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

# Node Sale Platform

> Introduction to the Autheo Node Sale Platform: purchase node license NFTs, system requirements, connecting your wallet, and session management.

The Autheo Node Sale Platform is a decentralized application where you purchase node licenses represented as ERC-721 NFTs on the Arbitrum blockchain. Each license grants its holder the right to participate in the Autheo network — either by operating a validator node or delegating stake to earn rewards.

**Platform URL:** [https://tsp.autheo.com](https://tsp.autheo.com)

## What you can do

| Capability                | Description                                                                       |
| ------------------------- | --------------------------------------------------------------------------------- |
| Purchase node licenses    | Buy Core, Prime, or Sovereign node licenses as blockchain NFTs                    |
| Earn referral commissions | Generate a referral code to earn a commission on every purchase made with it      |
| Track orders              | Review all your personal purchases and all orders placed using your referral code |

## System requirements

### Supported browsers

| Browser         | Minimum version   |
| --------------- | ----------------- |
| Google Chrome   | 90+ (recommended) |
| Mozilla Firefox | 88+               |
| Microsoft Edge  | 90+               |
| Brave           | Latest            |

### Required wallet

| Wallet       | Notes                                         |
| ------------ | --------------------------------------------- |
| MetaMask     | Recommended. Browser extension or mobile app. |
| Trust Wallet | Supported via the in-app browser.             |

<Note>
  Your wallet must be connected to the **Arbitrum Sepolia** network (Chain ID: `421614`). The platform will prompt you to switch networks automatically if needed. Don't have MetaMask installed? See the [MetaMask installation guide](/getting-started/wallets/metamask-install).
</Note>

All transactions currently use testnet assets on Arbitrum Sepolia. Testnet ETH is available from the Arbitrum Sepolia faucet.

## Connecting your wallet

<Steps>
  <Step title="Navigate to the platform">
    Open your browser and go to the Node Sale Platform URL. You will see the login page.
  </Step>

  <Step title="Accept the terms and conditions">
    Before connecting your wallet, check all three agreement boxes:

    1. **Terms of Service** — Confirms you have read and agree to Autheo's terms
    2. **Privacy Policy** — Confirms you consent to data handling practices
    3. **Risk Acknowledgement** — Confirms you understand the risks associated with blockchain and cryptocurrency

    All three checkboxes must be checked before the wallet connection button becomes active.

    <img src="https://mintcdn.com/autheo/_s1JZ2AYeWfPo4OV/images/node-sale-accept-terms.png?fit=max&auto=format&n=_s1JZ2AYeWfPo4OV&q=85&s=7d0a8a099c27491402f4c22ad3dfdb5d" alt="Terms and conditions acceptance screen" width="1737" height="903" data-path="images/node-sale-accept-terms.png" />
  </Step>

  <Step title="Connect your wallet">
    1. Click **Connect Wallet**
    2. A wallet selector modal appears — choose MetaMask or Trust Wallet
    3. Your wallet extension opens and prompts you to connect your account. Approve the connection.
    4. You will be asked to sign a message in your wallet. This is a **Sign-In With Ethereum (SIWE)** authentication step — it does not cost gas and simply proves ownership of your wallet address.
    5. Review the message content and click **Sign** in your wallet.

    Upon successful sign-in, you are automatically redirected to the Purchase page.

    <img src="https://mintcdn.com/autheo/_s1JZ2AYeWfPo4OV/images/node-sale-connect-wallet-1.png?fit=max&auto=format&n=_s1JZ2AYeWfPo4OV&q=85&s=1c01f26ee6daf4c13ef5dae5735168a2" alt="Connect wallet step 1 — wallet selector modal" width="440" height="470" data-path="images/node-sale-connect-wallet-1.png" />

    <img src="https://mintcdn.com/autheo/_s1JZ2AYeWfPo4OV/images/node-sale-connect-wallet-2.png?fit=max&auto=format&n=_s1JZ2AYeWfPo4OV&q=85&s=77cf6772779c1c8086c9d382eacfba4d" alt="Connect wallet step 2 — wallet extension approval" width="1637" height="732" data-path="images/node-sale-connect-wallet-2.png" />

    <img src="https://mintcdn.com/autheo/_s1JZ2AYeWfPo4OV/images/node-sale-connect-wallet-3.png?fit=max&auto=format&n=_s1JZ2AYeWfPo4OV&q=85&s=f00dd836d4751df4825a5d1ba7d2fe32" alt="Connect wallet step 3 — SIWE signature request" width="1841" height="767" data-path="images/node-sale-connect-wallet-3.png" />
  </Step>
</Steps>

<Note>
  **About SIWE authentication** — Autheo uses Sign-In With Ethereum (EIP-4361) for login. No password is required. Your wallet signature proves your identity. The sign-in message is human-readable and shown in your wallet before signing. The signature only authorizes a session — it does not transfer funds or approve on-chain actions.
</Note>

If you close the wallet popup or reject the signature request, the login will not complete. Try again by clicking **Connect Wallet**.

To disconnect, click your wallet address in the top-right corner of the header. You will be logged out and redirected to the login page.

## Session management

| Behaviour         | Details                                                                                        |
| ----------------- | ---------------------------------------------------------------------------------------------- |
| Session expiry    | Your session expires after **15 minutes of inactivity**. Re-sign with your wallet to continue. |
| Access token      | Short-lived, stored in a secure cookie. Refreshed automatically while the session is active.   |
| Refresh token     | Used to silently obtain a new access token. If expired, you are automatically logged out.      |
| Wallet disconnect | Immediately clears all session tokens and redirects to the login page.                         |