Original author: OneBlock+
The 2nd Summer Polkadot Hackathon Developer Contest officially opened on May 13 Recruitment, co-hosted by Parity, Web3 Foundation, OneBlock+ community and PolkaWorld, co-sponsored by IOSG, SNZ, Hashkey, Fenbushi Capital, and Mpticoin.
Recruitment began on May 13 and ended on June 30. 22 teams have submitted materials and passed the initial interview. Members of these 22 teams have completed the determination of ideas, project formation, and project dblockquoteo development in nearly 50 days. They will all become the core force in building the Polkadot ecosystem.
The following are the basic information of the 22 participating teams, in no particular order:
Captain /Development:
Tang Bohao (https://github.com /btspoony)
Test Development:
Yin Nan (https://github.com/ww8912188)
Technology Support:
Huang Kangning (https://github.com /PandaNotPig)
Liu Chao (https: //github.com/neskynight)
Mintcraft - blockchain toolkits for Metaverse!
Mintcraft - blockchain toolkits for Metaverse
Mintcraft is an idea born during the Spring Polkadot Hackathon. It was originally planned to create a general "game chain" development paradigm. After experiencing the baptism of the spring hackathon, I found that Substrate itself has provided endless possibilities. If a limited development paradigm is built on top of it, this is actually a matter of putting the cart before the horse.
After observing the product ideas of the Spring Hackathon award-winning projects and in-depth analysis of the Mintcraft product route, the Mintcraft team believes that: Docking more lightweight smart contracts , In-depth customization of game development tools and lightweight extension support for the development of blockchain games, these aspects are the most worthwhile directions for breakthroughs.
So the Mintcraft team re-planned the product direction and decided to set off again to participate in this summer Polkadot Hackathon!
The Mintcraft team formed MintEngine Lab to create a new Mintcraft development kit:
Multi-platform blockchain service gateway
Multi-type NFT release channel support: plans to support ink contract NFT, evm contract NFT, and native substrate NFT.
Multiple decentralized storage channels support: plans to support IPFS and Swarm as content storage platforms for NFT.
Use encrypted communication to complete the unified API of multi-chain original transaction construction, sending and confirmation.
Game Engine Suite (based on UnrealEngine 4 Unreal Engine)
Engine built-in software signature machine and Wallet (persistent with ethereum keystore v3 standard)
Encrypted authorization communication mechanism built into the engine and service gateway, using ecdh + aes to ensure symmetric encryption of communication content. (The form of interaction with the blockchain is: Initiate a request in the game-> service gateway to complete the construction of the transaction-> complete the signature in the engine component-> service gateway to send the transaction. Therefore, all messages need to be symmetrically encrypted.) p>
The engine has a built-in object module-based NFT export and publishing tool.
The engine has a built-in NFT loader, which can dynamically load object modules when the game is running.
Smart Contracts and NFT
Use ink! to develop ERC1155 contracts for Dblockquoteo purposes.
Smart contract related, blockchain tools.
Complete the preliminary technology verification and exploration:
Complete the ERC1155 contract implementation, and use metis to implement an ERC20 contract.
Completed the production of the Dblockquoteo model
The API specification of mintcraft-nft-gateway is being produced Design, NFT gateway (under implementation)
Complete the technical verification related to the production of ue4 plug-ins, and start to make ue4 (under implementation)
engine-signer software signature machine
editor-entity-builder NFT export tool
editor-entity-pubpsher NFT publisher (connect nft-gateway)
runtime-entity-loader NFT loader (connect nft -gateway)
Founder: Gordon (https://github. com/CHCP)
Frontend Developer: Chutian Yang (https://github.com/yct21)
p>
Domain Knowledge
Domain Knowledge is a A knowledge creation and sharing system based on domain knowledge. For a certain field, create knowledge content, learning paths, latest developments, recommended books and film and television works in this field.
Based on the Substrate blockchain development, the hash value of the article content is stored on the blockchain, and the article content is stored on IPFS.
