fn upgrade(env: soroban_sdk::Env, new_wasm_hash: soroban_sdk::BytesN<32>)
fn init(
env: soroban_sdk::Env,
config: StackerConfig,
deposit_token: soroban_sdk::Address,
lee_way: i128,
)
fn keeper(env: soroban_sdk::Env, args: KeeperArgs) -> u128
fn claim_fee(env: soroban_sdk::Env, amount: i128)
fn deposit(
env: soroban_sdk::Env,
depositor: soroban_sdk::Address,
amount: i128,
) -> i128
fn balance(env: soroban_sdk::Env, depositor: soroban_sdk::Address) -> i128
fn withdraw(
env: soroban_sdk::Env,
depositor: soroban_sdk::Address,
amount: i128,
) -> i128