pub struct EnsureNotDerivativeInstance<Registry, Matcher>(/* private fields */);Expand description
The EnsureNotDerivativeInstance is an XCM Matcher that
ensures that the instance returned by the inner Matcher isn’t a derivative.
The check is performed using the DerivativesRegistry.
This Matcher is needed if derivative instances are created within the same NFT engine as this chain’s original instances, i.e. if addressing a derivative instance using the local XCM identification is possible.
For example, suppose this chain’s original instances (for which this chain is the reserve
location) can be addressed like this id: PalletInstance(111)/GeneralIndex(<ClassId>), fun: NonFungible(Index(<InClassInstanceId>)). So, this chain is the reserve location for all
instances matching the above identification.
However, if some of the instances within Pallet #111 could be derivatives as well, we need to ensure that this chain won’t act as the reserve location for these instances. If we allow this, this chain could send a derivative as if it were the original NFT on this chain. The other chain can’t know that this instance isn’t the original. We must prevent that so this chain will act as an honest reserve location.
Trait Implementations§
Source§impl<Registry: DerivativesRegistry<NonFungibleAsset, DerivativeId>, Matcher: MatchesInstance<DerivativeId>, DerivativeId> MatchesInstance<DerivativeId> for EnsureNotDerivativeInstance<Registry, Matcher>
impl<Registry: DerivativesRegistry<NonFungibleAsset, DerivativeId>, Matcher: MatchesInstance<DerivativeId>, DerivativeId> MatchesInstance<DerivativeId> for EnsureNotDerivativeInstance<Registry, Matcher>
fn matches_instance(asset: &Asset) -> Result<DerivativeId, Error>
Auto Trait Implementations§
impl<Registry, Matcher> Freeze for EnsureNotDerivativeInstance<Registry, Matcher>
impl<Registry, Matcher> RefUnwindSafe for EnsureNotDerivativeInstance<Registry, Matcher>where
Registry: RefUnwindSafe,
Matcher: RefUnwindSafe,
impl<Registry, Matcher> Send for EnsureNotDerivativeInstance<Registry, Matcher>
impl<Registry, Matcher> Sync for EnsureNotDerivativeInstance<Registry, Matcher>
impl<Registry, Matcher> Unpin for EnsureNotDerivativeInstance<Registry, Matcher>
impl<Registry, Matcher> UnwindSafe for EnsureNotDerivativeInstance<Registry, Matcher>where
Registry: UnwindSafe,
Matcher: UnwindSafe,
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