WETH Gateway
If you need to use native ETH (MATIC / AVAX in case of side chain market) in the protocol, it must first be wrapped into WETH (or WMATIC / WAVAX). The WETH Gateway contract is a helper contract to easily wrap and unwrap ETH (or MATIC / AVAX) as necessary when interacting with the protocol, since only ERC20 is used within protocol interactions.
The source code can be found here, with the latest deployed address listed in the Deployed Contracts.
function depositETH(address lendingPool, address onBehalfOf, uint16 referralCode)Deposits the
msg.value amount of ETH into the protocol, minting the same amount of corresponding aWETH, and transferring them to the onBehalfOf address.For
referralCode input explanations, please refer to the referral program section of the documentation. During testing, you can use the referral code: 0.Ensure that the
depositETH() transaction also includes the amount of ETH you are depositing in the msg.value.Parameter Name | Type | Description |
|---|---|---|
lendingPool | address | address of the targeted underlying lending pool |
onBehalfOf | address | address whom will receive the aWETH.
Use msg.sender when the aTokens should be sent to the caller. |
referralCode | uint16 |
function withdrawETH(address lendingPool, uint256 amount, address to)Withdraws
amount of the WETH, unwraps it to ETH, and transfers the ETH to the to address.Ensure you set the relevant ERC20 allowance of aWETH, before calling this function, so the
WETHGateway contract can burn the associated aWETH.Parameter Name | Type | Description |
|---|---|---|
lendingPool | address | address of the targeted underlying lending pool |
amount | uint256 | amount deposited, expressed in wei units.
Use type(uint).max to withdraw the entire balance. |
to | address | address that will receive the unwrapped ETH |
function repayETH(address lendingPool, 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. |
function borrowETH(address lendingPool, uint256 amount, uint256 interestRateMode, uint16 referralCode)Borrows
amount of WETH with interestRateMode, sending the amount of unwrapped WETH to msg.sender.Parameter Name | Type | Description |
|---|---|---|
lendingPool | address | address of the targeted underlying lending pool |
amount | uint256 | amount to be borrowed, expressed in wei units |
interestRateMode | uint256 | the type of borrow debt. Stable: 1, Variable: 2 |
referralCode | uint16 |
function getWETHAddress()Returns the WETH address used by the WETHGateway.
[
{
"inputs": [
{
"internalType": "address",
"name": "weth",
"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": "lendingPool",
"type": "address"
}
],
"name": "authorizeLendingPool",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "lendingPool",
"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": "lendingPool",
"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": "lendingPool",
"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": "lendingPool",
"type": "address"
},
{
"internalType": "uint256",
"name": "amount",
"type": "uint256"
},
{
"internalType": "address",
"name": "to",
"type": "address"
}
],
"name": "withdrawETH",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"stateMutability": "payable",
"type": "receive"
}
]
Last modified 4mo ago