快速带你上手Hyperledger Fabric环境搭建＋开发测试

rzexin
更新于 2020-05-15 14:36
阅读 10618

本文采用virtualbox+vagrant方式搭建Hyperledger Fabric环境，采用VSCode远程开发模式开发调试链码和客户端程序。

# 快速带你上手Hyperledger Fabric环境搭建＋开发测试

*jasonruan 2020.04.20*

# 1 前言

本文采用`virtualbox+vagrant`方式搭建`Hyperledger Fabric`环境，采用`VSCode`远程开发模式开发调试链码和客户端程序。

# 2 环境搭建

## 2.1 搭建虚拟机环境

### 2.1.1 生成配置文件

> 使用版本：Ubuntu 18.04 LTS
>
> 执行以下命令后，将生成`Vagrantfile`配置文件

```bash
$ vagrant init ubuntu/bionic64
```

### 2.1.2 指定虚拟机名称

> 修改`Vagrantfile`配置文件，增加如下内容：

```js
  config.vm.provider "virtualbox" do |v|
      v.name = "js-fabric"
  end
```

### 2.1.3 拉取镜像并启动

> 根据配置文件拉取镜像并创建`Ubuntu18.04`虚拟机

```bash
$ vagrant up
```

> 在`Virtualbox`看到虚拟机已启动

![image.png](https://img.learnblockchain.cn/attachments/2020/05/IVqNNXss5ebe38047f3af.png)

### 2.1.4 登录虚拟机

```bash
(2020-04-14 12:44:40) [jason@RUAN:~/Vagrant/js-fabric]$ vagrant ssh
Welcome to Ubuntu 18.04.4 LTS (GNU/Linux 4.15.0-96-generic x86_64)

vagrant@ubuntu-bionic:~$ 
```

## 2.2 安装依赖工具

### 2.2.1 go

```bash
vagrant@ubuntu-bionic:~/Soft$ wget https://dl.google.com/go/go1.14.2.linux-amd64.tar.gz

vagrant@ubuntu-bionic:~/Soft$ sudo tar -zxvf go1.14.2.linux-amd64.tar.gz -C /opt

vagrant@ubuntu-bionic:~/Soft$ echo "export GOROOT=/opt/go" >> ~/.bashrc
vagrant@ubuntu-bionic:~/Soft$ echo "export GOPATH=/opt/gopath" >> ~/.bashrc
vagrant@ubuntu-bionic:~/Soft$ echo "export PATH=\$GOROOT/bin:\$GOPATH/bin:\$PATH" >>  ~/.bashrc

vagrant@ubuntu-bionic:~/Soft$ . ~/.bashrc

vagrant@ubuntu-bionic:~/Soft$ go version
go version go1.14.2 linux/amd64
```

### 2.2.2 docker

```bash
vagrant@ubuntu-bionic:~/Soft$ curl -fsSL https://get.docker.com -o get-docker.sh
vagrant@ubuntu-bionic:~/Soft$ sudo sh get-docker.sh 
vagrant@ubuntu-bionic:~/Soft$ sudo usermod -aG docker $USER
vagrant@ubuntu-bionic:~/Soft$ sudo systemctl restart docker
vagrant@ubuntu-bionic:~$ docker version
Client: Docker Engine - Community
 Version:           19.03.8
 API version:       1.40
 Go version:        go1.12.17
 Git commit:        afacb8b7f0
 Built:             Wed Mar 11 01:25:46 2020
 OS/Arch:           linux/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.8
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.12.17
  Git commit:       afacb8b7f0
  Built:            Wed Mar 11 01:24:19 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.2.13
  GitCommit:        7ad184331fa3e55e52b890ea95e65ba581ae3429
 runc:
  Version:          1.0.0-rc10
  GitCommit:        dc9208a3303feef5b3839f4323d9beb36df0a9dd
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683
```

### 2.2.3 docker-compose

```bash
vagrant@ubuntu-bionic:~$ sudo curl -L "https://github.com/docker/compose/releases/download/1.25.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

vagrant@ubuntu-bionic:~$ sudo chmod 755 /usr/local/bin/docker-compose

vagrant@ubuntu-bionic:~$ docker-compose --version
docker-compose version 1.25.4, build 8d51620a
```

## 2.3 官方样例部署

> 官方样例：https://github.com/hyperledger/fabric-samples

### 2.3.1 源码及镜像下载

- 下载源码

```bash
vagrant@ubuntu-bionic:~$ mkdir -p $GOPATH/src/github.com/hyperledger
vagrant@ubuntu-bionic:~$ cd $GOPATH/src/github.com/hyperledger
vagrant@ubuntu-bionic:/opt/gopath/src/github.com/hyperledger$ git clone https://github.com/hyperledger/fabric-samples.git
```

- 切换分支

```bash
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples] (master)$ git checkout -b v1.4.6 v1.4.6
Switched to a new branch 'v1.4.6'
```

- 下载引导脚本

```bash
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples] (v1.4.6)$ curl -sS https://raw.githubusercontent.com/hyperledger/fabric/master/scripts/bootstrap.sh -o ./scripts/bootstrap.sh

[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples] (v1.4.6)$ chmod +x scripts/bootstrap.sh
```

- 下载必备二进制文件和docker镜像

```bash
# ./scripts/bootstrap.sh [version] [ca version] [thirdparty_version]
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples] (v1.4.6)$ ./scripts/bootstrap.sh 1.4.6 1.4.6 0.4.18 -s
```

