| // This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023. | |
| //SPDX-License-Identifier: MIT | |
| pragma solidity 0.6.12; | |
| pragma experimental ABIEncoderV2; | |
| /** | |
| Mainnet instances: | |
| - Uniswap V2 Router: 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D | |
| - Sushiswap V1 Router: 0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F | |
| - Shibaswap V1 Router: 0x03f7724180AA6b939894B5Ca4314783B0b36b329 | |
| - UNI: 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984 // exists on Sushi | |
| - USDT: 0xdAC17F958D2ee523a2206206994597C13D831ec7 | |
| - DAI: 0x6B175474E89094C44Da98b954EedeAC495271d0F // Triangular 1000000000 | |
| - WETH: 0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6 // Simple 10000000000000 | |
| - Aave LendingPoolAddressesProvider(Mainnet):0xB53C1a33016B2DC2fF3653530bfF1848a515c8c5 | |
| */ | |
| /** | |
| Goerli instances: | |
| - Uniswap V2 Router: 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D | |
| - Sushiswap V1 Router: 0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506 | |
| - Shibaswap V1 Router: 0x03f7724180AA6b939894B5Ca4314783B0b36b329 | |
| - UNI: 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984 // exists on Sushi | |
| - USDT: 0xaa34a2eE8Be136f0eeD223C9Ec8D4F2d0BC472dd | |
| - DAI: 0xdc31Ee1784292379Fbb2964b3B9C4124D8F89C60 // Triangular 1000000000 | |
| - WETH: 0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6 // Simple 10000000000000 | |
| - Aave LendingPoolAddressesProvider(kovan): 0x5E52dEc931FFb32f609681B8438A51c675cc232d | |
| */ | |
| /** | |
| Kovan instances: | |
| - Uniswap V2 Router: 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D | |
| - Sushiswap V1 Router: 0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506 | |
| - UNI: 0x075A36BA8846C6B6F53644fDd3bf17E5151789DC // exists on Sushi | |
| - USDT: 0x13512979ADE267AB5100878E2e0f485B568328a4 | |
| - BUSD: 0x4c6E1EFC12FDfD568186b7BAEc0A43fFfb4bCcCf | |
| - DAI: 0xFf795577d9AC8bD7D90Ee22b6C1703490b6512FD // Triangular 1000000000 | |
| - WETH: 0xd0A1E359811322d97991E03f863a0C30C2cF029C // Simple 10000000000000 | |
| - Aave LendingPoolAddressesProvider(kovan): 0x88757f2f99175387aB4C6a4b3067c77A695b0349 | |
| */ | |
| // File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol | |
| interface IUniswapV2Router01 { | |
| function factory() external pure returns (address); | |
| function WETH() external pure returns (address); | |
| function addLiquidity( | |
| address tokenA, | |
| address tokenB, | |
| uint amountADesired, | |
| uint amountBDesired, | |
| uint amountAMin, | |
| uint amountBMin, | |
| address to, | |
| uint deadline | |
| ) external returns (uint amountA, uint amountB, uint liquidity); | |
| function addLiquidityETH( | |
| address token, | |
| uint amountTokenDesired, | |
| uint amountTokenMin, | |
| uint amountETHMin, | |
| address to, | |
| uint deadline | |
| ) external payable returns (uint amountToken, uint amountETH, uint liquidity); | |
| function removeLiquidity( | |
| address tokenA, | |
| address tokenB, | |
| uint liquidity, | |
| uint amountAMin, | |
| uint amountBMin, | |
| address to, | |
| uint deadline | |
| ) external returns (uint amountA, uint amountB); | |
| function removeLiquidityETH( | |
| address token, | |
| uint liquidity, | |
| uint amountTokenMin, | |
| uint amountETHMin, | |
| address to, | |
| uint deadline | |
| ) external returns (uint amountToken, uint amountETH); | |
| function removeLiquidityWithPermit( | |
| address tokenA, | |
| address tokenB, | |
| uint liquidity, | |
| uint amountAMin, | |
| uint amountBMin, | |
| address to, | |
| uint deadline, | |
| bool approveMax, uint8 v, bytes32 r, bytes32 s | |
| ) external returns (uint amountA, uint amountB); | |
| function removeLiquidityETHWithPermit( | |
| address token, | |
| uint liquidity, | |
| uint amountTokenMin, | |
| uint amountETHMin, | |
| address to, | |
| uint deadline, | |
| bool approveMax, uint8 v, bytes32 r, bytes32 s | |
| ) external returns (uint amountToken, uint amountETH); | |
| function swapExactTokensForTokens( | |
| uint amountIn, | |
| uint amountOutMin, | |
| address[] calldata path, | |
| address to, | |
| uint deadline | |
| ) external returns (uint[] memory amounts); | |
| function swapTokensForExactTokens( | |
| uint amountOut, | |
| uint amountInMax, | |
| address[] calldata path, | |
| address to, | |
| uint deadline | |
| ) external returns (uint[] memory amounts); | |
| function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) | |
| external | |
| payable | |
| returns (uint[] memory amounts); | |
| function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) | |
| external | |
| returns (uint[] memory amounts); | |
| function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) | |
| external | |
| returns (uint[] memory amounts); | |
| function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) | |
| external | |
| payable | |
| returns (uint[] memory amounts); | |
| function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); | |
| function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); | |
| function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); | |
| function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); | |
| function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); | |
| } | |
| // File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol | |
| interface IUniswapV2Router02 is IUniswapV2Router01 { | |
| function removeLiquidityETHSupportingFeeOnTransferTokens( | |
| address token, | |
| uint liquidity, | |
| uint amountTokenMin, | |
| uint amountETHMin, | |
| address to, | |
| uint deadline | |
| ) external returns (uint amountETH); | |
| function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( | |
| address token, | |
| uint liquidity, | |
| uint amountTokenMin, | |
| uint amountETHMin, | |
| address to, | |
| uint deadline, | |
| bool approveMax, uint8 v, bytes32 r, bytes32 s | |
