AssetTxFeePaid: PlainDescriptor<{
    actual_fee: bigint;
    asset_id?: {
        digest: FixedSizeBinary<4>;
        geohash: FixedSizeBinary<5>;
    };
    tip: bigint;
    who: SS58String;
}>

A transaction fee actual_fee, of which tip was added to the minimum inclusion fee, has been paid by who in an asset asset_id.