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

# Approve Max Builder Fee

> Approve maximum builder fee for a Trading Account

**Function:**

```
{package}::dex_accounts_entry::approve_max_builder_fee_for_subaccount
```

**ABI Object:**

```typescript theme={null}
const functionAbi: MoveFunction = {
  name: "approve_max_builder_fee_for_subaccount",
  visibility: "private",
  is_entry: true,
  is_view: false,
  generic_type_params: [],
  params: [
    "&signer",
    "0x1::object::Object<{package}::dex_accounts::Subaccount>",
    "address",
    "u64",
  ],
  return: [],
};
```

**Parameters:**

* `signer` - The account signer
* `subaccount` - The Trading Account object
* `builder_addr` - The builder address
* `max_fee` - Maximum fee in basis points (u64)

**Example:**

<CodeGroup>
  ```typescript Typescript theme={null}
  const transaction = await aptos.transaction.build.simple({
    sender: account.accountAddress,
    data: {
      function: `${PACKAGE}::dex_accounts_entry::approve_max_builder_fee_for_subaccount`,
      typeArguments: [],
      functionArguments: [
        "0x123...abc", // subaccountAddr
        "0xabc...123", // builderAddr (builder/referrer address)
        50, // maxFee (50 basis points = 0.5%)
      ],
    },
  });
  ```

  ```python Python theme={null}
  transaction = rest_client.build_transaction(
      sender=account.address(),
      payload={
          "function": f"{PACKAGE}::dex_accounts_entry::approve_max_builder_fee_for_subaccount",
          "type_arguments": [],
          "function_arguments": [
              "0x123...abc",  # subaccountAddr
              "0xabc...123",  # builderAddr (builder/referrer address)
              50,  # maxFee (50 basis points = 0.5%)
          ],
      },
  )
  ```
</CodeGroup>