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【问题分类】

• bug
• P2P网络相关（包含libp2p,liquid）
• 链账户身份与权限相关（证书问题、public、多签投票问题）
• 核心交易引擎相关（交易池、DAG）
• 共识相关
• 智能合约相关
• 存储相关
• [ ✅] SDK相关
• 长安链CMC工具
• 长安链管理台
• 长安链浏览器
• 长安链合约IDE
• 长安链web签名插件
• 跨链相关
• 轻节点相关
• 隐私计算相关
• 密码学相关
• 环境依赖
• 其他补充：

【问题描述】（请对问题进行描述，方便定位问题）

具体的现象，操作步骤，前置条件等，尽可能描述清楚，有截图说明更佳

1. solidty合约如下： // SPDX-License-Identifier: MIT pragma solidity 0.7.5; pragma abicoder v2;

contract IdentityVC { struct Credential { string credentialType; // 凭证类型，如“毕业证” string issuedData; // 发放细节，例如发放机构、地点 bytes32 hash; // 凭证的哈希值 uint256 timestamp; // 存储凭证的时间戳 address issuedBy; // 凭证颁发部门的地址 string additionalData; // 其他附加信息 bool exists; // 凭证是否存在 }

mapping(address => mapping(bytes32 => Credential)) private credentials;
// 用户地址 -> 凭证哈希 -> 凭证结构体

event CredentialIssued(address indexed user, bytes32 indexed credentialHash, string credentialType);
event CredentialVerified(address indexed user, bytes32 indexed credentialHash, bool isValid);

// 1. 可验证凭证生成与存储
function issueCredential(
    address user,
    bytes32 credentialHash,
    string memory credentialType,
    string memory issuedData,
    string memory additionalData
) external {
    require(!credentials[user][credentialHash].exists, "Credential already exists");

    credentials[user][credentialHash] = Credential({
        credentialType: credentialType,
        issuedData: issuedData,
        hash: credentialHash,
        timestamp: block.timestamp,
        issuedBy: msg.sender,
        additionalData: additionalData,
        exists: true
    });

    emit CredentialIssued(user, credentialHash, credentialType);
}

// 2. 凭证验证
function verifyCredential(address user, bytes32 credentialHash) external returns (bool) {
    Credential storage credential = credentials[user][credentialHash];

    // 验证凭证是否存在
    if (credential.exists) {
        emit CredentialVerified(user, credentialHash, true);
        return true;
    } else {
        emit CredentialVerified(user, credentialHash, false);
        return false;
    }
}

// 3. 获取凭证信息
function getCredential(address user, bytes32 credentialHash) external view returns (Credential memory) {
    Credential storage credential = credentials[user][credentialHash];

    require(credential.exists, "Credential does not exist");

    return (credential);
}

} 2.调用方法issueCredential，java代码如下： public static void invokeContract(ChainClient chainClient) { System.out.println("=====================调用合约=============================="); ResultOuterClass.TxResponse responseInfo = null;

    Map<String, byte[]> params = new HashMap<>();
    String addr = "0x1234567890abcdef1234567890abcdef12345678"; // Example Ethereum address
    String credentialType = "Employee ID";
    String issuedData = "Employee of the Year 2023";
    String additionalData = "Issued for outstanding performance";

    // Convert "test" to 32 bytes
    byte[] testBytes = new byte[32];
    System.arraycopy("test".getBytes(), 0, testBytes, 0, "test".length());
    System.out.println(testBytes);

    Function function = new Function(
            "issueCredential",
            Arrays.asList(
                    new Address(addr),
                    new Bytes32(testBytes),
                    new Utf8String(credentialType),
                    new Utf8String(issuedData),
                    new Utf8String(additionalData)
            ),
            Collections.emptyList()
    );
    String methodDataStr = FunctionEncoder.encode(function);
    String method = methodDataStr.substring(0, 10);
    System.out.println(method);
    params.put(CONTRACT_ARGS_EVM_PARAM, methodDataStr.getBytes());


    try {
        responseInfo = chainClient.invokeContract(Utils.calcContractName(CONTRACT_NAME), method,
                null, params, 100000, 100000);
    } catch (Exception e) {
        e.printStackTrace();
    }
    System.out.println("执行合约结果：");
    System.out.println(responseInfo);
    System.out.println("==========================================================");
}

【相关日志文件】（如果有报错日志请贴图，或者上传附件）

【系统信息】（请填写系统信息，方便定位问题）

• chainmaker-java version * : [v2.3.0]