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Add specification for room version 3: Event IDs as hashes
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Original proposal: #1659
Implementation proofs (some traversing of the PR tree may be required to get all of them):
* matrix-org/synapse#4483
* matrix-org/synapse#4499

This doesn't intentionally change anything from the proposal.

**Implementation details**:

The simple part of this is the introduction of a rooms/v3.html document. The somewhat unclear part is the stuff done to the s2s definitions. This pulls `unsigned_pdu` out to `unsigned_pdu_base` (all fields except `event_id`) where it can be reused in `pdu` and `pdu_v3` (for rooms v3). These definitions are further moved into the room version specifications where they can highlight the exact schemas in detail.

Version 1 has been updated to include the pre-existing event format, however the core principles of the room have not been changed. The same applies to room version 2. Room versions have immutable core principles once in the spec, otherwise these format changes would land in a pre-existing version.

The client-server API event formats will need updating, however that is being punted to a different commit to try and keep these changes reviewable.
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turt2live committed Jan 31, 2019
1 parent 4437c38 commit ff75996
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73 changes: 73 additions & 0 deletions api/server-server/definitions/pdu_v3.yaml
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# Copyright 2019 New Vector Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
type: object
title: Persistent Data Unit
description: A persistent data unit (event) for room version 3.
example:
$ref: "../examples/pdu_v3.json"
allOf:
- $ref: "unsigned_pdu_base.yaml"
- type: object
properties:
auth_events:
type: array
items:
type: string
description: Event ID.
description: |-
Event IDs and reference hashes for the authorization events that would
allow this event to be in the room.
example: ["$abase64encodedhash", "$anotherevent"]
prev_events:
type: array
items:
type: string
description: Event ID.
description: |-
Event IDs and reference hashes for the most recent events in the room
that the homeserver was aware of when it made this event.
example: ["$abase64encodedhash", "$anotherevent"]
hashes:
type: object
title: Event Hash
description: |-
Content hashes of the PDU, following the algorithm specified in `Signing Events`_.
example: {
"sha256": "thishashcoversallfieldsincasethisisredacted"
}
properties:
sha256:
type: string
description: The hash.
example: thishashcoversallfieldsincasthisisredacted
required: ['sha256']
signatures:
type: object
description: |-
Signatures for the PDU, following the algorithm specified in `Signing Events`_.
example: {
"example.com": {
"ed25519:key_version:": "these86bytesofbase64signaturecoveressentialfieldsincludinghashessocancheckredactedpdus"
}
}
additionalProperties:
type: object
title: Server Signatures
additionalProperties:
type: string
required:
- auth_events
- prev_events
- hashes
- signatures
145 changes: 9 additions & 136 deletions api/server-server/definitions/unsigned_pdu.yaml
Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
# Copyright 2018 New Vector Ltd
# Copyright 2018-2019 New Vector Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
Expand All @@ -16,140 +16,13 @@ title: Unsigned Persistent Data Unit
description: An unsigned persistent data unit (event)
example:
$ref: "../examples/unsigned_pdu.json"
properties:
event_id:
type: string
description: The event ID for the PDU.
example: "$a4ecee13e2accdadf56c1025:example.com"
room_id:
type: string
description: Room identifier.
example: "!abc123:matrix.org"
sender:
type: string
description: The ID of the user sending the event.
example: "@someone:matrix.org"
origin:
type: string
description: The ``server_name`` of the homeserver that created this event.
example: "matrix.org"
origin_server_ts:
type: integer
format: int64
description: Timestamp in milliseconds on origin homeserver when this event was created.
example: 1234567890
type:
type: string
description: Event type
example: "m.room.message"
state_key:
type: string
description: |-
If this key is present, the event is a state event, and it will replace previous events
with the same ``type`` and ``state_key`` in the room state.
example: "my_key"
content:
type: object
description: The content of the event.
example: {"key": "value"}
prev_events:
type: array
description: |-
Event IDs and reference hashes for the most recent events in the room
that the homeserver was aware of when it made this event.
items:
type: array
maxItems: 2
minItems: 2
items:
- type: string
title: Event ID
example: "$abc123:matrix.org"
- type: object
title: Event Hash
example: {
"sha256": "abase64encodedsha256hashshouldbe43byteslong"
}
properties:
sha256:
type: string
description: The event hash.
example: abase64encodedsha256hashshouldbe43byteslong
required: ['sha256']
depth:
type: integer
description: |-
The maximum depth of the ``prev_events``, plus one. Must be less than the
maximum value for an integer (2^63 - 1). If the room's depth is already at
the limit, the depth must be set to the limit.
example: 12
auth_events:
type: array
description: |-
