redis

package main

import (
	"context"
	"fmt"
	"os"
	"os/signal"

	"github.com/go-faster/errors"
	redisclient "github.com/go-redis/redis/v8"

	tgauth "github.com/gotd/td/telegram/auth"

	"github.com/gotd/td/telegram"

	"github.com/gotd/contrib/auth"
	"github.com/gotd/contrib/auth/terminal"
	"github.com/gotd/contrib/redis"
)

func redisAuth(ctx context.Context) error {
	redisClient := redisclient.NewClient(&redisclient.Options{})
	cred := redis.NewCredentials(redisClient).
		WithPhoneKey("phone").
		WithPasswordKey("password")

	client, err := telegram.ClientFromEnvironment(telegram.Options{})
	if err != nil {
		return errors.Wrap(err, "create client")
	}

	return client.Run(ctx, func(ctx context.Context) error {
		return client.Auth().IfNecessary(
			ctx,
			tgauth.NewFlow(auth.Build(cred, terminal.OS()), tgauth.SendCodeOptions{}),
		)
	})
}

func main() {
	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
	defer cancel()

	if err := redisAuth(ctx); err != nil {
		_, _ = fmt.Fprintf(os.Stderr, "%+v\n", err)
		os.Exit(1)
	}
}

Output:

package main

import (
	"context"
	"fmt"
	"os"
	"os/signal"

	"github.com/go-faster/errors"
	redisclient "github.com/go-redis/redis/v8"

	"github.com/gotd/td/telegram"

	"github.com/gotd/contrib/redis"
)

func redisStorage(ctx context.Context) error {
	redisClient := redisclient.NewClient(&redisclient.Options{})
	storage := redis.NewSessionStorage(redisClient, "session")

	client, err := telegram.ClientFromEnvironment(telegram.Options{
		SessionStorage: storage,
	})
	if err != nil {
		return errors.Wrap(err, "create client")
	}

	return client.Run(ctx, func(ctx context.Context) error {
		// Force redis to flush DB.
		// It may be necessary to be sure that session will be saved to the disk.
		if err := redisClient.FlushDBAsync(ctx).Err(); err != nil {
			return errors.Wrap(err, "flush")
		}

		_, err := client.Auth().Bot(ctx, os.Getenv("BOT_TOKEN"))
		return err
	})
}

func main() {
	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
	defer cancel()

	if err := redisStorage(ctx); err != nil {
		_, _ = fmt.Fprintf(os.Stderr, "%+v\n", err)
		os.Exit(1)
	}
}

Output: