# ScriptVerificationFlags Flags controlling which BIP-governed consensus rules apply during script verification. ``` struct ScriptVerificationFlags ``` ## Overview Each flag maps to a specific BIP — see the individual flag documentation below for citations. Compose using `OptionSet` syntax: `[.p2sh, .witness, .taproot]`. Use [`all`](/documentation/BitcoinKernel/ScriptVerificationFlags/all) for full mainnet-equivalent verification; leave flags off to simulate validation under older consensus rules (useful for testing pre-activation blocks). Maps to `btck_ScriptVerificationFlags` constants in the kernel C API.