具体流程：
> - 下载Hyperledger Fabric二进制包：
>
> ```
> ===> Downloading version 1.4.6 platform specific fabric binaries
> ===> Downloading:  https://github.com/hyperledger/fabric/releases/download/v1.4.6/hyperledger-fabric-linux-amd64-1.4.6.tar.gz
> 
> ===> Downloading version 1.4.6 platform specific fabric-ca-client binary
> ===> Downloading:  https://github.com/hyperledger/fabric-ca/releases/download/v1.4.6/hyperledger-fabric-ca-linux-amd64-1.4.6.tar.gz
> ```
> - 拉取Hyperledger Fabric Docker镜像：
>
> ```
> Pull Hyperledger Fabric docker images
> FABRIC_IMAGES: peer orderer ccenv tools javaenv
> ===> Pulling fabric Images
> 
> ====> hyperledger/fabric-peer:1.4.6
> 1.4.6: Pulling from hyperledger/fabric-peer
> 
> ====> hyperledger/fabric-orderer:1.4.6
> 1.4.6: Pulling from hyperledger/fabric-orderer
> 
> ====> hyperledger/fabric-ccenv:1.4.6
> 1.4.6: Pulling from hyperledger/fabric-ccenv
> 
> ====> hyperledger/fabric-tools:1.4.6
> 1.4.6: Pulling from hyperledger/fabric-tools
> 
> ====> hyperledger/fabric-javaenv:1.4.6
> 1.4.6: Pulling from hyperledger/fabric-javaenv
> 
> ====> hyperledger/fabric-ca:1.4.6
> 1.4.6: Pulling from hyperledger/fabric-ca
> 
> ===> Pulling thirdparty docker images
> ====> hyperledger/fabric-zookeeper:0.4.18
> 0.4.18: Pulling from hyperledger/fabric-zookeeper
> 
> ====> hyperledger/fabric-kafka:0.4.18
> 0.4.18: Pulling from hyperledger/fabric-kafka
> 
> ====> hyperledger/fabric-couchdb:0.4.18
> 0.4.18: Pulling from hyperledger/fabric-couchdb
> 
> ===> List out hyperledger docker images
> hyperledger/fabric-javaenv     1.4                 68914607b3a5        6 weeks ago         1.68GB
> hyperledger/fabric-javaenv     1.4.6               68914607b3a5        6 weeks ago         1.68GB
> hyperledger/fabric-javaenv     latest              68914607b3a5        6 weeks ago         1.68GB
> hyperledger/fabric-ca          1.4                 3b96a893c1e4        7 weeks ago         150MB
> hyperledger/fabric-ca          1.4.6               3b96a893c1e4        7 weeks ago         150MB
> hyperledger/fabric-ca          latest              3b96a893c1e4        7 weeks ago         150MB
> hyperledger/fabric-tools       1.4                 0f9743ac0662        7 weeks ago         1.49GB
> hyperledger/fabric-tools       1.4.6               0f9743ac0662        7 weeks ago         1.49GB
> hyperledger/fabric-tools       latest              0f9743ac0662        7 weeks ago         1.49GB
> hyperledger/fabric-ccenv       1.4                 191911f4454f        7 weeks ago         1.36GB
> hyperledger/fabric-ccenv       1.4.6               191911f4454f        7 weeks ago         1.36GB
> hyperledger/fabric-ccenv       latest              191911f4454f        7 weeks ago         1.36GB
> hyperledger/fabric-orderer     1.4                 84eaba5388e7        7 weeks ago         120MB
> hyperledger/fabric-orderer     1.4.6               84eaba5388e7        7 weeks ago         120MB
> hyperledger/fabric-orderer     latest              84eaba5388e7        7 weeks ago         120MB
> hyperledger/fabric-peer        1.4                 5a52faa5d8c2        7 weeks ago         128MB
> hyperledger/fabric-peer        1.4.6               5a52faa5d8c2        7 weeks ago         128MB
> hyperledger/fabric-peer        latest              5a52faa5d8c2        7 weeks ago         128MB
> hyperledger/fabric-zookeeper   0.4                 ede9389347db        5 months ago        276MB
> hyperledger/fabric-zookeeper   0.4.18              ede9389347db        5 months ago        276MB
> hyperledger/fabric-zookeeper   latest              ede9389347db        5 months ago        276MB
> hyperledger/fabric-kafka       0.4                 caaae0474ef2        5 months ago        270MB
> hyperledger/fabric-kafka       0.4.18              caaae0474ef2        5 months ago        270MB
> hyperledger/fabric-kafka       latest              caaae0474ef2        5 months ago        270MB
> hyperledger/fabric-couchdb     0.4                 d369d4eaa0fd        5 months ago        261MB
> hyperledger/fabric-couchdb     0.4.18              d369d4eaa0fd        5 months ago        261MB
> hyperledger/fabric-couchdb     latest              d369d4eaa0fd        5 months ago        261MB
> ```

### 2.3.2 官方first-network网络部署

- 进入对应目录

```bash
[vagrant@RUAN:~]$ cd /opt/gopath/src/github.com/hyperledger/fabric-samples/first-network
```

- 启动网络

```bash
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples/first-network] (v1.4.6)$ ./byfn.sh up -c jschannel
。。。。。。
========= All GOOD, BYFN execution completed =========== 
```

> 启动错误处理：
>
> - 如遇到错误：
>
> ```bash
> 2020-04-16 04:24:25.272 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 002 Using default vscc
> Error: could not assemble transaction, err proposal response was not successful, error code 500, msg error starting container: error starting container: Get https://registry-1.docker.io/v2/hyperledger/fabric-baseos/manifests/amd64-0.4.18: Get https://auth.docker.io/token?scope=repository%3Ahyperledger%2Ffabric-baseos%3Apull&service=registry.docker.io: net/http: TLS handshake timeout
> !!!!!!!!!!!!!!! Chaincode instantiation on peer0.org2 on channel 'jschannel' failed !!!!!!!!!!!!!!!!
> ========= ERROR !!! FAILED to execute End-2-End Scenario ===========
> ```
>
> - 添加docker国内镜像
>
> ```json
> $ cat /etc/docker/daemon.json 
> {
>   "registry-mirrors": ["https://registry.docker-cn.com"]
> }
> ```
>
> - 加载&重启
>
> ```bash
> $ sudo systemctl daemon-reload
> $ sudo systemctl restart docker
> ```

- 清理网络

```bash
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples/first-network] (v1.4.6)$ ./byfn.sh down
```

# 3 开发测试

> 以下将使用VSCode远程开发模式，连接我们前面启动的Fabric网络进行远程开发。
>
> 为了可以找到完整依赖，还需要下载`fabric`和`fabric-sdk-go`项目源码，并切换到恰当的分支：
>
> ```bash
> [vagrant@RUAN:/opt/gopath/src/github.com/hyperledger]$ git clone https://github.com/hyperledger/fabric.git
> [vagrant@RUAN:/opt/gopath/src/github.com/hyperledger]$ git checkout -b v1.4.6 v1.4.6
> 
> [vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric] (master)$ git clone https://github.com/hyperledger/fabric-sdk-go.git
> ```

## 3.1 链码开发

### 3.1.1 功能说明

本链码实现了一个购物积分平台，拥有如下功能：

- 初始化平台管理员拥有10000积分
- 用户注册，将会得到100积分奖励
- 用户之间可以互转积分

### 3.1.2 链码开发

#### 3.1.2.1 工程创建

```bash
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples/chaincode] (v1.4.6)$ cd ptcc/
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples/chaincode/ptcc] (v1.4.6)$ go mod init ptcc
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples/chaincode/ptcc] (v1.4.6)$ go get github.com/hyperledger/fabric@v1.4.6
```

