Struct pallet_tips::migrations::unreserve_deposits::UnreserveDeposits

pub struct UnreserveDeposits<T: UnlockConfig<I>, I: 'static>(_);

Expand description

A migration that unreserves all tip deposits.

Useful to prevent funds from being locked up when the pallet is deprecated.

The pallet should be made inoperable before or immediately after this migration is run.

(See also the RemovePallet migration in frame/support/src/migrations.rs)

Trait Implementations§

impl<T: UnlockConfig<I>, I: 'static> OnRuntimeUpgrade for UnreserveDeposits<T, I>where <<T as UnlockConfig<I>>::Currency as Currency<<T as UnlockConfig<I>>::AccountId>>::Balance: Sum,

fn pre_upgrade() -> Result<Vec<u8>, TryRuntimeError>

Gets the actual reserved amount for each account before the migration, performs integrity checks and prints some summary information.

Steps:

Gets the deposited balances for each account stored in this pallet.
Collects actual pre-migration reserved balances for each account.
Checks the integrity of the deposited balances.
Prints summary statistics about the state to be migrated.
Returns the pre-migration actual reserved balance for each account that will be part of the migration.

Fails with a TryRuntimeError if somehow the amount reserved by this pallet is greater than the actual total reserved amount for any accounts.

fn on_runtime_upgrade() -> Weight

Executes the migration, unreserving funds that are locked in Tip deposits.

fn post_upgrade( account_reserved_before_bytes: Vec<u8> ) -> Result<(), TryRuntimeError>

Verifies that the account reserved balances were reduced by the actual expected amounts.

fn try_on_runtime_upgrade(checks: bool) -> Result<Weight, DispatchError>

The expected and default behavior of this method is to handle executing pre_upgrade -> on_runtime_upgrade -> post_upgrade hooks for a migration. Read more

Auto Trait Implementations§

impl<T, I> RefUnwindSafe for UnreserveDeposits<T, I>where I: RefUnwindSafe, T: RefUnwindSafe,

impl<T, I> Send for UnreserveDeposits<T, I>where I: Send, T: Send,

impl<T, I> Sync for UnreserveDeposits<T, I>where I: Sync, T: Sync,

impl<T, I> Unpin for UnreserveDeposits<T, I>where I: Unpin, T: Unpin,

impl<T, I> UnwindSafe for UnreserveDeposits<T, I>where I: UnwindSafe, T: UnwindSafe,

Blanket Implementations§

impl<T> Any for Twhere T: 'static + ?Sized,

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