Initialize the contract
backstop - The backstop addressfn __constructor(env: soroban_sdk::Env, backstop: soroban_sdk::Address)
Fill an interest auction
from - The address to fill the auction frompool - The pool addressfn fill_interest(
env: soroban_sdk::Env,
from: soroban_sdk::Address,
pool: soroban_sdk::Address,
)