fn exec_op(
env: soroban_sdk::Env,
initiator: soroban_sdk::Address,
token: soroban_sdk::Address,
amount: i128,
fee: i128,
)
fn flash_seed(env: soroban_sdk::Env)
fn initialize(env: soroban_sdk::Env, receiver: soroban_sdk::Address)
fn initialize_receiver(env: soroban_sdk::Env, seeder: soroban_sdk::Address)