Add election run-dummy command

Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>

cmd/lotus-shed/election.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"encoding/binary"
+	"fmt"
+
+	"github.com/filecoin-project/lotus/chain/types"
+	lcli "github.com/filecoin-project/lotus/cli"
+	"github.com/urfave/cli/v2"
+	"golang.org/x/xerrors"
+)
+
+var electionCmd = &cli.Command{
+	Name:  "election",
+	Usage: "commands related to leader election",
+	Subcommands: []*cli.Command{
+		electionRunDummy,
+	},
+}
+
+var electionRunDummy = &cli.Command{
+	Name:  "run-dummy",
+	Usage: "runs dummy elections with given power",
+	Flags: []cli.Flag{
+		&cli.StringFlag{
+			Name: "network-power",
+		},
+		&cli.StringFlag{
+			Name: "miner-power",
+		},
+		&cli.Uint64Flag{
+			Name:  "seed",
+			Value: 4,
+		},
+	},
+	Action: func(cctx *cli.Context) error {
+		ctx := lcli.ReqContext(cctx)
+		minerPow, err := types.BigFromString(cctx.String("miner-power"))
+		if err != nil {
+			return xerrors.Errorf("decoding miner-power: %w", err)
+		}
+		networkPow, err := types.BigFromString(cctx.String("network-power"))
+		if err != nil {
+			return xerrors.Errorf("decoding miner-power: %w", err)
+		}
+
+		ep := &types.ElectionProof{}
+		ep.VRFProof = make([]byte, 32)
+		binary.BigEndian.PutUint64(ep.VRFProof, cctx.Uint64("seed"))
+
+		i := uint64(0)
+		for {
+			if ctx.Err() != nil {
+				return ctx.Err()
+			}
+			binary.BigEndian.PutUint64(ep.VRFProof[8:], i)
+			j := ep.ComputeWinCount(minerPow, networkPow)
+			_, err := fmt.Printf("%t, %d\n", j != 0, j)
+			if err != nil {
+				return err
+			}
+			i++
+		}
+	},
+}

cmd/lotus-shed/main.go

@@ -46,6 +46,7 @@ func main() {
 		ledgerCmd,
 		sectorsCmd,
 		msgCmd,
+		electionCmd,
 	}
 
 	app := &cli.App{