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IoTeX首席赞助Gitcoin第十轮黑客松落幕

中文主网运行和链上生态

Charlie January 11, 2022, 7:31am 1

近日，由IoTeX首席赞助的Gitcoin第十届黑客松(GR10)圆满落下帷幕，IoTeX为参赛团队提供了资金和技术资源，助力Web3开发者在IoTeX网络上共同建设未来Web3的开源新生态。

本次黑客松从6月16日开始，一直到持续到7月7日。为了更好地向社区介绍此次大赛，吸引更多的开发人员加入，IoTeX核心开发团队举办一场主题为“用Web3在IoTeX上构建Dapp”的网络研讨会。在整个大赛中，IoTeX与来自全球各地20多个开发团队通力合作，在兼容web3的IoTeX平台上孵化了众多精彩项目！

IoTeX和其他顶级区块链项目一起赞助本次Gitcoin黑客松大赛，助力Web3快速发展！

第十轮黑客松获奖项目

我们为本次大赛准备了三个专项挑战和赏金奖励，让来自全球的开发团队围绕IoTeX Web3 通天塔API、ioTube跨链桥以及“Pebble原石”发挥创意，展现实力！经过多轮评选，三个优胜项目脱颖而出：

挑战一：用来自现实世界的数据为Dapp赋能

挑战详情：

github.com/iotexproject/halogrants

Power your dApp with Verifiable Real-world Data

opened 07:34PM - 24 May 21 UTC

## Power your dApp with Verifiable Real-world Data ## Welcome! Thank you for… your interest in IoTeX. You are welcome to participate in our competitions. Also, take a look at the other prizes: * Power your dApp with Verifiable Real-world Data (this prize) * [An Analytics Dashboard for our ioTube Bridge](https://github.com/iotexproject/halogrants/issues/39) * [Port your favorite dApp to IoTeX using Web3](https://github.com/iotexproject/halogrants/issues/40) Please <a href="https://discord.gg/gYkJ6EQVgu" target="_blank">join our Discord</a> to discuss the bounties. ## Bounty Prize **2500 USDT** to the most creative submission ## The Challenge [Pebble Tracker](https://docs.iotex.io/secure-hardware/pebble-tracker/overview) is a multi-sensor IoT board that converts real-world phenomena into verifiable, blockchain-ready data. We would like you to create a simple dApp that gets periodically fed by these verifiable data messages containing sensor values, verifies the message signature, and takes specific actions based on the sensor's values. Below we provide the basic specifications, but anyone is free to extend it and get creative: 1. Use our [Pebble Simulator](https://github.com/iotexproject/pebble-simulator) to generate a set of Pebble sensor data points along with their signature. 2. Create a smart contract that stores a list of "registered" devices. The contract owner can allow or block/delete devices. Anyone can "register" a new device (use the device IMEI and Public key for identification). 3. The contract should have a method to receive a Pebble data message and verify both data source device and data integrity. 4. The contract will reject data messages that come from non-whitelisted devices or whose signature is invalid. 5. For valid data messages, The contract will take some action based on the sensor values it received (e.g., store the latest values, transfer funds if a specific event is detected, etc...) 6. Create a frontend for the smart contract that allows users to log in with Metamask; allows any user to register a device, and the contract owner to allowlist, block, or delete registered devices, and displays any data relevant to the smart contract (e.g., display all devices, display latest data per device, display token transfers, contract balance, etc...) For the Smart Contract, you are required to use Solidity 0.5.13, for the frontend we suggest our [dApp sample](https://github.com/iotexproject/iotex-dapp-sample-v2) (though not a strict requirement) ## Acceptance Criteria - Code must be clear and well documented - Applicants work must be open-source on GitHub - Although simple, the frontend should be clean and pleasant - You will are allowed to be creative and build your own IoT data service, as long as all the functions described above are included - The dApp repository must include a detailed installation & usage guide - Additional grant via [Halo Program](http://halo.iotex.io/) if strongly exceeds expectation ## Judging Criteria - We will require a