feat: add param query to x/tariff module (backport #277) (#280)

.changelog/unreleased/improvements/277-tariff-query.md

@@ -0,0 +1 @@
+- Implement a parameter query for the `x/tariff` module. ([#277](https://github.com/strangelove-ventures/noble/pull/277))

proto/tariff/query.proto

@@ -0,0 +1,21 @@
+syntax = "proto3";
+
+package noble.tariff;
+
+import "gogoproto/gogo.proto";
+import "google/api/annotations.proto";
+import "tariff/params.proto";
+
+option go_package = "github.com/strangelove-ventures/noble/x/tariff/types";
+
+service Query {
+  rpc Params(QueryParamsRequest) returns (QueryParamsResponse) {
+    option (google.api.http).get = "/noble/tariff/v1/params";
+  }
+}
+
+message QueryParamsRequest {}
+
+message QueryParamsResponse {
+  Params params = 1 [(gogoproto.nullable) = false];
+}

x/tariff/client/cli/query.go

@@ -0,0 +1,49 @@
+package cli
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/cosmos/cosmos-sdk/client"
+	"github.com/cosmos/cosmos-sdk/client/flags"
+	"github.com/spf13/cobra"
+	"github.com/strangelove-ventures/noble/x/tariff/types"
+)
+
+// GetQueryCmd returns the cli query commands for this module
+func GetQueryCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:                        types.ModuleName,
+		Short:                      fmt.Sprintf("Querying commands for the %s module", types.ModuleName),
+		DisableFlagParsing:         true,
+		SuggestionsMinimumDistance: 2,
+		RunE:                       client.ValidateCmd,
+	}
+
+	cmd.AddCommand(CmdQueryParams())
+
+	return cmd
+}
+
+func CmdQueryParams() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "params",
+		Short: "shows the parameters of the module",
+		Args:  cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			clientCtx := client.GetClientContextFromCmd(cmd)
+			queryClient := types.NewQueryClient(clientCtx)
+
+			res, err := queryClient.Params(context.Background(), &types.QueryParamsRequest{})
+			if err != nil {
+				return err
+			}
+
+			return clientCtx.PrintProto(res)
+		},
+	}
+
+	flags.AddQueryFlagsToCmd(cmd)
+
+	return cmd
+}

x/tariff/keeper/query_server.go

@@ -0,0 +1,17 @@
+package keeper
+
+import (
+	"context"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/strangelove-ventures/noble/x/tariff/types"
+)
+
+var _ types.QueryServer = Keeper{}
+
+func (k Keeper) Params(goCtx context.Context, _ *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
+	ctx := sdk.UnwrapSDKContext(goCtx)
+	params := k.GetParams(ctx)
+
+	return &types.QueryParamsResponse{Params: params}, nil
+}

x/tariff/module.go

@@ -1,22 +1,22 @@
 package tariff
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 
-	"github.com/gorilla/mux"
-	"github.com/grpc-ecosystem/grpc-gateway/runtime"
-	"github.com/spf13/cobra"
-
-	abci "github.com/tendermint/tendermint/abci/types"
-
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/codec"
 	cdctypes "github.com/cosmos/cosmos-sdk/codec/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
+	"github.com/gorilla/mux"
+	"github.com/grpc-ecosystem/grpc-gateway/runtime"
+	"github.com/spf13/cobra"
+	"github.com/strangelove-ventures/noble/x/tariff/client/cli"
 	"github.com/strangelove-ventures/noble/x/tariff/keeper"
 	"github.com/strangelove-ventures/noble/x/tariff/types"
+	abci "github.com/tendermint/tendermint/abci/types"
 )
 
 var (
@@ -67,7 +67,9 @@ func (AppModuleBasic) RegisterRESTRoutes(clientCtx client.Context, rtr *mux.Rout
 }
 
 // RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the module
-func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *runtime.ServeMux) {}
+func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *runtime.ServeMux) {
+	_ = types.RegisterQueryHandlerClient(context.Background(), mux, types.NewQueryClient(clientCtx))
+}
 
 // GetTxCmd returns the root Tx command for the module. The subcommands of this root command are used by end-users to generate new transactions containing messages defined in the module
 func (a AppModuleBasic) GetTxCmd() *cobra.Command {
@@ -76,7 +78,7 @@ func (a AppModuleBasic) GetTxCmd() *cobra.Command {
 
 // GetQueryCmd returns the root query command for the module. The subcommands of this root command are used by end-users to generate new queries to the subset of the state defined by the module
 func (AppModuleBasic) GetQueryCmd() *cobra.Command {
-	return nil
+	return cli.GetQueryCmd()
 }
 
 // ----------------------------------------------------------------------------
@@ -118,7 +120,9 @@ func (am AppModule) LegacyQuerierHandler(_ *codec.LegacyAmino) sdk.Querier {
 }
 
 // RegisterServices registers a gRPC query service to respond to the module-specific gRPC queries
-func (am AppModule) RegisterServices(cfg module.Configurator) {}
+func (am AppModule) RegisterServices(cfg module.Configurator) {
+	types.RegisterQueryServer(cfg.QueryServer(), am.keeper)
+}
 
 // RegisterInvariants registers the invariants of the module. If an invariant deviates from its predicted value, the InvariantRegistry triggers appropriate logic (most often the chain will be halted)
 func (am AppModule) RegisterInvariants(_ sdk.InvariantRegistry) {}