Rust pop-quiz: FIN order-book addresses

Rust pop-quiz:

The following from @OcebotKuji is an endpoint to order-book metadata: https://kuji.dev.beepolar.com/index.php/kbridge/candles?contract=kujira1a0fyanyqm496fpgneqawhlsug6uqfvqg2epnw39q0jdenw3zs8zqsjhdr0&precision=1D&from=2023-01-10T13:43:14.000Z&to=2023-01-11T13:43:14.000Z

1. which order book?
2. map order books to kujira addresses, either by enhancing the OrderBook-type or creating a HashMap, your choice.

That's it. That's the quiz.

OrderBook type

• (indirect answer)