feat: add query local min-gas-price (#2627)

* feat: add query local min-gas-price

* docs: add changelog

* test: add test for query local min-gas-prices

* test: add test for local min-gas-price query

* fix: test query min-gas-price

(cherry picked from commit 353410e)

.changelog/unreleased/features/2629-add-query-local-min-gas-prices.md

@@ -0,0 +1,3 @@
+- register NodeService to enable query /cosmos/base/node/v1beta1/config
+  gRPC query to disclose node operator's configured minimum-gas-price.
+  ([\#2629](https://github.com/cosmos/gaia/issues/2629))

app/app.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/cosmos/cosmos-sdk/baseapp"
 	"github.com/cosmos/cosmos-sdk/client"
+	nodeservice "github.com/cosmos/cosmos-sdk/client/grpc/node"
 	"github.com/cosmos/cosmos-sdk/client/grpc/tmservice"
 	"github.com/cosmos/cosmos-sdk/client/rpc"
 	"github.com/cosmos/cosmos-sdk/codec"
@@ -342,6 +343,8 @@ func (app *GaiaApp) SimulationManager() *module.SimulationManager {
 func (app *GaiaApp) RegisterAPIRoutes(apiSvr *api.Server, apiConfig config.APIConfig) {
 	clientCtx := apiSvr.ClientCtx
 	rpc.RegisterRoutes(clientCtx, apiSvr.Router)
+
+	nodeservice.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 	// Register legacy tx routes.
 	authrest.RegisterTxRoutes(clientCtx, apiSvr.Router)
 	// Register new tx routes from grpc-gateway.
@@ -359,6 +362,11 @@ func (app *GaiaApp) RegisterAPIRoutes(apiSvr *api.Server, apiConfig config.APICo
 	}
 }
 
+// RegisterTxService allows query minimum-gas-prices in app.toml
+func (app *GaiaApp) RegisterNodeService(clientCtx client.Context) {
+	nodeservice.RegisterNodeService(clientCtx, app.GRPCQueryRouter())
+}
+
 // RegisterTxService implements the Application.RegisterTxService method.
 func (app *GaiaApp) RegisterTxService(clientCtx client.Context) {
 	authtx.RegisterTxService(app.BaseApp.GRPCQueryRouter(), clientCtx, app.BaseApp.Simulate, app.interfaceRegistry)

tests/e2e/e2e_rest_regression_test.go

@@ -43,6 +43,7 @@ const (
 	slashingParamsModuleQueryPath       = "/slashing/parameters"
 	stakingParamsModuleQueryPath        = "/staking/parameters"
 	missingPath                         = "/missing_endpoint"
+	localMinGasPriceQueryPath           = "/cosmos/base/node/v1beta1/config"
 )
 
 func (s *IntegrationTestSuite) testRestInterfaces() {
@@ -73,6 +74,8 @@ func (s *IntegrationTestSuite) testRestInterfaces() {
 				{slashingParamsModuleQueryPath, 200},
 				{stakingParamsModuleQueryPath, 200},
 				{missingPath, 501},
+				// node config Endpoint
+				{localMinGasPriceQueryPath, 200},
 			}
 		)