Optionalbase_Base cost of creating a data receipt.
Both send and exec costs are burned when a new receipt has input dependencies. The gas
is charged for each input dependency. The dependencies are specified when a receipt is
created using promise_then and promise_batch_then.
NOTE: Any receipt with output dependencies will produce data receipts. Even if it fails.
Even if the last action is not a function call (in case of success it will return empty
value).
Optionalcost_Additional cost per byte sent.
Both send and exec costs are burned when a function call finishes execution and returns
N bytes of data to every output dependency. For each output dependency the cost is
(send(sir) + exec()) * N.
The fees settings for a data receipt creation