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使用go语言编写的智能合约进行实战（fabcar.go）

本文指令适合于Ubuntu和Centos系统

启动网络（前提是已经搭建Fabric2.0网络）

首先切换到fabric目录下

cd ~/go/src/github.com/hyperledger/fabric

把fabric-samples克隆下来

git clone https://github.com/hyperledger/fabric-samples.git

随后到first-network中使用指令启动网络

cd ~/go/src/github.com/hyperledger/fabric/fabric-samples/first-network ./byfn.sh up

出现下图则搭建完成

下载智能合约依赖

到fabcar的智能合约文件中并下载依赖

cd  ~/go/src/github.com/hyperledger/fabric/fabric-samples/chaincode/fabcar/gogo env -w GOPROXY=https://goproxy.io,directgo env -w GO111MODULE=ongo mod initgo mod vendor

执行完毕后fabcar/go文件夹下多出vendor，这个就是放智能合约依赖包的文件夹

进入cli容器中

docker exec -it cli bash

组织1（Org1）部署智能合约

打包智能合约

peer lifecycle chaincode package fabcar.tar.gz --path github.com/hyperledger/fabric-samples/chaincode/fabcar/go/ --lang golang --label fabcar_1

ls查看当前目录，发现有了一个fabcar.tar.gz文件

安装智能合约（时间会比较久，耐心稍等）

peer lifecycle chaincode install fabcar.tar.gz

成功后返回status:200等信息

当前组织同意合约定义（需要用到上面一部返回的Package id）

peer lifecycle chaincode approveformyorg --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 --channelID mychannel --name fabcar --version 1 --init-required --package-id fabcar_1:b5e31331cf476adea4e444c824067b68dc0f4cbc3b61bd773c90d5b4d3761a31 --sequence 1 –waitForEvent

此时检查合约定义是否满足策略

peer lifecycle chaincode checkcommitreadiness --channelID mychannel --name fabcar --version 1 --sequence 1 --output json --init-required

返回

Org2MSP这里显示未同意合约定义
那么需要进入Org2中的环境配置中重复合约安装并同意合约定义

切换环境到Org2

切换环境变量为peer0.org2.example.com的配置

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.crtexport CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/users/Admin@org2.example.com/mspexport CORE_PEER_ADDRESS=peer0.org2.example.com:9051

组织2（Org2）部署智能合约

由于Org1已经打包了智能合约，Org2直接安装就可

peer lifecycle chaincode install fabcar.tar.gz

当前组织同意合约定义

peer lifecycle chaincode approveformyorg --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 --channelID mychannel --name fabcar --version 1 --init-required --package-id fabcar_1:b5e31331cf476adea4e444c824067b68dc0f4cbc3b61bd773c90d5b4d3761a31 --sequence 1 –waitForEvent

再次检查合约定义是否满足策略

peer lifecycle chaincode checkcommitreadiness --channelID mychannel --name fabcar --version 1 --sequence 1 --output json --init-required

返回

过半数组织同意了智能合约定义
那么可以提交智能合约

peer lifecycle chaincode commit -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 --channelID mychannel --name fabcar --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 --version 1 --sequence 1 --init-required

成功后初始化智能合约

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 mychannel -n fabcar --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 --isInit -c '{"Args":["InitLedger"]}'

至此智能合约部署完成

调用智能合约

查询所有汽车

peer chaincode query -C mychannel -n fabcar -c '{"Args":["QueryAllCars"]}'

查询成功结果

查询单部汽车

peer chaincode query -C mychannel -n fabcar -c '{"Args":["QueryCar","CAR0"]}'

查询成功结果

新增一辆汽车

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 mychannel -n fabcar --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":["CreateCar","CAR10","GEELY","Borui","Blue","Yujialing"]}'

查询刚刚新增的车辆

peer chaincode query -C mychannel -n fabcar -c '{"Args":["QueryCar","CAR10"]}'

查询成功返回结果

更改刚刚新增车辆CAR10的车主为“广东靓仔”

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 mychannel -n fabcar --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":["ChangeCarOwner","CAR10","广东靓仔"]}'

再次查看CAR10信息看是否修改车主成功

peer chaincode query -C mychannel -n fabcar -c '{"Args":["QueryCar","CAR10"]}'

其他用go语言编写的智能合约也是相同的操作
Hyperledger Fabric 2.0的fabcar实践至此结束
欢迎讨论与批评指正！！！