/
receiver.go
233 lines (202 loc) · 5.08 KB
/
receiver.go
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package receiver
import (
"context"
"fmt"
"sync"
"time"
"github.com/dipdup-net/go-lib/database"
"github.com/dipdup-net/go-lib/node"
"github.com/dipdup-net/go-lib/prometheus"
"github.com/dipdup-net/mempool/cmd/mempool/models"
pg "github.com/go-pg/pg/v10"
"github.com/pkg/errors"
"github.com/rs/zerolog/log"
)
// Receiver -
type Receiver struct {
urls []string
monitors []*node.Monitor
db *database.PgGo
prom *prometheus.Service
state *database.State
indexName string
protocol string
network string
blockTime int64
wg sync.WaitGroup
operations chan Message
}
// New -
func New(urls []string, network string, opts ...ReceiverOption) (*Receiver, error) {
if len(urls) == 0 {
return nil, errors.Errorf("Empty url list: %s", network)
}
monitors := make([]*node.Monitor, len(urls))
for i := range urls {
monitors[i] = node.NewMonitor(urls[i])
}
indexer := Receiver{
urls: urls,
operations: make(chan Message, 1024),
indexName: models.MempoolIndexName(network),
network: network,
monitors: monitors,
}
for i := range opts {
opts[i](&indexer)
}
if indexer.blockTime == 0 {
indexer.blockTime = 30
}
return &indexer, nil
}
// Start -
func (indexer *Receiver) Start(ctx context.Context) {
if indexer.db != nil && len(indexer.urls) > 0 {
indexer.wg.Add(1)
go indexer.updateState(ctx, indexer.urls[0])
}
for i := range indexer.monitors {
indexer.wg.Add(1)
go indexer.run(ctx, indexer.monitors[i])
indexer.monitors[i].SubscribeOnMempoolApplied(ctx)
indexer.monitors[i].SubscribeOnMempoolBranchDelayed(ctx)
indexer.monitors[i].SubscribeOnMempoolBranchRefused(ctx)
indexer.monitors[i].SubscribeOnMempoolRefused(ctx)
indexer.monitors[i].SubscribeOnMempoolOutdated(ctx)
}
}
// Close -
func (indexer *Receiver) Close() error {
indexer.wg.Wait()
return nil
}
// Operations -
func (indexer *Receiver) Operations() <-chan Message {
return indexer.operations
}
func (indexer *Receiver) run(ctx context.Context, monitor *node.Monitor) {
defer indexer.wg.Done()
for {
select {
case <-ctx.Done():
for i := range indexer.monitors {
if err := indexer.monitors[i].Close(); err != nil {
log.Err(err).Msg("")
}
}
close(indexer.operations)
return
case applied := <-monitor.Applied():
for i := range applied {
indexer.operations <- Message{
Status: StatusApplied,
Body: *applied[i],
Protocol: indexer.protocol,
}
}
case branchDelayed := <-monitor.BranchDelayed():
for i := range branchDelayed {
indexer.operations <- Message{
Status: StatusBranchDelayed,
Body: *branchDelayed[i],
Protocol: indexer.protocol,
}
}
case branchRefused := <-monitor.BranchRefused():
for i := range branchRefused {
indexer.operations <- Message{
Status: StatusBranchRefused,
Body: *branchRefused[i],
Protocol: indexer.protocol,
}
}
case refused := <-monitor.Refused():
for i := range refused {
indexer.operations <- Message{
Status: StatusRefused,
Body: *refused[i],
Protocol: indexer.protocol,
}
}
case outdated := <-monitor.Outdated():
for i := range outdated {
indexer.operations <- Message{
Status: StatusOutdated,
Body: *outdated[i],
Protocol: indexer.protocol,
}
}
}
}
}
func (indexer *Receiver) checkHead(ctx context.Context, rpc node.API) error {
if indexer.db == nil {
return nil
}
head, err := rpc.Header(ctx, "head")
if err != nil {
indexer.incrementMetric(rpc.URL(), indexer.network, err)
return err
}
// If node is behind indexer more than one block throw error
if head.Level < indexer.state.Level-1 && indexer.state.Level > 0 {
return errors.Errorf("Node is stucked url=%s node_level=%d indexer_level=%d", rpc.URL(), head.Level, indexer.state.Level)
}
indexer.protocol = head.Protocol
return nil
}
func (indexer *Receiver) updateState(ctx context.Context, url string) {
defer indexer.wg.Done()
ticker := time.NewTicker(time.Second * time.Duration(indexer.blockTime))
defer ticker.Stop()
// init
if err := indexer.setState(); err != nil {
log.Err(err).Msg("")
}
rpc := node.NewMainRPC(url)
if err := indexer.checkHead(ctx, rpc); err != nil {
log.Err(err).Msg("")
}
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
if err := indexer.checkHead(ctx, rpc); err != nil {
log.Err(err).Msg("")
continue
}
if err := indexer.setState(); err != nil {
log.Err(err).Msg("")
continue
}
}
}
}
func (indexer *Receiver) setState() error {
state, err := indexer.db.State(indexer.indexName)
if err != nil {
if errors.Is(err, pg.ErrNoRows) {
indexer.state = &database.State{}
return nil
}
return err
}
indexer.state = state
return nil
}
func (indexer *Receiver) incrementMetric(url, network string, err error) {
if err == nil || indexer.prom == nil {
return
}
reqErr, ok := err.(node.RequestError)
if !ok {
return
}
indexer.prom.IncrementCounter("mempool_rpc_errors_count", map[string]string{
"network": network,
"node": url,
"code": fmt.Sprintf("%d", reqErr.Code),
})
}