interface JsonRequest {
  start_time?: string,
  end_time?: string
}

interface JsonResponse {
  end_time: string,
  metrics: Array<
    {
      collateralization_ratio: number,
      date: string,
      discrepancy: number,
      discrepancy_usd: number,
      price_snapshot: number,
      total_btc_reserves: number,
      total_minted_supply: number
    },
    {
      collateralization_ratio: number,
      date: string,
      discrepancy: number,
      discrepancy_usd: number,
      price_snapshot: number,
      total_btc_reserves: number,
      total_minted_supply: number
    }
  >,
  start_time: string
}