Function holochain_state::chain_lock::is_chain_locked

pub fn is_chain_locked(
    txn: &Transaction<'_>, 
    lock: &[u8], 
    author: &AgentPubKey
) -> StateMutationResult<bool>

True if the chain is currently locked for the given lock id. The chain is never locked for the id that created it. The chain is always locked for all other ids until the lock end time is in the past.