3-1. PandaV2 SDK
Overview
The PandaV2 SDK is the technical core of the Mei system—a powerful development framework designed specifically for Web3 interactions. Think of it as Mei's "brain," responsible for translating users' natural language requests into precise blockchain operations. Through modular architecture and intelligent routing systems, the PandaV2 SDK makes complex blockchain development simple and elegant.
Core Architecture
Layered Design Philosophy
The PandaV2 SDK adopts a layered architecture where each layer has clear responsibilities, ensuring system maintainability and scalability:
Application Layer
↓
Intent Parsing Layer
↓
Routing Optimization Layer
↓
MCP Execution Layer
↓
Blockchain Abstraction LayerModular Component System
Each function is encapsulated as an independent module, like LEGO blocks that can be flexibly combined:
Core Modules
Intent Parser: Natural language intent recognition and parsing
Route Optimizer: Intelligent path selection and optimization
Transaction Builder: Transaction construction and signature management
State Manager: State management and data synchronization
Error Handler: Error handling and recovery mechanisms
Key Functional Features
Intelligent Intent Recognition
One of the PandaV2 SDK's core capabilities is understanding users' true intentions, even when expressed in countless different ways.
Intent Classification System
interface UserIntent {
category: 'query' | 'transaction' | 'analysis' | 'management';
action: string;
parameters: {
asset?: string;
amount?: number;
timeframe?: string;
risk_level?: 'low' | 'medium' | 'high';
};
confidence: number;
}Multi-Language Support
Chinese: "帮我买100美元的SOL" (Help me buy $100 worth of SOL)
English: "Buy $100 worth of SOL for me"
Intent Mapping: Automatically maps different language expressions to unified intent structures
Dynamic Route Optimization
For any user request, there may be multiple execution paths. The SDK intelligently selects the optimal solution.
Route Decision Factors
Cost Optimization: Comprehensively considers gas fees, slippage, and time costs
Liquidity Assessment: Real-time evaluation of liquidity conditions across different DEXs
Risk Control: Adjusts execution strategies based on user risk preferences
Success Rate Prediction: Predicts transaction success probability based on historical data
Route Example
User request: "Buy $1000 worth of SOL"
Route Analysis:
├── Jupiter Aggregator: Fee 0.25%, Slippage 0.1%, Est. Time 8s
├── Raydium Direct: Fee 0.30%, Slippage 0.05%, Est. Time 5s
└── Orca: Fee 0.28%, Slippage 0.08%, Est. Time 6s
Recommended: Jupiter Aggregator (Optimal overall score)Developer Interface
Core API Design
The PandaV2 SDK provides clean and powerful API interfaces, enabling developers to quickly integrate Mei's capabilities.
Basic Initialization
import { PandaV2SDK } from '@mei/panda-v2';
const sdk = new PandaV2SDK({
network: 'solana-mainnet',
apiKey: process.env.PANDA_API_KEY,
userWallet: userWalletAddress,
mcpLayers: ['basic', 'tokenSniffing', 'walletIndexing']
});Intent Processing
// Process user input
const result = await sdk.processIntent({
input: "I want to check my portfolio performance",
context: {
userId: "user123",
sessionId: "session456",
timestamp: Date.now()
}
});
// Return structured result
interface ProcessResult {
intent: UserIntent;
executionPlan: ExecutionStep[];
estimatedCost: CostBreakdown;
riskAssessment: RiskReport;
}Plugin System
Developers can extend SDK functionality by adding custom MCP layers or interaction logic.
Plugin Development Interface
interface MCPPlugin {
name: string;
version: string;
dependencies: string[];
initialize(config: PluginConfig): Promise<void>;
execute(request: MCPRequest): Promise<MCPResponse>;
cleanup(): Promise<void>;
}Security Architecture
Multi-Layer Security Protection
The SDK implements multiple security mechanisms to ensure user asset and data safety.
Permission Separation Principle
Read-Only Permissions: Query operations don't require private key access
Transaction Permissions: Transaction operations need explicit user authorization
Batch Permissions: Batch operations require additional verification levels
Transaction Security Mechanisms
interface TransactionSecurity {
// Pre-transaction validation
preValidation: {
balanceCheck: boolean;
slippageLimit: number;
gasEstimation: number;
};
// Execution monitoring
monitoring: {
timeoutProtection: number;
failureRetry: number;
statusTracking: boolean;
};
// Post-confirmation
postConfirmation: {
resultVerification: boolean;
eventLogging: boolean;
userNotification: boolean;
};
}Performance Optimization
Caching Strategy
Intelligent caching mechanisms significantly improve response speed and reduce unnecessary network requests.
Multi-Layer Cache Architecture
Memory Cache: Hot data access in 1-second level
Local Cache: User personal data available offline
Distributed Cache: Global data sharing, reducing redundant computations
Concurrent Processing
Supports concurrent processing of multiple user requests, ensuring system responsiveness.
Request Queue Management
class RequestQueue {
async processRequest(request: UserRequest): Promise<Response> {
// Priority sorting
const priority = this.calculatePriority(request);
// Resource allocation
const resources = await this.allocateResources(request);
// Parallel execution
return await this.executeWithConcurrency(request, resources);
}
}Scalability Design
Blockchain Network Expansion
Currently focused on Solana, but architectural design considers future multi-chain expansion needs.
Network Adapter Pattern
interface BlockchainAdapter {
networkId: string;
connect(): Promise<Connection>;
buildTransaction(intent: UserIntent): Promise<Transaction>;
estimateFees(transaction: Transaction): Promise<FeeEstimate>;
submitTransaction(transaction: Transaction): Promise<TransactionResult>;
}Functional Module Expansion
New features can be seamlessly integrated into existing systems through plugins.
Advanced Features
State Management
Sophisticated state management ensures data consistency across the application:
interface StateManager {
// Global state tracking
globalState: {
userSession: SessionData;
networkStatus: NetworkHealth;
marketData: MarketSnapshot;
};
// Local state caching
localCache: {
userPreferences: UserSettings;
recentTransactions: Transaction[];
portfolioData: PortfolioSnapshot;
};
// State synchronization
syncState(): Promise<void>;
invalidateCache(keys: string[]): void;
subscribeToUpdates(callback: StateUpdateCallback): void;
}Error Recovery
Intelligent error handling with automatic recovery mechanisms:
class ErrorRecovery {
async handleError(error: Error, context: ExecutionContext): Promise<RecoveryAction> {
// Classify error type
const errorType = this.classifyError(error);
// Determine recovery strategy
const strategy = this.selectRecoveryStrategy(errorType, context);
// Execute recovery
return await this.executeRecovery(strategy, context);
}
}Analytics and Monitoring
Built-in analytics for performance monitoring and optimization:
interface SDKAnalytics {
performance: {
responseTime: number;
successRate: number;
errorRate: number;
cacheHitRatio: number;
};
usage: {
apiCallCount: number;
popularFeatures: string[];
userPatterns: UsagePattern[];
};
quality: {
intentAccuracy: number;
userSatisfaction: number;
retryRate: number;
};
}The PandaV2 SDK's design philosophy is "simple surface, powerful core." Developers see clean APIs, but behind them lies a carefully optimized complex system. This design allows Mei to provide users with both simple and powerful Web3 experiences.
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