1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
// This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// 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.

//! # Balances Pallet
//!
//! The Balances pallet provides functionality for handling accounts and balances.
//!
//! - [`Config`]
//! - [`Call`]
//! - [`Pallet`]
//!
//! ## Overview
//!
//! The Balances pallet provides functions for:
//!
//! - Getting and setting free balances.
//! - Retrieving total, reserved and unreserved balances.
//! - Repatriating a reserved balance to a beneficiary account that exists.
//! - Transferring a balance between accounts (when not reserved).
//! - Slashing an account balance.
//! - Account creation and removal.
//! - Managing total issuance.
//! - Setting and managing locks.
//!
//! ### Terminology
//!
//! - **Existential Deposit:** The minimum balance required to create or keep an account open. This
//!   prevents "dust accounts" from filling storage. When the free plus the reserved balance (i.e.
//!   the total balance) fall below this, then the account is said to be dead; and it loses its
//!   functionality as well as any prior history and all information on it is removed from the
//!   chain's state. No account should ever have a total balance that is strictly between 0 and the
//!   existential deposit (exclusive). If this ever happens, it indicates either a bug in this
//!   pallet or an erroneous raw mutation of storage.
//!
//! - **Total Issuance:** The total number of units in existence in a system.
//!
//! - **Reaping an account:** The act of removing an account by resetting its nonce. Happens after
//!   its total balance has become zero (or, strictly speaking, less than the Existential Deposit).
//!
//! - **Free Balance:** The portion of a balance that is not reserved. The free balance is the only
//!   balance that matters for most operations.
//!
//! - **Reserved Balance:** Reserved balance still belongs to the account holder, but is suspended.
//!   Reserved balance can still be slashed, but only after all the free balance has been slashed.
//!
//! - **Imbalance:** A condition when some funds were credited or debited without equal and opposite
//!   accounting (i.e. a difference between total issuance and account balances). Functions that
//! result in an imbalance will return an object of the `Imbalance` trait that can be managed within
//! your runtime logic. (If an imbalance is simply dropped, it should automatically maintain any
//! book-keeping such as total issuance.)
//!
//! - **Lock:** A freeze on a specified amount of an account's free balance until a specified block
//!   number. Multiple locks always operate over the same funds, so they "overlay" rather than
//! "stack".
//!
//! ### Implementations
//!
//! The Balances pallet provides implementations for the following traits. If these traits provide
//! the functionality that you need, then you can avoid coupling with the Balances pallet.
//!
//! - [`Currency`]: Functions for dealing with a
//! fungible assets system.
//! - [`ReservableCurrency`]
//! - [`NamedReservableCurrency`](frame_support::traits::NamedReservableCurrency):
//! Functions for dealing with assets that can be reserved from an account.
//! - [`LockableCurrency`](frame_support::traits::LockableCurrency): Functions for
//! dealing with accounts that allow liquidity restrictions.
//! - [`Imbalance`](frame_support::traits::Imbalance): Functions for handling
//! imbalances between total issuance in the system and account balances. Must be used when a
//! function creates new funds (e.g. a reward) or destroys some funds (e.g. a system fee).
//!
//! ## Interface
//!
//! ### Dispatchable Functions
//!
//! - `transfer_allow_death` - Transfer some liquid free balance to another account.
//! - `force_set_balance` - Set the balances of a given account. The origin of this call must be
//!   root.
//!
//! ## Usage
//!
//! The following examples show how to use the Balances pallet in your custom pallet.
//!
//! ### Examples from the FRAME
//!
//! The Contract pallet uses the `Currency` trait to handle gas payment, and its types inherit from
//! `Currency`:
//!
//! ```
//! use frame_support::traits::Currency;
//! # pub trait Config: frame_system::Config {
//! #   type Currency: Currency<Self::AccountId>;
//! # }
//!
//! pub type BalanceOf<T> = <<T as Config>::Currency as Currency<<T as frame_system::Config>::AccountId>>::Balance;
//! pub type NegativeImbalanceOf<T> = <<T as Config>::Currency as Currency<<T as frame_system::Config>::AccountId>>::NegativeImbalance;
//!
//! # fn main() {}
//! ```
//!
//! The Staking pallet uses the `LockableCurrency` trait to lock a stash account's funds:
//!
//! ```
//! use frame_support::traits::{WithdrawReasons, LockableCurrency};
//! use sp_runtime::traits::Bounded;
//! pub trait Config: frame_system::Config {
//!     type Currency: LockableCurrency<Self::AccountId, Moment=frame_system::pallet_prelude::BlockNumberFor<Self>>;
//! }
//! # struct StakingLedger<T: Config> {
//! #   stash: <T as frame_system::Config>::AccountId,
//! #   total: <<T as Config>::Currency as frame_support::traits::Currency<<T as frame_system::Config>::AccountId>>::Balance,
//! #   phantom: std::marker::PhantomData<T>,
//! # }
//! # const STAKING_ID: [u8; 8] = *b"staking ";
//!
//! fn update_ledger<T: Config>(
//!     controller: &T::AccountId,
//!     ledger: &StakingLedger<T>
//! ) {
//!     T::Currency::set_lock(
//!         STAKING_ID,
//!         &ledger.stash,
//!         ledger.total,
//!         WithdrawReasons::all()
//!     );
//!     // <Ledger<T>>::insert(controller, ledger); // Commented out as we don't have access to Staking's storage here.
//! }
//! # fn main() {}
//! ```
//!
//! ## Genesis config
//!
//! The Balances pallet depends on the [`GenesisConfig`].
//!
//! ## Assumptions
//!
//! * Total issued balanced of all accounts should be less than `Config::Balance::max_value()`.
//! * Existential Deposit is set to a value greater than zero.
//!
//! Note, you may find the Balances pallet still functions with an ED of zero in some circumstances,
//! however this is not a configuration which is generally supported, nor will it be.

