# exitMarket

Allows user to indicate that underying token is no longer used as collateral by `tokenId`.

{% hint style="warning" %}
The `yToken` contract expects that underlying token infos of `tokenId`and **all borrowed** by user before `tokenId`s  are updated by calling [PriceFeed.getPrice](https://yupana-finance.gitbook.io/yupana-document-portal/developer-space/pricefeed-contract/getprice) and [updateInterest](https://yupana-finance.gitbook.io/yupana-document-portal/developer-space/ytoken-contract-methods/updateinterest) in the same block **before** this contract method
{% endhint %}

### Types

```pascaligo
type tokenId of nat // yToken tokenId related to market
```

### Usage

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

```typescript
const tokenId = 0; // or new BigNumber(0) or "0"
const amount = 10_000_000; // amount of yTokens to burn, pass 0 to burn all.
const yupana = await tezos.contract.at(yTokenAddress);
const proxy = await tezos.contract.at(proxyAddress);
const borrowedTokenIds = [1, 2]; // user borrowed tokens
const updBorrowed = borrowedTokenIds.reduce(
  (batch, tokenId) => {
    batch.push({
        kind: "transaction",
        ...yupana.methods.updateInterest(tokenId).toTransferParams(),
      },
      {
        kind: "transaction",
        ...proxy.methods.getPrice([tokenId]).toTransferParams(),
      });
      return batch;
    }
const batchArray = [
      ...updBorrowed,
      {
        kind: "transaction",
        ...yupana.methods.updateInterest(tokenId).toTransferParams(),
      },
      {
        kind: "transaction",
        ...proxy.methods.getPrice([tokenId]).toTransferParams(),
      },
      {
        kind: "transaction",
        ...yupana.methods.exitMarket(tokenId).toTransferParams(),
      },
    ];
const batch = await tezos.wallet.batch(batchArray);
const operation = await batch.send();
await operation.confirmation();
```

{% endtab %}

{% tab title="🐍   Pytezos" %}

```python
token_id = 0
amount = 10_000_000 # amount of yTokens to burn, pass 0 to burn all.
yupana = ContractInterface.from_michelson(code) # or client.contract(contract_address)...
proxy = ContractInterface.from_michelson(prx_code) # or client.contract(prx_contract_address)...
borrow_ids = [1, 2] # user borrowed tokens
borrow_updates = [yupana.updateInterest(borrow_token_id) for borrow_token_id in borrow_ids]
borrow_updates.append(proxy.getPrice([borrow_token_id for borrow_token_id in borrow_ids]))
call = pytezos.bulk(
        *borrow_updates,
        yupana.updateInterest(token_id),
        proxy.getPrice([token_id]),
        yupana.exitMarket(token_id)
    ).autofill().sign()
opg = call.inject()
```

{% endtab %}
{% endtabs %}

### Errors

* `yToken/debt-not-repaid` - user has unpaid debt.
* `yToken/need-update` - token price and interest not updated (see <mark style="color:orange;">warning</mark> above)
* `yToken/yToken-undefined` - token identifier is not assigned to any known yTokens.