# set\_token\_function

Method for set FA2 interface functions.

There are 7 functions that belong to [DEX methods](/smart-contracts/quipuswap-stable-swap-dex/standalone-dex/dex-methods.md).

```pascaligo
0n -> transfer_ep
1n -> get_balance_of
2n -> update_operators
3n -> update_token_metadata
4n -> total_supply_view
```

### Input parameters type

<table><thead><tr><th width="150">Field</th><th width="150" align="center">Type</th><th width="448.2">Description</th></tr></thead><tbody><tr><td>func</td><td align="center"><code>bytes</code></td><td><p>Packed bytes from </p><p><code>type token_func_t is (token_action_t * full_storage_t) -> full_return_t</code></p></td></tr><tr><td>index</td><td align="center"><code>nat</code></td><td>Index of the passed method to be set to the lambdas big_map</td></tr></tbody></table>

```pascaligo
type token_action_t     is
| Transfer                of transfer_param_t
| Balance_of              of bal_fa2_param_t
| Update_operators        of operator_param_t
| Update_metadata         of upd_meta_param_t
| Total_supply            of ts_v_param_t

type full_return_t      is list(operation) * full_storage_t
type token_func_t       is (token_action_t * full_storage_t) -> full_return_t

type set_lambda_func_t  is [@layout:comb] record [
  func                    : bytes;
  index                   : nat;
]
```

{% hint style="warning" %}
This contract method is called only by `admin` of that contract.
{% endhint %}


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