> For the complete documentation index, see [llms.txt](https://docs.essencefinance.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.essencefinance.io/development/smart-contracts/peg/fixedpricepsm.md).

# FixedPricePSM

## Functions

### constructor

```solidity
function constructor(
    uint256 _floor,
    uint256 _ceiling,
    struct PegStabilityModule.OracleParams _params,
    uint256 _mintFeeBasisPoints,
    uint256 _redeemFeeBasisPoints,
    uint256 _reservesThreshold,
    uint256 _chiLimitPerSecond,
    uint256 _mintingBufferCap,
    contract IERC20 _underlyingToken,
    contract IPCVDeposit _surplusTarget
) public
```

#### Parameters

| Name                    | Type                                   | Description |
| ----------------------- | -------------------------------------- | ----------- |
| `_floor`                | uint256                                |             |
| `_ceiling`              | uint256                                |             |
| `_params`               | struct PegStabilityModule.OracleParams |             |
| `_mintFeeBasisPoints`   | uint256                                |             |
| `_redeemFeeBasisPoints` | uint256                                |             |
| `_reservesThreshold`    | uint256                                |             |
| `_chiLimitPerSecond`    | uint256                                |             |
| `_mintingBufferCap`     | uint256                                |             |
| `_underlyingToken`      | contract IERC20                        |             |
| `_surplusTarget`        | contract IPCVDeposit                   |             |

### \_getMintAmountOut

```solidity
function _getMintAmountOut(
    uint256 amountIn
) internal returns (uint256 amountChiOut)
```

helper function to get mint amount out based on current market prices

will revert if price is outside of bounds and bounded PSM is being used

#### Parameters

| Name       | Type    | Description |
| ---------- | ------- | ----------- |
| `amountIn` | uint256 |             |

### \_getRedeemAmountOut

```solidity
function _getRedeemAmountOut(
    uint256 amountChiIn
) internal returns (uint256 amountTokenOut)
```

helper function to get redeem amount out based on current market prices

will revert if price is outside of bounds and bounded PSM is being used

#### Parameters

| Name          | Type    | Description |
| ------------- | ------- | ----------- |
| `amountChiIn` | uint256 |             |


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