refactor: Use SystemTime for timestamps

client/tests/integration/triggers/time_trigger.rs

@@ -1,4 +1,4 @@
-use std::time::Duration;
+use std::time::{Duration, SystemTime};
 
 use eyre::Result;
 use iroha::{
@@ -31,14 +31,6 @@ pub fn default_consensus_estimation() -> Duration {
         .map_or_else(|| unreachable!(), |x| x)
 }
 
-fn curr_time() -> core::time::Duration {
-    use std::time::SystemTime;
-
-    SystemTime::now()
-        .duration_since(SystemTime::UNIX_EPOCH)
-        .unwrap()
-}
-
 /// Macro to abort compilation, if `e` isn't `true`
 macro_rules! const_assert {
     ($e:expr) => {
@@ -61,7 +53,7 @@ fn time_trigger_execution_count_error_should_be_less_than_15_percent() -> Result
 
     let (_rt, _peer, mut test_client) = <PeerBuilder>::new().with_port(10_775).start_with_runtime();
     wait_for_genesis_committed(&vec![test_client.clone()], 0);
-    let start_time = curr_time();
+    let start_time = SystemTime::now();
 
     // Start listening BEFORE submitting any transaction not to miss any block committed event
     let event_listener = get_block_committed_event_listener(&test_client)?;
@@ -94,8 +86,12 @@ fn time_trigger_execution_count_error_should_be_less_than_15_percent() -> Result
     )?;
     std::thread::sleep(default_consensus_estimation());
 
-    let finish_time = curr_time();
-    let average_count = finish_time.saturating_sub(start_time).as_millis() / PERIOD.as_millis();
+    let finish_time = SystemTime::now();
+    let average_count = finish_time
+        .duration_since(start_time)
+        .unwrap_or_else(|_| Duration::from_secs(0))
+        .as_millis()
+        / PERIOD.as_millis();
 
     let actual_value = get_asset_value(&mut test_client, asset_id);
     let expected_value = prev_value
@@ -131,7 +127,7 @@ fn mint_asset_after_3_sec() -> Result<()> {
         id: asset_id.clone(),
     })?;
 
-    let start_time = curr_time();
+    let start_time = SystemTime::now();
     // Create trigger with schedule which is in the future to the new block but within block estimation time
     let schedule = TimeSchedule::starting_at(start_time + Duration::from_secs(3));
     let instruction = Mint::asset_numeric(1_u32, asset_id.clone());
@@ -257,7 +253,7 @@ fn mint_nft_for_every_user_every_1_sec() -> Result<()> {
     // Registering trigger
     // Offset into the future to be able to register trigger
     let offset = Duration::from_secs(10);
-    let start_time = curr_time() + offset;
+    let start_time = SystemTime::now() + offset;
     let schedule = TimeSchedule::starting_at(start_time).with_period(TRIGGER_PERIOD);
 
     let filter = TimeEventFilter(ExecutionTime::Schedule(schedule));

client/tests/integration/tx_history.rs

@@ -1,4 +1,4 @@
-use std::{str::FromStr as _, thread};
+use std::{str::FromStr as _, thread, time::SystemTime};
 
 use eyre::Result;
 use iroha::{
@@ -60,7 +60,7 @@ fn client_has_rejected_and_acepted_txs_should_return_tx_history() -> Result<()>
         .execute_all()?;
     assert_eq!(transactions.len(), 50);
 
-    let mut prev_creation_time = core::time::Duration::from_millis(0);
+    let mut prev_creation_time = SystemTime::UNIX_EPOCH;
     transactions
         .iter()
         .map(AsRef::as_ref)

core/src/block.rs

@@ -159,18 +159,17 @@ mod pending {
             transactions: &[CommittedTransaction],
             consensus_estimation: Duration,
         ) -> BlockHeader {
-            let prev_block_time =
-                prev_block.map_or(Duration::ZERO, |block| block.header().creation_time());
+            let prev_block_time = prev_block.map_or(SystemTime::UNIX_EPOCH, |block| {
+                block.header().creation_time()
+            });
 
             let latest_txn_time = transactions
                 .iter()
                 .map(|tx| tx.as_ref().creation_time())
                 .max()
                 .expect("INTERNAL BUG: Block empty");
 
-            let now = SystemTime::now()
-                .duration_since(SystemTime::UNIX_EPOCH)
-                .unwrap();
+            let now = SystemTime::now();
 
             // NOTE: Lower time bound must always be upheld for a valid block
             // If the clock has drifted too far this block will be rejected
@@ -200,6 +199,8 @@ mod pending {
                     .hash()
                     .expect("INTERNAL BUG: Empty block created"),
                 creation_time_ms: creation_time
+                    .duration_since(SystemTime::UNIX_EPOCH)
+                    .expect("INTERNAL BUG: Failed to get the current system time")
                     .as_millis()
                     .try_into()
                     .expect("Time should fit into u64"),
@@ -526,11 +527,9 @@ mod valid {
                 });
             }
 
