feat(schema/appdata)!: efficiency & data model improvements aligned with server/v2 (#21305)

schema/decoding/resolver.go

@@ -1,6 +1,7 @@
 package decoding
 
 import (
+	"fmt"
 	"sort"
 
 	"cosmossdk.io/schema"
@@ -8,6 +9,12 @@ import (
 
 // DecoderResolver is an interface that allows indexers to discover and use module decoders.
 type DecoderResolver interface {
+	// DecodeModuleName decodes a module name from a byte slice passed as the actor in a KVPairUpdate.
+	DecodeModuleName([]byte) (string, error)
+
+	// EncodeModuleName encodes a module name into a byte slice that can be used as the actor in a KVPairUpdate.
+	EncodeModuleName(string) ([]byte, error)
+
 	// IterateAll iterates over all available module decoders.
 	IterateAll(func(moduleName string, cdc schema.ModuleCodec) error) error
 
@@ -27,6 +34,20 @@ type moduleSetDecoderResolver struct {
 	moduleSet map[string]interface{}
 }
 
+func (a moduleSetDecoderResolver) DecodeModuleName(bytes []byte) (string, error) {
+	if _, ok := a.moduleSet[string(bytes)]; ok {
+		return string(bytes), nil
+	}
+	return "", fmt.Errorf("module %s not found", bytes)
+}
+
+func (a moduleSetDecoderResolver) EncodeModuleName(s string) ([]byte, error) {
+	if _, ok := a.moduleSet[s]; ok {
+		return []byte(s), nil
+	}
+	return nil, fmt.Errorf("module %s not found", s)
+}
+
 func (a moduleSetDecoderResolver) IterateAll(f func(string, schema.ModuleCodec) error) error {
 	keys := make([]string, 0, len(a.moduleSet))
 	for k := range a.moduleSet {