diff --git a/contracts/avalanche/connectors/paraswap/helpers.sol b/contracts/avalanche/connectors/paraswap/helpers.sol index ccee429b..861f3760 100644 --- a/contracts/avalanche/connectors/paraswap/helpers.sol +++ b/contracts/avalanche/connectors/paraswap/helpers.sol @@ -1,12 +1,11 @@ pragma solidity ^0.7.0; -import { DSMath } from "../../common/math.sol"; -import { Basic } from "../../common/basic.sol"; -import { TokenInterface } from "../../common/interfaces.sol"; -import { AugustusSwapperInterface } from "./interface.sol"; +import {DSMath} from "../../common/math.sol"; +import {Basic} from "../../common/basic.sol"; +import {TokenInterface} from "../../common/interfaces.sol"; +import {AugustusSwapperInterface} from "./interface.sol"; abstract contract Helpers is DSMath, Basic { - struct SwapData { TokenInterface sellToken; TokenInterface buyToken; @@ -16,17 +15,27 @@ abstract contract Helpers is DSMath, Basic { bytes callData; } - address internal constant paraswap = 0xDEF171Fe48CF0115B1d80b88dc8eAB59176FEe57; + address internal constant paraswap = + 0xDEF171Fe48CF0115B1d80b88dc8eAB59176FEe57; - function _swapHelper(SwapData memory swapData, uint256 wmaticAmt) internal returns (uint256 buyAmt) { + function _swapHelper(SwapData memory swapData, uint256 wavaxAmt) + internal + returns (uint256 buyAmt) + { TokenInterface buyToken = swapData.buyToken; - (uint256 _buyDec, uint256 _sellDec) = getTokensDec(buyToken, swapData.sellToken); + (uint256 _buyDec, uint256 _sellDec) = getTokensDec( + buyToken, + swapData.sellToken + ); uint256 _sellAmt18 = convertTo18(_sellDec, swapData._sellAmt); - uint256 _slippageAmt = convert18ToDec(_buyDec, wmul(swapData.unitAmt, _sellAmt18)); + uint256 _slippageAmt = convert18ToDec( + _buyDec, + wmul(swapData.unitAmt, _sellAmt18) + ); uint256 initalBal = getTokenBal(buyToken); - (bool success, ) = paraswap.call{value: wmaticAmt}(swapData.callData); + (bool success, ) = paraswap.call{value: wavaxAmt}(swapData.callData); if (!success) revert("paraswap-failed"); uint256 finalBal = getTokenBal(buyToken); @@ -36,22 +45,26 @@ abstract contract Helpers is DSMath, Basic { require(_slippageAmt <= buyAmt, "Too much slippage"); } - function _swap(SwapData memory swapData, uint256 setId) internal returns (SwapData memory) { + function _swap(SwapData memory swapData, uint256 setId) + internal + returns (SwapData memory) + { TokenInterface _sellAddr = swapData.sellToken; - uint256 maticAmt; + uint256 avaxAmt; if (address(_sellAddr) == avaxAddr) { - maticAmt = swapData._sellAmt; + avaxAmt = swapData._sellAmt; } else { - address tokenProxy = AugustusSwapperInterface(paraswap).getTokenTransferProxy(); + address tokenProxy = AugustusSwapperInterface(paraswap) + .getTokenTransferProxy(); approve(TokenInterface(_sellAddr), tokenProxy, swapData._sellAmt); } - swapData._buyAmt = _swapHelper(swapData, maticAmt); + swapData._buyAmt = _swapHelper(swapData, avaxAmt); setUint(setId, swapData._buyAmt); return swapData; } -} \ No newline at end of file +} diff --git a/contracts/mainnet/connectors/paraswap/events.sol b/contracts/mainnet/connectors/paraswap/events.sol new file mode 100644 index 00000000..0f9470dc --- /dev/null +++ b/contracts/mainnet/connectors/paraswap/events.sol @@ -0,0 +1,11 @@ +pragma solidity ^0.7.0; + +contract Events { + event LogSwap( + address buyToken, + address sellToken, + uint256 buyAmt, + uint256 sellAmt, + uint256 setId + ); +} \ No newline at end of file diff --git a/contracts/mainnet/connectors/paraswap/helpers.sol b/contracts/mainnet/connectors/paraswap/helpers.sol new file mode 100644 index 00000000..8f8e8d74 --- /dev/null +++ b/contracts/mainnet/connectors/paraswap/helpers.sol @@ -0,0 +1,70 @@ +pragma solidity ^0.7.0; + +import {DSMath} from "../../common/math.sol"; +import {Basic} from "../../common/basic.sol"; +import {TokenInterface} from "../../common/interfaces.sol"; +import {AugustusSwapperInterface} from "./interface.sol"; + +abstract contract Helpers is DSMath, Basic { + struct SwapData { + TokenInterface sellToken; + TokenInterface buyToken; + uint256 _sellAmt; + uint256 _buyAmt; + uint256 unitAmt; + bytes callData; + } + + address internal constant paraswap = + 0xDEF171Fe48CF0115B1d80b88dc8eAB59176FEe57; + + 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, ) = paraswap.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 { + address tokenProxy = AugustusSwapperInterface(paraswap) + .getTokenTransferProxy(); + approve(TokenInterface(_sellAddr), tokenProxy, swapData._sellAmt); + } + + swapData._buyAmt = _swapHelper(swapData, ethAmt); + + setUint(setId, swapData._buyAmt); + + return swapData; + } +} diff --git a/contracts/mainnet/connectors/paraswap/interface.sol b/contracts/mainnet/connectors/paraswap/interface.sol new file mode 100644 index 00000000..a63b4c77 --- /dev/null +++ b/contracts/mainnet/connectors/paraswap/interface.sol @@ -0,0 +1,5 @@ +pragma solidity ^0.7.0; + +interface AugustusSwapperInterface { + function getTokenTransferProxy() external view returns (address); +} \ No newline at end of file diff --git a/contracts/mainnet/connectors/paraswap/main.sol b/contracts/mainnet/connectors/paraswap/main.sol new file mode 100644 index 00000000..2041c11c --- /dev/null +++ b/contracts/mainnet/connectors/paraswap/main.sol @@ -0,0 +1,55 @@ +pragma solidity ^0.7.0; + +/** + * @title Paraswap. + * @dev DEX Aggregator. + */ + +import { TokenInterface } from "../../common/interfaces.sol"; +import { Stores } from "../../common/stores.sol"; +import { Helpers } from "./helpers.sol"; + +abstract 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 MATIC: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) + * @param sellAddr The address of the token to sell.(For MATIC: 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 ConnectV2Paraswap is ParaswapResolver { + string public name = "Paraswap-v1"; +} \ No newline at end of file