credentials, ContractGasProvider contractGasProvider) {
        return deployRemoteCall(SimpleStorage.class, web3j, credentials, contractGasProvider, BINARY, "");
    }

    @Deprecated
    public static RemoteCall<SimpleStorage> deploy(Web3j web3j, Credentials credentials, BigInteger gasPrice, BigInteger gasLimit) {
        return deployRemoteCall(SimpleStorage.class, web3j, credentials, gasPrice, gasLimit, BINARY, "");
    }

    public static RemoteCall<SimpleStorage> deploy(Web3j web3j, TransactionManager transactionManager, ContractGasProvider contractGasProvider) {
        return deployRemoteCall(SimpleStorage.class, web3j, transactionManager, contractGasProvider, BINARY, "");
    }

    @Deprecated
    public static RemoteCall<SimpleStorage> deploy(Web3j web3j, TransactionManager transactionManager, BigInteger gasPrice, BigInteger gasLimit) {
        return deployRemoteCall(SimpleStorage.class, web3j, transactionManager, gasPrice, gasLimit, BINARY, "");
    }
}

  <plugin>
        <groupId>org.web3j</groupId>
        <artifactId>web3j-maven-plugin</artifactId>
        <version>4.11.0</version>

[nherbaut]

@NickSneo do you need more info?

[NickSneo]

Hey @nherbaut , thanks for the contracts let me reproduce the issues. Apologies for late reply, was stuck in other high priority task.

[tonykwok1992]

you generate solidity java wrapper using 4.11.3 / 4.11.0. But do you use this version or above to compile your java code?
Here is the class that your compiler's complaining:
https://github.com/hyperledger/web3j/blob/main/core/src/main/java/org/web3j/tx/Contract.java#L492

[rohandakua]

@nherbaut how are you generating the wrapper class , could you elaborate , i am generating it through web3j-cli and it is generating in version 1.6.something , and I am facing the same issue as yours . Please tell me how are you generating this ? I am creating android app using kotlin and i have added the following dependencies
implementation ("org.web3j:core:4.9.4")

[rohandakua]

@monperrus use 4.12.1 . use cli version 1.6.1 to generate the wrapper class , and use implementation of 4.12.1 and it would work