feat: initialize Kurdistan SDK - independent fork of Polkadot SDK

pezkuwi/runtime/common/src/slots/migration.rs

@@ -0,0 +1,90 @@
+// Copyright (C) Parity Technologies (UK) Ltd.
+// This file is part of Pezkuwi.
+
+// Pezkuwi is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Pezkuwi is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Pezkuwi.  If not, see <http://www.gnu.org/licenses/>.
+
+use super::*;
+use crate::crowdloan;
+use sp_runtime::traits::AccountIdConversion;
+
+/// Migrations for using fund index to create fund accounts instead of para ID.
+pub mod slots_crowdloan_index_migration {
+	use super::*;
+
+	// The old way we generated fund accounts.
+	fn old_fund_account_id<T: Config + crowdloan::Config>(index: ParaId) -> T::AccountId {
+		<T as crowdloan::Config>::PalletId::get().into_sub_account_truncating(index)
+	}
+
+	pub fn pre_migrate<T: Config + crowdloan::Config>() -> Result<(), &'static str> {
+		for (para_id, leases) in Leases::<T>::iter() {
+			let old_fund_account = old_fund_account_id::<T>(para_id);
+
+			for (who, _amount) in leases.iter().flatten() {
+				if *who == old_fund_account {
+					let crowdloan =
+						crowdloan::Funds::<T>::get(para_id).ok_or("no crowdloan found")?;
+					log::info!(
+						target: "runtime",
+						"para_id={:?}, old_fund_account={:?}, fund_id={:?}, leases={:?}",
+						para_id, old_fund_account, crowdloan.fund_index, leases,
+					);
+					break;
+				}
+			}
+		}
+
+		Ok(())
+	}
+
+	pub fn migrate<T: Config + crowdloan::Config>() -> frame_support::weights::Weight {
+		let mut weight = Weight::zero();
+
+		for (para_id, mut leases) in Leases::<T>::iter() {
+			weight = weight.saturating_add(T::DbWeight::get().reads(2));
+			// the para id must have a crowdloan
+			if let Some(fund) = crowdloan::Funds::<T>::get(para_id) {
+				let old_fund_account = old_fund_account_id::<T>(para_id);
+				let new_fund_account = crowdloan::Pallet::<T>::fund_account_id(fund.fund_index);
+
+				// look for places the old account is used, and replace with the new account.
+				for (who, _amount) in leases.iter_mut().flatten() {
+					if *who == old_fund_account {
+						*who = new_fund_account.clone();
+					}
+				}
+
+				// insert the changes.
+				weight = weight.saturating_add(T::DbWeight::get().writes(1));
+				Leases::<T>::insert(para_id, leases);
+			}
+		}
+
+		weight
+	}
+
+	pub fn post_migrate<T: Config + crowdloan::Config>() -> Result<(), &'static str> {
+		for (para_id, leases) in Leases::<T>::iter() {
+			let old_fund_account = old_fund_account_id::<T>(para_id);
+			log::info!(target: "runtime", "checking para_id: {:?}", para_id);
+			// check the old fund account doesn't exist anywhere.
+			for (who, _amount) in leases.iter().flatten() {
+				if *who == old_fund_account {
+					panic!("old fund account found after migration!");
+				}
+			}
+		}
+		Ok(())
+	}
+}