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UnionOf types for merged fungible and fungibles implementations (#2033)

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Introduces `UnionOf` types, crafted to merge `fungible` and `fungibles`
implementations or two `fungibles` implementations into a single type
implementing `fungibles`.

This also addresses an issue where `ItemOf` initiates a double drop for
an imbalance type, leading to inaccurate total issuance accounting.

Find the application of these types in this PR -
[link](https://github.com/paritytech/polkadot-sdk/pull/2031), places in
code -
[1](https://github.com/paritytech/polkadot-sdk/blob/4ec7496fa2632385b08fae860fcf28a523a7b5de/cumulus/parachains/runtimes/assets/asset-hub-kusama/src/lib.rs#L327),
[2](https://github.com/paritytech/polkadot-sdk/blob/4ec7496fa2632385b08fae860fcf28a523a7b5de/cumulus/parachains/runtimes/assets/asset-hub-kusama/src/lib.rs#L343).

---------

Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: joepetrowski <joe@parity.io>
This commit is contained in:
Muharem
2023-12-19 13:51:05 +01:00
committed by GitHub
parent 81156d03ce
commit 0b74812ce8
15 changed files with 2353 additions and 37 deletions
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substrate/frame/balances/src/impl_fungible.rs
+20 -4
View File
@@ -17,10 +17,13 @@
//! Implementation of `fungible` traits for Balances pallet.
use super::*;
use frame_support::traits::tokens::{
Fortitude,
Preservation::{self, Preserve, Protect},
Provenance::{self, Minted},
use frame_support::traits::{
tokens::{
Fortitude,
Preservation::{self, Preserve, Protect},
Provenance::{self, Minted},
},
AccountTouch,
};
impl<T: Config<I>, I: 'static> fungible::Inspect<T::AccountId> for Pallet<T, I> {
@@ -356,3 +359,16 @@ impl<T: Config<I>, I: 'static> fungible::Balanced<T::AccountId> for Pallet<T, I>
}
impl<T: Config<I>, I: 'static> fungible::BalancedHold<T::AccountId> for Pallet<T, I> {}
impl<T: Config<I>, I: 'static> AccountTouch<(), T::AccountId> for Pallet<T, I> {
type Balance = T::Balance;
fn deposit_required(_: ()) -> Self::Balance {
Self::Balance::zero()
}
fn should_touch(_: (), _: &T::AccountId) -> bool {
false
}
fn touch(_: (), _: &T::AccountId, _: &T::AccountId) -> DispatchResult {
Ok(())
}
}