In a large bowl, mix together the panko, onion powder, garlic salt, basil, oregano, salt, and pepper. In a separate medium-sized bowl, mix together the buttermilk, flour, cornstarch, egg, and sriracha. Set aside.
Heat about 1/2 inch of vegetable oil in a skillet over medium-high heat.
Dip a shrimp into the buttermilk mixture, using a fork to remove any excess batter.
Immediately place the shrimp into the panko mixture, ensuring it is well coated. Place the coated shrimp into the hot skillet.
Work in batches, being careful not to overcrowd the skillet. Allow each shrimp to cook for 2-3 minutes until golden brown, then flip and cook for another 1-2 minutes until both sides are crispy.
Remove the cooked shrimp from the skillet and place them on a paper towel-lined plate to drain. Repeat the process until all the shrimp have been cooked.
For the sweet chili sauce, combine all the ingredients in a bowl and whisk until well combined.
Once all the shrimp are cooked, you can either toss them in the sauce to coat, serve the sauce as a dipping sauce on the side, or pour it over the serving platter. The choice is yours!