Mục Lục
- 1 1. Tổng quan Kiến trúc Hệ thống
- 2 2. Chi tiết Kỹ thuật cho từng Module
- 3 3. Hạ tầng Kỹ thuật và DevOps
- 4 4. Mobile App Technical Specifications
- 5 5. Phân tích Chi phí và Timeline
- 6 6. Risk Assessment và Mitigation
- 7 7. Lộ trình Phát triển và Deployment
1. Tổng quan Kiến trúc Hệ thống
1.1 Mục tiêu và Tầm nhìn
Ứng dụng crypto hiện đại cần hoạt động như một hub tích hợp toàn diện, kết nối người dùng với toàn bộ hệ sinh thái blockchain. Không chỉ đơn thuần là công cụ lưu trữ tài sản số, mà còn phải đảm bảo tính bảo mật cao, hiệu suất xử lý nhanh chóng và khả năng mở rộng linh hoạt để đáp ứng nhu cầu ngày càng tăng của thị trường DeFi, NFT và Web3.
1.2 Kiến trúc Microservices
Backend Architecture:
- API Gateway Layer: Kong/Nginx với rate limiting, authentication, load balancing
- Authentication Service: JWT tokens, OAuth2, Multi-factor Authentication
- Wallet Service: HD Wallets, Key Management, Transaction Broadcasting
- Trading Engine: Matching Engine với throughput >100k TPS
- Blockchain Integration Layer: Web3 providers, Node connections (Infura, Alchemy)
- Data Layer: PostgreSQL (transactional), Redis (caching), MongoDB (analytics)
2. Chi tiết Kỹ thuật cho từng Module
A. Ứng dụng Ví Tiền Ảo (Crypto Wallet App)
2.1 Hỗ trợ Multi-Chain và Token Standards
Technical Stack:
- Blockchain Support: Bitcoin (UTXO), Ethereum (Account-based), BSC, Polygon, Avalanche
- Token Standards: ERC-20, ERC-721, ERC-1155, BEP-20, SPL tokens
- Implementation: Web3.js/Ethers.js cho EVM chains, Bitcoin Core RPC cho Bitcoin
</span></p>
<p><span style="font-weight: 400;">typescript</span></p>
<p><span style="font-weight: 400;">interface</span> <span style="font-weight: 400;">WalletService</span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">createHDWallet</span><span style="font-weight: 400;">(mnemonic</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">string</span><span style="font-weight: 400;">, chainType</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> ChainType)</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> Wallet;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">deriveAddress</span><span style="font-weight: 400;">(wallet</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> Wallet, index</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">number</span><span style="font-weight: 400;">)</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> Address;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">signTransaction</span><span style="font-weight: 400;">(privateKey</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">string</span><span style="font-weight: 400;">, transaction</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> Transaction)</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> SignedTx;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">broadcastTransaction</span><span style="font-weight: 400;">(signedTx</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> SignedTx)</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> TransactionHash;</span></p>
<p><span style="font-weight: 400;">}</span></p>
<p><span style="font-weight: 400;">
2.2 Bảo mật Nâng cao
Security Implementation:
- Key Management: Hardware Security Module (HSM) integration
- Encryption: AES-256-GCM cho private keys, Argon2 cho password hashing
- Secure Storage: Android Keystore, iOS Secure Enclave
- Multi-signature: 2-of-3, 3-of-5 configurations với Gnosis Safe integration
Biometric Authentication:
</span></p>
<p><span style="font-weight: 400;">swift</span></p>
<p><i><span style="font-weight: 400;">// iOS Implementation</span></i></p>
<p><span style="font-weight: 400;">func</span> <span style="font-weight: 400;">authenticateWithBiometrics</span><span style="font-weight: 400;">() {</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">let</span><span style="font-weight: 400;"> context </span><span style="font-weight: 400;">=</span> <span style="font-weight: 400;">LAContext</span><span style="font-weight: 400;">()</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">let</span><span style="font-weight: 400;"> policy </span><span style="font-weight: 400;">=</span> <span style="font-weight: 400;">LAPolicy</span><span style="font-weight: 400;">.deviceOwnerAuthenticationWithBiometrics</span></p>