#![cfg_attr(not(feature = "std"), no_std)]
mod benchmarking;
mod impl_currency;
mod impl_fungible;
pub mod migration;
mod tests;
mod types;
pub mod weights;

use codec::{Codec, MaxEncodedLen};
use frame_support::{
	ensure,
	pallet_prelude::DispatchResult,
	traits::{
		tokens::{
			fungible, BalanceStatus as Status, DepositConsequence,
			Fortitude::{self, Force, Polite},
			Preservation::{Expendable, Preserve, Protect},
			WithdrawConsequence,
		},
		Currency, Defensive, Get, OnUnbalanced, ReservableCurrency, StoredMap,
	},
	BoundedSlice, WeakBoundedVec,
};
use frame_system as system;
pub use impl_currency::{NegativeImbalance, PositiveImbalance};
use scale_info::TypeInfo;
use sp_runtime::{
	traits::{
		AtLeast32BitUnsigned, Bounded, CheckedAdd, CheckedSub, MaybeSerializeDeserialize,
		Saturating, StaticLookup, Zero,
	},
	ArithmeticError, DispatchError, FixedPointOperand, Perbill, RuntimeDebug, TokenError,
};
use sp_std::{cmp, fmt::Debug, mem, prelude::*, result};
pub use types::{
	AccountData, AdjustmentDirection, BalanceLock, DustCleaner, ExtraFlags, IdAmount, Reasons,
	ReserveData,
};
pub use weights::WeightInfo;

pub use pallet::*;

const LOG_TARGET: &str = "runtime::balances";

type AccountIdLookupOf<T> = <<T as frame_system::Config>::Lookup as StaticLookup>::Source;

#[frame_support::pallet]
pub mod pallet {
	use super::*;
	use frame_support::{
		pallet_prelude::*,
		traits::{fungible::Credit, tokens::Precision, VariantCount, VariantCountOf},
	};
	use frame_system::pallet_prelude::*;

	pub type CreditOf<T, I> = Credit<<T as frame_system::Config>::AccountId, Pallet<T, I>>;

	/// Default implementations of [`DefaultConfig`], which can be used to implement [`Config`].
	pub mod config_preludes {
		use super::*;
		use frame_support::{derive_impl, traits::ConstU64};

		pub struct TestDefaultConfig;

		#[derive_impl(frame_system::config_preludes::TestDefaultConfig as frame_system::DefaultConfig, no_aggregated_types)]
		impl frame_system::DefaultConfig for TestDefaultConfig {}

		#[frame_support::register_default_impl(TestDefaultConfig)]
		impl DefaultConfig for TestDefaultConfig {
			#[inject_runtime_type]
			type RuntimeEvent = ();
			#[inject_runtime_type]
			type RuntimeHoldReason = ();
			#[inject_runtime_type]
			type RuntimeFreezeReason = ();

			type Balance = u64;
			type ExistentialDeposit = ConstU64<1>;

			type ReserveIdentifier = ();
			type FreezeIdentifier = ();

			type DustRemoval = ();

			type MaxLocks = ConstU32<100>;
			type MaxReserves = ConstU32<100>;
			type MaxFreezes = ConstU32<100>;

			type WeightInfo = ();
		}
	}

	#[pallet::config(with_default)]
	pub trait Config<I: 'static = ()>: frame_system::Config {
		/// The overarching event type.
		#[pallet::no_default_bounds]
		type RuntimeEvent: From<Event<Self, I>>
			+ IsType<<Self as frame_system::Config>::RuntimeEvent>;

		/// The overarching hold reason.
		#[pallet::no_default_bounds]
		type RuntimeHoldReason: Parameter + Member + MaxEncodedLen + Copy + VariantCount;

		/// The overarching freeze reason.
		#[pallet::no_default_bounds]
		type RuntimeFreezeReason: VariantCount;

		/// Weight information for extrinsics in this pallet.
		type WeightInfo: WeightInfo;

		/// The balance of an account.
		type Balance: Parameter
			+ Member
			+ AtLeast32BitUnsigned
			+ Codec
			+ Default
			+ Copy
			+ MaybeSerializeDeserialize
			+ Debug
			+ MaxEncodedLen
			+ TypeInfo
			+ FixedPointOperand;

		/// Handler for the unbalanced reduction when removing a dust account.
		#[pallet::no_default_bounds]
		type DustRemoval: OnUnbalanced<CreditOf<Self, I>>;

		/// The minimum amount required to keep an account open. MUST BE GREATER THAN ZERO!
		///
		/// If you *really* need it to be zero, you can enable the feature `insecure_zero_ed` for
		/// this pallet. However, you do so at your own risk: this will open up a major DoS vector.
		/// In case you have multiple sources of provider references, you may also get unexpected
		/// behaviour if you set this to zero.
		///
		/// Bottom line: Do yourself a favour and make it at least one!
		#[pallet::constant]
		#[pallet::no_default_bounds]
		type ExistentialDeposit: Get<Self::Balance>;

		/// The means of storing the balances of an account.
		#[pallet::no_default]
		type AccountStore: StoredMap<Self::AccountId, AccountData<Self::Balance>>;

		/// The ID type for reserves.
		///
		/// Use of reserves is deprecated in favour of holds. See `https://github.com/paritytech/substrate/pull/12951/`
		type ReserveIdentifier: Parameter + Member + MaxEncodedLen + Ord + Copy;

		/// The ID type for freezes.
		type FreezeIdentifier: Parameter + Member + MaxEncodedLen + Copy;

