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

# Approvals & Claims

> USDC allowances, rebate claims, and builder codes.

## USDC approval

Trading collateral is pulled from your wallet, so USDC must be approved to the protocol once:

```python theme={null}
await client.account.approve_usdc()          # unlimited, to TradingStorage
await client.account.approve_usdc(5000)      # or a fixed amount
```

```python theme={null}
info = await client.account.allowance()      # {"balance": ..., "allowance": ...} + human floats
```

<Warning>
  Approvals must come from the **trader's own key**; they cannot be routed through a delegate/API key. If you onboarded via the [Avantis API Key Generator](https://delegate.avantisfi.com/), USDC was approved in the same flow and you can skip this.
</Warning>

### LP vault approval is separate

The LP vault pulls from an allowance on the **tranche**, not TradingStorage:

```python theme={null}
meta = await client.meta()
tranche = meta["addresses"]["tranche"]
await client.account.approve_usdc(1000, spender=tranche)
```

See [LP vault](/more/lp-vault).

## Claims

Both are caller-scoped: the signing key must be the account that earned them (no delegate):

```python theme={null}
await client.account.claim_rebate()           # referral rebates (you are the referrer)
await client.account.claim_keeper_rewards()   # keeper rewards
```

## Builder codes

Partners routing order flow can register a builder code that collects a per-trade fee:

```python theme={null}
await client.account.register_builder_code(
    "MYAPP",
    fee_collector="0x...",
    is_percent_fee=True,
    fee_percent=1,            # 1 = 1%
)
```

`modify_builder_code(...)` (same parameters) updates it. Set `builder_code` in the [configuration](/configuration) to attach your code to outgoing orders.