able to change redeem currency

modules/liquid-crowdloan/src/lib.rs

@@ -27,7 +27,7 @@ use frame_support::{pallet_prelude::*, traits::EnsureOrigin, PalletId};
 use frame_system::pallet_prelude::*;
 use orml_traits::MultiCurrency;
 use primitives::{Balance, CurrencyId};
-use sp_runtime::traits::AccountIdConversion;
+use sp_runtime::{traits::AccountIdConversion, ArithmeticError};
 
 use support::CrowdloanVaultXcm;
 
@@ -79,11 +79,17 @@ pub mod module {
 	#[pallet::generate_deposit(fn deposit_event)]
 	pub enum Event<T: Config> {
 		/// Liquid Crowdloan asset was redeemed.
-		Redeemed { amount: Balance },
+		Redeemed { currency_id: CurrencyId, amount: Balance },
 		/// The transfer from relay chain crowdloan vault was requested.
 		TransferFromCrowdloanVaultRequested { amount: Balance },
+		/// The redeem currency id was updated.
+		RedeemCurrencyIdUpdated { currency_id: CurrencyId },
 	}
 
+	/// The redeem currency id.
+	#[pallet::storage]
+	pub(crate) type RedeemCurrencyId<T: Config> = StorageValue<_, CurrencyId, OptionQuery>;
+
 	#[pallet::pallet]
 	pub struct Pallet<T>(_);
 	#[pallet::call]
@@ -94,11 +100,33 @@ pub mod module {
 		pub fn redeem(origin: OriginFor<T>, #[pallet::compact] amount: Balance) -> DispatchResult {
 			let who = ensure_signed(origin)?;
 
-			T::Currency::withdraw(T::LiquidCrowdloanCurrencyId::get(), &who, amount)?;
+			let (currency_id, redeem_amount) = if let Some(redeem_currency_id) = RedeemCurrencyId::<T>::get() {
+				// redeem the RedeemCurrencyId
+				// amount_pect = amount / lcdot_total_supply
+				// amount_redeem = amount_pect * redeem_currency_balance
+
+				let redeem_currency_balance = T::Currency::free_balance(redeem_currency_id, &Self::account_id());
+				let lcdot_total_supply = T::Currency::total_issuance(T::LiquidCrowdloanCurrencyId::get());
+
+				let amount_redeem = amount
+					.checked_mul(redeem_currency_balance)
+					.and_then(|x| x.checked_div(lcdot_total_supply))
+					.ok_or(ArithmeticError::Overflow)?;
 
-			T::Currency::transfer(T::RelayChainCurrencyId::get(), &Self::account_id(), &who, amount)?;
+				(redeem_currency_id, amount_redeem)
+			} else {
+				// redeem DOT
+				let currency_id = T::RelayChainCurrencyId::get();
+				(currency_id, amount)
+			};
 
-			Self::deposit_event(Event::Redeemed { amount });
+			T::Currency::withdraw(T::LiquidCrowdloanCurrencyId::get(), &who, amount)?;
+			T::Currency::transfer(currency_id, &Self::account_id(), &who, redeem_amount)?;
+
+			Self::deposit_event(Event::Redeemed {
+				currency_id,
+				amount: redeem_amount,
+			});
 
 			Ok(())
 		}
@@ -125,6 +153,21 @@ pub mod module {
 
 			Ok(())
 		}
+
+		/// Set the redeem currency id.
+		///
+		/// This call requires `GovernanceOrigin`.
+		#[pallet::call_index(2)]
+		#[pallet::weight(<T as Config>::WeightInfo::set_redeem_currency_id())]
+		pub fn set_redeem_currency_id(origin: OriginFor<T>, currency_id: CurrencyId) -> DispatchResult {
+			T::GovernanceOrigin::ensure_origin(origin)?;
+
+			<RedeemCurrencyId<T>>::put(currency_id);
+
+			Self::deposit_event(Event::RedeemCurrencyIdUpdated { currency_id });
+
+			Ok(())
+		}
 	}
 }
 

