121 lines
2.9 KiB
Go
121 lines
2.9 KiB
Go
package main
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import (
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"context"
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"encoding/json"
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"fmt"
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"os"
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"time"
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cborutil "github.com/filecoin-project/go-cbor-util"
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"github.com/filecoin-project/lotus/blockstore"
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"github.com/filecoin-project/lotus/chain/consensus/filcns"
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"github.com/filecoin-project/lotus/chain/store"
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lcli "github.com/filecoin-project/lotus/cli"
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"github.com/filecoin-project/lotus/node/hello"
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"github.com/ipfs/go-datastore"
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"github.com/libp2p/go-libp2p"
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"github.com/libp2p/go-libp2p-core/host"
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inet "github.com/libp2p/go-libp2p-core/network"
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"github.com/libp2p/go-libp2p-core/peer"
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"github.com/urfave/cli/v2"
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"golang.org/x/xerrors"
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)
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var resultCh chan bool
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var helloCmd = &cli.Command{
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Name: "hello",
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Description: "Get remote peer hello message by multiaddr",
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Flags: []cli.Flag{
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&cli.StringFlag{
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Name: "multiaddr",
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Usage: "remote peer multiaddr",
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Required: true,
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},
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&cli.StringFlag{
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Name: "genesis-path",
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Usage: "genesis car file path",
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},
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},
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Action: func(cctx *cli.Context) error {
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ctx := lcli.ReqContext(cctx)
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resultCh = make(chan bool, 1)
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cf := cctx.String("genesis-path")
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f, err := os.OpenFile(cf, os.O_RDONLY, 0664)
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if err != nil {
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return xerrors.Errorf("opening the car file: %w", err)
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}
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bs := blockstore.FromDatastore(datastore.NewMapDatastore())
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cs := store.NewChainStore(bs, bs, datastore.NewMapDatastore(), filcns.Weight, nil)
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ts, err := cs.Import(cctx.Context, f)
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if err != nil {
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return err
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}
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pis, err := lcli.AddrInfoFromArg(ctx, cctx)
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if err != nil {
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return err
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}
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h, err := libp2p.New()
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if err != nil {
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return err
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}
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err = h.Connect(ctx, pis[0])
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if err != nil {
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return err
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}
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h.SetStreamHandler(hello.ProtocolID, HandleStream)
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weight, err := cs.Weight(ctx, ts)
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if err != nil {
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return err
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}
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gen := ts.Blocks()[0]
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hmsg := &hello.HelloMessage{
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HeaviestTipSet: ts.Cids(),
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HeaviestTipSetHeight: ts.Height(),
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HeaviestTipSetWeight: weight,
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GenesisHash: gen.Cid(),
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}
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err = SayHello(ctx, pis[0].ID, h, hmsg)
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if err != nil {
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return err
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}
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ctx, done := context.WithTimeout(ctx, 5*time.Second)
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defer done()
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select {
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case <-resultCh:
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case <-ctx.Done():
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fmt.Println("can't get hello message, please try again")
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}
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return nil
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},
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}
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func HandleStream(s inet.Stream) {
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var hmsg hello.HelloMessage
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if err := cborutil.ReadCborRPC(s, &hmsg); err != nil {
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log.Infow("failed to read hello message, disconnecting", "error", err)
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_ = s.Conn().Close()
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return
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}
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data, err := json.Marshal(hmsg)
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if err != nil {
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return
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}
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fmt.Println(string(data))
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resultCh <- true
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}
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func SayHello(ctx context.Context, pid peer.ID, h host.Host, hmsg *hello.HelloMessage) error {
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s, err := h.NewStream(ctx, pid, hello.ProtocolID)
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if err != nil {
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return xerrors.Errorf("error opening stream: %w", err)
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}
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if err := cborutil.WriteCborRPC(s, hmsg); err != nil {
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return xerrors.Errorf("writing rpc to peer: %w", err)
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}
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return nil
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}
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