# Web3 Integration

## <mark style="color:purple;">Web3 Integration</mark>

Native Web3 support with signing sandbox protection.

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### <mark style="color:purple;">Wallet Architecture</mark>

**Multi-network wallet manager:**

#### Supported Networks

* Ethereum mainnet
* EVM-compatible chains (BSC, Polygon, Arbitrum, Optimism, Avalanche)
* Layer 2 solutions
* Testnets (Goerli, Sepolia, Mumbai, etc.)

#### Key Management

* Local keystore (encrypted)
* Hardware wallet integration (Ledger, Trezor)
* Profile-scoped wallets
* Watch-only wallet support

#### Seed Phrase Security

* Zero-knowledge vault storage
* Hardware-backed encryption (when available)
* Never transmitted externally
* Profile isolation

### <mark style="color:purple;">Signing Sandbox</mark>

**Transaction interception and analysis:**

#### Interception Layer

Catches all wallet interactions:

* `eth_sign`
* `personal_sign`
* `eth_signTypedData`
* `eth_sendTransaction`
* Contract interactions

#### Translation Engine

Converts hex to plain English:

**Input:** `0x095ea7b3000000000000000000000000...`

**Output:** "Approve Uniswap Router to spend **unlimited DAI** from your wallet"

#### Policy Engine

Checks transactions against rules:

* Per-dApp spending limits
* Contract whitelist/blacklist
* Function call restrictions
* Token approval limits
* Maximum gas price

#### Risk Assessment

Assigns risk scores:

* **Low** - Standard swap on known DEX
* **Medium** - New contract interaction
* **High** - Unlimited token approval
* **Critical** - Signature requests with broad permissions

### <mark style="color:purple;">dApp Permissions</mark>

**Granular permission system:**

#### Connection Management

* Per-dApp wallet connection permissions
* Network restrictions per dApp
* Auto-reject unknown dApps
* One-click revoke

#### Permission Scoping

Example for Uniswap:

* Can request signatures: Yes
* Can access: 0xYourAddress
* Networks allowed: Ethereum mainnet
* Max approval: 1 ETH equivalent
* Approved functions: Swap only
* Unlimited approvals: Blocked

#### Audit Trail

* Log all dApp interactions
* Transaction history per dApp
* Permission change tracking
* Export audit logs

### <mark style="color:purple;">Privacy Mixer</mark>

**On-chain privacy protocol:**

#### Architecture

* Zero-knowledge proof system
* Deposit and withdrawal anonymity sets
* Configurable mixing delays
* Multi-hop mixing support

#### Supported Assets

* Native tokens (ETH, BNB, MATIC)
* ERC-20 tokens
* Cross-chain bridge integration

#### Privacy Guarantees

* Break sender-receiver link
* Untraceable withdrawals
* Anonymity set size visualization
* No address correlation

### <mark style="color:purple;">Private Swaps</mark>

**MEV-resistant trading:**

#### Implementation

* Order flow encryption
* Private transaction pool submission
* Flashbots integration
* Direct block builder communication

#### Benefits

* No front-running
* No sandwich attacks
* Better execution prices
* Transaction privacy

### <mark style="color:purple;">Test Sandbox</mark>

**Safe testing environment:**

#### Testnet Support

* Full feature parity on testnets
* Automatic testnet faucet integration
* Switch networks without wallet reset
* Parallel mainnet/testnet profiles

#### Safety Features

* Obvious visual indicators (testnet = orange UI)
* Confirmation required to switch to mainnet
* Prevent accidental mainnet transactions during testing

### <mark style="color:purple;">RPC Management</mark>

**Custom RPC endpoints:**

#### Built-in RPCs

* Primary and fallback RPCs per network
* Load balancing across endpoints
* Automatic failover

#### Custom RPCs

* Add private RPC endpoints
* Configure per profile
* Latency monitoring
* Health checks

### Contract Interaction

**Safe contract calls:**

#### ABI Decoding

* Automatic ABI detection for verified contracts
* Function signature database
* Parameter decoding
* Return value parsing

#### Contract Verification

* Check Etherscan verification status
* Display contract source (if verified)
* Warning for unverified contracts
* Community reputation scores

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Native Web3 with undrainable protection.

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