ce-type is set to the value of startEventType configured on that node — this is how your integration service identifies which operation to perform.
See Flow Configuration for transaction node configuration.
ce-type: <startEventType>
Commerce sets ce-businesskey to the payment ID, or to the refund ID in refund flows, and ce-accountid to the account ID. Send both values back on the Finish event.
Payload
string
Configuration key from the transaction node. Used by the integration service to select the appropriate processing configuration.
object
Transaction data passed to the integration service.
object
Execution context of the flow at the time the transaction node was reached.