你好，有没有往fabric存储字符串的例子，我自己写了一个能帮检查错误吗？

智能合约 package main

import ( "errors" "fmt"

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

)

type SaveState1Chaincode struct { }

func (t *SaveState1Chaincode) init(stub shim.ChaincodeStubInterface, args []string) ([]byte, error) { fmt.Printf("Init called with function %s!\n", function)

return nil, nil

}

func (t *SaveState1Chaincode) invoke(stub shim.ChaincodeStubInterface, args []string) pb.Response { var key, value string if len(args) != 2 { return shim.Error("Incorrect number of arguments. Expecting 2") } key = args[0] value = args[1]

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

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

return shim.Success(nil)

}

func (t *SaveState1Chaincode) query(stub shim.ChaincodeStubInterface, args []string) ([]byte, error) {

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;

}

func main() { err := shim.Start(new(SaveState1Chaincode)) if err != nil { fmt.Printf("Error starting Save State chaincode: %s", err) } } java代码 package com.hyperledger.fabric.sdk.handler;

import static com.hyperledger.fabric.sdk.common.Config.PEER0_ORG1_EVENT_URL; import static com.hyperledger.fabric.sdk.common.Config.PEER0_ORG1_GRPC_URL; import static com.hyperledger.fabric.sdk.common.Config.PEER0_ORG1_NAME;

import java.util.ArrayList; import java.util.Collection;

import org.hyperledger.fabric.sdk.ChaincodeID; import org.hyperledger.fabric.sdk.Channel; import org.hyperledger.fabric.sdk.HFClient;

import com.hyperledger.fabric.sdk.entity.dto.api.BuildClientDTO; import com.hyperledger.fabric.sdk.entity.dto.api.ExecuteCCDTO; import com.hyperledger.fabric.sdk.entity.dto.api.InstallCCDTO; import com.hyperledger.fabric.sdk.entity.dto.api.PeerNodeDTO;

public class Installchaincode { public static void main(String[] args) throws Exception { String cxtPath = APITest.class.getClassLoader().getResource("").getPath();

    /* 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/Admin@org1.example.com/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");
}

} 是在你写的例子基础上我自己书写的一个类。如果可以最好给我个例子看一下。

AnswerAIL / fabric-sdk-server

你好，有没有往fabric存储字符串的例子，我自己写了一个能帮检查错误吗？ #7