fix(server): don't hardcode grpc address to localhost

CHANGELOG.md

@@ -48,6 +48,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
+* (server) [#18254](https://github.com/cosmos/cosmos-sdk/pull/18254) Don't hardcode gRPC address to localhost.
 * (server) [#18251](https://github.com/cosmos/cosmos-sdk/pull/18251) Call `baseapp.Close()` when app started as grpc only.
 * (baseapp) [#17769](https://github.com/cosmos/cosmos-sdk/pull/17769) Ensure we respect block size constraints in the `DefaultProposalHandler`'s `PrepareProposal` handler when a nil or no-op mempool is used. We provide a `TxSelector` type to assist in making transaction selection generalized. We also fix a comparison bug in tx selection when `req.maxTxBytes` is reached.
 * (config) [#17649](https://github.com/cosmos/cosmos-sdk/pull/17649) Fix `mempool.max-txs` configuration is invalid in `app.config`.

server/start.go

@@ -528,7 +528,7 @@ func startAPIserver(config serverconfig.Config, genDocProvider node.GenesisDocPr
 		clientCtx := clientCtx.WithHomeDir(home).WithChainID(genDoc.ChainID)
 
 		if config.GRPC.Enable {
-			_, port, err := net.SplitHostPort(config.GRPC.Address)
+			_, _, err := net.SplitHostPort(config.GRPC.Address)
 			if err != nil {
 				return nil, err
 			}
@@ -543,7 +543,7 @@ func startAPIserver(config serverconfig.Config, genDocProvider node.GenesisDocPr
 				maxRecvMsgSize = serverconfig.DefaultGRPCMaxRecvMsgSize
 			}
 
-			grpcAddress := fmt.Sprintf("127.0.0.1:%s", port)
+			grpcAddress := fmt.Sprintf(config.GRPC.Address)
 
 			grpcClient, err := grpc.Dial(
 				grpcAddress,