fix: nanosecond precision for playground canister acquisition timestamps

CHANGELOG.md

@@ -12,6 +12,11 @@ The `dfx cycles` command no longer needs nor accepts the `--cycles-ledger-canist
 
 Updated to candid 0.10, ic-cdk 0.12, and ic-cdk-timers 0.6
 
+### fix: store playground canister acquisition timestamps with nanosecond precision on all platforms
+
+They've always been stored with nanosecond precisions on Linux and Macos.
+Now they are stored with nanosecond precision on Windows too.
+
 # 0.15.3
 
 ### fix: allow `http://localhost:*` as `connect-src` in the asset canister's CSP

src/dfx-core/src/config/model/canister_id_store.rs

@@ -23,11 +23,14 @@ pub type CanisterIds = BTreeMap<CanisterName, NetworkNametoCanisterId>;
 
 pub type CanisterTimestamps = BTreeMap<CanisterName, NetworkNametoCanisterTimestamp>;
 
+// OffsetDateTime has nanosecond precision, while SystemTime is OS-dependent (100ns on Windows)
+pub type AcquisitionDateTime = OffsetDateTime;
+
 #[derive(Debug, Clone, Default)]
-pub struct NetworkNametoCanisterTimestamp(BTreeMap<NetworkName, SystemTime>);
+pub struct NetworkNametoCanisterTimestamp(BTreeMap<NetworkName, AcquisitionDateTime>);
 
 impl Deref for NetworkNametoCanisterTimestamp {
-    type Target = BTreeMap<NetworkName, SystemTime>;
+    type Target = BTreeMap<NetworkName, AcquisitionDateTime>;
 
     fn deref(&self) -> &Self::Target {
         &self.0
@@ -48,7 +51,7 @@ impl Serialize for NetworkNametoCanisterTimestamp {
         let out = self.0.iter().map(|(key, time)| {
             (
                 key,
-                OffsetDateTime::from(*time)
+                AcquisitionDateTime::from(*time)
                     .format(&Rfc3339)
                     .expect("Failed to serialise timestamp"),
             )
@@ -63,12 +66,12 @@ impl<'de> Deserialize<'de> for NetworkNametoCanisterTimestamp {
         D: serde::Deserializer<'de>,
     {
         let map: BTreeMap<NetworkName, String> = Deserialize::deserialize(deserializer)?;
-        let btree: BTreeMap<NetworkName, SystemTime> = map
+        let btree: BTreeMap<NetworkName, AcquisitionDateTime> = map
             .into_iter()
-            .map(|(key, timestamp)| (key, OffsetDateTime::parse(&timestamp, &Rfc3339)))
+            .map(|(key, timestamp)| (key, AcquisitionDateTime::parse(&timestamp, &Rfc3339)))
             .try_fold(BTreeMap::new(), |mut map, (key, result)| match result {
                 Ok(value) => {
-                    map.insert(key, SystemTime::from(value));
+                    map.insert(key, value);
                     Ok(map)
                 }
                 Err(err) => Err(err),
@@ -178,7 +181,7 @@ impl CanisterIdStore {
         Ok(store)
     }
 
-    pub fn get_timestamp(&self, canister_name: &str) -> Option<&SystemTime> {
+    pub fn get_timestamp(&self, canister_name: &str) -> Option<&AcquisitionDateTime> {
         self.acquisition_timestamps
             .get(canister_name)
             .and_then(|timestamp_map| timestamp_map.get(&self.network_descriptor.name))
@@ -277,7 +280,7 @@ impl CanisterIdStore {
         &mut self,
         canister_name: &str,
         canister_id: &str,
-        timestamp: Option<SystemTime>,
+        timestamp: Option<AcquisitionDateTime>,
     ) -> Result<(), CanisterIdStoreError> {
         let network_name = &self.network_descriptor.name;
         match self.ids.get_mut(canister_name) {

src/dfx/src/lib/operations/canister/motoko_playground.rs

@@ -1,17 +1,16 @@
+use crate::lib::{environment::Environment, error::DfxResult};
+use anyhow::{bail, Context};
+use candid::{encode_args, CandidType, Decode, Deserialize, Encode, Principal};
+use dfx_core::config::model::canister_id_store::AcquisitionDateTime;
 use dfx_core::config::model::network_descriptor::{
     NetworkTypeDescriptor, MAINNET_MOTOKO_PLAYGROUND_CANISTER_ID,
 };
-use num_traits::ToPrimitive;
-use std::time::{Duration, SystemTime, UNIX_EPOCH};
-
-use anyhow::{bail, Context};
-use candid::{encode_args, CandidType, Decode, Deserialize, Encode, Principal};
 use fn_error_context::context;
 use ic_utils::interfaces::management_canister::builders::InstallMode;
+use num_traits::ToPrimitive;
 use rand::Rng;
 use slog::{debug, info};
-
-use crate::lib::{environment::Environment, error::DfxResult};
+use std::time::SystemTime;
 
 /// Arguments for the `getCanisterId` call.
 #[derive(CandidType)]
@@ -28,19 +27,17 @@ pub struct CanisterInfo {
 }
 
 impl CanisterInfo {
-    #[context("Failed to construct playground canister info.")]
-    pub fn from(id: Principal, timestamp: &SystemTime) -> DfxResult<Self> {
-        let timestamp = candid::Int::from(timestamp.duration_since(UNIX_EPOCH)?.as_nanos());
-        Ok(Self { id, timestamp })
+    pub fn from(id: Principal, timestamp: &AcquisitionDateTime) -> Self {
+        let timestamp = candid::Int::from(timestamp.unix_timestamp_nanos());
+        Self { id, timestamp }
     }
 
-    #[context("Failed to turn CanisterInfo into SystemTime")]
-    pub fn get_timestamp(&self) -> DfxResult<SystemTime> {
-        UNIX_EPOCH
-            .checked_add(Duration::from_nanos(
-                self.timestamp.0.to_u64().context("u64 overflow")?,
-            ))
-            .context("Failed to make absolute time from offset")
+    #[context("Failed to get timestamp from CanisterInfo")]
+    pub fn get_timestamp(&self) -> DfxResult<AcquisitionDateTime> {
+        AcquisitionDateTime::from_unix_timestamp_nanos(
+            self.timestamp.0.to_i128().context("i128 overflow")?,
+        )
+        .context("Failed to make unix timestamp from nanos")
     }
 }
 
@@ -122,7 +119,7 @@ pub async fn reserve_canister_with_playground(
 pub async fn authorize_asset_uploader(
     env: &dyn Environment,
     canister_id: Principal,
-    canister_timestamp: &SystemTime,
+    canister_timestamp: &AcquisitionDateTime,
     principal_to_authorize: &Principal,
 ) -> DfxResult {
     let agent = env.get_agent();
@@ -135,7 +132,7 @@ pub async fn authorize_asset_uploader(
     } else {
         bail!("Trying to authorize asset uploader on non-playground network.")
     };
-    let canister_info = CanisterInfo::from(canister_id, canister_timestamp)?;
+    let canister_info = CanisterInfo::from(canister_id, canister_timestamp);
 
     let nested_arg = Encode!(&principal_to_authorize)?;
     let call_arg = Encode!(&canister_info, &"authorize", &nested_arg)?;
@@ -152,13 +149,13 @@ pub async fn authorize_asset_uploader(
 pub async fn playground_install_code(
     env: &dyn Environment,
     canister_id: Principal,
-    canister_timestamp: &SystemTime,
+    canister_timestamp: &AcquisitionDateTime,
     arg: &[u8],
     wasm_module: &[u8],
     mode: InstallMode,
     is_asset_canister: bool,
-) -> DfxResult<SystemTime> {
-    let canister_info = CanisterInfo::from(canister_id, canister_timestamp)?;
+) -> DfxResult<AcquisitionDateTime> {
+    let canister_info = CanisterInfo::from(canister_id, canister_timestamp);
     let agent = env.get_agent();
     let playground_canister = match env.get_network_descriptor().r#type {
         NetworkTypeDescriptor::Playground {