#### 3.1.2.2 链码开发

```go
package main

import (
	"fmt"
	"strconv"

"github.com/hyperledger/fabric/core/chaincode/shim"
	pb "github.com/hyperledger/fabric/protos/peer"
)

// PointsTransferChaincode => 声明积分转移智能合约结构体
type PointsTransferChaincode struct {
}

// Init => 链码初始化接口
func (t *PointsTransferChaincode) Init(stub shim.ChaincodeStubInterface) pb.Response {
	args := stub.GetStringArgs()
	if len(args) != 2 {
		return shim.Error("初始化参数个数不匹配")
	}

err := stub.PutState(args[0], []byte(args[1]))
	if err != nil {
		return shim.Error("积分管理员初始化失败")
	}

return shim.Success(nil)
}

// Invoke => 链码调用接口
func (t *PointsTransferChaincode) Invoke(stub shim.ChaincodeStubInterface) pb.Response {
	function, args := stub.GetFunctionAndParameters()
	if function == "transfer" {
		return t.transfer(stub, args)
	} else if function == "query" {
		return t.query(stub, args)
	}

return shim.Error("无效交易方法，仅支持：transfer|query")
}

func (t *PointsTransferChaincode) transfer(stub shim.ChaincodeStubInterface, args []string) pb.Response {
	outUser := args[0]
	inUser := args[1]
	offsetVal, _ := strconv.Atoi(args[2])

outUserPointBalanceByte, _ := stub.GetState(outUser)
	outUserPointBalance, _ := strconv.Atoi(string(outUserPointBalanceByte))

inUserPointBalanceByte, _ := stub.GetState(inUser)
	inUserPointBalance, _ := strconv.Atoi(string(inUserPointBalanceByte))

outUserPointBalance = outUserPointBalance - offsetVal
	inUserPointBalance = inUserPointBalance + offsetVal

err := stub.PutState(outUser, []byte(strconv.Itoa(outUserPointBalance)))
	if err != nil {
		return shim.Error(err.Error())
	}

err = stub.PutState(inUser, []byte(strconv.Itoa(inUserPointBalance)))
	if err != nil {
		return shim.Error(err.Error())
	}

return shim.Success(nil)
}

func (t *PointsTransferChaincode) query(stub shim.ChaincodeStubInterface, args []string) pb.Response {
	userPointsBalance, _ := stub.GetState(args[0])
	if userPointsBalance == nil {
		return shim.Error("查询账户余额失败")
	}

return shim.Success(userPointsBalance)
}

func main() {
	err := shim.Start(new(PointsTransferChaincode))
	if err != nil {
		fmt.Printf("积分转移链码启动失败: %s\n", err)
	}
}
```

#### 3.1.2.3 编写测试用例

```go
package main

import (
	"fmt"
	"testing"

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

func checkInit(t *testing.T, stub *shim.MockStub) {
	args := [][]byte{[]byte("Jason"), []byte("10000")}
	res := stub.MockInit("初始化交易", args)
	if res.Status == shim.OK {
		fmt.Println("Init success :)")
	} else {
		fmt.Println("Init failed :(")
		t.FailNow()
	}
}

func checkPointsTransfer(t *testing.T, stub *shim.MockStub, arg1, arg2, arg3 string) {
	args := [][]byte{[]byte("transfer"), []byte(arg1), []byte(arg2), []byte(arg3)}
	res := stub.MockInvoke("积分转移交易", args)
	if res.Status == shim.OK {
		fmt.Printf("%s转给%s %s积分交易成功:)\n", arg1, arg2, arg3)
	} else {
		fmt.Printf("%s转给%s %s积分交易失败:(\n", arg1, arg2, arg3)
		t.FailNow()
	}
}

func checkQueryBalance(t *testing.T, stub *shim.MockStub, username string) {
	args := [][]byte{[]byte("query"), []byte(username)}
	res := stub.MockInvoke("用户积分查询", args)
	if res.Status == shim.OK {
		fmt.Printf("%s查询积分交易成功，积分为：%s\n", username, res.GetPayload())
	} else {
		fmt.Printf("%s查询积分交易失败\n", username)
		t.FailNow()
	}
}

func Test_PTCC(t *testing.T) {
	stub := shim.NewMockStub("ptcc", new(PointsTransferChaincode))
	checkInit(t, stub)
	checkPointsTransfer(t, stub, "Jason", "XX", "100")
	checkPointsTransfer(t, stub, "Jason", "YY", "100")
	checkPointsTransfer(t, stub, "XX", "YY", "10")
	checkQueryBalance(t, stub, "Jason")
	checkQueryBalance(t, stub, "XX")
	checkQueryBalance(t, stub, "YY")

// === RUN   Test_PTCC
	// Init success :)
	// Jason转给XX 100积分交易成功:)
	// Jason转给YY 100积分交易成功:)
	// XX转给YY 10积分交易成功:)
	// Jason查询积分交易成功，积分为：9800
	// XX查询积分交易成功，积分为：90
	// YY查询积分交易成功，积分为：110
	// --- PASS: Test_PTCC (0.00s)
	// PASS
	// ok  	ptcc	0.029s
	// Success: Tests passed.
}
```

> TIPS：开启VSCode保存即测试是个不错的选择：
>
> ![image.png](https://img.learnblockchain.cn/attachments/2020/05/nRklFS745ebe383660501.png)

### 3.1.3 链码部署

> 我们直接将其部署到前面启动的官方`first-network`网络。

#### 3.1.3.1 安装链码

```bash
# 进入工具容器
$ docker exec -it cli bash

# 进入链码所在路径
root@ce34ec1e55ae:/opt/gopath/src/github.com/hyperledger/fabric/peer# cd /opt/gopath/src/github.com/chaincode/ptcc

# 执行安装链码命令
## 组织1的peer节点安装
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode install -n ptcc -v 2.0 -l golang -p github.com/chaincode/ptcc 
2020-04-17 04:29:09.820 UTC [chaincodeCmd] install -> INFO 003 Installed remotely response:<status:200 payload:"OK" >

## 组织2的peer节点安装
export CORE_PEER_LOCALMSPID=Org2MSP
export CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt
export CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp
export CORE_PEER_ADDRESS=peer0.org2.example.com:9051
export CORE_PEER_TLS_KEY_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/server.key
export CORE_PEER_TLS_CERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/server.crt
export CORE_PEER_TLS_ENABLED=true
export CORE_PEER_ID=cli
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode install -n ptcc -v 2.0 -l golang -p github.com/chaincode/ptcc 
2020-04-17 06:46:16.719 UTC [chaincodeCmd] install -> INFO 003 Installed remotely response:<status:200 payload:"OK" > 
```

