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Refund referendum submission deposit (#12788)
* optinal submission deposit and migration * refund submission deposit call, test, bench * try runtime fixes * assert for bench * Only refund cancelled/approved referenda deposits * update storage version Co-authored-by: Gav <gavin@parity.io>
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| Original file line number | Diff line number | Diff line change |
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| // This file is part of Substrate. | ||
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| // Copyright (C) 2017-2022 Parity Technologies (UK) Ltd. | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
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| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| //! Storage migrations for the referenda pallet. | ||
| use super::*; | ||
| use codec::{Decode, Encode, EncodeLike, MaxEncodedLen}; | ||
| use frame_support::{pallet_prelude::*, storage_alias, traits::OnRuntimeUpgrade}; | ||
| use log; | ||
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| /// Initial version of storage types. | ||
| pub mod v0 { | ||
| use super::*; | ||
| // ReferendumStatus and its dependency types referenced from the latest version while staying | ||
| // unchanged. [`super::test::referendum_status_v0()`] checks its immutability between v0 and | ||
| // latest version. | ||
| #[cfg(test)] | ||
| pub(super) use super::{ReferendumStatus, ReferendumStatusOf}; | ||
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| pub type ReferendumInfoOf<T, I> = ReferendumInfo< | ||
| TrackIdOf<T, I>, | ||
| PalletsOriginOf<T>, | ||
| <T as frame_system::Config>::BlockNumber, | ||
| BoundedCallOf<T, I>, | ||
| BalanceOf<T, I>, | ||
| TallyOf<T, I>, | ||
| <T as frame_system::Config>::AccountId, | ||
| ScheduleAddressOf<T, I>, | ||
| >; | ||
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| /// Info regarding a referendum, present or past. | ||
| #[derive(Encode, Decode, Clone, PartialEq, Eq, RuntimeDebug, TypeInfo, MaxEncodedLen)] | ||
| pub enum ReferendumInfo< | ||
| TrackId: Eq + PartialEq + Debug + Encode + Decode + TypeInfo + Clone, | ||
| RuntimeOrigin: Eq + PartialEq + Debug + Encode + Decode + TypeInfo + Clone, | ||
| Moment: Eq + PartialEq + Debug + Encode + Decode + TypeInfo + Clone + EncodeLike, | ||
| Call: Eq + PartialEq + Debug + Encode + Decode + TypeInfo + Clone, | ||
| Balance: Eq + PartialEq + Debug + Encode + Decode + TypeInfo + Clone, | ||
| Tally: Eq + PartialEq + Debug + Encode + Decode + TypeInfo + Clone, | ||
| AccountId: Eq + PartialEq + Debug + Encode + Decode + TypeInfo + Clone, | ||
| ScheduleAddress: Eq + PartialEq + Debug + Encode + Decode + TypeInfo + Clone, | ||
| > { | ||
| /// Referendum has been submitted and is being voted on. | ||
| Ongoing( | ||
| ReferendumStatus< | ||
| TrackId, | ||
| RuntimeOrigin, | ||
| Moment, | ||
| Call, | ||
| Balance, | ||
| Tally, | ||
| AccountId, | ||
| ScheduleAddress, | ||
| >, | ||
| ), | ||
| /// Referendum finished with approval. Submission deposit is held. | ||
| Approved(Moment, Deposit<AccountId, Balance>, Option<Deposit<AccountId, Balance>>), | ||
| /// Referendum finished with rejection. Submission deposit is held. | ||
| Rejected(Moment, Deposit<AccountId, Balance>, Option<Deposit<AccountId, Balance>>), | ||
| /// Referendum finished with cancellation. Submission deposit is held. | ||
| Cancelled(Moment, Deposit<AccountId, Balance>, Option<Deposit<AccountId, Balance>>), | ||