demo of the submission - We will assign the prize to the dApp that uses the IoT data in the most creative way # Misc/References ## Useful links - [Pebble Tracker Data Format](https://docs.iotex.io/secure-hardware/pebble-tracker/technical-specification#data-format) - [Pebble Tracker Simulator](https://github.com/iotexproject/pebble-simulator) - [IoTeX dApp Starter](https://github.com/iotexproject/iotex-dapp-sample-v2) - [ecrecover solidity function](https://docs.soliditylang.org/en/v0.5.13/solidity-by-example.html?highlight=ecrecover#recovering-the-message-signer-in-solidity) - [Strings concatenation in solidity](https://ethereum.stackexchange.com/questions/729/how-to-concatenate-strings-in-solidity) ## Pebble Message Verification **Important notice**: the simulator only support Linux and macOS Data message verification is the key concept behind the verifiability of Pebble Tracker data: you can both verify the *source* (i.e. the device public key) of the data, and the integrity of the data in one single step using the signature included in the Pebble Tracker data messages: ```js ... "signature": { "r":"4c05a4fa3eba782780a517ba03ef6fdd65e5b560a027808b47fcc6ed2b864169", "s":"05bde29104febe10c096c550b91f5d8ed2cf0d15fe48e164ee0e9765dda76f34" } ``` `r`and `s` are the two components of the elliptic curve signature (using secp256k1 curve) of the data message, obtained by signing the **keccak256 hash of the JSON object rendered to a string without any formatting**. A possible example to verify the message signature would be the following, using the solidity [ecrecover](https://docs.soliditylang.org/en/v0.5.13/solidity-by-example.html?highlight=ecrecover#recovering-the-message-signer-in-solidity) function: ```solidity // The verification function is called with all Pebble IoT data values, including the signature `r` and `s` components function receiveData(string temperature, string latitude, string longitude, ..., bytes32 r, bytes32 s) // buildJsonString should just rebuild the original pebble data message into an unformatted // json string using the data passed to receiveData(), and returns the string cast to bytes bytes32 hash = keccak256(buildJsonString(temperature, latitude, longitude, ...)); // Recover device address from the data message signature bool hit; address deviceAddress; // the signature version "v" can be either 27 or 28, the device does not provide it so // we test both of them for (uint8 v = 27; v < 29; v++) { deviceAddress = ecrecover(hash, v, r, s); if (whitelist[deviceAddress] == 1) { hit = true; break; } } ``` If `ecrecover()` returns a valid, non-zero address, this means that the data integrity is assured (i.e. the data passed to the contract correspond to those originally signed by the device). If the returned address is also included among the whitelisted devices then both the source and integrity of the data are verified, all is good and the contract can go ahead processing the sensors data (which is now **trusted data**!) and taking the specific actions required by the dApp. # IoTeX Useful Links **Discuss**: Please join our [Discord Dev Chat](https://discord.gg/gYkJ6EQVgu) to ask questions or reach out to `Simone_IoTeX` on Discord if you need any help. **Docs**: [IoTeX Docs](https://docs.iotex.io) | [Ethereum Compatibility](https://docs.iotex.io/software-tools/ethereum-tools) | [DID](https://docs.iotex.io/middleware-1/decentralized-identity) | [Full Nodes](https://community.iotex.io/t/official-iotex-delegates-thread/1263) **Follow Us**: [iotex.io](https://iotex.io) | [Telegram](https://t.me/IoTeXGroup) | [Twitter](https://twitter.com/iotex_io) | [Medium](https://medium.com/@iotex) | [Reddit](https://www.reddit.com/r/IoTeX)

