https://github.com/jryans/matrix-limits

A collection of various limits and related factoids about the Matrix specification and implementations.
https://github.com/jryans/matrix-limits

client limits matrix server spec

Last synced: 28 days ago
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A collection of various limits and related factoids about the Matrix specification and implementations.

• Host: GitHub
• URL: https://github.com/jryans/matrix-limits
• Owner: jryans
• License: other
• Created: 2021-07-02T15:25:06.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2021-07-02T15:59:06.000Z (over 3 years ago)
• Last Synced: 2024-10-19T08:15:21.806Z (3 months ago)
• Topics: client, limits, matrix, server, spec
• Homepage:
• Size: 10.7 KB
• Stars: 11
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE.md
  • Code of conduct: CODE_OF_CONDUCT.md

Awesome Lists containing this project

• awesome-matrix - Matrix Limits - A collection of (Factoids / Single Purpose Bots)

README

        
# Matrix Limits

A collection of various limits and related factoids about the Matrix

specification and implementations.

## Contents

- [Specification](#specification)

  - [Events](#events)

  - [Identifiers](#identifiers)

- [Servers](#servers)

  - [Synapse](#synapse)

  - [Dendrite](#dendrite)

---

## Specification

### Events

The content has been adapted from [the

spec](https://spec.matrix.org/unstable/client-server-api/#size-limit) itself.

- Events must not be larger than 64 KiB when [formatted as a

  PDU](https://spec.matrix.org/unstable/server-server-api/#pdus)

- `sender` must not exceed 255 bytes (including domain)

- `room_id` must not exceed 255 bytes

- `state_key` must not exceed 255 bytes

- `type` must not exceed 255 bytes

- `event_id` must not exceed 255 bytes

### Identifiers

- [User ID

  localparts](https://spec.matrix.org/unstable/appendices/#user-identifiers) are

  limited to `[a-z0-9-.=_/]+` in the spec, but historical user IDs can contain

  any printable ASCII except spaces and federation allows arbitrary unicode

  including unprintable ASCII

## Servers

### Synapse

- Events table [used to use a 32-bit stream ordering

  ID](https://github.com/matrix-org/synapse/issues/8255), limiting a server to a

  total of 2^31 (2,147,483,648) events across all known rooms (develop [has

  changed](https://github.com/matrix-org/synapse/pull/10264) to `bigint`, so the

  limit will soon become 2^63)

### Dendrite

---

## Contribute

Contributions welcome! 😄 Read the [contribution guidelines](CONTRIBUTING.md)

first.

## License

Creative Commons Attribution 4.0 International