| /// Referendum finished and was never decided. Submission deposit is held. | ||
| TimedOut(Moment, Deposit<AccountId, Balance>, Option<Deposit<AccountId, Balance>>), | ||
| /// Referendum finished with a kill. | ||
| Killed(Moment), | ||
| } | ||
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| #[storage_alias] | ||
| pub type ReferendumInfoFor<T: Config<I>, I: 'static> = | ||
| StorageMap<Pallet<T, I>, Blake2_128Concat, ReferendumIndex, ReferendumInfoOf<T, I>>; | ||
| } | ||
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| pub mod v1 { | ||
| use super::*; | ||
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| /// The log target. | ||
| const TARGET: &'static str = "runtime::democracy::migration::v1"; | ||
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| /// Transforms a submission deposit of ReferendumInfo(Approved|Rejected|Cancelled|TimedOut) to | ||
| /// optional value, making it refundable. | ||
| pub struct MigrateV0ToV1<T, I = ()>(PhantomData<(T, I)>); | ||
| impl<T: Config<I>, I: 'static> OnRuntimeUpgrade for MigrateV0ToV1<T, I> { | ||
| #[cfg(feature = "try-runtime")] | ||
| fn pre_upgrade() -> Result<Vec<u8>, &'static str> { | ||
| let onchain_version = Pallet::<T, I>::on_chain_storage_version(); | ||
| assert_eq!(onchain_version, 0, "migration from version 0 to 1."); | ||
| let referendum_count = v0::ReferendumInfoFor::<T, I>::iter().count(); | ||
| log::info!( | ||
| target: TARGET, | ||
| "pre-upgrade state contains '{}' referendums.", | ||
| referendum_count | ||
| ); | ||
| Ok((referendum_count as u32).encode()) | ||
| } | ||
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| fn on_runtime_upgrade() -> Weight { | ||
| let current_version = Pallet::<T, I>::current_storage_version(); | ||
| let onchain_version = Pallet::<T, I>::on_chain_storage_version(); | ||
| let mut weight = T::DbWeight::get().reads(1); | ||
| log::info!( | ||
| target: TARGET, | ||
| "running migration with current storage version {:?} / onchain {:?}.", | ||
| current_version, | ||
| onchain_version | ||
| ); | ||
| if onchain_version != 0 { | ||
| log::warn!(target: TARGET, "skipping migration from v0 to v1."); | ||
| return weight | ||
| } | ||
| v0::ReferendumInfoFor::<T, I>::iter().for_each(|(key, value)| { | ||
| let maybe_new_value = match value { | ||
| v0::ReferendumInfo::Ongoing(_) | v0::ReferendumInfo::Killed(_) => None, | ||
| v0::ReferendumInfo::Approved(e, s, d) => | ||
| Some(ReferendumInfo::Approved(e, Some(s), d)), | ||
| v0::ReferendumInfo::Rejected(e, s, d) => | ||
| Some(ReferendumInfo::Rejected(e, Some(s), d)), | ||
| v0::ReferendumInfo::Cancelled(e, s, d) => | ||
| Some(ReferendumInfo::Cancelled(e, Some(s), d)), | ||
| v0::ReferendumInfo::TimedOut(e, s, d) => | ||
| Some(ReferendumInfo::TimedOut(e, Some(s), d)), | ||
| }; | ||
| if let Some(new_value) = maybe_new_value { | ||
| weight.saturating_accrue(T::DbWeight::get().reads_writes(1, 1)); | ||
| log::info!(target: TARGET, "migrating referendum #{:?}", &key); | ||
| ReferendumInfoFor::<T, I>::insert(key, new_value); | ||
| } else { | ||
| weight.saturating_accrue(T::DbWeight::get().reads(1)); | ||
| } | ||
| }); | ||
| StorageVersion::new(1).put::<Pallet<T, I>>(); | ||
| weight.saturating_accrue(T::DbWeight::get().writes(1)); | ||
| weight | ||
| } | ||
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| #[cfg(feature = "try-runtime")] | ||
| fn post_upgrade(state: Vec<u8>) -> Result<(), &'static str> { | ||
| let onchain_version = Pallet::<T, I>::on_chain_storage_version(); | ||
