Update tenant-gate.ts

src/core/tenant-gate.ts

@@ -15,4 +15,14 @@ export class AllowAllTenantGate implements TenantGate {
   public async isTenant(_did: string): Promise<boolean> {
     return true;
   }
-}
+}
+/**
+ * A tenant gate that returns the value of externalTenantCheck, which requires a custom tenant checking function.
+ */
+export class ExternalTenantGate implements TenantGate {
+  constructor(private externalTenantCheck: Function) {}
+  public async isTenant(did: string): Promise<boolean> {
+    const tenantCheck = await this.externalTenantCheck(did);
+    return tenantCheck;
+  }
+}