Content Platform
< br>
Front-end development completed: homepage, document search, new draft.
The development of the back end is completed: the function of saving articles, querying and so on.
Ou Xuebing, Chai Jie, Stvenyin, Li Xing, Du Yutong, Zhai Jin
Scifanchain
Based on Substrate, Saifan Chain combines the multi-person collaborative creation function provided by the application layer and the client to create a decentralized, open, inclusive, safe and intelligent sci-fi creation The application chain injects vitality into the sci-fi ecology full of infinite possibilities and creates a new model of digital art.
The Saifan Chain serves the science fiction industry, and its main functions include certificate storage on the digital works chain, IPFS distributed storage, collaborative creation consensus, CDE development drive engine, and NGL consultation governance model, etc.
Saifan Chain started from the text creativity to develop the upstream industry. The current functions and features are:
Provide a The conceptual model framework of the universe that combines science and imagination lays the foundation for the collaborative creation of all users;
Through custom-developed Pallet, create a multi-person work tree (Galaxy Forest Project ), to innovate the artistic creation, reading and dissemination modes of science fiction literature;
Comprehensively record the entire creative process, forming a unique block chain genetic map of the work, making the work The value in circulation can be traced and tracked, and scientifically distributed to participants in each link;
Construct a modern consultation model based on a balanced optimization algorithm (better than the parliament Voting and popular democracy) Govern the community and build a consensus-driven development ecology.
Industrial Alliance Chain
The basic construction and data exchange of the chain end, application end and client end have been completed;
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The Pallet of chain-end POE storage certificate has been completed, and the interface is being debugged;
The basic data of the application layer The API interface and JWF token issuance have been completed, and the business logic has been written;
The user authentication of the client is completed, and the API of the application layer and the WebSocket of the chain end have been connected. The RPC interface starts to realize the main business functions.

Technical Architecture Diagram
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Deng Liangjun, Tang Huifeng, Du Linfeng, Wang Yifan, Zhu Yufeng, Liu Jiawei, Zhang Jiechen
Eternity Labs
Eternal Lab is a big data analysis platform based on substrate, which will integrate multiple functions such as quantitative trading, data modeling, risk warning, and data visualization. The project will provide the entire encryption industry with a lower threshold quantitative analysis model, data analysis and other functions.
The system network architecture is designed as a two-layer network system. The on-chain network is used to process assets and models, and the off-chain network is used to process high-consumption resources such as scientific computing. instruction program. The storage of the off-chain network will be connected to the IPFS network to permanently record the instruction set and result set data of off-chain operations.
In the entire off-chain network design, four types of nodes are pioneered to handle functions in different business scenarios. Respectively:
Scheduling node: Responsible for scheduling allocation algorithm model *, After the mainnet goes online, various algorithm models will be scheduled and distributed, and hundreds of tokens will be analyzed;
Quantitative node: Its function is to quantify transactions based on substrate *, to solve the industry Difficulties in quantification will provide and are not limited to grid trading, hidden source model, Bayesian, hidden Markov and other advanced strategy models;
Analysis node: will provide risk warning, data analysis, crawler for the whole network * and other functions, adapt to data analysis of erc20, polkadot, heco, monitor account address, and plan to provide hundreds of strategic analysis models;
Validators: Will defend the entire The node security of the off-chain network * reduces the possibility of nodes doing evil, and provides a safer and smarter system for the entire ecology.
Open Hacking
< br>
Complete the basic construction and data communication of the chain end, application end and client end;
Complete the large Part of the construction of the pallet on the chain, open the interface;
Complete more than 10 quantitative indicators, complete the API deployment of huobi and MXC, and complete part of the quantitative model;
p>
Complete part of cryptocurrency data acquisition, storage and analysis;
Complete web official website, complete most dashboard toolbox component;
Completed most of the off-chain network architecture design and development, and has connected to the substrate network IPFS encrypted network and web front-end interface.

