For learning, I have developed an Ethereum Dapp based on “Blockchain-Based Solution for Distribution and Delivery of COVID-19 Vaccines” research paper written by by Ahmad Musamih, Raja Jayaraman, Khaled Salah, Haya R Hasan, Ibrar Yaqoob, Yousof Al-Hammadi. They also provided smart contract, written in solidity, for public use, so I changed it a little bit and used it for developing Dapp.
Overview:
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There are four roles, manufacturer, distributor, container and vaccination center. Roles' permissions are managed by solidity modifiers
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Manufacturer can create containers and add distributor.
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Distributor can start and end delivery of containers.
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Container can call violation events like rise in temperature, exposure to light etc.
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Vaccination center can receive containers.
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Based on these transactions events will be triggered. Anyone can track the current status of the container.
Features I added: -
In original contract only one vaccine container could be tracked but I added option to track multiple containers.
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Restructured code and divided it into multiple contracts.
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Tweaked vaccine container events and violation events.
For development:
- Ganache is used as local blockchain.
- Dapp is create by truffle react box.
- Metamask wallet is used for account and private keys.
- React Material UI for user interface.
Github link for original smart contract: https://lnkd.in/dRNP8_uc Research paper can be found on IEEE Xplore.