Trait frame_support::traits::tokens::fungibles::Destroy

pub trait Destroy<AccountId>: Inspect<AccountId> {
    // Required methods
    fn start_destroy(
        id: Self::AssetId,
        maybe_check_owner: Option<AccountId>
    ) -> DispatchResult;
    fn destroy_accounts(
        id: Self::AssetId,
        max_items: u32
    ) -> Result<u32, DispatchError>;
    fn destroy_approvals(
        id: Self::AssetId,
        max_items: u32
    ) -> Result<u32, DispatchError>;
    fn finish_destroy(id: Self::AssetId) -> DispatchResult;
}

Trait for providing the ability to destroy existing fungible assets.

Required Methods

fn start_destroy( id: Self::AssetId, maybe_check_owner: Option<AccountId> ) -> DispatchResult

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, no authorization checks will be performed before destroying asset.

fn destroy_accounts( id: Self::AssetId, max_items: u32 ) -> Result<u32, DispatchError>

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 function. This value should be small enough to allow the operation fit into a logical block.

Response:

• u32: Total number of approvals which were actually destroyed

Due to weight restrictions, this function may need to be called multiple times to fully destroy all approvals. It will destroy max_items approvals at a time.

fn destroy_approvals( 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

• 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 function. This value should be small enough to allow the operation fit into a logical block.

Response:

• u32: Total number of approvals which were actually destroyed

Due to weight restrictions, this function may need to be called multiple times to fully destroy all approvals. It will destroy max_items approvals at a time.

fn finish_destroy(id: Self::AssetId) -> DispatchResult

Complete destroying asset and unreserve currency. finish_destroy should only be called after start_destroy has been called, and the asset is in a Destroying state. All accounts or approvals should be destroyed before hand.

• id: The identifier of the asset to be destroyed. This must identify an existing asset.

Implementors