Technical Architecture
Xiong Yanling
p>
Wasmark
Wasmark is a smart contract stress testing tool. The developer provides the account number, the contract, selects the test node and the method to be tested. The results of the stress test will be used for performance analysis by developers in the form of graphs.
Blockchain Tools
Prototype completed;
Improve page logic and provide command line interface.
Li Aohua, He Wei, Huang Jie, Wang Ningbo, Xiao Yue, Liu Feng
TaiShang NFT Furnace
Taishang NFT Alchemy Furnace is an important part of the "NFT platform based on equity binding and personal IP", but it is also an independent service provider infrastructure.
On the basis of not changing the original NFT contract, Taishang endows NFT with combination, dismantling, life cycle, and equity binding by adding a "certificate contract" Determined ability, forging NFT +, creating unlimited innovative gameplay and imagination space.

Schematic diagram of NFT decomposition and combination gameplay

NFT+ content and characteristics analysis diagram
NFT
TaiShang decomposition and combination engine
Warehouse address: https://github.com/WepghtProject/Tai-Shang
Progress: in progress p>
NFT Parser 0x01 —— Basic
Warehouse address: https://github.com/WepghtProject/NFT-Parser-0x01
p>
Browse address: https://0x01.nft.doge.university/#/ a>
Progress: Released
NFT Parser 0x02 —— NFT+ service secondary creation
Warehouse address: https:/ /github.com/WepghtProject/NFT-Parser-0x02
Progress: ready to start
Clark Lee, Marcos, Jpine, Cindy
Udun Network
Udun Network follows the spirit of "CypherPunk", It is a new generation of distributed cross-chain payment network for the future. Its development and improvement is a process of software and hardware synergy in the traditional Internet payment system.
Udun Network is not only a distributed cross-chain payment network, it is also an interactive bridge that supports future digital assets and real business users A future payment ecosystem established by the cross-chain circulation and transaction of centralized digital assets.
Udun Network, from ecological governance, business reconstruction, application distribution to community voting, network operation, all involve the complexity of blockchain computing and communication technology breakthrough.
Parallel chain
< br>
The product official website has been completed and is being deployed;
Cross-chain data interoperability debugging;
Parallel chain development environment deployment completed;
Rococo node debugging.
Tang Linfeng, Ji Qi
PubComentsChain
PubComentsChain is a A new and original decentralized film and television evaluation platform. In order to solve the fundamental problem that traditional centralized film and television evaluations cannot be objective and fair, we introduced objective factors and designed a set of algorithm models. The problem with the centralized film review system.
After implementing the core functions of the application, we will use this as an entry point to add film and television related NFT modules, DEFI modules and related social functions (we will also involve DAO later) Module) to realize the film IP digital platform for producers/actors/fans, hoping to create a blockchain project based on film and television related ecology.
Smart Contract, DAPP
Complete project design;
Complete technical solution design;
The front-end page and smart contract are under development.
Wang Zhou
*Legends Chain *
Based on the social media chain developed by Substrate combined with decentralized storage, creating a safe and free decentralized social media space.
Decentralized social media platform
Pallet is under development.
Owen, Anray, Dao Xie, plpan
Crafting Finance
Crafting finance is a synthetic asset issuance and trading platform based on Polkadot. Crafting uses the "shared debt pool" transaction form, which can achieve almost endless transaction liquidity. Users can mint synthetic assets in Forge by staking a variety of pledges in their hands, and then join the shared debt pool in the Kingsman decentralized exchange to participate in the transaction of multiple different types of synthetic assets.
Smart Contract, DAPP
Completed the prototype of the shared debt pool; developing the core functions of Forge and Kingsman.
Team-founder: Feiying
p>
Co-Founder: Stvenyin, Danny, hfxx, cooper
Market Support: Yueze, Haizhong Jiaolong
NFTmall
The vision and goal of NFTmall is to create a trading platform for NFT digital assets. In the platform, users can freely create, produce, and trade their own NFT tokens. This platform is compatible with mainstream public chains (with cross-chain functions). We study the existing trading market, combine our own technical situation and goals, and decompose the NFTmall project into the following three parts: creating contracts, trading markets, and chain platforms.
