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.