Skip to main content
GET
/
v2
/
updates
/
{update_id}
/v2/updates/{update_id}
curl --request GET \
  --url https://example.com/api/scan/v2/updates/{update_id}
{
  "update_id": "<string>",
  "migration_id": 123,
  "workflow_id": "<string>",
  "record_time": "<string>",
  "synchronizer_id": "<string>",
  "effective_at": "<string>",
  "root_event_ids": [
    "<string>"
  ],
  "events_by_id": {},
  "external_transaction_hash": "<string>"
}

Documentation Index

Fetch the complete documentation index at: https://docs.canton.network/llms.txt

Use this file to discover all available pages before exploring further.

Path Parameters

​
update_id
string
required

Query Parameters

​
daml_value_encoding
enum<string>

How daml values should be encoded in the response. "compact_json" is a compact, human-readable JSON encoding. It is the same encoding as the one used in the HTTP JSON API or the JavaScript codegen. "protobuf_json" is a verbose JSON encoding that is more difficult to parse, but contains type information, i.e., the values can be parsed losslessly without having access to the Daml source code. Optional and defaults to "compact_json".

Available options:
compact_json,
protobuf_json

Response

ok

An individual item in the update history. May be a transaction or a contract reassignment.

​
update_id
string
required

The id of the update.

​
migration_id
integer<int64>
required

The migration id of the synchronizer.

​
workflow_id
string
required

This transaction's Daml workflow ID; a workflow ID can be associated with multiple transactions. If empty, no workflow ID was set.

​
record_time
string
required

The time at which the transaction was sequenced, with microsecond resolution, using ISO-8601 representation.

​
synchronizer_id
string
required

The id of the synchronizer through which this transaction was sequenced.

​
effective_at
string
required

Ledger effective time, using ISO-8601 representation. This is the time returned by getTime for all Daml executed as part of this transaction, both by the submitting participant and all confirming participants.

​
root_event_ids
string[]
required

Roots of the transaction tree. These are guaranteed to occur as keys of the events_by_id object.

​
events_by_id
object
required

Changes to the ledger that were caused by this transaction, keyed by ID and sorted lexicographically by ID for display consistency. Values are nodes of the transaction tree. Within a transaction, IDs may be referenced by root_event_ids or child_event_ids in ExercisedEvent herein, which are sorted in the order as they occurred in the transaction.

​
external_transaction_hash
string

For transaction externally signed, contains the external transaction hash signed by the external party. Can be used to correlate an external submission with a committed transaction.