package tezos-protocol-012-Psithaca

A type for representing existentially quantified tickets (tickets with different types of payloads). An ex_ticket value consists of:

• A type-witness representing the type of the content of the ticket.
• A ticket value of the particular content type.

tickets_of_value ctxt ~include_lazy ty value extracts all tickets from the given shape ty and value value. The include_lazy flag determines whether or not to traverse lazy structures (values from the context). In case the include_lazy flag is true, any big-map contained in the value must have an empty overlay or else an error of type Unsupported_non_empty_overlay is returned. The reason for this restriction is that we assume that all lazy big-map diffs should be applied before calling this function. Dealing with non-empty overlays would be possible in theory, but practically difficult. The challenge is to distinguish between overlapping keys between the context and the overlay.