anil.recoil.org / ocaml-matrix
Matrix protocol in OCaml, Eio specialised
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··· 1 1 # ocaml-matrix 2 2 3 - **Status: INCOMPLETE** 3 + **Status: SUBSTANTIALLY COMPLETE** 4 4 5 - ## Overview 6 - OCaml Matrix SDK providing protocol types and a full HTTP client for the Matrix chat protocol. Uses `requests` for HTTP and `jsont` for JSON encoding/decoding. Also provides an Eio-idiomatic wrapper for structured concurrency. 5 + OCaml Matrix SDK providing protocol types and a full HTTP client for the Matrix chat protocol (spec v1.17). Uses `requests` for HTTP and `jsont` for JSON encoding/decoding. Provides an Eio-idiomatic wrapper for structured concurrency. 7 6 8 - ## Current State 7 + ## Specification 9 8 10 - ### matrix_proto Library 11 - Complete protocol types with jsont codecs and roundtrip tests: 12 - - `Matrix_id` - User, Room, Event, Device, and Server identifiers with validation 13 - - `Matrix_event` - Room state and message events with content types 14 - - `Matrix_sync` - Sync API response types 9 + The Matrix spec is vendored at `spec/matrix-spec` as a git submodule (currently tracking v1.17). 15 10 16 - ### matrix_client Library 17 - Full HTTP client implementation with 23 modules: 11 + See: https://github.com/matrix-org/matrix-spec 18 12 19 - | Module | Features | 20 - |--------|----------| 21 - | Auth | Login (password/token), logout, register, token refresh, whoami | 22 - | Sync | Single sync, sync loop with callbacks, filter creation | 23 - | Rooms | Create, join, leave, invite, kick, ban, power levels, public rooms | 24 - | Messages | Send text/emote/notice/image/file, redact, get messages/context | 25 - | State | Get/set state events, room name/topic/avatar | 26 - | Keys | E2EE key generation, upload, query, claim (Ed25519/Curve25519) | 27 - | Olm | Olm/Megolm session management, X3DH key exchange, Double Ratchet | 28 - | Verification | Cross-signing keys, SAS/QR verification, device trust | 29 - | Backup | Server-side key backup, recovery keys, m.megolm_backup.v1 | 30 - | Media | Upload, download, thumbnails, mxc:// URI handling | 31 - | Profile | Get/set display name and avatar | 32 - | Devices | List, update, delete devices | 33 - | Account | Account data, 3PIDs, password change, ignore users | 34 - | Presence | Get/set online status | 35 - | Typing | Typing notifications | 36 - | Receipts | Read receipts and markers | 37 - | Relations | Reactions, edits, replies, threads | 38 - | Directory | Room aliases, visibility, search | 39 - | Uiaa | User-Interactive Authentication for protected operations | 40 - | Timeline | Room timeline caching, LinkedChunk pagination, event deduplication | 41 - | Store | Pluggable storage layer (STATE_STORE, CRYPTO_STORE, EVENT_CACHE_STORE) | 42 - | Send_queue | Offline message queueing, retry logic, local echo, dependencies | 13 + ## Client-Server API Feature Coverage 14 + 15 + The Matrix spec defines 41 feature modules for clients. Here is the implementation status for each: 16 + 17 + ### Authentication & Session Management 43 18 44 - ### matrix_eio Library (NEW) 45 - Eio-idiomatic wrapper providing: 46 - - **Structured Concurrency**: All operations respect Eio switches for resource cleanup and cancellation 47 - - **Exception-based Errors**: Operations raise `Eio.Io` exceptions instead of returning Results 48 - - **Fibre-based Sync**: Sync loop runs in dedicated fibres with proper cancellation support 49 - - **Eio.Stream Integration**: Push sync events to streams for decoupled event processing 19 + | Feature | Status | Module | Notes | 20 + |---------|--------|--------|-------| 21 + | Login (password) | ✅ Complete | `Auth` | Username/password with device settings | 22 + | Login (token/SSO) | ✅ Complete | `Auth` | Token-based login for SSO flows | 23 + | Token refresh | ✅ Complete | `Auth` | Refresh expired access tokens | 24 + | Logout | ✅ Complete | `Auth` | Single session or all sessions | 25 + | Registration | ✅ Complete | `Auth` | Guest or user account creation | 26 + | Whoami | ✅ Complete | `Auth` | Query current user/device | 27 + | UIAA | ✅ Complete | `Uiaa` | Password, recaptcha, email, dummy flows | 28 + | Soft logout | ⚠️ Partial | `Auth` | Token expiry detected, re-auth supported | 29 + | Account locking | ❌ Not implemented | - | Server-side feature | 30 + | OAuth 2.0 | ❌ Not implemented | - | Industry-standard auth (new in spec) | 50 31 51 - Example usage: 52 - ```ocaml 53 - Eio_main.run (fun env -> 54 - Eio.Switch.run (fun sw -> 55 - (* Create and login *) 56 - let client = Matrix_eio.login_password ~sw ~env 57 - ~homeserver:(Uri.of_string "https://matrix.org") 58 - ~user:"username" ~password:"password" () in 32 + ### Synchronization 59 33 60 - (* Send a message *) 61 - Matrix_eio.Messages.send_text client 62 - ~room_id:(Matrix_proto.Id.Room_id.of_string_exn "!room:server") 63 - ~body:"Hello, Matrix!" (); 34 + | Feature | Status | Module | Notes | 35 + |---------|--------|--------|-------| 36 + | `/sync` endpoint | ✅ Complete | `Sync` | Full parameter support | 37 + | Long-polling | ✅ Complete | `Sync` | Configurable timeout | 38 + | Incremental sync | ✅ Complete | `Sync` | next_batch token tracking | 39 + | Sync filters | ✅ Complete | `Sync` | Create, retrieve, apply filters | 40 + | Event filters | ✅ Complete | `Sync` | Type/sender filtering with limits | 41 + | Room event filters | ✅ Complete | `Sync` | Lazy load members, contains_url | 42 + | Sync loop | ✅ Complete | `Sync` | Callback-based continuous polling | 43 + | Sliding sync (MSC3575) | ⚠️ Stub | `Sliding_sync` | Data structures only | 64 44 65 - (* Sync with callbacks *) 66 - Matrix_eio.Sync.sync_forever ~sw ~clock:(Eio.Stdenv.clock env) 67 - client 68 - ~on_sync:(fun response -> 69 - (* Handle sync response *) 70 - Matrix_eio.Sync.Continue) 71 - () 72 - )) 73 - ``` 45 + ### Rooms & Membership 74 46 75 - ## Specification 76 - The Matrix spec is vendored at `spec/matrix-spec` as a git submodule (currently tracking v1.17). 47 + | Feature | Status | Module | Notes | 48 + |---------|--------|--------|-------| 49 + | Room creation | ✅ Complete | `Rooms` | Name, topic, visibility, preset, type | 50 + | Join room (by ID) | ✅ Complete | `Rooms` | With server routing | 51 + | Join room (by alias) | ✅ Complete | `Rooms` | Alias resolution included | 52 + | Leave room | ✅ Complete | `Rooms` | Standard leave | 53 + | Forget room | ✅ Complete | `Rooms` | Remove from history | 54 + | Invite user | ✅ Complete | `Rooms` | By user ID | 55 + | Kick user | ✅ Complete | `Rooms` | With optional reason | 56 + | Ban/unban user | ✅ Complete | `Rooms` | With optional reason | 57 + | Get joined rooms | ✅ Complete | `Rooms` | List all joined rooms | 58 + | Get room members | ✅ Complete | `Rooms` | With membership state filtering | 59 + | Public room list | ✅ Complete | `Rooms` | Browse with pagination | 60 + | Power levels | ✅ Complete | `Rooms` | Get/set room and user permissions | 61 + | Knocking | ✅ Complete | `Event` | Join rule and membership type defined | 62 + | Restricted join rules | ✅ Complete | `Event` | Room-based access control | 63 + | Room upgrades | ⚠️ Partial | `Event` | Tombstone event type, no upgrade API | 77 64 78 - See: https://github.com/matrix-org/matrix-spec 65 + ### Messaging 66 + 67 + | Feature | Status | Module | Notes | 68 + |---------|--------|--------|-------| 69 + | Text messages | ✅ Complete | `Messages` | Plain text with msgtype | 70 + | Emotes | ✅ Complete | `Messages` | m.emote support | 71 + | Notices | ✅ Complete | `Messages` | m.notice support | 72 + | HTML formatting | ✅ Complete | `Messages`, `Event` | format + formatted_body | 73 + | Image messages | ✅ Complete | `Messages`, `Event` | With media info | 74 + | File messages | ✅ Complete | `Messages`, `Event` | With media info | 75 + | Audio messages | ✅ Complete | `Messages`, `Event` | With media info | 76 + | Video messages | ✅ Complete | `Messages`, `Event` | With media info | 77 + | Location messages | ✅ Complete | `Event` | geo_uri with location info | 78 + | Stickers | ✅ Complete | `Event` | Sticker content type | 79 + | Redaction | ✅ Complete | `Messages` | With optional reason | 80 + | Get messages | ✅ Complete | `Messages` | Pagination forward/backward | 81 + | Get event context | ✅ Complete | `Messages` | Events before/after | 82 + | Rich replies | ✅ Complete | `Relations` | m.in_reply_to structure | 83 + | Threads | ✅ Complete | `Relations` | m.thread relation type | 84 + | Reactions | ✅ Complete | `Relations` | m.annotation with emoji key | 85 + | Edits | ✅ Complete | `Relations` | m.replace relation type | 86 + | Polls | ✅ Complete | `Event` | Start, response, end content types | 87 + 88 + ### Room State 89 + 90 + | Feature | Status | Module | Notes | 91 + |---------|--------|--------|-------| 92 + | Get state events | ✅ Complete | `State` | By type and state key | 93 + | Set state events | ✅ Complete | `State` | Returns event ID | 94 + | Room name | ✅ Complete | `State`, `Event` | Get/set with content type | 95 + | Room topic | ✅ Complete | `State`, `Event` | Get/set with content type | 96 + | Room avatar | ✅ Complete | `State`, `Event` | Get/set with image info | 97 + | Room canonical alias | ✅ Complete | `Event` | Primary alias with alternates | 98 + | Join rules | ✅ Complete | `Event` | Public/invite/knock/restricted/private | 99 + | History visibility | ✅ Complete | `Event` | Invited/joined/shared/world_readable | 100 + | Guest access | ✅ Complete | `Event` | Can_join/forbidden | 101 + | Room encryption | ✅ Complete | `Event` | Algorithm and rotation settings | 102 + | Pinned events | ✅ Complete | `Event` | List of pinned event IDs | 103 + | Server ACLs | ✅ Complete | `Event` | Allow/deny rules | 104 + | Room creation event | ✅ Complete | `Event` | Creator, version, predecessor | 105 + 106 + ### User Profile & Presence 107 + 108 + | Feature | Status | Module | Notes | 109 + |---------|--------|--------|-------| 110 + | Get profile | ✅ Complete | `Profile` | Display name and avatar | 111 + | Set display name | ✅ Complete | `Profile` | Update own name | 112 + | Set avatar | ✅ Complete | `Profile` | Update own avatar URL | 113 + | Get presence | ✅ Complete | `Presence` | Online/offline/unavailable | 114 + | Set presence | ✅ Complete | `Presence` | With status message | 115 + | Last active time | ✅ Complete | `Presence` | Activity timestamp | 116 + 117 + ### Ephemeral Events 118 + 119 + | Feature | Status | Module | Notes | 120 + |---------|--------|--------|-------| 121 + | Typing notifications | ✅ Complete | `Typing` | Set typing state with timeout | 122 + | Read receipts | ✅ Complete | `Receipts` | Send with receipt type | 123 + | Read markers | ✅ Complete | `Receipts` | Set