feat: paraswap v6.2

This commit is contained in:
Samarendra Gouda 2024-06-22 20:45:05 +05:30
parent 7d3c69dd0e
commit 891559c34b
2 changed files with 123 additions and 0 deletions

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//SPDX-License-Identifier: MIT
pragma solidity 0.8.19;
import {DSMath} from "../../common/math.sol";
import {Basic} from "../../common/basic.sol";
import {TokenInterface} from "../../common/interfaces.sol";
abstract contract Helpers is DSMath, Basic {
struct SwapData {
TokenInterface sellToken;
TokenInterface buyToken;
uint256 _sellAmt;
uint256 _buyAmt;
uint256 unitAmt;
bytes callData;
}
address internal constant AUGUSTUS_V6 =
0x6A000F20005980200259B80c5102003040001068;
function _swapHelper(
SwapData memory swapData,
uint256 wethAmt
) internal returns (uint256 buyAmt) {
TokenInterface buyToken = swapData.buyToken;
(uint256 _buyDec, uint256 _sellDec) = getTokensDec(
buyToken,
swapData.sellToken
);
uint256 _sellAmt18 = convertTo18(_sellDec, swapData._sellAmt);
uint256 _slippageAmt = convert18ToDec(
_buyDec,
wmul(swapData.unitAmt, _sellAmt18)
);
uint256 initalBal = getTokenBal(buyToken);
(bool success, ) = AUGUSTUS_V6.call{value: wethAmt}(swapData.callData);
if (!success) revert("paraswap-failed");
uint256 finalBal = getTokenBal(buyToken);
buyAmt = sub(finalBal, initalBal);
require(_slippageAmt <= buyAmt, "Too much slippage");
}
function _swap(
SwapData memory swapData,
uint256 setId
) internal returns (SwapData memory) {
TokenInterface _sellAddr = swapData.sellToken;
uint256 ethAmt;
if (address(_sellAddr) == ethAddr) {
ethAmt = swapData._sellAmt;
} else {
approve(TokenInterface(_sellAddr), AUGUSTUS_V6, swapData._sellAmt);
}
swapData._buyAmt = _swapHelper(swapData, ethAmt);
setUint(setId, swapData._buyAmt);
return swapData;
}
}

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//SPDX-License-Identifier: MIT
pragma solidity 0.8.19;
import {TokenInterface} from "../../common/interfaces.sol";
import {Stores} from "../../common/stores.sol";
import {Helpers} from "./helpers.sol";
contract ParaswapResolver is Helpers {
/**
* @dev Sell ETH/ERC20_Token using ParaSwap.
* @notice Swap tokens from exchanges like kyber, 0x etc, with calculation done off-chain.
* @param buyAddr The address of the token to buy.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param sellAddr The address of the token to sell.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param sellAmt The amount of the token to sell.
* @param unitAmt The amount of buyAmt/sellAmt with slippage.
* @param callData Data from paraswap API.
* @param setId ID stores the amount of token brought.
*/
function swap(
address buyAddr,
address sellAddr,
uint256 sellAmt,
uint256 unitAmt,
bytes calldata callData,
uint256 setId
)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
Helpers.SwapData memory swapData = Helpers.SwapData({
buyToken: TokenInterface(buyAddr),
sellToken: TokenInterface(sellAddr),
unitAmt: unitAmt,
callData: callData,
_sellAmt: sellAmt,
_buyAmt: 0
});
swapData = _swap(swapData, setId);
_eventName = "LogSwap(address,address,uint256,uint256,uint256)";
_eventParam = abi.encode(
address(swapData.buyToken),
address(swapData.sellToken),
swapData._buyAmt,
swapData._sellAmt,
setId
);
}
}
contract ConnectV2ParaswapV6 is ParaswapResolver {
string public name = "Paraswap-v6.2";
}