diff --git a/.dockerignore b/.dockerignore new file mode 100644 index 0000000..caf0a8d --- /dev/null +++ b/.dockerignore @@ -0,0 +1,14 @@ +node_modules +.next +.git +.gitignore +Dockerfile +npm-debug.log +yarn-error.log +pnpm-debug.log +.env +.env.* +blockchain/artifacts +blockchain/cache +blockchain/typechain-types +blockchain/node_modules diff --git a/.nvmrc b/.nvmrc new file mode 100644 index 0000000..209e3ef --- /dev/null +++ b/.nvmrc @@ -0,0 +1 @@ +20 diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..fc92771 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,29 @@ +# syntax=docker/dockerfile:1.7 + +FROM node:20-alpine AS base +WORKDIR /app +ENV NEXT_TELEMETRY_DISABLED=1 + +FROM base AS deps +RUN apk add --no-cache libc6-compat +COPY package.json package-lock.json* ./ +RUN npm ci + +FROM base AS builder +RUN apk add --no-cache libc6-compat +COPY --from=deps /app/node_modules ./node_modules +COPY . . +RUN npx prisma generate +RUN npm run build + +FROM base AS runner +RUN apk add --no-cache libc6-compat +ENV NODE_ENV=production +ENV PORT=3000 + +COPY --from=builder /app/public ./public +COPY --from=builder /app/.next/standalone ./ +COPY --from=builder /app/.next/static ./.next/static + +EXPOSE 3000 +CMD ["node", "server.js"] diff --git a/README.md b/README.md index 23f4465..9038403 100644 --- a/README.md +++ b/README.md @@ -1,110 +1,215 @@ -# πŸ”— LexiChain: Professional BFSI Document Intelligence Platform +# LexiChain -> **Status**: Production-Ready PFE Project -> **Target Audience**: Banking, Financial Services, and Insurance (BFSI) Institutions -> **Key Innovation**: Hybrid integration of Generative AI (Gemini) and Ethereum Blockchain (DocumentRegistry) +

+ LexiChain logo +

---- +

+ BFSI document intelligence platform that combines AI-assisted analysis with blockchain-backed verification. +

