pub unsafe extern "C" fn open_syscall_handler(
db: *mut c_void,
rc: *mut c_void,
signed_tx: FFISerializedSignedTransaction,
) -> OpenSyscallHandlerResultpub unsafe extern "C" fn open_syscall_handler(
db: *mut c_void,
rc: *mut c_void,
signed_tx: FFISerializedSignedTransaction,
) -> OpenSyscallHandlerResult