NFT POC

Tech Stack

Coding	Dev/Testing	Deployment	Public Access
Open Zeppelin Library	Hardhat	Truffle Teams	Open Zeppelin Defender Relay

Deployment

• CI/CD: Truffle Teams
• Access: OpenZeppelin Defender Relay

Testing Environment

Hardhat local node Hardhat Mainnet forking with Alchemy API

Development Environment

• Local: Hardhat
• Ci/CD: Truffle Teams

Using Hardhat Interface

• Typescript
• Hardhat
• Ether.js
• Waffle

Language

solidity 0.8.3

Scripts

Deploy(Local)

# Start local node on 127.0.0.1:8545
npx hardhat node

# Deploy
npx hardhat run --network localhost scripts/deploy.ts

Mint(Local)

# Mint a nft
export TOKEN_BASE_URI = http://localhost/; npx hardhat run --network localhost scripts/deploy.ts

Environment variables

# For hardhat
MNEMONIC=...
TOKEN_BASE_URI=http://localhost:3000/api/metadata/

# For NextJS
NEXT_PUBLIC_CONTRACT_ADDRESS=0x5FbDB2315678afecb367f032d93F642f64180aa3
APP_URL=http://localhost:3000

Issues

• Got type casting error with ./typechain build files, probably the ethers-v5 version problem dethcrypto/TypeChain#330, the workaround is manually adding @ts-ignore anywhere with type error.
• Transaction error, nonce height mismatch https://medium.com/singapore-blockchain-dapps/reset-metamask-nonce-766dd4c27ca8