		/// The maximum number of locks that should exist on an account.
		/// Not strictly enforced, but used for weight estimation.
		#[pallet::constant]
		type MaxLocks: Get<u32>;

		/// The maximum number of named reserves that can exist on an account.
		#[pallet::constant]
		type MaxReserves: Get<u32>;

		/// The maximum number of individual freeze locks that can exist on an account at any time.
		#[pallet::constant]
		type MaxFreezes: Get<u32>;
	}

	/// The current storage version.
	const STORAGE_VERSION: frame_support::traits::StorageVersion =
		frame_support::traits::StorageVersion::new(1);

	#[pallet::pallet]
	#[pallet::storage_version(STORAGE_VERSION)]
	pub struct Pallet<T, I = ()>(PhantomData<(T, I)>);

	#[pallet::event]
	#[pallet::generate_deposit(pub(super) fn deposit_event)]
	pub enum Event<T: Config<I>, I: 'static = ()> {
		/// An account was created with some free balance.
		Endowed { account: T::AccountId, free_balance: T::Balance },
		/// An account was removed whose balance was non-zero but below ExistentialDeposit,
		/// resulting in an outright loss.
		DustLost { account: T::AccountId, amount: T::Balance },
		/// Transfer succeeded.
		Transfer { from: T::AccountId, to: T::AccountId, amount: T::Balance },
		/// A balance was set by root.
		BalanceSet { who: T::AccountId, free: T::Balance },
		/// Some balance was reserved (moved from free to reserved).
		Reserved { who: T::AccountId, amount: T::Balance },
		/// Some balance was unreserved (moved from reserved to free).
		Unreserved { who: T::AccountId, amount: T::Balance },
		/// Some balance was moved from the reserve of the first account to the second account.
		/// Final argument indicates the destination balance type.
		ReserveRepatriated {
			from: T::AccountId,
			to: T::AccountId,
			amount: T::Balance,
			destination_status: Status,
		},
		/// Some amount was deposited (e.g. for transaction fees).
		Deposit { who: T::AccountId, amount: T::Balance },
		/// Some amount was withdrawn from the account (e.g. for transaction fees).
		Withdraw { who: T::AccountId, amount: T::Balance },
		/// Some amount was removed from the account (e.g. for misbehavior).
		Slashed { who: T::AccountId, amount: T::Balance },
		/// Some amount was minted into an account.
		Minted { who: T::AccountId, amount: T::Balance },
		/// Some amount was burned from an account.
		Burned { who: T::AccountId, amount: T::Balance },
		/// Some amount was suspended from an account (it can be restored later).
		Suspended { who: T::AccountId, amount: T::Balance },
		/// Some amount was restored into an account.
		Restored { who: T::AccountId, amount: T::Balance },
		/// An account was upgraded.
		Upgraded { who: T::AccountId },
		/// Total issuance was increased by `amount`, creating a credit to be balanced.
		Issued { amount: T::Balance },
		/// Total issuance was decreased by `amount`, creating a debt to be balanced.
		Rescinded { amount: T::Balance },
		/// Some balance was locked.
		Locked { who: T::AccountId, amount: T::Balance },
		/// Some balance was unlocked.
		Unlocked { who: T::AccountId, amount: T::Balance },
		/// Some balance was frozen.
		Frozen { who: T::AccountId, amount: T::Balance },
		/// Some balance was thawed.
		Thawed { who: T::AccountId, amount: T::Balance },
		/// The `TotalIssuance` was forcefully changed.
		TotalIssuanceForced { old: T::Balance, new: T::Balance },
	}

	#[pallet::error]
	pub enum Error<T, I = ()> {
		/// Vesting balance too high to send value.
		VestingBalance,
		/// Account liquidity restrictions prevent withdrawal.
		LiquidityRestrictions,
		/// Balance too low to send value.
		InsufficientBalance,
		/// Value too low to create account due to existential deposit.
		ExistentialDeposit,
		/// Transfer/payment would kill account.
		Expendability,
		/// A vesting schedule already exists for this account.
		ExistingVestingSchedule,
		/// Beneficiary account must pre-exist.
		DeadAccount,
		/// Number of named reserves exceed `MaxReserves`.
		TooManyReserves,
		/// Number of holds exceed `VariantCountOf<T::RuntimeHoldReason>`.
		TooManyHolds,
		/// Number of freezes exceed `MaxFreezes`.
		TooManyFreezes,
		/// The issuance cannot be modified since it is already deactivated.
		IssuanceDeactivated,
		/// The delta cannot be zero.
		DeltaZero,
	}

	/// The total units issued in the system.
	#[pallet::storage]
	#[pallet::getter(fn total_issuance)]
	#[pallet::whitelist_storage]
	pub type TotalIssuance<T: Config<I>, I: 'static = ()> = StorageValue<_, T::Balance, ValueQuery>;

	/// The total units of outstanding deactivated balance in the system.
	#[pallet::storage]
	#[pallet::getter(fn inactive_issuance)]
	#[pallet::whitelist_storage]
	pub type InactiveIssuance<T: Config<I>, I: 'static = ()> =
		StorageValue<_, T::Balance, ValueQuery>;

