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https://github.com/masaun/diploma-nfts-with-chainlink-vrf
Diploma-NFTs with Chainlink-VRF. This is a smart contract that give graduates a diploma of schools (such as college, university, etc) which is published as a NFT with a random number (randomness) generated by Chainlink-VRF (Verifiable Random Function)
https://github.com/masaun/diploma-nfts-with-chainlink-vrf
chainlink-vrf ethersjs hardhat solidity
Last synced: about 2 months ago
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Diploma-NFTs with Chainlink-VRF. This is a smart contract that give graduates a diploma of schools (such as college, university, etc) which is published as a NFT with a random number (randomness) generated by Chainlink-VRF (Verifiable Random Function)
- Host: GitHub
- URL: https://github.com/masaun/diploma-nfts-with-chainlink-vrf
- Owner: masaun
- License: mit
- Created: 2021-11-04T10:30:45.000Z (about 3 years ago)
- Default Branch: main
- Last Pushed: 2022-04-30T15:49:50.000Z (almost 3 years ago)
- Last Synced: 2024-10-18T20:39:29.279Z (3 months ago)
- Topics: chainlink-vrf, ethersjs, hardhat, solidity
- Language: JavaScript
- Homepage:
- Size: 420 KB
- Stars: 3
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Diploma-NFTs with Chainlink-VRF
## 【Overview】
- This is a smart contract that give graduates a diploma of schools (such as college, university, etc) which is published as a `NFT` with a `random number (randomness)` generated by `Chainlink-VRF (Verifiable Random Function) `
- By using that,
- Schools (such as college, university, etc) can give graduates truly unique diploma.
- Graduates can utilize their diploma as a proof for various opportunities.
## 【Workflow】
- Diagram of workflow
## 【Tech Stack】
- Solidity (Solc): v0.7.6
- Hardhat: v2.6.4
- ethers.js: v5.0.24
- @chainlink/contracts: v0.2.2
- Node.js: v16.7.0
etc...
## 【Setup (Installation)】
- ① Add `.env` file to the root directory.
(Please `.env.example` for creating `.env` file)
- ② Install modules
```
yarn
```
## 【Script】
- Execute the script file ( `./scripts/GraduatesRegistry.script.js` ) that includes the whole scenario of this smart contracts.
- [NOTE]: In advance, your executor address of this script must have more that 0.1 LINK for sending a request to Chainlink-VRF and some ETH for executing transactions
- [NOTE]: At the moment, deployed-addresses on Kovan of 2 smart contracts below are used in the script file ( `./scripts/GraduatesRegistry.script.js` ). If you want to attemp to new contract addresses on Kovan, please use the script for deployment ( https://github.com/masaun/diploma-NFTs-with-chainlink-VRF#deployment ).
- DiplomaNFTFactory.sol: `"0xE1538ee65808dC992c22fd656C4CFf08350BBb9F"`
- GraduatesRegistry.sol: `"0xAcEa79FC1cF702C6A7F39823905d988E69784AD3"`
```
yarn script-kovan:GraduatesRegistry
```
## 【Deployment】
- Deploy 2 smart contracts on Kovan testnet
- DiplomaNFTFactory.sol
- GraduatesRegistry.sol
```
yarn script-kovan:Deploy
```
## 【Demo Video】
- This is the demo video that show executing the script file (which include whole scenario) above.
https://youtu.be/pnKU3xVnjcw
## 【References】
- Chainlink VRF:
- Document: https://docs.chain.link/docs/chainlink-vrf/
- Example Repo:
- Chainlink Hardhat Box (hardhat-starter-kit): https://github.com/smartcontractkit/hardhat-starter-kit
- Articles:
- How to Build Dynamic NFTs on Polygon:
https://blog.chain.link/how-to-build-dynamic-nfts-on-polygon/
- 16 Ways to Create Dynamic Non-Fungible Tokens (NFT) Using Chainlink Oracles:
https://blog.chain.link/create-dynamic-nfts-using-chainlink-oracles/