SDMP

As part of the synchronization process, nodes transmit journal updates to other nodes. In this way, nodes can transmit knowledge of a published resource without needing to transmit the resource itself.

Broadcast Object

When a journal update is transmitted, it must be sent inside of a valid resource object, which must be signed by the node sending the update.

Description

This schema is used when a node responds to a journal request, or when a node periodically sends a journal update to other nodes.

The deserialized resource payload object contains the list of journal entries that it has added since the last time it broadcast to the particular node.

For example, if node A broadcasts a journal update to node B and then writes n additional entries to its own journal, node A would broadcast those n entries to node B on the next broadcast.

This object has the following properties:

journal (object, required)

Holds the data properties. This contains the following reserved properties:

journal.since (string, required)

This property is the journal line identifier of the line immediately preceding the first entry in the journal entries list of this object.

(E.g., if the first entry of the journal entry list in this object were line identifier n, this value would be n-1.)

journal.entries (ordered string list, required)

An ordered list of valid journal entries.

Schema

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "properties": {
    "journal": {
      "type": "object",
      "properties": {
        "since": {
          "type": "string"
        },
        "entries": {
          "type": "array",
          "items": {
            "type": "string"
          }
        }
      },
      "required": [ "since", "entries" ]
    }
  },
  "required": [ "journal" ]
}