modules/liquid-crowdloan/src/mock.rs

@@ -41,6 +41,7 @@ pub type BlockNumber = u64;
 pub const ACA: CurrencyId = CurrencyId::Token(TokenSymbol::ACA);
 pub const DOT: CurrencyId = CurrencyId::Token(TokenSymbol::DOT);
 pub const LDOT: CurrencyId = CurrencyId::Token(TokenSymbol::LDOT);
+pub const LCDOT: CurrencyId = CurrencyId::LiquidCrowdloan(13);
 
 pub const ALICE: AccountId = AccountId32::new([1u8; 32]);
 pub const BOB: AccountId = AccountId32::new([2u8; 32]);
@@ -116,8 +117,9 @@ parameter_types! {
 	pub Erc20HoldingAccount: H160 = H160::from_low_u64_be(1);
 	pub CrowdloanVault: AccountId = VAULT;
 	pub LiquidCrowdloanPalletId: PalletId = PalletId(*b"aca/lqcl");
-	pub const Ldot: CurrencyId = LDOT;
-	pub const Dot: CurrencyId = DOT;
+	pub const GetLDOT: CurrencyId = LDOT;
+	pub const GetDOT: CurrencyId = DOT;
+	pub const GetLCDOT: CurrencyId = LCDOT;
 }
 
 impl module_currencies::Config for Runtime {
@@ -162,8 +164,8 @@ ord_parameter_types! {
 impl liquid_crowdloan::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
 	type Currency = Currencies;
-	type LiquidCrowdloanCurrencyId = Ldot;
-	type RelayChainCurrencyId = Dot;
+	type LiquidCrowdloanCurrencyId = GetLCDOT;
+	type RelayChainCurrencyId = GetDOT;
 	type PalletId = LiquidCrowdloanPalletId;
 	type GovernanceOrigin = EnsureSignedBy<Alice, AccountId>;
 	type CrowdloanVault = CrowdloanVault;

modules/liquid-crowdloan/src/tests.rs

@@ -29,14 +29,17 @@ use sp_runtime::traits::BadOrigin;
 #[test]
 fn redeem_works() {
 	ExtBuilder::default()
-		.balances(vec![(BOB, LDOT, 100), (LiquidCrowdloan::account_id(), DOT, 100)])
+		.balances(vec![(BOB, LCDOT, 100), (LiquidCrowdloan::account_id(), DOT, 100)])
 		.build()
 		.execute_with(|| {
 			assert_ok!(LiquidCrowdloan::redeem(RuntimeOrigin::signed(BOB), 100));
-			assert_eq!(Currencies::free_balance(LDOT, &BOB), 0);
+			assert_eq!(Currencies::free_balance(LCDOT, &BOB), 0);
 			assert_eq!(Currencies::free_balance(DOT, &BOB), 100);
 			assert_eq!(Currencies::free_balance(DOT, &LiquidCrowdloan::account_id()), 0);
-			System::assert_last_event(RuntimeEvent::LiquidCrowdloan(crate::Event::Redeemed { amount: 100 }));
+			System::assert_last_event(RuntimeEvent::LiquidCrowdloan(crate::Event::Redeemed {
+				currency_id: DOT,
+				amount: 100,
+			}));
 		});
 }
 
@@ -47,13 +50,18 @@ fn redeem_fails_if_not_enough_liquid_crowdloan_token() {
 			LiquidCrowdloan::redeem(RuntimeOrigin::signed(BOB), 100),
 			orml_tokens::Error::<Runtime>::BalanceTooLow
 		);
+
+		assert_err!(
+			LiquidCrowdloan::redeem(RuntimeOrigin::signed(BOB), u128::MAX),
+			orml_tokens::Error::<Runtime>::BalanceTooLow
+		);
 	});
 }
 
