I. Introduction  
A. Contributions  
B. Related Works  
C. Organization  

II. Background Knowledge  
A. Auction Models  
B. Blockchain Technologies  
C. Integrated Blockchain-Auction Model  

III. Motivations and Considerations for the Integration  
A. Current Issues of Centralized Auctions  
B. Current Issues of Blockchain Incentives  
C. Motivations for the Two-Way Integration  
D. When Does the Integration Make Sense?  

IV. Blockchain-Based Auction Applications  

V. Auction-Based Solutions for Blockchain Enhancement  

VI. Challenges and Future Directions  

VII. Conclusion