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Ankan
f820dc0a1f
closes https://github.com/paritytech/polkadot-sdk/issues/158. partially addresses https://github.com/paritytech/polkadot-sdk/issues/226. Instead of fragile calculation of current balance by looking at `free balance - ED`, Nomination Pool now freezes ED in the pool reward account to restrict an account from going below minimum balance. This also has a nice side effect that if ED changes, we know how much is the imbalance in ED frozen in the pool and the current required ED. A pool operator can diligently top up the pool with the deficit in ED or vice versa, withdraw the excess they transferred to the pool. ## Notable changes - New call `adjust_pool_deposit`: Allows to top up the deficit or withdraw the excess deposited funds to the pool. - Uses Fungible trait (instead of Currency trait). Since NP was not doing any locking/reserving previously, no migration is needed for this. - One time migration of freezing ED from each of the existing pools (not very PoV friendly but fine for relay chain).
22 lines
1.1 KiB
Plaintext
22 lines
1.1 KiB
Plaintext
# Schema: Parity PR Documentation Schema (prdoc)
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# See doc at https://github.com/paritytech/prdoc
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title: Fix for Reward Deficit in the pool
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doc:
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- audience: Core Dev
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description: Instead of fragile calculation of current balance by looking at free balance - ED, Nomination Pool now freezes ED in the pool reward account to restrict an account from going below minimum balance. This also has a nice side effect that if ED changes, we know how much is the imbalance in ED frozen in the pool and the current required ED. A pool operator can diligently top up the pool with the deficit in ED or vice versa, withdraw the excess they transferred to the pool.
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notes:
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- Introduces new call `adjust_pool_deposit` that allows to top up the deficit or withdraw the excess deposit for the pool.
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- Switch to using Fungible trait from Currency trait.
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migrations:
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db: []
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runtime:
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- { pallet: "pallet-nomination-pools", description: "One time migration of freezing ED from each of the existing pools."}
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crates:
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- name: pallet-nomination-pools
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host_functions: [] |