-## πŸ›οΈ 1. Project Vision & Mission +

+ Next.js badge + React badge + Hardhat badge + Prisma badge + Clerk badge +

-**LexiChain** is a next-generation platform designed to bridge the gap between complex legal documentation and user-centric transparency. In the traditional BFSI sector, contracts are often "black boxes"β€”static PDFs that are hard to understand and easy to misplace. +LexiChain is a team-ready platform for uploading documents, extracting important information, verifying integrity, and tracking records through a polished enterprise interface. It combines a modern Next.js frontend, a Solidity/Hardhat blockchain module, PostgreSQL with Prisma, and Clerk authentication. -LexiChain transforms these static documents into **dynamic, searchable, and cryptographically secured assets**. Our mission is to automate document analysis while providing an immutable "Digital Notary" service that guarantees trust between financial institutions and their clients. +## Overview ---- +LexiChain is designed for banking, financial services, and insurance workflows where documents must be understandable, traceable, and trustworthy. -## πŸ“‰ 2. Market Problem & Opportunity +It addresses four core needs: -The project addresses several critical "pain points" in the current financial landscape: +- converting dense documents into structured, reviewable insights +- reducing repetitive validation and manual review work +- preserving tamper-evident proof for uploaded files +- giving end users a clearer and more professional contract experience -1. **The Transparency Gap**: Clients often sign contracts without understanding specific exclusion clauses or renewal dates. -2. **Operational Friction**: Insurance agents spend thousands of hours manually checking PDFs for compliance and signature presence. -3. **The Integrity Risk**: In legal disputes, proving that a specific version of a document was the one actually signed can be difficult and expensive. -4. **Information Overload**: Users are overwhelmed by the volume of fine print in modern banking. +## Product Highlights ---- +- AI document analysis powered by Gemini +- OCR-based ingestion for digital and scanned documents +- automated extraction of key contract details +- chat-style retrieval over document content +- blockchain proof-of-existence for uploaded files +- document verification against on-chain hashes +- secure authentication and per-user access control +- dashboard views for contracts, contacts, and claims workflows +- responsive UI with a dark, premium visual style -## πŸš€ 3. Core Feature Deep-Dive +## Visual Preview -### 🧠 A. The AI "Analyst" Module (Intelligence Layer) +The screenshots in [public/screens](public/screens) are intentionally included to make the README feel like a product page and to help new contributors understand the interface quickly. -LexiChain uses **Google Gemini 2.0 Flash** to act as a virtual legal analyst. +| Landing page | Dashboard | +| ------------------------------------------------ | ----------------------------------------------- | +| ![Landing page](public/screens/landing_page.png) | ![Dashboard](public/screens/dashboard_dark.png) | -- **Smart Ingestion**: Uses high-fidelity OCR to read digital PDFs and scanned images. -- **Automated Extraction**: Identifies 15+ key data points (Amount, Interest Rate, Parties, Expiration Dates, Clauses) instantly. -- **RAG (Retrieval-Augmented Generation)**: The most advanced part of the AI. It breaks the contract into "Semantic Chunks" and stores them in a vector index. This allows the user to **Chat with their Contract** in natural language. -- **Intelligent Validation**: The AI automatically flags missing signatures, inconsistent dates, or high-risk clauses before the document is finalized. +| Login | Register | +| ---------------------------------------------- | ---------------------------------------------------- | +| ![Login screen](public/screens/login_dark.png) | ![Register screen](public/screens/register_dark.png) | -### ⛓️ B. The Blockchain "Notary" Module (Security Layer) +| Contracts | +| ---------------------------------------------------- | +| ![Contracts view](public/screens/contracts_dark.png) | -LexiChain uses a private/public hybrid blockchain strategy to ensure **Non-Repudiation**. +## Architecture -- **Proof of Existence (PoE)**: We generate a SHA-256 hash (digital fingerprint) for every file. This hash is sent to a **Solidity Smart Contract** on the Ethereum network. -- **Immutable Timestamping**: The blockchain records exactly _when_ the document was uploaded. This cannot be changed by any administrator, providing a "Golden Record." -- **Metadata Leakage Prevention**: We only store the **Hash** on-chain. No personal data (names, amounts) ever touches the public blockchain, ensuring 100% GDPR compliance. -- **The Explorer**: A built-in "Verification Panel" that allows any auditor to verify a file's integrity by comparing its current hash with the on-chain record. +LexiChain follows a practical feature-oriented structure: ---- +- [app](app) contains the Next.js app router, layouts, and pages +- [components](components) contains shared UI and layout building blocks +- [features](features) contains feature-level business logic +- [hooks](hooks) contains reusable client hooks +- [lib](lib) contains shared utilities and helpers +- [prisma](prisma) contains database schema files +- [blockchain](blockchain) contains the Hardhat project and smart contracts +- [public/screens](public/screens) contains screenshots and visual assets -## πŸ—οΈ 4. Technical Architecture +The solution is split across three main concerns: -### **Architecture Pattern: Feature-Sliced Design (FSD)** +| Layer | Purpose | +| ---------- | ----------------------------------------------------- | +| Frontend | UI, dashboards, forms, and user interactions | +| Backend | Server actions and API routes for business workflows | +| Blockchain | Smart contract registration and document verification | -The project follows **FSD principles**, which is a modern architectural pattern for scaling large applications. +## Tech Stack -- **Layers**: App, Pages, Features, Entities, Shared. -- **Benefits**: Decouples the Blockchain logic from the AI logic, making the system