# LoggingConnection A connection to the kernel’s internal logging system. ``` final class LoggingConnection ``` ## Overview ### Opt-in by construction Kernel logging is dormant until you explicitly create a [`LoggingConnection`](/documentation/BitcoinKernel/LoggingConnection): there is no default, always-on destination. An application that does not want kernel log output simply never instantiates one — no build flag required. This replaces the `DISABLE_KERNEL_LOGGING` build-flag pattern some downstream projects have used; the equivalent opt-out here is just to skip construction. For belt-and-suspenders silence (skip the internal logger entirely), call [`disableLogging()`](/documentation/BitcoinKernel/disableLogging()) once at program startup before any connection is created. After [`disableLogging()`](/documentation/BitcoinKernel/disableLogging()) has been called, no further connections can be created and kernel log writes become no-ops. ### Buffering Messages logged before a connection is created are buffered (up to 1 MB) and delivered immediately when the first connection is established. Wraps the opaque `btck_LoggingConnection` type. ARC via `deinit` calls `btck_logging_connection_destroy` when the last reference drops.