receipt

type MongoCollection interface {
	Insert(...interface{}) error
	Create(info *mgo.CollectionInfo) error
	EnsureIndex(index mgo.Index) error
	Find(query interface{}) MongoQuery
}

type MongoDatabase interface {
	Connect(url string, timeout time.Duration) error
	GetCollection(database string, collection string) MongoCollection
}

type MongoQuery interface {
	Limit(n int) *mgo.Query
	Skip(n int) *mgo.Query
	Sort(fields ...string) *mgo.Query
	All(result interface{}) error
	One(result interface{}) error
}

type Store interface {
	Init(ws.WebSocketChannels, ...api.ReceiptStorePersistence) error
	ValidateConf() error
	ProcessReceipt(msgBytes []byte)
	GetReceipts(res http.ResponseWriter, req *http.Request, params httprouter.Params)
	GetReceipt(res http.ResponseWriter, req *http.Request, params httprouter.Params)
	Close()
}