code.vegaprotocol.io/vega@v0.79.0/core/epochtime/snapshot.go (about)

     1  // Copyright (C) 2023 Gobalsky Labs Limited
     2  //
     3  // This program is free software: you can redistribute it and/or modify
     4  // it under the terms of the GNU Affero General Public License as
     5  // published by the Free Software Foundation, either version 3 of the
     6  // License, or (at your option) any later version.
     7  //
     8  // This program is distributed in the hope that it will be useful,
     9  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    10  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    11  // GNU Affero General Public License for more details.
    12  //
    13  // You should have received a copy of the GNU Affero General Public License
    14  // along with this program.  If not, see <http://www.gnu.org/licenses/>.
    15  
    16  package epochtime
    17  
    18  import (
    19  	"context"
    20  
    21  	"code.vegaprotocol.io/vega/core/types"
    22  	"code.vegaprotocol.io/vega/libs/proto"
    23  	"code.vegaprotocol.io/vega/protos/vega"
    24  )
    25  
    26  func (s *Svc) serialise() error {
    27  	s.state.Seq = s.epoch.Seq
    28  	s.state.StartTime = s.epoch.StartTime
    29  	s.state.ExpireTime = s.epoch.ExpireTime
    30  	s.state.ReadyToStartNewEpoch = s.readyToStartNewEpoch
    31  	s.state.ReadyToEndEpoch = s.readyToEndEpoch
    32  
    33  	data, err := proto.Marshal(s.pl.IntoProto())
    34  	if err != nil {
    35  		return err
    36  	}
    37  
    38  	s.data = data
    39  	return nil
    40  }
    41  
    42  func (s *Svc) Namespace() types.SnapshotNamespace {
    43  	return types.EpochSnapshot
    44  }
    45  
    46  func (s *Svc) Keys() []string {
    47  	return []string{s.pl.Key()}
    48  }
    49  
    50  func (s *Svc) Stopped() bool {
    51  	return false
    52  }
    53  
    54  func (s *Svc) GetState(k string) ([]byte, []types.StateProvider, error) {
    55  	if k != s.pl.Key() {
    56  		return nil, nil, types.ErrSnapshotKeyDoesNotExist
    57  	}
    58  	s.serialise()
    59  	return s.data, nil, nil
    60  }
    61  
    62  func (s *Svc) LoadState(ctx context.Context, payload *types.Payload) ([]types.StateProvider, error) {
    63  	if s.Namespace() != payload.Data.Namespace() {
    64  		return nil, types.ErrInvalidSnapshotNamespace
    65  	}
    66  	switch pl := payload.Data.(type) {
    67  	case *types.PayloadEpoch:
    68  		snap := pl.EpochState
    69  		s.epoch = types.Epoch{
    70  			Seq:        snap.Seq,
    71  			StartTime:  snap.StartTime,
    72  			ExpireTime: snap.ExpireTime,
    73  			Action:     vega.EpochAction_EPOCH_ACTION_START,
    74  		}
    75  
    76  		s.readyToStartNewEpoch = snap.ReadyToStartNewEpoch
    77  		s.readyToEndEpoch = snap.ReadyToEndEpoch
    78  
    79  		// notify all the engines that store epoch data about the current restored epoch
    80  		s.notifyRestore(ctx, s.epoch)
    81  		return nil, s.serialise()
    82  	default:
    83  		return nil, types.ErrUnknownSnapshotType
    84  	}
    85  }
    86  
    87  func (s *Svc) notifyRestore(ctx context.Context, e types.Epoch) {
    88  	for _, f := range s.restoreListeners {
    89  		f(ctx, e)
    90  	}
    91  }