highly maintainable and ready for enterprise scaling. +| Area | Stack | +| -------------- | ------------------------------------ | +| Frontend | Next.js 16, React 19, Tailwind CSS | +| Backend | Next.js server actions, API routes | +| AI | Google Gemini | +| Blockchain | Solidity, Hardhat, Ethers.js | +| Database | PostgreSQL, Prisma | +| Authentication | Clerk | +| UI Components | Radix UI, shadcn/ui-style primitives | -### **The Stack** +## Prerequisites -| Layer | Technology | Rationale | -| :------------- | :----------------------- | :-------------------------------------------------------------------------------------------------- | -| **Frontend** | Next.js 15 (React) | High performance, SEO-friendly, and supports React Server Components. | -| **Backend** | Server Actions (Next.js) | Allows for secure, server-side blockchain signing and API communication without a separate backend. -| **LLM** | Gemini | Unbeatable speed and context window size for long legal documents. | -| **Blockchain** | Solidity / Hardhat | Ethereum-compatible smart contracts for industry-standard security. | -| **Database** | PostgreSQL + Prisma | Robust relational storage for user data and contract metadata. | -| **Identity** | Clerk | Enterprise-grade security for user authentication and session management. | +- Node.js 20 or later +- npm +- PostgreSQL database +- a local or remote blockchain endpoint for development and deployment +- environment variables for Clerk, Gemini, database, and blockchain access ---- +## Environment Variables -## πŸ”’ 5. Security & Privacy Philosophy +The exact values depend on your deployment target, but the project expects environment configuration for the following areas: -LexiChain is built with a **"Security by Design"** approach: +| Area | Typical Variables | +| -------------- | ---------------------------------------------- | +| App | `NODE_ENV`, app URL settings | +| Database | `DATABASE_URL` | +| Authentication | Clerk publishable and secret keys | +| AI | Gemini API key or equivalent model credentials | +| Blockchain | RPC URL, contract address, private key | -- **Hashing vs. Storage**: We never store the actual document on the blockchain. The blockchain only holds the "Proof," while the "Content" remains in encrypted cloud storage. -- **Server-Side Signing**: Users don't need a crypto wallet (MetaMask). Our backend acts as a **Trusted Custodian**, signing transactions with a secure private key hidden in environment variables. -- **Authentication Hooks**: Access to contracts is strictly controlled via Clerk Auth, ensuring users only see their own data. +Keep secrets in environment variables and never commit them to the repository. ---- +## Installation -## 🎨 6. UX/UI & Aesthetics +Install the root application dependencies first: -The application features a **"Premium Glassmorphism"** design system. +```bash +npm install +``` -- **Why?**: In BFSI, the interface must convey **Trust, Modernity, and Clarity**. -- **Design Tokens**: We use vibrant gradients, subtle blurs, and micro-animations to make the complex task of contract management feel light and intuitive. -- **Theme Awareness**: The UI is optimized for both Light and Dark modes, adapting to the professional environment of the user. +Then install the blockchain workspace dependencies: ---- +```bash +cd blockchain +npm install +``` -## 🌟 7. Why this is a 10/10 PFE Project +## Local Development -LexiChain isn't just a simple web app; it is a **Multidisciplinary Innovation**: +The recommended development command starts the app together with the local chain workflow: -1. **AI Innovation**: Moving beyond simple text extraction to a conversational RAG system. -2. **Blockchain Innovation**: Implementing a production-ready Document Registry that solves real-world legal issues. -3. **Architectural Integrity**: Using FSD and Clean Code principles usually found in senior-level software engineering. -4. **Market Readiness**: The solution is directly applicable to banks and insurance companies looking to digitalize their workflow. +```bash +npm run dev +``` ---- +This runs the bootstrap script defined in the root package and is the best option when you want the frontend and blockchain pieces aligned locally. -## πŸ“š 8. Glossary for NotebookLM +If you only need the Next.js app without the chain bootstrap, run: -- **BFSI**: Banking, Financial Services, and Insurance. -- **RAG (Retrieval-Augmented Generation)**: A technique that allows AI to answer questions based _only_ on the provided documents, preventing "hallucinations." -- **Smart Contract**: A programmable contract that executes automatically when conditions are met. -- **SHA-256**: A one-way cryptographic function. If you change 1 bit of a file, the entire hash changes. -- **Hardhat**: A professional development environment for Ethereum software. -- **Sepolia**: The public test network used to simulate the real Ethereum blockchain. +```bash +npm run dev:next +``` + +## Scripts + +### Root workspace + +| Command | Description | +| ------------------------ | ------------------------------------------- | +| `npm run dev` | Starts the combined development workflow | +| `npm run dev:with-chain` | Alias for the combined development workflow | +| `npm run dev:next` | Runs only the Next.js dev server | +| `npm run build` | Builds the production application | +| `npm run start` | Starts the production server | +| `npm run lint` | Runs ESLint | + +### Blockchain workspace + +| Command | Description | +| ------------------------ | ------------------------------------ | +| `npm run compile` | Compiles the smart contracts | +| `npm run test` | Runs the Hardhat test suite | +| `npm run node` | Starts a local Hardhat node | +| `npm run deploy:local` | Deploys to the local Hardhat network | +| `npm run deploy:sepolia` | Deploys to Sepolia | + +## Deployment + +This is the clean production path for option 3 in the README. + +```bash +npm run build +npm run start +``` + +Before deploying, verify: + +- environment variables are set correctly +- the database is reachable +- the blockchain contract address and RPC settings are valid +- the code passes linting and any required tests + +## Team Notes + +These are the implementation details future contributors