From 497e5a9f0b184a952c30753dd3c36284fac4df19 Mon Sep 17 00:00:00 2001 From: pradyuman-verma Date: Sat, 19 Mar 2022 20:33:38 +0530 Subject: [PATCH 1/2] added FTM paraswap --- .../fantom/connectors/paraswap/events.sol | 11 +++ .../fantom/connectors/paraswap/helpers.sol | 70 +++++++++++++++++++ .../fantom/connectors/paraswap/interface.sol | 5 ++ contracts/fantom/connectors/paraswap/main.sol | 59 ++++++++++++++++ 4 files changed, 145 insertions(+) create mode 100644 contracts/fantom/connectors/paraswap/events.sol create mode 100644 contracts/fantom/connectors/paraswap/helpers.sol create mode 100644 contracts/fantom/connectors/paraswap/interface.sol create mode 100644 contracts/fantom/connectors/paraswap/main.sol diff --git a/contracts/fantom/connectors/paraswap/events.sol b/contracts/fantom/connectors/paraswap/events.sol new file mode 100644 index 00000000..ef39e00c --- /dev/null +++ b/contracts/fantom/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 + ); +} diff --git a/contracts/fantom/connectors/paraswap/helpers.sol b/contracts/fantom/connectors/paraswap/helpers.sol new file mode 100644 index 00000000..362d6f1a --- /dev/null +++ b/contracts/fantom/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 wftmAmt) + 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: wftmAmt }(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 ftmAmt; + + if (address(_sellAddr) == ftmAddr) { + ftmAmt = swapData._sellAmt; + } else { + address tokenProxy = AugustusSwapperInterface(paraswap) + .getTokenTransferProxy(); + approve(TokenInterface(_sellAddr), tokenProxy, swapData._sellAmt); + } + + swapData._buyAmt = _swapHelper(swapData, ftmAmt); + + setUint(setId, swapData._buyAmt); + + return swapData; + } +} diff --git a/contracts/fantom/connectors/paraswap/interface.sol b/contracts/fantom/connectors/paraswap/interface.sol new file mode 100644 index 00000000..813ea9aa --- /dev/null +++ b/contracts/fantom/connectors/paraswap/interface.sol @@ -0,0 +1,5 @@ +pragma solidity ^0.7.0; + +interface AugustusSwapperInterface { + function getTokenTransferProxy() external view returns (address); +} diff --git a/contracts/fantom/connectors/paraswap/main.sol b/contracts/fantom/connectors/paraswap/main.sol new file mode 100644 index 00000000..5603aa06 --- /dev/null +++ b/contracts/fantom/connectors/paraswap/main.sol @@ -0,0 +1,59 @@ +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 FTM/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 FTM: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) + * @param sellAddr The address of the token to sell.(For FTM: 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 ConnectV2ParaswapV5Fantom is ParaswapResolver { + string public name = "Paraswap-v5"; +} From 1444104893509f76aeca913eed564d5aed5ffffe Mon Sep 17 00:00:00 2001 From: pradyuman-verma Date: Sun, 20 Mar 2022 20:09:04 +0530 Subject: [PATCH 2/2] added fantom in deploy:runner --- scripts/deployment/deployConnectorsFromCmd.ts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scripts/deployment/deployConnectorsFromCmd.ts b/scripts/deployment/deployConnectorsFromCmd.ts index 9ed56c14..07661b65 100644 --- a/scripts/deployment/deployConnectorsFromCmd.ts +++ b/scripts/deployment/deployConnectorsFromCmd.ts @@ -24,7 +24,7 @@ async function deployRunner() { name: "chain", message: "What chain do you want to deploy on?", type: "list", - choices: ["mainnet", "polygon", "avalanche", "arbitrum", "optimism"] + choices: ["mainnet", "polygon", "avalanche", "arbitrum", "optimism", "fantom"] } ]);