[Aptos Framework] Validate against empty execution hash in voting::resolve() #2154
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Description
Empty execution hash technically is not exploitable as transaction_context::script_hash() only returns empty if voting::resolve() is called from a script function and not script. This is not a serious issue as the transaction can only call voting::resolve() but cannot do anything else (script function is a single call per transaction). However, we might as well add a validation against empty execution hash for peace of mind.
Test Plan
Unit Tests
This change is