🎁 WinDrop

Gift Megapot lottery tickets to any wallet on Base. Pick a ticket count, drop in a recipient address, and send them a shot at the jackpot — one tap, non-custodial, referrer-free.

Built with Next.js 15 (App Router) + React 19, Privy auth wired through wagmi, viem, and Tailwind CSS.

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How it works

Gifting a ticket runs a two-step on-chain flow on Base (chain 8453):

1. USDC approve — approve the Megapot ticket buyer to spend your USDC (only when the existing allowance is too low).
2. buyTickets(_referrer, _value, _recipient) — buy tickets for the recipient, passing address(0) as the referrer.

Ticket price is 1 USDC each.

Contracts (Base mainnet)

Contract	Address
USDC (6 decimals)	0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
JackpotRandomTicketBuyer	0xb9560b43b91dE2c1DaF5dfbb76b2CFcDaFc13aBd

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Getting started

1. Install

npm install

2. Configure environment

Copy the example env file and add your Privy app ID:

cp .env.example .env.local

Variable	Required	Description
NEXT_PUBLIC_PRIVY_APP_ID	✅	App ID from dashboard.privy.io
NEXT_PUBLIC_BASE_RPC_URL	—	Custom Base RPC (defaults to the public mainnet.base.org)

Without a valid NEXT_PUBLIC_PRIVY_APP_ID, the app renders a friendly setup screen instead of crashing.

3. Run

npm run dev

Open http://localhost:3000.

4. Production build

npm run build

The build must pass compile, typecheck, lint, and prerender.

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Project structure

app/
  layout.tsx        Root layout + fonts + dark/light bootstrap
  page.tsx          Main gift page
  providers.tsx     Client-only Privy → wagmi → react-query stack
components/
  TicketSelector.tsx  Ticket count, presets, +/− stepper, 🎲 surprise
  RecipientInput.tsx  Validated 0x address input
  GiftButton.tsx      Live transaction status button
  SuccessModal.tsx    Confetti + Basescan receipt
hooks/
  useGiftTickets.ts   Balance → allowance → approve → buyTickets flow
lib/
  abi.ts        ERC-20 + ticket buyer ABI fragments
  constants.ts  Addresses, chain, ticket config
  wagmi.ts      wagmi/Privy config
  format.ts     USDC + address formatting helpers

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Notes

• The Privy/wagmi provider stack renders client-only (gated on a mounted flag) so static generation doesn't try to initialize Privy at build time.
• next.config.mjs pushes pino-pretty, lokijs, and encoding to webpack externals and stubs @react-native-async-storage/async-storage to silence optional-dependency warnings from wagmi / wallet SDKs.

Deployment

The site deploys to Vercel (native Git integration) and the extension to the Chrome Web Store (GitHub Actions). See DEPLOY.md for the full setup (environment variables and the publish flow). Set NEXT_PUBLIC_SITE_URL to your deployed URL so social/OG tags resolve correctly.

The marketing landing (/) renders without wallet config; only the /gift app requires NEXT_PUBLIC_PRIVY_APP_ID.

Branding

The full brand kit — color palette, logo/marks, taglines, favicon, and social preview — lives in branding/BRANDING.md. Logo SVGs are in public/ and app/icon.svg; the Open Graph image is public/og-image.png.

Roadmap

• Gift by X (Twitter) username → resolved wallet
• Browser extension for one-click gifting anywhere

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Powered by Megapot on Base. Not affiliated with Megapot; use at your own risk.