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Update currency adapter #1043

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Update currency adapter #1043

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2d9c6bb
avoid mint/burn
xlc Nov 7, 2025
00ed148
allow death
xlc Nov 7, 2025
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24 changes: 20 additions & 4 deletions xcm-support/src/currency_adapter.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,7 @@ pub struct MultiCurrencyAdapter<
CurrencyId,
CurrencyIdConvert,
DepositFailureHandler,
CheckingAccount,
>(
PhantomData<(
MultiCurrency,
Expand All @@ -121,6 +122,7 @@ pub struct MultiCurrencyAdapter<
CurrencyId,
CurrencyIdConvert,
DepositFailureHandler,
CheckingAccount,
)>,
);

Expand All @@ -133,6 +135,7 @@ impl<
CurrencyId: FullCodec + Eq + PartialEq + Copy + MaybeSerializeDeserialize + Debug,
CurrencyIdConvert: Convert<Asset, Option<CurrencyId>>,
DepositFailureHandler: OnDepositFail<CurrencyId, AccountId, MultiCurrency::Balance>,
CheckingAccount: Get<AccountId>,
> TransactAsset
for MultiCurrencyAdapter<
MultiCurrency,
Expand All @@ -143,6 +146,7 @@ impl<
CurrencyId,
CurrencyIdConvert,
DepositFailureHandler,
CheckingAccount,
>
{
fn deposit_asset(asset: &Asset, location: &Location, _context: Option<&XcmContext>) -> Result {
Expand All @@ -152,8 +156,14 @@ impl<
Match::matches_fungible(asset),
) {
// known asset
(Some(who), Some(currency_id), Some(amount)) => MultiCurrency::deposit(currency_id, &who, amount)
.or_else(|err| DepositFailureHandler::on_deposit_currency_fail(err, currency_id, &who, amount)),
(Some(who), Some(currency_id), Some(amount)) => MultiCurrency::transfer(
currency_id,
&CheckingAccount::get(),
&who,
amount,
ExistenceRequirement::AllowDeath,
)
.or_else(|err| DepositFailureHandler::on_deposit_currency_fail(err, currency_id, &who, amount)),
// unknown asset
_ => UnknownAsset::deposit(asset, location)
.or_else(|err| DepositFailureHandler::on_deposit_unknown_asset_fail(err, asset, location)),
Expand All @@ -173,8 +183,14 @@ impl<
let amount: MultiCurrency::Balance = Match::matches_fungible(asset)
.ok_or_else(|| XcmError::from(Error::FailedToMatchFungible))?
.saturated_into();
MultiCurrency::withdraw(currency_id, &who, amount, ExistenceRequirement::AllowDeath)
.map_err(|e| XcmError::FailedToTransactAsset(e.into()))
MultiCurrency::transfer(
currency_id,
&who,
&CheckingAccount::get(),
amount,
ExistenceRequirement::AllowDeath,
)
.map_err(|e| XcmError::FailedToTransactAsset(e.into()))
})?;

Ok(asset.clone().into())
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