# Context A kernel context — the root runtime object for every validation operation. ``` final class Context ``` ## Overview Holds chain parameters ([`ChainParameters`](/documentation/BitcoinKernel/ChainParameters)), optional [`NotificationCallbacks`](/documentation/BitcoinKernel/NotificationCallbacks) and [`ValidationInterfaceCallbacks`](/documentation/BitcoinKernel/ValidationInterfaceCallbacks), and the interrupt flag that [`interrupt()`](/documentation/BitcoinKernel/Context/interrupt()) toggles. A [`ChainstateManager`](/documentation/BitcoinKernel/ChainstateManager) takes a context by reference, so one context can back multiple managers — typical applications use a single long-lived context per process. The kernel documents contexts as thread-safe for use from multiple threads simultaneously. Create once, share freely. Wraps the opaque `btck_Context` type; `deinit` calls `btck_context_destroy` when the last Swift reference drops.