copy changes from original PR

frame/support/src/traits/tokens/fungibles.rs

@@ -267,19 +267,16 @@ pub trait Create<AccountId>: Inspect<AccountId> {
 
 /// Trait for providing the ability to destroy existing fungible assets.
 pub trait Destroy<AccountId>: Inspect<AccountId> {
-	/// The witness data needed to destroy an asset.
-	type DestroyWitness;
-
-	/// Provide the appropriate witness data needed to destroy an asset.
-	fn get_destroy_witness(id: &Self::AssetId) -> Option<Self::DestroyWitness>;
-
-	/// Destroy an existing fungible asset.
-	/// * `id`: The `AssetId` to be destroyed.
-	/// * `witness`: Any witness data that needs to be provided to complete the operation
-	///   successfully.
+	/// Start the destruction an existing fungible asset.
+	/// * `id`: The `AssetId` to be destroyed. successfully.
 	/// * `maybe_check_owner`: An optional account id that can be used to authorize the destroy
-	///   command. If not provided, we will not do any authorization checks before destroying the
+	///   command. If not provided, no authorization checks will be performed before destroying
 	///   asset.
+	fn start_destroy(id: Self::AssetId, maybe_check_owner: Option<AccountId>) -> DispatchResult;
+
+	/// Destroy all accounts associated with a given asset.
+	/// `destroy_accounts` should only be called after `start_destroy` has been called, and the
+	/// asset is in a `Destroying` state
 	///
 	/// * `id`: The identifier of the asset to be destroyed. This must identify an existing asset.
 	/// * `max_items`: The maximum number of accounts to be destroyed for a given call of the
@@ -293,7 +290,6 @@ pub trait Destroy<AccountId>: Inspect<AccountId> {
 	/// times to fully destroy all approvals. It will destroy `max_items` approvals at a
 	/// time.
 	fn destroy_accounts(id: Self::AssetId, max_items: u32) -> Result<u32, DispatchError>;
-
 	/// Destroy all approvals associated with a given asset up to the `max_items`
 	/// `destroy_approvals` should only be called after `start_destroy` has been called, and the
 	/// asset is in a `Destroying` state