redis

type Conn interface {
	Get(name string) (string, error)
	Set(name string, value string) (bool, error)
	SetNX(name string, value string, expiry time.Duration) (bool, error)
	Eval(script *Script, keysAndArgs ...interface{}) (interface{}, error)
	PTTL(name string) (time.Duration, error)
	Close() error
}

type Pool interface {
	GetContext(ctx context.Context) (Conn, error)
}

type Script struct {
	KeyCount int
	Src      string
	Hash     string
}