Rpcapi fix - requires Eth namespace (#845)

* update join_network docs * add eth as default in apis * update changelog

Author: araskachoi

CHANGELOG.md

@@ -35,6 +35,11 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 # Changelog
 
+## Unreleased
+
+### API Breaking
+* (eth) [\#845](https://github.com/cosmos/ethermint/pull/845) The `eth` namespace must be included in the list of API's as default to run the rpc server without error.
+
 ## [v0.4.1] - 2021-03-01
 
 ### API Breaking

rpc/apis.go

@@ -34,6 +34,23 @@ func GetAPIs(clientCtx context.CLIContext, selectedApis []string, keys ...ethsec
 
 var apis []rpc.API
 
+apis = append(apis,
+rpc.API{
+Namespace: EthNamespace,
+Version: apiVersion,
+Service: ethAPI,
+Public: true,
+},
+)
+apis = append(apis,
+rpc.API{
+Namespace: EthNamespace,
+Version: apiVersion,
+Service: filters.NewAPI(clientCtx, backend),
+Public: true,
+},
+)
+
 for _, api := range selectedApis {
 switch api {
 case Web3Namespace:
@@ -45,23 +62,6 @@ func GetAPIs(clientCtx context.CLIContext, selectedApis []string, keys ...ethsec
 Public: true,
 },
 )
-case EthNamespace:
-apis = append(apis,
-rpc.API{
-Namespace: EthNamespace,
-Version: apiVersion,
-Service: ethAPI,
-Public: true,
-},
-)
-apis = append(apis,
-rpc.API{
-Namespace: EthNamespace,
-Version: apiVersion,
-Service: filters.NewAPI(clientCtx, backend),
-Public: true,
-},
-)
 case PersonalNamespace:
 apis = append(apis,
 rpc.API{