获奖项目：空气质量监测Dapp(demo, repo)，开发者：jpick713 这是一款空气质量监测dApp，提供多个级别的权限，能够进行设备注册以及管理白名单设备，通过设置“空气质量合约”的最小和最大阈值来进行空气质量的监测。我们期待看到由“Pebble原石”赋能的这款Dapp正式上线！

demo：

https://www.youtube.com/watch?v=qqDtAz8z9Xo

repo：

GitHub - jpick713/Kiln-Tracker-dApp: dApp uses pebble tracker to make decisions from trusted IoT data

jpick713：

jpick713 · GitHub

挑战二：ioTube跨链桥数据可视化工具

挑战详情：

github.com/iotexproject/halogrants

An Analytics Dashboard for our ioTube Bridge

opened 10:29AM - 14 Jun 21 UTC

## ioTube Bridge Analytics Dashboard ## Welcome! Thank you for your interest i…n IoTeX. You are welcome to participate in our competitions. Also, take a look at the other prizes: * [Power your dApp with Verifiable Real-world Data](https://github.com/iotexproject/halogrants/issues/36) * An Analytics Dashboard for our ioTube Bridge (this prize) * [Port your favorite dApp to IoTeX using Web3](https://github.com/iotexproject/halogrants/issues/40) Please <a href="https://discord.gg/gYkJ6EQVgu" target="_blank">join our Discord</a> to discuss the bounties. ## Bounty Prize: up to 4000 USDT Depending on the number of statistics provided. ## The Challenge [ioTube](https://tube.iotex.io) is a **decentralized**, multi-asset, cross-chain **bridge** that connects IoTeX to popular networks like Ethereum, Binance Smart chain and Polygon (Matic). We would like to see a complete Analytics Dashboard with a sleek design for ioTube, showing the most relevant statistics for the bridge (volumes, tx count, users, and much more), categorized by the chain. ## Acceptance Criteria - The dApp must include statistics for all tokens and all 3 bridged chains - Code must be clear and well documented - Applicants work must be open-source on GitHub - The frontend should be clean and pleasant - The dApp repository must include a detailed installation & usage guide ## Judging Criteria - We will require a demo of the submission - We will assign the prize to the richest analytics that fulfills the acceptance criteria. ## References ### Get inspired - [Duneanalytics](https://duneanalytics.com/zavodil/rainbow-bridge) - [IoTeX Staking Stats](https://iotex.smartstake.io/) ### Useful links - ioTube contract addresses: [Ethereum](https://github.com/iotexproject/ioTube/blob/master/README.md#tube-of-iotex---ethereum), [BSC](https://github.com/iotexproject/ioTube/blob/master/README.md#tube-of-iotex---bsc-binance-smart-chain), [Polygon](https://github.com/iotexproject/ioTube/blob/master/README.md#tube-of-iotex---polygon-formerly-matic) - ioTube Bridge [Frontend](tube.iotex.io) - ioTube Bridge Contract (see on [iotexscan.io](https://iotexscan.io/address/io12s9f9hv4zsr7umy5hxt6g0k0xr4x6pxdp5w998), see on [iotexscout.io](https://iotexscout.io/address/io12s9f9hv4zsr7umy5hxt6g0k0xr4x6pxdp5w998)) - IoTeX⟷Ethereum Address [format converter](http://member.iotex.io/tools/address-convert) ([alternative](https://iotexlab.io/eth2io)) - Develop using [Ethereum Tools](https://docs.iotex.io/software-tools/ethereum-tools) ## IoTeX Useful Links **Discuss**: Please join our [Discord Dev Chat](https://discord.gg/gYkJ6EQVgu) to ask questions or reach out to `Simone_IoTeX` on Discord if you need any help. **Docs**: [IoTeX Docs](https://docs.iotex.io) | [Ethereum Compatibility](https://docs.iotex.io/software-tools/ethereum-tools) | [DID](https://docs.iotex.io/middleware-1/decentralized-identity) | [Full Nodes](https://community.iotex.io/t/official-iotex-delegates-thread/1263) **Follow Us**: [iotex.io](https://iotex.io) | [Telegram](https://t.me/IoTeXGroup) | [Twitter](https://twitter.com/iotex_io) | [Medium](https://medium.com/@iotex) | [Reddit](https://www.reddit.com/r/IoTeX)

获奖项目：ioTube可视化工具(demo,repo)，开发者：skhiearth & simmsss 这是一款非常实用的可视化工具，可以清晰了解ioTube上IoTeX和以太坊、BSC以及Polygon之间的双向通证交换活动。这款工具可配置程度高，信息详细，可以极大提升ioTube的用户体验！

demo：

https://iotube-dashboard.herokuapp.com/

repo：

GitHub - skhiearth/IoTube-Analytics: Source code for the IoTube Bridge Analytics dashboard by The Misfits for Grants Round 10 Hackathon by Gitcoin and IoTeX