#### 3.1.3.2 实例化链码

```bash
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode instantiate -o orderer.example.com:7050 --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C jschannel -n ptcc -l golang -v 2.0 -c '{"Args":["Jason","10000"]}' -P 'AND ('\''Org1MSP.peer'\'','\''Org2MSP.peer'\'')'
2020-04-17 04:53:04.776 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 001 Using default escc
2020-04-17 04:53:04.777 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 002 Using default vscc
```

#### 3.1.3.3 链码容器

> 链码实例化后，将会启动一个链码容器：

```bash
IMAGE：dev-peer0.org1.example.com-ptcc-2.0-e3487c2ca0e68959525d94a4bd69896f99c169db1e3d031d4650a9e74d568d4d

NAMES：dev-peer0.org1.example.com-ptcc-2.0
```

### 3.1.4 链码调用

- 管理员余额查看

```bash
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode query -C jschannel -n ptcc -c '{"Args":["query","Jason"]}'
10000
```

- 管理员给XX用户发放100积分

```bash
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode invoke -o orderer.example.com:7050 --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C jschannel -n ptcc --peerAddresses peer0.org1.example.com:7051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --peerAddresses peer0.org2.example.com:9051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt -c '{"Args":["transfer","Jason","XX","100"]}'

2020-04-17 06:47:25.599 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 001 Chaincode invoke successful. result: status:200 
```

- 管理员给YY用户发放100积分

2020-04-17 06:48:18.142 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 001 Chaincode invoke successful. result: status:200
```

- 用户XX给用户YY转账10积分

- 分别查看用户当前积分情况

```bash
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode query -C jschannel -n ptcc -c '{"Args":["query","Jason"]}'
9800
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode query -C jschannel -n ptcc -c '{"Args":["query","XX"]}'
90
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode query -C jschannel -n ptcc -c '{"Args":["query","YY"]}'
110
```

## 3.2 客户端SDK开发

### 3.2.1 功能说明

fabric提供Go、Java、Node的SDK，本节使用Go的SDK开发客户端程序调用前面部署好的链码。

### 3.2.2 模块开发

#### 3.2.2.1 工程创建

```bash
[vagrant@RUAN:/opt/gopath/src/client]$ go mod init client
go: creating new go.mod: module client

# 注：这里需要使用master，默认使用v1.0.0-beta1版本，没有所需的这个库：fabric-sdk-go/pkg/gateway
[vagrant@RUAN:/opt/gopath/src/client]$ go get github.com/hyperledger/fabric-sdk-go@master
go: github.com/hyperledger/fabric-sdk-go master => v1.0.0-beta1.0.20200416003947-f7729f181cbf
go: downloading github.com/hyperledger/fabric-sdk-go v1.0.0-beta1.0.20200416003947-f7729f181cbf
```

#### 3.2.2.2 模块开发

```go
package client

import (
	"log"

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

// NewContract => 创建Fabric网络交互对象
func NewContract() *gateway.Contract {
	// 需要修改该配置的channelName为jschannel
	configPath := "/opt/gopath/src/github.com/hyperledger/fabric-sdk-go/pkg/gateway/testdata/connection-tls.json"
	channelName := "jschannel"
	chaincodeName := "ptcc"

// 创建SDK操作对象
	sdk, err := fabsdk.New(config.FromFile(configPath))
	if err != nil {
		log.Fatalf("fabsdk new failed, %s", err.Error())
	}
	gw, err := gateway.Connect(gateway.WithSDK(sdk), gateway.WithUser("Admin"))
	if err != nil {
		log.Fatalf("gateway connect failed, %s", err.Error())
	}
	defer gw.Close()

network, err := gw.GetNetwork(channelName)
	if err != nil {
		log.Fatalf("gw get network failed, %s", err.Error())
	}

return network.GetContract(chaincodeName)
}

func transfer(contract *gateway.Contract) error {
	_, err := contract.SubmitTransaction("transfer", "XX", "YY", "10")
	if err != nil {
		return err
	}

return nil
}

func query(contract *gateway.Contract, key string) string {
	resp, err := contract.EvaluateTransaction("query", key)
	if err != nil {
		log.Fatalf("query failed, %s", err.Error())
	}

return string(resp)
}
```

#### 3.2.2.3 测试用例编写

```go
package client

import (
	"fmt"
	"testing"
	"time"
)

func Test_TransferAndQuery(t *testing.T) {
	contract := NewContract()
	valueA := query(contract, "XX")
	valueB := query(contract, "YY")
	fmt.Printf("转账前 XX=%s YY=%s\n", valueA, valueB)

err := transfer(contract)
	if err != nil {
		fmt.Printf("转出接口测试失败, %s\n", err.Error())
		t.FailNow()
	}

fmt.Println("a给b转账10元执行成功！")
	time.Sleep(2 * time.Second)

valueA = query(contract, "XX")
	valueB = query(contract, "YY")
	fmt.Printf("转账前 XX=%s YY=%s\n", valueA, valueB)
}
```

### 3.2.3 链码调用

- 导入客户端连接fabric所需证书

```bash
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-sdk-go/test/fixtures/fabric/v1] (master)$ ln -s /opt/gopath/src/github.com/hyperledger/fabric-samples/first-network/crypto-config .
```

- 配置hosts

```bash
127.0.0.1       peer0.org1.example.com 
127.0.0.1       peer1.org1.example.com 
127.0.0.1       peer0.org2.example.com 
127.0.0.1       peer1.org2.example.com 
127.0.0.1       orderer.example.com
```

- 执行测试命令

