code.vegaprotocol.io/vega@v0.79.0/core/limits/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 limits
    17  
    18  import (
    19  	"context"
    20  
    21  	"code.vegaprotocol.io/vega/core/types"
    22  	"code.vegaprotocol.io/vega/libs/proto"
    23  )
    24  
    25  var (
    26  	allKey = (&types.PayloadLimitState{}).Key()
    27  
    28  	hashKeys = []string{
    29  		allKey,
    30  	}
    31  )
    32  
    33  type limitsSnapshotState struct {
    34  	serialised []byte
    35  }
    36  
    37  // serialiseLimits returns the engine's limit data as marshalled bytes.
    38  func (e *Engine) serialiseLimits() ([]byte, error) {
    39  	pl := types.Payload{
    40  		Data: &types.PayloadLimitState{
    41  			LimitState: &types.LimitState{
    42  				CanProposeMarket:          e.canProposeMarket,
    43  				CanProposeAsset:           e.canProposeAsset,
    44  				GenesisLoaded:             e.genesisLoaded,
    45  				ProposeMarketEnabled:      e.proposeMarketEnabled,
    46  				ProposeSpotMarketEnabled:  e.proposeSpotMarketEnabled,
    47  				ProposePerpsMarketEnabled: e.proposePerpsMarketEnabled,
    48  				ProposeAssetEnabled:       e.proposeAssetEnabled,
    49  				ProposeMarketEnabledFrom:  e.proposeMarketEnabledFrom,
    50  				ProposeAssetEnabledFrom:   e.proposeAssetEnabledFrom,
    51  				CanUseAMMEnabled:          e.useAMMEnabled,
    52  			},
    53  		},
    54  	}
    55  	return proto.Marshal(pl.IntoProto())
    56  }
    57  
    58  // get the serialised form of the given key.
    59  func (e *Engine) serialise(k string) ([]byte, error) {
    60  	if k != allKey {
    61  		return nil, types.ErrSnapshotKeyDoesNotExist
    62  	}
    63  
    64  	data, err := e.serialiseLimits()
    65  	if err != nil {
    66  		return nil, err
    67  	}
    68  
    69  	e.lss.serialised = data
    70  	return data, nil
    71  }
    72  
    73  func (e *Engine) Namespace() types.SnapshotNamespace {
    74  	return types.LimitSnapshot
    75  }
    76  
    77  func (e *Engine) Keys() []string {
    78  	return hashKeys
    79  }
    80  
    81  func (e *Engine) Stopped() bool {
    82  	return false
    83  }
    84  
    85  func (e *Engine) GetState(k string) ([]byte, []types.StateProvider, error) {
    86  	data, err := e.serialise(k)
    87  	return data, nil, err
    88  }
    89  
    90  func (e *Engine) LoadState(ctx context.Context, payload *types.Payload) ([]types.StateProvider, error) {
    91  	if e.Namespace() != payload.Data.Namespace() {
    92  		return nil, types.ErrInvalidSnapshotNamespace
    93  	}
    94  
    95  	switch pl := payload.Data.(type) {
    96  	case *types.PayloadLimitState:
    97  		return nil, e.restoreLimits(ctx, pl.LimitState, payload)
    98  	default:
    99  		return nil, types.ErrUnknownSnapshotType
   100  	}
   101  }
   102  
   103  func (e *Engine) restoreLimits(ctx context.Context, l *types.LimitState, p *types.Payload) error {
   104  	e.canProposeAsset = l.CanProposeAsset
   105  	e.canProposeMarket = l.CanProposeMarket
   106  	e.genesisLoaded = l.GenesisLoaded
   107  	e.proposeMarketEnabled = l.ProposeMarketEnabled
   108  	e.proposeAssetEnabled = l.ProposeAssetEnabled
   109  	e.proposeMarketEnabledFrom = l.ProposeMarketEnabledFrom
   110  	e.proposeAssetEnabledFrom = l.ProposeAssetEnabledFrom
   111  	e.proposeSpotMarketEnabled = l.ProposeSpotMarketEnabled
   112  	e.proposePerpsMarketEnabled = l.ProposePerpsMarketEnabled
   113  	e.useAMMEnabled = l.CanUseAMMEnabled
   114  
   115  	e.sendEvent(ctx)
   116  	var err error
   117  	e.lss.serialised, err = proto.Marshal(p.IntoProto())
   118  	return err
   119  }