<p><span style="font-weight: 400;"> context.</span><span style="font-weight: 400;">evaluatePolicy</span><span style="font-weight: 400;">(policy, localizedReason: </span><span style="font-weight: 400;">“Access your wallet”</span><span style="font-weight: 400;">) { success, error </span><span style="font-weight: 400;">in</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">if</span><span style="font-weight: 400;"> success {</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">self</span><span style="font-weight: 400;">.</span><span style="font-weight: 400;">unlockWallet</span><span style="font-weight: 400;">()</span></p>
<p><span style="font-weight: 400;"> }</span></p>
<p><span style="font-weight: 400;"> }</span></p>
<p><span style="font-weight: 400;">}</span></p>
<p><span style="font-weight: 400;">
2.3 Transaction Management
Features:
- Gas Optimization: Dynamic gas price calculation, EIP-1559 support
- Batch Transactions: Multiple operations in single transaction
- Transaction Queuing: Nonce management, replacement transactions
- Multi-send: Bulk transfers với gas optimization
B. Ứng dụng Giao Dịch Crypto (Trading Engine)
2.4 High-Performance Trading Engine
Architecture Components:
- Order Book: In-memory data structures với persistent storage
- Matching Engine: C++/Rust implementation cho tốc độ cao
- Risk Management: Position limits, margin calculations, liquidation engine
- Market Data: Real-time WebSocket feeds, OHLCV data aggregation
Performance Specifications:
</span></p>
<p><span style="font-weight: 400;">rust</span></p>
<p><i><span style="font-weight: 400;">// Matching Engine Core</span></i></p>
<p><span style="font-weight: 400;">pub</span> <span style="font-weight: 400;">struct</span> <span style="font-weight: 400;">OrderBook</span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> bids: </span><span style="font-weight: 400;">BTreeMap</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">Price</span><span style="font-weight: 400;">, </span><span style="font-weight: 400;">VecDeque</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">Order</span><span style="font-weight: 400;">>></span><span style="font-weight: 400;">,</span></p>
<p><span style="font-weight: 400;"> asks: </span><span style="font-weight: 400;">BTreeMap</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">Price</span><span style="font-weight: 400;">, </span><span style="font-weight: 400;">VecDeque</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">Order</span><span style="font-weight: 400;">>></span><span style="font-weight: 400;">,</span></p>
<p><span style="font-weight: 400;"> orders: </span><span style="font-weight: 400;">HashMap</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">OrderId</span><span style="font-weight: 400;">, </span><span style="font-weight: 400;">Order</span><span style="font-weight: 400;">></span><span style="font-weight: 400;">,</span></p>
<p><span style="font-weight: 400;">}</span></p>
<p> </p>
<p><span style="font-weight: 400;">impl</span> <span style="font-weight: 400;">OrderBook</span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">pub</span> <span style="font-weight: 400;">fn</span> <span style="font-weight: 400;">match_order</span><span style="font-weight: 400;">(</span><span style="font-weight: 400;">&</span><span style="font-weight: 400;">mut</span> <span style="font-weight: 400;">self</span><span style="font-weight: 400;">, order: </span><span style="font-weight: 400;">Order</span><span style="font-weight: 400;">) -> </span><span style="font-weight: 400;">Vec</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">Trade</span><span style="font-weight: 400;">></span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> </span><i><span style="font-weight: 400;">// Sub-millisecond matching logic</span></i></p>
<p><span style="font-weight: 400;"> </span><i><span style="font-weight: 400;">// Target: <0.1ms latency for order processing</span></i></p>
<p><span style="font-weight: 400;"> }</span></p>
<p><span style="font-weight: 400;">}</span></p>
<p><span style="font-weight: 400;">
2.5 Advanced Trading Features
Technical Analysis Tools:
- Chart Engine: TradingView charting library integration
- Indicators: 50+ technical indicators (RSI, MACD, Bollinger Bands)
- Custom Strategies: Pine Script support cho user-defined strategies
- Backtesting: Historical data analysis với Monte Carlo simulations
API Integration:
