feat(center-nodes): add node heartbeat endpoint

Fabric.Backend.Center/src/nodes/nodes.controller.ts

@@ -65,6 +65,27 @@ export class NodesController {
     };
   }
 
+  @Post(':nodeId/heartbeat')
+  async heartbeat(@Param('nodeId') nodeId: string) {
+    const node = await this.nodeRepo.findOne({ where: { nodeId } });
+    if (!node) {
+      throw new NotFoundException('node not found');
+    }
+
+    node.lastHeartbeatAt = new Date();
+    if (node.status !== 'revoked') {
+      node.status = 'active';
+    }
+
+    const saved = await this.nodeRepo.save(node);
+    return {
+      status: 'ok',
+      nodeId: saved.nodeId,
+      nodeStatus: saved.status,
+      lastHeartbeatAt: saved.lastHeartbeatAt,
+    };
+  }
+
   @Patch(':nodeId/status')
   async updateStatus(
     @Param('nodeId') nodeId: string,