feat(types/collections): add LegacyDec collection value (#21693)

Co-authored-by: Luca Graziotti <[email protected]>
(cherry picked from commit 3bc707a)

# Conflicts:
#	types/collections.go

types/collections.go

@@ -32,11 +32,41 @@ var (
 	// IntValue represents a collections.ValueCodec to work with Int.
 	IntValue collcodec.ValueCodec[math.Int] = intValueCodec{}
 
+<<<<<<< HEAD
+=======
+	// UintValue represents a collections.ValueCodec to work with Uint.
+	UintValue collcodec.ValueCodec[math.Uint] = uintValueCodec{}
+
+	// LegacyDecValue represents a collections.ValueCodec to work with LegacyDec.
+	LegacyDecValue collcodec.ValueCodec[math.LegacyDec] = legacyDecValueCodec{}
+
+>>>>>>> 3bc707a5a (feat(types/collections): add `LegacyDec` collection value (#21693))
 	// TimeKey represents a collections.KeyCodec to work with time.Time
 	// Deprecated: exists only for state compatibility reasons, should not
 	// be used for new storage keys using time. Please use the time KeyCodec
 	// provided in the collections package.
 	TimeKey collcodec.KeyCodec[time.Time] = timeKeyCodec{}
+<<<<<<< HEAD
+=======
+
+	// LEUint64Key is a collections KeyCodec that encodes uint64 using little endian.
+	// NOTE: it MUST NOT be used by other modules, distribution relies on this only for
+	// state backwards compatibility.
+	// Deprecated: use collections.Uint64Key instead.
+	LEUint64Key collcodec.KeyCodec[uint64] = leUint64Key{}
+
+	// LengthPrefixedBytesKey is a collections KeyCodec to work with []byte.
+	// Deprecated: exists only for state compatibility reasons, should not be
+	// used for new storage keys using []byte. Please use the BytesKey provided
+	// in the collections package.
+	LengthPrefixedBytesKey collcodec.KeyCodec[[]byte] = lengthPrefixedBytesKey{collections.BytesKey}
+)
+
+const (
+	Int       string = "math.Int"
+	Uint      string = "math.Uint"
+	LegacyDec string = "math.LegacyDec"
+>>>>>>> 3bc707a5a (feat(types/collections): add `LegacyDec` collection value (#21693))
 )
 
 type addressUnion interface {
@@ -166,6 +196,42 @@ func (i intValueCodec) ValueType() string {
 	return "math.Int"
 }
 
+type legacyDecValueCodec struct{}
+
+func (i legacyDecValueCodec) Encode(value math.LegacyDec) ([]byte, error) {
+	return value.Marshal()
+}
+
+func (i legacyDecValueCodec) Decode(b []byte) (math.LegacyDec, error) {
+	v := new(math.LegacyDec)
+	err := v.Unmarshal(b)
+	if err != nil {
+		return math.LegacyDec{}, err
+	}
+	return *v, nil
+}
+
+func (i legacyDecValueCodec) EncodeJSON(value math.LegacyDec) ([]byte, error) {
+	return value.MarshalJSON()
+}
+
+func (i legacyDecValueCodec) DecodeJSON(b []byte) (math.LegacyDec, error) {
+	v := new(math.LegacyDec)
+	err := v.UnmarshalJSON(b)
+	if err != nil {
+		return math.LegacyDec{}, err
+	}
+	return *v, nil
+}
+
+func (i legacyDecValueCodec) Stringify(value math.LegacyDec) string {
+	return value.String()
+}
+
+func (i legacyDecValueCodec) ValueType() string {
+	return LegacyDec
+}
+
 type timeKeyCodec struct{}
 
 func (timeKeyCodec) Encode(buffer []byte, key time.Time) (int, error) {