源码传送门

2021 年了没有可以直接复制粘贴用fabric 2.2.x 简单代码？那就自己写，并且分享一下偷懒configtx.yaml配置，首先确保你搭建的联盟链channel的配置是这个样子，

这个配置文件名字叫 configtx.yaml

################################################################################
#
#   CHANNEL
#
#   This section defines the values to encode into a config transaction or
#   genesis block for channel related parameters.
#
################################################################################
Channel: &ChannelDefaults
    # Policies defines the set of policies at this level of the config tree
    # For Channel policies, their canonical path is
    #   /Channel/<PolicyName>
    Policies:
        # Who may invoke the 'Deliver' API
        Readers:
            Type: ImplicitMeta
            Rule: "ANY Readers"
        # Who may invoke the 'Broadcast' API
        Writers:
            Type: ImplicitMeta
            Rule: "ANY Writers"
        # By default, who may modify elements at this config level
        Admins:
            Type: ImplicitMeta
            Rule: "ANY Admins" # 这点很重要，只有这样你安装链码单节点审批就行了,建议全部偷懒全部ANY ，只要有Admin签名就行

    # Capabilities describes the channel level capabilities, see the
    # dedicated Capabilities section elsewhere in this file for a full
    # description
    Capabilities:
        <<: *ChannelCapabilities

搭建联盟链这种有其他简单教程，这里不再赘述。

直接贴代码分析一下，看注释就行了

 

    @Test
    void channelConfig() throws Exception {
　　　　
　　　　 // 这是路径，就是fabric加密材料的地方，默认读取的路径自己会拼接crypto-config
　　　　 String cryptoConfig = "/home/ct/Workspace/onekey/outdir";

        // OrgManage  om = new OrgManage("","example.com");
        OrgManage om = new OrgManage(cryptoConfig, "example.com");
        om.initHFClient();
        //Peer peer =; 选择一个你要使用的用户
        OrgManage.UserContext user = om.newUser("Admin", "Org1MSP", "org1");
        om.hfClientAddUser(user);
        om.initChannel("mychannel");
        om.channelAddOrderer(om.newOrderer("orderer", "orderer.example.com", "7050"));

        om.channelAddPeer(om.newPeer("peer0", "org1", "peer0.org1.example.com", "7051"));
        om.build();
        Channel channel = om.getChannel();
        HFClient hfClient = om.getHfClient();  // 到这里就创建好 channel 客户端和 HFClient 客户端了

        byte[] configPB = channel.getChannelConfigurationBytes(); // 获取channel配置

        // configPB 写入文件检测
        InputStream isConfigPb = new ByteArrayInputStream(configPB);
        InUtils.writeStream(isConfigPb,"/home/ct/Workspace/java/sdk2x/src/test/fix/config.pb");

        // 添加的新组织
        String orgMSP = "Org4MSP";
        // 实例化Forest配置对象
        ForestConfiguration configuration = ForestConfiguration.configuration();

        // 通过Forest配置对象实例化Forest请求接口
        ConfigtxlatorClient myClient = configuration.createInstance(ConfigtxlatorClient.class);


        // 调用Forest请求接口，并获取响应返回结果 这里使用 Configtxlator 解析 PB 文件
        JSONObject configJson = myClient.decodeCommonConfig("47.105.36.27:7059", configPB, "c.pb");

        // 需要获取的数据
        byte[] jsonByte = configJson.toString().getBytes();

        InputStream inputStream = new ByteArrayInputStream(jsonByte);

        // 写入文件
        InUtils.writeStream(inputStream, "/home/ct/Workspace/java/sdk2x/src/test/fix/config2.json");

        // 读取 org.json ， 这个文件是通过脚本生成，可以去看源码 doc 里面的脚本，就是生成的组织4的加密材料和 configtx.yaml 文件通过
　　　　 // configtxgen -printOrg Org3MSP > ./org3.json 源码里有如何生成 configtx.yaml 的摸板

        JSONObject orgJson = readJson("/home/ct/Workspace/java/sdk2x/src/test/fix/org4.json");

        // 文件进行拼接产生新的 modifiedConfig
        String modifiedConfigStr = configJson.toJSONString();
        // jq -s '.[0] * {"channel_group":{"groups":{"Application":{"groups": {"Org3MSP":.[1]}}}}}' config.json ../channel-artifacts/org3.json > modified_config.json
        JSONObject modifiedConfig = JSONObject.parseObject(modifiedConfigStr);
        modifiedConfig.getJSONObject("channel_group").getJSONObject("groups").getJSONObject("Application").getJSONObject("groups").put(orgMSP,orgJson);

        // 把 modifiedConfig 写入文件检测是否写入
        modifiedConfigStr = modifiedConfig.toString();
        InUtils.writeStream("/home/ct/Workspace/java/sdk2x/src/test/fix/modified_config.json",modifiedConfigStr);

        // 把 modifiedConfig 转换成 ProtoBuffer 文件
        byte[] modifiedConfigJsonPB = myClient.encodeCommonConfig("47.105.36.27:7059", modifiedConfigStr.getBytes(), "c.pb");

        // 写入文件检测
        InputStream isModifiedConfigJsonPB = new ByteArrayInputStream(modifiedConfigJsonPB);
        InUtils.writeStream(isModifiedConfigJsonPB,"/home/ct/Workspace/java/sdk2x/src/test/fix/modified_config.pb");

        ConfigtxlatorHttpClient configtxlatorHttpClient = new ConfigtxlatorHttpClient();

        String channelName = "mychannel";

        // org4_update.pb
        byte[] orgUpdatePb =  configtxlatorHttpClient.computeUpdate("47.105.36.27:7059",channelName,configPB,modifiedConfigJsonPB);

        InUtils.writeStream(new ByteArrayInputStream(orgUpdatePb),"/home/ct/Workspace/java/sdk2x/src/test/fix/org4_update.pb");

        // 创建 update -f org3_update_in_envelope.pb
        UpdateChannelConfiguration updateChannelConfiguration = new UpdateChannelConfiguration(orgUpdatePb);

        // 创建 OrdererMSP 用户 ， 实际生产自己肯定没有保存这么多证书，可以通过 p2p 网络发过来 Signature 而不是证书
        OrgManage.UserContext ordererAdmin = om.newUser("Admin", "OrdererMSP");
        // 创建 adminOrg2
        OrgManage.UserContext adminOrg2 = om.newUser("Admin", "Org2MSP", "org2");
        // 创建 adminOrg3
        OrgManage.UserContext adminOrg3 = om.newUser("Admin", "Org3MSP", "org3");
        // 提交签名，这里确实会自己添加头部 '{"payload":{"header":{"channel_header":{"channel_id":...
　　　　 // 超过半数签名
        channel.updateChannelConfiguration(updateChannelConfiguration,
                hfClient.getUpdateChannelConfigurationSignature(updateChannelConfiguration,ordererAdmin),
              //  hfClient.getUpdateChannelConfigurationSignature(updateChannelConfiguration,user),
                hfClient.getUpdateChannelConfigurationSignature(updateChannelConfiguration,adminOrg2),
                hfClient.getUpdateChannelConfigurationSignature(updateChannelConfiguration,adminOrg3));

        byte[] configPBNew = channel.getChannelConfigurationBytes();

        // configPB 写入文件检测
        InputStream isConfigPbNew = new ByteArrayInputStream(configPBNew);
        InUtils.writeStream(isConfigPbNew,"/home/ct/Workspace/java/sdk2x/src/test/fix/configAddOrg4.pb");
    }

 详细代码直接去源码test里找就好了