Event IDs and reference hashes for the authorization events that would
allow this event to be in the room.
items:
type: array
maxItems: 2
minItems: 2
items:
- type: string
title: Event ID
example: "$abc123:matrix.org"
- type: object
title: Event Hash
example: {
"sha256": "abase64encodedsha256hashshouldbe43byteslong"
}
properties:
sha256:
type: string
description: The event hash.
example: abase64encodedsha256hashshouldbe43byteslong
required: ['sha256']
redacts:
type: string
description: For redaction events, the ID of the event being redacted.
example: "$def456:matrix.org"
unsigned:
type: object
title: Example Unsigned Data
description: |-
Additional data added by the origin server but not covered by the ``signatures``. More
keys than those defined here may be used.
example: {"key": "value"}
allOf:
- $ref: "unsigned_pdu_base.yaml"
- type: object
properties:
age:
type: integer
description: The number of milliseconds that have passed since this message was sent.
example: 4612
replaces_state:
event_id:
type: string
description: The event ID of the state event this event replaces.
example: "$state_event:example.org"
prev_sender:
type: string
description: The sender of the replaced state event.
example: "@someone:example.org"
prev_content:
type: object
description: The content of the replaced state event.
example: {
"membership": "join",
"displayname": "Bob"
}
redacted_because:
type: string
description: A reason for why the event was redacted.
example: "Inappropriate content"
required:
- event_id
- room_id
- sender
- origin
- origin_server_ts
- type
- content
- prev_events
- depth
- auth_events
description: The event ID for the PDU.
example: "$a4ecee13e2accdadf56c1025:example.com"
required:
- event_id
151 changes: 151 additions & 0 deletions api/server-server/definitions/unsigned_pdu_base.yaml
Original file line number Diff line number Diff line change
@@ -0,0 +1,151 @@
# Copyright 2018 New Vector Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
type: object
title: Unsigned Persistent Data Unit
description: An unsigned persistent data unit (event)
example:
$ref: "../examples/unsigned_pdu_base.json"
properties:
room_id:
type: string
description: Room identifier.
example: "!abc123:matrix.org"
sender:
type: string
description: The ID of the user sending the event.
example: "@someone:matrix.org"
origin:
type: string
description: The ``server_name`` of the homeserver that created this event.
example: "matrix.org"
origin_server_ts:
type: integer
format: int64
description: Timestamp in milliseconds on origin homeserver when this event was created.
example: 1234567890
type:
type: string
description: Event type
example: "m.room.message"
state_key:
type: string
description: |-
If this key is present, the event is a state event, and it will replace previous events
with the same ``type`` and ``state_key`` in the room state.
example: "my_key"
content:
type: object
description: The content of the event.
example: {"key": "value"}
prev_events:
type: array
description: |-
Event IDs and reference hashes for the most recent events in the room
that the homeserver was aware of when it made this event.
items:
type: array
maxItems: 2
minItems: 2
items:
- type: string
title: Event ID
example: "$abc123:matrix.org"
- type: object
title: Event Hash
example: {
"sha256": "abase64encodedsha256hashshouldbe43byteslong"
}
properties:
sha256:
type: string
description: The event hash.
example: abase64encodedsha256hashshouldbe43byteslong
required: ['sha256']
depth:
type: integer
description: |-
The maximum depth of the ``prev_events``, plus one. Must be less than the
maximum value for an integer (2^63 - 1). If the room's depth is already at
the limit, the depth must be set to the limit.
example: 12
auth_events:
type: array
description: |-
Event IDs and reference hashes for the authorization events that would
allow this event to be in the room.
items:
type: array
maxItems: 2
minItems: 2
items:
- type: string
title: Event ID
example: "$abc123:matrix.org"
- type: object
title: Event Hash
example: {
"sha256": "abase64encodedsha256hashshouldbe43byteslong"
}
properties:
sha256:
type: string
description: The event hash.
example: abase64encodedsha256hashshouldbe43byteslong
required: ['sha256']
redacts:
type: string
description: For redaction events, the ID of the event being redacted.
example: "$def456:matrix.org"
unsigned:
type: object
title: Example Unsigned Data
description: |-
Additional data added by the origin server but not covered by the ``signatures``. More
keys than those defined here may be used.
example: {"key": "value"}
properties:
age:
type: integer
description: The number of milliseconds that have passed since this message was sent.
example: 4612
replaces_state:
type: string
description: The event ID of the state event this event replaces.
example: "$state_event:example.org"
prev_sender:
type: string
description: The sender of the replaced state event.
example: "@someone:example.org"
prev_content:
type: object
description: The content of the replaced state event.
example: {
"membership": "join",
"displayname": "Bob"
}
redacted_because:
type: string
description: A reason for why the event was redacted.
example: "Inappropriate content"
required:
- event_id
- room_id
- sender
- origin
- origin_server_ts
- type
- content
- prev_events
- depth
- auth_events
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