Struct for Nostr in Rust

struct_nostr.rs

#![allow(unused)]
use chrono::Utc;
use dotenv::dotenv;
use regex::Regex;
use serde::{Deserialize, Serialize};
use std::fmt;
use std::collections::HashSet;
use std::env;
use std::fs::File;
use std::io::Write;
use std::time::Duration;
use nostr_sdk::prelude::*;
use tokio::time;

type Tags = Vec<Vec<String>>;


#[derive(Debug, Hash, Eq, PartialEq, Serialize, Deserialize)]
struct NosContent {
    content: String,
    pubkey: XOnlyPublicKey,
    created_at: i32,
    sig: String,
    #[serde(rename = "tags")]
    tags: Tags,
    id: EventId
}