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xcm-builder: PayOverXcm supports fallible convertors for asset kind and beneficiary conversion (#1572)

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`PayOverXcm` type accepts two converters to transform the `AssetKind`
and `Beneficiary` parameter types into recognized `xcm` types. In this
PR, we've modified the bounds for these converters, transitioning from
`Convert` to `TryConvert`.

One such use case for this adjustment is when dealing with versioned xcm
types for `AssetKind` and `Beneficiary`. These types might be not
convertible to the latest xcm version, hence the need for fallible
conversion.

This changes required for
https://github.com/paritytech/polkadot-sdk/pull/1333
This commit is contained in:
Muharem Ismailov
2023-09-18 11:04:47 +02:00
committed by GitHub
parent e38998801e
commit a8e82a365e
3 changed files with 17 additions and 15 deletions
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polkadot/xcm/xcm-builder/src/location_conversion.rs
+4 -4
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@@ -18,7 +18,7 @@ use crate::universal_exports::ensure_is_remote;
use frame_support::traits::Get;
use parity_scale_codec::{Compact, Decode, Encode};
use sp_io::hashing::blake2_256;
use sp_runtime::traits::{AccountIdConversion, Convert, TrailingZeroInput};
use sp_runtime::traits::{AccountIdConversion, TrailingZeroInput, TryConvert};
use sp_std::{marker::PhantomData, prelude::*};
use xcm::latest::prelude::*;
use xcm_executor::traits::ConvertLocation;
@@ -322,10 +322,10 @@ impl<Network: Get<Option<NetworkId>>, AccountId: From<[u8; 32]> + Into<[u8; 32]>
/// network (provided by `Network`) and the `AccountId`'s `[u8; 32]` datum for the `id`.
pub struct AliasesIntoAccountId32<Network, AccountId>(PhantomData<(Network, AccountId)>);
impl<'a, Network: Get<Option<NetworkId>>, AccountId: Clone + Into<[u8; 32]> + Clone>
Convert<&'a AccountId, MultiLocation> for AliasesIntoAccountId32<Network, AccountId>
TryConvert<&'a AccountId, MultiLocation> for AliasesIntoAccountId32<Network, AccountId>
{
fn convert(who: &AccountId) -> MultiLocation {
AccountId32 { network: Network::get(), id: who.clone().into() }.into()
fn try_convert(who: &AccountId) -> Result<MultiLocation, &AccountId> {
Ok(AccountId32 { network: Network::get(), id: who.clone().into() }.into())
}
}