Can't invoke chaincode from SDK - hyperledger-fabric

Question

I can invoke chaincode from my peer by the following command:
peer chaincode invoke -o coreOrderer.dip.com:7050 --tls --cafile /etc/hyperledger/tlsca.dip.com-cert.pem --tlsRootCertFiles /etc/hyperledger/fabric/tls/ca.crt -C dipchannel -n mycc --peerAddresses peer0.core.dip.com:7051 -c '{"Args":["query","a"]}'
And it works, I can see in the peer logs:
Entry chaincode: name:"mycc"
Exit chaincode: name:"mycc" (2ms)
And I can see result of this invoke in my chaincode container.
But when I'm trying to invoke from my code by SDK
req := channel.Request{
ChaincodeID: "mycc",
Fcn: "query",
Args: [][]byte{[]byte("a")},
}
resp, err := client.Execute(req)
I have empty response, and in the peer log I see:
Entry chaincode: name:"cscc"
Exit chaincode: name:"cscc" (1ms)
Entry chaincode: name:"lscc"
Exit chaincode: name:"lscc" (1ms)
Why it is calling "cscc" and "lscc" chaincodes and doesn't call to "mycc" ?

Answer 1

check this below are System Chaincodes
LSCC Lifecycle system chaincode handles lifecycle requests described above. >>> Chaincode lifecycle
CSCC Configuration system chaincode handles channel configuration on the peer side. >>> which helps regulate access control
QSCC Query system chaincode provides ledger query APIs such as getting blocks and transactions.
Note: In particular, install, instantiate and upgrade do not apply to system chaincodes.
System chaincode is used in Hyperledger Fabric to implement a number of system behaviors so that they can be replaced or modified as appropriate by a system integrator.
Unlike a user chaincode, a system chaincode is not installed and instantiated using proposals from SDKs or CLI. It is registered and deployed by the peer at start-up
COMING to your query >>>>
Check whether you are providing identity or not, as it enters into CSCC which is a regulator for ACL
Check below my code snippet
func (setup *FabricSetup) Query() (string, error) {
// Channel client is used to query and execute transactions
clientContext := setup.sdk.ChannelContext(setup.ChannelID, fabsdk.WithUser(setup.OrgAdmin))
client, err := channel.New(clientContext)
setup.client = client
// Prepare arguments
var args []string
args = append(args, "queryRate")
args = append(args, "001")
response, err := setup.client.Query(
channel.Request{
ChaincodeID: setup.ChainCodeID,
Fcn: args[0],
Args: [][]byte{[]byte(args[1])},
},
)
if err != nil {
return "", fmt.Errorf("failed to query: %v", err)
}
return string(response.Payload), nil
}