service

type ApiDescription struct {
	Protocol string
	Address  string
	ApiList  []ApiInterface
}

type ApiInterface struct {
	Description string
	Path        string
	Method      string
	Parameters  Parameters
}

type BasicInformation struct {
	Name        string
	Description string
	Settings    interface{}
	Api         ApiDescription
	SubServices []BasicInformation
}

type BlankService struct{}

type IService interface {
	//service name, this is the ID that registered to engine
	Name() (name string)

	//build request list for consensus network, engine will call this method when you are a consensus leader
	RequestsForConsensus(lastReqs []interface{}) (req [][]byte, cnt uint32)

	//receive and verify request from consensus network (on the other word, this request comes from consensus leader)
	PreExecute(req interface{}) (result []byte, err error)

	//receive and execute confirmed request of this round of consensus
	Execute(req interface{}) (result []byte, err error)

	//handle consensus failed
	Cancel(req interface{}) (err error)

	//service information
	Information() (info BasicInformation)
}

type Parameters http.Parameters