	/// The Balances pallet example of storing the balance of an account.
	///
	/// # Example
	///
	/// ```nocompile
	///  impl pallet_balances::Config for Runtime {
	///    type AccountStore = StorageMapShim<Self::Account<Runtime>, frame_system::Provider<Runtime>, AccountId, Self::AccountData<Balance>>
	///  }
	/// ```
	///
	/// You can also store the balance of an account in the `System` pallet.
	///
	/// # Example
	///
	/// ```nocompile
	///  impl pallet_balances::Config for Runtime {
	///   type AccountStore = System
	///  }
	/// ```
	///
	/// But this comes with tradeoffs, storing account balances in the system pallet stores
	/// `frame_system` data alongside the account data contrary to storing account balances in the
	/// `Balances` pallet, which uses a `StorageMap` to store balances data only.
	/// NOTE: This is only used in the case that this pallet is used to store balances.
	#[pallet::storage]
	pub type Account<T: Config<I>, I: 'static = ()> =
		StorageMap<_, Blake2_128Concat, T::AccountId, AccountData<T::Balance>, ValueQuery>;

	/// Any liquidity locks on some account balances.
	/// NOTE: Should only be accessed when setting, changing and freeing a lock.
	#[pallet::storage]
	#[pallet::getter(fn locks)]
	pub type Locks<T: Config<I>, I: 'static = ()> = StorageMap<
		_,
		Blake2_128Concat,
		T::AccountId,
		WeakBoundedVec<BalanceLock<T::Balance>, T::MaxLocks>,
		ValueQuery,
	>;

	/// Named reserves on some account balances.
	#[pallet::storage]
	#[pallet::getter(fn reserves)]
	pub type Reserves<T: Config<I>, I: 'static = ()> = StorageMap<
		_,
		Blake2_128Concat,
		T::AccountId,
		BoundedVec<ReserveData<T::ReserveIdentifier, T::Balance>, T::MaxReserves>,
		ValueQuery,
	>;

	/// Holds on account balances.
	#[pallet::storage]
	pub type Holds<T: Config<I>, I: 'static = ()> = StorageMap<
		_,
		Blake2_128Concat,
		T::AccountId,
		BoundedVec<
			IdAmount<T::RuntimeHoldReason, T::Balance>,
			VariantCountOf<T::RuntimeHoldReason>,
		>,
		ValueQuery,
	>;

	/// Freeze locks on account balances.
	#[pallet::storage]
	pub type Freezes<T: Config<I>, I: 'static = ()> = StorageMap<
		_,
		Blake2_128Concat,
		T::AccountId,
		BoundedVec<IdAmount<T::FreezeIdentifier, T::Balance>, T::MaxFreezes>,
		ValueQuery,
	>;

	#[pallet::genesis_config]
	pub struct GenesisConfig<T: Config<I>, I: 'static = ()> {
		pub balances: Vec<(T::AccountId, T::Balance)>,
	}

	impl<T: Config<I>, I: 'static> Default for GenesisConfig<T, I> {
		fn default() -> Self {
			Self { balances: Default::default() }
		}
	}

	#[pallet::genesis_build]
	impl<T: Config<I>, I: 'static> BuildGenesisConfig for GenesisConfig<T, I> {
		fn build(&self) {
			let total = self.balances.iter().fold(Zero::zero(), |acc: T::Balance, &(_, n)| acc + n);

			<TotalIssuance<T, I>>::put(total);

			for (_, balance) in &self.balances {
				assert!(
					*balance >= <T as Config<I>>::ExistentialDeposit::get(),
					"the balance of any account should always be at least the existential deposit.",
				)
			}

			// ensure no duplicates exist.
			let endowed_accounts = self
				.balances
				.iter()
				.map(|(x, _)| x)
				.cloned()
				.collect::<sp_std::collections::btree_set::BTreeSet<_>>();

			assert!(
				endowed_accounts.len() == self.balances.len(),
				"duplicate balances in genesis."
			);

			for &(ref who, free) in self.balances.iter() {
				frame_system::Pallet::<T>::inc_providers(who);
				assert!(T::AccountStore::insert(who, AccountData { free, ..Default::default() })
					.is_ok());
			}
		}
	}

	#[pallet::hooks]
	impl<T: Config<I>, I: 'static> Hooks<BlockNumberFor<T>> for Pallet<T, I> {
		#[cfg(not(feature = "insecure_zero_ed"))]
		fn integrity_test() {
			assert!(
				!<T as Config<I>>::ExistentialDeposit::get().is_zero(),
				"The existential deposit must be greater than zero!"
			);

			assert!(
				T::MaxFreezes::get() >= <T::RuntimeFreezeReason as VariantCount>::VARIANT_COUNT,
				"MaxFreezes should be greater than or equal to the number of freeze reasons: {} < {}",
				T::MaxFreezes::get(), <T::RuntimeFreezeReason as VariantCount>::VARIANT_COUNT,
			);
		}
	}

	#[pallet::call(weight(<T as Config<I>>::WeightInfo))]
	impl<T: Config<I>, I: 'static> Pallet<T, I> {
		/// Transfer some liquid free balance to another account.
		///
		/// `transfer_allow_death` will set the `FreeBalance` of the sender and receiver.
		/// If the sender's account is below the existential deposit as a result
		/// of the transfer, the account will be reaped.
		///
		/// The dispatch origin for this call must be `Signed` by the transactor.
		#[pallet::call_index(0)]
		pub fn transfer_allow_death(
			origin: OriginFor<T>,
			dest: AccountIdLookupOf<T>,
			#[pallet::compact] value: T::Balance,
		) -> DispatchResult {
			let source = ensure_signed(origin)?;
			let dest = T::Lookup::lookup(dest)?;
			<Self as fungible::Mutate<_>>::transfer(&source, &dest, value, Expendable)?;
			Ok(())
		}