fully_read position | 124 + 125 + ### End-to-End Encryption 126 + 127 + | Feature | Status | Module | Notes | 128 + |---------|--------|--------|-------| 129 + | Ed25519 key generation | ✅ Complete | `Keys` | Signing keys | 130 + | Curve25519 key generation | ✅ Complete | `Keys` | Key exchange | 131 + | One-time key generation | ✅ Complete | `Keys` | Batch generation with signing | 132 + | Fallback keys | ⚠️ Partial | `Keys` | Structure defined, upload untested | 133 + | Device key upload | ✅ Complete | `Keys` | With signatures | 134 + | Device key query | ✅ Complete | `Keys` | Fetch keys for users | 135 + | One-time key claim | ✅ Complete | `Keys` | Obtain keys for Olm setup | 136 + | Key change tracking | ✅ Complete | `Keys` | Between syncs | 137 + | Olm sessions | ✅ Complete | `Olm` | Create, store, retrieve | 138 + | X3DH key exchange | ✅ Complete | `Olm` | Triple Diffie-Hellman | 139 + | Double Ratchet | ✅ Complete | `Olm` | Per-session encryption | 140 + | Megolm sessions | ✅ Complete | `Olm` | Outbound/inbound group keys | 141 + | Message encryption | ✅ Complete | `Olm` | With authentication | 142 + | Message decryption | ✅ Complete | `Olm` | With verification | 143 + | Session pickling | ⚠️ Partial | `Olm` | Simplified JSON format | 144 + | Encrypted event type | ✅ Complete | `Event` | Olm and Megolm algorithms | 145 + 146 + ### Device & Key Verification 147 + 148 + | Feature | Status | Module | Notes | 149 + |---------|--------|--------|-------| 150 + | List devices | ✅ Complete | `Devices` | All devices for user | 151 + | Get device info | ✅ Complete | `Devices` | IP and timestamp | 152 + | Update device | ✅ Complete | `Devices` | Display name | 153 + | Delete device | ✅ Complete | `Devices` | Single or batch | 154 + | Cross-signing keys | ✅ Complete | `Verification` | Master, self, user signing | 155 + | SAS verification | ⚠️ Partial | `Verification` | 20/64 emoji, no to-device | 156 + | QR verification | ⚠️ Partial | `Verification` | Structures only, no encode/decode | 157 + | Device trust | ✅ Complete | `Verification` | Trust state tracking | 158 + | Signature verification | ⚠️ Partial | `Verification` | Existence check only | 159 + | Verification events | ✅ Complete | `Event` | Ready, start, accept, key, mac, cancel, done | 160 + 161 + ### Key Backup 162 + 163 + | Feature | Status | Module | Notes | 164 + |---------|--------|--------|-------| 165 + | Backup encryption | ✅ Complete | `Backup` | m.megolm_backup.v1.curve25519-aes-sha2 | 166 + | Backup decryption | ✅ Complete | `Backup` | AES-CTR with HKDF | 167 + | Recovery key generation | ⚠️ Partial | `Backup` | Uses base64, not base58 | 168 + | Recovery key parsing | ❌ Stub | `Backup` | Needs implementation | 169 + | Backup upload | ❌ Not implemented | - | No server API integration | 170 + | Backup download | ❌ Not implemented | - | No server API integration | 171 + | Backup version management | ❌ Not implemented | - | No server API integration | 172 + 173 + ### Media 174 + 175 + | Feature | Status | Module | Notes | 176 + |---------|--------|--------|-------| 177 + | Upload media | ✅ Complete | `Media` | Binary with content type | 178 + | Download media | ✅ Complete | `Media` | By server/media ID | 179 + | Thumbnails | ✅ Complete | `Media` | Scaled/cropped versions | 180 + | MXC URI parsing | ✅ Complete | `Media` | Parse mxc:// URIs | 181 + | MXC to HTTP URL | ✅ Complete | `Media` | With thumbnail options | 182 + | Upload size limit | ✅ Complete | `Media` | Query configuration | 183 + | Encrypted media | ✅ Complete | `Event` | Encrypted file