```bash
[vagrant@RUAN:/opt/gopath/src/client]$ go test
转账前 XX=90 YY=110
a给b转账10元执行成功！
转账前 XX=80 YY=120
PASS
ok  	client	4.858s
```

快速带你上手Hyperledger Fabric环境搭建＋开发测试

jasonruan 2020.04.20

1 前言

本文采用virtualbox+vagrant方式搭建Hyperledger Fabric环境，采用VSCode远程开发模式开发调试链码和客户端程序。

2 环境搭建

2.1 搭建虚拟机环境

2.1.1 生成配置文件

使用版本：Ubuntu 18.04 LTS

执行以下命令后，将生成Vagrantfile配置文件

$ vagrant init ubuntu/bionic64

2.1.2 指定虚拟机名称

修改Vagrantfile配置文件，增加如下内容：

  config.vm.provider "virtualbox" do |v|
      v.name = "js-fabric"
  end

2.1.3 拉取镜像并启动

根据配置文件拉取镜像并创建Ubuntu18.04虚拟机

$ vagrant up

在Virtualbox看到虚拟机已启动

2.1.4 登录虚拟机

(2020-04-14 12:44:40) [jason@RUAN:~/Vagrant/js-fabric]$ vagrant ssh
Welcome to Ubuntu 18.04.4 LTS (GNU/Linux 4.15.0-96-generic x86_64)

vagrant@ubuntu-bionic:~$

2.2 安装依赖工具

2.2.1 go

vagrant@ubuntu-bionic:~/Soft$ wget https://dl.google.com/go/go1.14.2.linux-amd64.tar.gz

vagrant@ubuntu-bionic:~/Soft$ sudo tar -zxvf go1.14.2.linux-amd64.tar.gz -C /opt

vagrant@ubuntu-bionic:~/Soft$ echo "export GOROOT=/opt/go" >> ~/.bashrc
vagrant@ubuntu-bionic:~/Soft$ echo "export GOPATH=/opt/gopath" >> ~/.bashrc
vagrant@ubuntu-bionic:~/Soft$ echo "export PATH=\$GOROOT/bin:\$GOPATH/bin:\$PATH" >>  ~/.bashrc

vagrant@ubuntu-bionic:~/Soft$ . ~/.bashrc 

vagrant@ubuntu-bionic:~/Soft$ go version
go version go1.14.2 linux/amd64

2.2.2 docker

vagrant@ubuntu-bionic:~/Soft$ curl -fsSL https://get.docker.com -o get-docker.sh
vagrant@ubuntu-bionic:~/Soft$ sudo sh get-docker.sh 
vagrant@ubuntu-bionic:~/Soft$ sudo usermod -aG docker $USER
vagrant@ubuntu-bionic:~/Soft$ sudo systemctl restart docker
vagrant@ubuntu-bionic:~$ docker version
Client: Docker Engine - Community
 Version:           19.03.8
 API version:       1.40
 Go version:        go1.12.17
 Git commit:        afacb8b7f0
 Built:             Wed Mar 11 01:25:46 2020
 OS/Arch:           linux/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.8
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.12.17
  Git commit:       afacb8b7f0
  Built:            Wed Mar 11 01:24:19 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.2.13
  GitCommit:        7ad184331fa3e55e52b890ea95e65ba581ae3429
 runc:
  Version:          1.0.0-rc10
  GitCommit:        dc9208a3303feef5b3839f4323d9beb36df0a9dd
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683

2.2.3 docker-compose

vagrant@ubuntu-bionic:~$ sudo curl -L "https://github.com/docker/compose/releases/download/1.25.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

vagrant@ubuntu-bionic:~$ sudo chmod 755 /usr/local/bin/docker-compose

vagrant@ubuntu-bionic:~$ docker-compose --version
docker-compose version 1.25.4, build 8d51620a

2.3 官方样例部署

官方样例：https://github.com/hyperledger/fabric-samples

2.3.1 源码及镜像下载

下载源码

vagrant@ubuntu-bionic:~$ mkdir -p $GOPATH/src/github.com/hyperledger
vagrant@ubuntu-bionic:~$ cd $GOPATH/src/github.com/hyperledger
vagrant@ubuntu-bionic:/opt/gopath/src/github.com/hyperledger$ git clone https://github.com/hyperledger/fabric-samples.git

切换分支

[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples] (master)$ git checkout -b v1.4.6 v1.4.6
Switched to a new branch 'v1.4.6'

下载引导脚本

[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples] (v1.4.6)$ curl -sS https://raw.githubusercontent.com/hyperledger/fabric/master/scripts/bootstrap.sh -o ./scripts/bootstrap.sh

[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples] (v1.4.6)$ chmod +x scripts/bootstrap.sh

下载必备二进制文件和docker镜像

# ./scripts/bootstrap.sh [version] [ca version] [thirdparty_version]
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples] (v1.4.6)$ ./scripts/bootstrap.sh 1.4.6 1.4.6 0.4.18 -s

具体流程：

下载Hyperledger Fabric二进制包：

===> Downloading version 1.4.6 platform specific fabric binaries
===> Downloading:  https://github.com/hyperledger/fabric/releases/download/v1.4.6/hyperledger-fabric-linux-amd64-1.4.6.tar.gz

===> Downloading version 1.4.6 platform specific fabric-ca-client binary
===> Downloading:  https://github.com/hyperledger/fabric-ca/releases/download/v1.4.6/hyperledger-fabric-ca-linux-amd64-1.4.6.tar.gz

拉取Hyperledger Fabric Docker镜像：

Pull Hyperledger Fabric docker images
FABRIC_IMAGES: peer orderer ccenv tools javaenv
===> Pulling fabric Images

====> hyperledger/fabric-peer:1.4.6
1.4.6: Pulling from hyperledger/fabric-peer

====> hyperledger/fabric-orderer:1.4.6
1.4.6: Pulling from hyperledger/fabric-orderer

====> hyperledger/fabric-ccenv:1.4.6
1.4.6: Pulling from hyperledger/fabric-ccenv

====> hyperledger/fabric-tools:1.4.6
1.4.6: Pulling from hyperledger/fabric-tools

====> hyperledger/fabric-javaenv:1.4.6
1.4.6: Pulling from hyperledger/fabric-javaenv

====> hyperledger/fabric-ca:1.4.6
1.4.6: Pulling from hyperledger/fabric-ca

===> Pulling thirdparty docker images
====> hyperledger/fabric-zookeeper:0.4.18
0.4.18: Pulling from hyperledger/fabric-zookeeper

====> hyperledger/fabric-kafka:0.4.18
0.4.18: Pulling from hyperledger/fabric-kafka

====> hyperledger/fabric-couchdb:0.4.18
0.4.18: Pulling from hyperledger/fabric-couchdb

===> List out hyperledger docker images
hyperledger/fabric-javaenv     1.4                 68914607b3a5        6 weeks ago         1.68GB
hyperledger/fabric-javaenv     1.4.6               68914607b3a5        6 weeks ago         1.68GB
hyperledger/fabric-javaenv     latest              68914607b3a5        6 weeks ago         1.68GB
hyperledger/fabric-ca          1.4                 3b96a893c1e4        7 weeks ago         150MB
