fn init(env: soroban_sdk::Env, admin: soroban_sdk::Address)
fn lock(
env: soroban_sdk::Env,
caller: soroban_sdk::Address,
owner: soroban_sdk::Address,
)
fn unlock(
env: soroban_sdk::Env,
caller: soroban_sdk::Address,
owner: soroban_sdk::Address,
)
fn is_locked(env: soroban_sdk::Env, owner: soroban_sdk::Address) -> bool