> For the complete documentation index, see [llms.txt](https://docs.zk.link/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zk.link/developer/sdk/changelog-2/transactions/9-liquidation.md).

# Liquidation

### type ContractPrice

```dart
ContractPrice(
    int pairId,
    String marketPrice,
)
```

**input:**

* pairId: The contract pair id defined by zkLink.
* marketPrice: The market price of the contract pair

### type SpotPriceInfo

```dart
SpotPriceInfo(
    int tokenId,
    String price,
)
```

**input:**

* tokenId: The token id defined by zkLink.
* price: The spot price of the token.

### type Liquidation

[Liquidation](/developer/api-and-sdk/transaction/liquidation.md) transaction type.

```dart
Liquidation(
    int accountId,
	int subAccountId,
	int subAccountNonce,
	List<ContractPrice> contractPrices,
	List<SpotPriceInfo> marginPrices,
	int adlAccountId,
	int pairId,
	String adlSize,
	String adlPrice,
	String fee,
	int feeToken,
)
```

#### func sign

```dart
void sign(ZkLinkSigner zkLinkSigner)
```

Sign transaction with given [ZkLinkSigner](/developer/sdk/changelog-2/signer.md#type-zklinksigner)

#### func toJson

```dart
String toJson()
```

Get the json str of [Liquidation](#type-liquidation)