| ) external returns (uint amountETH); | |
| function swapExactTokensForTokensSupportingFeeOnTransferTokens( | |
| uint amountIn, | |
| uint amountOutMin, | |
| address[] calldata path, | |
| address to, | |
| uint deadline | |
| ) external; | |
| function swapExactETHForTokensSupportingFeeOnTransferTokens( | |
| uint amountOutMin, | |
| address[] calldata path, | |
| address to, | |
| uint deadline | |
| ) external payable; | |
| function swapExactTokensForETHSupportingFeeOnTransferTokens( | |
| uint amountIn, | |
| uint amountOutMin, | |
| address[] calldata path, | |
| address to, | |
| uint deadline | |
| ) external; | |
| } | |
| // File: https://github.com/aave/protocol-v2/blob/master/contracts/protocol/libraries/types/DataTypes.sol | |
| library DataTypes { | |
| // refer to the whitepaper, section 1.1 basic concepts for a formal description of these properties. | |
| struct ReserveData { | |
| //stores the reserve configuration | |
| ReserveConfigurationMap configuration; | |
| //the liquidity index. Expressed in ray | |
| uint128 liquidityIndex; | |
| //variable borrow index. Expressed in ray | |
| uint128 variableBorrowIndex; | |
| //the current supply rate. Expressed in ray | |
| uint128 currentLiquidityRate; | |
| //the current variable borrow rate. Expressed in ray | |
| uint128 currentVariableBorrowRate; | |
| //the current stable borrow rate. Expressed in ray | |
| uint128 currentStableBorrowRate; | |
| uint40 lastUpdateTimestamp; | |
| //tokens addresses | |
| address aTokenAddress; | |
| address stableDebtTokenAddress; | |
| address variableDebtTokenAddress; | |
| //address of the interest rate strategy | |
| address interestRateStrategyAddress; | |
| //the id of the reserve. Represents the position in the list of the active reserves | |
| uint8 id; | |
| } | |
| struct ReserveConfigurationMap { | |
| //bit 0-15: LTV | |
| //bit 16-31: Liq. threshold | |
| //bit 32-47: Liq. bonus | |
| //bit 48-55: Decimals | |
| //bit 56: Reserve is active | |
| //bit 57: reserve is frozen | |
| //bit 58: borrowing is enabled | |
| //bit 59: stable rate borrowing enabled | |
| //bit 60-63: reserved | |
| //bit 64-79: reserve factor | |
| uint256 data; | |
| } | |
| struct UserConfigurationMap { | |
| uint256 data; | |
| } | |
| enum InterestRateMode {NONE, STABLE, VARIABLE} | |
| } | |
| // File: https://github.com/aave/protocol-v2/blob/master/contracts/interfaces/ILendingPoolAddressesProvider.sol | |
| /** | |
| * @title LendingPoolAddressesProvider contract | |
| * @dev Main registry of addresses part of or connected to the protocol, including permissioned roles | |
| * - Acting also as factory of proxies and admin of those, so with right to change its implementations | |
| * - Owned by the Aave Governance | |
| * @author Aave | |
| **/ | |
| interface ILendingPoolAddressesProvider { | |
| event MarketIdSet(string newMarketId); | |
| event LendingPoolUpdated(address indexed newAddress); | |
| event ConfigurationAdminUpdated(address indexed newAddress); | |
| event EmergencyAdminUpdated(address indexed newAddress); | |
| event LendingPoolConfiguratorUpdated(address indexed newAddress); | |
| event LendingPoolCollateralManagerUpdated(address indexed newAddress); | |
| event PriceOracleUpdated(address indexed newAddress); | |
| event LendingRateOracleUpdated(address indexed newAddress); | |
| event ProxyCreated(bytes32 id, address indexed newAddress); | |
| event AddressSet(bytes32 id, address indexed newAddress, bool hasProxy); | |
| function getMarketId() external view returns (string memory); | |
| function setMarketId(string calldata marketId) external; | |
| function setAddress(bytes32 id, address newAddress) external; | |
| function setAddressAsProxy(bytes32 id, address impl) external; | |
| function getAddress(bytes32 id) external view returns (address); | |
| function getLendingPool() external view returns (address); | |
| function setLendingPoolImpl(address pool) external; | |
| function getLendingPoolConfigurator() external view returns (address); | |
| function setLendingPoolConfiguratorImpl(address configurator) external; | |
| function getLendingPoolCollateralManager() external view returns (address); | |
| function setLendingPoolCollateralManager(address manager) external; | |
| function getPoolAdmin() external view returns (address); | |
| function setPoolAdmin(address admin) external; | |
| function getEmergencyAdmin() external view returns (address); | |
| function setEmergencyAdmin(address admin) external; | |
| function getPriceOracle() external view returns (address); | |
| function setPriceOracle(address priceOracle) external; | |
| function getLendingRateOracle() external view returns (address); | |
| function setLendingRateOracle(address lendingRateOracle) external; | |
| } | |
| // File: https://github.com/aave/protocol-v2/blob/master/contracts/interfaces/ILendingPool.solpragma experimental ABIEncoderV2; | |
| interface ILendingPool { | |
| /** | |
| * @dev Emitted on deposit() | |
| * @param reserve The address of the underlying asset of the reserve | |
| * @param user The address initiating the deposit | |
| * @param onBehalfOf The beneficiary of the deposit, receiving the aTokens | |
| * @param amount The amount deposited | |
| * @param referral The referral code used | |
| **/ | |
| event Deposit( | |
| address indexed reserve, | |
| address user, | |
| address indexed onBehalfOf, | |
| uint256 amount, | |
| uint16 indexed referral | |
| ); | |
| /** | |
| * @dev Emitted on withdraw() | |
| * @param reserve The address of the underlyng asset being withdrawn | |
| * @param user The address initiating the withdrawal, owner of aTokens | |
| * @param to Address that will receive the underlying | |
| * @param amount The amount to be withdrawn | |
| **/ | |
| event Withdraw(address indexed reserve, address indexed user, address indexed to, uint256 amount); | |
| /** | |
