Rust loop for sunrise

main.rs

    loop {
        // Prepare the tx before sending it the transaction
        let tx = Eip1559TransactionRequest::new()        
        .to("0xD1A0060ba708BC4BCD3DA6C37EFa8deDF015FB70".parse::<Address>()?)
        .data(Bytes::from(calldata.clone()))
        .gas(U256::from(6_000_000u64))            
        .max_fee_per_gas(U256::from(8_000_000_0u64)) // 0.8 Gwei
        .max_priority_fee_per_gas(U256::from(1_800_000_00u64)); // 0.18 Gwei
    
        // Get current time and calculate time until next hour            
        let now: DateTime<Utc> = Utc::now();
        let next_hour = now + chrono::Duration::hours(1);        
        let next_hour = next_hour.with_minute(0).unwrap().with_second(0).unwrap();
        let duration_until_next_hour = next_hour.signed_duration_since(now);
        
        println!("Waiting until next hour: {}", next_hour);
        sleep(Duration::from_secs(duration_until_next_hour.num_seconds() as u64)).await;            

        //this is to prevent more than 1 tx per hour.         
        match client.send_transaction(tx, None).await {
            Ok(tx_hash) => {
                println!("Successfully sent transaction. Hash: {:?}", tx_hash);        
            },
            Err(e) => {
                println!("Error sending transaction: {:?}", e);
            }
        }                       
        // Wait 1 minute before trying again
        println!("Waiting 1 minute before next call...");        
    }