> ## Documentation Index
> Fetch the complete documentation index at: https://thrackle.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# ProtocolERC20Pricing

[Git Source](https://github.com/forte-service-company-ltd/forte-rules-engine/blob/6b9ac124d2cb0fe47a8b5c261a1dd458067f45ea/src/client/pricing/ProtocolERC20Pricing.sol)

**Inherits:**
Ownable, [IApplicationEvents](/v1/reference/common/IEvents.sol/interface.IApplicationEvents), [IProtocolERC20Pricing](/v1/reference/common/IProtocolERC20Pricing.sol/interface.IProtocolERC20Pricing)

**Author:**
@ShaneDuncan602, @oscarsernarosero, @TJ-Everett

This contract is a simple pricing mechanism only. Its main purpose is to store prices.

*This contract doesn't allow any marketplace operations.*

## State Variables

### VERSION

```solidity
string private constant VERSION = "1";
```

### tokenPrices

```solidity
mapping(address => uint256) public tokenPrices;
```

## Functions

### setSingleTokenPrice

that the token is the whole token and not its atomic unit. This means that if an
ERC20 with 18 decimals has a price of 2 dollars, then its atomic unit would be 2/10^18 USD.
999\_999\_999\_999\_999\_999 = 0xDE0B6B3A763FFFF, 1\_000\_000\_000\_000\_000\_000 = DE0B6B3A7640000

*set the price for a single Token*

```solidity
function setSingleTokenPrice(address tokenContract, uint256 price) external onlyOwner;
```

**Parameters**

| Name            | Type      | Description                                                 |
| --------------- | --------- | ----------------------------------------------------------- |
| `tokenContract` | `address` | is the address of the Token contract                        |
| `price`         | `uint256` | price of the Token in weis of dollars. 10^18 => \$ 1.00 USD |

### getTokenPrice

that the price is for the whole token and not of its atomic unit. This means that if
an ERC20 with 18 decimals has a price of 2 dollars, then its atomic unit would be 2/10^18 USD.
999\_999\_999\_999\_999\_999 = 0xDE0B6B3A763FFFF, 1\_000\_000\_000\_000\_000\_000 = DE0B6B3A7640000

*gets the price of a Token. It will return the Token's specific price.*

```solidity
function getTokenPrice(address tokenContract) external view returns (uint256 price);
```

**Parameters**

| Name            | Type      | Description                          |
| --------------- | --------- | ------------------------------------ |
| `tokenContract` | `address` | is the address of the Token contract |

**Returns**

| Name    | Type      | Description                                           |
| ------- | --------- | ----------------------------------------------------- |
| `price` | `uint256` | of the Token in weis of dollars. 10^18 => \$ 1.00 USD |

### version

*gets the version of the contract*

```solidity
function version() external pure returns (string memory);
```

**Returns**

| Name     | Type     | Description |
| -------- | -------- | ----------- |
| `<none>` | `string` | VERSION     |