		/// Exactly as `transfer_allow_death`, except the origin must be root and the source account
		/// may be specified.
		#[pallet::call_index(2)]
		pub fn force_transfer(
			origin: OriginFor<T>,
			source: AccountIdLookupOf<T>,
			dest: AccountIdLookupOf<T>,
			#[pallet::compact] value: T::Balance,
		) -> DispatchResult {
			ensure_root(origin)?;
			let source = T::Lookup::lookup(source)?;
			let dest = T::Lookup::lookup(dest)?;
			<Self as fungible::Mutate<_>>::transfer(&source, &dest, value, Expendable)?;
			Ok(())
		}

		/// Same as the [`transfer_allow_death`] call, but with a check that the transfer will not
		/// kill the origin account.
		///
		/// 99% of the time you want [`transfer_allow_death`] instead.
		///
		/// [`transfer_allow_death`]: struct.Pallet.html#method.transfer
		#[pallet::call_index(3)]
		pub fn transfer_keep_alive(
			origin: OriginFor<T>,
			dest: AccountIdLookupOf<T>,
			#[pallet::compact] value: T::Balance,
		) -> DispatchResult {
			let source = ensure_signed(origin)?;
			let dest = T::Lookup::lookup(dest)?;
			<Self as fungible::Mutate<_>>::transfer(&source, &dest, value, Preserve)?;
			Ok(())
		}

		/// Transfer the entire transferable balance from the caller account.
		///
		/// NOTE: This function only attempts to transfer _transferable_ balances. This means that
		/// any locked, reserved, or existential deposits (when `keep_alive` is `true`), will not be
		/// transferred by this function. To ensure that this function results in a killed account,
		/// you might need to prepare the account by removing any reference counters, storage
		/// deposits, etc...
		///
		/// The dispatch origin of this call must be Signed.
		///
		/// - `dest`: The recipient of the transfer.
		/// - `keep_alive`: A boolean to determine if the `transfer_all` operation should send all
		///   of the funds the account has, causing the sender account to be killed (false), or
		///   transfer everything except at least the existential deposit, which will guarantee to
		///   keep the sender account alive (true).
		#[pallet::call_index(4)]
		pub fn transfer_all(
			origin: OriginFor<T>,
			dest: AccountIdLookupOf<T>,
			keep_alive: bool,
		) -> DispatchResult {
			let transactor = ensure_signed(origin)?;
			let keep_alive = if keep_alive { Preserve } else { Expendable };
			let reducible_balance = <Self as fungible::Inspect<_>>::reducible_balance(
				&transactor,
				keep_alive,
				Fortitude::Polite,
			);
			let dest = T::Lookup::lookup(dest)?;
			<Self as fungible::Mutate<_>>::transfer(
				&transactor,
				&dest,
				reducible_balance,
				keep_alive,
			)?;
			Ok(())
		}

		/// Unreserve some balance from a user by force.
		///
		/// Can only be called by ROOT.
		#[pallet::call_index(5)]
		pub fn force_unreserve(
			origin: OriginFor<T>,
			who: AccountIdLookupOf<T>,
			amount: T::Balance,
		) -> DispatchResult {
			ensure_root(origin)?;
			let who = T::Lookup::lookup(who)?;
			let _leftover = <Self as ReservableCurrency<_>>::unreserve(&who, amount);
			Ok(())
		}

		/// Upgrade a specified account.
		///
		/// - `origin`: Must be `Signed`.
		/// - `who`: The account to be upgraded.
		///
		/// This will waive the transaction fee if at least all but 10% of the accounts needed to
		/// be upgraded. (We let some not have to be upgraded just in order to allow for the
		/// possibililty of churn).
		#[pallet::call_index(6)]
		#[pallet::weight(T::WeightInfo::upgrade_accounts(who.len() as u32))]
		pub fn upgrade_accounts(
			origin: OriginFor<T>,
			who: Vec<T::AccountId>,
		) -> DispatchResultWithPostInfo {
			ensure_signed(origin)?;
			if who.is_empty() {
				return Ok(Pays::Yes.into())
			}
			let mut upgrade_count = 0;
			for i in &who {
				let upgraded = Self::ensure_upgraded(i);
				if upgraded {
					upgrade_count.saturating_inc();
				}
			}
			let proportion_upgraded = Perbill::from_rational(upgrade_count, who.len() as u32);
			if proportion_upgraded >= Perbill::from_percent(90) {
				Ok(Pays::No.into())
			} else {
				Ok(Pays::Yes.into())
			}
		}

		/// Set the regular balance of a given account.
		///
		/// The dispatch origin for this call is `root`.
		#[pallet::call_index(8)]
		#[pallet::weight(
			T::WeightInfo::force_set_balance_creating() // Creates a new account.
				.max(T::WeightInfo::force_set_balance_killing()) // Kills an existing account.
		)]
		pub fn force_set_balance(
			origin: OriginFor<T>,
			who: AccountIdLookupOf<T>,
			#[pallet::compact] new_free: T::Balance,
		) -> DispatchResult {
			ensure_root(origin)?;
			let who = T::Lookup::lookup(who)?;
			let existential_deposit = Self::ed();

			let wipeout = new_free < existential_deposit;
			let new_free = if wipeout { Zero::zero() } else { new_free };

			// First we try to modify the account's balance to the forced balance.
			let old_free = Self::mutate_account_handling_dust(&who, |account| {
				let old_free = account.free;
				account.free = new_free;
				old_free
			})?;

			// This will adjust the total issuance, which was not done by the `mutate_account`
			// above.
			if new_free > old_free {
				mem::drop(PositiveImbalance::<T, I>::new(new_free - old_free));
			} else if new_free < old_free {
				mem::drop(NegativeImbalance::<T, I>::new(old_free - new_free));
			}

