遇到了调用chaincode时的问题，可能是由于使用了go gateway sdk引起的

在IT行业这个发展更新速度很快的行业，只有不停止的学习，才不会被行业所淘汰。如果你是Golang学习者，那么本文《遇到了调用chaincode时的问题，可能是由于使用了go gateway sdk引起的》就很适合你！本篇内容主要包括##content_title##，希望对大家的知识积累有所帮助，助力实战开发！

当我尝试使用网关 sdk 通过 go 应用程序调用链代码时，我一直面临这个问题。链代码已成功安装在对等点上并通过 cli 运行，但在尝试使用应用程序调用链代码时出现以下错误：

[fabsdk/client] 2022/03/10 09:27:55 utc - invoke.(*selectandendorsehandler).handle -> warn error getting additional endorsers: error getting additional endorsers: error getting channel response for channel [mychannel]: discovery status code: (11) unknown. description: error received from discovery server: failed constructing descriptor for chaincodes:

我能够使用 cli 创建并使用应用程序进行查询，但无法提交任何交易。

与此合约一起安装的示例 fabcar 链代码与启用了发现功能的 nodejs 应用程序配合良好。这可能与我们的链码的私有数据有关？

我可以确认在本地使用测试网络时这工作正常，但是我尝试在 kubernetes 部署的网络上运行它，将链码作为外部服务运行。

从有关此问题的其他帖子看来，可能是锚点设置不正确。我已将更新的锚点推送到频道。如果不是，那么 fabcar 应用程序也无法运行吗？

go 应用程序代码：

package main

import (
    "fmt"
    "io/ioutil"
    "log"
    "net/http"
    "os"
    "path/filepath"

    "github.com/gorilla/mux"
    "github.com/hyperledger/fabric-sdk-go/pkg/core/config"
    "github.com/hyperledger/fabric-sdk-go/pkg/gateway"
)

type networkhandler struct {
    contrac *gateway.contract
}

var (
    ccppath      = os.getenv("ccp_path")
    credpath     = os.getenv("cred_path")
    mspid        = os.getenv("msp_id")
    channelname  = os.getenv("channel_name")
    contractname = os.getenv("contract_name")
)

func main() {
    r := mux.newrouter()

    log.println("====les a go====")

    err := os.setenv("discovery_as_localhost", "false")
    if err != nil {
        log.fatalf("error setting discovery_as_localhost environment vairblae %v", err)
    }

    wallet, err := gateway.newfilesystemwallet("wallet")
    if err != nil {
        log.fatalf("failed to create wallet: %v", err)
    }

    if !wallet.exists("appuser") {
        err = populatewallet(wallet)
        if err != nil {
            log.fatalf("failed to populate wallet contents: %v", err)
        }
    }

    //location of connection profile for org1

    gw, err := gateway.connect(
        gateway.withconfig(config.fromfile(filepath.clean(ccppath))),
        gateway.withidentity(wallet, "appuser"),
    )

    if err != nil {
        log.fatalf("failed to connect to gateway: %v", err)
    }

    defer gw.close()

    network, err := gw.getnetwork(channelname)
    if err != nil {
        log.fatalf("failed to get network: %v", err)
    }

    contract := network.getcontract(contractname)
    /*
        log.println("--> submit: initledger")
        results, err := contract.submittransaction("initledger")
        if err != nil {
            log.fatalf("failed to submit transaction: %v", err)
        }
        log.println(string(results))
    */
    log.println("started")
    testn := networkhandler{contrac: contract}

    r.handlefunc("/getallorgvisit", testn.getallorgvisit)

    r.handlefunc("/readprivateproperties/{id}", testn.readprivateproperties)
    r.handlefunc("/readprivatepublicasset/{id}", testn.readprivatepublicproperties)

    r.handlefunc("/verifyassetproperties", testn.verifyassetproperties).methods("post")

    r.handlefunc("/createprivate", testn.createprivate).methods("post")

    r.handlefunc("/changedescription", testn.changedescription).methods("put")

    log.fatal(http.listenandserve(":1234", r))
    //log.println("==== application-golang ends ====")
}

func populatewallet(wallet *gateway.wallet) error {
    log.println("populate wallet")

    certpath := filepath.join(credpath, "signcerts", "cert.pem")
    // reads the certificate pem
    cert, err := ioutil.readfile(filepath.clean(certpath))
    if err != nil {
        return err
    }

    keydir := filepath.join(credpath, "keystore")

    files, err := ioutil.readdir(keydir)

    if err != nil {
        return err
    }

    if len(files) != 1 {
        return fmt.errorf("keystore folder should have contain one file")
    }
    keypath := filepath.join(keydir, files[0].name())
    key, err := ioutil.readfile(filepath.clean(keypath))
    if err != nil {
        return err
    }
    identity := gateway.newx509identity(mspid, string(cert), string(key))

