feat(asset-index): move redemption fee to storage

runtime/common/src/constants.rs

@@ -45,6 +45,7 @@ pub const SLOT_DURATION: u64 = MILLISECS_PER_BLOCK;
 pub const MINUTES: BlockNumber = 60_000 / (MILLISECS_PER_BLOCK as BlockNumber);
 pub const HOURS: BlockNumber = MINUTES * 60;
 pub const DAYS: BlockNumber = HOURS * 24;
+pub const WEEKS: BlockNumber = DAYS * 7;
 
 // Unit = the base number of indivisible units for balances
 pub const UNIT: Balance = 1_000_000_000_000;

runtime/common/src/types.rs

@@ -1,5 +1,7 @@
 // Copyright 2021 ChainSafe Systems
 // SPDX-License-Identifier: LGPL-3.0-only
+use crate::constants::DAYS;
+use primitives::{Balance, BlockNumber};
 use sp_std::marker::PhantomData;
 
 /// Origin either `Root` or `CommitteeOrigin`
@@ -37,3 +39,18 @@ impl<T: frame_system::Config> pallet_asset_index::traits::LockupPeriodRange<T::B
 		(crate::constants::DAYS * 28).into()
 	}
 }
+
+/// Redemption fee
+pub struct RedemptionFee;
+
+impl primitives::traits::RedemptionFee<BlockNumber, Balance> for RedemptionFee {
+	fn redemption_fee(time_spent: BlockNumber, amount: Balance) -> Balance {
+		if time_spent < 7 * DAYS {
+			amount.checked_div(10).unwrap_or_default()
+		} else if time_spent < 30 * DAYS {
+			amount.checked_div(20).unwrap_or_default()
+		} else {
+			amount.checked_div(100).unwrap_or_default()
+		}
+	}
+}

runtime/dev/src/lib.rs

@@ -515,7 +515,7 @@ impl pallet_asset_index::Config for Runtime {
 	type Balance = Balance;
 	type MaxActiveDeposits = MaxActiveDeposits;
 	type MaxDecimals = MaxDecimals;
-	type RedemptionFee = ();
+	type RedemptionFee = RedemptionFee;
 	type LockupPeriod = LockupPeriodDev;
 	type LockupPeriodRange = LockupPeriodRangeDev<Self>;
 	type IndexTokenLockIdentifier = IndexTokenLockIdentifier;

runtime/kusama/src/lib.rs

@@ -479,7 +479,7 @@ impl pallet_asset_index::Config for Runtime {
 	type Balance = Balance;
 	type MaxActiveDeposits = MaxActiveDeposits;
 	type MaxDecimals = MaxDecimals;
-	type RedemptionFee = ();
+	type RedemptionFee = RedemptionFee;
 	type LockupPeriod = LockupPeriod;
 	type LockupPeriodRange = LockupPeriodRange<Self>;
 	type IndexTokenLockIdentifier = IndexTokenLockIdentifier;

runtime/polkadot/src/lib.rs

@@ -482,7 +482,7 @@ impl pallet_asset_index::Config for Runtime {
 	type Balance = Balance;
 	type MaxActiveDeposits = MaxActiveDeposits;
 	type MaxDecimals = MaxDecimals;
-	type RedemptionFee = ();
+	type RedemptionFee = RedemptionFee;
 	type LockupPeriod = LockupPeriod;
 	type LockupPeriodRange = LockupPeriodRange<Self>;
 	type IndexTokenLockIdentifier = IndexTokenLockIdentifier;