feat: require compile-time flag to enable liquidator query

CHANGELOG.md

@@ -98,6 +98,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 - [1331](https://github.com/umee-network/umee/pull/1331) Implemented MinCollateralLiquidity.
 - [1343](https://github.com/umee-network/umee/pull/1343) RepayBadDebt and Liquidate automatically clear blacklisted collateral.
 - [1379](https://github.com/umee-network/umee/pull/1379) Add `mininumCommissionRate` update to all validators.
+- [1395](https://github.com/umee-network/umee/pull/1395) Require compile-time flag to enable liquidation_targets query.
 
 ### Improvements
 

Makefile

@@ -9,7 +9,8 @@ LEDGER_ENABLED ?= true
 TM_VERSION     := $(shell go list -m github.com/tendermint/tendermint | sed 's:.* ::')
 DOCKER         := $(shell which docker)
 PROJECT_NAME   := umee
-HTTPS_GIT 		 := https://github.com/umee-network/umee.git
+HTTPS_GIT      := https://github.com/umee-network/umee.git
+LIQUIDATOR     := $(if $(LIQUIDATOR),true,false)
 
 ###############################################################################
 ##                                  Version                                  ##
@@ -62,7 +63,8 @@ ldflags = -X github.com/cosmos/cosmos-sdk/version.Name=umee \
 		  -X github.com/cosmos/cosmos-sdk/version.Version=$(VERSION) \
 		  -X github.com/cosmos/cosmos-sdk/version.Commit=$(COMMIT) \
 		  -X "github.com/cosmos/cosmos-sdk/version.BuildTags=$(build_tags_comma_sep)" \
-		  -X github.com/tendermint/tendermint/version.TMCoreSemVer=$(TM_VERSION)
+		  -X github.com/tendermint/tendermint/version.TMCoreSemVer=$(TM_VERSION) \
+		  -X github.com/umee-network/umee/v3/x/leverage/keeper.EnableLiquidator=$(LIQUIDATOR)
 
 ldflags += $(LDFLAGS)
 ldflags := $(strip $(ldflags))
@@ -80,6 +82,9 @@ build-no_cgo:
 build-linux: go.sum
 	LEDGER_ENABLED=false GOOS=linux GOARCH=amd64 $(MAKE) build
 
+build-liquidator:
+	LIQUIDATOR=true $(MAKE) build
+
 install: go.sum
 	@echo "--> Installing..."
 	go install -mod=readonly $(BUILD_FLAGS) ./...

x/leverage/keeper/grpc_query.go

@@ -2,6 +2,7 @@ package keeper
 
 import (
 	"context"
+	"strings"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"google.golang.org/grpc/codes"
@@ -10,6 +11,9 @@ import (
 	"github.com/umee-network/umee/v3/x/leverage/types"
 )
 
+// EnableLiquidator must be set to "true" at compile time to enable QueryLiquidationTargets
+var EnableLiquidator = ""
+
 var _ types.QueryServer = Querier{}
 
 // Querier implements a QueryServer for the x/leverage module.
@@ -237,6 +241,10 @@ func (q Querier) LiquidationTargets(
 		return nil, status.Error(codes.InvalidArgument, "empty request")
 	}
 
+	if strings.ToLower(EnableLiquidator) != "true" {
+		return nil, types.ErrNotLiquidatorNode
+	}
+
 	ctx := sdk.UnwrapSDKContext(goCtx)
 
 	targets, err := q.Keeper.GetEligibleLiquidationTargets(ctx)

x/leverage/keeper/grpc_query_test.go

@@ -5,6 +5,7 @@ import (
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 
+	"github.com/umee-network/umee/v3/x/leverage/keeper"
 	"github.com/umee-network/umee/v3/x/leverage/types"
 )
 
@@ -118,6 +119,13 @@ func (s *IntegrationTestSuite) TestQuerier_AccountSummary() {
 func (s *IntegrationTestSuite) TestQuerier_LiquidationTargets() {
 	ctx, require := s.ctx, s.Require()
 
+	keeper.EnableLiquidator = "false"
+
+	_, err := s.queryClient.LiquidationTargets(ctx.Context(), &types.QueryLiquidationTargets{})
+	require.ErrorIs(err, types.ErrNotLiquidatorNode)
+
+	keeper.EnableLiquidator = "true"
+
 	resp, err := s.queryClient.LiquidationTargets(ctx.Context(), &types.QueryLiquidationTargets{})
 	require.NoError(err)
 

x/leverage/keeper/suite_test.go

@@ -49,6 +49,9 @@ func (s *IntegrationTestSuite) SetupTest() {
 		Time:    time.Unix(0, 0),
 	})
 
+	// Enable liquidation queries for testing
+	keeper.EnableLiquidator = "true"
+
 	umeeToken := newToken(appparams.BondDenom, "UMEE")
 	atomIBCToken := newToken(atomDenom, "ATOM")
 

x/leverage/types/errors.go

@@ -49,4 +49,7 @@ var (
 	ErrInvalidExchangeRate     = sdkerrors.Register(ModuleName, 604, "exchange rate less than one")
 	ErrInconsistentTotalBorrow = sdkerrors.Register(ModuleName, 605, "total adjusted borrow inconsistency")
 	ErrExcessiveTimeElapsed    = sdkerrors.Register(ModuleName, 606, "excessive time elapsed since last interest time")
+
+	// 7XX = Disabled Functionality
+	ErrNotLiquidatorNode = sdkerrors.Register(ModuleName, 700, "node has disabled liquidator queries")
 )