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Merge pull request #261 from Instadapp/WSTETH-Connector

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Wsteth connector
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Thrilok kumar 2022-09-05 00:50:59 +05:30 committed by GitHub
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7
contracts/mainnet/connectors/wsteth/events.sol Normal file
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//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
contract Events {
event LogDeposit(uint256 stethAmt, uint256 wstethAmt, uint256 getId, uint256 setId);
event LogWithdraw(uint256 wstethAmt, uint256 stethAmt, uint256 getId, uint256 setId);
}

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contracts/mainnet/connectors/wsteth/helpers.sol Normal file
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//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import './interface.sol';
import { TokenInterface } from "../../common/interfaces.sol";
abstract contract Helpers {
IWSTETH internal constant wstethContract = IWSTETH(0x7f39C581F595B53c5cb19bD0b3f8dA6c935E2Ca0);
TokenInterface internal constant stethContract = TokenInterface(0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84);
}

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contracts/mainnet/connectors/wsteth/interface.sol Normal file
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//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
interface IWSTETH {
function balanceOf(address account) external view returns (uint256);
function wrap(uint256 _stETHAmount) external returns (uint256);
function unwrap(uint256 _wstETHAmount) external returns (uint256);
}

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contracts/mainnet/connectors/wsteth/main.sol Normal file
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//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import { Basic } from "../../common/basic.sol";
import './helpers.sol';
/**
* @title WSTETH.
* @dev Wrap and Unwrap STETH.
*/
abstract contract WSTETHContract is Helpers, Basic {
/**
* @dev Deposit STETH into WSTETH.
* @notice Wrap STETH into WSTETH
* @param stethAmt The amount of STETH to deposit. (For max: `uint256(-1)`)
* @param getId ID to retrieve STETH amount.
* @param setId ID stores the amount of WSTETH deposited.
*/
function deposit(
uint256 stethAmt,
uint256 getId,
uint256 setId
) external returns (string memory _eventName, bytes memory _eventParam) {
uint256 _amt = getUint(getId, stethAmt);
_amt = _amt == uint(-1) ? _amt = stethContract.balanceOf(address(this)) : _amt;
approve(stethContract, address(wstethContract), _amt);
uint256 _wstethAmt = wstethContract.wrap(_amt);
setUint(setId, _wstethAmt);
_eventName = "LogDeposit(uint256,uint256,uint256,uint256)";
_eventParam = abi.encode(_amt, _wstethAmt, getId, setId);
}
/**
* @dev Withdraw STETH from WSTETH from Smart Account
* @notice Unwrap STETH from WSTETH
* @param wstethAmt The amount of WSTETH to withdraw. (For max: `uint256(-1)`)
* @param getId ID to retrieve WSTETH amount.
* @param setId ID stores the amount of STETH.
*/
function withdraw(
uint256 wstethAmt,
uint256 getId,
uint256 setId
) external returns (string memory _eventName, bytes memory _eventParam) {
uint256 _amt = getUint(getId, wstethAmt);
_amt = _amt == uint(-1) ? wstethContract.balanceOf(address(this)) : _amt;
uint256 _stethAmt = wstethContract.unwrap(_amt);
setUint(setId, _stethAmt);
_eventName = "LogWithdraw(uint256,uint256,uint256,uint256)";
_eventParam = abi.encode(_amt, _stethAmt, getId, setId);
}
}
contract ConnectV2WSTETH is WSTETHContract {
string constant public name = "WSTETH-v1.0";
}