 #[test]
 fn redeem_fails_if_not_enough_relay_chain_token() {
 	ExtBuilder::default()
-		.balances(vec![(BOB, LDOT, 100)])
+		.balances(vec![(BOB, LCDOT, 100)])
 		.build()
 		.execute_with(|| {
 			assert_err!(
@@ -95,3 +103,65 @@ fn transfer_from_crowdloan_vault_fails_if_sending_xcm_failed() {
 		);
 	})
 }
+
+#[test]
+fn set_redeem_currency_id() {
+	ExtBuilder::default()
+		.balances(vec![
+			(ALICE, LCDOT, 100),
+			(BOB, LCDOT, 100),
+			(LiquidCrowdloan::account_id(), LDOT, 2200),
+		])
+		.build()
+		.execute_with(|| {
+			assert_ok!(LiquidCrowdloan::set_redeem_currency_id(
+				RuntimeOrigin::signed(ALICE),
+				LDOT
+			));
+
+			assert_err!(
+				LiquidCrowdloan::redeem(RuntimeOrigin::signed(ALICE), u128::MAX),
+				sp_runtime::ArithmeticError::Overflow
+			);
+
+			assert_ok!(LiquidCrowdloan::redeem(RuntimeOrigin::signed(ALICE), 10));
+			assert_eq!(Currencies::free_balance(LCDOT, &ALICE), 90);
+			assert_eq!(Currencies::free_balance(LDOT, &ALICE), 110);
+			assert_eq!(Currencies::free_balance(LDOT, &LiquidCrowdloan::account_id()), 2090);
+			assert_eq!(Currencies::total_issuance(LCDOT), 190);
+			System::assert_last_event(RuntimeEvent::LiquidCrowdloan(crate::Event::Redeemed {
+				currency_id: LDOT,
+				amount: 110,
+			}));
+
+			assert_ok!(LiquidCrowdloan::redeem(RuntimeOrigin::signed(ALICE), 10));
+			assert_eq!(Currencies::free_balance(LCDOT, &ALICE), 80);
+			assert_eq!(Currencies::free_balance(LDOT, &ALICE), 220);
+			assert_eq!(Currencies::free_balance(LDOT, &LiquidCrowdloan::account_id()), 1980);
+			assert_eq!(Currencies::total_issuance(LCDOT), 180);
+			System::assert_last_event(RuntimeEvent::LiquidCrowdloan(crate::Event::Redeemed {
+				currency_id: LDOT,
+				amount: 110,
+			}));
+
+			assert_ok!(LiquidCrowdloan::redeem(RuntimeOrigin::signed(ALICE), 80));
+			assert_eq!(Currencies::free_balance(LCDOT, &ALICE), 0);
+			assert_eq!(Currencies::free_balance(LDOT, &ALICE), 1100);
+			assert_eq!(Currencies::free_balance(LDOT, &LiquidCrowdloan::account_id()), 1100);
+			assert_eq!(Currencies::total_issuance(LCDOT), 100);
+			System::assert_last_event(RuntimeEvent::LiquidCrowdloan(crate::Event::Redeemed {
+				currency_id: LDOT,
+				amount: 880,
+			}));
+
+			assert_ok!(LiquidCrowdloan::redeem(RuntimeOrigin::signed(BOB), 100));
+			assert_eq!(Currencies::free_balance(LCDOT, &BOB), 0);
+			assert_eq!(Currencies::free_balance(LDOT, &BOB), 1100);
+			assert_eq!(Currencies::free_balance(LDOT, &LiquidCrowdloan::account_id()), 0);
+			assert_eq!(Currencies::total_issuance(LCDOT), 0);
+			System::assert_last_event(RuntimeEvent::LiquidCrowdloan(crate::Event::Redeemed {
+				currency_id: LDOT,
+				amount: 1100,
+			}));
+		});
+}

modules/liquid-crowdloan/src/weights.rs

@@ -19,12 +19,12 @@
 //! Autogenerated weights for module_liquid_crowdloan
 //!
 //! THIS FILE WAS AUTO-GENERATED USING THE SUBSTRATE BENCHMARK CLI VERSION 4.0.0-dev
-//! DATE: 2023-06-02, STEPS: `50`, REPEAT: 20, LOW RANGE: `[]`, HIGH RANGE: `[]`
-//! HOSTNAME: `ip-172-31-40-233`, CPU: `Intel(R) Xeon(R) Platinum 8375C CPU @ 2.90GHz`
+//! DATE: 2023-07-07, STEPS: `50`, REPEAT: 20, LOW RANGE: `[]`, HIGH RANGE: `[]`
+//! HOSTNAME: `bryan-mbp-m1.local`, CPU: `<UNKNOWN>`
 //! EXECUTION: Some(Wasm), WASM-EXECUTION: Compiled, CHAIN: Some("dev"), DB CACHE: 1024
 
