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

# Billing

> Pay with USDC on Arc Testnet and understand tier limits.

Eternum billing uses manual monthly USDC payments on Arc Testnet.

## Plans

| Plan   | Price           | Vault items | Trusted contacts | Beneficiaries | Check-in interval |
| ------ | --------------- | ----------- | ---------------- | ------------- | ----------------- |
| Seed   | Free            | 3           | 2                | 2             | 30 days           |
| Legacy | 5 USDC / month  | Unlimited   | 5                | 5             | 7 days            |
| Estate | 15 USDC / month | Unlimited   | Unlimited        | Unlimited     | 3 days            |

## Pay with USDC

<Steps>
  <Step title="Open Billing">
    Go to Billing from the app sidebar.
  </Step>

  <Step title="Connect a wallet">
    Choose a browser wallet from the wallet selector. Eternum uses wagmi to discover installed wallet extensions.
  </Step>

  <Step title="Switch to Arc Testnet">
    Your wallet may ask to add or switch networks. Use chain ID `5042002` and RPC `https://rpc.testnet.arc.network`.
  </Step>

  <Step title="Approve the USDC transfer">
    The app sends USDC to the configured receiving wallet and receives a transaction hash.
  </Step>

  <Step title="Wait for verification">
    The backend verifies the transaction receipt, recipient, sender, token contract, and amount before updating your tier.
  </Step>
</Steps>

## Arc Testnet details

```text theme={null}
Network name: Arc Testnet
Chain ID: 5042002
RPC URL: https://rpc.testnet.arc.network
Currency symbol: USDC
Block explorer: https://testnet.arcscan.app
USDC contract: 0x3600000000000000000000000000000000000000
```

## Renewal and grace period

Paid tiers are valid for 30 days. If a paid tier expires, Eternum enters a grace period before downgrading the account to Seed.

<Note>
  Billing is currently on Arc Testnet. Testnet payments do not represent production payment settlement.
</Note>