What is Coupon 1990 IKEA 2015 KFC 2019

What is Coupon 1990 IKEA 2015 KFC 2019 2016 • • • 方便攜帶 能夠追蹤 安全性高 成本低 環保 2

How it works 資料來源: 3

Problems 4

How We Fix it Non-Repudiation Decentralized 5

Smart Contract Blockchain Turing complete 6

System Architecturer 9

Register Process DB info(con. ) Merchant contract addr. Merchant contract info. Merchant public key Merchant contract addr. New Merchandi contract() Register info. Merchant Admin Password Account Merchant Public key New Account() New. ETH Merchandise contract() Merchant contract addr. Merchant Public key name Database Etherum 10

Issue Process Coupon contract User input Coupon name coupon contract addr. Start date End date Value New coupon contract() Start date Merchant End date Value DB info Coupon name Coupon contract addr. Database Etherum 11

Transfer Process consumer info Public key Coupon contract Owner(consumer public key) Grant date Value Consumer Merchant Database Etherum A consumer info Public key Coupon contract Owner(A’s public key) 12

Pay Process Coupon contract Pay coupon Consumer’s public key Coupon contract addr. Consumer Owner(consumer public key) Use date Use value Coupon contract Owner(consumer public key) Use date Use value status(used) Merchant Etherum 13

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