https://developer.cybersource.com/docs/cybs/en-us/tap-to-phone-sis/integration/all/rest/tap-to-phone-sis/ttp-sis-pymnt-svcs-cloud-mode-intro/ttp-sis-pymnt-svcs-cloud-sale-on-reader-tip-api-in/ttp-sis-pymnt-svcs-cloud-sale-on-reader-tip-api-re.html
Sale with On-Reader Tipping - Required Fields for a Sale with On-Reader Tipping
tipping requiredfor asalereaderfields