Token Crunchy

frontend/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+
+/lib/generated/prisma

frontend/README.md

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+This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.

frontend/app/api/auth/check-user/route.ts

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+import { NextRequest, NextResponse } from 'next/server'
+import { prisma } from '../../../../lib/prisma'
+
+export async function POST(request: NextRequest) {
+  try {
+    const body = await request.json()
+    const { walletAddress } = body
+
+    // Validate required fields
+    if (!walletAddress) {
+      return NextResponse.json(
+        { error: 'Missing wallet address' },
+        { status: 400 }
+      )
+    }
+
+    // Validate wallet address format
+    if (!walletAddress.startsWith('0x') || walletAddress.length !== 42) {
+      return NextResponse.json(
+        { error: 'Invalid wallet address format' },
+        { status: 400 }
+      )
+    }
+
+    // Check if user exists
+    const user = await prisma.user.findUnique({
+      where: { walletAddress: walletAddress.toLowerCase() },
+      select: {
+        id: true,
+        walletAddress: true,
+        nickname: true
+      }
+    })
+
+    return NextResponse.json({
+      success: true,
+      userExists: !!user,
+      nickname: user?.nickname || null
+    })
+
+  } catch (error) {
+    console.error('User check error:', error)
+    return NextResponse.json(
+      { error: 'Failed to check user' },
+      { status: 500 }
+    )
+  }
+}

frontend/app/api/auth/connect/route.ts

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+import { NextRequest, NextResponse } from 'next/server'
+import { verifyWalletSignature, createOrUpdateUser } from '@/lib/auth'
+import { validateRequestBody, walletConnectSchema } from '@/lib/validation'
+import { handleApiError } from '@/lib/errors'
+
+export async function POST(request: NextRequest) {
+  try {
+    const body = await request.json()
+    const { walletAddress, signature, message, nickname } = validateRequestBody(
+      walletConnectSchema,
+      body
+    )
+
+    // Verify wallet signature
+    const authResult = await verifyWalletSignature(walletAddress, signature, message)
+
+    if (!authResult.isValid) {
+      return NextResponse.json(
+        { error: authResult.error },
+        { status: 401 }
+      )
+    }
+
+    // Create or update user with custom nickname if provided
+    const user = await createOrUpdateUser(walletAddress, nickname)
+
+    return NextResponse.json({
+      success: true,
+      user,
+      message: 'Wallet connected successfully'
+    })
+
+  } catch (error) {
+    const { error: errorMessage, statusCode } = handleApiError(error)
+    return NextResponse.json(
+      { error: errorMessage },
+      { status: statusCode }
+    )
+  }
+}
+
+// Generate authentication message
+export async function GET(request: NextRequest) {
+  try {
+    const { searchParams } = new URL(request.url)
+    const walletAddress = searchParams.get('walletAddress')
+
+    if (!walletAddress) {
+      return NextResponse.json(
+        { error: 'Wallet address is required' },
+        { status: 400 }
+      )
+    }
+
+    const timestamp = Date.now()
+    const message = `Welcome to Token Crunchies!\n\nSign this message to authenticate your wallet.\n\nWallet: ${walletAddress}\nTimestamp: ${timestamp}\n\nThis request will not trigger a blockchain transaction or cost any gas fees.`
+
+    return NextResponse.json({
+      message,
+      timestamp
+    })
+
+  } catch (error) {
+    const { error: errorMessage, statusCode } = handleApiError(error)
+    return NextResponse.json(
+      { error: errorMessage },
+      { status: statusCode }
+    )
+  }
+}

frontend/app/api/auth/profile/route.ts

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+import { NextResponse } from 'next/server'
+import { withAuth } from '../../../../lib/middleware/auth'
+import { prisma } from '../../../../lib/prisma'
+
+export const GET = withAuth(async (request, user) => {
+  try {
+    // Get detailed user profile
+    const userProfile = await prisma.user.findUnique({
+      where: { id: user.id },
+      select: {
+        id: true,
+        walletAddress: true,
+        nickname: true,
+        totalTokens: true,
+        qrCodesScanned: true,
+        currentPhase: true,
+        lastScannedAt: true,
+        createdAt: true,
+        scannedQRs: {
+          select: {
+            id: true,
+            tokensEarned: true,
+            scannedAt: true,
+            transactionHash: true,
+            transferStatus: true,
+            qrCode: {
+              select: {
+                name: true,
+                rarity: true,
+                phase: true,
+                sequenceOrder: true
+              }
+            }
+          },
+          orderBy: {
+            scannedAt: 'desc'
+          }
+        }
+      }
+    })
+
+    if (!userProfile) {
+      return NextResponse.json(
+        { error: 'User not found' },
+        { status: 404 }
+      )
+    }
+
+    // Get leaderboard position
+    const leaderboardEntry = await prisma.leaderboardEntry.findUnique({
+      where: { userId: user.id },
+      select: {
+        rank: true,
+        rareQRsScanned: true,
+        legendaryQRsScanned: true
+      }
+    })
+
+    // Calculate phase progress
+    const phaseProgress = await calculatePhaseProgress(user.id, userProfile.currentPhase)
+
+    return NextResponse.json({
+      success: true,
+      profile: {
+        ...userProfile,
+        totalTokens: userProfile.totalTokens.toString(),
+        scannedQRs: userProfile.scannedQRs.map(scan => ({
+          ...scan,
+          tokensEarned: scan.tokensEarned.toString()
+        })),
+        leaderboard: leaderboardEntry,
+        phaseProgress
+      }
+    })
+
+  } catch (error) {
+    console.error('Profile fetch error:', error)
+    return NextResponse.json(
+      { error: 'Failed to fetch profile' },
+      { status: 500 }
+    )
+  }
+})
+
+async function calculatePhaseProgress(userId: string, currentPhase: string) {
+  // Get total QRs in current phase
+  const totalQRsInPhase = await prisma.qRCode.count({
+    where: {
+      phase: currentPhase as 'PHASE_1' | 'PHASE_2' | 'PHASE_3',
+      isActive: true
+    }
+  })
+
+  // Get scanned QRs in current phase
+  const scannedQRsInPhase = await prisma.userQRScan.count({
+    where: {
+      userId,
+      qrCode: {
+        phase: currentPhase as 'PHASE_1' | 'PHASE_2' | 'PHASE_3',
+        isActive: true
+      }
+    }
+  })
+
+  // Get next required QR (lowest sequence order not yet scanned)
+  const nextQR = await prisma.qRCode.findFirst({
+    where: {
+      phase: currentPhase as 'PHASE_1' | 'PHASE_2' | 'PHASE_3',
+      isActive: true,
+      scannedBy: {
+        none: {
+          userId
+        }
+      }
+    },
+    orderBy: {
+      sequenceOrder: 'asc'
+    },
+    select: {
+      id: true,
+      name: true,
+      sequenceOrder: true,
+      rarity: true,
+      hint: {
+        select: {
+          title: true,
+          content: true
+        }
+      }
+    }
+  })
+
+  return {
+    currentPhase,
+    totalQRs: totalQRsInPhase,
+    scannedQRs: scannedQRsInPhase,
+    progress: totalQRsInPhase > 0 ? (scannedQRsInPhase / totalQRsInPhase) * 100 : 0,
+    nextQR,
+    isPhaseComplete: scannedQRsInPhase >= totalQRsInPhase
+  }
+}