hyperledger/fabric-ca          1.4.6               3b96a893c1e4        7 weeks ago         150MB
hyperledger/fabric-ca          latest              3b96a893c1e4        7 weeks ago         150MB
hyperledger/fabric-tools       1.4                 0f9743ac0662        7 weeks ago         1.49GB
hyperledger/fabric-tools       1.4.6               0f9743ac0662        7 weeks ago         1.49GB
hyperledger/fabric-tools       latest              0f9743ac0662        7 weeks ago         1.49GB
hyperledger/fabric-ccenv       1.4                 191911f4454f        7 weeks ago         1.36GB
hyperledger/fabric-ccenv       1.4.6               191911f4454f        7 weeks ago         1.36GB
hyperledger/fabric-ccenv       latest              191911f4454f        7 weeks ago         1.36GB
hyperledger/fabric-orderer     1.4                 84eaba5388e7        7 weeks ago         120MB
hyperledger/fabric-orderer     1.4.6               84eaba5388e7        7 weeks ago         120MB
hyperledger/fabric-orderer     latest              84eaba5388e7        7 weeks ago         120MB
hyperledger/fabric-peer        1.4                 5a52faa5d8c2        7 weeks ago         128MB
hyperledger/fabric-peer        1.4.6               5a52faa5d8c2        7 weeks ago         128MB
hyperledger/fabric-peer        latest              5a52faa5d8c2        7 weeks ago         128MB
hyperledger/fabric-zookeeper   0.4                 ede9389347db        5 months ago        276MB
hyperledger/fabric-zookeeper   0.4.18              ede9389347db        5 months ago        276MB
hyperledger/fabric-zookeeper   latest              ede9389347db        5 months ago        276MB
hyperledger/fabric-kafka       0.4                 caaae0474ef2        5 months ago        270MB
hyperledger/fabric-kafka       0.4.18              caaae0474ef2        5 months ago        270MB
hyperledger/fabric-kafka       latest              caaae0474ef2        5 months ago        270MB
hyperledger/fabric-couchdb     0.4                 d369d4eaa0fd        5 months ago        261MB
hyperledger/fabric-couchdb     0.4.18              d369d4eaa0fd        5 months ago        261MB
hyperledger/fabric-couchdb     latest              d369d4eaa0fd        5 months ago        261MB

2.3.2 官方first-network网络部署

[vagrant@RUAN:~]$ cd /opt/gopath/src/github.com/hyperledger/fabric-samples/first-network

启动网络

[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples/first-network] (v1.4.6)$ ./byfn.sh up -c jschannel
。。。。。。
========= All GOOD, BYFN execution completed ===========

启动错误处理：

如遇到错误：

2020-04-16 04:24:25.272 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 002 Using default vscc
Error: could not assemble transaction, err proposal response was not successful, error code 500, msg error starting container: error starting container: Get https://registry-1.docker.io/v2/hyperledger/fabric-baseos/manifests/amd64-0.4.18: Get https://auth.docker.io/token?scope=repository%3Ahyperledger%2Ffabric-baseos%3Apull&service=registry.docker.io: net/http: TLS handshake timeout
!!!!!!!!!!!!!!! Chaincode instantiation on peer0.org2 on channel 'jschannel' failed !!!!!!!!!!!!!!!!
========= ERROR !!! FAILED to execute End-2-End Scenario ===========

添加docker国内镜像

$ cat /etc/docker/daemon.json 
{
  "registry-mirrors": ["https://registry.docker-cn.com"]
}

加载&重启

$ sudo systemctl daemon-reload
$ sudo systemctl restart docker

清理网络

[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples/first-network] (v1.4.6)$ ./byfn.sh down

3 开发测试

以下将使用VSCode远程开发模式，连接我们前面启动的Fabric网络进行远程开发。

为了可以找到完整依赖，还需要下载fabric和fabric-sdk-go项目源码，并切换到恰当的分支：
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger]$ git clone https://github.com/hyperledger/fabric.git
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger]$ git checkout -b v1.4.6 v1.4.6

[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric] (master)$ git clone https://github.com/hyperledger/fabric-sdk-go.git

3.1 链码开发

3.1.1 功能说明

本链码实现了一个购物积分平台，拥有如下功能：

初始化平台管理员拥有10000积分
用户注册，将会得到100积分奖励
用户之间可以互转积分

3.1.2 链码开发

3.1.2.1 工程创建

[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples/chaincode] (v1.4.6)$ cd ptcc/
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples/chaincode/ptcc] (v1.4.6)$ go mod init ptcc
[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-samples/chaincode/ptcc] (v1.4.6)$ go get github.com/hyperledger/fabric@v1.4.6

3.1.2.2 链码开发

package main

import (
    "fmt"
    "strconv"

    "github.com/hyperledger/fabric/core/chaincode/shim"
    pb "github.com/hyperledger/fabric/protos/peer"
)

// PointsTransferChaincode => 声明积分转移智能合约结构体
type PointsTransferChaincode struct {
}

// Init => 链码初始化接口
func (t *PointsTransferChaincode) Init(stub shim.ChaincodeStubInterface) pb.Response {
    args := stub.GetStringArgs()
    if len(args) != 2 {
        return shim.Error("初始化参数个数不匹配")
    }

    err := stub.PutState(args[0], []byte(args[1]))
    if err != nil {
        return shim.Error("积分管理员初始化失败")
    }

    return shim.Success(nil)
}

// Invoke => 链码调用接口
func (t *PointsTransferChaincode) Invoke(stub shim.ChaincodeStubInterface) pb.Response {
    function, args := stub.GetFunctionAndParameters()
    if function == "transfer" {
        return t.transfer(stub, args)
    } else if function == "query" {
        return t.query(stub, args)
    }

    return shim.Error("无效交易方法，仅支持：transfer|query")
}

