Transaction limits API overview

Transaction limit policy configuration

You can create, update, enable, and disable transaction limit policies via the Bastion admin dashboard, as shown in the screenshots below. You can view transaction limit policies either via the Bastion admin dashboard, or via API through the Get Transaction Limit Policy or List Transaction Limit Policies endpoints.

Creation of a transaction limit policy involves defining the following properties:

Name	Description
Scope	This property describes who the policy applies to. It can be set to one of the following two values: - App Scoped: The policy will apply to all identities in your application. - Identity Scoped: The policy will apply to a specific identity.
Identity ID	The identity ID that the policy applies to. This property is only relevant for Identity Scoped policies.
Evaluation Window	This property describes what set of transactions is taken into account when evaluating a policy. It can be set to one of the following two values: - Per Transaction: Only the current transaction is used to evaluate the policy (i.e. the policy sets a maximum value for any single transaction). - Past Week: The cumulative value of given identity’s transactions over the past week (including the current transaction) is used to evaluate the policy.
Threshold Type	This property describes what behavior will be executed if the transaction limit is breached. It can be set to one of the following two values: - Hard: Transactions that breach the policy will be blocked AND trigger webhook notifications (see webhook documentation here). - Soft: Transactions that breach the policy will trigger webhook notifications but will NOT be blocked.
Threshold Amount	The minimum transacted amount that will cause a policy to be breached.
Threshold Currency	The currency that the threshold amount is defined in. At the moment, only USD is supported.

Note that there can only be one transaction limit policy per unique combination of the following fields: Scope, Evaluation Window, Threshold Type, and Identity ID. These four fields are also immutable once a policy is created, in other words, only a policy’s Threshold Amount may be updated after creation.

Transaction limit policy evaluation

Up to four transaction limit policies may apply to a given identity — i.e. one per unique combination of Evaluation Window and Threshold Type. In other words, an identity will be subject to at most:

One policy with Evaluation Window = Past Week, and Threshold Type = Hard
One policy with Evaluation Window = Past Week, and Threshold Type = Soft
One policy with Evaluation Window = Per Transaction, and Threshold Type = Hard
One policy with Evaluation Window = Per Transaction, and Threshold Type = Soft

If there is both an App Scoped and relevant Identity Scoped policy with the same values for Evaluation Window and Threshold Type, then the Identity Scoped policy will take precedence over the App Scoped policy. As an example, consider a scenario where the following policies are set:

A policy with Scope = App Scoped, Evaluation Window = Past Week, and Threshold Type = Hard
A policy with Scope = Identity Scoped, Identity Id = Identity123, Evaluation Window = Past Week, and Threshold Type = Hard

If Identity123 submits a cryptocurrency transfer, it would be subject to the second policy rather than the first policy.

Authentication

API Reference

Webhooks

Transaction limits API overview

Transaction limit policy configuration

Transaction limit policy evaluation

​Transaction limit policy configuration

​Transaction limit policy evaluation

Transaction limit policy configuration

Transaction limit policy evaluation