Approvals: StorageDescriptor<[{
    interior: XcmV3Junctions;
    parents: number;
}, SS58String, SS58String], {
    amount: bigint;
    deposit: bigint;
}, true, never>

Approved balance transfers. First balance is the amount approved for transfer. Second is the amount of T::Currency reserved for storing this. First key is the asset ID, second key is the owner and third key is the delegate.