> ## Documentation Index
> Fetch the complete documentation index at: https://docs.supermisson.fun/llms.txt
> Use this file to discover all available pages before exploring further.

# Wallet System

> How Supermission handles wallets, keys, and authentication. MPC infrastructure, non-custodial design, and zero-gas UX.

# Wallet architecture

Supermission uses Privy's MPC (Multi-Party Computation) infrastructure to give users a crypto wallet without any of the traditional pain points — no seed phrases, no gas management, no chain switching.

## How it works

<Steps>
  <Step title="User signs up">
    Email, Google OAuth, or connect an existing wallet (MetaMask, Coinbase Wallet, WalletConnect).
  </Step>

  <Step title="MPC wallet created">
    Privy generates a smart wallet on Base. The private key is split into multiple shards using MPC — no single party (including Supermission or Privy) ever has the full key.
  </Step>

  <Step title="Key reconstruction on sign-in">
    When you authenticate, the key shards are reconstructed securely in a trusted execution environment. You can sign transactions without ever seeing or managing a private key.
  </Step>

  <Step title="Transactions signed locally">
    Every trade is signed by your wallet. The signed transaction is submitted to the blockchain. Supermission cannot execute transactions without your authentication.
  </Step>
</Steps>

## Key properties

| Property               | Description                                                                                                   |
| ---------------------- | ------------------------------------------------------------------------------------------------------------- |
| **Non-custodial**      | Supermission never holds your funds or full private key. We technically cannot access your wallet.            |
| **No seed phrases**    | MPC eliminates the 24-word recovery phrase. Recovery is handled through your email/social login.              |
| **Sponsored gas**      | All transaction gas fees are covered. You never need ETH. Trades, bridges, redemptions — all free.            |
| **No chain switching** | Your wallet lives on Base. When you trade on Polymarket (Polygon), we bridge automatically. Invisible to you. |
| **Batch transactions** | Multiple operations (approve + swap, bridge + trade) can execute in a single click.                           |

## Multi-chain flow

Your wallet lives on Base, but trades execute on Polygon. Here's how that works seamlessly:

```
Your Base Wallet (USDC)
        │
        ▼ Circle CCTP Bridge
Polygon (USDC.e)
        │
        ▼ Polymarket CLOB
Position Created
        │
        ▼ On resolution / sell
USDC.e released on Polygon
        │
        ▼ Auto-bridge back
Your Base Wallet (USDC)
```

You see step 1 (confirm trade) and the last step (position in portfolio). Everything in between is invisible.

## Authentication flow

<Tabs>
  <Tab title="New User">
    1. Login via Privy (email code or Google OAuth)
    2. Privy creates embedded MPC wallet on Base
    3. Wallet address assigned to your account
    4. Waitlist check — if approved, full access granted
    5. Session token stored, auto-renewed
  </Tab>

  <Tab title="Returning User">
    1. Login via same method (email or Google)
    2. Privy reconstructs wallet from MPC shards
    3. Session validated against Supabase
    4. Full terminal access restored
  </Tab>

  <Tab title="Existing Wallet">
    1. Connect MetaMask, Coinbase Wallet, or WalletConnect
    2. External wallet linked to your Privy account
    3. Can use either embedded or external wallet for trading
    4. Multi-wallet support — link multiple wallets to one account
  </Tab>
</Tabs>

## Security model

<CardGroup cols={2}>
  <Card title="Key Compromise" icon="key">
    MPC splits your key across multiple parties. Compromising one shard is useless without the others. No single point of failure.
  </Card>

  <Card title="Phishing Protection" icon="shield-halved">
    No seed phrase to steal. No private key to export. Authentication is through your email/social provider with Privy's security infrastructure.
  </Card>

  <Card title="Gas Griefing" icon="gas-pump">
    Gas is fully sponsored by Supermission. You never need to hold ETH or worry about gas price manipulation.
  </Card>

  <Card title="Front-Running" icon="lock">
    Orders go directly to Polymarket's CLOB — not through a public mempool. No MEV exposure on your trades.
  </Card>
</CardGroup>

<Warning>
  Non-custodial means non-custodial. If you lose access to your email/social login and cannot recover through Privy's recovery flow, we cannot help you access your wallet. Secure your authentication credentials.
</Warning>

<Info>
  For developers building agents: server-side wallets are also available with AES-256 encrypted private key storage and configurable spending policies. See [Agent Economy](/agent-economy/overview) for details.
</Info>