{
  "description": "Invalid inputs that implementations MUST reject (PROTOCOL.md sections 2, 5, 7)",
  "valid_channel_id": "TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3",
  "identity": {
    "description": "Invalid channel IDs that parse_channel_id MUST reject",
    "cases": [
      {
        "name": "wrong version prefix (0x0000 instead of 0x1433)",
        "channel_id": "11FVen3X669xLzsi6N2V91DoiyzHzg1uAgqiT8jZ9nS96Z",
        "error": "wrong_version_prefix"
      },
      {
        "name": "too short (18 bytes payload, not 34)",
        "channel_id": "HKfHb5mVXWZoTX8o77GnDgnLMoV",
        "error": "wrong_length"
      },
      {
        "name": "invalid base58 character (0 is not in base58 alphabet)",
        "channel_id": "TV0InvalidBase58WithZeroChar",
        "error": "invalid_base58"
      },
      {
        "name": "invalid base58 character (O is not in base58 alphabet)",
        "channel_id": "TVOanotherInvalidBase58String",
        "error": "invalid_base58"
      },
      {
        "name": "invalid base58 character (l is not in base58 alphabet)",
        "channel_id": "TVlowercaseLinvalidBase58Str",
        "error": "invalid_base58"
      },
      {
        "name": "invalid base58 character (I is not in base58 alphabet)",
        "channel_id": "TVIuppercaseIinvalidBase58St",
        "error": "invalid_base58"
      },
      {
        "name": "empty string",
        "channel_id": "",
        "error": "invalid_base58"
      }
    ]
  },
  "verification": {
    "description": "Signed documents that verify_document MUST reject",
    "cases": [
      {
        "name": "tampered name field (signature no longer valid)",
        "document": {
          "v": 1,
          "seq": 1742000000,
          "id": "TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3",
          "name": "TAMPERED NAME",
          "description": "A test channel for protocol verification",
          "stream": "/tltv/v1/channels/TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3/stream.m3u8",
          "guide": "/tltv/v1/channels/TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3/guide.json",
          "access": "public",
          "updated": "2026-03-14T12:00:00Z",
          "signature": "2TgRpS4h1UREKn3rRGk3cMRQ9fXQZ2TYX76oWCkHnDbHmUm2hTNAcXy8nSphcFVwareooGM2hqwvWgoGigaCNaob"
        },
        "error": "invalid_signature"
      },
      {
        "name": "missing signature field",
        "document": {
          "v": 1,
          "seq": 1742000000,
          "id": "TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3",
          "name": "Test Channel",
          "description": "A test channel for protocol verification",
          "stream": "/tltv/v1/channels/TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3/stream.m3u8",
          "guide": "/tltv/v1/channels/TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3/guide.json",
          "access": "public",
          "updated": "2026-03-14T12:00:00Z"
        },
        "error": "missing_signature"
      },
      {
        "name": "identity binding failure (id field does not match expected channel)",
        "document": {
          "v": 1,
          "seq": 1742000000,
          "id": "TVsomeOtherChannelIdThatDoesNotMatchExpected1234",
          "name": "Test Channel",
          "stream": "/tltv/v1/channels/TVsomeOtherChannelIdThatDoesNotMatchExpected1234/stream.m3u8",
          "access": "public",
          "updated": "2026-03-14T12:00:00Z",
          "signature": "4ga7qsWoJmM4dp8t8YbQoaCHFXAYpRCxfMmkz1s2UaC55quqV9pioXfnGRkxGhzcLZVRgYFr5bKV6F8oJV9U2esc"
        },
        "verify_against_channel_id": "TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3",
        "error": "identity_binding_mismatch"
      },
      {
        "name": "truncated signature (not 64 bytes)",
        "document": {
          "v": 1,
          "seq": 1742000000,
          "id": "TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3",
          "name": "Test Channel",
          "stream": "/tltv/v1/channels/TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3/stream.m3u8",
          "access": "public",
          "updated": "2026-03-14T12:00:00Z",
          "signature": "2TgRpS4h1URE"
        },
        "error": "invalid_signature_length"
      }
    ]
  }
}