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First Prize Winner at 2018 LongHash Tokyo Blockchain Hackathon

· 4 min read
Anakorn Kyavatanakij
CS Student @ Peking University

2018 LongHash Tokyo Hackathon is a blockchain hackathon hosted by LongHash and co-organized by CYBEX and Taraxa. It was held from April 20, 2018 to April 22, 2018 in Roppongi, Tokyo, Japan.

Based on the theme of "Decentralization" and "Security," 137 blockchain-related experts and developers from 12 countries representing companies and universities worldwide were invited to have open discussions and jointly develop new features that will contribute to the development of blockchain technology.

LongHash Hackathon
LongHash Hackathon
LongHash Hackathon


The hackathon has three open questions that participants can choose to tackle:

  1. Regulatory Compliance and Performance Improvement of Decentralized Exchanges
  2. Data Analytics on Blockchain for Business and Regulations (AML)
  3. Blockchain-Enabled IoT Solutions for Data Silo and Security


A total of 100 ETH will be awarded to the six winning teams, and the top 50 contestants can reimburse travel expenses.

Judges and Mentors#

Judges and mentors of the hackathon are all well-known blockchain-industry leaders ranging from:

LongHash Judges
LongHash Judges 2

Winning First Prize#

I was invited to participate in the hackathon as a member of the Peking University InfoSec Laboratory team (supervised by Professor Chen Zhong and Associate Research Professor Guan Zhi). The six students of our lab were divided into two groups. The first group, composed of Abba Graba, Ke Wang, and Li Yue, focused on improving blockchain consensus protocol for the Internet of Things. I, Liu Chao, and Li Anran formed the second group (Team 18: Yet Another Atomic Swap), tackling the topic of atomic swaps on decentralized exchanges.

After two sleepless nights and a lot of caffeine, our group proposed an improvement plan for the decentralized trading platform Cybex, which consists of design and code implementation. With a profound understanding of the problem, perfect plan design, and excellent on-the-spot performance, our team advanced to the final six and won the first prize award.


First Prize Award awarded by Dr. Xiao Feng, Chairman of Wanxiang Blockchain, and Evgenia Broshevan, Co-Founder of Hacken Group

First Prize at LongHash Hackathon
First Prize at LongHash Hackathon
First Prize at LongHash Hackathon

Read more about our atomic swaps design here

Other Winning Teams#

Second Prize winners#

Team 29: Labeling, Identifying & Classifying Public Address Behavior

Team 6: Curvegrid's Token Dijkstra

Second Prize at LongHash Hackathon

ps. I was really impressed with the public address classification project by Team 29 from Carnegie Mellon University.

Third Prize Teams#

Team 17: BTC Address Classification by Machine Learning

Team 1: GibuvAroch

Team 23: hogehoge

Third Prize at LongHash Hackathon

After Party#

After the awards were given, we had a small meet-and-greet with a Japanese KOL and ate lots of sushi and sashimi. Yay!

After party
After party

Other Photos#

Capsule Hotel
LongHash Hackathon
LongHash Hackathon
First Prize at LongHash Hackathon

In the news#