specify if preauthorization is needed for the transaction. if "true" is passed, amount will be blocked on the card and additional request should be executed by merchant to complete payment. To finalize authorization process, /v1/tpay/payments/:paymentId/completion endpoint should be used. Note, that Completion request can be initiated not later than 30 days from Preauthorization date. By default block is saved for 30 days, although some banks may have a different setting, so this setting depends on the card issuing bank (Isuer Bank). The following values are allowed: true, false