mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2025-01-09 11:11:20 +00:00
71 lines
2.4 KiB
Go
71 lines
2.4 KiB
Go
|
package beacon
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"log"
|
||
|
|
"net/http"
|
||
|
|
"strconv"
|
||
|
|
|
||
|
|
"github.com/ethereum/go-ethereum/common/hexutil"
|
||
|
|
"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
|
||
|
|
"github.com/prysmaticlabs/prysm/v4/beacon-chain/rpc/eth/shared"
|
||
|
|
"github.com/prysmaticlabs/prysm/v4/config/params"
|
||
|
|
http2 "github.com/prysmaticlabs/prysm/v4/network/http"
|
||
|
|
"github.com/prysmaticlabs/prysm/v4/time/slots"
|
||
|
|
"go.opencensus.io/trace"
|
||
|
|
)
|
||
|
|
|
||
|
|
// GetWeakSubjectivity computes the starting epoch of the current weak subjectivity period, and then also
|
||
|
|
// determines the best block root and state root to use for a Checkpoint Sync starting from that point.
|
||
|
|
func (s *Server) GetWeakSubjectivity(w http.ResponseWriter, r *http.Request) {
|
||
|
|
ctx, span := trace.StartSpan(r.Context(), "beacon.GetWeakSubjectivity")
|
||
|
|
defer span.End()
|
||
|
|
|
||
|
|
if shared.IsSyncing(ctx, w, s.SyncChecker, s.HeadFetcher, s.TimeFetcher, s.OptimisticModeFetcher) {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
hs, err := s.HeadFetcher.HeadStateReadOnly(ctx)
|
||
|
|
if err != nil {
|
||
|
|
http2.HandleError(w, "Could not get head state: "+err.Error(), http.StatusInternalServerError)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
wsEpoch, err := helpers.LatestWeakSubjectivityEpoch(ctx, hs, params.BeaconConfig())
|
||
|
|
if err != nil {
|
||
|
|
http2.HandleError(w, "Could not get weak subjectivity epoch: "+err.Error(), http.StatusInternalServerError)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
wsSlot, err := slots.EpochStart(wsEpoch)
|
||
|
|
if err != nil {
|
||
|
|
http2.HandleError(w, "Could not get weak subjectivity slot: "+err.Error(), http.StatusInternalServerError)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
cbr, err := s.CanonicalHistory.BlockRootForSlot(ctx, wsSlot)
|
||
|
|
if err != nil {
|
||
|
|
http2.HandleError(w, fmt.Sprintf("Could not find highest block below slot %d: %s", wsSlot, err.Error()), http.StatusInternalServerError)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
cb, err := s.BeaconDB.Block(ctx, cbr)
|
||
|
|
if err != nil {
|
||
|
|
http2.HandleError(
|
||
|
|
w,
|
||
|
|
fmt.Sprintf("Block with root %#x from slot index %d not found in db: %s", cbr, wsSlot, err.Error()),
|
||
|
|
http.StatusInternalServerError,
|
||
|
|
)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
stateRoot := cb.Block().StateRoot()
|
||
|
|
log.Printf("Weak subjectivity checkpoint reported as epoch=%d, block root=%#x, state root=%#x", wsEpoch, cbr, stateRoot)
|
||
|
|
|
||
|
|
resp := &GetWeakSubjectivityResponse{
|
||
|
|
Data: &WeakSubjectivityData{
|
||
|
|
WsCheckpoint: &shared.Checkpoint{
|
||
|
|
Epoch: strconv.FormatUint(uint64(wsEpoch), 10),
|
||
|
|
Root: hexutil.Encode(cbr[:]),
|
||
|
|
},
|
||
|
|
StateRoot: hexutil.Encode(stateRoot[:]),
|
||
|
|
},
|
||
|
|
}
|
||
|
|
http2.WriteJson(w, resp)
|
||
|
|
}
|