| * @dev Emitted on borrow() and flashLoan() when debt needs to be opened | |
| * @param reserve The address of the underlying asset being borrowed | |
| * @param user The address of the user initiating the borrow(), receiving the funds on borrow() or just | |
| * initiator of the transaction on flashLoan() | |
| * @param onBehalfOf The address that will be getting the debt | |
| * @param amount The amount borrowed out | |
| * @param borrowRateMode The rate mode: 1 for Stable, 2 for Variable | |
| * @param borrowRate The numeric rate at which the user has borrowed | |
| * @param referral The referral code used | |
| **/ | |
| event Borrow( | |
| address indexed reserve, | |
| address user, | |
| address indexed onBehalfOf, | |
| uint256 amount, | |
| uint256 borrowRateMode, | |
| uint256 borrowRate, | |
| uint16 indexed referral | |
| ); | |
| /** | |
| * @dev Emitted on repay() | |
| * @param reserve The address of the underlying asset of the reserve | |
| * @param user The beneficiary of the repayment, getting his debt reduced | |
| * @param repayer The address of the user initiating the repay(), providing the funds | |
| * @param amount The amount repaid | |
| **/ | |
| event Repay( | |
| address indexed reserve, | |
| address indexed user, | |
| address indexed repayer, | |
| uint256 amount | |
| ); | |
| /** | |
| * @dev Emitted on swapBorrowRateMode() | |
| * @param reserve The address of the underlying asset of the reserve | |
| * @param user The address of the user swapping his rate mode | |
| * @param rateMode The rate mode that the user wants to swap to | |
| **/ | |
| event Swap(address indexed reserve, address indexed user, uint256 rateMode); | |
| /** | |
| * @dev Emitted on setUserUseReserveAsCollateral() | |
| * @param reserve The address of the underlying asset of the reserve | |
| * @param user The address of the user enabling the usage as collateral | |
| **/ | |
| event ReserveUsedAsCollateralEnabled(address indexed reserve, address indexed user); | |
| /** | |
| * @dev Emitted on setUserUseReserveAsCollateral() | |
| * @param reserve The address of the underlying asset of the reserve | |
| * @param user The address of the user enabling the usage as collateral | |
| **/ | |
| event ReserveUsedAsCollateralDisabled(address indexed reserve, address indexed user); | |
| /** | |
| * @dev Emitted on rebalanceStableBorrowRate() | |
| * @param reserve The address of the underlying asset of the reserve | |
| * @param user The address of the user for which the rebalance has been executed | |
| **/ | |
| event RebalanceStableBorrowRate(address indexed reserve, address indexed user); | |
| /** | |
| * @dev Emitted on flashLoan() | |
| * @param target The address of the flash loan receiver contract | |
| * @param initiator The address initiating the flash loan | |
| * @param asset The address of the asset being flash borrowed | |
| * @param amount The amount flash borrowed | |
| * @param premium The fee flash borrowed | |
| * @param referralCode The referral code used | |
| **/ | |
| event FlashLoan( | |
| address indexed target, | |
| address indexed initiator, | |
| address indexed asset, | |
| uint256 amount, | |
| uint256 premium, | |
| uint16 referralCode | |
| ); | |
| /** | |
| * @dev Emitted when the pause is triggered. | |
| */ | |
| event Paused(); | |
| /** | |
| * @dev Emitted when the pause is lifted. | |
| */ | |
| event Unpaused(); | |
| /** | |
| * @dev Emitted when a borrower is liquidated. This event is emitted by the LendingPool via | |
| * LendingPoolCollateral manager using a DELEGATECALL | |
| * This allows to have the events in the generated ABI for LendingPool. | |
| * @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation | |
| * @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation | |
| * @param user The address of the borrower getting liquidated | |
| * @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover | |
| * @param liquidatedCollateralAmount The amount of collateral received by the liiquidator | |
| * @param liquidator The address of the liquidator | |
| * @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants | |
| * to receive the underlying collateral asset directly | |
| **/ | |
| event LiquidationCall( | |
| address indexed collateralAsset, | |
| address indexed debtAsset, | |
| address indexed user, | |
| uint256 debtToCover, | |
| uint256 liquidatedCollateralAmount, | |
| address liquidator, | |
| bool receiveAToken | |
| ); | |
| /** | |
| * @dev Emitted when the state of a reserve is updated. NOTE: This event is actually declared | |
| * in the ReserveLogic library and emitted in the updateInterestRates() function. Since the function is internal, | |
| * the event will actually be fired by the LendingPool contract. The event is therefore replicated here so it | |
| * gets added to the LendingPool ABI | |
| * @param reserve The address of the underlying asset of the reserve | |
| * @param liquidityRate The new liquidity rate | |
| * @param stableBorrowRate The new stable borrow rate | |
| * @param variableBorrowRate The new variable borrow rate | |
| * @param liquidityIndex The new liquidity index | |
| * @param variableBorrowIndex The new variable borrow index | |
| **/ | |
| event ReserveDataUpdated( | |
| address indexed reserve, | |
| uint256 liquidityRate, | |
| uint256 stableBorrowRate, | |
| uint256 variableBorrowRate, | |
| uint256 liquidityIndex, | |
| uint256 variableBorrowIndex | |
| ); | |
| /** | |
| * @dev Deposits an `amount` of underlying asset into the reserve, receiving in return overlying aTokens. | |
| * - E.g. User deposits 100 USDC and gets in return 100 aUSDC | |
| * @param asset The address of the underlying asset to deposit | |
| * @param amount The amount to be deposited | |
| * @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user | |
| * wants to receive them on his own wallet, or a different address if the beneficiary of aTokens | |
| * is a different wallet | |