DApp, application chain, parachain
Complete project positioning, development path and development plan (completed)< /p>
Complete the production of the Dblockquoteo model (under implementation)
Pubpc chain deployment for public chain testing and deployment , testing and operation (not started)
Deployment, testing and operation in NFTmall chain (not started)

Roadmap & Plan
Product: Xiao Hui (Sean)
Front end: Long Chunyu (Rain), Wu Di (Luffy)
Backend: Tang Xianjie (Zorro), Tong Lei (Eric), Hu Mingwang (dsghmw), Chen Shanzi ( action), Ning Tianyang (Robin)
UI: Long Chunyu (Rain)
Test: Wang Hairong (Lotus)
SECC
Smart Elderly Care Chain SECC (Smart Elderly Care Chain) developed based on the substrate framework ), using the immutable, traceable, and highly transparent features of blockchain technology to connect hospitals, nursing institutions, doctors, drug distribution companies, and the elderly into a data network.
Realize online and offline interaction, remote service and connection of wearable devices, pension payment and usage tracking, and conveniently provide one-stop health management for the elderly A win-win "blockchain + pension" service system.
Substrate chain
< br>
Blockchain side:
Complete the pallet-sign-data sign data storage pallet;
Complete the pallet-health-ai health management pallet.
Client:
Complete user wallet registration login page ;
Complete the user binding device page;
Complete the user chronic disease maintenance page;
Complete the user chronic disease maintenance page;
p>
Complete user meal upload and identification;
Complete recommended meal query.
Backend:
Complete background service (device manufacturer , medical institutions, IOT, IPFS data docking);
Deposit equipment, medical data, and IPFS data chains through go-sdk;
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Baidu AI dish recognition.

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System Architecture
Tallone, Ezio, Ren Fengyi, Wei Xiaoping, Xu Jie, Jiang Hongchao, Adorine , Lu Xiaochuan
NFTicket
NFTicket is a decentralized ticketing system based on the ink! smart contract. Through NFTicket, event organizers can easily create events, sell tickets, and check tickets. Event participants can not only buy tickets to participate in the event, but also collect and trade event ticket NFT.
Smart Contract, DAPP
The product is completed, the technical solution design is completed, and the smart contract and front-end page are under development.
< br>
Frank, G, Yaren, Keene, Michael, psa, Tina
ONE PAPER
Through the decentralized storage method, the decentralized journal storage provides end-to-end encrypted highly decentralized information storage function, with low cost, high Security, making full use of idle resources and other advantages, may become the mainstream cloud storage solution in the future, promoting the sharing of papers and knowledge.
Blockchain, decentralized cloud storage, Substrate
IPFS protocol paper completed ;
Multiplayer 5+ deployment nodes completed;
One paper official website online;
One paper official website online;
p>
In the study of Substrate nodes, the basic node configuration is completed.
HDX, Russell, ZXY, Apta, Xiaoqiang, Xiao Ma
ExpanderGraph
< /p>
We are committed to mining the value of blockchain data. Provide data analysis and visualization services on the chain, and use algorithms to perform project rating, address labeling, address monitoring, risk control, etc., to assist users in making investment decisions. Establish a data sharing incentive mechanism based on the blockchain, and build a decentralized data element trading market.
Parachain, Blockchain Tools
Complete requirement analysis, product design, UI -Logo design;
Completed the development of the substrate parachain and data sharing incentive contract;
Back-end service program development, front-end page development (in progress)
p>
Xiao Guoliang, Zhu Kaiwen, Feng Xiaoyan, Peng Yuefei
CTT Chain
The full name of the CTT chain is the commercial trust transaction blockchain, which mainly serves the value transfer of traded goods. Commodity experience consumers interact with the CTT chain through the S2B2C-based e-commerce platform, and their experience results participate in the block competition in the form of commodity knowledge computing power.