func (t *PointsTransferChaincode) transfer(stub shim.ChaincodeStubInterface, args []string) pb.Response {
    outUser := args[0]
    inUser := args[1]
    offsetVal, _ := strconv.Atoi(args[2])

    outUserPointBalanceByte, _ := stub.GetState(outUser)
    outUserPointBalance, _ := strconv.Atoi(string(outUserPointBalanceByte))

    inUserPointBalanceByte, _ := stub.GetState(inUser)
    inUserPointBalance, _ := strconv.Atoi(string(inUserPointBalanceByte))

    outUserPointBalance = outUserPointBalance - offsetVal
    inUserPointBalance = inUserPointBalance + offsetVal

    err := stub.PutState(outUser, []byte(strconv.Itoa(outUserPointBalance)))
    if err != nil {
        return shim.Error(err.Error())
    }

    err = stub.PutState(inUser, []byte(strconv.Itoa(inUserPointBalance)))
    if err != nil {
        return shim.Error(err.Error())
    }

    return shim.Success(nil)
}

func (t *PointsTransferChaincode) query(stub shim.ChaincodeStubInterface, args []string) pb.Response {
    userPointsBalance, _ := stub.GetState(args[0])
    if userPointsBalance == nil {
        return shim.Error("查询账户余额失败")
    }

    return shim.Success(userPointsBalance)
}

func main() {
    err := shim.Start(new(PointsTransferChaincode))
    if err != nil {
        fmt.Printf("积分转移链码启动失败: %s\n", err)
    }
}

3.1.2.3 编写测试用例

package main

import (
    "fmt"
    "testing"

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

func checkInit(t *testing.T, stub *shim.MockStub) {
    args := [][]byte{[]byte("Jason"), []byte("10000")}
    res := stub.MockInit("初始化交易", args)
    if res.Status == shim.OK {
        fmt.Println("Init success :)")
    } else {
        fmt.Println("Init failed :(")
        t.FailNow()
    }
}

func checkPointsTransfer(t *testing.T, stub *shim.MockStub, arg1, arg2, arg3 string) {
    args := [][]byte{[]byte("transfer"), []byte(arg1), []byte(arg2), []byte(arg3)}
    res := stub.MockInvoke("积分转移交易", args)
    if res.Status == shim.OK {
        fmt.Printf("%s转给%s %s积分交易成功:)\n", arg1, arg2, arg3)
    } else {
        fmt.Printf("%s转给%s %s积分交易失败:(\n", arg1, arg2, arg3)
        t.FailNow()
    }
}

func checkQueryBalance(t *testing.T, stub *shim.MockStub, username string) {
    args := [][]byte{[]byte("query"), []byte(username)}
    res := stub.MockInvoke("用户积分查询", args)
    if res.Status == shim.OK {
        fmt.Printf("%s查询积分交易成功，积分为：%s\n", username, res.GetPayload())
    } else {
        fmt.Printf("%s查询积分交易失败\n", username)
        t.FailNow()
    }
}

func Test_PTCC(t *testing.T) {
    stub := shim.NewMockStub("ptcc", new(PointsTransferChaincode))
    checkInit(t, stub)
    checkPointsTransfer(t, stub, "Jason", "XX", "100")
    checkPointsTransfer(t, stub, "Jason", "YY", "100")
    checkPointsTransfer(t, stub, "XX", "YY", "10")
    checkQueryBalance(t, stub, "Jason")
    checkQueryBalance(t, stub, "XX")
    checkQueryBalance(t, stub, "YY")

    // === RUN   Test_PTCC
    // Init success :)
    // Jason转给XX 100积分交易成功:)
    // Jason转给YY 100积分交易成功:)
    // XX转给YY 10积分交易成功:)
    // Jason查询积分交易成功，积分为：9800
    // XX查询积分交易成功，积分为：90
    // YY查询积分交易成功，积分为：110
    // --- PASS: Test_PTCC (0.00s)
    // PASS
    // ok   ptcc    0.029s
    // Success: Tests passed.
}

TIPS：开启VSCode保存即测试是个不错的选择：

3.1.3 链码部署

我们直接将其部署到前面启动的官方first-network网络。

3.1.3.1 安装链码

# 进入工具容器
$ docker exec -it cli bash

# 进入链码所在路径
root@ce34ec1e55ae:/opt/gopath/src/github.com/hyperledger/fabric/peer# cd /opt/gopath/src/github.com/chaincode/ptcc

# 执行安装链码命令
## 组织1的peer节点安装
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode install -n ptcc -v 2.0 -l golang -p github.com/chaincode/ptcc 
2020-04-17 04:29:09.820 UTC [chaincodeCmd] install -> INFO 003 Installed remotely response:&lt;status:200 payload:"OK" > 

## 组织2的peer节点安装
export CORE_PEER_LOCALMSPID=Org2MSP
export CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt
export CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp
export CORE_PEER_ADDRESS=peer0.org2.example.com:9051
export CORE_PEER_TLS_KEY_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/server.key
export CORE_PEER_TLS_CERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/server.crt
export CORE_PEER_TLS_ENABLED=true
export CORE_PEER_ID=cli
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode install -n ptcc -v 2.0 -l golang -p github.com/chaincode/ptcc 
2020-04-17 06:46:16.719 UTC [chaincodeCmd] install -> INFO 003 Installed remotely response:&lt;status:200 payload:"OK" >

3.1.3.2 实例化链码

root@ce34ec1e55ae:/opt/gopath/src# peer chaincode instantiate -o orderer.example.com:7050 --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C jschannel -n ptcc -l golang -v 2.0 -c '{"Args":["Jason","10000"]}' -P 'AND ('\''Org1MSP.peer'\'','\''Org2MSP.peer'\'')'
2020-04-17 04:53:04.776 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 001 Using default escc
2020-04-17 04:53:04.777 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 002 Using default vscc

3.1.3.3 链码容器

链码实例化后，将会启动一个链码容器：

IMAGE：dev-peer0.org1.example.com-ptcc-2.0-e3487c2ca0e68959525d94a4bd69896f99c169db1e3d031d4650a9e74d568d4d

NAMES：dev-peer0.org1.example.com-ptcc-2.0

3.1.4 链码调用

管理员余额查看

root@ce34ec1e55ae:/opt/gopath/src# peer chaincode query -C jschannel -n ptcc -c '{"Args":["query","Jason"]}'
10000

管理员给XX用户发放100积分

