# updateMetadata

Entrypoint to update yToken token metadata info.

### Types

```pascaligo
type newMetadataParams is map(string, bytes)

type updateMetadataParams is [@layout:comb] record [
  tokenId               : nat;
  token_metadata        : newMetadataParams;
]
```

### Usage

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

```typescript
const tokenId = 0; // or new BigNumber(0) or "0"
const tokenMetadata = MichelsonMap.fromLiteral({
  symbol: Buffer.from("TST2").toString("hex"),
  name: Buffer.from("TEST2").toString("hex"),
  decimals: Buffer.from("6").toString("hex"),
  icon: Buffer.from("").toString("hex"),
});
const yupana = await tezos.contract.at(yTokenAddress);
const operation = await yupana.methods.updateMetadata(
    tokenId, 
    tokenMetadata
).send();
await operation.confirmation();
```

{% endtab %}

{% tab title="🐍   Pytezos" %}

```python
token_id = 0
yupana = ContractInterface.from_michelson(code) # or client.contract(contract_address)...
call = yupana.updateMetadata(token_id, metadata_bytes)
opg = call.inject()
```

{% endtab %}
{% endtabs %}

### Errors

* `yToken/not-admin` - `sender` is not contract admin.