> 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/api-and-sdk/private_key/liquidation.md).

# Liquidation

## Encode ContractPrice

| Name        | Rule                                                                              |
| ----------- | --------------------------------------------------------------------------------- |
| pariId      | 1 byte                                                                            |
| marketPrice | 15 bytes, encode in big endian, then pass to the `pad_front` function in Rsut SDK |

## Encode OrderPriceInfo

| Name        | Rule                                                                             |
| ----------- | -------------------------------------------------------------------------------- |
| tokenId     | 2 byte, change to `u16`, then encode in big endian                               |
| marketPrice | 15 bytes, encode in big endian, then pass to the`pad_front` function in Rust SDK |

## Encode Liquidation

| Name                 | Rule                                                                                     |
| -------------------- | ---------------------------------------------------------------------------------------- |
| type                 | 1 byte, `0x0d`                                                                           |
| accountId            | 4 bytes                                                                                  |
| subAccountId         | 1 byte                                                                                   |
| accountIdNonce       | 4 bytes                                                                                  |
| oraclePrices         | 31 bytes                                                                                 |
| liquidationAccountId | 4 bytes                                                                                  |
| fee                  | 2 bytes, refer to `fee` pack method in [BigUint pack algorithm](#biguint-pack-algorithm) |
| feeToken             | 2 bytes                                                                                  |

49 bytes in total, where the `oraclePrices` encode process is as blew:

* Encode the `oraclePrices` into a bytes list in order;
* Pass the bytes list to the SDK `rescue_hash` function then get the 31 bytes result.

## Example

```json
{
  "type": "Liquidation",
  "accountId": 1,
  "subAccountId": 2,
  "subAccountNonce": 3,
  "oraclePrices": {
    "contractPrices": [
      {
        "pairId": 1,
        "marketPrice": "123"
      }
    ],
    "marginPrices": [
      {
        "tokenId": 1,
        "price": "456"
      }
    ]
  },
  "liquidationAccountId": 3,
  "fee": "1450",
  "feeToken": 3,
  "signature": {
    "pubKey": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "signature": "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
  }
}
encode_bytes = [10, 0, 0, 0, 1, 2, 0, 0, 0, 3, 141, 200, 177, 63, 187, 15, 209, 184, 131, 185, 181, 117, 121, 115, 86, 252, 98, 58, 122, 70, 129, 240, 191, 202, 67, 248, 16, 60, 117, 39, 91, 0, 0, 0, 3, 0, 3, 181, 64]
```


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