Essentials

CryptoXR Hackathon

BUIDL with Alephium & LSW3

31.01 - 01.02.2025

In person

€15,000 in ALPH is up for grabs at the first-ever in-person Alephium hackathon, hosted by France’s most beloved crypto event, CryptoXR, and LSW3!
This 1-day on-site hackathon welcomes both teams and solo developers to buidl. Don’t miss the chance to dive into Alephium’s innovative blockchain technology, showcase your skills, and connect with the vibrant CryptoXR community.

When & where?

The hackathon will take place exclusively on-site at Auxerre Expo Parc (Auxerrexpo) on Friday January, 31st and Saturday, February 1st, as part of CryptoXR. Detailed directions to the venue can be found on the official CryptoXR website.

All registered hackathon participants will automatically receive entry to CryptoXR, so you can enjoy the full event experience!

Hackathon Organizers

Crypto XR

Auxerre is set to become France’s Web3 capital from January 30 to February 1, 2025, as CryptoXR returns for its third edition. With over 3,000 visitors, 70+ speakers, and a 6,000 m² exhibition space, CryptoXR is one of the most accessible and inclusive Web3 events in France. Focused on federating and democratizing Web3 technologies, the event brings together industry pioneers, local actors, and the broader public to celebrate innovation, inclusivity, and decentralization.

LSW3

LSW3 is rapidly becoming one of the largest professional Web3 networks in France, with nearly 100 members, including major players like Binance, Morpho, and Vivendi, as well as representation from the French government on its board. This growing alliance is dedicated to enhancing security across the Web3 ecosystem by uniting industry leaders, public institutions, and innovators to share best practices and combat fraud and scams in blockchain and cryptocurrency. Its mission is to make Web3 technologies safer, more transparent, and widely accessible, solidifying its position as a cornerstone of the French Web3 landscape.

Alephium

Alephium is a next-gen Proof-of-Work Layer 1 blockchain designed to tackle scalability, security, and sustainability, making it an ideal foundation for impactful, future-ready blockchain solutions. With BlockFlow technology, it supports over 10,000 tps, ensuring efficiency for global applications while maintaining a simple, single-chain experience. Its stateful UTXO model combines smart contract flexibility with UTXO security, providing a secure environment for dApps and tokenized assets. Alephium’s Proof-of-Less-Work cuts energy use by 87%, aligning with environmental goals without compromising decentralization. As the second-largest PoW blockchain by TVL after Bitcoin, Alephium powers DeFi, mining, and large-scale initiatives like the billion-dollar GIGATONS project.

Prizes & category for teams

The most functional, impactful, and innovative projects will be rewarded with the following prizes:

Main prizes

1st Place:
€3,000
in ALPH
2nd Place:
€2,000
in ALPH
3rd Place:
€1,000
in ALPH

Special prizes

In addition to the main prizes, teams have additional opportunities to be recognized and rewarded with

€500 each

for excelling in specific areas:

Most Creative Project – Celebrating exceptional creativity and originality in leveraging Alephium’s features.
Best User Experience (UI/UX) – Recognizing projects with outstanding design, ease of use, and accessibility.
Best Code Quality – Rewarding clean, efficient, and well-documented code that follows best practices.
Best Security Project – Honoring tools that enhance Alephium’s security, such as vulnerability scanners, testing frameworks, or monitoring systems.

Please note: We reserve the right to adjust the prize categories based on the final submissions received to ensure alignment with the quality and diversity of the projects.

Prizes for Solo-participants

Total Prize Pool:

€3,000

Solo developers, this is your time to shine! We’ve curated a variety of challenges tailored to individual contributors, offering flexible opportunities to showcase your skills and creativity. These challenges aim to empower solo hackers to dive into Alephium’s ecosystem, solve puzzles, and create tools that benefit the broader developer community. Here are some examples of potential challenges and rewards (final challenges to be defined):

Port a Simple Solidity Contract
Up to €500
– Select from a predefined list of Solidity contracts and port one to Alephium’s platform. This challenge tests your ability to adapt smart contracts to a new blockchain environment.
Solve the Bounty Puzzle
€100 (based on complexity)
– Recognizing projects with outstanding design, ease of use, and accessibility.
Build a Mini-Tool or Utility for Alephium Developers
Up to €500
– Create a lightweight, functional tool to enhance the Alephium development experience. This could include testing frameworks, debugging tools, or utilities that streamline development workflows.

Stay tuned for more challenges! If you have an idea for a challenge, propose it to us upon registration or in person during the onboarding session on Friday January, 31st.

Participants can look forward to a host of surprises throughout the event! From exclusive goodies and swag to bonus challenges and unexpected rewards, we’ve got plenty in store to make your hackathon experience unforgettable. Whether it’s a token of appreciation or an extra boost of motivation, we’re here to ensure every participant feels valued and inspired.

Timeline

Friday - 16:00-20:00

16:30 - 17:00

Welcome & Alephium Introduction

17:00 - 18:00

Onboarding & resources sharing:

18:00-20:00

Open office + small Apéro

Saturday - 9:00 - 20:00

9:00

Opening

9:30

Hackathon Start

12:30

Lunch

17:00

Submission deadline

17:00-20:00

Review

20:00-20:30

Winner announcement on the main stage

How can I participate?

Getting involved is easy!

Register: Start by completing the registration form here to secure your spot.
Prepare: Ahead of the event, we’ll send you some resources to help you get started. In the meantime, you can already explore the Alephium documentation to familiarize yourself with the chain and its features.
Attend CryptoXR: Make sure to come to the CryptoXR event at Auxerrexpo, as the hackathon will take place exclusively on-site.
Join the Onboarding Session: Don’t miss the onboarding session on Friday, January 31st, where we’ll guide you through everything you need to know to kickstart your hackathon experience.

If you have any questions about the hackathon or need assistance, feel free to email us at [email protected] or [email protected] —we’re here to help!

Jury

We are excited to announce our panel of judges for the hackathon:

Cheng Wang

Founder and core developer of Alephium, bringing deep expertise in blockchain technology and innovation.

Hongchao

Core developer at Alephium, contributing extensive experience in decentralized systems and development.

Nicolas Bacca

Co-founder of Ledger and creator of BTChip, his work has been instrumental in shaping key technologies in the crypto space.

With their diverse backgrounds and expertise, our jury is well-equipped to evaluate the creativity, functionality, and impact of your projects. Stay tuned for more exciting announcements as we reveal additional members of our judging panel!

What are the rules?

To ensure a fair and exciting competition, all participants must follow the Hackathon rules:

Participants must be at least 18 years old (or the age of majority in their jurisdiction).
Teams can have up to 5 members, and solo participation is also welcome.
Submissions must be completed and submitted before the deadline.
All projects must comply with applicable laws and intellectual property requirements.
Prizes will be awarded at the full discretion of the jury.

For full details on eligibility, team formation, submission guidelines, judging criteria, and more, check out the complete Hackathon rules here.