InterfaceTypes -> keyof InterfaceRegistry (#1928)

* InterfaceTypes -> keyof InterfaceRegistry

* Renames

packages/jsonrpc/src/create/param.ts

@@ -10,7 +10,7 @@ interface RpcParamOptions {
 }
 
 /** @internal */
-export default function createParam (name: string, type: InterfaceTypes, { isOptional = false }: RpcParamOptions = { isOptional: false }): RpcParam {
+export default function createParam (name: string, type: keyof InterfaceTypes, { isOptional = false }: RpcParamOptions = { isOptional: false }): RpcParam {
   return {
     isOptional,
     name,

packages/jsonrpc/src/state.ts

@@ -85,7 +85,7 @@ const getMetadata: RpcMethodOpt = {
   params: [
     createParam('at', 'BlockHash', { isOptional: true })
   ],
-  // This is not part of InterfaceTypes
+  // This is not part of keyof InterfaceTypes
   type: 'Metadata' as any
 };
 

packages/jsonrpc/src/types.ts

@@ -9,7 +9,7 @@ type PubSub = [string, string, string];
 export interface RpcParam {
   isOptional: boolean;
   name: string;
-  type: InterfaceTypes;
+  type: keyof InterfaceTypes;
 }
 
 export interface RpcMethodOpt {
@@ -21,7 +21,7 @@ export interface RpcMethodOpt {
   isSubscription?: boolean;
   params: RpcParam[];
   pubsub?: PubSub;
-  type: InterfaceTypes;
+  type: keyof InterfaceTypes;
 }
 
 export interface RpcMethod {
@@ -36,7 +36,7 @@ export interface RpcMethod {
   params: RpcParam[];
   pubsub: PubSub;
   section: string;
-  type: InterfaceTypes;
+  type: keyof InterfaceTypes;
 }
 
 export interface RpcSection {