Source File
	ack.go

Belonging Package
	github.com/gotd/td/internal/mtproto

package mtproto

import (
	"context"

	"github.com/go-faster/errors"
	"go.uber.org/zap"

	"github.com/gotd/td/internal/mt"
)

func (c *Conn) ackLoop(ctx context.Context) error {
	log := c.log.Named("ack")

	var buf []int64
	send := func() {
		defer func() { buf = buf[:0] }()

		if err := c.writeServiceMessage(ctx, &mt.MsgsAck{MsgIDs: buf}); err != nil {
			c.log.Error("Failed to ACK", zap.Error(err))
			return
		}

		log.Debug("Ack", zap.Int64s("msg_ids", buf))
	}

	ticker := c.clock.Ticker(c.ackInterval)
	defer ticker.Stop()

	for {
		select {
		case <-ctx.Done():
			return errors.Wrap(ctx.Err(), "acl")
		case <-ticker.C():
			if len(buf) > 0 {
				send()
			}
		case msgID := <-c.ackSendChan:
			buf = append(buf, msgID)
			if len(buf) >= c.ackBatchSize {
				send()
				ticker.Reset(c.ackInterval)
			}
		}
	}
}

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