Time and metadata improvements

src/util/Cargo.toml

@@ -27,6 +27,7 @@ toml = "0.5"
 rmp-serde = "0.14.3"
 serde = { version = "1.0", default-features = false, features = ["derive", "rc"] }
 serde_json = "1.0"
+chrono = "0.4"
 
 futures = "0.3"
 futures-util = "0.3"

src/util/data.rs

@@ -2,7 +2,6 @@ use rand::Rng;
 use serde::de::{self, Visitor};
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
 use std::fmt;
-use std::time::{SystemTime, UNIX_EPOCH};
 
 #[derive(Default, PartialOrd, Ord, Clone, Hash, PartialEq, Copy)]
 pub struct FixedBytes32([u8; 32]);
@@ -119,13 +118,6 @@ pub fn gen_uuid() -> UUID {
 	rand::thread_rng().gen::<[u8; 32]>().into()
 }
 
-pub fn now_msec() -> u64 {
-	SystemTime::now()
-		.duration_since(UNIX_EPOCH)
-		.expect("Fix your clock :o")
-		.as_millis() as u64
-}
-
 // RMP serialization with names of fields and variants
 
 pub fn rmp_to_vec_all_named<T>(val: &T) -> Result<Vec<u8>, rmp_serde::encode::Error>

src/util/lib.rs

@@ -5,3 +5,4 @@ pub mod background;
 pub mod config;
 pub mod data;
 pub mod error;
+pub mod time;

src/util/time.rs

@@ -0,0 +1,16 @@
+use chrono::{SecondsFormat, TimeZone, Utc};
+use std::time::{SystemTime, UNIX_EPOCH};
+
+pub fn now_msec() -> u64 {
+	SystemTime::now()
+		.duration_since(UNIX_EPOCH)
+		.expect("Fix your clock :o")
+		.as_millis() as u64
+}
+
+pub fn msec_to_rfc3339(msecs: u64) -> String {
+	let secs = msecs as i64 / 1000;
+	let nanos = (msecs as i64 % 1000) as u32 * 1_000_000;
+	let timestamp = Utc.timestamp(secs, nanos);
+	timestamp.to_rfc3339_opts(SecondsFormat::Secs, true)
+}