Webhook Callbacks

Webhooks are a crucial part of the Spark API, as they serve as automatic callbacks that alert your system to important events without requiring constant monitoring. For example, the DeclineCallback is triggered if a transaction fails after a successful TriggerTransaction request. This could happen if a consumer cancels the transaction on the device or if the terminal times out. Other webhooks, like TimeoutCallback and StopCallback, let you know when a session has timed out or when a card has been presented to stop a session, respectively.

By using these callbacks, you can quickly handle failures and other events, ensuring your system's transaction state remains accurate without requiring constant polling.

Available Webhooks