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터미널1. docker 이미지 재시작

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​[Ctrl+C]를 클릭하여 종료한다.

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peer         | 2019-03-20 09:33:40.640 UTC [msp.identity] Sign -> DEBU dc9c Sign: digest: D18B553283AFC791A71A1AB3F379E85F4599DAAE3CE5B43F6A912E5BFD23E73D
^CGracefully stopping... (press Ctrl+C again to force)
Stopping chaincode ... done
Stopping cli       ... done
Stopping peer      ... done
Stopping orderer   ... done
root@leelab:~/hyperledger/fabric-samples/chaincode-docker-devmode# docker-compose -f docker-compose-simple.yaml down
Removing chaincode ... done
Removing cli       ... done
Removing peer      ... done
Removing orderer   ... done
Removing network chaincodedockerdevmode_default
root@leelab:~/hyperledger/fabric-samples/chaincode-docker-devmode#

​root@leelab:~/hyperledger/fabric-samples/chaincode-docker-devmode# docker-compose -f docker-compose-simple.yaml up

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터미널3. 체인코드 수정

docker 이미지에서 빠져나온다.

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root@38811b1c6e63:/opt/gopath/src/chaincodedev# exit
exit
root@client:~/hyperledger/fabric-samples/chaincode-docker-devmode# cd ../chaincode/chaincode_example02/go
root@client:~/hyperledger/fabric-samples/chaincode/chaincode_example02/go# 

root@client:~/hyperledger/fabric-samples/chaincode/chaincode_example02/go# vi chaincode_example02.go

func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface) pb.Response {
        fmt.Println("ex02 Invoke")
        function, args := stub.GetFunctionAndParameters()
        if function == "invoke" {
                // Make payment of X units from A to B
                return t.invoke(stub, args)
        } else if function == "delete" {
                // Deletes an entity from its state
                return t.delete(stub, args)
        } else if function == "query" {
                // the old "Query" is now implemtned in invoke
                return t.query(stub, args)
        } else if function == "reg" {
                // reg
                return t.reg(stub, args)
        }

        return shim.Error("Invalid invoke function name. Expecting \"invoke\" \"delete\" \"query\"")
}
// reg
func (t *SimpleChaincode) reg(stub shim.ChaincodeStubInterface, args []string) pb.Response {
    var A string    // Entities
    var Aval int // Asset holdings
    var err error

    if len(args) != 2 {
        return shim.Error("Incorrect number of arguments. Expecting 2")
    }

    A = args[0]

    Aval, err = strconv.Atoi(args[1])
    if err != nil {
        return shim.Error("Expecting integer value for asset holding")
    }

    fmt.Printf("New value = %d\n", Aval)

    // Write the state back to the ledger
    err = stub.PutState(A, []byte(strconv.Itoa(Aval)))
    if err != nil {
        return shim.Error(err.Error())
    }

    return shim.Success(nil)
} 

터미널2. 체인코드 빌드 및 시작

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현재 실행된 체인코드를 중지한다. (Ctrl+C)키를 누른다.

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​ex02 Init
Aval = 100, Bval = 200
ex02 Invoke
Aval = 90, Bval = 210
ex02 Invoke
Query Response:{"Name":"a","Amount":"90"}
^C
root@415af2cc7fec:/opt/gopath/src/chaincode# cd chaincode_example02/go
root@415af2cc7fec:/opt/gopath/src/chaincode/chaincode_example02/go# go build -o chaincode_example02

​root@ccd6d17781d6:/opt/gopath/src/chaincode/chaincode_example02/go# CORE_PEER_ADDRESS=peer:7052 CORE_CHAINCODE_ID_NAME=mycc:0 ./chaincode_example02
2019-11-14 02:50:53.890 UTC [shim] setupChaincodeLogging -> INFO 001 Chaincode log level not provided; defaulting to: INFO
2019-11-14 02:50:53.894 UTC [shim] setupChaincodeLogging -> INFO 002 Chaincode (build level: ) starting up ...
2019-11-14 02:50:53.895 UTC [bccsp] initBCCSP -> DEBU 001 Initialize BCCSP [SW]
2019-11-14 02:50:53.895 UTC [grpc] DialContext -> DEBU 002 parsed scheme: ""
2019-11-14 02:50:53.895 UTC [grpc] DialContext -> DEBU 003 scheme "" not registered, fallback to default scheme
2019-11-14 02:50:53.896 UTC [grpc] watcher -> DEBU 004 ccResolverWrapper: sending new addresses to cc: [{peer:7052 0  <nil>}]
2019-11-14 02:50:53.896 UTC [grpc] switchBalancer -> DEBU 005 ClientConn switching balancer to "pick_first"
2019-11-14 02:50:53.896 UTC [grpc] HandleSubConnStateChange -> DEBU 006 pickfirstBalancer: HandleSubConnStateChange: 0xc00035a2a0, CONNECTING
2019-11-14 02:50:53.935 UTC [grpc] HandleSubConnStateChange -> DEBU 007 pickfirstBalancer: HandleSubConnStateChange: 0xc00035a2a0, READY

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​터미널3. chaincode 사용

[root@leelab chaincode-docker-devmode]# docker exec -it cli bash
root@f75979e099b9:/opt/gopath/src/chaincodedev#

# peer chaincode install -p chaincodedev/chaincode/chaincode_example02/go -n mycc -v 0
# peer chaincode instantiate -n mycc -v 0 -c '{"Args":["init","a","100","b","200"]}' -C myc

초기값 a=100, b=200

# peer chaincode invoke -n mycc -c '{"Args":["reg","c","1000"]}' -C myc

2019-03-20 12:42:17.753 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 0a7 Chaincode invoke successful. result: status:200
root@7183c9147d90:/opt/gopath/src/chaincodedev#

터미널2의 로그를 확인한다. 

ex02 Init
Aval = 100, Bval = 200
ex02 Invoke
New value = 1000