文章目录

• 基于DYDX闪电贷在Cofix和Uniswap之间套利
• • 相关项目
  • • Cofix
    • Uniswap
    • NEST
  • 流程
  • 套利合约
  • • 核心方法
    • • 1.WETH兑换成ETH
      • 2.ETH 在Cofix中兑换成USDT
      • 3.USDT 在Uniswap中兑换成ETH
      • 4.ETH兑换成WETH
  • 注意事项

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 //  实现操作function callFunction(address sender,Account.Info memory account,bytes memory data) public {MyCustomData memory mcd = abi.decode(data, (MyCustomData));uint256 tokenBalanceBefore = IERC20(mcd.token).balanceOf(address(this));// money// WETH->ETHWETH9(WETHAddress).withdraw(tokenBalanceBefore);// ETH->USDTuint256 loopTimes = address(this).balance.div(cofixETHSapn);for(uint256 i = 0; i < loopTimes; i++) {CoFiXRouter(cofixRouter).swapExactETHForTokens{value:cofixETHSapn}(USDTAddress,cofixETHSapn.sub(nestPrice),1,address(this), address(this), uint256(block.timestamp).add(100));}// USDT->ETHuint256 usdtBalance = IERC20(USDTAddress).balanceOf(address(this));address[] memory uniData = new address[](2);uniData[0] = address(0xdAC17F958D2ee523a2206206994597C13D831ec7);uniData[1] = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);UniswapV2Router(uniRouter).swapExactTokensForETH(usdtBalance,1,uniData,address(this),uint256(block.timestamp).add(100));// ETH->WETHWETH9(WETHAddress).deposit{value:tokenBalanceBefore.add(2)};uint256 balOfLoanedToken = IERC20(mcd.token).balanceOf(address(this));require(balOfLoanedToken >= mcd.repayAmount,"Not enough funds to repay dydx loan!");}

 WETH9(WETHAddress).withdraw(tokenBalanceBefore);

 uint256 loopTimes = address(this).balance.div(cofixETHSapn);for(uint256 i = 0; i < loopTimes; i++) {CoFiXRouter(cofixRouter).swapExactETHForTokens{value:cofixETHSapn}(USDTAddress,cofixETHSapn.sub(nestPrice),1,address(this), address(this), uint256(block.timestamp).add(100));}

 uint256 usdtBalance = IERC20(USDTAddress).balanceOf(address(this));address[] memory uniData = new address[](2);uniData[0] = address(0xdAC17F958D2ee523a2206206994597C13D831ec7);uniData[1] = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);UniswapV2Router(uniRouter).swapExactTokensForETH(usdtBalance,1,uniData,address(this),uint256(block.timestamp).add(100));

WETH9(WETHAddress).deposit{value:tokenBalanceBefore.add(2)};

 function initiateFlashLoan(uint256 _amount)external{ISoloMargin solo = ISoloMargin(dydxAddress);uint256 marketId = _getMarketIdFromTokenAddress(dydxAddress, WETHAddress);uint256 repayAmount = _getRepaymentAmountInternal(_amount);IERC20(WETHAddress).approve(dydxAddress, repayAmount);Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3);operations[0] = _getWithdrawAction(marketId, _amount);operations[1] = _getCallAction(abi.encode(MyCustomData({token: WETHAddress, repayAmount: repayAmount})));operations[2] = _getDepositAction(marketId, repayAmount);Account.Info[] memory accountInfos = new Account.Info[](1);accountInfos[0] = _getAccountInfo();solo.operate(accountInfos, operations);}