			Self::deposit_event(Event::BalanceSet { who, free: new_free });
			Ok(())
		}

		/// Adjust the total issuance in a saturating way.
		///
		/// Can only be called by root and always needs a positive `delta`.
		///
		/// # Example
		#[doc = docify::embed!("./src/tests/dispatchable_tests.rs", force_adjust_total_issuance_example)]
		#[pallet::call_index(9)]
		#[pallet::weight(T::WeightInfo::force_adjust_total_issuance())]
		pub fn force_adjust_total_issuance(
			origin: OriginFor<T>,
			direction: AdjustmentDirection,
			#[pallet::compact] delta: T::Balance,
		) -> DispatchResult {
			ensure_root(origin)?;

			ensure!(delta > Zero::zero(), Error::<T, I>::DeltaZero);

			let old = TotalIssuance::<T, I>::get();
			let new = match direction {
				AdjustmentDirection::Increase => old.saturating_add(delta),
				AdjustmentDirection::Decrease => old.saturating_sub(delta),
			};

			ensure!(InactiveIssuance::<T, I>::get() <= new, Error::<T, I>::IssuanceDeactivated);
			TotalIssuance::<T, I>::set(new);

			Self::deposit_event(Event::<T, I>::TotalIssuanceForced { old, new });

			Ok(())
		}
	}

	impl<T: Config<I>, I: 'static> Pallet<T, I> {
		fn ed() -> T::Balance {
			T::ExistentialDeposit::get()
		}
		/// Ensure the account `who` is using the new logic.
		///
		/// Returns `true` if the account did get upgraded, `false` if it didn't need upgrading.
		pub fn ensure_upgraded(who: &T::AccountId) -> bool {
			let mut a = T::AccountStore::get(who);
			if a.flags.is_new_logic() {
				return false
			}
			a.flags.set_new_logic();
			if !a.reserved.is_zero() && a.frozen.is_zero() {
				if system::Pallet::<T>::providers(who) == 0 {
					// Gah!! We have no provider refs :(
					// This shouldn't practically happen, but we need a failsafe anyway: let's give
					// them enough for an ED.
					log::warn!(
						target: LOG_TARGET,
						"account with a non-zero reserve balance has no provider refs, account_id: '{:?}'.",
						who
					);
					a.free = a.free.max(Self::ed());
					system::Pallet::<T>::inc_providers(who);
				}
				let _ = system::Pallet::<T>::inc_consumers_without_limit(who).defensive();
			}
			// Should never fail - we're only setting a bit.
			let _ = T::AccountStore::try_mutate_exists(who, |account| -> DispatchResult {
				*account = Some(a);
				Ok(())
			});
			Self::deposit_event(Event::Upgraded { who: who.clone() });
			return true
		}

		/// Get the free balance of an account.
		pub fn free_balance(who: impl sp_std::borrow::Borrow<T::AccountId>) -> T::Balance {
			Self::account(who.borrow()).free
		}

		/// Get the balance of an account that can be used for transfers, reservations, or any other
		/// non-locking, non-transaction-fee activity. Will be at most `free_balance`.
		pub fn usable_balance(who: impl sp_std::borrow::Borrow<T::AccountId>) -> T::Balance {
			<Self as fungible::Inspect<_>>::reducible_balance(who.borrow(), Expendable, Polite)
		}

		/// Get the balance of an account that can be used for paying transaction fees (not tipping,
		/// or any other kind of fees, though). Will be at most `free_balance`.
		///
		/// This requires that the account stays alive.
		pub fn usable_balance_for_fees(
			who: impl sp_std::borrow::Borrow<T::AccountId>,
		) -> T::Balance {
			<Self as fungible::Inspect<_>>::reducible_balance(who.borrow(), Protect, Polite)
		}

		/// Get the reserved balance of an account.
		pub fn reserved_balance(who: impl sp_std::borrow::Borrow<T::AccountId>) -> T::Balance {
			Self::account(who.borrow()).reserved
		}

		/// Get both the free and reserved balances of an account.
		pub(crate) fn account(who: &T::AccountId) -> AccountData<T::Balance> {
			T::AccountStore::get(who)
		}

		/// Mutate an account to some new value, or delete it entirely with `None`. Will enforce
		/// `ExistentialDeposit` law, annulling the account as needed.
		///
		/// It returns the result from the closure. Any dust is handled through the low-level
		/// `fungible::Unbalanced` trap-door for legacy dust management.
		///
		/// NOTE: Doesn't do any preparatory work for creating a new account, so should only be used
		/// when it is known that the account already exists.
		///
		/// NOTE: LOW-LEVEL: This will not attempt to maintain total issuance. It is expected that
		/// the caller will do this.
		pub(crate) fn mutate_account_handling_dust<R>(
			who: &T::AccountId,
			f: impl FnOnce(&mut AccountData<T::Balance>) -> R,
		) -> Result<R, DispatchError> {
			let (r, maybe_dust) = Self::mutate_account(who, f)?;
			if let Some(dust) = maybe_dust {
				<Self as fungible::Unbalanced<_>>::handle_raw_dust(dust);
			}
			Ok(r)
		}

		/// Mutate an account to some new value, or delete it entirely with `None`. Will enforce
		/// `ExistentialDeposit` law, annulling the account as needed.
		///
		/// It returns the result from the closure. Any dust is handled through the low-level
		/// `fungible::Unbalanced` trap-door for legacy dust management.
		///
		/// NOTE: Doesn't do any preparatory work for creating a new account, so should only be used
		/// when it is known that the account already exists.
		///
		/// NOTE: LOW-LEVEL: This will not attempt to maintain total issuance. It is expected that
		/// the caller will do this.
		pub(crate) fn try_mutate_account_handling_dust<R, E: From<DispatchError>>(
			who: &T::AccountId,
			f: impl FnOnce(&mut AccountData<T::Balance>, bool) -> Result<R, E>,
		) -> Result<R, E> {
			let (r, maybe_dust) = Self::try_mutate_account(who, f)?;
			if let Some(dust) = maybe_dust {
				<Self as fungible::Unbalanced<_>>::handle_raw_dust(dust);
			}
			Ok(r)
		}

