fn checkin(env: soroban_sdk::Env, booking_id: u64)
fn add_host(
env: soroban_sdk::Env,
host: soroban_sdk::Address,
name: soroban_sdk::String,
) -> u64
fn checkout(env: soroban_sdk::Env, booking_id: u64)
fn create_room(
env: soroban_sdk::Env,
host: soroban_sdk::Address,
room_name: soroban_sdk::String,
) -> u64
fn get_booking(env: soroban_sdk::Env, booking_id: u64) -> Booking
fn cancel_booking(env: soroban_sdk::Env, booking_id: u64)
fn create_booking(
env: soroban_sdk::Env,
traveler: soroban_sdk::Address,
host: soroban_sdk::Address,
room_id: u64,
amount: i128,
day_checkin: u64,
day_checkout: u64,
) -> u64