WETHGateway

WETHGateway

The WETH Gateway contract is a helper to easily wrap and unwrap ETH (or native currency of chain eg. MATIC, AVAX etc) as necessary when interacting with the protocol.

Write Methods

depositETH

function depositETH(address pool, address onBehalfOf, uint16 referralCode)

Supplies the msg.value amount of ETH (or native chain token) into the SparkLend pool, minting the same amount of corresponding aWETH and transferring them to the onBehalfOf address.

Ensure that the depositETH() transaction also includes the amount of ETH you are supplying in the msg.value.

Call Params

Name	Type	Description
pool	address	address of the targeted pool
onBehalfOf	address	address who will receive the aWETH. Use msg.sender when the spTokens should be sent to the caller.
referralCode	uint16	unique code for 3rd party referral program integration. 0 for no referra

withdrawETH

function withdrawETH(address pool, uint256 amount, address to)

Withdraws amount of the WETH (or wrapped native chain token), unwraps it and transfers ETH (or native chain token) to the to address.

💡 Ensure you set the relevant `spToken` allowance, before calling this function, so the `WETHGateway` contract can transfer the associated aWETH.

Call Params

Name	Type	Description
pool	address	address of the targeted pool
amount	uint256	amount to be withdrawn, expressed in wei units. Use type(uint).max to withdraw the entire balance.
to	address	address that will receive the unwrapped ETH

repayETH

function repayETH(address pool, uint256 amount, uint256 rateMode, address onBehalfOf)

Repays onBehalfOf's debt amount of ETH () which has a rateMode.

Ensure that the repayETH() transaction also includes the amount of ETH you are repaying in the msg.value.

Parameter Name	Type	Description
lendingPool	address	address of the targeted underlying lending pool
amount	uint256	amount to be borrowed, expressed in wei units. Use uint(-1) to repay the entire debt, ONLY when the repayment is not executed on behalf of a 3rd party. In case of repayments on behalf of another user, it's recommended to send an _amount slightly higher than the current borrowed amount.
rateMode	uint256	the type of borrow debt. Stable: 1, Variable: 2
onBehalfOf	address	address of user who will incur the debt. Use msg.sender when not calling on behalf of a different user.

borrowETH

function borrowETH(address pool, uint256 amount, uint256 interestRateMode, uint16 referralCode)

Borrows amount of WETH with interestRateMode, sending the amount of unwrapped WETH to msg.sender.

Call Params

Name	Type	Description
pool	address	address of the targeted pool
amount	uint256	amount to be borrowed, expressed in wei units
interestRateMode	uint256	the type of borrow debt. Stable: 1, Variable: 2
referralCode	uint16	unique code for 3rd party referral program integration. 0 for no referral code.

withdrawETHWithPermit

function withdrawETHWithPermit(address pool, uint256 amount, address to, uint256 deadline, uint8 permitV, bytes32 permitR, bytes32 permitS)

Withdraws amount of the WETH (or wrapped native chain token) without a separate approval tx. The ETH (or native chain token) is sent to the to address.

Call Params

Name	Type	Description
pool	address	address of the targeted pool
amount	uint256	amount of aWETH (or spToken corresponding to native token of chain) that will be burnt to withdraw ETH (or native chain token)
to	address	address that will receive the ETH (or native chain token)
deadline	uint256	unix timestamp till which the signature is valid
permitV	uint8	Signature parameter v
permitR	bytes32	Signature parameter r
permitS	bytes32	Signature parameter s

emergencyTokenTransfer

function emergencyTokenTransfer(address Token, address to, uint256 amount)

Method for ERC20 recovery in case of stuck tokens due direct transfers to the contract address.

Can be called only by the owner of the contract i.e. Maker Governance

emergencyEtherTransfer

function emergencyEtherTransfer(address to, uint256 amount)

Method for ETH (or native chain token) recovery in case of stuck ETH due selfdestruct or transfer ether to pre-computated contract address before deployment.

Can be called only by the owner of the contract i.e. Maker Governance.

View

getWETHAddress

function getWETHAddress()

Returns the WETH address used by the WETHGateway.

ABI

WETHGateway ABI

[
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "weth",
                "type": "address"
            },
            {
                "internalType": "address",
                "name": "owner",
                "type": "address"
            }
        ],
        "stateMutability": "nonpayable",
        "type": "constructor"
    },
    {
        "anonymous": false,
        "inputs": [
            {
                "indexed": true,
                "internalType": "address",
                "name": "previousOwner",
                "type": "address"
            },
            {
                "indexed": true,
                "internalType": "address",
                "name": "newOwner",
                "type": "address"
            }
        ],
        "name": "OwnershipTransferred",
        "type": "event"
    },
    {
        "stateMutability": "payable",
        "type": "fallback"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "pool",
                "type": "address"
            }
        ],
        "name": "authorizePool",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "pool",
                "type": "address"
            },
            {
                "internalType": "uint256",
                "name": "amount",
                "type": "uint256"
            },
            {
                "internalType": "uint256",
                "name": "interesRateMode",
                "type": "uint256"
            },
            {
                "internalType": "uint16",
                "name": "referralCode",
                "type": "uint16"
            }
        ],
        "name": "borrowETH",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "pool",
                "type": "address"
            },
            {
                "internalType": "address",
                "name": "onBehalfOf",
                "type": "address"
            },
            {
                "internalType": "uint16",
                "name": "referralCode",
                "type": "uint16"
            }
        ],
        "name": "depositETH",
        "outputs": [],
        "stateMutability": "payable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "to",
                "type": "address"
            },
            {
                "internalType": "uint256",
                "name": "amount",
                "type": "uint256"
            }
        ],
        "name": "emergencyEtherTransfer",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "token",
                "type": "address"
            },
            {
                "internalType": "address",
                "name": "to",
                "type": "address"
            },
            {
                "internalType": "uint256",
                "name": "amount",
                "type": "uint256"
            }
        ],
        "name": "emergencyTokenTransfer",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "getWETHAddress",
        "outputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "owner",
        "outputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [],
        "name": "renounceOwnership",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "pool",
                "type": "address"
            },
            {
                "internalType": "uint256",
                "name": "amount",
                "type": "uint256"
            },
            {
                "internalType": "uint256",
                "name": "rateMode",
                "type": "uint256"
            },
            {
                "internalType": "address",
                "name": "onBehalfOf",
                "type": "address"
            }
        ],
        "name": "repayETH",
        "outputs": [],
        "stateMutability": "payable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "newOwner",
                "type": "address"
            }
        ],
        "name": "transferOwnership",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "pool",
                "type": "address"
            },
            {
                "internalType": "uint256",
                "name": "amount",
                "type": "uint256"
            },
            {
                "internalType": "address",
                "name": "to",
                "type": "address"
            }
        ],
        "name": "withdrawETH",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "pool",
                "type": "address"
            },
            {
                "internalType": "uint256",
                "name": "amount",
                "type": "uint256"
            },
            {
                "internalType": "address",
                "name": "to",
                "type": "address"
            },
            {
                "internalType": "uint256",
                "name": "deadline",
                "type": "uint256"
            },
            {
                "internalType": "uint8",
                "name": "permitV",
                "type": "uint8"
            },
            {
                "internalType": "bytes32",
                "name": "permitR",
                "type": "bytes32"
            },
            {
                "internalType": "bytes32",
                "name": "permitS",
                "type": "bytes32"
            }
        ],
        "name": "withdrawETHWithPermit",
        "outputs": [],
        "stateMutability": "nonpayable",
        "type": "function"
    },
    {
        "stateMutability": "payable",
        "type": "receive"
    }
]