For remote work, only worked hours are paid.
Example:
Sur une journée de 8h (352€), si seulement 3h sont travaillées, alors seules ces 3h sont comptées (132€).
This can be applicable whatever the reason on your side which may prevent us to progress on the work (information missing, waiting for feedback of final customer, etc.).
This solution can easily be interesting for you since only working hours are paid.
In addition, when working on spent hours, the scope of work is almost never subject to debate, so no time is wasted in negotiating.