Add re-registration request in case of timeouts

packages/backrpc/src/client.ts

@@ -48,6 +48,8 @@ export class BackRPCClient<ClientT extends string = ClientId> {
 
   stopTick?: () => void
 
+  lastPong: number = 0
+
   constructor (
     readonly clientId: ClientT,
     readonly client: BackRPCClientHandler,
@@ -190,6 +192,18 @@ export class BackRPCClient<ClientT extends string = ClientId> {
                 )
               })
             }
+            break
+          }
+          case backrpcOperations.pong: {
+            // Server it all fine
+            this.lastPong = this.tickMgr.now()
+            break
+          }
+          case backrpcOperations.askHello: {
+            // Server ask us to re-hello, probably because it has restarted
+            this.serverId = '' // Clear server id for re-register to be performed
+            await this.sendHello()
+            break
           }
         }
       } catch (err: any) {

packages/backrpc/src/server.ts

@@ -209,6 +209,9 @@ export class BackRPCServer<ClientT extends string = ClientId> {
             void this.doSend([clientId, backrpcOperations.pong, this.uuid, ''])
             if (client !== undefined) {
               this.handlers.onPing?.(client?.id)
+            } else {
+              // Ping from undefined client mean, we remove it because of inactivity, so we could ask for hello.
+              void this.doSend([clientId, backrpcOperations.askHello, this.uuid, ''])
             }
             break
           }

packages/backrpc/src/types.ts

@@ -7,7 +7,8 @@ export const backrpcOperations = {
   ping: 5,
   pong: 6,
   retry: 7,
-  close: 8
+  close: 8,
+  askHello: 9
 }
 
 export type ClientId = string & { __clientId: string }