Interface Challenge

interface Challenge {
    conditional: number | null;
    goal: number;
    id: number;
    loc: { desc: string; title: string };
    loc_ref: string;
    period: number;
    reward: number;
    subType: number | null;
    tier: number;
    type: number;
    value: string | null;
    valueTwo: string | null;
}