fallback to davinci if keys are there

src/chatgpt/chatgpt.service.ts

@@ -30,7 +30,10 @@ export class ChatgptService extends ConsoleLogger {
       previousConversation?.account,
       failedAccounts,
     );
-    if (!account) {
+    if (
+      !account ||
+      (failedAccounts.length > 1 && (await this.davinciService.isAvailable()))
+    ) {
       /*throw new BlankReturnMessageDto(
         500,
         'No available accounts',

src/davinci/davinci.service.ts

@@ -16,6 +16,15 @@ export class DavinciService extends ConsoleLogger implements OnModuleInit {
     this.ChatGPTApiConstructor = ChatGPTAPI;
   }
 
+  private _isAvailable = false;
+  async isAvailable() {
+    if (this._isAvailable) return true;
+    const keys = await this.keyProvider.get();
+    if (!keys.length) return false;
+    this._isAvailable = true;
+    return true;
+  }
+
   private pointer = 0;
   private async getKey(exclude: string[] = []) {
     const excludeSet = new Set(exclude);