| assert_eq!(onchain_version, 1, "must upgrade from version 0 to 1."); | ||
| let pre_referendum_count: u32 = Decode::decode(&mut &state[..]) | ||
| .expect("failed to decode the state from pre-upgrade."); | ||
| let post_referendum_count = ReferendumInfoFor::<T, I>::iter().count() as u32; | ||
| assert_eq!( | ||
| post_referendum_count, pre_referendum_count, | ||
| "must migrate all referendums." | ||
| ); | ||
| log::info!(target: TARGET, "migrated all referendums."); | ||
| Ok(()) | ||
| } | ||
| } | ||
| } | ||
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| #[cfg(test)] | ||
| pub mod test { | ||
| use super::*; | ||
| use crate::mock::{Test as T, *}; | ||
| use core::str::FromStr; | ||
|
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| // create referendum status v0. | ||
| fn create_status_v0() -> v0::ReferendumStatusOf<T, ()> { | ||
| let origin: OriginCaller = frame_system::RawOrigin::Root.into(); | ||
| let track = <T as Config<()>>::Tracks::track_for(&origin).unwrap(); | ||
| v0::ReferendumStatusOf::<T, ()> { | ||
| track, | ||
| in_queue: true, | ||
| origin, | ||
| proposal: set_balance_proposal_bounded(1), | ||
| enactment: DispatchTime::At(1), | ||
| tally: TallyOf::<T, ()>::new(track), | ||
| submission_deposit: Deposit { who: 1, amount: 10 }, | ||
| submitted: 1, | ||
| decision_deposit: None, | ||
| alarm: None, | ||
| deciding: None, | ||
| } | ||
| } | ||
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| #[test] | ||
| pub fn referendum_status_v0() { | ||
| // make sure the bytes of the encoded referendum v0 is decodable. | ||
| let ongoing_encoded = sp_core::Bytes::from_str("0x00000000013001012a000000000000000400000100000000000000010000000000000001000000000000000a00000000000000000000000000000000000100").unwrap(); | ||
| let ongoing_dec = v0::ReferendumInfoOf::<T, ()>::decode(&mut &*ongoing_encoded).unwrap(); | ||
| let ongoing = v0::ReferendumInfoOf::<T, ()>::Ongoing(create_status_v0()); | ||
| assert_eq!(ongoing, ongoing_dec); | ||
| } | ||
|
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| #[test] | ||
| fn migration_v0_to_v1_works() { | ||
| new_test_ext().execute_with(|| { | ||
| // create and insert into the storage an ongoing referendum v0. | ||
| let status_v0 = create_status_v0(); | ||
| let ongoing_v0 = v0::ReferendumInfoOf::<T, ()>::Ongoing(status_v0.clone()); | ||
| v0::ReferendumInfoFor::<T, ()>::insert(2, ongoing_v0); | ||
| // create and insert into the storage an approved referendum v0. | ||
| let approved_v0 = v0::ReferendumInfoOf::<T, ()>::Approved( | ||
| 123, | ||
| Deposit { who: 1, amount: 10 }, | ||
| Some(Deposit { who: 2, amount: 20 }), | ||
| ); | ||
| v0::ReferendumInfoFor::<T, ()>::insert(5, approved_v0); | ||
| // run migration from v0 to v1. | ||
| v1::MigrateV0ToV1::<T, ()>::on_runtime_upgrade(); | ||
| // fetch and assert migrated into v1 the ongoing referendum. | ||
| let ongoing_v1 = ReferendumInfoFor::<T, ()>::get(2).unwrap(); | ||
| // referendum status schema is the same for v0 and v1. | ||
| assert_eq!(ReferendumInfoOf::<T, ()>::Ongoing(status_v0), ongoing_v1); | ||
| // fetch and assert migrated into v1 the approved referendum. | ||
| let approved_v1 = ReferendumInfoFor::<T, ()>::get(5).unwrap(); | ||
| assert_eq!( | ||
| approved_v1, | ||
| ReferendumInfoOf::<T, ()>::Approved( | ||
| 123, | ||
| Some(Deposit { who: 1, amount: 10 }), | ||
| Some(Deposit { who: 2, amount: 20 }) | ||
| ) | ||
| ); | ||
| }); | ||
| } | ||
| } |
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