Smart Contract Integration: Marketplace Features: Cross-chain Architecture: DeFi Integration: Advanced Token Features: Production Environment: Security Measures: Compliance Framework: Observability Stack: Framework Selection: Mobile-specific Optimizations: Development Team Structure: High Priority Risks: Mitigation Strategies: Việc phát triển một ứng dụng crypto toàn diện đòi hỏi sự kết hợp giữa công nghệ blockchain tiên tiến, kiến trúc hệ thống có thể mở rộng và các biện pháp bảo mật nghiêm ngặt. Với đặc tả kỹ thuật chi tiết này, đội ngũ phát triển có thể xây dựng một platform mạnh mẽ, đáp ứng nhu cầu đa dạng của người dùng từ ví tiền ảo cơ bản đến các tính năng DeFi phức tạp. Khuyến nghị: Bắt đầu với MVP (Minimum Viable Product) tập trung vào wallet core features, sau đó mở rộng dần theo nhu cầu thị trường và phản hồi người dùng. </span></p>
<p><span style="font-weight: 400;">python</span></p>
<p><i><span style="font-weight: 400;"># REST API cho algorithmic trading</span></i></p>
<p><span style="font-weight: 400;">@app.route(</span><span style="font-weight: 400;">‘/api/v1/orders’</span><span style="font-weight: 400;">, methods</span><span style="font-weight: 400;">=</span><span style="font-weight: 400;">[</span><span style="font-weight: 400;">‘POST’</span><span style="font-weight: 400;">])</span></p>
<p><span style="font-weight: 400;">@require_api_key</span></p>
<p><span style="font-weight: 400;">@rate_limit(</span><span style="font-weight: 400;">‘1000/minute’</span><span style="font-weight: 400;">)</span></p>
<p><span style="font-weight: 400;">def</span> <span style="font-weight: 400;">place_order</span><span style="font-weight: 400;">():</span></p>
<p><span style="font-weight: 400;"> order </span><span style="font-weight: 400;">=</span><span style="font-weight: 400;"> validate_order_request(request.json)</span></p>
<p><span style="font-weight: 400;"> result </span><span style="font-weight: 400;">=</span><span style="font-weight: 400;"> trading_engine.submit_order(order)</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">return</span><span style="font-weight: 400;"> jsonify(result)</span></p>
<p> </p>
<p><i><span style="font-weight: 400;"># WebSocket cho real-time data</span></i></p>
<p><span style="font-weight: 400;">@socketio.on(</span><span style="font-weight: 400;">‘subscribe_orderbook’</span><span style="font-weight: 400;">)</span></p>
<p><span style="font-weight: 400;">def</span> <span style="font-weight: 400;">handle_orderbook_subscription</span><span style="font-weight: 400;">(data):</span></p>
<p><span style="font-weight: 400;"> symbol </span><span style="font-weight: 400;">=</span><span style="font-weight: 400;"> data[</span><span style="font-weight: 400;">‘symbol’</span><span style="font-weight: 400;">]</span></p>
<p><span style="font-weight: 400;"> emit(</span><span style="font-weight: 400;">‘orderbook_update’</span><span style="font-weight: 400;">, get_orderbook_snapshot(symbol))</span></p>
C. Ứng dụng NFT (NFT Marketplace)
2.6 NFT Infrastructure
</span></p>
<p><span style="font-weight: 400;">solidity</span></p>
<p><i><span style="font-weight: 400;">// Smart Contract cho NFT Marketplace</span></i></p>
<p><span style="font-weight: 400;">contract</span> <span style="font-weight: 400;">NFTMarketplace</span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">struct</span> <span style="font-weight: 400;">Listing</span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">address</span><span style="font-weight: 400;"> seller;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">address</span><span style="font-weight: 400;"> nftContract;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">uint256</span><span style="font-weight: 400;"> tokenId;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">uint256</span><span style="font-weight: 400;"> price;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">bool</span><span style="font-weight: 400;"> active;</span></p>
<p><span style="font-weight: 400;"> }</span></p>
<p><span style="font-weight: 400;"> </span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">mapping</span><span style="font-weight: 400;">(</span><span style="font-weight: 400;">bytes32</span> <span style="font-weight: 400;">=></span><span style="font-weight: 400;"> Listing) </span><span style="font-weight: 400;">public</span><span style="font-weight: 400;"> listings;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">mapping</span><span style="font-weight: 400;">(</span><span style="font-weight: 400;">address</span> <span style="font-weight: 400;">=></span> <span style="font-weight: 400;">uint256</span><span style="font-weight: 400;">) </span><span style="font-weight: 400;">public</span><span style="font-weight: 400;"> royalties;</span></p>