| * @param referralCode Code used to register the integrator originating the operation, for potential rewards. | |
| * 0 if the action is executed directly by the user, without any middle-man | |
| **/ | |
| function deposit( | |
| address asset, | |
| uint256 amount, | |
| address onBehalfOf, | |
| uint16 referralCode | |
| ) external; | |
| /** | |
| * @dev Withdraws an `amount` of underlying asset from the reserve, burning the equivalent aTokens owned | |
| * E.g. User has 100 aUSDC, calls withdraw() and receives 100 USDC, burning the 100 aUSDC | |
| * @param asset The address of the underlying asset to withdraw | |
| * @param amount The underlying amount to be withdrawn | |
| * - Send the value type(uint256).max in order to withdraw the whole aToken balance | |
| * @param to Address that will receive the underlying, same as msg.sender if the user | |
| * wants to receive it on his own wallet, or a different address if the beneficiary is a | |
| * different wallet | |
| * @return The final amount withdrawn | |
| **/ | |
| function withdraw( | |
| address asset, | |
| uint256 amount, | |
| address to | |
| ) external returns (uint256); | |
| /** | |
| * @dev Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower | |
| * already deposited enough collateral, or he was given enough allowance by a credit delegator on the | |
| * corresponding debt token (StableDebtToken or VariableDebtToken) | |
| * - E.g. User borrows 100 USDC passing as `onBehalfOf` his own address, receiving the 100 USDC in his wallet | |
| * and 100 stable/variable debt tokens, depending on the `interestRateMode` | |
| * @param asset The address of the underlying asset to borrow | |
| * @param amount The amount to be borrowed | |
| * @param interestRateMode The interest rate mode at which the user wants to borrow: 1 for Stable, 2 for Variable | |
| * @param referralCode Code used to register the integrator originating the operation, for potential rewards. | |
| * 0 if the action is executed directly by the user, without any middle-man | |
| * @param onBehalfOf Address of the user who will receive the debt. Should be the address of the borrower itself | |
| * calling the function if he wants to borrow against his own collateral, or the address of the credit delegator | |
| * if he has been given credit delegation allowance | |
| **/ | |
| function borrow( | |
| address asset, | |
| uint256 amount, | |
| uint256 interestRateMode, | |
| uint16 referralCode, | |
| address onBehalfOf | |
| ) external; | |
| /** | |
| * @notice Repays a borrowed `amount` on a specific reserve, burning the equivalent debt tokens owned | |
| * - E.g. User repays 100 USDC, burning 100 variable/stable debt tokens of the `onBehalfOf` address | |
| * @param asset The address of the borrowed underlying asset previously borrowed | |
| * @param amount The amount to repay | |
| * - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode` | |
| * @param rateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable | |
| * @param onBehalfOf Address of the user who will get his debt reduced/removed. Should be the address of the | |
| * user calling the function if he wants to reduce/remove his own debt, or the address of any other | |
| * other borrower whose debt should be removed | |
| * @return The final amount repaid | |
| **/ | |
| function repay( | |
| address asset, | |
| uint256 amount, | |
| uint256 rateMode, | |
| address onBehalfOf | |
| ) external returns (uint256); | |
| /** | |
| * @dev Allows a borrower to swap his debt between stable and variable mode, or viceversa | |
| * @param asset The address of the underlying asset borrowed | |
| * @param rateMode The rate mode that the user wants to swap to | |
| **/ | |
| function swapBorrowRateMode(address asset, uint256 rateMode) external; | |
| /** | |
| * @dev Rebalances the stable interest rate of a user to the current stable rate defined on the reserve. | |
| * - Users can be rebalanced if the following conditions are satisfied: | |
| * 1. Usage ratio is above 95% | |
| * 2. the current deposit APY is below REBALANCE_UP_THRESHOLD * maxVariableBorrowRate, which means that too much has been | |
| * borrowed at a stable rate and depositors are not earning enough | |
| * @param asset The address of the underlying asset borrowed | |
| * @param user The address of the user to be rebalanced | |
| **/ | |
| function rebalanceStableBorrowRate(address asset, address user) external; | |
| /** | |
| * @dev Allows depositors to enable/disable a specific deposited asset as collateral | |
| * @param asset The address of the underlying asset deposited | |
| * @param useAsCollateral `true` if the user wants to use the deposit as collateral, `false` otherwise | |
| **/ | |
| function setUserUseReserveAsCollateral(address asset, bool useAsCollateral) external; | |
| /** | |
| * @dev Function to liquidate a non-healthy position collateral-wise, with Health Factor below 1 | |
| * - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives | |
| * a proportionally amount of the `collateralAsset` plus a bonus to cover market risk | |
| * @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation | |
| * @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation | |
| * @param user The address of the borrower getting liquidated | |
| * @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover | |
| * @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants | |
| * to receive the underlying collateral asset directly | |
| **/ | |
| function liquidationCall( | |
| address collateralAsset, | |
| address debtAsset, | |
| address user, | |
| uint256 debtToCover, | |
| bool receiveAToken | |
| ) external; | |
| /** | |
| * @dev Allows smartcontracts to access the liquidity of the pool within one transaction, | |
| * as long as the amount taken plus a fee is returned. | |
| * IMPORTANT There are security concerns for developers of flashloan receiver contracts that must be kept into consideration. | |
