RE: Enable Whitelist Stargate Query

CHANGELOG.md

@@ -72,6 +72,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * [#1667](https://github.com/osmosis-labs/osmosis/pull/1673) Move wasm-bindings code out of app package into its own root level package.
 * [#2013](https://github.com/osmosis-labs/osmosis/pull/2013) Make `SetParams`, `SetPool`, `SetTotalLiquidity`, and `SetDenomLiquidity` GAMM APIs private
 * [#1857](https://github.com/osmosis-labs/osmosis/pull/1857) x/mint rename GetLastHalvenEpochNum to GetLastReductionEpochNum
+* [#2353](https://github.com/osmosis-labs/osmosis/pull/2353) Re-enable stargate query via whitelsit
 * [#2394](https://github.com/osmosis-labs/osmosis/pull/2394) Remove unused interface methods from expected keepers of each module
 * [#2390](https://github.com/osmosis-labs/osmosis/pull/2390) x/mint remove unused mintCoins parameter from AfterDistributeMintedCoin
 * [#2418](https://github.com/osmosis-labs/osmosis/pull/2418) x/mint remove SetInitialSupplyOffsetDuringMigration from keeper

app/keepers/keepers.go

@@ -325,6 +325,7 @@ func (appKeepers *AppKeepers) InitNormalKeepers(
 	supportedFeatures := "iterator,staking,stargate,osmosis"
 
 	wasmOpts = append(owasm.RegisterCustomPlugins(appKeepers.GAMMKeeper, appKeepers.BankKeeper, appKeepers.TwapKeeper, appKeepers.TokenFactoryKeeper), wasmOpts...)
+	wasmOpts = append(owasm.RegisterStargateQueries(*bApp.GRPCQueryRouter(), appCodec), wasmOpts...)
 
 	wasmKeeper := wasm.NewKeeper(
 		appCodec,

wasmbinding/query_plugin.go

@@ -5,12 +5,46 @@ import (
 	"fmt"
 
 	wasmvmtypes "github.com/CosmWasm/wasmvm/types"
+	"github.com/cosmos/cosmos-sdk/baseapp"
+	"github.com/cosmos/cosmos-sdk/codec"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
+	proto "github.com/gogo/protobuf/proto"
+	abci "github.com/tendermint/tendermint/abci/types"
 
 	"github.com/osmosis-labs/osmosis/v11/wasmbinding/bindings"
 )
 
+// StargateQuerier dispatches whitelisted stargate queries
+func StargateQuerier(queryRouter baseapp.GRPCQueryRouter, codec codec.Codec) func(ctx sdk.Context, request *wasmvmtypes.StargateQuery) ([]byte, error) {
+	return func(ctx sdk.Context, request *wasmvmtypes.StargateQuery) ([]byte, error) {
+		protoResponse, whitelisted := StargateWhitelist.Load(request.Path)
+		if !whitelisted {
+			return nil, wasmvmtypes.UnsupportedRequest{Kind: fmt.Sprintf("'%s' path is not allowed from the contract", request.Path)}
+		}
+
+		route := queryRouter.Route(request.Path)
+		if route == nil {
+			return nil, wasmvmtypes.UnsupportedRequest{Kind: fmt.Sprintf("No route to query '%s'", request.Path)}
+		}
+
+		res, err := route(ctx, abci.RequestQuery{
+			Data: request.Data,
+			Path: request.Path,
+		})
+		if err != nil {
+			return nil, err
+		}
+
+		bz, err := ConvertProtoToJsonMarshal(protoResponse, res.Value, codec)
+		if err != nil {
+			return nil, err
+		}
+
+		return bz, nil
+	}
+}
+
 // CustomQuerier dispatches custom CosmWasm bindings queries.
 func CustomQuerier(qp *QueryPlugin) func(ctx sdk.Context, request json.RawMessage) ([]byte, error) {
 	return func(ctx sdk.Context, request json.RawMessage) ([]byte, error) {
@@ -138,6 +172,30 @@ func CustomQuerier(qp *QueryPlugin) func(ctx sdk.Context, request json.RawMessag
 	}
 }
 
+// ConvertProtoToJsonMarshal  unmarshals the given bytes into a proto message and then marshals it to json.
+// This is done so that clients calling stargate queries do not need to define their own proto unmarshalers,
+// being able to use response directly by json marshalling, which is supported in cosmwasm.
+func ConvertProtoToJsonMarshal(protoResponse interface{}, bz []byte, codec codec.Codec) ([]byte, error) {
+	// all values are proto message
+	message, ok := protoResponse.(proto.Message)
+	if !ok {
+		return nil, wasmvmtypes.Unknown{}
+	}
+
+	// unmarshal binary into stargate response data structure
+	err := proto.Unmarshal(bz, message)
+	if err != nil {
+		return nil, wasmvmtypes.Unknown{}
+	}
+
+	bz, err = codec.MarshalJSON(message)
+	if err != nil {
+		return nil, wasmvmtypes.Unknown{}
+	}
+
+	return bz, nil
+}
+
 // ConvertSdkCoinsToWasmCoins converts sdk type coins to wasm vm type coins
 func ConvertSdkCoinsToWasmCoins(coins []sdk.Coin) wasmvmtypes.Coins {
 	var toSend wasmvmtypes.Coins