cic-chain-events/cmd/main.go

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package main
import (
"context"
"flag"
"os"
"os/signal"
"strings"
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"sync"
"syscall"
"time"
"github.com/grassrootseconomics/cic-chain-events/internal/api"
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"github.com/grassrootseconomics/cic-chain-events/internal/filter"
"github.com/grassrootseconomics/cic-chain-events/internal/pipeline"
"github.com/grassrootseconomics/cic-chain-events/internal/syncer"
"github.com/knadh/goyesql/v2"
"github.com/knadh/koanf"
"github.com/zerodha/logf"
)
var (
confFlag string
debugFlag bool
queriesFlag string
ko *koanf.Koanf
lo logf.Logger
q goyesql.Queries
)
func init() {
flag.StringVar(&confFlag, "config", "config.toml", "Config file location")
flag.BoolVar(&debugFlag, "log", true, "Enable debug logging")
flag.StringVar(&queriesFlag, "queries", "queries.sql", "Queries file location")
flag.Parse()
lo = initLogger(debugFlag)
ko = initConfig(confFlag)
q = initQueries(queriesFlag)
}
func main() {
syncerStats := &syncer.Stats{}
wg := &sync.WaitGroup{}
apiServer := initApiServer()
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ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
defer stop()
pgStore, err := initPgStore()
if err != nil {
lo.Fatal("error loading pg store", "error", err)
}
workerPool := initWorkerPool()
graphqlFetcher := initFetcher()
pipeline := pipeline.NewPipeline(pipeline.PipelineOpts{
BlockFetcher: graphqlFetcher,
Filters: []filter.Filter{
initAddressFilter(),
initTransferFilter(),
// initNoopFilter(),
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},
Logg: lo,
Store: pgStore,
})
headSyncer, err := syncer.NewHeadSyncer(syncer.HeadSyncerOpts{
Logg: lo,
Pipeline: pipeline,
Pool: workerPool,
Stats: syncerStats,
WsEndpoint: ko.MustString("chain.ws_endpoint"),
})
if err != nil {
lo.Fatal("error loading head syncer", "error", err)
}
janitor := syncer.NewJanitor(syncer.JanitorOpts{
BatchSize: uint64(ko.MustInt64("indexer.batch_size")),
HeadBlockLag: uint64(ko.MustInt64("indexer.head_block_lag")),
Logg: lo,
Pipeline: pipeline,
Pool: workerPool,
Stats: syncerStats,
Store: pgStore,
SweepInterval: time.Second * time.Duration(ko.MustInt64("indexer.sweep_interval")),
})
apiServer.GET("/stats", api.StatsHandler(syncerStats, workerPool, lo))
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wg.Add(1)
go func() {
defer wg.Done()
if err := headSyncer.Start(ctx); err != nil {
lo.Fatal("head syncer error", "error", err)
}
}()
wg.Add(1)
go func() {
defer wg.Done()
if err := janitor.Start(ctx); err != nil {
lo.Fatal("janitor error", "error", err)
}
}()
wg.Add(1)
go func() {
defer wg.Done()
lo.Info("starting API server")
if err := apiServer.Start(ko.MustString("api.address")); err != nil {
if strings.Contains(err.Error(), "Server closed") {
lo.Info("shutting down server")
} else {
lo.Fatal("could not start api server", "err", err)
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}
}
}()
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<-ctx.Done()
lo.Info("graceful shutdown triggered")
workerPool.Stop()
if err := apiServer.Shutdown(ctx); err != nil {
lo.Error("could not gracefully shutdown api server", "err", err)
}
wg.Wait()
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}