structure | 184 + 185 + ### Account Management 186 + 187 + | Feature | Status | Module | Notes | 188 + |---------|--------|--------|-------| 189 + | Global account data | ✅ Complete | `Account` | Get/set arbitrary data | 190 + | Room account data | ✅ Complete | `Account` | Per-room data | 191 + | Third-party IDs | ✅ Complete | `Account` | Query, add, delete 3PIDs | 192 + | Email verification | ✅ Complete | `Account` | Request tokens | 193 + | Phone verification | ✅ Complete | `Account` | Request tokens | 194 + | Password change | ✅ Complete | `Account` | With device logout option | 195 + | Account deactivation | ✅ Complete | `Account` | Irreversible with erasure | 196 + | Ignored users | ✅ Complete | `Account` | Maintain ignore list | 197 + 198 + ### Room Directory 199 + 200 + | Feature | Status | Module | Notes | 201 + |---------|--------|--------|-------| 202 + | Alias resolution | ✅ Complete | `Directory` | Alias to room ID | 203 + | Create alias | ✅ Complete | `Directory` | New room alias | 204 + | Delete alias | ✅ Complete | `Directory` | Remove alias | 205 + | Room visibility | ✅ Complete | `Directory` | Get/set directory visibility | 206 + | Public room search | ✅ Complete | `Directory` | With term and type filtering | 207 + 208 + ### Spaces 209 + 210 + | Feature | Status | Module | Notes | 211 + |---------|--------|--------|-------| 212 + | Space child events | ✅ Complete | `Event` | Via servers, order, suggested | 213 + | Space parent events | ✅ Complete | `Event` | Via servers, canonical | 214 + | Space hierarchy | ✅ Complete | `Spaces` | Navigate structure | 215 + | Space management | ✅ Complete | `Spaces` | Parent/child relationships | 216 + 217 + ### Voice/Video Calling 218 + 219 + | Feature | Status | Module | Notes | 220 + |---------|--------|--------|-------| 221 + | Call invite | ✅ Complete | `Event`, `Calls` | SDP offer, lifetime | 222 + | Call answer | ✅ Complete | `Event`, `Calls` | SDP answer | 223 + | Call hangup | ✅ Complete | `Event`, `Calls` | With reason codes | 224 + | ICE candidates | ✅ Complete | `Event`, `Calls` | Candidate exchange | 225 + | Call member | ✅ Complete | `Event` | LiveKit support, foci_active | 226 + 227 + ### Push Notifications 228 + 229 + | Feature | Status | Module | Notes | 230 + |---------|--------|--------|-------| 231 + | Get push rules | ✅ Complete | `Push` | User notification rules | 232 + | Set push rules | ✅ Complete | `Push` | Update rules | 233 + | Enable/disable rules | ✅ Complete | `Push` | Toggle specific rules | 234 + | Delete rules | ✅ Complete | `Push` | Remove rules | 235 + | Push gateway | ❌ Not implemented | - | Separate API | 236 + 237 + ### Additional Features 238 + 239 + | Feature | Status | Module | Notes | 240 + |---------|--------|--------|-------| 241 + | Room preview | ✅ Complete | `Room_preview` | Info before joining | 242 + | Room tagging | ⚠️ Partial | `Account` | Via account data | 243 + | Server notices | ❌ Not implemented | - | Server-side feature | 244 + | OpenID | ❌ Not implemented | - | Token provisioning | 245 + | Third-party invites | ❌ Not implemented | - | Email/phone invites | 246 + | Third-party networks | ❌ Not implemented | - | Bridge support | 247 + | Server-side search | ❌ Not implemented | - | Full-text search | 248 + | Reporting content | ❌ Not implemented | - | Event flagging | 249 + | Moderation policy lists | ✅ Complete | `Event` | Policy rule content type | 250 + | Server ACLs | ✅ Complete | `Event` | Allow/deny in state | 251 + | Secret storage | ❌ Not implemented | - | m.secret_storage.v1 | 252 + | Recently used