Use seconds for signature timestamp (#228)

Author: casey

src/functions.rs

@@ -18,12 +18,12 @@ pub(crate) fn is_lowercase_hex(s: &str) -> bool {
     .all(|c| c.is_ascii_hexdigit() && (c.is_numeric() || c.is_lowercase()))
 }
 
-pub(crate) fn now() -> Result<u128> {
+pub(crate) fn now() -> Result<u64> {
   Ok(
     SystemTime::now()
       .duration_since(UNIX_EPOCH)
       .context(error::Time)?
-      .as_nanos(),
+      .as_secs(),
   )
 }
 

src/message.rs

@@ -3,7 +3,7 @@ use super::*;
 #[derive(Clone, Debug, Eq, Ord, PartialEq, PartialOrd)]
 pub struct Message {
   pub fingerprint: Fingerprint,
-  pub time: Option<u128>,
+  pub time: Option<u64>,
 }
 
 impl Message {

src/signature.rs

@@ -79,7 +79,7 @@ impl FromStr for Signature {
 
     let time = match decoder.fe() {
       None => None,
-      Some(TIME) => Some(u128::from_le_bytes(decoder.byte_array()?)),
+      Some(TIME) => Some(u64::from_le_bytes(decoder.byte_array()?)),
       Some(tag) => return Err(signature_error::Field { tag }.build()),
     };
 

tests/create.rs

@@ -312,8 +312,8 @@ fn sign_with_time() {
   let now = SystemTime::now()
     .duration_since(UNIX_EPOCH)
     .unwrap()
-    .as_nanos();
-  let one_minute_ago = now - 60 * 1_000_000_000;
+    .as_secs();
+  let one_minute_ago = now - 60;
   assert!(time >= one_minute_ago && time <= now);
 }
 

tests/sign.rs

@@ -187,7 +187,7 @@ fn with_time() {
   let now = SystemTime::now()
     .duration_since(UNIX_EPOCH)
     .unwrap()
-    .as_nanos();
-  let one_minute_ago = now - 60 * 1_000_000_000;
+    .as_secs();
+  let one_minute_ago = now - 60;
   assert!(time >= one_minute_ago && time <= now);
 }