[enh] Add commonTime in block query

src/gva.ts

@@ -25,7 +25,7 @@ export type IFieldContext = {
 export function plugModule(server: Server, logger?: any) {
   logger = logger || logger_1.NewLogger();
 
-  const schemaFile = path.join(__dirname, 'schema.graphqls');
+  const schemaFile = path.join(__dirname, 'schema.graphql');
   const typeDefs = fs.readFileSync(schemaFile, 'utf8');
 
   return makeExecutableSchema({
@@ -55,11 +55,18 @@ export function plugModule(server: Server, logger?: any) {
         blockchainParameters: () => server.dal.getParameters(),
 
         block: async (_, { number }: { number?: number }) => {
-          if (number !== undefined) {
-            return server.dal.getBlock(number)
-          }
-          const b = await server.dal.getCurrentBlockOrNull()
-          return b
+          const block = (number !== undefined) ?
+              await server.dal.getBlock(number) :
+              await server.dal.getCurrentBlockOrNull();
+          if (!block) return null;
+          return {
+            ...block,
+            // TODO make sure this is the final RFC name
+            commonTime: async () => {
+              const parameters = await server.dal.getParameters();
+              return parameters && (block.medianTime + (parameters.avgGenTime * parameters.medianTimeBlocks / 2)) || null;
+            }
+          } || null;
         },
 
         member: async (_, { uid, pub }: { uid: string, pub: string }) => {

src/types.ts

-export declare interface BlockRef {
+export declare class Block {
   number: number;
   // Block hash
   hash: string;
@@ -9,6 +9,10 @@ export declare interface BlockRef {
   // Block median time
   medianTime: number;
 
-  // = median time + (avgGenTime * medianTime / 2)
-  userTime: number;
+  // commonTime = medianTime + (avgGenTime * medianTimeBlocks / 2)
+  // TODO check the RFC final name
+  commonTime: number;
+
+  // TODO: check if define in the RFC
+  issuerName: string;
 }