{
  "description": "Golden signature test cases - DO NOT MODIFY unless algorithm changes",
  "algorithm": "HMAC-SHA256",
  "format": "v1,base64(HMAC-SHA256(id.timestamp.payload, secret))",
  "testCases": [
    {
      "name": "simple payload",
      "id": "msg_test_001",
      "timestamp": "1700000000",
      "payload": "{\"test\":\"data\"}",
      "secret": "test-secret",
      "expectedSignature": "v1,4Fay6rvxXDEbH+4oA1fYP2BR/Bwzn3/7ONj40iJQagY="
    },
    {
      "name": "unicode payload",
      "id": "msg_test_002",
      "timestamp": "1700000001",
      "payload": "{\"message\":\"Hello World\"}",
      "secret": "unicode-secret-key",
      "expectedSignature": "v1,ICmAFUlesRqIFA44bU6Wlce5GszoHjG+w7nurcu5EWc="
    },
    {
      "name": "complex nested payload",
      "id": "msg_test_003",
      "timestamp": "1700000002",
      "payload": "{\"nested\":{\"array\":[1,2,3],\"object\":{\"key\":\"value\"}}}",
      "secret": "complex-secret",
      "expectedSignature": "v1,Vx/pw0yOiRRoxdfifaZ3zBKt4B3KkRKFVr6gLQNJs9Q="
    },
    {
      "name": "empty data object",
      "id": "msg_test_004",
      "timestamp": "1700000003",
      "payload": "{\"data\":{}}",
      "secret": "empty-data-secret",
      "expectedSignature": "v1,IbLtu+G65OH8Gw7ZFqy38ru+Jrg96yWfueYMMdaFYs0="
    },
    {
      "name": "special characters in secret",
      "id": "msg_test_005",
      "timestamp": "1700000004",
      "payload": "{\"test\":true}",
      "secret": "secret!@#$%^&*()",
      "expectedSignature": "v1,kUvMXJ0rouLoROxY70WIzV+zLQGpSRuCXv8evLTPjXg="
    }
  ]
}