chore: move generic txdecoder (#22653)

(cherry picked from commit f153426)

client/tx_config.go

@@ -1,8 +1,10 @@
 package client
 
 import (
+	"errors"
 	"time"
 
+	"cosmossdk.io/core/transaction"
 	txsigning "cosmossdk.io/x/tx/signing"
 
 	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
@@ -68,3 +70,44 @@ type (
 		SetExtensionOptions(extOpts ...*codectypes.Any)
 	}
 )
+
+var _ transaction.Codec[transaction.Tx] = &DefaultTxDecoder[transaction.Tx]{}
+
+// DefaultTxDecoder is a generic transaction decoder that implements the transaction.Codec interface.
+type DefaultTxDecoder[T transaction.Tx] struct {
+	TxConfig TxConfig
+}
+
+// Decode decodes a binary transaction into type T using the TxConfig's TxDecoder.
+func (t *DefaultTxDecoder[T]) Decode(bz []byte) (T, error) {
+	var out T
+	tx, err := t.TxConfig.TxDecoder()(bz)
+	if err != nil {
+		return out, err
+	}
+
+	var ok bool
+	out, ok = tx.(T)
+	if !ok {
+		return out, errors.New("unexpected Tx type")
+	}
+
+	return out, nil
+}
+
+// DecodeJSON decodes a JSON transaction into type T using the TxConfig's TxJSONDecoder.
+func (t *DefaultTxDecoder[T]) DecodeJSON(bz []byte) (T, error) {
+	var out T
+	tx, err := t.TxConfig.TxJSONDecoder()(bz)
+	if err != nil {
+		return out, err
+	}
+
+	var ok bool
+	out, ok = tx.(T)
+	if !ok {
+		return out, errors.New("unexpected Tx type")
+	}
+
+	return out, nil
+}

simapp/v2/simdv2/cmd/commands.go

@@ -1,7 +1,6 @@
 package cmd
 
 import (
-	"errors"
 	"io"
 
 	"github.com/spf13/cobra"
@@ -108,7 +107,7 @@ func InitRootCmd[T transaction.Tx](
 			simApp.Store(),
 			simApp.App.AppManager,
 			simApp.AppCodec(),
-			&genericTxDecoder[T]{deps.TxConfig},
+			&client.DefaultTxDecoder[T]{TxConfig: deps.TxConfig},
 			simApp.App.QueryHandlers(),
 			simApp.App.SchemaDecoderResolver(),
 			initCometOptions[T](),
@@ -243,43 +242,3 @@ func RootCommandPersistentPreRun(clientCtx client.Context) func(*cobra.Command,
 		return nil
 	}
 }
-
-var _ transaction.Codec[transaction.Tx] = &genericTxDecoder[transaction.Tx]{}
-
-type genericTxDecoder[T transaction.Tx] struct {
-	txConfig client.TxConfig
-}
-
-// Decode implements transaction.Codec.
-func (t *genericTxDecoder[T]) Decode(bz []byte) (T, error) {
-	var out T
-	tx, err := t.txConfig.TxDecoder()(bz)
-	if err != nil {
-		return out, err
-	}
-
-	var ok bool
-	out, ok = tx.(T)
-	if !ok {
-		return out, errors.New("unexpected Tx type")
-	}
-
-	return out, nil
-}
-
-// DecodeJSON implements transaction.Codec.
-func (t *genericTxDecoder[T]) DecodeJSON(bz []byte) (T, error) {
-	var out T
-	tx, err := t.txConfig.TxJSONDecoder()(bz)
-	if err != nil {
-		return out, err
-	}
-
-	var ok bool
-	out, ok = tx.(T)
-	if !ok {
-		return out, errors.New("unexpected Tx type")
-	}
-
-	return out, nil
-}