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"github.com/hyperledger/fabric/core/chaincode/shim"

return nil, nil

var err error
err = stub.PutState(key, []byte(value))

if err == nil {
    return shim.Error(err.Error())
} 


return shim.Success(nil)   

var key string
if len(args) != 1{
	return nil, err
}

key = args[0]

valInBytes, err := stub.GetState(key)

if err != nil {
    return nil, errors.New("Failed to get state for " + key)
}

message := "State for "  + key + " = " + string(valInBytes)

return []byte(message), nil;

	/* 通道名称 */
	String channelName = "mychannel";

	/* 智能合约配置信息 */
	String chaincodeName = "hashstore1";
	String chaincodeVersion = "1.0";
	String chaincodePath = "github.com/testchaincode";
	ChaincodeID chaincodeID = ChaincodeID.newBuilder().setName(chaincodeName).setVersion(chaincodeVersion).setPath(chaincodePath).build();

	System.out.println("1---start");

	// 1. 初始化客户端
	String mspPath = "crypto-config/peerOrganizations/org1.example.com/users/[email protected]/msp/";
	BuildClientDTO buildClientDTO = new BuildClientDTO.Builder()
			.name("org1.example.com").mspId("Org1MSP").mspPath(mspPath).build();
	HFClient client = ApiHandler.clientBuild(buildClientDTO);

	System.out.println("1---end---2---start");

	// 2. 定义peer
	Collection<PeerNodeDTO> peerNodeDTOS = new ArrayList<>();
	peerNodeDTOS.add(new PeerNodeDTO(PEER0_ORG1_NAME, PEER0_ORG1_GRPC_URL, PEER0_ORG1_EVENT_URL));

	System.out.println("2---end---3---start");

	// 3. 安装智能合约
	InstallCCDTO installCCDTO = new InstallCCDTO.Builder().chaincodeID(chaincodeID).chaincodeSourceLocation(cxtPath + "chaincodes/sample").peerNodeDTOS(peerNodeDTOS).build();
	ApiHandler.installChainCode(client, installCCDTO);

	System.out.println("3---end---4---start");

	// 4 创建通道
	Channel channel = ApiHandler.createChannel(client, channelName);

	System.out.println("4---end---5---start");

	// 5. 测试智能合约invoke
	ExecuteCCDTO invokeCCDTO = new ExecuteCCDTO.Builder().funcName("invoke").params(new String[] {"hn", "haonan"}).chaincodeID(chaincodeID).build();
	ApiHandler.invokeChainCode(client, channel, invokeCCDTO);

	System.out.println("5---end---6---start");

	// 5. 测试智能合约query
	ExecuteCCDTO invokeCCDTO1 = new ExecuteCCDTO.Builder().funcName("query").params(new String[] {"hn"}).chaincodeID(chaincodeID).build();
	ApiHandler.queryChainCode(client, channel, invokeCCDTO1);
	System.out.println("6---end");
}