    return wallet.put("appuser", identity)
}

编辑：连接配置文件 json

{
    "name": "test-network-org1",
    "version": "1.0.0",
    "client": {
        "organization": "org1",
        "connection": {
            "timeout": {
                "peer": {
                    "endorser": "300"
                }
            }
        }
    },
    "organizations": {
        "org1": {
            "mspid": "org1msp",
            "peers": [
                "peer0-org1"
            ],
            "certificateauthorities": [
                "ca-org1"
            ]
        }
    },
    "peers": {
        "peer0-org1": {
            "url": "grpcs://peer0-org1:7051",
            "tlscacerts": {
                "pem": "-----begin certificate-----\nmiicgtccab+gawibagiuaioln7jnumebcck1ilswoqdk5/ywcgyikozizj0eawiw\natelmakga1uebhmcvvmxetapbgnvbagtce5ldybzb3jrmrewdwydvqqhewhozxcg\nww9yazeqma4ga1uechmhy2etb3jnmteqma4ga1uecxmhy2etb3jnmteqma4ga1ue\naxmhy2etb3jnmtaefw0ymjazmtawnju0mdbafw0znzazmdywnju0mdbamgkxczaj\nbgnvbaytalvtmrewdwydvqqiewhozxcgww9yazerma8ga1uebxmitmv3iflvcmsx\nedaobgnvbaotb2nhlw9yzzexedaobgnvbastb2nhlw9yzzexedaobgnvbamtb2nh\nlw9yzzewwtatbgcqhkjopqibbggqhkjopqmbbwncaar+fxbhya/ygmidixzz7x03\nmr0fu8dm/cs57b9yqzbr43g3vi5e/80gdvtyiglmj3d3w19eyxliytvuonzou7ft\no0uwqzaobgnvhq8baf8ebamcaqywegydvr0taqh/bagwbgeb/wibatadbgnvhq4e\nfgqu2z+hwysxaffkg8kjwo1qjgjg2mqwcgyikozizj0eawidsaawrqihapozxwf/\np93/69jdvn4csszu58pa+8askgxhmice/ahoaibrbbmnrrxb/ohxzzygeubope5j\nqmwvwflb/duihjtlyw==\n-----end certificate-----\n"
            },
            "grpcoptions": {
                "ssl-target-name-override": "peer0-org1",
                "hostnameoverride": "peer0-org1"
            }
        }
    },
    "certificateauthorities": {
        "ca-org1": {
            "url": "https://ca-org1:7054",
            "caname": "ca-org1",
            "tlscacerts": {
                "pem": ["-----begin certificate-----\nmiicgtccab+gawibagiuaioln7jnumebcck1ilswoqdk5/ywcgyikozizj0eawiw\natelmakga1uebhmcvvmxetapbgnvbagtce5ldybzb3jrmrewdwydvqqhewhozxcg\nww9yazeqma4ga1uechmhy2etb3jnmteqma4ga1uecxmhy2etb3jnmteqma4ga1ue\naxmhy2etb3jnmtaefw0ymjazmtawnju0mdbafw0znzazmdywnju0mdbamgkxczaj\nbgnvbaytalvtmrewdwydvqqiewhozxcgww9yazerma8ga1uebxmitmv3iflvcmsx\nedaobgnvbaotb2nhlw9yzzexedaobgnvbastb2nhlw9yzzexedaobgnvbamtb2nh\nlw9yzzewwtatbgcqhkjopqibbggqhkjopqmbbwncaar+fxbhya/ygmidixzz7x03\nmr0fu8dm/cs57b9yqzbr43g3vi5e/80gdvtyiglmj3d3w19eyxliytvuonzou7ft\no0uwqzaobgnvhq8baf8ebamcaqywegydvr0taqh/bagwbgeb/wibatadbgnvhq4e\nfgqu2z+hwysxaffkg8kjwo1qjgjg2mqwcgyikozizj0eawidsaawrqihapozxwf/\np93/69jdvn4csszu58pa+8askgxhmice/ahoaibrbbmnrrxb/ohxzzygeubope5j\nqmwvwflb/duihjtlyw==\n-----end certificate-----\n"]
            },
            "httpoptions": {
                "verify": false
            }
        }
    }
}

编辑：发现 cli 输出

[
        {
                "MSPID": "Org1MSP",
                "Endpoint": "peer0-org1:7051",
                "Identity": "-----BEGIN CERTIFICATE-----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\n573Do+OO8h5mJQ5iRnKlXo7kqg==\n-----END CERTIFICATE-----\n"
        },
        {
                "MSPID": "Org2MSP",
                "Endpoint": "peer0-org2:7051",
                "Identity": "-----BEGIN CERTIFICATE-----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\n6rGzdA5iyc2zll9/g6fz9jRQUw==\n-----END CERTIFICATE-----\n"
        },
        {
                "MSPID": "Org3MSP",
                "Endpoint": "peer0-org3:7051",
                "Identity": "-----BEGIN CERTIFICATE-----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\nSiR6Ln7ZK3ErpS8tebuxPruX\n-----END CERTIFICATE-----\n"
        }
]

正确答案

确保您运行的是 Fabric 2.4 及更高版本。

Fabric 2.4 中隐式收集支持仅为 implemented。

文中关于的知识介绍，希望对你的学习有所帮助！若是受益匪浅，那就动动鼠标收藏这篇《遇到了调用chaincode时的问题，可能是由于使用了go gateway sdk引起的》文章吧，也可关注golang学习网公众号了解相关技术文章。