add economic security time endpoint to node

substrate/client/serai/src/genesis_liquidity.rs

@@ -32,4 +32,10 @@ impl State<'_> {
   pub async fn genesis_completed(&self) -> Result<bool, RpcError> {
     self.call::<bool>("genesis-liquidity/completed", "").await
   }
+
+  /// Returns the time economic security is achieved first time for all networks.
+  /// Returns `0` if it hasn't happen yet.
+  pub async fn economic_security_time(&self) -> Result<u64, RpcError> {
+    self.call::<u64>("genesis-liquidity/economic-security", "").await
+  }
 }

substrate/genesis-liquidity/src/lib.rs

@@ -276,6 +276,12 @@ mod pallet {
     pub fn completed() -> bool {
       Oraclized::<T>::get().is_some()
     }
+
+    /// Returns the time economic security was achieved, represented in milliseconds since the epoch.
+    /// Returns `0` if it isn't achieved yet.
+    pub fn economic_security_time() -> u64 {
+      EconomicSecurityAchieved::<T>::get().unwrap_or(0)
+    }
   }
 
   #[pallet::call]

substrate/node/src/rpc/genesis_liquidity.rs

@@ -72,5 +72,19 @@ pub(crate) fn module(
     },
   )?;
 
+  module.register_method(
+    "genesis-liquidity/economic-security",
+    |params, client, _ext| -> Result<_, Error> {
+      let Some(block_hash) = block_hash(client, &params)? else {
+        Err(Error::InvalidStateReference)?
+      };
+
+      let Ok(time) = client.runtime_api().economic_security_time(block_hash) else {
+        Err(Error::Internal("couldn't fetch genesis period status"))?
+      };
+      Ok(time)
+    },
+  )?;
+
   Ok(module)
 }

substrate/runtime/src/common.rs

@@ -81,5 +81,9 @@ sp_api::decl_runtime_apis! {
 
     /// Next nonce to be used for this account.
     fn account_nonce(of: SeraiAddress) -> u32;
+
+    /// Returns the time economic security was achieved, represented in milliseconds since the epoch.
+    /// Returns `0` if it isn't achieved yet.
+    fn economic_security_time() -> u64;
   }
 }

substrate/runtime/src/std_runtime_api.rs

@@ -201,5 +201,9 @@ sp_api::impl_runtime_apis! {
     fn account_nonce(of: SeraiAddress) -> u32 {
       unimplemented!("runtime is only implemented when WASM")
     }
+
+    fn economic_security_time() -> u64 {
+      unimplemented!("runtime is only implemented when WASM")
+    }
   }
 }

substrate/runtime/src/wasm/mod.rs

@@ -535,6 +535,10 @@ sp_api::impl_runtime_apis! {
     fn account_nonce(of: SeraiAddress) -> u32 {
       Core::next_nonce(&of)
     }
+
+    fn economic_security_time() -> u64 {
+      GenesisLiquidity::economic_security_time()
+    }
   }
 }