		/// Mutate an account to some new value, or delete it entirely with `None`. Will enforce
		/// `ExistentialDeposit` law, annulling the account as needed.
		///
		/// It returns both the result from the closure, and an optional amount of dust
		/// which should be handled once it is known that all nested mutates that could affect
		/// storage items what the dust handler touches have completed.
		///
		/// NOTE: Doesn't do any preparatory work for creating a new account, so should only be used
		/// when it is known that the account already exists.
		///
		/// NOTE: LOW-LEVEL: This will not attempt to maintain total issuance. It is expected that
		/// the caller will do this.
		pub(crate) fn mutate_account<R>(
			who: &T::AccountId,
			f: impl FnOnce(&mut AccountData<T::Balance>) -> R,
		) -> Result<(R, Option<T::Balance>), DispatchError> {
			Self::try_mutate_account(who, |a, _| -> Result<R, DispatchError> { Ok(f(a)) })
		}

		/// Returns `true` when `who` has some providers or `insecure_zero_ed` feature is disnabled.
		/// Returns `false` otherwise.
		#[cfg(not(feature = "insecure_zero_ed"))]
		fn have_providers_or_no_zero_ed(_: &T::AccountId) -> bool {
			true
		}

		/// Returns `true` when `who` has some providers or `insecure_zero_ed` feature is disnabled.
		/// Returns `false` otherwise.
		#[cfg(feature = "insecure_zero_ed")]
		fn have_providers_or_no_zero_ed(who: &T::AccountId) -> bool {
			frame_system::Pallet::<T>::providers(who) > 0
		}

		/// Mutate an account to some new value, or delete it entirely with `None`. Will enforce
		/// `ExistentialDeposit` law, annulling the account as needed. This will do nothing if the
		/// result of `f` is an `Err`.
		///
		/// It returns both the result from the closure, and an optional amount of dust
		/// which should be handled once it is known that all nested mutates that could affect
		/// storage items what the dust handler touches have completed.
		///
		/// NOTE: Doesn't do any preparatory work for creating a new account, so should only be used
		/// when it is known that the account already exists.
		///
		/// NOTE: LOW-LEVEL: This will not attempt to maintain total issuance. It is expected that
		/// the caller will do this.
		pub(crate) fn try_mutate_account<R, E: From<DispatchError>>(
			who: &T::AccountId,
			f: impl FnOnce(&mut AccountData<T::Balance>, bool) -> Result<R, E>,
		) -> Result<(R, Option<T::Balance>), E> {
			Self::ensure_upgraded(who);
			let result = T::AccountStore::try_mutate_exists(who, |maybe_account| {
				let is_new = maybe_account.is_none();
				let mut account = maybe_account.take().unwrap_or_default();
				let did_provide =
					account.free >= Self::ed() && Self::have_providers_or_no_zero_ed(who);
				let did_consume =
					!is_new && (!account.reserved.is_zero() || !account.frozen.is_zero());

				let result = f(&mut account, is_new)?;

				let does_provide = account.free >= Self::ed();
				let does_consume = !account.reserved.is_zero() || !account.frozen.is_zero();

				if !did_provide && does_provide {
					frame_system::Pallet::<T>::inc_providers(who);
				}
				if did_consume && !does_consume {
					frame_system::Pallet::<T>::dec_consumers(who);
				}
				if !did_consume && does_consume {
					frame_system::Pallet::<T>::inc_consumers(who)?;
				}
				if did_provide && !does_provide {
					// This could reap the account so must go last.
					frame_system::Pallet::<T>::dec_providers(who).map_err(|r| {
						// best-effort revert consumer change.
						if did_consume && !does_consume {
							let _ = frame_system::Pallet::<T>::inc_consumers(who).defensive();
						}
						if !did_consume && does_consume {
							let _ = frame_system::Pallet::<T>::dec_consumers(who);
						}
						r
					})?;
				}

				let maybe_endowed = if is_new { Some(account.free) } else { None };

				// Handle any steps needed after mutating an account.
				//
				// This includes DustRemoval unbalancing, in the case than the `new` account's total
				// balance is non-zero but below ED.
				//
				// Updates `maybe_account` to `Some` iff the account has sufficient balance.
				// Evaluates `maybe_dust`, which is `Some` containing the dust to be dropped, iff
				// some dust should be dropped.
				//
				// We should never be dropping if reserved is non-zero. Reserved being non-zero
				// should imply that we have a consumer ref, so this is economically safe.
				let ed = Self::ed();
				let maybe_dust = if account.free < ed && account.reserved.is_zero() {
					if account.free.is_zero() {
						None
					} else {
						Some(account.free)
					}
				} else {
					assert!(
						account.free.is_zero() || account.free >= ed || !account.reserved.is_zero()
					);
					*maybe_account = Some(account);
					None
				};
				Ok((maybe_endowed, maybe_dust, result))
			});
			result.map(|(maybe_endowed, maybe_dust, result)| {
				if let Some(endowed) = maybe_endowed {
					Self::deposit_event(Event::Endowed {
						account: who.clone(),
						free_balance: endowed,
					});
				}
				if let Some(amount) = maybe_dust {
					Pallet::<T, I>::deposit_event(Event::DustLost { account: who.clone(), amount });
				}
				(result, maybe_dust)
			})
		}

