mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-28 22:27:17 +00:00
91 lines
2.9 KiB
Go
91 lines
2.9 KiB
Go
package sync
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import (
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"context"
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"reflect"
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"time"
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libp2pcore "github.com/libp2p/go-libp2p-core"
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"github.com/libp2p/go-libp2p-core/network"
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pb "github.com/prysmaticlabs/prysm/proto/beacon/p2p/v1"
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"github.com/prysmaticlabs/prysm/shared/roughtime"
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"go.opencensus.io/trace"
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)
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// Time to first byte timeout. The maximum time to wait for first byte of
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// request response (time-to-first-byte). The client is expected to give up if
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// they don't receive the first byte within 5 seconds.
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var ttfbTimeout = 5 * time.Second
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// rpcHandler is responsible for handling and responding to any incoming message.
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// This method may return an error to internal monitoring, but the error will
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// not be relayed to the peer.
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type rpcHandler func(context.Context, interface{}, libp2pcore.Stream) error
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// registerRPCHandlers for p2p RPC.
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func (r *RegularSync) registerRPCHandlers() {
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r.registerRPC(
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"/eth2/beacon_chain/req/hello/1",
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&pb.Hello{},
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r.helloRPCHandler,
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)
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r.registerRPC(
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"/eth2/beacon_chain/req/goodbye/1",
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&pb.Goodbye{},
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r.goodbyeRPCHandler,
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)
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r.registerRPC(
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"/eth2/beacon_chain/req/beacon_blocks/1",
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&pb.BeaconBlocksRequest{},
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r.beaconBlocksRPCHandler,
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)
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r.registerRPC(
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"/eth2/beacon_chain/req/recent_beacon_blocks/1",
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[][32]byte{},
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r.recentBeaconBlocksRPCHandler,
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)
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}
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// registerRPC for a given topic with an expected protobuf message type.
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func (r *RegularSync) registerRPC(topic string, base interface{}, handle rpcHandler) {
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topic += r.p2p.Encoding().ProtocolSuffix()
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log := log.WithField("topic", topic)
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r.p2p.SetStreamHandler(topic, func(stream network.Stream) {
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ctx, cancel := context.WithTimeout(context.Background(), ttfbTimeout)
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defer cancel()
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defer stream.Close()
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ctx, span := trace.StartSpan(ctx, "sync.rpc")
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defer span.End()
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span.AddAttributes(trace.StringAttribute("topic", topic))
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if err := stream.SetReadDeadline(roughtime.Now().Add(ttfbTimeout)); err != nil {
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log.WithError(err).Error("Could not set stream read deadline")
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return
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}
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// Given we have an input argument that can be pointer or [][32]byte, this gives us
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// a way to check for its reflect.Kind and based on the result, we can decode
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// accordingly.
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t := reflect.TypeOf(base)
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if t.Kind() == reflect.Ptr {
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msg := reflect.New(t.Elem())
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if err := r.p2p.Encoding().DecodeWithLength(stream, msg.Interface()); err != nil {
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log.WithError(err).Error("Failed to decode stream message")
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return
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}
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if err := handle(ctx, msg.Interface(), stream); err != nil {
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log.WithError(err).Error("Failed to handle p2p RPC")
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}
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} else {
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msg := reflect.New(t)
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if err := r.p2p.Encoding().DecodeWithLength(stream, msg.Interface()); err != nil {
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log.WithError(err).Error("Failed to decode stream message")
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return
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}
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if err := handle(ctx, msg.Elem().Interface(), stream); err != nil {
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log.WithError(err).Error("Failed to handle p2p RPC")
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}
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}
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})
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}
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