root@ce34ec1e55ae:/opt/gopath/src# peer chaincode invoke -o orderer.example.com:7050 --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C jschannel -n ptcc --peerAddresses peer0.org1.example.com:7051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --peerAddresses peer0.org2.example.com:9051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt -c '{"Args":["transfer","Jason","XX","100"]}'

2020-04-17 06:47:25.599 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 001 Chaincode invoke successful. result: status:200

管理员给YY用户发放100积分

root@ce34ec1e55ae:/opt/gopath/src# peer chaincode invoke -o orderer.example.com:7050 --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C jschannel -n ptcc --peerAddresses peer0.org1.example.com:7051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --peerAddresses peer0.org2.example.com:9051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt -c '{"Args":["transfer","Jason","YY","100"]}'

2020-04-17 06:48:18.142 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 001 Chaincode invoke successful. result: status:200

用户XX给用户YY转账10积分

root@ce34ec1e55ae:/opt/gopath/src# peer chaincode invoke -o orderer.example.com:7050 --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C jschannel -n ptcc --peerAddresses peer0.org1.example.com:7051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --peerAddresses peer0.org2.example.com:9051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt -c '{"Args":["transfer","XX","YY","10"]}'
2020-04-17 06:49:15.393 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 001 Chaincode invoke successful. result: status:200

分别查看用户当前积分情况

root@ce34ec1e55ae:/opt/gopath/src# peer chaincode query -C jschannel -n ptcc -c '{"Args":["query","Jason"]}'
9800
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode query -C jschannel -n ptcc -c '{"Args":["query","XX"]}'
90
root@ce34ec1e55ae:/opt/gopath/src# peer chaincode query -C jschannel -n ptcc -c '{"Args":["query","YY"]}'
110

3.2 客户端SDK开发

3.2.1 功能说明

fabric提供Go、Java、Node的SDK，本节使用Go的SDK开发客户端程序调用前面部署好的链码。

3.2.2 模块开发

3.2.2.1 工程创建

[vagrant@RUAN:/opt/gopath/src/client]$ go mod init client
go: creating new go.mod: module client

# 注：这里需要使用master，默认使用v1.0.0-beta1版本，没有所需的这个库：fabric-sdk-go/pkg/gateway
[vagrant@RUAN:/opt/gopath/src/client]$ go get github.com/hyperledger/fabric-sdk-go@master
go: github.com/hyperledger/fabric-sdk-go master => v1.0.0-beta1.0.20200416003947-f7729f181cbf
go: downloading github.com/hyperledger/fabric-sdk-go v1.0.0-beta1.0.20200416003947-f7729f181cbf

3.2.2.2 模块开发

package client

import (
    "log"

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

// NewContract => 创建Fabric网络交互对象
func NewContract() *gateway.Contract {
    // 需要修改该配置的channelName为jschannel
    configPath := "/opt/gopath/src/github.com/hyperledger/fabric-sdk-go/pkg/gateway/testdata/connection-tls.json"
    channelName := "jschannel"
    chaincodeName := "ptcc"

    // 创建SDK操作对象
    sdk, err := fabsdk.New(config.FromFile(configPath))
    if err != nil {
        log.Fatalf("fabsdk new failed, %s", err.Error())
    }
    gw, err := gateway.Connect(gateway.WithSDK(sdk), gateway.WithUser("Admin"))
    if err != nil {
        log.Fatalf("gateway connect failed, %s", err.Error())
    }
    defer gw.Close()

    network, err := gw.GetNetwork(channelName)
    if err != nil {
        log.Fatalf("gw get network failed, %s", err.Error())
    }

    return network.GetContract(chaincodeName)
}

func transfer(contract *gateway.Contract) error {
    _, err := contract.SubmitTransaction("transfer", "XX", "YY", "10")
    if err != nil {
        return err
    }

    return nil
}

func query(contract *gateway.Contract, key string) string {
    resp, err := contract.EvaluateTransaction("query", key)
    if err != nil {
        log.Fatalf("query failed, %s", err.Error())
    }

    return string(resp)
}

3.2.2.3 测试用例编写

package client

import (
    "fmt"
    "testing"
    "time"
)

func Test_TransferAndQuery(t *testing.T) {
    contract := NewContract()
    valueA := query(contract, "XX")
    valueB := query(contract, "YY")
    fmt.Printf("转账前 XX=%s YY=%s\n", valueA, valueB)

    err := transfer(contract)
    if err != nil {
        fmt.Printf("转出接口测试失败, %s\n", err.Error())
        t.FailNow()
    }

    fmt.Println("a给b转账10元执行成功！")
    time.Sleep(2 * time.Second)

    valueA = query(contract, "XX")
    valueB = query(contract, "YY")
    fmt.Printf("转账前 XX=%s YY=%s\n", valueA, valueB)
}

3.2.3 链码调用

导入客户端连接fabric所需证书

[vagrant@RUAN:/opt/gopath/src/github.com/hyperledger/fabric-sdk-go/test/fixtures/fabric/v1] (master)$ ln -s /opt/gopath/src/github.com/hyperledger/fabric-samples/first-network/crypto-config .

配置hosts

127.0.0.1       peer0.org1.example.com 
127.0.0.1       peer1.org1.example.com 
127.0.0.1       peer0.org2.example.com 
127.0.0.1       peer1.org2.example.com 
127.0.0.1       orderer.example.com

执行测试命令

[vagrant@RUAN:/opt/gopath/src/client]$ go test
转账前 XX=90 YY=110
a给b转账10元执行成功！
转账前 XX=80 YY=120
PASS
ok      client  4.858s

学分: 245
分类: Fabric
标签: Fabric 环境搭建

本文参与登链社区写作激励计划，好文好收益，欢迎正在阅读的你也加入。

快速带你上手Hyperledger Fabric环境搭建＋开发测试

快速带你上手Hyperledger Fabric环境搭建＋开发测试

1 前言

2 环境搭建

2.1 搭建虚拟机环境

2.1.1 生成配置文件

2.1.2 指定虚拟机名称

2.1.3 拉取镜像并启动

2.1.4 登录虚拟机

2.2 安装依赖工具

2.2.1 go

2.2.2 docker

2.2.3 docker-compose

2.3 官方样例部署

2.3.1 源码及镜像下载

2.3.2 官方first-network网络部署

3 开发测试

3.1 链码开发

3.1.1 功能说明

3.1.2 链码开发

3.1.2.1 工程创建

3.1.2.2 链码开发

3.1.2.3 编写测试用例

3.1.3 链码部署

3.1.3.1 安装链码

3.1.3.2 实例化链码

3.1.3.3 链码容器

3.1.4 链码调用

3.2 客户端SDK开发

3.2.1 功能说明

3.2.2 模块开发

3.2.2.1 工程创建

3.2.2.2 模块开发

3.2.2.3 测试用例编写

3.2.3 链码调用

2 条评论

文章目录