# update\_operators

Implementation of FA2 interface method, more info about FA2 update\_operators you can read in the link below.

{% embed url="<https://gitlab.com/tezos/tzip/-/blob/master/proposals/tzip-12/tzip-12.md#update_operators>" %}
TZIP-12: FA2 - Multi-Asset Interface&#x20;
{% endembed %}

### Types

{% code title="yToken/fa2Types.ligo" %}

```pascaligo
type tokenId is nat

type operatorParam is [@layout:comb] record [
  owner                 : address;
  operator              : address;
  token_id              : tokenId;
]

type updateOperatorParam is
| Add_operator        of operatorParam // adds operator
| Remove_operator     of operatorParam // removes operator

type updateOperatorParams is list(updateOperatorParam)
```

{% endcode %}

<table><thead><tr><th width="179.33333333333331" align="center">Parameter</th><th align="center">Type</th><th>Description</th></tr></thead><tbody><tr><td align="center">owner</td><td align="center">address</td><td>account owner tokens</td></tr><tr><td align="center">to_</td><td align="center">address</td><td>account operator tokens</td></tr><tr><td align="center">token_id</td><td align="center">nat</td><td>token identifier</td></tr></tbody></table>

### Usage

{% tabs %}
{% tab title="🌮 Taquito" %}

```typescript
const tokenId = 0; // or new BigNumber(0) or "0"
const alice = "tz1..."
const bob = "tz2..."
const peter = "tz3..."
const yupana = await tezos.contract.at(yTokenAddress);
const operation = await yupana.methods.update_operators([
        {
          add_operator: {
            owner: alice,
            operator: peter,
            token_id: tokenId,
          },
        },
        {
          remove_operator: {
            owner: alice,
            operator: bob,
            token_id: tokenId,
          },
        }
      ]).send();
await operation.confirmation();
```

{% endtab %}

{% tab title="🐍   Pytezos" %}

```python
token_id = 0
alice = "tz1..."
bob = "tz2..."
peter = "tz3..."
yupana = ContractInterface.from_michelson(code) # or client.contract(contract_address)...
call = yupana.update_operators([{
      "add_operator": {
        "owner": alice,
        "operator": peter,
        "token_id": token_id,
      },
    },
    {
      "remove_operator": {
        "owner": alice,
        "operator": bob,
        "token_id": token_id,
      },
    }
  ])
opg = call.inject()

```

{% endtab %}
{% endtabs %}

### Errors

* `FA2_NOT_OWNER` - `sender` is not `owner` of account.
* `FA2_TOKEN_UNDEFINED` - token identifier is not assigned to any known tokens.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://yupana-finance.gitbook.io/yupana-document-portal/developer-space/ytoken-contract-methods/fa2-token-entrypoints/update_operators.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.