The purpose of the CTT chain is to reach a consensus on the value of the product by experiencing the competition of consumers to experience the product, rather than the current mainstream advertising model. The S2B2C e-commerce platform sells goods and builds a new, low-cost distributed business model.
The project consists of three parts: Ctt chain, chain application, and chain management home page. The Ctt chain is developed based on substrate and is mainly responsible for the formation of a consensus on the value of commodities; the chain application is a set of S2B2C e-commerce programs that are responsible for the promotion and trading of commodities; the chain management homepage is to manage some off-chain work of the Ctt chain.
Parallel chain (independent chain)
At present, the project development has been completed and is in the Final testing session;
At the same time, the project is preparing for operation.
Chris p, Leah p, Charles Chen, Jay pne
OAK Network
This project is a dApp web application based on the self-developed quadratic donation pallet, which is convenient for users to use the pallet and participate in donation activities, and provides user interaction (message, like, comment, on-chain transaction query, donation data graphics, etc.) functions.
This quadratic voting is the general abbreviation for Constrained Liberal Radicalism Algorithm (hereinafter referred to as CLR). Proposed by Vitapk Buterin in 2018, CLR is a mechanism for crowdfunding matching of public goods (such as open source projects), and has been widely adopted on Ethereum through Gitcoin. Quadratic voting is the best ecosystem funding model realized through mathematical logic and democratic form. It will effectively provide donation funding for small network creators, thereby supporting the development of a large number of outstanding projects in the Polkadot ecosystem.
OAK Network will be the first to adopt the CLR module and apply it to the Polkadot ecosystem. With its own excellent scalability, it can also be built on Substrate in the future on other different blockchain networks.
The code logic and functions of the entire pallet include:
Provide 12 callable methods to provide services;
Use on-chain storage to store custom data structures;
p>
Customizable genesis block parameters;
Changeable module settings;
p>
Use substrate identity to provide identity verification function to filter bad participants;
provided benchmarking code, and completed benchmarking and transaction fee weight accuracy calculate.
The dApp webpage based on the self-developed quadratic donation pallet Application
pallet has been completed ;
Home Page Completed;
Project Details Page Completed;
p>
Like and comment functions are under development;
Donation voting functions are under development;
< p>The function of querying transfer records is under development.
Pan Xiaofeng: Captain, product design, blockchain development, TEE development Github: panxiaofeng418
Xiangshun: Client Development Github: 13207166252
Li Han: Blockchain development, TEE development Github: lh6120431
Li Yiping: Technical Support
Web3 Vanguard (Propagation is Mining APP)
< /p>
Because of the differences in policies of various countries, WEB3 applications are likely to face in the future, DNS will be hijacked, and the application Without the application market, in this case not only the user reach rate is not high, but also a lemon market (defective market, flood of malicious viruses) will be formed.
So we promote peer-to-peer communication and realize an APP where communication is mining. The APP ultimately manifests itself as a comprehensive autonomous platform integrating "PI token, browser, application market, decentralized vpn-cpent, wallet, and Defi". Tokens are mainly used to incentivize promotion.
One of the key points: In the process of point-to-point sharing and dissemination, ensure that the app is not tampered with. There are technical proofs such as TEE, and products have a design similar to the "safety circle" of PI tokens.
Goal: To become the best solution for general Internet users to connect to the anti-censorship Internet (one APP: solve network connection, solve high-quality anti-censorship website/APP efficient dissemination ).
Open hacking, building parachain + independent chain
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Complete "Minimized Functional Evaluation Version" 75%: p>
The first edition of the pallet has been completed, and the second edition is in progress;
The coding of app/h5 core processes and functions has been completed, and the test is being optimized again;
Proof of tamper-proof confidential computing POC: give a download address, in TEE Download the app and generate a report that verifies whether the app has been tampered with.
Guazi, Wenfeng Wang, Xi Wang, Robert Yan, Irene, Sunny Zhang, Armonio pang
Nutbox: Slot Auction Interface & Plugin
Nutbox is a decentralized slot auction tool. The user experience of the original official interface has been improved. The voting interface integrates project information and reward information, allowing voters to understand at a glance.
