# I Price Provider Aggregator

## Methods

### MODERATOR\_ROLE

```solidity
function MODERATOR_ROLE() external view returns (bytes32)
```

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | bytes32 | undefined   |

### changeActive

```solidity
function changeActive(address priceProvider, address token, bool active) external nonpayable
```

#### Parameters

| Name          | Type    | Description |
| ------------- | ------- | ----------- |
| priceProvider | address | undefined   |
| token         | address | undefined   |
| active        | bool    | undefined   |

### getEvaluation

```solidity
function getEvaluation(address token, uint256 tokenAmount) external view returns (uint256 evaluation)
```

*returns the USD evaluation of token by its `tokenAmount`*

#### Parameters

| Name        | Type    | Description                      |
| ----------- | ------- | -------------------------------- |
| token       | address | the address of token to evaluate |
| tokenAmount | uint256 | the amount of token to evaluate  |

#### Returns

| Name       | Type    | Description |
| ---------- | ------- | ----------- |
| evaluation | uint256 | undefined   |

### getEvaluationSigned

```solidity
function getEvaluationSigned(address token, uint256 tokenAmount, uint256 priceMantissa, uint8 priceDecimals, uint256 validTo, bytes signature) external view returns (uint256 evaluation)
```

*returns the USD evaluation of token by its `tokenAmount`*

#### Parameters

| Name          | Type    | Description                                                  |
| ------------- | ------- | ------------------------------------------------------------ |
| token         | address | the address of token                                         |
| tokenAmount   | uint256 | the amount of token including decimals                       |
| priceMantissa | uint256 | - the price of token (used in verifying the signature)       |
| priceDecimals | uint8   | - the price decimals (used in verifying the signature)       |
| validTo       | uint256 | - the timestamp in seconds (used in verifying the signature) |
| signature     | bytes   | - the backend signature of secp256k1. length is 65 bytes     |

#### Returns

| Name       | Type    | Description |
| ---------- | ------- | ----------- |
| evaluation | uint256 | undefined   |

### getPrice

```solidity
function getPrice(address token) external view returns (uint256 priceMantissa, uint8 priceDecimals)
```

price = priceMantissa / (10 \*\* priceDecimals)

*returns tuple (priceMantissa, priceDecimals)*

#### Parameters

| Name  | Type    | Description                                  |
| ----- | ------- | -------------------------------------------- |
| token | address | the address of token wich price is to return |

#### Returns

| Name          | Type    | Description |
| ------------- | ------- | ----------- |
| priceMantissa | uint256 | undefined   |
| priceDecimals | uint8   | undefined   |

### getPriceSigned

```solidity
function getPriceSigned(address token, uint256 _priceMantissa, uint8 _priceDecimals, uint256 validTo, bytes signature) external view returns (uint256 priceMantissa, uint8 priceDecimals)
```

*returns the price of token multiplied by 10 \*\* priceDecimals given by price provider. price can be calculated as priceMantissa / (10 \*\* priceDecimals) i.e. price = priceMantissa / (10 \*\* priceDecimals)*

#### Parameters

| Name            | Type    | Description                                                  |
| --------------- | ------- | ------------------------------------------------------------ |
| token           | address | the address of token                                         |
| \_priceMantissa | uint256 | - the price of token (used in verifying the signature)       |
| \_priceDecimals | uint8   | - the price decimals (used in verifying the signature)       |
| validTo         | uint256 | - the timestamp in seconds (used in verifying the signature) |
| signature       | bytes   | - the backend signature of secp256k1. length is 65 bytes     |

#### Returns

| Name          | Type    | Description |
| ------------- | ------- | ----------- |
| priceMantissa | uint256 | undefined   |
| priceDecimals | uint8   | undefined   |

### grandModerator

```solidity
function grandModerator(address newModerator) external nonpayable
```

#### Parameters

| Name         | Type    | Description |
| ------------ | ------- | ----------- |
| newModerator | address | undefined   |

### initialize

```solidity
function initialize() external nonpayable
```

### revokeModerator

```solidity
function revokeModerator(address moderator) external nonpayable
```

#### Parameters

| Name      | Type    | Description |
| --------- | ------- | ----------- |
| moderator | address | undefined   |

### setTokenAndPriceProvider

```solidity
function setTokenAndPriceProvider(address token, address priceProvider, bool hasFunctionWithSign) external nonpayable
```

#### Parameters

| Name                | Type    | Description |
| ------------------- | ------- | ----------- |
| token               | address | undefined   |
| priceProvider       | address | undefined   |
| hasFunctionWithSign | bool    | undefined   |

### tokenPriceProvider

```solidity
function tokenPriceProvider(address projectToken) external view returns (address priceProvider, bool hasSignedFunction)
```

#### Parameters

| Name         | Type    | Description |
| ------------ | ------- | ----------- |
| projectToken | address | undefined   |

#### Returns

| Name              | Type    | Description |
| ----------------- | ------- | ----------- |
| priceProvider     | address | undefined   |
| hasSignedFunction | bool    | undefined   |

### usdDecimals

```solidity
function usdDecimals() external view returns (uint8)
```

#### Returns

| Name | Type  | Description |
| ---- | ----- | ----------- |
| \_0  | uint8 | undefined   |

## Events

### ChangeActive

```solidity
event ChangeActive(address indexed who, address indexed priceProvider, address indexed token, bool active)
```

#### Parameters

| Name                    | Type    | Description |
| ----------------------- | ------- | ----------- |
| who `indexed`           | address | undefined   |
| priceProvider `indexed` | address | undefined   |
| token `indexed`         | address | undefined   |
| active                  | bool    | undefined   |

### GrandModeratorRole

```solidity
event GrandModeratorRole(address indexed who, address indexed newModerator)
```

#### Parameters

| Name                   | Type    | Description |
| ---------------------- | ------- | ----------- |
| who `indexed`          | address | undefined   |
| newModerator `indexed` | address | undefined   |

### RevokeModeratorRole

```solidity
event RevokeModeratorRole(address indexed who, address indexed moderator)
```

#### Parameters

| Name                | Type    | Description |
| ------------------- | ------- | ----------- |
| who `indexed`       | address | undefined   |
| moderator `indexed` | address | undefined   |

### SetTokenAndPriceProvider

```solidity
event SetTokenAndPriceProvider(address indexed who, address indexed token, address indexed priceProvider)
```

#### Parameters

| Name                    | Type    | Description |
| ----------------------- | ------- | ----------- |
| who `indexed`           | address | undefined   |
| token `indexed`         | address | undefined   |
| priceProvider `indexed` | address | undefined   |


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