should know before extending the app: + +- Contract records store the internal application user id, not the Clerk user id; resolve the Clerk user first before querying contract data. +- The upload flow triggers analysis automatically after saving a contract, so the UI should show analysis-in-progress feedback immediately. +- Dashboard and contacts routes live under `/dashboard` and `/contacts`. +- Trend charts should be aggregated by day with zero-filled windows so 30-day views stay accurate. +- Q&A over contracts uses Gemini embeddings and an in-memory contract vector cache. +- Claim status updates are intentionally restricted; the UI should use the allowed next statuses for each claim instead of a global list. + +## Contribution Guidelines + +If you are continuing this project as a team, keep the following practices in mind: + +- make focused changes and avoid mixing unrelated refactors with feature work +- keep environment-dependent values out of source control +- prefer the existing feature structure when adding new UI or business logic +- update screenshots when user-facing screens change significantly +- document workflow changes in the README or the relevant docs file + +## Troubleshooting + +- If the app does not start, verify your Node.js version and reinstall dependencies. +- If blockchain features fail, confirm the local node is running and the contract address points to a deployed contract. +- If authentication fails, recheck the Clerk environment variables and callback configuration. +- If database access fails, validate the Prisma connection string and database availability. + +## Summary + +LexiChain is a BFSI document intelligence platform built for contract review, verification, and operational clarity. The codebase is structured to be maintainable by a team, with a clear split between app, blockchain, data, and shared UI concerns. diff --git a/app/(dashboard)/blockchain/page.tsx b/app/(dashboard)/blockchain/page.tsx index fe64db3..adc450e 100644 --- a/app/(dashboard)/blockchain/page.tsx +++ b/app/(dashboard)/blockchain/page.tsx @@ -1,7 +1,7 @@ "use client"; import React, { useEffect, useState, useCallback } from "react"; -import { motion } from "motion/react"; +import { motion, AnimatePresence } from "motion/react"; import { Link2, Shield, @@ -18,6 +18,13 @@ import { Check, AlertCircle, Upload, + Zap, + Fingerprint, + Radio, + ChevronRight, + Terminal, + Lock, + Globe, } from "lucide-react"; import { Button } from "@/components/ui/button"; import { @@ -25,6 +32,7 @@ import { getBlockchainStats, verifyDocumentHashOnBlockchain, registerContractOnBlockchain, + generateContractCertificate, } from "@/features/blockchain/api/blockchain.action"; import { getContracts } from "@/features/contracts/api/contract.action"; import type { @@ -34,11 +42,13 @@ import type { import { toast } from "sonner"; // ═══════════════════════════════════════════════════════════════ -// Blockchain Explorer Page +// Blockchain Explorer β€” 2026 Edition // ═══════════════════════════════════════════════════════════════ export default function BlockchainExplorerPage() { - const [transactions, setTransactions] = useState([]); + const [transactions, setTransactions] = useState( + [], + ); const [stats, setStats] = useState(null); const [loading, setLoading] = useState(true); const [verifyHash, setVerifyHash] = useState(""); @@ -53,6 +63,12 @@ export default function BlockchainExplorerPage() { Array<{ id: string; title: string | null; fileName: string }> >([]); const [registeringId, setRegisteringId] = useState(null); + const [downloadingCertificateId, setDownloadingCertificateId] = useState< + string | null + >(null); + const [activeTab, setActiveTab] = useState<"all" | "verified" | "pending">( + "all", + ); const loadData = useCallback(async () => { setLoading(true); @@ -70,15 +86,14 @@ export default function BlockchainExplorerPage() { setStats(statsResult.stats); } - // Find contracts not yet on blockchain if (contractsResult.success && contractsResult.contracts) { const registered = new Set( - txResult.transactions?.map((tx) => tx.contractId) ?? [] + txResult.transactions?.map((tx) => tx.contractId) ?? [], ); const unregistered = contractsResult.contracts .filter( (c: { id: string; txHash?: string | null; status: string }) => - !c.txHash && !registered.has(c.id) && c.status === "COMPLETED" + !c.txHash && !registered.has(c.id) && c.status === "COMPLETED", ) .map((c: { id: string; title: string | null; fileName: string }) => ({ id: c.id, @@ -133,6 +148,42 @@ export default function BlockchainExplorerPage() { } }; + const handleDownloadCertificate = async ( + contractId: string, + contractTitle: string, + ) => { + setDownloadingCertificateId(contractId); + try { + const result = await generateContractCertificate(contractId); + if (result.success && result.certificatePdfBase64) { + const base64 = result.certificatePdfBase64; + const binary = atob(base64); + const bytes = new Uint8Array(binary.length); + for (let i = 0; i < binary.length; i += 1) { + bytes[i] = binary.charCodeAt(i); + } + const blob = new Blob([bytes], { type: "application/pdf" }); + const url = URL.createObjectURL(blob); + const link = document.createElement("a"); + link.href = url; + link.download = + result.certificateFileName || + `certificate-${contractTitle || contractId}.pdf`; + document.body.appendChild(link); + link.click(); + document.body.removeChild(link); + URL.revokeObjectURL(url); + toast.success("Certificate downloaded successfully!"); + } else { + toast.error(result.error || "Failed to generate certificate"); + } + } catch { + toast.error("Failed to download certificate"); + } finally { + setDownloadingCertificateId(null); + } + }; + const copyToClipboard = (text: string) => { navigator.clipboard.writeText(text); setCopiedTx(text); @@ -148,385 +199,630 @@ export default function BlockchainExplorerPage() { return `${hash.slice(0, chars + 2)}...${hash.slice(-chars)}`; }; + const filteredTransactions = transactions.filter((tx) => { + if (activeTab === "verified") + return tx.status === "CONFIRMED" || tx.status === "SUCCESS"; + if (activeTab === "pending") + return tx.status === "PENDING" || tx.status === "PROCESSING"; + return true; + }); + return ( -
- {/* Page Header */} - -
-

