# Contract used to store layout for the PreSaleSTO storage (PreSaleSTOStorage.sol)

View Source: [contracts/modules/STO/PreSale/PreSaleSTOStorage.sol](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/contracts/modules/STO/PreSale/PreSaleSTOStorage.sol)

**↘ Derived Contracts:** [**PreSaleSTO**](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/PreSaleSTO.md)**,** [**PreSaleSTOProxy**](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/PreSaleSTOProxy.md)

**PreSaleSTOStorage**

## Contract Members

**Constants & Variables**

```javascript
mapping(address => uint256) public investors;
```

## Functions