MarblesPrivateChaincode example Chaincode implementation
type MarblesPrivateChaincode struct {
}
func (t *MarblesPrivateChaincode) Init(stub shim.ChaincodeStubInterface) pb.Response
Init initializes chaincode ===========================
func (t *MarblesPrivateChaincode) Invoke(stub shim.ChaincodeStubInterface) pb.Response
Invoke - Our entry point for Invocations ========================================