1. Designing Blockchain-based Applications a Case Study for Imported
Product Traceability
Source: Future generation computer systems, Vol. 92,
pp , Mar. 2019
Authors: Xiwei Xu, Qinghua Lu, Yue Liu c, Liming Zhu,
Haonan Yao, and Athanasios V. Vasilakos
Speaker: Chit-Jie Chew
Date: 4/18/2019
1,2,4: 澳洲 新南威爾斯大學
3,5: 中國 石油大學
6: 瑞典 呂勒奧理工大學

2. Outline 01 Introduction 02 Related works 03 Proposed scheme
04　Experimental results
05　Conclusions

3. Introduction - (1/2)
Supply chain

4. Correctness? Introduction - (2/2) Product Product information Supplier
Retailer
Product information
Correctness?
Database
Certificate
Photo

5. Blockchain layer (On-chain)
Related works - (1/2)
Blockchain
Transparent
Non-tampering
Traceable
Blockchain layer (On-chain)
Data layer
(Off-chain)
Blockchain
Alice
Participants
h(data)
h( ) = ( ) ?

6. Related works - (2/2) Smart contract Alice Blockchain Smart contract
function selectItem(uint dollar, string item){
if (item == cola)
if(dollar == 10)
/output cola/ }
Alice
Blockchain
Smart contract
Address
Value
State
Functions
output cola
selectItem(10,cola)
Bob
Cola
Smart contract

7. Traceability provider
Proposed scheme - (1/5)
Architecture of originChain
Supplier
Traceability provider
Blockchain admin
Management layer
Data layer
(Off-chain)
Blockchain layer
(On-chain)

8. Proposed scheme - (2/5) Structural design of smart contracts
Blockchain layer
(On-chain)
Data layer
(Off-chain)
Supplier
Factory contract source code
Factory contract
Contract definition
Blockchain admin
Deploy once
Cola
Instantiate
Registry contract
Condition
# legal contract
Authorities []
Threshold
Traceability provider
Legal contract
Addr smart contract
Condition
Binding

9. Proposed scheme - (3/5) Architecture of originChain Blockchain admin
Smart contract management
Permission control
Blockchain management
Deploy
smart contracts
Smart contracts
code
Smart contracts
& blockchain permission control info.
Management layer
System permission control info..
Smart contract repository
Permission control
Blockchain network info.
Smart contract address, smart contract ability
Data layer
(Off-chain)
Blockchain layer (On-chain)

10. Proposed scheme - (4/5) Architecture of originChain Supplier
Product & enterprise management
Management layer
Product & enterprise
Data layer
(Off-chain)
Blockchain layer (On-chain)

11. Proposed scheme - (5/5) Architecture of originChain
Traceability provider
Sample test management
Traceability management
Test results
H(Certificates),
H(Photos)
Test results
Certificates,
Photos
Management layer
Sample test result
Traceability
Transaction address
Transaction address
Data layer
(Off-chain)
Blockchain layer (On-chain)

12. multiSignature contract
Experimental results - (1/2)
Upgradability
multiSignature contract
dyanamicBiding

13. Experimental results - (2/2)
Quantitative analysis
Writing latency (ms)
Reading latency (ms)

14. Conclusions
Adaptability
Traceability