fixed comment

Signed-off-by: Dzmitry Lahoda <dzmitry@lahoda.pro>

frame/composable-traits/src/currency.rs

@@ -30,15 +30,19 @@ pub trait CurrencyFactory<CurrencyId> {
 	fn create() -> Result<CurrencyId, DispatchError>;
 }
 
+/// Local presentation of asset information.
+/// Most pallets do not need it.
 pub trait LocalAssets<MayBeAssetId> {
-	/// decimals of of big unit over minimal unit
-	/// ORML also has separate trait on Balances to inspect decimals, that is not on type it self
-	fn decimals(currency_id: MayBeAssetId) -> Result<Exponent, DispatchError>;
-
-	fn unit<T: From<u64>>(currency_id: MayBeAssetId) -> Result<T, DispatchError> {
-		let exponent = Self::decimals(currency_id)?;
-		Ok(10_u64.pow(exponent).into())
-	}
+    /// decimals of of big unit over minimal unit
+    ///	ORML also has separate trait on Balances to inspect decimals, that is not on type it self
+    fn decimals(currency_id: MayBeAssetId) -> Result<Exponent, DispatchError>;
+    /// Amount which humans operate as `1` usually.
+    /// Amount is probably priceable by Oracles.
+    /// Amount resonably higher than minimal tradeable amount or minial trading step on DEX.
+    fn unit<T: From<u64>>(currency_id: MayBeAssetId) -> Result<T, DispatchError> {
+    	let exponent = Self::decimals(currency_id)?;
+    	Ok(10_u64.pow(exponent).into())
+    }
 }
 
 /// when we store assets in native form to chain in smallest units or for mock in tests