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travlrnode/
├── src/
│   ├── api/            # REST API implementation
│   ├── blockchain/     # Blockchain integrations
│   ├── data/          # Data management
│   ├── did/           # DID implementation
│   ├── p2p/           # P2P networking
│   ├── contracts/     # Smart contracts
│   └── testing/       # Test utilities
├── docs/              # Documentation
├── tests/             # Test suites
└── scripts/           # Development scripts

# Install dependencies
npm install

# Start development server
npm run dev

# Run tests
npm test

# Build project
npm run build

{
  "devDependencies": {
    "@types/jest": "^29.5.0",
    "@types/node": "^18.15.11",
    "jest": "^29.5.0",
    "ts-jest": "^29.1.0",
    "typescript": "^5.0.4"
  }
}

// Use interfaces for plugin definitions
interface BlockchainPlugin {
  connect(): Promise<void>;
  disconnect(): Promise<void>;
  // ... additional methods
}

// Use classes for implementations
class EthereumPlugin implements BlockchainPlugin {
  private web3: Web3;
  private contract: Contract;

  constructor(config: EthereumConfig) {
    // Implementation
  }
}

# Feature branches
feature/add-new-blockchain
feature/improve-p2p-performance

# Bug fix branches
fix/blockchain-connection
fix/memory-leak

# Documentation branches
docs/api-documentation
docs/setup-guide

# Format
<type>(<scope>): <description>

# Examples
feat(blockchain): add Sui blockchain support
fix(p2p): resolve peer discovery issue
docs(api): update REST API documentation

// Example test suite
describe('AccessControl', () => {
  let accessControl: AccessControl;
  let blockchain: BlockchainPlugin;

  beforeEach(() => {
    blockchain = new MockBlockchainPlugin();
    accessControl = new AccessControl(blockchain);
  });

  test('should grant access', async () => {
    const result = await accessControl.grantAccess(
      'did:example:123',
      'did:example:456',
      'testKey',
      Date.now() + 3600000
    );
    expect(result).toBeTruthy();
  });
});

describe('Node Integration', () => {
  let node: any;

  beforeAll(async () => {
    node = await runNode();
  });

  afterAll(async () => {
    await node.stop();
  });

  test('should store and retrieve data', async () => {
    const key = 'test_key';
    const value = { test: 'data' };
    
    await node.dataStore.setData(key, value);
    const retrieved = await node.dataStore.getData(key);
    
    expect(retrieved).toEqual(value);
  });
});

describe('Performance Tests', () => {
  test('should handle multiple concurrent requests', async () => {
    const requests = Array(100).fill(null).map(() => 
      accessControl.grantAccess(
        'did:example:123',
        'did:example:456',
        'testKey',
        Date.now() + 3600000
      )
    );
    
    const results = await Promise.all(requests);
    expect(results.every(Boolean)).toBeTruthy();
  });
});

{
  "version": "0.2.0",
  "configurations": [
    {
      "type": "node",
      "request": "launch",
      "name": "Debug TravlrNode",
      "program": "${workspaceFolder}/src/index.ts",
      "preLaunchTask": "tsc: build - tsconfig.json",
      "outFiles": ["${workspaceFolder}/dist/**/*.js"],
      "env": {
        "DEBUG": "travlrnode:*"
      }
    }
  ]
}

const debug = require('debug')('travlrnode');

class BlockchainService {
  async connect() {
    debug('Connecting to blockchain...');
    try {
      // Connection logic
      debug('Connected successfully');
    } catch (error) {
      debug('Connection failed:', error);
      throw error;
    }
  }
}

# Production build
npm run build

# Run type checking
npm run type-check

# Run linting
npm run lint

# .github/workflows/ci.yml
name: CI

on: [push, pull_request]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v2
      - run: npm ci
      - run: npm run build
      - run: npm test

# Update version
npm version patch|minor|major

# Build documentation
npm run build-docs

# Create release
npm run create-release

class CacheManager {
  private cache: Map<string, any>;
  private ttl: number;

  constructor(ttl: number = 3600000) {
    this.cache = new Map();
    this.ttl = ttl;
  }

  async get(key: string, fetchFn: () => Promise<any>) {
    if (this.cache.has(key)) {
      return this.cache.get(key);
    }

    const value = await fetchFn();
    this.cache.set(key, value);
    return value;
  }
}

class MemoryManager {
  private maxSize: number;
  private currentSize: number;

  constructor(maxSize: number) {
    this.maxSize = maxSize;
    this.currentSize = 0;
  }

  async cleanup() {
    if (this.currentSize > this.maxSize) {
      // Implement cleanup logic
    }
  }
}

// Input validation
function validateInput(input: any): boolean {
  // Implement validation logic
  return true;
}

// Secure data handling
async function handleSensitiveData(data: any): Promise<void> {
  // Implement secure handling
}

class AuthenticationManager {
  async validateToken(token: string): Promise<boolean> {
    // Implement token validation
    return true;
  }

  async generateToken(userId: string): Promise<string> {
    // Implement token generation
    return 'token';
  }
}

/**
 * Manages access control for data sharing
 * @class AccessControl
 */
class AccessControl {
  /**
   * Grants access to data
   * @param {string} granterDID - The DID of the access granter
   * @param {string} granteeDID - The DID of the access grantee
   * @param {string} dataKey - The key of the data
   * @param {number} expirationTime - The access expiration timestamp
   * @returns {Promise<string>} The transaction hash
   */
  async grantAccess(
    granterDID: string,
    granteeDID: string,
    dataKey: string,
    expirationTime: number
  ): Promise<string> {
    // Implementation
  }
}

/**
 * @swagger
 * /api/v1/access:
 *   post:
 *     summary: Grant access to data
 *     parameters:
 *       - name: granterDID
 *         in: body
 *         required: true
 *         schema:
 *           type: string
 */