Deprecate Currency; introduce holds and freezing into fungible traits (#12951)

* First reworking of fungibles API

* New API and docs

* More fungible::* API improvements

* New ref-counting logic for old API

* Missing files

* Fixes

* Use the new transfer logic

* Use fungibles for the dispatchables

* Use shelve/restore names

* Locking works with total balance.

* repotting and removal

* Separate Holds from Reserves

* Introduce freezes

* Missing files

* Tests for freezing

* Fix hold+freeze combo

* More tests

* Fee-free dispatchable for upgrading accounts

* Benchmarks and a few fixes

* Another test

* Docs and refactor to avoid blanket impls

* Repot

* Fit out ItemOf fully

* Add events to Balanced traits

* Introduced events into Hold traits

* Fix Assets pallet tests

* Assets benchmarks pass

* Missing files and fixes

* Fixes

* Fixes

* Benchmarks fixes

* Fix balance benchmarks

* Formatting

* Expose fungible sub modules

* Move NIS to fungible API

* Fix broken impl and add test

* Fix tests

* API for `transfer_and_hold`

* Use composite APIs

* Formatting

* Upgraded event

* Fixes

* Fixes

* Fixes

* Fixes

* Repot tests and some fixed

* Fix some bits

* Fix dust tests

* Rename `set_balance`

- `Balances::set_balance` becomes `Balances::force_set_balance`
- `Unbalanced::set_balance` becomes `Unbalances::write_balance`

* becomes

* Move dust handling to fungibles API

* Formatting

* Fixes and more refactoring

* Fixes

* Fixes

* Fixes

* Fixes

* Fixes

* Fixes

* Fixes

* Fixes

* Fixes

* Use reducible_balance for better correctness on fees

* Reducing hold to zero should remove entry.

* Add test

* Docs

* Update frame/support/src/traits/tokens/fungibles/hold.rs

Co-authored-by: Muharem Ismailov <ismailov.m.h@gmail.com>

* Update frame/support/src/traits/tokens/fungibles/regular.rs

Co-authored-by: Muharem Ismailov <ismailov.m.h@gmail.com>

* Update frame/support/src/traits/tokens/fungible/hold.rs

Co-authored-by: Muharem Ismailov <ismailov.m.h@gmail.com>

* Update frame/support/src/traits/tokens/fungible/regular.rs

Co-authored-by: Muharem Ismailov <ismailov.m.h@gmail.com>

* Docs

* Docs

* Docs

* Fix NIS benchmarks

* Doc comment

* Remove post_mutation

* Fix some tests

* Fix some grumbles

* Enumify bool args to fungible(s) functions

* Fix up assets and balances

* Formatting

* Fix contracts

* Fix tests & benchmarks build

* Typify minted boolean arg

* Typify on_hold boolean arg; renames

* Fix numerous tests

* Fix dependency issue

* Privatize dangerous API mutate_account

* Fix contracts (@alext - please check this commit)

* Remove println

* Fix tests for contracts

* Fix broken rename

* Fix broken rename

* Fix broken rename

* Docs

* Update frame/support/src/traits/tokens/fungible/hold.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* remove from_ref_time

* Update frame/executive/src/lib.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/executive/src/lib.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Reenable test

* Update frame/support/src/traits/tokens/fungibles/hold.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/fungible/hold.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/fungible/hold.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/fungible/hold.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/currency.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/lottery/src/tests.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/fungible/mod.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/fungible/regular.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/fungibles/freeze.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/fungible/regular.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/fungibles/hold.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/fungibles/hold.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Update frame/support/src/traits/tokens/fungibles/hold.rs

Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>

* Rename UnwantedRemoval to UnwantedAccountRemoval

* Docs

* Formatting

* Update frame/balances/src/lib.rs

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Update primitives/runtime/src/lib.rs

Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>

* handle_raw_dust oes nothing

* Formatting

* Fixes

* Grumble

* Fixes

* Add test

* Add test

* Tests for reducible_balance

* Fixes

* Fix Salary

* Fixes

* Disable broken test

* Disable nicely

* Fixes

* Fixes

* Fixes

* Rename some events

* Fix nomination pools breakage

* Add compatibility stub for transfer tx

* Reinstate a safely compatible version of Balances set_balance

* Fixes

* Grumble

* Update frame/nis/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* ".git/.scripts/commands/bench/bench.sh" pallet dev pallet_balances

* disable flakey tests

* Update frame/balances/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Grumbles

* Grumble

---------

Co-authored-by: Muharem Ismailov <ismailov.m.h@gmail.com>
Co-authored-by: Alexander Theißen <alex.theissen@me.com>
Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
Co-authored-by: command-bot <>

substrate/frame/conviction-voting/src/benchmarking.rs

@@ -23,7 +23,11 @@ use assert_matches::assert_matches;
 use frame_benchmarking::v1::{account, benchmarks_instance_pallet, whitelist_account};
 use frame_support::{
 	dispatch::RawOrigin,
-	traits::{fungible, Currency, Get},
+	traits::{
+		fungible,
+		tokens::{Fortitude::Polite, Preservation::Expendable},
+		Currency, Get,
+	},
 };
 use sp_runtime::traits::Bounded;
 use sp_std::collections::btree_map::BTreeMap;
@@ -257,13 +261,13 @@ benchmarks_instance_pallet! {
 			}
 		}
 
-		let orig_usable = <T::Currency as fungible::Inspect<T::AccountId>>::reducible_balance(&caller, false);
+		let orig_usable = <T::Currency as fungible::Inspect<T::AccountId>>::reducible_balance(&caller, Expendable, Polite);
 		let polls = &all_polls[&class];
 
 		// Vote big on the class with the most ongoing votes of them to bump the lock and make it
 		// hard to recompute when removed.
 		ConvictionVoting::<T, I>::vote(RawOrigin::Signed(caller.clone()).into(), polls[0], big_account_vote)?;
-		let now_usable = <T::Currency as fungible::Inspect<T::AccountId>>::reducible_balance(&caller, false);
+		let now_usable = <T::Currency as fungible::Inspect<T::AccountId>>::reducible_balance(&caller, Expendable, Polite);
 		assert_eq!(orig_usable - now_usable, 100u32.into());
 
 		// Remove the vote
@@ -272,7 +276,7 @@ benchmarks_instance_pallet! {
 		// We can now unlock on `class` from 200 to 100...
 	}: _(RawOrigin::Signed(caller.clone()), class, caller_lookup)
 	verify {
-		assert_eq!(orig_usable, <T::Currency as fungible::Inspect<T::AccountId>>::reducible_balance(&caller, false));
+		assert_eq!(orig_usable, <T::Currency as fungible::Inspect<T::AccountId>>::reducible_balance(&caller, Expendable, Polite));
 	}
 
 	impl_benchmark_test_suite!(