# GasFeePricing

## Methods

### decodeOptions

```solidity
function decodeOptions(bytes _options) external pure returns (uint16, uint256, uint256, bytes32)
```

#### Parameters

| Name      | Type  | Description |
| --------- | ----- | ----------- |
| \_options | bytes | undefined   |

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | uint16  | undefined   |
| \_1  | uint256 | undefined   |
| \_2  | uint256 | undefined   |
| \_3  | bytes32 | undefined   |

### dstGasPriceInWei

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

#### Parameters

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

#### Returns

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

### dstGasTokenRatio

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

#### Parameters

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

#### Returns

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

### encodeOptions

```solidity
function encodeOptions(uint16 txType, uint256 gasLimit) external pure returns (bytes)
```

#### Parameters

| Name     | Type    | Description |
| -------- | ------- | ----------- |
| txType   | uint16  | undefined   |
| gasLimit | uint256 | undefined   |

#### Returns

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

### encodeOptions

```solidity
function encodeOptions(uint16 txType, uint256 gasLimit, uint256 dstNativeAmt, bytes32 dstAddress) external pure returns (bytes)
```

#### Parameters

| Name         | Type    | Description |
| ------------ | ------- | ----------- |
| txType       | uint16  | undefined   |
| gasLimit     | uint256 | undefined   |
| dstNativeAmt | uint256 | undefined   |
| dstAddress   | bytes32 | undefined   |

#### Returns

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

### estimateGasFee

```solidity
function estimateGasFee(uint256 _dstChainId, bytes _options) external view returns (uint256)
```

Returns srcGasToken fee to charge in wei for the cross-chain message based on the gas limit

#### Parameters

| Name         | Type    | Description                                                                                                                |
| ------------ | ------- | -------------------------------------------------------------------------------------------------------------------------- |
| \_dstChainId | uint256 | undefined                                                                                                                  |
| \_options    | bytes   | Versioned struct used to instruct relayer on how to proceed with gas limits. Contains data on gas limit to submit tx with. |

#### Returns

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

### owner

```solidity
function owner() external view returns (address)
```

*Returns the address of the current owner.*

#### Returns

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

### renounceOwnership

```solidity
function renounceOwnership() external nonpayable
```

*Leaves the contract without owner. It will not be possible to call `onlyOwner` functions anymore. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby removing any functionality that is only available to the owner.*

### setCostPerChain

```solidity
function setCostPerChain(uint256 _dstChainId, uint256 _gasUnitPrice, uint256 _gasTokenPriceRatio) external nonpayable
```

Permissioned method to allow an off-chain party to set what each dstChain's gas cost is priced in the srcChain's native gas currency. Example: call on ETH, setCostPerChain(43114, 30000000000, 25180000000000000) chain ID 43114 Average of 30 gwei cost to transaction on 43114 AVAX/ETH = 0.02518, scaled to gas in wei = 25180000000000000

#### Parameters

| Name                 | Type    | Description                                                                               |
| -------------------- | ------- | ----------------------------------------------------------------------------------------- |
| \_dstChainId         | uint256 | The destination chain ID - typically, standard EVM chain ID, but differs on nonEVM chains |
| \_gasUnitPrice       | uint256 | The estimated current gas price in wei of the destination chain                           |
| \_gasTokenPriceRatio | uint256 | USD gas ratio of dstGasToken / srcGasToken                                                |

### transferOwnership

```solidity
function transferOwnership(address newOwner) external nonpayable
```

*Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner.*

#### Parameters

| Name     | Type    | Description |
| -------- | ------- | ----------- |
| newOwner | address | undefined   |

## Events

### OwnershipTransferred

```solidity
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner)
```

#### Parameters

| Name                    | Type    | Description |
| ----------------------- | ------- | ----------- |
| previousOwner `indexed` | address | undefined   |
| newOwner `indexed`      | address | undefined   |


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