# THREE\_D\_SECURE\_RULES

**Type**: `array` of rule objects\
**Default**: `[]` (empty array)\
**Validator**: `ThreeDSecureRuleSerializer`\
**Description**: Rule-based conditions that determine when 3D Secure verification is required.

Each rule object has the following structure:

* `klass`: Rule class path (string, required)
* `defaults`: Rule parameters (JSON object, required)

**Available rule classes**:

* `omnishop.orders.rules.amount_limit`: Requires 3D Secure if transaction amount exceeds specified limit
* `omnishop.orders.rules.masterpass_amount_limit`: Amount limit for Masterpass transactions
* `omnishop.orders.rules.check_pos_slug_three_d_only`: Requires 3D Secure for specific POS terminals
* `omnishop.orders.rules.trial_limit_per_user_email`: Requires 3D Secure after N failed attempts per email
* `omnishop.orders.rules.trial_limit_per_remote_addr`: Requires 3D Secure after N failed attempts per IP
* `omnishop.orders.rules.only_guest_user`: Requires 3D Secure for guest users only
* `omnishop.orders.rules.is_first_order`: Requires 3D Secure for first-time purchasers
* `omnishop.orders.rules.payment_currency`: Requires 3D Secure for specific currencies

**Rule evaluation**:

* Only evaluated if `THREE_D_SECURE_ENABLED` is `true`
* Rules are evaluated in array order
* If ANY rule returns `true`, 3D Secure is required
* If ALL rules return `false`, 3D Secure is not required

**Example configuration**:

```json
[
  {
    "klass": "omnishop.orders.rules.amount_limit",
    "defaults": {"limit": 1000.00}
  },
  {
    "klass": "omnishop.orders.rules.only_guest_user",
    "defaults": {}
  }
]
```

**Used in**: `CreditCardConfirmationPage` via `check_three_d_secure()` function to evaluate rule-based conditions


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