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main.go
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main.go
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package main
import (
"context"
"flag"
"fmt"
"net/http"
"os"
"os/signal"
"sync"
"syscall"
"github.com/accept-nano/accept-nano/internal/hub"
"github.com/accept-nano/accept-nano/internal/nano"
"github.com/accept-nano/accept-nano/internal/price"
"github.com/accept-nano/accept-nano/internal/subscriber"
"github.com/cenkalti/log"
"github.com/ulule/limiter/v3"
"github.com/ulule/limiter/v3/drivers/store/memory"
"go.etcd.io/bbolt"
)
const paymentsBucket = "payments"
// These variables are set by goreleaser on build.
var (
version = "0.0.0"
commit = ""
date = ""
)
var (
generateSeed = flag.Bool("seed", false, "generate a seed and exit")
configPath = flag.String("config", "config.toml", "config file path")
versionFlag = flag.Bool("version", false, "display version and exit")
config Config
db *bbolt.DB
server http.Server
rateLimiter *limiter.Limiter
node *nano.Node
stopCheckPayments = make(chan struct{})
checkPaymentWG sync.WaitGroup
verifications hub.Hub
priceAPI *price.API
subs *subscriber.Subscriber
)
func versionString() string {
const shaLen = 7
if len(commit) > shaLen {
commit = commit[:shaLen]
}
return fmt.Sprintf("%s (%s) [%s]", version, commit, date)
}
func main() {
flag.Parse()
if *versionFlag {
fmt.Println(versionString())
return
}
if *generateSeed {
seed, err := NewSeed()
if err != nil {
log.Fatal(err)
}
fmt.Println(seed)
return
}
err := config.Read()
if err != nil {
log.Fatal(err)
}
if config.EnableDebugLog {
log.SetLevel(log.DEBUG)
}
if config.CoinmarketcapAPIKey == "" {
log.Warning("empty CoinmarketcapAPIKey in config, fiat conversions will not work")
}
rate, err := limiter.NewRateFromFormatted(config.RateLimit)
if err != nil {
log.Fatal(err)
}
rateLimiter = limiter.New(memory.NewStore(), rate, limiter.WithTrustForwardHeader(true))
node = nano.New(config.NodeURL, config.NodeTimeout, config.NodeSleepBetweenRequests, config.NodeAuthorizationHeader, config.NodeAPIKeyHeader)
defer node.Close()
notificationClient.Timeout = config.NotificationRequestTimeout
priceAPI = price.NewAPI(config.CoinmarketcapAPIKey, config.CoinmarketcapRequestTimeout, config.CoinmarketcapCacheDuration)
log.Debugln("opening db:", config.DatabasePath)
db, err = bbolt.Open(config.DatabasePath, 0600, nil)
if err != nil {
log.Fatal(err)
}
log.Debugln("db has been opened successfully")
err = db.Update(func(tx *bbolt.Tx) error {
_, txErr := tx.CreateBucketIfNotExists([]byte(paymentsBucket))
return txErr
})
if err != nil {
log.Fatal(err)
}
// Check existing payments.
payments, err := LoadActivePayments()
if err != nil {
log.Fatal(err)
}
for _, p := range payments {
p.StartChecking()
}
if !config.DisableWebsocket && config.NodeWebsocketURL != "" {
subs = subscriber.New(config.NodeWebsocketURL, config.NodeWebsocketHandshakeTimeout, config.NodeWebsocketWriteTimeout, config.NodeWebsocketAckTimeout, config.NodeWebsocketKeepAlivePeriod)
go subs.Run()
go runChecker()
}
go runServer()
stop := make(chan os.Signal, 1)
signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
<-stop
close(stopCheckPayments)
shutdownTimeout := config.ShutdownTimeout
log.Noticeln("shutting down with timeout:", shutdownTimeout)
ctx, cancel := context.WithTimeout(context.Background(), shutdownTimeout)
defer cancel()
err = server.Shutdown(ctx)
if err != nil {
log.Errorln("shutdown error:", err)
}
checkPaymentWG.Wait()
err = db.Close()
if err != nil {
log.Fatal(err)
}
}
func runChecker() {
for account := range subs.Confirmations {
p, err := LoadPayment(account)
if err == errPaymentNotFound {
continue
}
if err != nil {
log.Errorf("cannot load payment: %s", err.Error())
continue
}
log.Debugf("received confirmation from websocket, checking account: %s", account)
go p.checkOnce()
}
}