fn init(
env: soroban_sdk::Env,
sender: soroban_sdk::Address,
escrow: soroban_sdk::Address,
receiver: soroban_sdk::Address,
)
fn lock_funds(env: soroban_sdk::Env, memo: soroban_sdk::String)
fn release_funds(env: soroban_sdk::Env)
fn get_remaining_time(env: soroban_sdk::Env) -> i64
fn get_memo(env: soroban_sdk::Env) -> soroban_sdk::String