Fix/config/measurements in yaml (#135)

Custom type & marshal implementation for measurements to write base64 instead of single bytes

internal/config/measurements.go

@@ -0,0 +1,33 @@
+package config
+
+import "encoding/base64"
+
+type Measurements map[uint32][]byte
+
+func (m Measurements) MarshalYAML() (interface{}, error) {
+	base64Map := make(map[uint32]string)
+
+	for key, value := range m {
+		base64Map[key] = base64.StdEncoding.EncodeToString(value[:])
+	}
+
+	return base64Map, nil
+}
+
+func (m *Measurements) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	base64Map := make(map[uint32]string)
+	err := unmarshal(base64Map)
+	if err != nil {
+		return err
+	}
+
+	*m = make(Measurements)
+	for key, value := range base64Map {
+		measurement, err := base64.StdEncoding.DecodeString(value)
+		if err != nil {
+			return err
+		}
+		(*m)[key] = measurement
+	}
+	return nil
+}