		/// Update the account entry for `who`, given the locks.
		pub(crate) fn update_locks(who: &T::AccountId, locks: &[BalanceLock<T::Balance>]) {
			let bounded_locks = WeakBoundedVec::<_, T::MaxLocks>::force_from(
				locks.to_vec(),
				Some("Balances Update Locks"),
			);

			if locks.len() as u32 > T::MaxLocks::get() {
				log::warn!(
					target: LOG_TARGET,
					"Warning: A user has more currency locks than expected. \
					A runtime configuration adjustment may be needed."
				);
			}
			let freezes = Freezes::<T, I>::get(who);
			let mut prev_frozen = Zero::zero();
			let mut after_frozen = Zero::zero();
			// No way this can fail since we do not alter the existential balances.
			// TODO: Revisit this assumption.
			let res = Self::mutate_account(who, |b| {
				prev_frozen = b.frozen;
				b.frozen = Zero::zero();
				for l in locks.iter() {
					b.frozen = b.frozen.max(l.amount);
				}
				for l in freezes.iter() {
					b.frozen = b.frozen.max(l.amount);
				}
				after_frozen = b.frozen;
			});
			debug_assert!(res.is_ok());
			if let Ok((_, maybe_dust)) = res {
				debug_assert!(maybe_dust.is_none(), "Not altering main balance; qed");
			}

			match locks.is_empty() {
				true => Locks::<T, I>::remove(who),
				false => Locks::<T, I>::insert(who, bounded_locks),
			}

			if prev_frozen > after_frozen {
				let amount = prev_frozen.saturating_sub(after_frozen);
				Self::deposit_event(Event::Unlocked { who: who.clone(), amount });
			} else if after_frozen > prev_frozen {
				let amount = after_frozen.saturating_sub(prev_frozen);
				Self::deposit_event(Event::Locked { who: who.clone(), amount });
			}
		}

		/// Update the account entry for `who`, given the locks.
		pub(crate) fn update_freezes(
			who: &T::AccountId,
			freezes: BoundedSlice<IdAmount<T::FreezeIdentifier, T::Balance>, T::MaxFreezes>,
		) -> DispatchResult {
			let mut prev_frozen = Zero::zero();
			let mut after_frozen = Zero::zero();
			let (_, maybe_dust) = Self::mutate_account(who, |b| {
				prev_frozen = b.frozen;
				b.frozen = Zero::zero();
				for l in Locks::<T, I>::get(who).iter() {
					b.frozen = b.frozen.max(l.amount);
				}
				for l in freezes.iter() {
					b.frozen = b.frozen.max(l.amount);
				}
				after_frozen = b.frozen;
			})?;
			debug_assert!(maybe_dust.is_none(), "Not altering main balance; qed");
			if freezes.is_empty() {
				Freezes::<T, I>::remove(who);
			} else {
				Freezes::<T, I>::insert(who, freezes);
			}
			if prev_frozen > after_frozen {
				let amount = prev_frozen.saturating_sub(after_frozen);
				Self::deposit_event(Event::Thawed { who: who.clone(), amount });
			} else if after_frozen > prev_frozen {
				let amount = after_frozen.saturating_sub(prev_frozen);
				Self::deposit_event(Event::Frozen { who: who.clone(), amount });
			}
			Ok(())
		}

		/// Move the reserved balance of one account into the balance of another, according to
		/// `status`. This will respect freezes/locks only if `fortitude` is `Polite`.
		///
		/// Is a no-op if the value to be moved is zero.
		///
		/// NOTE: returns actual amount of transferred value in `Ok` case.
		pub(crate) fn do_transfer_reserved(
			slashed: &T::AccountId,
			beneficiary: &T::AccountId,
			value: T::Balance,
			precision: Precision,
			fortitude: Fortitude,
			status: Status,
		) -> Result<T::Balance, DispatchError> {
			if value.is_zero() {
				return Ok(Zero::zero())
			}

			let max = <Self as fungible::InspectHold<_>>::reducible_total_balance_on_hold(
				slashed, fortitude,
			);
			let actual = match precision {
				Precision::BestEffort => value.min(max),
				Precision::Exact => value,
			};
			ensure!(actual <= max, TokenError::FundsUnavailable);
			if slashed == beneficiary {
				return match status {
					Status::Free => Ok(actual.saturating_sub(Self::unreserve(slashed, actual))),
					Status::Reserved => Ok(actual),
				}
			}

			let ((_, maybe_dust_1), maybe_dust_2) = Self::try_mutate_account(
				beneficiary,
				|to_account, is_new| -> Result<((), Option<T::Balance>), DispatchError> {
					ensure!(!is_new, Error::<T, I>::DeadAccount);
					Self::try_mutate_account(slashed, |from_account, _| -> DispatchResult {
						match status {
							Status::Free =>
								to_account.free = to_account
									.free
									.checked_add(&actual)
									.ok_or(ArithmeticError::Overflow)?,
							Status::Reserved =>
								to_account.reserved = to_account
									.reserved
									.checked_add(&actual)
									.ok_or(ArithmeticError::Overflow)?,
						}
						from_account.reserved.saturating_reduce(actual);
						Ok(())
					})
				},
			)?;

			if let Some(dust) = maybe_dust_1 {
				<Self as fungible::Unbalanced<_>>::handle_raw_dust(dust);
			}
			if let Some(dust) = maybe_dust_2 {
				<Self as fungible::Unbalanced<_>>::handle_raw_dust(dust);
			}

			Self::deposit_event(Event::ReserveRepatriated {
				from: slashed.clone(),
				to: beneficiary.clone(),
				amount: actual,
				destination_status: status,
			});
			Ok(actual)
		}
	}
}