Function timelock_async 

pub async fn timelock_async(
    cadence: Option<TimeLockCadence>,
    time: Option<TimeLockTime>,
    precision: Option<TimePrecision>,
    format: Option<TimeFormat>,
    salts: Option<TimeLockSalts>,
    kdf: Option<KdfParams>,
    params: Option<TimeLockParams>,
) -> Result<TimeLockKey, TimeLockError>

Derive a 32-byte time-locked key — unified async entry point.

Async counterpart of timelock. Same params-based routing: set params = Some(header) for the decryption path, or params = None with all other arguments as Some(...) for the encryption path. All arguments are taken by value; the blocking KDF work is offloaded to a Tokio blocking thread.

Errors

Same as timelock, plus TimeLockError::TaskPanic if the spawned task panics.