<p><span style="font-weight: 400;"> </span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">function</span> <span style="font-weight: 400;">createListing</span><span style="font-weight: 400;">(</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">address</span><span style="font-weight: 400;"> nftContract,</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">uint256</span><span style="font-weight: 400;"> tokenId,</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">uint256</span><span style="font-weight: 400;"> price</span></p>
<p><span style="font-weight: 400;"> ) </span><span style="font-weight: 400;">external</span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> </span><i><span style="font-weight: 400;">// Listing logic với royalty calculations</span></i></p>
<p><span style="font-weight: 400;"> }</span></p>
<p><span style="font-weight: 400;">}</span></p>
2.7 Multi-chain NFT Support
D. Ứng dụng Token (Token Economy)
2.8 Token Management Platform
</span></b></span></p>
<p><span style="font-weight: 400;">typescript</span></p>
<p><span style="font-weight: 400;">interface</span> <span style="font-weight: 400;">StakingService</span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">stake</span><span style="font-weight: 400;">(amount</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> BigNumber, duration</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">number</span><span style="font-weight: 400;">)</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">Promise</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">StakeResult</span><span style="font-weight: 400;">></span><span style="font-weight: 400;">;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">unstake</span><span style="font-weight: 400;">(stakeId</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">string</span><span style="font-weight: 400;">)</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">Promise</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">UnstakeResult</span><span style="font-weight: 400;">></span><span style="font-weight: 400;">;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">calculateRewards</span><span style="font-weight: 400;">(address</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">string</span><span style="font-weight: 400;">)</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">Promise</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">BigNumber</span><span style="font-weight: 400;">></span><span style="font-weight: 400;">;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">claimRewards</span><span style="font-weight: 400;">()</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">Promise</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">TransactionHash</span><span style="font-weight: 400;">></span><span style="font-weight: 400;">;</span></p>
<p><span style="font-weight: 400;">}</span></p>
<p> </p>
<p><span style="font-weight: 400;">interface</span> <span style="font-weight: 400;">GovernanceService</span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">createProposal</span><span style="font-weight: 400;">(proposal</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> Proposal)</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">Promise</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">ProposalId</span><span style="font-weight: 400;">></span><span style="font-weight: 400;">;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">vote</span><span style="font-weight: 400;">(proposalId</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">string</span><span style="font-weight: 400;">, vote</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> VoteType)</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">Promise</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">VoteResult</span><span style="font-weight: 400;">></span><span style="font-weight: 400;">;</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">executeProposal</span><span style="font-weight: 400;">(proposalId</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">string</span><span style="font-weight: 400;">)</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">Promise</span><span style="font-weight: 400;"><</span><span style="font-weight: 400;">ExecutionResult</span><span style="font-weight: 400;">></span><span style="font-weight: 400;">;</span></p>
<p><span style="font-weight: 400;">}</span></p>
3. Hạ tầng Kỹ thuật và DevOps
3.1 Cloud Infrastructure
3.2 Security và Compliance
</span></b></span></p>
<p><span style="font-weight: 400;">yaml</span></p>
<p><i><span style="font-weight: 400;"># Security Stack</span></i></p>