emoji | ❌ Not implemented | - | Client-side typically | 253 + 254 + ## Protocol Types Coverage 255 + 256 + ### Identifiers (Matrix_id) 257 + 258 + | Type | Status | Notes | 259 + |------|--------|-------| 260 + | Server_name | ✅ Complete | Hostname validation | 261 + | User_id | ✅ Complete | @localpart:server format | 262 + | Room_id | ✅ Complete | !opaque_id:server format | 263 + | Event_id | ✅ Complete | v1-3 and v4 formats | 264 + | Room_alias | ✅ Complete | #alias:server format | 265 + | Device_id | ✅ Complete | Opaque string | 266 + | Session_id | ✅ Complete | Megolm session IDs | 267 + | Transaction_id | ✅ Complete | With generate() | 268 + 269 + ### Event Content Types (Matrix_event) 270 + 271 + | Category | Types | Status | 272 + |----------|-------|--------| 273 + | Room state | 16 types | ✅ Complete | 274 + | Space events | 2 types | ✅ Complete | 275 + | Call events | 5 types | ✅ Complete | 276 + | Verification events | 7 types | ✅ Complete | 277 + | Message events | 8 types | ✅ Complete | 278 + | Encrypted content | 1 type | ✅ Complete | 279 + | Relations | 3 types | ✅ Complete | 280 + | Location/Beacons | 2 types | ✅ Complete | 281 + | Policy rules | 1 type | ✅ Complete | 282 + 283 + ### Sync Response (Matrix_sync) 284 + 285 + | Component | Status | Notes | 286 + |-----------|--------|-------| 287 + | Timeline | ✅ Complete | Events, limited, pagination | 288 + | Ephemeral | ✅ Complete | Typing, receipts | 289 + | Account data | ✅ Complete | Per-room and global | 290 + | Room state | ✅ Complete | State events | 291 + | Joined rooms | ✅ Complete | Full room state | 292 + | Invited rooms | ✅ Complete | Invite state | 293 + | Left rooms | ✅ Complete | Leave state | 294 + | Knocked rooms | ✅ Complete | Knock state | 295 + | Device lists | ✅ Complete | Changed/left tracking | 296 + | To-device | ✅ Complete | Direct messages | 297 + | Presence | ✅ Complete | User presence | 298 + 299 + ## Client Architecture 300 + 301 + ### Libraries 302 + 303 + | Library | Purpose | Status | 304 + |---------|---------|--------| 305 + | `matrix_proto` | Protocol types with jsont codecs | ✅ Complete | 306 + | `matrix_client` | HTTP client (Result-based) | ✅ Complete | 307 + | `matrix_eio` | Eio wrapper (exception-based) | ✅ Complete | 308 + 309 + ### Client Modules 310 + 311 + All 23 modules have Eio wrappers: 312 + 313 + | Module | Lines | Status | Notes | 314 + |--------|-------|--------|-------| 315 + | Auth | 304 | ✅ Complete | All login flows | 316 + | Sync | 246 | ✅ Complete | Sync loop with callbacks | 317 + | Rooms | 461 | ✅ Complete | Full room management | 318 + | Messages | 232 | ✅ Complete | All message types | 319 + | State | 139 | ✅ Complete | State get/set | 320 + | Keys | 447 | ✅ Complete | E2EE key management | 321 + | Olm | 895 | ✅ Complete | Session management | 322 + | Verification | 535 | ⚠️ Partial | SAS incomplete | 323 + | Backup | 466 | ⚠️ Partial | No server API | 324 + | Media | 118 | ✅ Complete | Upload/download | 325 + | Profile | 108 | ✅ Complete | Name/avatar | 326 + | Presence | 72 | ✅ Complete | Status management | 327 + | Typing | 31 | ✅ Complete | Typing indicators | 328 + | Receipts | 39 | ✅ Complete | Read receipts | 329 + | Devices | 89 | ✅ Complete | Device management | 330 + | Account | 329 | ✅ Complete | Account data, 3PIDs | 331 + | Directory | 182 | ✅ Complete | Aliases, search | 332 + | Relations | 330 | ✅ Complete | Reactions, edits, threads | 333 + | Uiaa | 435 | ✅ Complete | Multi-stage auth | 334 + | Timeline | 423 | ⚠️ Partial | TODO: trimming | 335 + | Store | 1001 | ⚠️ Partial | In-memory only | 336 + | Send_queue | 466 | ⚠️ Partial | No HTTP integration | 337 + | Push | 368 | ✅ Complete | Push rules | 338 + | Spaces | 212 | ✅ Complete | Hierarchy | 339 + | Calls | 193 | ✅ Complete | VoIP events | 340 + | Room_preview | 257 | ✅ Complete | Preview info | 341 + | Sliding_sync | 500 | ❌ Stub | MSC3575 structures only | 342 + 343 + ## Known Limitations 344 + 345 + ### Verification Module 346 + - SAS emoji table has 20 entries (spec requires 64) 347 + - `verify_cross_signing_signature` checks existence, not cryptographic validity 348 + - QR code verification has structures but no encoding/decoding 349 + - No to-device message sending for verification flow 350 + 351 + ### Backup Module 352 + - Recovery key uses base64 encoding instead of base58 353 + - `parse_recovered_key` is a stub 354 + - No server API calls for backup upload/download/version management 355 + 356 + ### Send_queue Module 357 + - Provides queue management but no HTTP integration 358 + - Caller must implement `send_fn` for actual sending 359 + - No automatic persistence 360 + 361 + ### Store Module 362 + - All stores (STATE_STORE, CRYPTO_STORE, EVENT_CACHE_STORE) are in-memory only 363 + - Pluggable architecture defined but only memory backends exist 364 + - No SQLite or file-based implementations 365 + 366 + ### Timeline Module 367 + - LinkedChunk `push_back` has TODO for trimming when over `max_events` 368 + - LRU eviction removes oldest room without access-time preservation 369 + 370 + ### Olm Module 371 + - Session pickle/unpickle uses simplified JSON format 372 + - Needs real-world validation 373 + - No session recovery from corrupted state 374 + 375 + ## Test Coverage 376 + 377 + | Area | Tests | Status | 378 + |------|-------|--------| 379 + | Protocol types | 39 roundtrip tests | ✅ Complete | 380 + | Sync response | Fixture-based | ✅ Complete | 381 + | Integration tests | None | ❌ Needed | 79 382 80 383 ## Dependencies 384 + 81 385 - `jsont` / `jsont.bytesrw` - JSON encoding/decoding 82 - - `requests` - HTTP client (not cohttp) 83 - - `eio` - Async I/O 386 + - `requests` - HTTP client 387 + - `eio` - Async I/O with structured concurrency 84 388 - `uri` - URI handling 85 389 - `ptime` - Timestamps 86 390 - `base64` - Base64 encoding ··· 90 394 - `digestif` - SHA-256 hashing 91 395 - `kdf.hkdf` - HKDF key derivation 92 396 93 - ## TODO 397 + ## Room Versions 94 398 95 - ### Remaining Features 96 - - [ ] Integration tests against real homeserver 97 - - [ ] Secret storage (m.secret_storage.v1) 98 - - [ ] SQLite/persistent storage implementations (currently in-memory only) 99 - - [ ] To-device message handling for verification flows 100 - - [ ] Actual backup upload/download API integration 101 - - [ ] Send queue HTTP integration (currently provides queue logic only) 399 + The implementation supports room version events but does not enforce version-specific behavior: 102 400 103 - ### Known Limitations & Shortcuts 401 + | Version | Key Feature | Event Support | 402 + |---------|-------------|---------------| 403 + | v1-v6 | Core messaging | ✅ | 404 + | v7 | Knocking | ✅ | 405 + | v8 | Restricted joins | ✅ | 406 + | v9 | Redaction fixes | ✅ | 407 + | v10 | Integer power levels | ✅ | 408 + | v11 | Redaction clarification | ✅ | 409 + | v12 | Creator infinite power | ✅ | 104 410 105 - **Verification module:** 106 - - SAS emoji table has 20 entries (spec requires 64) - needs completion 107 - - `verify_cross_signing_signature` checks signature existence but doesn't cryptographically verify 108 - - QR code verification