Yingrong Zhao d68c993775 Change for free credit design doc (#2046) ... * change database schema based on new user flow * Add offer db implementation * Change credit duration unit to all be days * revert back to use cent to be the unit for credit * Add comments for schema * add type back for mockup design		2019-06-04 18:31:39 -04:00
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design	Change for free credit design doc (#2046)	2019-06-04 18:31:39 -04:00