| * For further details please visit https://developers.aave.com | |
| * @param receiverAddress The address of the contract receiving the funds, implementing the IFlashLoanReceiver interface | |
| * @param assets The addresses of the assets being flash-borrowed | |
| * @param amounts The amounts amounts being flash-borrowed | |
| * @param modes Types of the debt to open if the flash loan is not returned: | |
| * 0 -> Don't open any debt, just revert if funds can't be transferred from the receiver | |
| * 1 -> Open debt at stable rate for the value of the amount flash-borrowed to the `onBehalfOf` address | |
| * 2 -> Open debt at variable rate for the value of the amount flash-borrowed to the `onBehalfOf` address | |
| * @param onBehalfOf The address that will receive the debt in the case of using on `modes` 1 or 2 | |
| * @param params Variadic packed params to pass to the receiver as extra information | |
| * @param referralCode Code used to register the integrator originating the operation, for potential rewards. | |
| * 0 if the action is executed directly by the user, without any middle-man | |
| **/ | |
| function flashLoan( | |
| address receiverAddress, | |
| address[] calldata assets, | |
| uint256[] calldata amounts, | |
| uint256[] calldata modes, | |
| address onBehalfOf, | |
| bytes calldata params, | |
| uint16 referralCode | |
| ) external; | |
| /** | |
| * @dev Returns the user account data across all the reserves | |
| * @param user The address of the user | |
| * @return totalCollateralETH the total collateral in ETH of the user | |
| * @return totalDebtETH the total debt in ETH of the user | |
| * @return availableBorrowsETH the borrowing power left of the user | |
| * @return currentLiquidationThreshold the liquidation threshold of the user | |
| * @return ltv the loan to value of the user | |
| * @return healthFactor the current health factor of the user | |
| **/ | |
| function getUserAccountData(address user) | |
| external | |
| view | |
| returns ( | |
| uint256 totalCollateralETH, | |
| uint256 totalDebtETH, | |
| uint256 availableBorrowsETH, | |
| uint256 currentLiquidationThreshold, | |
| uint256 ltv, | |
| uint256 healthFactor | |
| ); | |
| function initReserve( | |
| address reserve, | |
| address aTokenAddress, | |
| address stableDebtAddress, | |
| address variableDebtAddress, | |
| address interestRateStrategyAddress | |
| ) external; | |
| function setReserveInterestRateStrategyAddress(address reserve, address rateStrategyAddress) | |
| external; | |
| function setConfiguration(address reserve, uint256 configuration) external; | |
| /** | |
| * @dev Returns the configuration of the reserve | |
| * @param asset The address of the underlying asset of the reserve | |
| * @return The configuration of the reserve | |
| **/ | |
| function getConfiguration(address asset) | |
| external | |
| view | |
| returns (DataTypes.ReserveConfigurationMap memory); | |
| /** | |
| * @dev Returns the configuration of the user across all the reserves | |
| * @param user The user address | |
| * @return The configuration of the user | |
| **/ | |
| function getUserConfiguration(address user) | |
| external | |
| view | |
| returns (DataTypes.UserConfigurationMap memory); | |
| /** | |
| * @dev Returns the normalized income normalized income of the reserve | |
| * @param asset The address of the underlying asset of the reserve | |
| * @return The reserve's normalized income | |
| */ | |
| function getReserveNormalizedIncome(address asset) external view returns (uint256); | |
| /** | |
| * @dev Returns the normalized variable debt per unit of asset | |
| * @param asset The address of the underlying asset of the reserve | |
| * @return The reserve normalized variable debt | |
| */ | |
| function getReserveNormalizedVariableDebt(address asset) external view returns (uint256); | |
| /** | |
| * @dev Returns the state and configuration of the reserve | |
| * @param asset The address of the underlying asset of the reserve | |
| * @return The state of the reserve | |
| **/ | |
| function getReserveData(address asset) external view returns (DataTypes.ReserveData memory); | |
| function finalizeTransfer( | |
| address asset, | |
| address from, | |
| address to, | |
| uint256 amount, | |
| uint256 balanceFromAfter, | |
| uint256 balanceToBefore | |
| ) external; | |
| function getReservesList() external view returns (address[] memory); | |
| function getAddressesProvider() external view returns (ILendingPoolAddressesProvider); | |
| function setPause(bool val) external; | |
| function paused() external view returns (bool); | |
| } | |
| // File: https://github.com/aave/protocol-v2/blob/master/contracts/flashloan/interfaces/IFlashLoanReceiver.sol | |
| /** | |
| * @title IFlashLoanReceiver interface | |
| * @notice Interface for the Aave fee IFlashLoanReceiver. | |
| * @author Aave | |
| * @dev implement this interface to develop a flashloan-compatible flashLoanReceiver contract | |
| **/ | |
| interface IFlashLoanReceiver { | |
| function executeOperation( | |
| address[] calldata assets, | |
| uint256[] calldata amounts, | |
| uint256[] calldata premiums, | |
| address initiator, | |
| bytes calldata params | |
| ) external returns (bool); | |
| function ADDRESSES_PROVIDER() external view returns (ILendingPoolAddressesProvider); | |
| function LENDING_POOL() external view returns (ILendingPool); | |
| } | |
| // File: https://github.com/aave/protocol-v2/blob/master/contracts/dependencies/openzeppelin/contracts/Address.sol | |
| /** | |
| * @dev Collection of functions related to the address type | |
| */ | |
| library Address { | |
| /** | |
| * @dev Returns true if `account` is a contract. | |
| * | |
| * [IMPORTANT] | |
| * ==== | |
| * It is unsafe to assume that an address for which this function returns | |
| * false is an externally-owned account (EOA) and not a contract. | |
| * | |
