Function add_external_asset 

pub fn add_external_asset<T: Config>(
    internal_asset: T::AssetId,
    external_asset: T::AssetId,
)

Approve an external asset for a given internal asset.

Snapshots the external asset’s live decimals at registration time and increments PsmInfo::external_count.

Dispatch Origin

Must match the PSM instance’s full_admin (the Full privilege level).

Parameters

• internal_asset: The PSM instance to approve the external on.
• external_asset: The external asset to approve.

Errors

• Error::InsufficientPrivilege: If the origin only has Emergency privileges.
• Error::PsmNotFound: If no PSM is registered for internal_asset.
• Error::TooManyAssets: If the PSM is already at Config::MaxExternals.
• Error::AssetAlreadyApproved: If external_asset is already approved on this PSM.
• Error::AssetDoesNotExist: If external_asset does not exist in the underlying fungibles backend.
• Error::DecimalsMismatch: If the internal asset’s live decimals diverged from the snapshot in PsmInfo.
• Error::DecimalsRangeExceeded: If |asset_decimals − internal_decimals| exceeds MAX_DECIMALS_DIFF.

Events

• Event::ExternalAssetAdded: Emitted on a successful approval.

Warning: Doc-Only

This function is an automatically generated, and is doc-only, uncallable stub. See the real version in Pallet::add_external_asset.