skhiearth：

skhiearth (Utkarsh Sharma) · GitHub

simmsss：

simmsss (Simran Gogia) · GitHub

挑战三： 使用Web3将Solidity Dapp移植到IoTeX网络

挑战详情：

github.com/iotexproject/halogrants

Port your favorite dApp to IoTeX using Web3

opened 03:47PM - 14 Jun 21 UTC

## Port your favorite dApp to IoTeX using Web3 ## Welcome! Thank you for you…r interest in IoTeX, you are welcome to participate in our competitions. Also, take a look at the other prizes: * [Power your dApp with Verifiable Real-world Data](https://github.com/iotexproject/halogrants/issues/36) * [An Analytics Dashboard for our ioTube Bridge](https://github.com/iotexproject/halogrants/issues/39) * Port your favorite dApp to IoTeX using Web3 (this prize) Please <a href="https://discord.gg/gYkJ6EQVgu" target="_blank">join our Discord</a> to discuss the bounties. ## Bounty Prize: 9000 USDT maximum. We will pick **up to 5 winners**. Prizes amount will depend on the project complexity. The total amount of prizes for all winners will not exceed 9000 USDT. ## The Challenge IoTeX is a highly decentralized, scalable, and Ethereum-Compatible blockchain platform. We would like you to make use of Web3 tools to port your favorite dApp to IoTeX. **This is an open-ended competition:** simply pick your favorite dApp on Ethereum, or Binance Smart Chain, or any other platform and just deploy it to IoTeX! ## Acceptance Criteria - Code must be clear and well documented - Applicants work must be open-source on GitHub - The frontend should be clean and pleasant - The dApp repository must include a detailed installation & usage guide - Additional grant via [Halo Program](http://halo.iotex.io/) if you run and operate this dApp ## Judging Criteria - We will select **up to 5 projects** that have fulfilled the acceptance criteria - The amount of the prize is evaluated based on the complexity and quality of your work ## References ### Examples [Disperse](https://disperse.app/) (Low complexity) [Ampleforth](https://www.ampleforth.org/) (Medium complexity) [Sushi Swap](https://sushi.com) (Medium complexity) [Opensea](https://opensea.io/assets) (High complexity) [MakerDAO](https://makerdao.com/en/) (High complexity) ### Useful links Develop using [Ethereum Tools](https://docs.iotex.io/software-tools/ethereum-tools) # IoTeX Useful Links **Discuss**: Please join our [Discord Dev Chat](https://discord.gg/gYkJ6EQVgu) to ask any questions or reach out to `Simone_IoTeX` on Discord if you need any help. **Docs**: [IoTeX Docs](https://docs.iotex.io) | [Ethereum Compatibility](https://docs.iotex.io/software-tools/ethereum-tools) | [DID](https://docs.iotex.io/middleware-1/decentralized-identity) | [Full Nodes](https://community.iotex.io/t/official-iotex-delegates-thread/1263) **Follow Us**: [iotex.io](https://iotex.io) | [Telegram](https://t.me/IoTeXGroup) | [Twitter](https://twitter.com/iotex_io) | [Medium](https://medium.com/@iotex) | [Reddit](https://www.reddit.com/r/IoTeX)

获奖项目：“Disperse”多发送Dapp(Demo, Repo)，开发者：Rafat 最近大热的通证多发送Dapp已经正式登陆IoTeX网络！在这个项目中，去中心化的Solidity智能合约通过通天塔Web3 API完美移植到IoTeX网络上，并与一个简单但功能强大的前端成功匹配。

demo：

https://awesome-torvalds-4365b5.netlify.app/

repo：

http://encoderafat/disperse

Rafat：

https://gitcoin.co/profile/rafat

获奖项目：社交网络Dapp (Demo, Repo)，开发者：piyush 区块链Academy的智能合约+UI通过通天塔Web3 API成功移植到IoTeX网络上，展示了IoTeX未来在社交媒体领域的发展潜力！

demo：

https://socialnetwork-ebon.vercel.app/

repo：

GitHub - Developer-piyush/DAPP_IOTEX

developer-piyush：

https://gitcoin.co/developer-piyush

荣誉奖

我们由衷的感谢所有参赛的开发人员，这次黑客松时间较短，我们非常希望所有参赛团队可以通过IoTeX Halo开发社区激励计划继续完善项目，IoTeX社区等待你的创意和作品：

ioTube Analytics (demo, repo) 开发者： seyedrezafar & hhio618

demo：

https://iotube-analytics.github.io/react-iotube-analytics

repo：

GitHub - BitCloud-Live/go-iotube-analytics: Iotube bridge analytics and API

seyedrezafar：

https://github.com/seyedrezafar

hhio618：

hhio618 (Homayoun) · GitHub

ioTube Analytics (demo, repo) 开发者： dapiguabc

demo：

https://iotube-analytics.github.io/react-iotube-analytics

repo：

GitHub - Dapiguabc/iotube-analysis: A dashboard for iotube.

dapiguabc：

https://gitcoin.co/profile/dapiguabc

Drive Slow/Safe Dapp (demo, repo) 开发者： nicky-ru

demo：

https://gitcoin.co/profile/nicky-ru

repo：

GitHub - nicky-ru/drive-slow-safe: This is my Dapp for G10 hackathon. Main idea: a decentralized insurance application powered by verifiable real-world data (IoTeX Pebble Tracker).

nicky-ru：

https://gitcoin.co/profile/nicky-ru

NFT 市场 (demo, repo) 开发者： thevanquiser

demo：

https://dapps-marketplace-nfts-iotex.web.app/

repo：

GitHub - TheVanquiser/Dapps-market-place-NFTs-to-IoTeX: THIS IS A DAPPS MARKET PLACE FOR NFTS MARKET PLACE BOUNTY AND HACKATHON gITCOIN

thevanquiser：

https://gitcoin.co/profile/thevanquiser

社区投票Dapp (repo) 开发者： Gitcoin-Developer

repo：

https://github.com/GITCOINDEVELOPER/ITXVOTE

Gitcoin-Developer：

https://gitcoin.co/profile/gitcoindeveloper

Sushiswap 脚本部署 (repo) 开发者： hhio618

repo：

GitHub - hhio618/iotex-sushiswap-deployer: Deploy sushiswap on top of IoTeX network

hhio618：

https://gitcoin.co/profile/hhio618

开发者召集令！

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实用链接: