Added ago timers

packages/common/src/feed.ts

@@ -1,5 +1,5 @@
 import { Opaque } from './helpers';
-import { NodeId, NodeDetails, NodeStats, BlockNumber, BlockDetails } from './types';
+import { NodeId, NodeDetails, NodeStats, BlockNumber, BlockDetails, Timestamp } from './types';
 
 export const Actions = {
     BestBlock: 0 as 0,
@@ -7,6 +7,7 @@ export const Actions = {
     RemovedNode: 2 as 2,
     ImportedBlock: 3 as 3,
     NodeStats: 4 as 4,
+    TimeSync: 5 as 5,
 };
 
 export type Action = typeof Actions[keyof typeof Actions];
@@ -19,7 +20,7 @@ export namespace Variants {
 
     export interface BestBlockMessage extends MessageBase {
         action: typeof Actions.BestBlock;
-        payload: BlockNumber;
+        payload: [BlockNumber, Timestamp];
     }
 
     export interface AddedNodeMessage extends MessageBase {
@@ -40,7 +41,12 @@ export namespace Variants {
     export interface NodeStatsMessage extends MessageBase {
         action: typeof Actions.NodeStats;
         payload: [NodeId, NodeStats];
-    };
+    }
+
+    export interface TimeSyncMessage extends MessageBase {
+        action: typeof Actions.TimeSync;
+        payload: Timestamp;
+    }
 }
 
 export type Message =
@@ -48,7 +54,8 @@ export type Message =
     | Variants.AddedNodeMessage
     | Variants.RemovedNodeMessage
     | Variants.ImportedBlockMessage
-    | Variants.NodeStatsMessage;
+    | Variants.NodeStatsMessage
+    | Variants.TimeSyncMessage;
 
 /**
  * Opaque data type to be sent to the feed. Passing through

packages/common/src/helpers.ts

@@ -1,10 +1,10 @@
-import { Milliseconds } from './types';
+import { Milliseconds, Timestamp } from './types';
 
 /**
  * PhantomData akin to Rust, because sometimes you need to be smarter than
  * the compiler.
  */
-export abstract class PhantomData<P> { private __PHANTOM__: P }
+export abstract class PhantomData<P> { public __PHANTOM__: P }
 
 /**
  * Opaque type, similar to `opaque type` in Flow, or new types in Rust/C.
@@ -31,3 +31,5 @@ export function sleep(time: Milliseconds): Promise<void> {
         setTimeout(() => resolve(), time);
     });
 }
+
+export const timestamp = Date.now as () => Timestamp;

packages/common/src/types.ts

@@ -9,9 +9,10 @@ export type NodeVersion = Opaque<string, 'NodeVersion'>;
 export type BlockNumber = Opaque<number, 'BlockNumber'>;
 export type BlockHash = Opaque<string, 'BlockHash'>;
 export type Milliseconds = Opaque<number, 'Milliseconds'>;
+export type Timestamp = Opaque<Milliseconds, 'Timestamp'>;
 export type PeerCount = Opaque<number, 'PeerCount'>;
 export type TransactionCount = Opaque<number, 'TransactionCount'>;
 
-export type BlockDetails = [BlockNumber, BlockHash, Milliseconds];
+export type BlockDetails = [BlockNumber, BlockHash, Milliseconds, Timestamp];
 export type NodeDetails = [NodeName, NodeImplementation, NodeVersion];
 export type NodeStats = [PeerCount, TransactionCount];