package infra

import (
	"fmt"
	"time"
)

// S3PresignURL genera una URL presignada para download (GET) del objeto key,
// valida durante expiry.
//
// STUB: la implementacion real requiere github.com/aws/aws-sdk-go-v2 (s3.PresignClient).
func S3PresignURL(cfg S3Config, key string, expiry time.Duration) (string, error) {
	_ = cfg
	_ = key
	_ = expiry
	return "", fmt.Errorf("s3_presign_url: not implemented (requiere github.com/aws/aws-sdk-go-v2)")
}