Change custom network typing

common/reducers/config/networks/customNetworks.ts

@@ -7,12 +7,10 @@ import {
 import { CustomNetworkConfig } from 'reducers/config/networks/typings';
 
 // TODO: this doesn't accurately represent state, as
-interface State1 {
+export interface State {
   [customNetworkId: string]: CustomNetworkConfig;
 }
 
-export type State = Partial<State1>;
-
 const addCustomNetwork = (state: State, { payload }: AddCustomNetworkAction): State => ({
   ...state,
   [payload.id]: payload.config

common/selectors/config/networks.ts

@@ -35,7 +35,7 @@ export const getNetworkContracts = (state: AppState): NetworkContract[] | null =
   return network ? network.contracts : [];
 };
 
-export const getCustomNetworkConfigs = (state: AppState): (CustomNetworkConfig | undefined)[] => {
+export const getCustomNetworkConfigs = (state: AppState): CustomNetworkConfig[] => {
   const { customNetworks } = getNetworks(state);
   return Object.values(customNetworks);
 };