WETHGateway
Inherits: IWETHGateway
Author: Morpho Labs
A contract allowing to wrap and unwrap ETH when interacting with Morpho.
State Variables
_WETH
The address of the WETH contract.
address internal constant _WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
_MORPHO_DAO
The address of the Morpho DAO.
address internal constant _MORPHO_DAO = 0xcBa28b38103307Ec8dA98377ffF9816C164f9AFa;
_MORPHO
The address of the Morpho protocol.
IMorpho internal immutable _MORPHO;
Functions
constructor
Contract constructor.
constructor(address morpho);
Parameters
| Name | Type | Description |
|---|---|---|
morpho | address | The address of the Morpho protocol. |
WETH
Returns the address of the WETH contract.
function WETH() external pure returns (address);
MORPHO
Returns the address of the Morpho protocol.
function MORPHO() external view returns (address);
MORPHO_DAO
Returns the address of the Morpho DAO.
function MORPHO_DAO() external pure returns (address);
skim
Transfers this contract's given ERC20 balance to the Morpho DAO, to avoid having funds stuck.
function skim(address underlying) external;
supplyETH
Wraps msg.value ETH in WETH and supplies them to Morpho on behalf of onBehalf.
function supplyETH(address onBehalf, uint256 maxIterations) external payable returns (uint256);
Returns
| Name | Type | Description |
|---|---|---|
<none> | uint256 | The actual amount supplied (in wei). |
supplyCollateralETH
Wraps msg.value ETH in WETH and supplies them as collateral to Morpho on behalf of onBehalf.
function supplyCollateralETH(address onBehalf) external payable returns (uint256);
Returns
| Name | Type | Description |
|---|---|---|
<none> | uint256 | The actual amount supplied as collateral (in wei). |
borrowETH
Borrows WETH on behalf of msg.sender, unwraps the ETH and sends them to receiver.
Note: msg.sender must have approved this contract to be its manager.
function borrowETH(uint256 amount, address receiver, uint256 maxIterations) external returns (uint256 borrowed);
Returns
| Name | Type | Description |
|---|---|---|
borrowed | uint256 | The actual amount borrowed (in wei). |
repayETH
Wraps msg.value ETH in WETH and repays onBehalf's debt on Morpho.
function repayETH(address onBehalf) external payable returns (uint256 repaid);
Returns
| Name | Type | Description |
|---|---|---|
repaid | uint256 | The actual amount repaid (in wei). |
withdrawETH
Withdraws WETH up to amount on behalf of msg.sender, unwraps it to WETH and sends it to receiver.
Note: msg.sender must have approved this contract to be its manager.
function withdrawETH(uint256 amount, address receiver, uint256 maxIterations) external returns (uint256 withdrawn);
Returns
| Name | Type | Description |
|---|---|---|
withdrawn | uint256 | The actual amount withdrawn (in wei). |
withdrawCollateralETH
Withdraws WETH as collateral up to amount on behalf of msg.sender, unwraps it to WETH and sends it to receiver.
Note: msg.sender must have approved this contract to be its manager.
function withdrawCollateralETH(uint256 amount, address receiver) external returns (uint256 withdrawn);
Returns
| Name | Type | Description |
|---|---|---|
withdrawn | uint256 | The actual collateral amount withdrawn (in wei). |
receive
Only the WETH contract is allowed to transfer ETH to this contracts.
receive() external payable;
_wrapETH
Wraps amount of ETH to WETH.
function _wrapETH(uint256 amount) internal;
_unwrapAndTransferETH
Unwraps amount of WETH to ETH and transfers it to receiver.
function _unwrapAndTransferETH(uint256 amount, address receiver) internal;
Errors
OnlyWETH
Thrown when another address than WETH sends ETH to the contract.
error OnlyWETH();
AddressIsZero
Thrown when the morpho address passed in the constructor is zero.
error AddressIsZero();
AmountIsZero
Thrown when the amount used is zero.
error AmountIsZero();