| * Among others, `isContract` will return false for the following | |
| * types of addresses: | |
| * | |
| * - an externally-owned account | |
| * - a contract in construction | |
| * - an address where a contract will be created | |
| * - an address where a contract lived, but was destroyed | |
| * ==== | |
| */ | |
| function isContract(address account) internal view returns (bool) { | |
| // According to EIP-1052, 0x0 is the value returned for not-yet created accounts | |
| // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned | |
| // for accounts without code, i.e. `keccak256('')` | |
| bytes32 codehash; | |
| bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; | |
| // solhint-disable-next-line no-inline-assembly | |
| assembly { | |
| codehash := extcodehash(account) | |
| } | |
| return (codehash != accountHash && codehash != 0x0); | |
| } | |
| /** | |
| * @dev Replacement for Solidity's `transfer`: sends `amount` wei to | |
| * `recipient`, forwarding all available gas and reverting on errors. | |
| * | |
| * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost | |
| * of certain opcodes, possibly making contracts go over the 2300 gas limit | |
| * imposed by `transfer`, making them unable to receive funds via | |
| * `transfer`. {sendValue} removes this limitation. | |
| * | |
| * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. | |
| * | |
| * IMPORTANT: because control is transferred to `recipient`, care must be | |
| * taken to not create reentrancy vulnerabilities. Consider using | |
| * {ReentrancyGuard} or the | |
| * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. | |
| */ | |
| function sendValue(address payable recipient, uint256 amount) internal { | |
| require(address(this).balance >= amount, 'Address: insufficient balance'); | |
| // solhint-disable-next-line avoid-low-level-calls, avoid-call-value | |
| (bool success, ) = recipient.call{value: amount}(''); | |
| require(success, 'Address: unable to send value, recipient may have reverted'); | |
| } | |
| } | |
| // File: https://github.com/aave/protocol-v2/blob/master/contracts/dependencies/openzeppelin/contracts/IERC20.sol | |
| /** | |
| * @dev Interface of the ERC20 standard as defined in the EIP. | |
| */ | |
| interface IERC20 { | |
| /** | |
| * @dev Returns the amount of tokens in existence. | |
| */ | |
| function totalSupply() external view returns (uint256); | |
| /** | |
| * @dev Returns the amount of tokens owned by `account`. | |
| */ | |
| function balanceOf(address account) external view returns (uint256); | |
| /** | |
| * @dev Moves `amount` tokens from the caller's account to `recipient`. | |
| * | |
| * Returns a boolean value indicating whether the operation succeeded. | |
| * | |
| * Emits a {Transfer} event. | |
| */ | |
| function transfer(address recipient, uint256 amount) external returns (bool); | |
| /** | |
| * @dev Returns the remaining number of tokens that `spender` will be | |
| * allowed to spend on behalf of `owner` through {transferFrom}. This is | |
| * zero by default. | |
| * | |
| * This value changes when {approve} or {transferFrom} are called. | |
| */ | |
| function allowance(address owner, address spender) external view returns (uint256); | |
| /** | |
| * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. | |
| * | |
| * Returns a boolean value indicating whether the operation succeeded. | |
| * | |
| * IMPORTANT: Beware that changing an allowance with this method brings the risk | |
| * that someone may use both the old and the new allowance by unfortunate | |
| * transaction ordering. One possible solution to mitigate this race | |
| * condition is to first reduce the spender's allowance to 0 and set the | |
| * desired value afterwards: | |
| * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 | |
| * | |
| * Emits an {Approval} event. | |
| */ | |
| function approve(address spender, uint256 amount) external returns (bool); | |
| /** | |
| * @dev Moves `amount` tokens from `sender` to `recipient` using the | |
| * allowance mechanism. `amount` is then deducted from the caller's | |
| * allowance. | |
| * | |
| * Returns a boolean value indicating whether the operation succeeded. | |
| * | |
| * Emits a {Transfer} event. | |
| */ | |
| function transferFrom( | |
| address sender, | |
| address recipient, | |
| uint256 amount | |
| ) external returns (bool); | |
| /** | |
| * @dev Emitted when `value` tokens are moved from one account (`from`) to | |
| * another (`to`). | |
| * | |
| * Note that `value` may be zero. | |
| */ | |
| event Transfer(address indexed from, address indexed to, uint256 value); | |
| /** | |
| * @dev Emitted when the allowance of a `spender` for an `owner` is set by | |
| * a call to {approve}. `value` is the new allowance. | |
| */ | |
| event Approval(address indexed owner, address indexed spender, uint256 value); | |
| } | |
| // File: https://github.com/aave/protocol-v2/blob/master/contracts/dependencies/openzeppelin/contracts/SafeMath.sol | |
| /** | |
| * @dev Wrappers over Solidity's arithmetic operations with added overflow | |
| * checks. | |
| * | |
| * Arithmetic operations in Solidity wrap on overflow. This can easily result | |
| * in bugs, because programmers usually assume that an overflow raises an | |
| * error, which is the standard behavior in high level programming languages. | |
| * `SafeMath` restores this intuition by reverting the transaction when an | |
| * operation overflows. | |
| * | |
| * Using this library instead of the unchecked operations eliminates an entire | |
| * class of bugs, so it's recommended to use it always. | |
| */ | |
| library SafeMath { | |
| /** | |
| * @dev Returns the addition of two unsigned integers, reverting on | |
| * overflow. | |
| * | |
| * Counterpart to Solidity's `+` operator. | |
| * | |
| * Requirements: | |
| * - Addition cannot overflow. | |
| */ | |
| function add(uint256 a, uint256 b) internal pure returns (uint256) { | |
