code.vegaprotocol.io/vega@v0.79.0/datanode/sqlsubscribers/trades.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 sqlsubscribers
    17  
    18  import (
    19  	"context"
    20  	"time"
    21  
    22  	"code.vegaprotocol.io/vega/core/events"
    23  	"code.vegaprotocol.io/vega/datanode/entities"
    24  	types "code.vegaprotocol.io/vega/protos/vega"
    25  
    26  	"github.com/pkg/errors"
    27  )
    28  
    29  type TradeEvent interface {
    30  	events.Event
    31  	Trade() types.Trade
    32  }
    33  
    34  type TradesStore interface {
    35  	Add(*entities.Trade) error
    36  	Flush(ctx context.Context) error
    37  }
    38  
    39  type TradeSubscriber struct {
    40  	subscriber
    41  	store TradesStore
    42  }
    43  
    44  func NewTradesSubscriber(store TradesStore) *TradeSubscriber {
    45  	return &TradeSubscriber{
    46  		store: store,
    47  	}
    48  }
    49  
    50  func (ts *TradeSubscriber) Types() []events.Type {
    51  	return []events.Type{events.TradeEvent}
    52  }
    53  
    54  func (ts *TradeSubscriber) Flush(ctx context.Context) error {
    55  	return ts.store.Flush(ctx)
    56  }
    57  
    58  func (ts *TradeSubscriber) Push(ctx context.Context, evt events.Event) error {
    59  	return ts.consume(evt.(TradeEvent))
    60  }
    61  
    62  func (ts *TradeSubscriber) consume(te TradeEvent) error {
    63  	trade := te.Trade()
    64  	return errors.Wrap(ts.addTrade(&trade, entities.TxHash(te.TxHash()), ts.vegaTime, te.Sequence()), "failed to consume trade")
    65  }
    66  
    67  func (ts *TradeSubscriber) addTrade(t *types.Trade, txHash entities.TxHash, vegaTime time.Time, blockSeqNumber uint64) error {
    68  	trade, err := entities.TradeFromProto(t, txHash, vegaTime, blockSeqNumber)
    69  	if err != nil {
    70  		return errors.Wrap(err, "converting event to trade")
    71  	}
    72  
    73  	return errors.Wrap(ts.store.Add(trade), "adding trade to store")
    74  }
    75  
    76  func (ts *TradeSubscriber) Name() string {
    77  	return "TradeSubscriber"
    78  }