A slot auction organization tool for the community, through which the community can quantify voting results and verify the work of members. The community can motivate key figures in the community based on users' voting information and recommendation information.
This project is one of Nutbox's many DAO tool systems. It is positioned as The "WordPress" for DAOs, and its purpose is to allow non-technical DAO founders to easily create decentralized pledge applications, community DeFi, decentralized content applications, etc. through the protocol provided by Nutbox to launch DAOs.
4. The entry category:
Blockchain Tools
5. Project progress:
Support for Kusama Crowdloan has been realized, and Polkadot's Slot Auction will be supported.
1. Team members:
Thriver pu, Nov Rao, Pine Duan, Evelyn Ren
2. Project name:
Contract Chain
3. Project Introduction: < /p>
The contract chain is committed to solving the trust problem of inter-enterprise project cooperation.
Through the characteristics of data on the chain that cannot be tampered with, build a credit system for Party A and Party B based on the completion of historical contracts; Complete the delivery->release or arbitration" mode to solve the problem of unequal discourse rights in the early and late stages of bilateral cooperation; review miners obtain arbitration voting rights by pledging certain tokens, and use "pledge arbitration" to ensure the supervision and implementation of the contract. The block will reward those who vote fairly according to the arbitration result.
Issuing three NFT identity tokens of Party A, Party B, and review miners, and adjusting the identity credit value according to the results of each project involved, as the initiator of the new transaction refer to.
At the same time, because credit itself has value, we encourage the free trading of credit-anchored NFT identity tokens.
4. The entry category:
Smart Contract
5. Project progress: p>
The project structure design has been completed;
The UML design has been completed;
Contract body code logic is being written.
1. Team members
Frozen, Wendy, Hzm, Gala
2. Project name:
Pansub
3. Project Introduction:
< /p>
Pansub uses Substrate to build a blockchain to handle the file sharing ecology in the Web3 ecology, allowing users to achieve fast and convenient file transfer and sharing through the Chrome plug-in, and provides storage and bandwidth for sharing Get incentives to change the current trend of Internet 2.0 becoming more and more closed, so that everyone can use the decentralized services of Web 3.0 with the experience of Web 2.0.
4. Entry Category:
< /p>
Public chain
5. Project progress:
New project
1. Team members:
pu Cong: Product Design and UI Design
Jiang Jiacheng: Blockchain Engineer
< /p>
Ye pying: Market and Commerce
2. Project name:
Polkadot Name Systblockquote (PNS)
3. Project introduction:
PNS, the full name of Polkadot Name Systblockquote, is a decentralized domain name system based on the Polkadot platform. It will serve as the entrance of Web3, providing a safe, open and verifiable public domain name registration service.
PNS maintains a globally unique domain name through the registry on the parachain, assigns short and readable names to users, supports wallet address binding, and social identity binding , DApp website address. Domain names can be traded in the form of NFT assets. PNS supports DNS resolution, making every Substrate node a DNS server.
4. The entry category:
Infrastructure
5. Project progress: p>
The official website and product design have been completed;
The front-end development is nearing completion ;
Ethereum version is under development.
The above is a summary of the project information of the 22 teams participating in the second Polkadot Hackathon. From the construction of Polkadot's ecological chain to infrastructure construction, to development tools, and then to DAPP, it covers all directions of Polkadot's ecology.
It is these developers who are full of ideas and serious about building Polkadot that enrich the Polkadot ecology from all aspects. We hope that through this hackathon, we can support more developers with ideas and help developers realize their ideas and dreams.
The online preliminary review session will be held from July 6th to July 8th by Parity Engineer @Jimmy, Parity Engineer @周俊, Parity Asia Business and Operations by @Helena The three official judges select the finalists.
The results of the preliminary review will be announced on the official account on July 9th. Let us look forward to which teams will successfully participate in the Dblockquoteo Day in this hackathon. To all audiences Show off the results!
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