Java Web3j Function 构造 struct array 入参 | 登链社区

10 Java Web3j Function 构造 struct array 入参

我的智能合约方法如图所示，我想要用 Java 的 web3j 调用这个方法，我尝试多种办法去构造 Function 对象，总是报错。以下是我的代码：

List&lt;Uint8> inputParameters = new ArrayList&lt;>();
        inputParameters.add(new Uint8(9));
        inputParameters.add(new Uint8(8));
        inputParameters.add(new Uint8(4));

        Function function = new Function(
                "test1",
                Arrays.asList(new DynamicArray(StaticStruct.class, inputParameters)),
                Collections.&lt;TypeReference&lt;?>>emptyList()
        );

大佬们，这个入参我该如何构造啊，试了好多都是报错，不好使啊，小弟先行谢过了。

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最佳答案 2022-05-09 11:18

应该用staticstruct 去装abc new DynamicArray(StaticStruct.class,List.of(new StaticStruct(a,bc)))

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nono

采纳率 25% | 回答于 2022-05-09 11:00

默认排序时间排序

其它 2 个回答

tengdw 2022-05-09 15:39

tengdw 2022-05-09 12:01

送给你

```java
package com.example.test;

import java.math.BigInteger;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Callable;
import org.web3j.abi.TypeReference;
import org.web3j.abi.datatypes.Function;
import org.web3j.abi.datatypes.Type;
import org.web3j.abi.datatypes.generated.Uint8;
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.tuples.generated.Tuple3;
import org.web3j.tx.Contract;
import org.web3j.tx.TransactionManager;
import org.web3j.tx.gas.ContractGasProvider;

/**
 * Auto generated code.
 * Do not modify!
 * 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.
 *
 * Generated with web3j version 1.4.1.
 */
@SuppressWarnings("rawtypes")
public class Test_sol_MyTest extends Contract {
 public static final String BINARY = "";

public static final String FUNC_MAP1 = "map1";

public static final String FUNC_TEST1 = "test1";

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

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

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

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

public RemoteFunctionCall<Tuple3<BigInteger, BigInteger, BigInteger>> map1(BigInteger param0) {
 final Function function = new Function(FUNC_MAP1, 
 Arrays.<Type>asList(new org.web3j.abi.datatypes.generated.Uint256(param0)), 
 Arrays.<TypeReference<?>>asList(new TypeReference<Uint8>() {}, new TypeReference<Uint8>() {}, new TypeReference<Uint8>() {}));
 return new RemoteFunctionCall<Tuple3<BigInteger, BigInteger, BigInteger>>(function,
 new Callable<Tuple3<BigInteger, BigInteger, BigInteger>>() {
 @Override
 public Tuple3<BigInteger, BigInteger, BigInteger> call() throws Exception {
 List<Type> results = executeCallMultipleValueReturn(function);
 return new Tuple3<BigInteger, BigInteger, BigInteger>(
 (BigInteger) results.get(0).getValue(), 
 (BigInteger) results.get(1).getValue(), 
 (BigInteger) results.get(2).getValue());
 }
 });
 }

public RemoteFunctionCall<TransactionReceipt> test1(List<Demo> demos) {
 final Function function = new Function(
 FUNC_TEST1, 
 Arrays.<Type>asList(new org.web3j.abi.datatypes.DynamicArray<Demo>(
 Demo.class,
 org.web3j.abi.Utils.typeMap(demos, Demo.class))), 
 Collections.<TypeReference<?>>emptyList());
 return executeRemoteCallTransaction(function);
 }

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

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

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

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

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

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

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

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

```