Reown

# Base network: "testnet" (Base Sepolia, default) or "mainnet" (Base Mainnet)
NEXT_PUBLIC_NETWORK=testnet

NEXT_PUBLIC_REOWN_PROJECT_ID=your_project_id_here

# Your deployed contract address
NEXT_PUBLIC_CONFLOTTERY_ADDRESS=<deployed_contract_address>

"use client";

import { ReactNode, useState, useEffect } from "react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { WagmiProvider, type Config } from "wagmi";
import { createAppKit } from "@reown/appkit/react";
import { WagmiAdapter } from "@reown/appkit-adapter-wagmi";
import { ThemeProvider } from "next-themes";
import { activeChain } from "@/lib/network";

const queryClient = new QueryClient();

const projectId = process.env.NEXT_PUBLIC_REOWN_PROJECT_ID || "";

let wagmiAdapter: WagmiAdapter | null = null;
let isAppKitInitialized = false;

function initializeAppKit() {
  if (isAppKitInitialized || !projectId) return;

  wagmiAdapter = new WagmiAdapter({
    networks: [activeChain],
    projectId,
    ssr: true,
  });

  createAppKit({
    adapters: [wagmiAdapter],
    networks: [activeChain],
    projectId,
    features: {
      analytics: true,
    },
    themeMode: "dark",
  });

  isAppKitInitialized = true;
}

const Providers = ({ children }: { children: ReactNode }) => {
  const [mounted, setMounted] = useState(false);

  useEffect(() => {
    if (!projectId) {
      console.warn(
        "Missing NEXT_PUBLIC_REOWN_PROJECT_ID. Get one at https://cloud.reown.com/"
      );
    } else {
      initializeAppKit();
    }
    setMounted(true);
  }, []);

  if (!projectId) {
    return (
      <ThemeProvider attribute="class" defaultTheme="dark" enableSystem>
        <div className="min-h-screen flex items-center justify-center">
          <div className="text-center p-6 border border-border">
            <p className="text-muted-foreground mb-2">Missing configuration</p>
            <p className="text-sm text-muted-foreground">
              Add NEXT_PUBLIC_REOWN_PROJECT_ID to your .env file
            </p>
          </div>
        </div>
      </ThemeProvider>
    );
  }

  if (!mounted || !wagmiAdapter) {
    return (
      <ThemeProvider attribute="class" defaultTheme="dark" enableSystem>
        <div className="min-h-screen" />
      </ThemeProvider>
    );
  }

  return (
    <ThemeProvider attribute="class" defaultTheme="dark" enableSystem>
      <WagmiProvider config={wagmiAdapter.wagmiConfig as Config}>
        <QueryClientProvider client={queryClient}>
          {children}
        </QueryClientProvider>
      </WagmiProvider>
    </ThemeProvider>
  );
};

export { Providers };

import { getIncoLightning } from "@/lib/network";
import { handleTypes } from "@inco/lightning-js";
import { useAccount, useWalletClient } from "wagmi";
import { parseEther } from "viem";

const { address } = useAccount();
const { data: walletClient } = useWalletClient();

// Network (Base Sepolia / Mainnet) is selected centrally in lib/network.ts via NEXT_PUBLIC_NETWORK.
const zap = await getIncoLightning();

// Encrypt a value before sending on-chain
const ciphertext = await zap.encrypt(parseEther(amount), {
  accountAddress: address,
  dappAddress: LOTTERY_ADDRESS,
  handleType: handleTypes.euint256,
});

// Decrypt a handle with attestation (e.g. check if the user won)
const [result] = await zap.attestedDecrypt(walletClient, [encryptedHandle]);
const isWinner = result.plaintext.value; // boolean for an ebool handle