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Struct pallet_nomination_pools::migration::unversioned::DelegationStakeMigration

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pub struct DelegationStakeMigration<T, MaxPools>(/* private fields */);
Expand description

Migrate existing pools from adapter::StakeStrategyType::Transfer to adapter::StakeStrategyType::Delegate.

Note: This only migrates the pools, the members are not migrated. They can use the permission-less Pallet::migrate_delegation() to migrate their funds.

This migration does not break any existing pool storage item, does not need to happen in any sequence and hence can be applied unversioned on a production runtime.

Takes MaxPools as type parameter to limit the number of pools that should be migrated in a single block. It should be set such that migration weight does not exceed the block weight limit. If all pools can be safely migrated, it is good to keep this number a little higher than the actual number of pools to handle any extra pools created while the migration is proposed, and before it is executed.

If there are pools that fail to migrate or did not fit in the bounds, the remaining pools can be migrated via the permission-less extrinsic Call::migrate_pool_to_delegate_stake.

Trait Implementations§

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impl<T: Config, MaxPools: Get<u32>> OnRuntimeUpgrade for DelegationStakeMigration<T, MaxPools>

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fn on_runtime_upgrade() -> Weight

See [Hooks::on_runtime_upgrade].
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fn pre_upgrade() -> Result<Vec<u8>, TryRuntimeError>

See [Hooks::pre_upgrade].
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fn post_upgrade(data: Vec<u8>) -> Result<(), TryRuntimeError>

See [Hooks::post_upgrade].
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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§

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impl<T, MaxPools> Freeze for DelegationStakeMigration<T, MaxPools>

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impl<T, MaxPools> RefUnwindSafe for DelegationStakeMigration<T, MaxPools>
where T: RefUnwindSafe, MaxPools: RefUnwindSafe,

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impl<T, MaxPools> Send for DelegationStakeMigration<T, MaxPools>
where T: Send, MaxPools: Send,

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impl<T, MaxPools> Sync for DelegationStakeMigration<T, MaxPools>
where T: Sync, MaxPools: Sync,

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impl<T, MaxPools> Unpin for DelegationStakeMigration<T, MaxPools>
where T: Unpin, MaxPools: Unpin,

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impl<T, MaxPools> UnwindSafe for DelegationStakeMigration<T, MaxPools>
where T: UnwindSafe, MaxPools: UnwindSafe,

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