<p><span style="font-weight: 400;">security</span><span style="font-weight: 400;">:</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">waf</span><span style="font-weight: 400;">: CloudFlare WAF</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">ddos_protection</span><span style="font-weight: 400;">: CloudFlare Pro</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">ssl</span><span style="font-weight: 400;">: Let’s Encrypt với HSTS</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">api_security</span><span style="font-weight: 400;">:</span></p>
<p><span style="font-weight: 400;"> – </span><span style="font-weight: 400;">rate_limiting</span><span style="font-weight: 400;">: Redis-based sliding window</span></p>
<p><span style="font-weight: 400;"> – </span><span style="font-weight: 400;">authentication</span><span style="font-weight: 400;">: JWT với RS256 signing</span></p>
<p><span style="font-weight: 400;"> – </span><span style="font-weight: 400;">authorization</span><span style="font-weight: 400;">: RBAC với fine-grained permissions</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">data_encryption</span><span style="font-weight: 400;">:</span></p>
<p><span style="font-weight: 400;"> – </span><span style="font-weight: 400;">at_rest</span><span style="font-weight: 400;">: AES-256 database encryption</span></p>
<p><span style="font-weight: 400;"> – </span><span style="font-weight: 400;">in_transit</span><span style="font-weight: 400;">: TLS 1.3</span></p>
<p><span style="font-weight: 400;"> – </span><span style="font-weight: 400;">keys</span><span style="font-weight: 400;">: AWS KMS/GCP KMS integration</span></p>
<p><b><span data-teams="true">
3.3 Monitoring và Analytics
</span></b></span></p>
<p><span style="font-weight: 400;">javascript</span></p>
<p><i><span style="font-weight: 400;">// Custom metrics cho business intelligence</span></i></p>
<p><span style="font-weight: 400;">const</span><span style="font-weight: 400;"> metrics </span><span style="font-weight: 400;">=</span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">activeWallets</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> prometheus.register.</span><span style="font-weight: 400;">gauge</span><span style="font-weight: 400;">(</span><span style="font-weight: 400;">‘active_wallets_total’</span><span style="font-weight: 400;">),</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">transactionVolume</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> prometheus.register.</span><span style="font-weight: 400;">histogram</span><span style="font-weight: 400;">(</span><span style="font-weight: 400;">‘transaction_volume’</span><span style="font-weight: 400;">),</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">tradingPairs</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> prometheus.register.</span><span style="font-weight: 400;">counter</span><span style="font-weight: 400;">(</span><span style="font-weight: 400;">‘trading_pairs_created’</span><span style="font-weight: 400;">),</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">nftSales</span><span style="font-weight: 400;">:</span><span style="font-weight: 400;"> prometheus.register.</span><span style="font-weight: 400;">summary</span><span style="font-weight: 400;">(</span><span style="font-weight: 400;">‘nft_sales_value’</span><span style="font-weight: 400;">)</span></p>
<p><span style="font-weight: 400;">};</span></p>
<p><b><span data-teams="true">
4. Mobile App Technical Specifications
4.1 Cross-platform Development
4.2 Performance Optimization
</span></b></span></p>
<p><span style="font-weight: 400;">typescript</span></p>
<p><i><span style="font-weight: 400;">// Lazy loading cho large datasets</span></i></p>
<p><span style="font-weight: 400;">const</span><span style="font-weight: 400;"> LazyNFTList </span><span style="font-weight: 400;">=</span> <span style="font-weight: 400;">lazy</span><span style="font-weight: 400;">(() </span><span style="font-weight: 400;">=></span> <span style="font-weight: 400;">import</span><span style="font-weight: 400;">(</span><span style="font-weight: 400;">‘./components/NFTList’</span><span style="font-weight: 400;">));</span></p>
<p> </p>
<p><i><span style="font-weight: 400;">// Image optimization</span></i></p>