| uint256 c = a + b; | |
| require(c >= a, 'SafeMath: addition overflow'); | |
| return c; | |
| } | |
| /** | |
| * @dev Returns the subtraction of two unsigned integers, reverting on | |
| * overflow (when the result is negative). | |
| * | |
| * Counterpart to Solidity's `-` operator. | |
| * | |
| * Requirements: | |
| * - Subtraction cannot overflow. | |
| */ | |
| function sub(uint256 a, uint256 b) internal pure returns (uint256) { | |
| return sub(a, b, 'SafeMath: subtraction overflow'); | |
| } | |
| /** | |
| * @dev Returns the subtraction of two unsigned integers, reverting with custom message on | |
| * overflow (when the result is negative). | |
| * | |
| * Counterpart to Solidity's `-` operator. | |
| * | |
| * Requirements: | |
| * - Subtraction cannot overflow. | |
| */ | |
| function sub( | |
| uint256 a, | |
| uint256 b, | |
| string memory errorMessage | |
| ) internal pure returns (uint256) { | |
| require(b <= a, errorMessage); | |
| uint256 c = a - b; | |
| return c; | |
| } | |
| /** | |
| * @dev Returns the multiplication of two unsigned integers, reverting on | |
| * overflow. | |
| * | |
| * Counterpart to Solidity's `*` operator. | |
| * | |
| * Requirements: | |
| * - Multiplication cannot overflow. | |
| */ | |
| function mul(uint256 a, uint256 b) internal pure returns (uint256) { | |
| // Gas optimization: this is cheaper than requiring 'a' not being zero, but the | |
| // benefit is lost if 'b' is also tested. | |
| // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 | |
| if (a == 0) { | |
| return 0; | |
| } | |
| uint256 c = a * b; | |
| require(c / a == b, 'SafeMath: multiplication overflow'); | |
| return c; | |
| } | |
| /** | |
| * @dev Returns the integer division of two unsigned integers. Reverts on | |
| * division by zero. The result is rounded towards zero. | |
| * | |
| * Counterpart to Solidity's `/` operator. Note: this function uses a | |
| * `revert` opcode (which leaves remaining gas untouched) while Solidity | |
| * uses an invalid opcode to revert (consuming all remaining gas). | |
| * | |
| * Requirements: | |
| * - The divisor cannot be zero. | |
| */ | |
| function div(uint256 a, uint256 b) internal pure returns (uint256) { | |
| return div(a, b, 'SafeMath: division by zero'); | |
| } | |
| /** | |
| * @dev Returns the integer division of two unsigned integers. Reverts with custom message on | |
| * division by zero. The result is rounded towards zero. | |
| * | |
| * Counterpart to Solidity's `/` operator. Note: this function uses a | |
| * `revert` opcode (which leaves remaining gas untouched) while Solidity | |
| * uses an invalid opcode to revert (consuming all remaining gas). | |
| * | |
| * Requirements: | |
| * - The divisor cannot be zero. | |
| */ | |
| function div( | |
| uint256 a, | |
| uint256 b, | |
| string memory errorMessage | |
| ) internal pure returns (uint256) { | |
| // Solidity only automatically asserts when dividing by 0 | |
| require(b > 0, errorMessage); | |
| uint256 c = a / b; | |
| // assert(a == b * c + a % b); // There is no case in which this doesn't hold | |
| return c; | |
| } | |
| /** | |
| * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), | |
| * Reverts when dividing by zero. | |
| * | |
| * Counterpart to Solidity's `%` operator. This function uses a `revert` | |
| * opcode (which leaves remaining gas untouched) while Solidity uses an | |
| * invalid opcode to revert (consuming all remaining gas). | |
| * | |
| * Requirements: | |
| * - The divisor cannot be zero. | |
| */ | |
| function mod(uint256 a, uint256 b) internal pure returns (uint256) { | |
| return mod(a, b, 'SafeMath: modulo by zero'); | |
| } | |
| /** | |
| * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), | |
| * Reverts with custom message when dividing by zero. | |
| * | |
| * Counterpart to Solidity's `%` operator. This function uses a `revert` | |
| * opcode (which leaves remaining gas untouched) while Solidity uses an | |
| * invalid opcode to revert (consuming all remaining gas). | |
| * | |
| * Requirements: | |
| * - The divisor cannot be zero. | |
| */ | |
| function mod( | |
| uint256 a, | |
| uint256 b, | |
| string memory errorMessage | |
| ) internal pure returns (uint256) { | |
| require(b != 0, errorMessage); | |
| return a % b; | |
| } | |
| } | |
| // File: https://github.com/aave/protocol-v2/blob/master/contracts/dependencies/openzeppelin/contracts/SafeERC20.sol | |
| /** | |
| * @title SafeERC20 | |
| * @dev Wrappers around ERC20 operations that throw on failure (when the token | |
| * contract returns false). Tokens that return no value (and instead revert or | |
| * throw on failure) are also supported, non-reverting calls are assumed to be | |
| * successful. | |
| * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, | |
| * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. | |
| */ | |
| library SafeERC20 { | |
| using SafeMath for uint256; | |
| using Address for address; | |
| function safeTransfer( | |
| IERC20 token, | |
| address to, | |
| uint256 value | |
| ) internal { | |
| callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); | |
| } | |
| function safeTransferFrom( | |
| IERC20 token, | |
| address from, | |
| address to, | |
| uint256 value | |
| ) internal { | |
| callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); | |
| } | |
| function safeApprove( | |
| IERC20 token, | |
| address spender, | |
| uint256 value | |
| ) internal { | |
| require( | |
| (value == 0) || (token.allowance(address(this), spender) == 0), | |
| 'SafeERC20: approve from non-zero to non-zero allowance' | |
| ); | |
| callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); | |
| } | |
| function callOptionalReturn(IERC20 token, bytes memory data) private { | |
| require(address(token).isContract(), 'SafeERC20: call to non-contract'); | |
| // solhint-disable-next-line avoid-low-level-calls | |
| (bool success, bytes memory returndata) = address(token).call(data); | |
