calculate_fee: RuntimeDescriptor<[command: Enum<{
    AgentExecute: {
        agent_id: FixedSizeBinary<32>;
        command: Enum<{
            TransferToken: {
                amount: bigint;
                recipient: FixedSizeBinary<20>;
                token: FixedSizeBinary<20>;
            };
        }>;
    };
    CreateAgent: {
        agent_id: FixedSizeBinary<32>;
    };
    CreateChannel: {
        agent_id: FixedSizeBinary<32>;
        channel_id: FixedSizeBinary<32>;
        mode: Enum<{
            Normal: undefined;
            RejectingOutboundMessages: undefined;
        }>;
    };
    SetOperatingMode: {
        mode: Enum<{
            Normal: undefined;
            RejectingOutboundMessages: undefined;
        }>;
    };
    SetPricingParameters: {
        delivery_cost: bigint;
        exchange_rate: FixedSizeArray<4, bigint>;
        multiplier: FixedSizeArray<4, bigint>;
    };
    SetTokenTransferFees: {
        create_asset_xcm: bigint;
        register_token: FixedSizeArray<4, bigint>;
        transfer_asset_xcm: bigint;
    };
    TransferNativeFromAgent: {
        agent_id: FixedSizeBinary<32>;
        amount: bigint;
        recipient: FixedSizeBinary<20>;
    };
    UpdateChannel: {
        channel_id: FixedSizeBinary<32>;
        mode: Enum<{
            Normal: undefined;
            RejectingOutboundMessages: undefined;
        }>;
    };
    Upgrade: {
        impl_address: FixedSizeBinary<20>;
        impl_code_hash: FixedSizeBinary<32>;
        initializer?: {
            maximum_required_gas: bigint;
            params: Binary;
        };
    };
}>, parameters: {
    exchange_rate: bigint;
    fee_per_gas: FixedSizeArray<4, bigint>;
    multiplier: bigint;
    rewards: {
        local: bigint;
        remote: FixedSizeArray<4, bigint>;
    };
} | undefined], {
    local: bigint;
    remote: bigint;
}>

Calculate the delivery fee for command