Function decrypt_log_record 

pub fn decrypt_log_record(
    key: &SecretKey,
    lineage: &[u8],
    log_version: u64,
    payload: &[u8],
) -> Result<Vec<u8>, CryptError>

Authenticates and decrypts one transaction-log record payload.

log_version is the lease version of the file or object the payload was read from; supplying another one fails authentication rather than returning a record from the wrong version file.

Errors

Returns a CryptError for a malformed payload, the wrong key, a mismatched lineage or log version, or tampering.