Very basic foutain

2019-09-20 23:27:40 +02:00 · 2019-09-20 23:27:40 +02:00 · 82dc6fa527
commit 82dc6fa527
parent 4202da62cd
1 changed files with 142 additions and 0 deletions
--- a/cmd/lotus-fountain/main.go
+++ b/cmd/lotus-fountain/main.go
@ -0,0 +1,142 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"os"
+
+	logging "github.com/ipfs/go-log"
+	"golang.org/x/xerrors"
+	"gopkg.in/urfave/cli.v2"
+
+	"github.com/filecoin-project/go-lotus/api"
+	"github.com/filecoin-project/go-lotus/build"
+	"github.com/filecoin-project/go-lotus/chain/address"
+	"github.com/filecoin-project/go-lotus/chain/types"
+	lcli "github.com/filecoin-project/go-lotus/cli"
+)
+
+var log = logging.Logger("main")
+
+var sendPerRequest = types.NewInt(5_000_000)
+
+func main() {
+	logging.SetLogLevel("*", "INFO")
+
+	log.Info("Starting fountain")
+
+	local := []*cli.Command{
+		runCmd,
+	}
+
+	app := &cli.App{
+		Name:    "lotus-fountain",
+		Usage:   "Devnet token distribution utility",
+		Version: build.Version,
+		Flags: []cli.Flag{
+			&cli.StringFlag{
+				Name:    "repo",
+				EnvVars: []string{"LOTUS_PATH"},
+				Value:   "~/.lotus", // TODO: Consider XDG_DATA_HOME
+			},
+		},
+
+		Commands: local,
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		log.Warn(err)
+		return
+	}
+}
+
+var runCmd = &cli.Command{
+	Name:  "run",
+	Usage: "Start lotus fountain",
+	Flags: []cli.Flag{
+		&cli.StringFlag{
+			Name:  "front",
+			Value: "127.0.0.1:7777",
+		},
+		&cli.StringFlag{
+			Name: "from",
+		},
+	},
+	Action: func(cctx *cli.Context) error {
+		nodeApi, err := lcli.GetFullNodeAPI(cctx)
+		if err != nil {
+			return err
+		}
+		ctx := lcli.ReqContext(cctx)
+
+		v, err := nodeApi.Version(ctx)
+		if err != nil {
+			return err
+		}
+
+		log.Info("Remote version: %s", v.Version)
+
+		from, err := address.NewFromString(cctx.String("from"))
+		if err != nil {
+			return xerrors.Errorf("parsing source address (provide correct --from flag!): %w", err)
+		}
+
+		h := &handler{
+			ctx:  ctx,
+			api:  nodeApi,
+			from: from,
+		}
+
+		http.HandleFunc("/", h.index)
+		http.HandleFunc("/send", h.send)
+
+		fmt.Printf("Open http://%s\n", cctx.String("front"))
+
+		go func() {
+			<-ctx.Done()
+			os.Exit(0)
+		}()
+
+		return http.ListenAndServe(cctx.String("front"), nil)
+	},
+}
+
+type handler struct {
+	ctx context.Context
+	api api.FullNode
+
+	from address.Address
+}
+
+func (h *handler) index(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "<!DOCTYPE html>\n<html><head><title>Lotus Fountain</title><style>body {font-family: 'monospace';}</style></head><body>")
+	fmt.Fprintf(w, "<form action='/send' method='get'>Enter destination address: ")
+	fmt.Fprintf(w, "<input type='text' name='address'><br><button type='submit'>Send</button>")
+	fmt.Fprintf(w, "</form></body></html>")
+}
+
+func (h *handler) send(w http.ResponseWriter, r *http.Request) {
+	to, err := address.NewFromString(r.FormValue("address"))
+	if err != nil {
+		w.WriteHeader(400)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	smsg, err := h.api.MpoolPushMessage(h.ctx, &types.Message{
+		Value: sendPerRequest,
+		From:  h.from,
+		To:    to,
+
+		GasPrice: types.NewInt(0),
+		GasLimit: types.NewInt(1000),
+	})
+	if err != nil {
+		w.WriteHeader(400)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	w.Write([]byte(smsg.Cid().String()))
+}