134 lines
2.7 KiB
Go
134 lines
2.7 KiB
Go
package sub
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"errors"
|
|
"log/slog"
|
|
"time"
|
|
|
|
"github.com/grassrootseconomics/celo-indexer/internal/store"
|
|
"github.com/grassrootseconomics/celo-tracker/pkg/event"
|
|
"github.com/nats-io/nats.go"
|
|
"github.com/nats-io/nats.go/jetstream"
|
|
)
|
|
|
|
type (
|
|
JetStreamOpts struct {
|
|
Store store.Store
|
|
Logg *slog.Logger
|
|
Endpoint string
|
|
JetStreamID string
|
|
}
|
|
|
|
JetStreamSub struct {
|
|
jsConsumer jetstream.Consumer
|
|
store store.Store
|
|
natsConn *nats.Conn
|
|
logg *slog.Logger
|
|
durableID string
|
|
}
|
|
)
|
|
|
|
const (
|
|
pullStream = "TRACKER"
|
|
pullSubject = "TRACKER.*"
|
|
)
|
|
|
|
func NewJetStreamSub(o JetStreamOpts) (Sub, error) {
|
|
natsConn, err := nats.Connect(o.Endpoint)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
js, err := jetstream.New(natsConn)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
|
|
defer cancel()
|
|
|
|
stream, err := js.Stream(ctx, pullStream)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
consumer, err := stream.CreateOrUpdateConsumer(ctx, jetstream.ConsumerConfig{
|
|
Durable: o.JetStreamID,
|
|
AckPolicy: jetstream.AckExplicitPolicy,
|
|
FilterSubject: pullStream,
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
o.Logg.Info("successfully connected to NATS server")
|
|
|
|
return &JetStreamSub{
|
|
jsConsumer: consumer,
|
|
store: o.Store,
|
|
natsConn: natsConn,
|
|
logg: o.Logg,
|
|
durableID: o.JetStreamID,
|
|
}, nil
|
|
}
|
|
|
|
func (s *JetStreamSub) Close() {
|
|
if s.natsConn != nil {
|
|
s.natsConn.Close()
|
|
}
|
|
}
|
|
|
|
func (s *JetStreamSub) Process() error {
|
|
for {
|
|
events, err := s.jsConsumer.Fetch(100, jetstream.FetchMaxWait(1*time.Second))
|
|
if err != nil {
|
|
if errors.Is(err, nats.ErrTimeout) {
|
|
continue
|
|
} else if errors.Is(err, nats.ErrConnectionClosed) {
|
|
return nil
|
|
} else {
|
|
return err
|
|
}
|
|
}
|
|
|
|
for msg := range events.Messages() {
|
|
if err := s.processEventHandler(context.Background(), msg.Subject(), msg.Data()); err != nil {
|
|
s.logg.Error("error processing nats message", "error", err)
|
|
msg.Nak()
|
|
} else {
|
|
msg.Ack()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (s *JetStreamSub) processEventHandler(ctx context.Context, msgSubject string, msgData []byte) error {
|
|
var chainEvent event.Event
|
|
|
|
if err := json.Unmarshal(msgData, &chainEvent); err != nil {
|
|
return err
|
|
}
|
|
|
|
switch msgSubject {
|
|
case "TRACKER.TOKEN_TRANSFER":
|
|
if err := s.store.InsertTokenTransfer(ctx, chainEvent); err != nil {
|
|
return err
|
|
}
|
|
case "TRACKER.TOKEN_MINT":
|
|
if err := s.store.InsertTokenMint(ctx, chainEvent); err != nil {
|
|
return err
|
|
}
|
|
case "TRACKER.POOL_SWAP":
|
|
if err := s.store.InsertPoolSwap(ctx, chainEvent); err != nil {
|
|
return err
|
|
}
|
|
case "TRACKER.POOL_DEPOSIT":
|
|
if err := s.store.InsertPoolDeposit(ctx, chainEvent); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|