README.md

Khyber Farm

This repository provides a DAI staking mechanism; whereby, the user receives KhyberToken as a reward for staking DAI in the contract. Furthermore, the user can purchase a KHRYSTAL NFT through the NFT factory named Khyber Crystal. The KhyberTokens are sent to a lottery pool inside the Lottery contract. Finally, each NFT includes a tokenId which acts as a lottery ticket. The lottery feature uses Chainlink's VRF to provide a verifiably random number. The winner receives the contents of the lottery pool.

P02T4.mp4

Prerequisites

NodeJS and NPM >= 7.5.0

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Installation

In directory root:

npm i

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Testing

npx hardhat test

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Deployment

Prerequisites

This dApp accepts DAI as its staking token; therefore, you'll need to acquire Kovan DAI if you deploy to Kovan (as it's preconfigured). To attain kDAI, you'll need to lock kETH in a Maker vault in exchange for kDAI.

• Network Provider
  • Infura.io
  • Alchemy.com
• MetaMask
  • MetaMask.io
• Kovan DAI
  • https://oasis.app/borrow?network=kovan
• Kovan LINK
  • https://kovan.chain.link/

The Hardhat configuration file and scripts have been set up to deploy on the Kovan testnet. Use the .env_sample as a template for the requisite API_KEY and PRIVATE_KEY. Infura and Alchemy offer free API access to testnets and mainnet. Once you have an API endpoint and your private key from MetaMask, create a dotenv file within the KhyberFarm root:

touch .env

Populate the .env with your API_KEY and PRIVATE_KEY.
*If you're posting on GitHub, DO NOT FORGET to .gitignore the dotenv(.env) file!

Uncomment out the Kovan network details in hardhat.config.ts:

networks: {
    kovan: {
        gas: "auto",
        gasPrice: "auto",
        url: process.env.API_KEY_KOVAN,
        accounts: [`0x${process.env.PRIVATE_KEY}`]
    },
    rinkeby: {
        gas: "auto",
        gasPrice: "auto",
        url: process.env.API_KEY_RINKEBY,
        accounts: [`0x${process.env.PRIVATE_KEY}`]
    }
  }

In the KhyberFarm root, run:

npx hardhat run scripts/deployFarm.ts --network rinkeby

Todo (for school-end wrap up)

• add connect wallet button
• modify contract so as to see nft on opensea