Add Client::get_slot_index (#1158)

* initial attempt

* oop

* reuse network info params

sdk/src/client/api/high_level.rs

@@ -115,15 +115,13 @@ impl Client {
         Ok(selected_inputs)
     }
 
-    /// Returns the local time checked with the tangle timestamp. If the difference is larger than 5
-    /// minutes an error is returned to prevent locking outputs by accident for a wrong time.
-    pub async fn get_time_checked(&self) -> Result<u32> {
-        let current_time = unix_timestamp_now().as_secs() as u32;
+    // Returns the slot index corresponding to the current timestamp.
+    pub async fn get_slot_index(&self) -> Result<SlotIndex> {
+        let current_time = unix_timestamp_now().as_secs();
 
         let network_info = self.get_network_info().await?;
 
         if let Some(tangle_time) = network_info.tangle_time {
-            let tangle_time = tangle_time as u32;
             // Check the local time is in the range of +-5 minutes of the node to prevent locking funds by accident
             if !(tangle_time - FIVE_MINUTES_IN_SECONDS..tangle_time + FIVE_MINUTES_IN_SECONDS).contains(&current_time) {
                 return Err(Error::TimeNotSynced {
@@ -133,11 +131,6 @@ impl Client {
             }
         }
 
-        Ok(current_time)
-    }
-
-    // TODO
-    pub async fn get_slot_index(&self) -> Result<SlotIndex> {
-        todo!()
+        Ok(network_info.protocol_parameters.slot_index(current_time))
     }
 }

sdk/src/client/constants.rs

@@ -17,7 +17,7 @@ pub(crate) const DEFAULT_USER_AGENT: &str = concat!(env!("CARGO_PKG_NAME"), "/",
 #[cfg(not(target_family = "wasm"))]
 pub(crate) const MAX_PARALLEL_API_REQUESTS: usize = 100;
 /// Max allowed difference between the local time and latest milestone time, 5 minutes in seconds
-pub(crate) const FIVE_MINUTES_IN_SECONDS: u32 = 300;
+pub(crate) const FIVE_MINUTES_IN_SECONDS: u64 = 300;
 /// Delay for caching a node info response in WASM runtime
 #[cfg(target_family = "wasm")]
 pub(crate) const CACHE_NETWORK_INFO_TIMEOUT_IN_SECONDS: u32 = 60;

sdk/src/client/error.rs

@@ -132,9 +132,9 @@ pub enum Error {
     #[error("local time {current_time} doesn't match the tangle time: {tangle_time}")]
     TimeNotSynced {
         /// The local time.
-        current_time: u32,
+        current_time: u64,
         /// The tangle time.
-        tangle_time: u32,
+        tangle_time: u64,
     },
     /// The semantic validation of a transaction failed.
     #[error("the semantic validation of a transaction failed with conflict reason: {} - {0:?}", *.0 as u8)]