{
  "architecture": {
    "frontend": {
      "consumer": "React Native, TypeScript",
      "business": "React, Next.js"
    },
    "backend": {
      "api_gateway": "Node.js, Express",
      "services": [
        "user_management",
        "wallet_service", 
        "payment_processor",
        "card_issuer"
      ],
      "databases": {
        "primary": "PostgreSQL",
        "cache": "Redis"
      }
    },
    "blockchain": {
      "supported": [
        "Ethereum", "Bitcoin", 
        "Solana", "Polygon"
      ]
    },
    "security": {
      "encryption": "AES-256-GCM",
      "authentication": "JWT, 2FA"
    }
  }
}