It uses limiter to process submition and nft selection in single thread, so no double mints or collisions occur. For this reason, you should NOT use serverless environment like Vercel to host this solution, but rather use app instance/vps.
run yarn
Create a .env file with your database url. e.g.:
DATABASE_URL="file:./test.db" for a sqlite database
You can specify your database provider inside the prisma/schema.prisma file.
Then run yarn prisma seed to seed the database with the NFT collections data. If you want to use custom NFT metadata, you can do so by editing the mint.ts file.
In the next.config.js file, enter your blockfrost API key. You must set a value for the NETWORK: 0 for testnet or 1 for mainnet.
Run yarn dev, then go to localhost:3000/api/createKeysAndPolicy
Replace the values inside the mint variable in mint.ts by those obtained in the api response (do not paste the secret key here).
You can also set the reservation time and minting price inside this mint variable.
Copy the key and add it as environment variable inside next.config.js