 // Executed Command:
-// target/release/acala
+// target/debug/acala
 // benchmark
 // pallet
 // --chain=dev
@@ -49,6 +49,7 @@ use sp_std::marker::PhantomData;
 pub trait WeightInfo {
 	fn redeem() -> Weight;
 	fn transfer_from_crowdloan_vault() -> Weight;
+	fn set_redeem_currency_id() -> Weight;
 }
 
 /// Weights for module_liquid_crowdloan using the Acala node and recommended hardware.
@@ -60,15 +61,17 @@ impl<T: frame_system::Config> WeightInfo for AcalaWeight<T> {
 	// Proof: Tokens TotalIssuance (max_values: None, max_size: Some(67), added: 2542, mode: MaxEncodedLen)
 	// Storage: EvmAccounts EvmAddresses (r:2 w:0)
 	// Proof: EvmAccounts EvmAddresses (max_values: None, max_size: Some(60), added: 2535, mode: MaxEncodedLen)
+	// Storage: LiquidCrowdloan RedeemCurrencyId (r:1 w:0)
+	// Proof: LiquidCrowdloan RedeemCurrencyId (max_values: Some(1), max_size: Some(43), added: 538, mode: MaxEncodedLen)
 	// Storage: System Account (r:1 w:1)
 	// Proof: System Account (max_values: None, max_size: Some(128), added: 2603, mode: MaxEncodedLen)
 	fn redeem() -> Weight {
 		// Proof Size summary in bytes:
-		//  Measured:  `2927`
-		//  Estimated: `22041`
-		// Minimum execution time: 125_572 nanoseconds.
-		Weight::from_parts(128_915_000, 22041)
-			.saturating_add(T::DbWeight::get().reads(7))
+		//  Measured:  `2931`
+		//  Estimated: `8856`
+		// Minimum execution time: 1_062_000 nanoseconds.
+		Weight::from_parts(1_075_000_000, 8856)
+			.saturating_add(T::DbWeight::get().reads(8))
 			.saturating_add(T::DbWeight::get().writes(5))
 	}
 	// Storage: XcmInterface XcmDestWeightAndFee (r:1 w:0)
@@ -82,12 +85,22 @@ impl<T: frame_system::Config> WeightInfo for AcalaWeight<T> {
 	fn transfer_from_crowdloan_vault() -> Weight {
 		// Proof Size summary in bytes:
 		//  Measured:  `1255`
-		//  Estimated: `11689`
-		// Minimum execution time: 46_004 nanoseconds.
-		Weight::from_parts(46_711_000, 11689)
+		//  Estimated: `4720`
+		// Minimum execution time: 357_000 nanoseconds.
+		Weight::from_parts(362_000_000, 4720)
 			.saturating_add(T::DbWeight::get().reads(4))
 			.saturating_add(T::DbWeight::get().writes(1))
 	}
+	// Storage: LiquidCrowdloan RedeemCurrencyId (r:0 w:1)
+	// Proof: LiquidCrowdloan RedeemCurrencyId (max_values: Some(1), max_size: Some(43), added: 538, mode: MaxEncodedLen)
+	fn set_redeem_currency_id() -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `1001`
+		//  Estimated: `0`
+		// Minimum execution time: 156_000 nanoseconds.
+		Weight::from_parts(163_000_000, 0)
+			.saturating_add(T::DbWeight::get().writes(1))
+	}
 }
 
