Static secp256k1_zkp_sys::secp256k1_nonce_function_rfc6979

pub static secp256k1_nonce_function_rfc6979: Option<unsafe extern "C" fn(_: *mut u8, _: *const u8, _: *const u8, _: *const u8, _: *mut c_void, _: u32) -> i32>