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+---
+title: Fix VNAppMob gold price key parsing
+description: >-
+  The /api/request_api_key endpoint returns the JWT inside a JSON object
+  {"results":"<jwt>"}, but the client was sending the whole JSON object as the
+  Bearer token, causing SJC requests to fail with 403 "Invalid header padding".
+status: completed
+priority: P1
+branch: main
+tags:
+  - gold
+  - vnappmob
+  - bugfix
+  - api-key
+blockedBy: []
+blocks: []
+created: '2026-06-15T04:45:00Z'
+createdBy: opencode
+---
+
+# Fix VNAppMob gold price key parsing
+
+## Root cause
+
+`VNAppMobClient.refreshKeyLocked` reads the response body from
+`GET /api/request_api_key?scope=gold` and tries to handle either a raw JWT or a
+JSON-quoted string. The live endpoint actually returns:
+
+```json
+{"results":"eyJhbGciOiJIUzI1NiIs..."}
+```
+
+Because `json.Unmarshal` into a plain `string` fails for an object, the code
+falls back to using the entire JSON object (including braces and quotes) as the
+token. The subsequent `Authorization: Bearer {"results":...}` header is rejected
+by `/api/v2/gold/sjc` with `403 - Forbidden: Auth Error: Invalid header padding`,
+so all `/gold_price` requests fail with "Could not fetch gold price".
+
+## Fix
+
+1. Parse the refresh response as `struct{ Results string }` first.
+2. Fall back to raw body / JSON-quoted string for backward compatibility.
+3. Update tests to exercise the JSON-object response format.
+
+## Phases
+
+| Phase | Name | Status |
+|-------|------|--------|
+| 1 | Parse JSON object wrapper in refresh response | Completed |
+| 2 | Add unit tests for object-format token | Completed |
+| 3 | Run unit tests and live smoke test | Completed |
+| 4 | Code review and docs update | Completed |
+
+## Files
+
+- `internal/modules/gold/vnappmob_client.go`
+- `internal/modules/gold/vnappmob_client_test.go`
+
+## Success criteria
+
+- `/gold_price` returns live SJC buy/sell prices.
+- Existing unit tests still pass.
+- New test covers the `{"results":"<jwt>"}` response shape.