feat: gRPC query for operator and chain configuration

CHANGELOG.md

@@ -39,6 +39,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Features
 
+* (grpc) [#13485](https://github.com/cosmos/cosmos-sdk/pull/13485) Implement a new gRPC query, `/cosmos/base/node/v1beta1/config`, which provides operator and chain configuration.
 * (x/staking) [#13122](https://github.com/cosmos/cosmos-sdk/pull/13122) Add `UnbondingCanComplete` and `PutUnbondingOnHold` to `x/staking` module.
 * [#13437](https://github.com/cosmos/cosmos-sdk/pull/13437) Add new flag `--modules-to-export` in `simd export` command to export only selected modules.
 * [#13435](https://github.com/cosmos/cosmos-sdk/pull/13435) Extend error context when a simulation fails.

UPGRADING.md

@@ -8,6 +8,14 @@ This guide provides instructions for upgrading to specific versions of Cosmos SD
 
 Remove `RandomizedParams` from `AppModuleSimulation` interface. Previously, it used to generate random parameter changes during simulations, however, it does so through ParamChangeProposal which is now legacy. Since all modules were migrated, we can now safely remove this from `AppModuleSimulation` interface.
 
+### gRPC
+
+A new gRPC service, `proto/cosmos/base/node/v1beta1/query.proto`, has been introduced
+which exposes various chain and operator configuration. App developers should be
+sure to register the service with the gRPC-gateway service via
+`nodeservice.RegisterGRPCGatewayRoutes` in their application construction, which
+is typically found in `RegisterAPIRoutes`.
+
 ### AppModule Interface
 
 Remove `Querier`, `Route` and `LegacyQuerier` from the app module interface. This removes and fully deprecates all legacy queriers. All modules no longer support the REST API previously known as the LCD, and the `sdk.Msg#Route` method won't be used anymore.