Interface EngineServerSubscriptionFillEvent

interface EngineServerSubscriptionFillEvent {
    type: "fill";
    product_id: number;
    timestamp: string;
    subaccount: string;
    order_digest: string;
    filled_qty: string;
    remaining_qty: string;
    original_qty: string;
    price: string;
    is_taker: boolean;
    is_bid: boolean;
    fee: string;
    submission_idx: string;
    appendix: string;
}