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[FRAME] Short-circuit fungible self transfer (#2118)

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Changes:
- Change the fungible(s) logic to treat a self-transfer as No-OP (as
long as all pre-checks pass).

Note that the self-transfer case will not emit an event since no state
was changed.

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
This commit is contained in:
Oliver Tale-Yazdi
2023-11-01 22:11:28 +01:00
committed by GitHub
parent 4f05f9a686
commit c66ae375e6
10 changed files with 89 additions and 23 deletions
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polkadot/xcm/xcm-builder/src/fungibles_adapter.rs
+4 -4
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@@ -34,7 +34,7 @@ impl<
Assets: fungibles::Mutate<AccountId>,
Matcher: MatchesFungibles<Assets::AssetId, Assets::Balance>,
AccountIdConverter: ConvertLocation<AccountId>,
AccountId: Clone, // can't get away without it since Currency is generic over it.
AccountId: Eq + Clone, /* can't get away without it since Currency is generic over it. */
> TransactAsset for FungiblesTransferAdapter<Assets, Matcher, AccountIdConverter, AccountId>
{
fn internal_transfer_asset(
@@ -150,7 +150,7 @@ impl<
Assets: fungibles::Mutate<AccountId>,
Matcher: MatchesFungibles<Assets::AssetId, Assets::Balance>,
AccountIdConverter: ConvertLocation<AccountId>,
AccountId: Clone, // can't get away without it since Currency is generic over it.
AccountId: Eq + Clone, /* can't get away without it since Currency is generic over it. */
CheckAsset: AssetChecking<Assets::AssetId>,
CheckingAccount: Get<AccountId>,
>
@@ -185,7 +185,7 @@ impl<
Assets: fungibles::Mutate<AccountId>,
Matcher: MatchesFungibles<Assets::AssetId, Assets::Balance>,
AccountIdConverter: ConvertLocation<AccountId>,
AccountId: Clone, // can't get away without it since Currency is generic over it.
AccountId: Eq + Clone, /* can't get away without it since Currency is generic over it. */
CheckAsset: AssetChecking<Assets::AssetId>,
CheckingAccount: Get<AccountId>,
> TransactAsset
@@ -325,7 +325,7 @@ impl<
Assets: fungibles::Mutate<AccountId>,
Matcher: MatchesFungibles<Assets::AssetId, Assets::Balance>,
AccountIdConverter: ConvertLocation<AccountId>,
AccountId: Clone, // can't get away without it since Currency is generic over it.
AccountId: Eq + Clone, /* can't get away without it since Currency is generic over it. */
CheckAsset: AssetChecking<Assets::AssetId>,
CheckingAccount: Get<AccountId>,
> TransactAsset