 // For backwards compatibility and tests
@@ -98,15 +111,17 @@ impl WeightInfo for () {
 	// Proof: Tokens TotalIssuance (max_values: None, max_size: Some(67), added: 2542, mode: MaxEncodedLen)
 	// Storage: EvmAccounts EvmAddresses (r:2 w:0)
 	// Proof: EvmAccounts EvmAddresses (max_values: None, max_size: Some(60), added: 2535, mode: MaxEncodedLen)
+	// Storage: LiquidCrowdloan RedeemCurrencyId (r:1 w:0)
+	// Proof: LiquidCrowdloan RedeemCurrencyId (max_values: Some(1), max_size: Some(43), added: 538, mode: MaxEncodedLen)
 	// Storage: System Account (r:1 w:1)
 	// Proof: System Account (max_values: None, max_size: Some(128), added: 2603, mode: MaxEncodedLen)
 	fn redeem() -> Weight {
 		// Proof Size summary in bytes:
-		//  Measured:  `2927`
-		//  Estimated: `22041`
-		// Minimum execution time: 125_572 nanoseconds.
-		Weight::from_parts(128_915_000, 22041)
-			.saturating_add(RocksDbWeight::get().reads(7))
+		//  Measured:  `2931`
+		//  Estimated: `8856`
+		// Minimum execution time: 1_062_000 nanoseconds.
+		Weight::from_parts(1_075_000_000, 8856)
+			.saturating_add(RocksDbWeight::get().reads(8))
 			.saturating_add(RocksDbWeight::get().writes(5))
 	}
 	// Storage: XcmInterface XcmDestWeightAndFee (r:1 w:0)
@@ -120,10 +135,20 @@ impl WeightInfo for () {
 	fn transfer_from_crowdloan_vault() -> Weight {
 		// Proof Size summary in bytes:
 		//  Measured:  `1255`
-		//  Estimated: `11689`
-		// Minimum execution time: 46_004 nanoseconds.
-		Weight::from_parts(46_711_000, 11689)
+		//  Estimated: `4720`
+		// Minimum execution time: 357_000 nanoseconds.
+		Weight::from_parts(362_000_000, 4720)
 			.saturating_add(RocksDbWeight::get().reads(4))
 			.saturating_add(RocksDbWeight::get().writes(1))
 	}
+	// Storage: LiquidCrowdloan RedeemCurrencyId (r:0 w:1)
+	// Proof: LiquidCrowdloan RedeemCurrencyId (max_values: Some(1), max_size: Some(43), added: 538, mode: MaxEncodedLen)
+	fn set_redeem_currency_id() -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `1001`
+		//  Estimated: `0`
+		// Minimum execution time: 156_000 nanoseconds.
+		Weight::from_parts(163_000_000, 0)
+			.saturating_add(RocksDbWeight::get().writes(1))
+	}
 }

runtime/acala/src/weights/module_liquid_crowdloan.rs

@@ -88,4 +88,14 @@ impl<T: frame_system::Config> module_liquid_crowdloan::WeightInfo for WeightInfo
 			.saturating_add(T::DbWeight::get().reads(7))
 			.saturating_add(T::DbWeight::get().writes(2))
 	}
+
+	fn set_redeem_currency_id() -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `1392`
+		//  Estimated: `22711`
+		// Minimum execution time: 56_316 nanoseconds.
+		Weight::from_parts(57_458_000, 22711)
+			.saturating_add(T::DbWeight::get().reads(7))
+			.saturating_add(T::DbWeight::get().writes(2))
+	}
 }

runtime/mandala/src/benchmarking/liquid_crowdloan.rs

@@ -16,7 +16,10 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-use crate::{AccountId, LiquidCrowdloan, LiquidCrowdloanCurrencyId, PolkadotXcm, Runtime, RuntimeOrigin, System};
+use crate::{
+	AccountId, GetLiquidCurrencyId, LiquidCrowdloan, LiquidCrowdloanCurrencyId, PolkadotXcm, Runtime, RuntimeOrigin,
+	System,
+};
 
 use super::utils::{set_balance, STAKING};
 use frame_benchmarking::whitelisted_caller;
@@ -44,6 +47,9 @@ runtime_benchmarks! {
 	verify {
 		System::assert_last_event(module_liquid_crowdloan::Event::TransferFromCrowdloanVaultRequested { amount }.into());
 	}
+
+	set_redeem_currency_id {
+	}: _(RawOrigin::Root, GetLiquidCurrencyId::get())
 }
 
 #[cfg(test)]

runtime/mandala/src/weights/module_liquid_crowdloan.rs

@@ -82,4 +82,14 @@ impl<T: frame_system::Config> module_liquid_crowdloan::WeightInfo for WeightInfo
 			.saturating_add(T::DbWeight::get().reads(4))
 			.saturating_add(T::DbWeight::get().writes(1))
 	}
+
+	fn set_redeem_currency_id() -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `1255`
+		//  Estimated: `11689`
+		// Minimum execution time: 32_468 nanoseconds.
+		Weight::from_parts(33_256_000, 11689)
+			.saturating_add(T::DbWeight::get().reads(4))
+			.saturating_add(T::DbWeight::get().writes(1))
+	}
 }