Onchain Summer Postcards
🌞 Mint summer memories as NFT postcards
About
The problem it solves Most onchain projects feel abstract and technical, making it hard for new users to emotionally connect with them. Onchain Summer Postcards solves this by offering a simple, fun way to create and collect memories directly on Base. Instead of complicated DeFi or trading apps, users can just connect a wallet, write a message, and mint it as a permanent NFT postcard. It lowers the barrier to entry for beginners while showing the cultural side of building onchain. Smart Contract Address(es) SummerPostcard (NFT contract) 0x8546afE98172Da80097F581D5B6F3cfdD14938Eb Other Onchain Proof 
How it's made
Challenges we ran into • Hardhat v3 migration: Ran into dependency errors with v2, solved by restarting with v3 setup. • Ethers v6 integration: Old tutorials broke; fixed by updating imports and types for wagmi v2 + ethers v6. • Frontend wallet connection: RainbowKit errors due to mixing old docs; resolved with wagmi v2 injected MetaMask connector. • Env handling: Scripts didn’t pick up .env solved by adding dotenv/configand using .env.example. • Deployment & hosting: Blank page on Vercel; fixed by setting root to postcard-frontend and adding env vars.