Affected shopping cart item object.

Indicates whether result has any other (custom) errors.

Indicates whether the check has failed.

Number of available units when not enough. Value is set to -1 when all requested units are available.

Maximum unit count in one order. Value is set to -1 when maximum units in order condition is met.

Indicates that maximum unit count in one order condition is not met.

Minimum unit count in one order. Value is set to -1 when minimum units in order condition is met.

Indicates that minimum unit count in one order condition is not met.

Indicates that requested unit count is not available.

List of other (custom) error messages.

Indicates that product is disabled.

Indicates that product has expired.

Indicates that product can not be purchased, because it requires registered customer.