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Wallet Architecture Overview

ARGUS provides a unified wallet interface that supports both standard wallet operations and secure Argus Vault storage, all within a single application.

Architecture Overview​

ARGUS is built as a Chrome extension that provides:

  • Standard Wallet: Fast, convenient transactions for daily use
  • Argus Vault: Multi-layer secure storage for high-value holdings
  • Unified Interface: Seamless switching between wallet types

Standard Wallet Architecture​

The standard wallet operates like a traditional hot wallet:

┌──────────────────────────────────────┐
│          Chrome Extension             │
│  ┌────────────────────────────────┐  │
│  │     User Interface (React)     │  │
│  └────────────┬───────────────────┘  │
│               │                       │
│  ┌────────────▼───────────────────┐  │
│  │    Transaction Construction    │  │
│  │       (Solana Web3.js)         │  │
│  └────────────┬───────────────────┘  │
│               │                       │
│  ┌────────────▼───────────────────┐  │
│  │   Encrypted Private Key        │  │
│  │   (chrome.storage.sync)        │  │
│  └────────────┬───────────────────┘  │
│               │                       │
│  ┌────────────▼───────────────────┐  │
│  │    Client-Side Signing         │  │
│  │     (No server involved)       │  │
│  └────────────┬───────────────────┘  │
└───────────────┼───────────────────────┘
                │
                ▼
       Solana Network (RPC)

Key Characteristics​

  • Single Keypair: Standard Solana keypair wallet
  • Client-Side Signing: All signing happens locally
  • No Server Dependency: Transactions don't require ARGUS backend
  • Fast: Instant transaction execution
  • Simple: Works like any standard wallet

Argus Vault Architecture​

Argus Vault uses Squads V4 multisig with server-side verification:

┌──────────────────────────────────────────────────┐
│              Chrome Extension                     │
│  ┌───────────────────────────────────────────┐  │
│  │      User Interface (React)               │  │
│  └───────────────┬───────────────────────────┘  │
│                  │                                │
│  ┌───────────────▼───────────────────────────┐  │
│  │   Create Multisig Proposal                │  │
│  │     (Squads SDK)                          │  │
│  └───────────────┬───────────────────────────┘  │
│                  │                                │
│  ┌───────────────▼───────────────────────────┐  │
│  │   User Signs Proposal                     │  │
│  │   (User wallet signature)                  │  │
│  └───────────────┬───────────────────────────┘  │
└──────────────────┼───────────────────────────────┘
                   │
                   ▼
┌──────────────────────────────────────────────────┐
│              ARGUS Backend Server                 │
│  ┌───────────────────────────────────────────┐  │
│  │   Voice Verification                      │  │
│  │   (MFCC comparison)                       │  │
│  └───────────────┬───────────────────────────┘  │
│                  │                                │
│  ┌───────────────▼───────────────────────────┐  │
│  │   Geographic Verification                 │  │
│  │   (Haversine distance)                    │  │
│  └───────────────┬───────────────────────────┘  │
│                  │                                │
│  ┌───────────────▼───────────────────────────┐  │
│  │   Hardware/Bluetooth/Biometric Checks     │  │
│  └───────────────┬───────────────────────────┘  │
│                  │                                │
│  ┌───────────────▼───────────────────────────┐  │
│  │   Server Co-Signs Proposal                │  │
│  │   (If all verifications pass)             │  │
│  └───────────────┬───────────────────────────┘  │
└──────────────────┼───────────────────────────────┘
                   │
                   ▼
          Solana Network (RPC)
                   │
                   ▼
┌──────────────────────────────────────────────────┐
│           Squads V4 Smart Contract                │
│  ┌───────────────────────────────────────────┐  │
│  │   Verify 2-of-2 signatures present        │  │
│  └───────────────┬───────────────────────────┘  │
│                  │                                │
│  ┌───────────────▼───────────────────────────┐  │
│  │   Execute transaction from Vault PDA      │  │
│  └───────────────────────────────────────────┘  │
└──────────────────────────────────────────────────┘

Key Characteristics​

  • Multisig Account: Squads V4 multisig (2-of-2)
  • Server Co-Signing: ARGUS backend verifies security layers
  • On-Chain Enforcement: Squads smart contract enforces rules
  • Secure: Multiple independent security layers
  • Flexible: Configurable security based on needs

Unified User Experience​

Despite architectural differences, ARGUS presents a seamless interface:

Wallet Selector​

Users can switch between wallet types easily:

┌─────────────────────────┐
│  ▼ Wallet      SOL  │  ← Dropdown selector
├─────────────────────────┤
│  ○ Standard Wallet      │
│  ◉ Argus Vault            │  ← Switch between wallets
└─────────────────────────┘

Transaction Interface​

Both wallets use the same UI flow:

  1. Select token
  2. Enter recipient and amount
  3. Review transaction
  4. Approve (different verification based on wallet type)

The user doesn't need to understand the underlying architecture—ARGUS handles the complexity.

Balance Display​

Users see balances for both wallet types:

┌─────────────────────────────────┐
│  Standard Wallet    Argus Vault    │
│  ◉ 0.5 SOL         ○ 100 SOL   │
│  $65 USD           $13,000 USD │
└─────────────────────────────────┘

Technical Stack​

Frontend​

  • Framework: React + TypeScript
  • Platform: Chrome Extension (Plasmo)
  • Blockchain: Solana Web3.js
  • Multisig: Squads SDK

Backend​

  • Runtime: Node.js + Express
  • Database: PostgreSQL (Prisma ORM)
  • Security: Voice verification, geographic checks
  • Blockchain: Solana RPC integration

On-Chain​

  • Multisig: Squads Protocol V4
  • Program ID: SQDS4ep65T869zMMBKyuUq6aD6EgTu8psMjkvj52pCf
  • Enforcement: Smart contract-based

Data Flow​

Standard Wallet Transaction​

User → UI → Transaction Construction → Sign (local) → Broadcast → Solana Network

Time: < 2 seconds Server: Not required

Argus Vault Transaction​

User → UI → Proposal Creation → Sign (local) → Server Verification → 
Server Co-Sign → Execute → Solana Network → Squads V4

Time: 30-60 seconds Server: Required for verification

Security Architecture​

Standard Wallet​

  • Encryption: AES-256-GCM
  • Storage: Chrome storage (encrypted at rest)
  • Signing: Client-side only
  • Protection: Password-based

Argus Vault​

  • Multisig: 2-of-2 (user + server)
  • Verification: Multiple independent layers
  • Enforcement: On-chain via Squads V4
  • Protection: Multi-layer defense-in-depth

Key Takeaways​

  1. Unified Interface: Single application, multiple security levels
  2. Flexible Architecture: Standard wallet for speed, Argus Vault for security
  3. Invisible Multisig: Users don't see multisig complexity
  4. On-Chain Enforcement: Security exists independently of infrastructure
  5. User-Friendly: Complex security made simple

ARGUS architecture provides the flexibility to choose security level while maintaining a simple, unified user experience.

Next Steps​