feat(collections): add NewJSONValueCodec

collections/CHANGELOG.md

@@ -33,19 +33,20 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Features
 
-* [#19343](https://github.com/cosmos/cosmos-sdk/pull/19343) – Simplify IndexedMap creation by allowing to infer indexes through reflection.
-* [#18933](https://github.com/cosmos/cosmos-sdk/pull/18933) – Add  LookupMap implementation. It is basic wrapping of the standard Map methods but is not iterable.
-* [#17656](https://github.com/cosmos/cosmos-sdk/pull/17656) – Introduces `Vec`, a collection type that allows to represent a growable array on top of a KVStore.
+* [#19343](https://github.com/cosmos/cosmos-sdk/pull/19343)  Simplify IndexedMap creation by allowing to infer indexes through reflection.
+* [#18933](https://github.com/cosmos/cosmos-sdk/pull/18933)  Add  LookupMap implementation. It is basic wrapping of the standard Map methods but is not iterable.
+* [#17656](https://github.com/cosmos/cosmos-sdk/pull/17656)  Introduces `Vec`, a collection type that allows to represent a growable array on top of a KVStore.
+* [#19861](https://github.com/cosmos/cosmos-sdk/pull/19861) Add `NewJSONValueCodec` value codec as an alternative for `codec.CollValue` from the SDK for non protobuf types.
 
 ## [v0.4.0](https://github.com/cosmos/cosmos-sdk/releases/tag/collections%2Fv0.4.0)
 
 ### Features
 
-* [#17024](https://github.com/cosmos/cosmos-sdk/pull/17024) - Introduces `Triple`, a composite key with three keys.
+* [#17024](https://github.com/cosmos/cosmos-sdk/pull/17024) Introduces `Triple`, a composite key with three keys.
 
 ### API Breaking
 
-* [#17290](https://github.com/cosmos/cosmos-sdk/pull/17290) - Collections iteration methods (Iterate, Walk) will not error when the collection is empty.
+* [#17290](https://github.com/cosmos/cosmos-sdk/pull/17290) Collections iteration methods (Iterate, Walk) will not error when the collection is empty.
 
 ### Improvements
 
@@ -55,20 +56,20 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Features
 
-* [#16074](https://github.com/cosmos/cosmos-sdk/pull/16607) - Introduces `Clear` method for `Map` and `KeySet`
+* [#16074](https://github.com/cosmos/cosmos-sdk/pull/16607) Introduces `Clear` method for `Map` and `KeySet`
 * [#16773](https://github.com/cosmos/cosmos-sdk/pull/16773)
-    * Adds `AltValueCodec` which provides a way to decode a value in two ways.
-    * Adds the possibility to specify an alternative way to decode the values of `KeySet`, `indexes.Multi`, `indexes.ReversePair`. 
+  * Adds `AltValueCodec` which provides a way to decode a value in two ways.
+  * Adds the possibility to specify an alternative way to decode the values of `KeySet`, `indexes.Multi`, `indexes.ReversePair`.
 
 ## [v0.2.0](https://github.com/cosmos/cosmos-sdk/releases/tag/collections%2Fv0.2.0)
 
 ### Features
 
-* [#16074](https://github.com/cosmos/cosmos-sdk/pull/16074) – Makes the generic Collection interface public, still highly unstable.
+* [#16074](https://github.com/cosmos/cosmos-sdk/pull/16074)  Makes the generic Collection interface public, still highly unstable.
 
 ### API Breaking
 
-* [#16127](https://github.com/cosmos/cosmos-sdk/pull/16127) – In the `Walk` method the call back function being passed is allowed to error.
+* [#16127](https://github.com/cosmos/cosmos-sdk/pull/16127)  In the `Walk` method the call back function being passed is allowed to error.
 
 ## [v0.1.0](https://github.com/cosmos/cosmos-sdk/releases/tag/collections%2Fv0.1.0)
 

collections/json.go

@@ -0,0 +1,58 @@
+package collections
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"cosmossdk.io/collections/codec"
+)
+
+func NewJSONValueCodec[T any]() codec.ValueCodec[T] {
+	return jsonValue[T]{
+		typeName: fmt.Sprintf("%T", new(T)),
+	}
+}
+
+type jsonValue[T any] struct {
+	typeName string
+}
+
+// Decode implements codec.ValueCodec.
+func (jsonValue[T]) Decode(b []byte) (T, error) {
+	var t T
+	if err := json.Unmarshal(b, &t); err != nil {
+		return t, err
+	}
+
+	return t, nil
+}
+
+// DecodeJSON implements codec.ValueCodec.
+func (jsonValue[T]) DecodeJSON(b []byte) (T, error) {
+	var t T
+	if err := json.Unmarshal(b, &t); err != nil {
+		return t, err
+	}
+
+	return t, nil
+}
+
+// Encode implements codec.ValueCodec.
+func (jsonValue[T]) Encode(value T) ([]byte, error) {
+	return json.Marshal(value)
+}
+
+// EncodeJSON implements codec.ValueCodec.
+func (jsonValue[T]) EncodeJSON(value T) ([]byte, error) {
+	return json.Marshal(value)
+}
+
+// Stringify implements codec.ValueCodec.
+func (jsonValue[T]) Stringify(value T) string {
+	return fmt.Sprintf("%v", value)
+}
+
+// ValueType implements codec.ValueCodec.
+func (jv jsonValue[T]) ValueType() string {
+	return fmt.Sprintf("json(%s)", jv.typeName)
+}