/
salt.go
74 lines (60 loc) · 1.27 KB
/
salt.go
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package mtproto
import (
"context"
"time"
"github.com/go-faster/errors"
"go.uber.org/zap"
"github.com/gotd/td/mt"
)
func (c *Conn) storeSalt(salt int64) {
c.sessionMux.Lock()
// Copy to log.
oldSalt := c.salt
c.salt = salt
c.sessionMux.Unlock()
if salt != oldSalt {
c.log.Info("Salt updated", zap.Int64("old", oldSalt), zap.Int64("new", salt))
}
}
func (c *Conn) updateSalt() {
salt, ok := c.salts.Get(c.clock.Now().Add(time.Minute * 5))
if !ok {
return
}
c.storeSalt(salt)
}
const defaultSaltsNum = 4
func (c *Conn) getSalts(ctx context.Context) error {
request := &mt.GetFutureSaltsRequest{
Num: defaultSaltsNum,
}
ctx, cancel := context.WithTimeout(ctx, c.getTimeout(request.TypeID()))
defer cancel()
if err := c.writeServiceMessage(ctx, request); err != nil {
return errors.Wrap(err, "request salts")
}
return nil
}
func (c *Conn) saltLoop(ctx context.Context) error {
select {
case <-c.gotSession.Ready():
case <-ctx.Done():
return ctx.Err()
}
// Get salts first time.
if err := c.getSalts(ctx); err != nil {
return err
}
ticker := c.clock.Ticker(c.saltFetchInterval)
defer ticker.Stop()
for {
select {
case <-ticker.C():
if err := c.getSalts(ctx); err != nil {
return err
}
case <-ctx.Done():
return ctx.Err()
}
}
}