begin adding simple api server for deal stats

cmd/lotus-shed/dealtracker.go

@@ -0,0 +1,78 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+
+	"github.com/filecoin-project/lotus/api"
+	lcli "github.com/filecoin-project/lotus/cli"
+	"github.com/urfave/cli/v2"
+)
+
+type dealStatsServer struct {
+	api api.FullNode
+}
+
+type dealCountResp struct {
+	Total int64 `json:"total"`
+	Epoch int64 `json:"epoch"`
+}
+
+func (dss *dealStatsServer) handleStorageDealCount(w http.ResponseWriter, r *http.Request) {
+	ctx := context.Background()
+
+	head, err := dss.api.ChainHead(ctx)
+	if err != nil {
+		log.Warnf("failed to get chain head: %s", err)
+		w.WriteHeader(500)
+		return
+	}
+
+	deals, err := dss.api.StateMarketDeals(ctx, head.Key())
+	if err != nil {
+		log.Warnf("failed to get market deals: %s", err)
+		w.WriteHeader(500)
+		return
+	}
+
+	if err := json.NewEncoder(w).Encode(&dealCountResp{
+		Total: int64(len(deals)),
+		Epoch: int64(head.Height()),
+	}); err != nil {
+		log.Warnf("failed to write back deal count response: %s", err)
+		return
+	}
+}
+
+func (dss *dealStatsServer) handleStorageDealAverageSize(w http.ResponseWriter, r *http.Request) {
+
+}
+
+func (dss *dealStatsServer) handleStorageDealTotalReal(w http.ResponseWriter, r *http.Request) {
+
+}
+
+var serveDealStatsCmd = &cli.Command{
+	Name:  "serve-deal-stats",
+	Flags: []cli.Flag{},
+	Action: func(cctx *cli.Context) error {
+		api, closer, err := lcli.GetFullNodeAPI(cctx)
+		if err != nil {
+			return err
+		}
+
+		defer closer()
+		ctx := lcli.ReqContext(cctx)
+
+		_ = ctx
+
+		dss := &dealStatsServer{api}
+
+		http.HandleFunc("/api/storagedeal/count", dss.handleStorageDealCount)
+		http.HandleFunc("/api/storagedeal/averagesize", dss.handleStorageDealAverageSize)
+		http.HandleFunc("/api/storagedeal/totalreal", dss.handleStorageDealTotalReal)
+
+		panic(http.ListenAndServe(":7272", nil))
+	},
+}

cmd/lotus-shed/main.go

@@ -36,6 +36,7 @@ func main() {
 		mpoolStatsCmd,
 		exportChainCmd,
 		consensusCmd,
+		serveDealStatsCmd,
 	}
 
 	app := &cli.App{