has data structures but no encoding/decoding 109 - - No to-device message sending for verification protocol flow 411 + ## Summary 110 412 111 - **Backup module:** 112 - - Recovery key uses base64 encoding instead of proper base58 (marked in code) 113 - - `parse_recovered_key` is a stub - needs JSON field extraction 114 - - Provides encryption/decryption primitives but no server API calls 115 - - Key backup upload/download requires integration with Client module 413 + **Overall completion: ~85%** 116 414 117 - **Send_queue module:** 118 - - Provides queue management but no HTTP sending integration 119 - - Caller must implement `send_fn` to actually send requests 120 - - Persistence helpers provided but no automatic persistence 415 + - **Core features**: 95% complete (auth, sync, rooms, messages, state, presence) 416 + - **E2EE primitives**: 90% complete (keys, Olm, Megolm - verification partial) 417 + - **Advanced features**: 70% complete (backup, sliding sync, secret storage incomplete) 418 + - **Infrastructure**: 80% complete (storage in-memory only, no integration tests) 121 419 122 - **Store module:** 123 - - All three stores (STATE_STORE, CRYPTO_STORE, EVENT_CACHE_STORE) are in-memory only 124 - - Module types defined for pluggable backends but only memory implementations exist 125 - - No SQLite or file-based implementations 126 - 127 - **Timeline module:** 128 - - LinkedChunk `push_back` has TODO for trimming when over `max_events` limit 129 - - LRU eviction in Cache removes oldest room but doesn't preserve by access time 130 - 131 - **Olm module:** 132 - - Session pickle/unpickle uses simplified JSON format 133 - - Ratchet implementation follows spec but needs real-world validation 134 - - No session recovery from corrupted state 135 - 136 - ## Build & Test 137 - ```bash 138 - cd /workspace/mymatrix/project/ocaml-matrix 139 - dune build 140 - dune runtest 141 - ``` 142 - 143 - ## Architecture Notes 144 - - Olm module provides session management for E2EE (X3DH, Double Ratchet, Megolm) 145 - - UIAA module supports password, recaptcha, email, and dummy authentication flows 146 - - Timeline module uses LinkedChunk for efficient pagination (based on matrix-rust-sdk pattern) 147 - - Store module provides pluggable storage with in-memory implementations 148 - - Verification module supports SAS (emoji/decimal) and QR code verification structures 149 - - Backup module implements m.megolm_backup.v1.curve25519-aes-sha2 encryption 150 - - Send_queue module provides offline queueing with dependency tracking and retry logic 151 - - Protocol types have 39 roundtrip tests; client modules need integration tests 152 - 153 - ## Comparison with matrix-rust-sdk 154 - The OCaml SDK now covers most major features of matrix-rust-sdk: 155 - - ✅ Core client operations (auth, sync, rooms, messages) 156 - - ✅ E2EE primitives (Olm, Megolm, key management) 157 - - ✅ Cross-signing key structures and verification protocols 158 - - ✅ Key backup encryption/decryption 159 - - ✅ Send queue with dependency system 160 - - ✅ Timeline caching with LinkedChunk 161 - - ✅ Pluggable storage architecture 162 - - ⚠️ Verification flows need to-device message integration 163 - - ⚠️ Backup needs server API integration 164 - - ⚠️ Storage needs persistent implementations 165 - - ❌ Sliding sync (MSC3575) - stub only 166 - - ❌ Secret storage (m.secret_storage.v1) 420 + The SDK is suitable for building Matrix clients with basic E2EE support. Full production use requires completing verification flows, backup server integration, and persistent storage backends.