# LendingPool

INIT lending pool contract.

## View Functions

### core

InitCore contract address.

```solidity
function core() external view returns (address initCore);
```

### underlyingToken

Underlying token of the lending pool.

```solidity
function underlyingToken() external view returns (address underlyingToken);
```

### cash

Current liquidity available for borrow.

```solidity
function cash() external view returns (uint256 amt);
```

### totalDebt

Last stored total borrowed amount of underlying token amount, including borrow interest.

```solidity
function totalDebt() external view returns (uint256 totalDebt);
```

### totalDebtShares

Last stored total debt shares.

```solidity
function totalDebtShares() external view returns (uint256 totalDebtShares);
```

### irm

Interest rate model contract address of lending pool.

```solidity
function irm() external view returns (address interestRateModel);
```

### lastAccruedTime

Last stored timestamp that accrue borrow interest.

```solidity
function lastAccruedTime() external view returns (uint256 lastAccruedTimestamp);
```

### reserveFactor\_e18

Reserve factor in `10^18` precision.

```solidity
function reserveFactor_e18() external view returns (uint256 factor);
```

### treasury

INIT treasury contract address.

```solidity
function treasury() external view returns (address treasury);
```

### decimals

inToken decimal (currently equals to`8 + underlyingToken.decimals()`).

```solidity
function decimals() external view returns (uint256 decimal);
```

### debtAmtToShareStored

Convert debt amount to debt shares (rounded up) without interest accrual. For interest accrual, use [debtAmtToShareCurrent](#debtamttosharecurrent).

```solidity
function debtAmtToShareStored(uint _amt) external view returns (uint shares);
```

### debtShareToAmtStored

Convert debt amount to debt shares (rounded up) without interest accrual. For interest accrual, use [debtShareToAmtCurrent](#debtsharetoamtcurrent).

```solidity
function debtShareToAmtStored(uint _shares) external view returns (uint amt);
```

### toShares

Convert the underlying token amount to inToken amount (rounded down) without interest accrual. For interest accrual, use [toShareCurrent](#tosharecurrent).

```solidity
function toShares(uint _amt) external view returns (uint shares);
```

### toAmt

Convert inToken amount to underlying token amount (rounded down) without interest accrual. For interest accrual, use [toAmtCurrent](#toamtcurrent).

```solidity
function toAmt(uint _shares) external view returns (uint amt);
```

### getBorrowRate\_e18

Get current borrow interest in `10^18` precision.

```solidity
function getBorrowRate_e18() external view returns (uint borrowRate_e18);
```

### getSupplyRate\_e18

Get current supply interest in `10^18` precision.

```solidity
function getSupplyRate_e18() external view returns (uint supplyRate_e18);
```

### totalAsset

Get the total underlying token amount lent into the lending pool, including borrow interest since last accrued timestamp.

```solidity
function totalAssets() external view returns (uint totalAsset);
```

## External Functions

### accrueInterest

Accrue borrow interest and update last accrued timestamp.

```solidity
function accrueInterest() external;
```

### debtAmtToShareCurrent

Accrue interest and convert debt amount to debt shares (rounded up).

```solidity
function debtAmtToShareCurrent(uint256 _amt) external returns (shares);
```

Parameters:

| Name   | Type      | Description                           |
| ------ | --------- | ------------------------------------- |
| `_amt` | `uint256` | debt amount to convert to debt shares |

Returns:

| Name     | Type      | Description                                     |
| -------- | --------- | ----------------------------------------------- |
| `shares` | `uint256` | corresponding debt shares after accrue interest |

### debtShareToAmtCurrent

Accrue interest and convert debt shares to debt amount (rounded up).

```solidity
function debtShareToAmtCurrent(uint _shares) external returns (uint amt);
```

Parameters:

| Name      | Type      | Description                           |
| --------- | --------- | ------------------------------------- |
| `_shares` | `uint256` | debt shares to convert to debt amount |

Returns:

| Name  | Type      | Description                                     |
| ----- | --------- | ----------------------------------------------- |
| `amt` | `uint256` | corresponding debt amount after accrue interest |

### toSharesCurrent

Accrue borrow interest and convert the underlying token amount to inToken amount (rounded down).

{% hint style="warning" %}
This is not a view function.
{% endhint %}

```solidity
function toSharesCurrent(uint _amt) external returns (uint shares);
```

Parameters:

| Name   | Type      | Description                        |
| ------ | --------- | ---------------------------------- |
| `_amt` | `uint256` | underlying token amount to convert |

Returns:

| Name     | Type      | Description                                        |
| -------- | --------- | -------------------------------------------------- |
| `shares` | `uint256` | corresponding inToken amount after accrue interest |

### toAmtCurrent

Accrue borrow interest and convert the inToken amount to the underlying token amount (rounded down).

{% hint style="warning" %}
This is not a view function.
{% endhint %}

```solidity
function toAmtCurrent(uint _shares) external returns (uint amt);
```

Parameters:

| Name      | Type      | Description               |
| --------- | --------- | ------------------------- |
| `_shares` | `uint256` | inToken amount to convert |

Returns:

| Name  | Type      | Description                                                 |
| ----- | --------- | ----------------------------------------------------------- |
| `amt` | `uint256` | corresponding underlying token amount after accrue interest |


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