script.sh脚本的执行是对e2e.cli中真正地对Peer节点、频道以及合约的集合操作演示,官方出版的该脚本试图通过这样的方式来指导开发人员尽快入门
在script.sh脚本中,一共执行了9个函数,分别为:
- createChannel genju 根据之前在generateArtifacts.sh 脚本中通过 configtx.yaml 配置文件生成的频道文件创建频道。
- joinChannel Peer 节点加入指定频道
- updateAnchorPeers 0 为频道中的每个组织设置Peer节点
- updateAnchorPeers 2 同上,但是不同的是组织节点
- installChaincode 2 在Peer0/Org1和Peer2/Org2 上安装智能合约
- instantiateChaincode 2 在Peer2/Org2 上对智能合约进行实例化操作。
- chaincodeQuery 0 100 在Peer0/Org1上执行智能合约中的交易方法。
- chaincodeInvoke 0 在Peer0/Org1上执行智能合约中的交易方法。
- installChaincode 3 在Peer3/Org2 上安装之恩那个合约
- chaincodeQuery 3 90 在Peer3/Org2上执行智能合约中的查询方法
以上9个函数的最开头,都会有类似:
setGlobals 0
这样的一个设置全局环境变量的方法。那么这个方法究竟是如何运作的呢?下文将会对该方法做详细分析。
setGlobals 详解
首先我们看setGlobals代码定义:
setGlobals () {
if [ $1 -eq 0 -o $1 -eq 1 ] ; then
CORE_PEER_LOCALMSPID="Org1MSP"
CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
if [ $1 -eq 0 ]; then
CORE_PEER_ADDRESS=peer0.org1.example.com:7051
else
CORE_PEER_ADDRESS=peer1.org1.example.com:7051
fi
else
CORE_PEER_LOCALMSPID="Org2MSP"
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
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp
if [ $1 -eq 2 ]; then
CORE_PEER_ADDRESS=peer0.org2.example.com:7051
else
CORE_PEER_ADDRESS=peer1.org2.example.com:7051
fi
fi
env |grep CORE
}
我们进行逐行分析:
if [ $1 -eq 0 -o $1 -eq 1 ] ; then
CORE_PEER_LOCALMSPID="Org1MSP"
CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
if [ $1 -eq 0 ]; then
CORE_PEER_ADDRESS=peer0.org1.example.com:7051
else
CORE_PEER_ADDRESS=peer1.org1.example.com:7051
fi
如果后缀参数equal 0或者1的话,设置参数:
CORE_PEER_LOCALMSPID=“Org1MSP”
CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
更进一步,如果是0,则设置:
CORE_PEER_ADDRESS=peer0.org1.example.com:7051
如果是1,则设置:
CORE_PEER_ADDRESS=peer1.org1.example.com:7051
else
CORE_PEER_LOCALMSPID="Org2MSP"
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
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp
if [ $1 -eq 2 ]; then
CORE_PEER_ADDRESS=peer0.org2.example.com:7051
else
CORE_PEER_ADDRESS=peer1.org2.example.com:7051
fi
fi
如果后缀参数不是0也不是1,则设置:
CORE_PEER_LOCALMSPID=“Org2MSP”
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
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp
如果后缀参数是2,则设置:
CORE_PEER_ADDRESS=peer0.org2.example.com:7051
不为2的话,设置:
CORE_PEER_ADDRESS=peer1.org2.example.com:7051
总结
其实总而言之setGlobals函数就用后缀0,1,2区分了不同Orgs组织和不同节点的配置参数。其中,用0代表:
CORE_PEER_LOCALMSPID=“Org1MSP”
CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
CORE_PEER_ADDRESS=peer0.org1.example.com:7051
用1代表:
CORE_PEER_LOCALMSPID=“Org1MSP”
CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
CORE_PEER_ADDRESS=peer1.org1.example.com:7051
用2代表:
CORE_PEER_LOCALMSPID=“Org2MSP”
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
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp
CORE_PEER_ADDRESS=peer0.org2.example.com:7051
不为0,1,2代表:
CORE_PEER_LOCALMSPID=“Org2MSP”
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
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp
CORE_PEER_ADDRESS=peer1.org2.example.com:7051