Static bdk_chain::bitcoin::secp256k1::ffi::secp256k1_nonce_function_bip340
pub static secp256k1_nonce_function_bip340: Option<unsafe extern "C" fn(_: *mut u8, _: *const u8, _: usize, _: *const u8, _: *const u8, _: *const u8, _: usize, _: *mut c_void) -> i32>