<p><span style="font-weight: 400;">const</span> <span style="font-weight: 400;">optimizedImageLoader</span> <span style="font-weight: 400;">=</span><span style="font-weight: 400;"> (src</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">string</span><span style="font-weight: 400;">, width</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">number</span><span style="font-weight: 400;">) </span><span style="font-weight: 400;">=></span><span style="font-weight: 400;"> {</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">return</span> <span style="font-weight: 400;">`https://cdn.example.com/</span><span style="font-weight: 400;">${src}</span><span style="font-weight: 400;">?w=</span><span style="font-weight: 400;">${width}</span><span style="font-weight: 400;">&format=webp`</span><span style="font-weight: 400;">;</span></p>
<p><span style="font-weight: 400;">};</span></p>
<p> </p>
<p><i><span style="font-weight: 400;">// Background sync cho offline functionality</span></i></p>
<p><span style="font-weight: 400;">const</span><span style="font-weight: 400;"> backgroundSync </span><span style="font-weight: 400;">=</span> <span style="font-weight: 400;">new</span> <span style="font-weight: 400;">BackgroundSync</span><span style="font-weight: 400;">(</span><span style="font-weight: 400;">‘crypto-data’</span><span style="font-weight: 400;">, {</span></p>
<p><span style="font-weight: 400;"> maxRetentionTime</span><span style="font-weight: 400;">:</span> <span style="font-weight: 400;">24</span> <span style="font-weight: 400;">*</span> <span style="font-weight: 400;">60</span> <span style="font-weight: 400;">*</span> <span style="font-weight: 400;">60</span> <span style="font-weight: 400;">*</span> <span style="font-weight: 400;">1000</span><span style="font-weight: 400;">, </span><i><span style="font-weight: 400;">// 24 hours</span></i></p>
<p><span style="font-weight: 400;">});</span></p>
<p><b><span data-teams="true">
5. Phân tích Chi phí và Timeline
5.1 Resource Allocation
5.2 Infrastructure Costs (Monthly)
</span></b></span></p>
<p><span style="font-weight: 400;">yaml</span></p>
<p><span style="font-weight: 400;">infrastructure_costs</span><span style="font-weight: 400;">:</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">aws_services</span><span style="font-weight: 400;">:</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">compute</span><span style="font-weight: 400;">: $2000-</span><span style="font-weight: 400;">4000</span><span style="font-weight: 400;"> </span><i><span style="font-weight: 400;"># EKS, EC2 instances</span></i></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">database</span><span style="font-weight: 400;">: $800-</span><span style="font-weight: 400;">1500</span><span style="font-weight: 400;"> </span><i><span style="font-weight: 400;"># RDS, ElastiCache</span></i></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">storage</span><span style="font-weight: 400;">: $300-</span><span style="font-weight: 400;">600</span><span style="font-weight: 400;"> </span><i><span style="font-weight: 400;"># S3, EBS</span></i></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">networking</span><span style="font-weight: 400;">: $200-</span><span style="font-weight: 400;">400</span> <i><span style="font-weight: 400;"># CloudFront, Load Balancers</span></i></p>
<p><span style="font-weight: 400;"> </span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">third_party_services</span><span style="font-weight: 400;">:</span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">blockchain_nodes</span><span style="font-weight: 400;">: $500-</span><span style="font-weight: 400;">1000</span><span style="font-weight: 400;"> </span><i><span style="font-weight: 400;"># Infura, Alchemy</span></i></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">monitoring</span><span style="font-weight: 400;">: $200-</span><span style="font-weight: 400;">500</span><span style="font-weight: 400;"> </span><i><span style="font-weight: 400;"># New Relic, Sentry</span></i></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">security</span><span style="font-weight: 400;">: $300-</span><span style="font-weight: 400;">600</span><span style="font-weight: 400;"> </span><i><span style="font-weight: 400;"># WAF, DDoS protection</span></i></p>
<p><span style="font-weight: 400;"> </span></p>
<p><span style="font-weight: 400;"> </span><span style="font-weight: 400;">total_monthly</span><span style="font-weight: 400;">: $4300-</span><span style="font-weight: 400;">8600</span></p>
<p><b><span data-teams="true">
6. Risk Assessment và Mitigation
6.1 Technical Risks
6.2 Operational Risks
7. Lộ trình Phát triển và Deployment
7.1 Phase 1: Core Infrastructure (Months 1-3)
7.2 Phase 2: Advanced Features (Months 4-6)
7.3 Phase 3: Polish và Launch (Months 7-8)
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