-            let now = SystemTime::now()
-                .duration_since(SystemTime::UNIX_EPOCH)
-                .unwrap();
+            let now = SystemTime::now();
             let max_clock_drift = state.world().parameters().sumeragi.max_clock_drift();
-            if block.header().creation_time().saturating_sub(now) > max_clock_drift {
+            if block.header().creation_time() > now + max_clock_drift {
                 return Err(BlockValidationError::BlockInTheFuture);
             }
 

core/src/metrics.rs

@@ -114,13 +114,13 @@ impl MetricsReporter {
 
         #[allow(clippy::cast_possible_truncation)]
         if let Some(timestamp) = state_view.genesis_timestamp() {
-            let curr_time = SystemTime::now()
-                .duration_since(SystemTime::UNIX_EPOCH)
-                .unwrap();
+            let curr_time = SystemTime::now();
 
             // this will overflow in 584942417years.
             self.metrics.uptime_since_genesis_ms.set(
-                (curr_time - timestamp)
+                curr_time
+                    .duration_since(timestamp)
+                    .expect("Failed to get the current system time")
                     .as_millis()
                     .try_into()
                     .expect("Timestamp should fit into u64"),

core/src/queue.rs

@@ -1,6 +1,6 @@
 //! Module with queue actor
 use core::time::Duration;
-use std::{num::NonZeroUsize, ops::Deref, sync::Arc};
+use std::{num::NonZeroUsize, ops::Deref, sync::Arc, time::SystemTime};
 
 use crossbeam_queue::ArrayQueue;
 use dashmap::{mapref::entry::Entry, DashMap};
@@ -133,8 +133,8 @@ impl Queue {
             |tx_time_to_live| core::cmp::min(self.tx_time_to_live, tx_time_to_live),
         );
 
-        let curr_time = self.time_source.get_unix_time();
-        curr_time.saturating_sub(tx_creation_time) > time_limit
+        let curr_time = SystemTime::UNIX_EPOCH + self.time_source.get_unix_time();
+        curr_time > tx_creation_time + time_limit
     }
 
     /// Returns all pending transactions.

core/src/state.rs

@@ -1,6 +1,6 @@
 //! This module provides the [`State`] — an in-memory representation of the current blockchain state.
 use std::{
-    collections::BTreeSet, marker::PhantomData, num::NonZeroUsize, sync::Arc, time::Duration,
+    collections::BTreeSet, marker::PhantomData, num::NonZeroUsize, sync::Arc, time::SystemTime,
 };
 
 use eyre::Result;
@@ -1285,7 +1285,7 @@ pub trait StateReadOnly {
     /// Returns [`Some`] milliseconds since the genesis block was
     /// committed, or [`None`] if it wasn't.
     #[inline]
-    fn genesis_timestamp(&self) -> Option<Duration> {
+    fn genesis_timestamp(&self) -> Option<SystemTime> {
         if self.block_hashes().is_empty() {
             None
         } else {

core/src/tx.rs

@@ -79,10 +79,8 @@ impl AcceptedTransaction {
             }));
         }
 
-        let now = SystemTime::now()
-            .duration_since(SystemTime::UNIX_EPOCH)
-            .unwrap();
-        if tx.creation_time().saturating_sub(now) > max_clock_drift {
+        let now = SystemTime::now();
+        if tx.creation_time() > now + max_clock_drift {
             return Err(AcceptTransactionFail::TransactionInTheFuture);
         }
 

data_model/benches/time_event_filter.rs

@@ -1,6 +1,6 @@
 #![allow(missing_docs)]
 
-use std::time::Duration;
+use std::time::{Duration, SystemTime};
 
 use criterion::{criterion_group, criterion_main, Criterion};
 use iroha_data_model::prelude::*;
@@ -12,14 +12,15 @@ fn schedule_from_zero_with_little_period(criterion: &mut Criterion) {
 
     const TIMESTAMP: u64 = 1_647_443_386;
 
-    let since = Duration::from_secs(TIMESTAMP);
+    let since = SystemTime::UNIX_EPOCH + Duration::from_secs(TIMESTAMP);
     let length = Duration::from_secs(1);
     let interval = TimeInterval::new(since, length);
     let event = TimeEvent {
         prev_interval: None,
         interval,
     };
-    let schedule = TimeSchedule::starting_at(Duration::ZERO).with_period(Duration::from_millis(1));
+    let schedule =
+        TimeSchedule::starting_at(SystemTime::UNIX_EPOCH).with_period(Duration::from_millis(1));
     let filter = TimeEventFilter::new(ExecutionTime::Schedule(schedule));
 
     criterion.bench_function("count_matches_from_zero", |b| {

data_model/src/block.rs

@@ -7,6 +7,8 @@
 #[cfg(not(feature = "std"))]
 use alloc::{boxed::Box, format, string::String, vec::Vec};
 use core::{fmt::Display, time::Duration};
+#[cfg(feature = "std")]
+use std::time::SystemTime;
 
 use derive_more::Display;
 use iroha_crypto::{HashOf, MerkleTree, SignatureOf};
@@ -133,8 +135,9 @@ impl BlockHeader {
     }
 
     /// Creation timestamp
-    pub const fn creation_time(&self) -> Duration {
-        Duration::from_millis(self.creation_time_ms)
+    #[cfg(feature = "std")]
+    pub fn creation_time(&self) -> SystemTime {
+        SystemTime::UNIX_EPOCH + Duration::from_millis(self.creation_time_ms)
     }
 
     /// Consensus estimation