> For the complete documentation index, see [llms.txt](https://docs.fringe.fi/smart-contract-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fringe.fi/smart-contract-documentation/interest-rate-model/fringeinterestratemodel.md).

# Fringe Interest Rate Model

## Methods

### DEFAULT\_ADMIN\_ROLE

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

#### Returns

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

### MODERATOR\_ROLE

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

#### Returns

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

### borrowRate

```solidity
function borrowRate() external view returns (uint256)
```

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | uint256 | undefined   |

### getBorrowRate

```solidity
function getBorrowRate(uint256 cash, uint256 borrows, uint256 reserves) external view returns (uint256)
```

Calculates the current borrow rate per block

#### Parameters

| Name     | Type    | Description                          |
| -------- | ------- | ------------------------------------ |
| cash     | uint256 | The amount of cash in the market     |
| borrows  | uint256 | The amount of borrows in the market  |
| reserves | uint256 | The amount of reserves in the market |

#### Returns

| Name | Type    | Description                                                         |
| ---- | ------- | ------------------------------------------------------------------- |
| \_0  | uint256 | The borrow rate percentage per block as a mantissa (scaled by 1e18) |

### getRoleAdmin

```solidity
function getRoleAdmin(bytes32 role) external view returns (bytes32)
```

*Returns the admin role that controls `role`. See {grantRole} and {revokeRole}. To change a role's admin, use {\_setRoleAdmin}.*

#### Parameters

| Name | Type    | Description |
| ---- | ------- | ----------- |
| role | bytes32 | undefined   |

#### Returns

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

### getSupplyRate

```solidity
function getSupplyRate(uint256 cash, uint256 borrows, uint256 reserves, uint256 reserveFactorMantissa) external view returns (uint256)
```

Calculates the current supply interest rate per block

#### Parameters

| Name                  | Type    | Description                                            |
| --------------------- | ------- | ------------------------------------------------------ |
| cash                  | uint256 | The total amount of cash the market has                |
| borrows               | uint256 | The total amount of borrows the market has outstanding |
| reserves              | uint256 | The total amount of reserves the market has            |
| reserveFactorMantissa | uint256 | The current reserve factor the market has              |

#### Returns

| Name | Type    | Description                                                     |
| ---- | ------- | --------------------------------------------------------------- |
| \_0  | uint256 | The supply rate per block (as a percentage, and scaled by 1e18) |

### grandModerator

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

#### Parameters

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

### grantRole

```solidity
function grantRole(bytes32 role, address account) external nonpayable
```

*Grants `role` to `account`. If `account` had not been already granted `role`, emits a {RoleGranted} event. Requirements: - the caller must have `role`'s admin role.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| role    | bytes32 | undefined   |
| account | address | undefined   |

### hasRole

```solidity
function hasRole(bytes32 role, address account) external view returns (bool)
```

*Returns `true` if `account` has been granted `role`.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| role    | bytes32 | undefined   |
| account | address | undefined   |

#### Returns

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

### initialize

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

### isInterestRateModel

```solidity
function isInterestRateModel() external view returns (bool)
```

Indicator that this is an InterestRateModel contract (for inspection)

#### Returns

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

### renounceRole

```solidity
function renounceRole(bytes32 role, address account) external nonpayable
```

*Revokes `role` from the calling account. Roles are often managed via {grantRole} and {revokeRole}: this function's purpose is to provide a mechanism for accounts to lose their privileges if they are compromised (such as when a trusted device is misplaced). If the calling account had been granted `role`, emits a {RoleRevoked} event. Requirements: - the caller must be `account`.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| role    | bytes32 | undefined   |
| account | address | undefined   |

### revokeModerator

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

#### Parameters

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

### revokeRole

```solidity
function revokeRole(bytes32 role, address account) external nonpayable
```

*Revokes `role` from `account`. If `account` had been granted `role`, emits a {RoleRevoked} event. Requirements: - the caller must have `role`'s admin role.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| role    | bytes32 | undefined   |
| account | address | undefined   |

### setBorrowRate

```solidity
function setBorrowRate(uint256 newBorrowRate) external nonpayable
```

#### Parameters

| Name          | Type    | Description |
| ------------- | ------- | ----------- |
| newBorrowRate | uint256 | undefined   |

### setSupplyRate

```solidity
function setSupplyRate(uint256 newSupplyRate) external nonpayable
```

#### Parameters

| Name          | Type    | Description |
| ------------- | ------- | ----------- |
| newSupplyRate | uint256 | undefined   |

### supplyRate

```solidity
function supplyRate() external view returns (uint256)
```

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | uint256 | undefined   |

### supportsInterface

```solidity
function supportsInterface(bytes4 interfaceId) external view returns (bool)
```

*See {IERC165-supportsInterface}.*

#### Parameters

| Name        | Type   | Description |
| ----------- | ------ | ----------- |
| interfaceId | bytes4 | undefined   |

#### Returns

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

## Events

### RoleAdminChanged

```solidity
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole)
```

#### Parameters

| Name                        | Type    | Description |
| --------------------------- | ------- | ----------- |
| role `indexed`              | bytes32 | undefined   |
| previousAdminRole `indexed` | bytes32 | undefined   |
| newAdminRole `indexed`      | bytes32 | undefined   |

### RoleGranted

```solidity
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender)
```

#### Parameters

| Name              | Type    | Description |
| ----------------- | ------- | ----------- |
| role `indexed`    | bytes32 | undefined   |
| account `indexed` | address | undefined   |
| sender `indexed`  | address | undefined   |

### RoleRevoked

```solidity
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender)
```

#### Parameters

| Name              | Type    | Description |
| ----------------- | ------- | ----------- |
| role `indexed`    | bytes32 | undefined   |
| account `indexed` | address | undefined   |
| sender `indexed`  | address | undefined   |