code: func Fuzz(input []byte) int {
  	_, _, err := Execute(input, input, &Config{
  		GasLimit: 3000000,
  	})
  
  	// invalid opcode
  	if err != nil && len(err.Error()) > 6 && string(err.Error()[:7]) == "invalid" {
  		return 0
  	}
  
  	return 1
  }
docs: // Fuzz is the basic entry point for the go-fuzz tool
  //
  // This returns 1 for valid parsable/runable code, 0
  // for invalid opcode.