-
- -
- Blockchain Explorer -

-

- View on-chain proofs and verify document integrity -

-
- - +
+ {/* Ambient Background */} +
+
+
+
+
+
- {/* Stats Cards */} - - } - label="Verified Documents" - value={stats?.totalVerified?.toString() ?? "0"} - color="emerald" - /> - } - label="Latest Block" - value={stats?.latestBlockNumber ? `#${stats.latestBlockNumber.toLocaleString()}` : "β€”"} - color="blue" - /> - } - label="Network" - value={stats?.networkName ? `${stats.networkName} ${stats.chainId ? `(Chain ${stats.chainId})` : ""}` : "Not Configured"} - color={stats?.networkStatus === "connected" ? "emerald" : "red"} - badge={stats?.networkStatus === "connected" ? "● Live" : "● Offline"} - /> - } - label="Wallet" - value={stats?.walletAddress ? truncateHash(stats.walletAddress, 6) : "β€”"} - color="violet" - /> - - - {/* Unregistered contracts */} - {unregisteredContracts.length > 0 && ( +
+ {/* Page Header */} -
- -

- {unregisteredContracts.length} contract{unregisteredContracts.length > 1 ? "s" : ""} not yet on blockchain -

-
-
- {unregisteredContracts.map((contract) => ( -
-
- - - {contract.title || contract.fileName} - -
- -
- ))} -
- - )} - -
- {/* Transactions List */} - -
-

- - Transaction History -

-

- All documents registered on the blockchain -

-
- - {loading ? ( -
- - Loading transactions... -
- ) : transactions.length === 0 ? ( -
- -

No transactions yet

-

- Upload and analyze a contract to register it on-chain -

-
- ) : ( -
- {transactions.map((tx, idx) => ( - -
-
-
- - - {tx.contractTitle || tx.contractFileName} - - - {tx.status} - -
- -
-
- - Fingerprint: {truncateHash(tx.documentHash, 12)} - -
-
- - Tx: {truncateHash(tx.txHash, 12)} - -
-
- - Block #{tx.blockNumber.toLocaleString()} -
-
- - {formatTimestamp(tx.blockTimestamp)} -
-
-
- -
- - {tx.network === "sepolia" ? "Sepolia" : "Hardhat"} - - {tx.explorerUrl && ( - - Etherscan - - - )} -
-
- - ))} -
- )} - - - {/* Verification Panel */} - -
-

- - Verify Document -

-

- Check if a document hash exists on-chain -

-
- -
-
- -