# SaleControlUpgradeable
[Git Source](https://github.com/buildship-dev/nft-contracts/blob/fd1c33a9dbefe42158dfc60d10c0afde05c713aa/contracts/extensions/allowlist-factory/base/SaleControlUpgradeable.sol)

**Inherits:**
OwnableUpgradeable


## State Variables
### __SALE_NEVER_STARTS

```solidity
uint256 public constant __SALE_NEVER_STARTS = 2 ** 256 - 1;
```


### startTimestamp

```solidity
uint256 public startTimestamp;
```


## Functions
### initialize


```solidity
function initialize() internal onlyInitializing;
```

### whenSaleStarted


```solidity
modifier whenSaleStarted();
```

### updateStartTimestamp


```solidity
function updateStartTimestamp(uint256 _startTimestamp) public onlyOwner;
```

### startSale


```solidity
function startSale() public onlyOwner;
```

### stopSale


```solidity
function stopSale() public onlyOwner;
```

### saleStarted


```solidity
function saleStarted() public view returns (bool);
```