# OrderMatching

### type ContractPrice

#### constructor

```javascript
/**
* @param {number} pair_id
* @param {string} market_price
*/
ContractPrice(pair_id, market_price)
```

**input:**

* pair\_id: The contract pair id defined by zkLink.
* market\_price: The market price of the contract pair

### type SpotPriceInfo

#### constructor

```javascript
/**
* @param {number} token_id
* @param {string} price
*/
SpotPriceInfo(token_id, price)
```

**input:**

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

### type Order

The [Order](https://docs.zk.link/developer/api-and-sdk/transaction/order_matching) struct of taker and maker.

#### constructor

```javascript
/**
* @param {number} account_id
* @param {number} sub_account_id
* @param {number} slot_id
* @param {number} nonce
* @param {number} base_token_id
* @param {number} quote_token_id
* @param {string} amount
* @param {string} price
* @param {boolean} is_sell
* @param {number} maker_fee_rate
* @param {number} taker_fee_rate
* @param {boolean} has_subsidy
*/
Order(account_id, sub_account_id, slot_id, nonce, base_token_id, quote_token_id, amount, price, is_sell, maker_fee_rate, taker_fee_rate, has_subsidy)
```

#### func sign

```javascript
/**
* @param {ZkLinkSigner} signer
* @returns {any}
*/
sign(signer)
```

Sign order with given [ZkLinkSigner](https://docs.zk.link/developer/sdk/signer#type-zklinksigner)

### type OrderMatchingBuilder

#### constructor

```javascript
/**
* @param {number} account_id
* @param {number} sub_account_id
* @param {Order} taker
* @param {Order} maker
* @param {string} fee
* @param {number} fee_token
* @param {ContractPrice[]} contract_prices
* @param {SpotPriceInfo[]} margin_prices
* @param {string} expect_base_amount
* @param {string} expect_quote_amount
*/
OrderMatchingBuilder(account_id, sub_account_id, taker, maker, fee, fee_token, contract_prices, margin_prices, expect_base_amount, expect_quote_amount)
```

### type OrderMatching

[OrderMatching](https://docs.zk.link/developer/api-and-sdk/transaction/order_matching) transaction type.

#### constructor

```javascript
/**
* @param {OrderMatchingBuilder} builder
*/
newOrderMatching(builder)
```

#### func sign

```javascript
/**
* @param {ZkLinkSigner} signer
* @returns {any}
*/
sign(signer)
```

Sign transaction with given [ZkLinkSigner](https://docs.zk.link/developer/sdk/signer#type-zklinksigner)