| require(success, 'SafeERC20: low-level call failed'); | |
| if (returndata.length > 0) { | |
| // Return data is optional | |
| // solhint-disable-next-line max-line-length | |
| require(abi.decode(returndata, (bool)), 'SafeERC20: ERC20 operation did not succeed'); | |
| } | |
| } | |
| } | |
| // File: https://github.com/aave/protocol-v2/blob/master/contracts/flashloan/base/FlashLoanReceiverBase.sol | |
| abstract contract FlashLoanReceiverBase is IFlashLoanReceiver { | |
| using SafeERC20 for IERC20; | |
| using SafeMath for uint256; | |
| ILendingPoolAddressesProvider public immutable override ADDRESSES_PROVIDER; | |
| ILendingPool public immutable override LENDING_POOL; | |
| constructor(ILendingPoolAddressesProvider provider) public { | |
| ADDRESSES_PROVIDER = provider; | |
| LENDING_POOL = ILendingPool(provider.getLendingPool()); | |
| } | |
| } | |
| /* | |
| * @dev Provides information about the current execution context, including the | |
| * sender of the transaction and its data. While these are generally available | |
| * via msg.sender and msg.data, they should not be accessed in such a direct | |
| * manner, since when dealing with GSN meta-transactions the account sending and | |
| * paying for execution may not be the actual sender (as far as an application | |
| * is concerned). | |
| * | |
| * This contract is only required for intermediate, library-like contracts. | |
| */ | |
| abstract contract Context { | |
| function _msgSender() internal view virtual returns (address payable) { | |
| return msg.sender; | |
| } | |
| function _msgData() internal view virtual returns (bytes memory) { | |
| this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 | |
| return msg.data; | |
| } | |
| } | |
| // File: Arbitrage_flat.sol | |
| contract Ownable { | |
| address public owner; | |
| event OwnershipTransferred( | |
| address indexed previousOwner, | |
| address indexed newOwner | |
| ); | |
| /** | |
| * @dev The Ownable constructor sets the original `owner` of the contract to the sender | |
| * account. | |
| */ | |
| constructor()public { | |
| owner = msg.sender; | |
| } | |
| /** | |
| * @dev Throws if called by any account other than the owner. | |
| */ | |
| modifier onlyOwner() { | |
| require(msg.sender == owner,"Ownable: caller is not the owner"); | |
| _; | |
| } | |
| /** | |
| * @dev Allows the current owner to transfer control of the contract to a newOwner. | |
| * @param newOwner The address to transfer ownership to. | |
| */ | |
| function transferOwnership(address newOwner) public onlyOwner { | |
| require(newOwner != address(0)); | |
| emit OwnershipTransferred(owner, newOwner); | |
| owner = newOwner; | |
| } | |
| } | |
| /** | |
| * @dev Implementation of the {IERC20} interface. | |
| * | |
| * This implementation is agnostic to the way tokens are created. This means | |
| * that a supply mechanism has to be added in a derived contract using {_mint}. | |
| * For a generic mechanism see {ERC20PresetMinterPauser}. | |
| * | |
| * TIP: For a detailed writeup see our guide | |
| * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How | |
| * to implement supply mechanisms]. | |
| * | |
| * We have followed general OpenZeppelin guidelines: functions revert instead | |
| * of returning `false` on failure. This behavior is nonetheless conventional | |
| * and does not conflict with the expectations of ERC20 applications. | |
| * | |
| * Additionally, an {Approval} event is emitted on calls to {transferFrom}. | |
| * This allows applications to reconstruct the allowance for all accounts just | |
| * by listening to said events. Other implementations of the EIP may not emit | |
| * these events, as it isn't required by the specification. | |
| * | |
| * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} | |
| * functions have been added to mitigate the well-known issues around setting | |
| * allowances. See {IERC20-approve}. | |
| */ | |
| contract ERC20 is Context, IERC20 { | |
| using SafeMath for uint256; | |
| mapping (address => uint256) private _balances; | |
| mapping (address => mapping (address => uint256)) private _allowances; | |
| uint256 private _totalSupply; | |
| string private _name; | |
| string private _symbol; | |
| uint8 private _decimals; | |
| /** | |
| * @dev Sets the values for {name} and {symbol}, initializes {decimals} with | |
| * a default value of 18. | |
| * | |
| * To select a different value for {decimals}, use {_setupDecimals}. | |
| * | |
| * All three of these values are immutable: they can only be set once during | |
| * construction. | |
| */ | |
| constructor (string memory name_, string memory symbol_) public { | |
| _name = name_; | |
| _symbol = symbol_; | |
| _decimals = 18; | |
| } | |
| /** | |
| * @dev Returns the name of the token. | |
| */ | |
| function name() public view virtual returns (string memory) { | |
| return _name; | |
| } | |
| /** | |
| * @dev Returns the symbol of the token, usually a shorter version of the | |
| * name. | |
| */ | |
| function symbol() public view virtual returns (string memory) { | |
| return _symbol; | |
| } | |
| /** | |
| * @dev Returns the number of decimals used to get its user representation. | |
| * For example, if `decimals` equals `2`, a balance of `505` tokens should | |
| * be displayed to a user as `5,05` (`505 / 10 ** 2`). | |
| * | |
| * Tokens usually opt for a value of 18, imitating the relationship between | |
| * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is | |
| * called. | |
| * | |
| * NOTE: This information is only used for _display_ purposes: it in | |
| * no way affects any of the arithmetic of the contract, including | |
| * {IERC20-balanceOf} and {IERC20-transfer}. | |
| */ | |
| function decimals() public view virtual returns (uint8) { | |
| return _decimals; | |
| } | |
| /** | |
| * @dev See {IERC20-totalSupply}. | |
| */ | |
| function totalSupply() public view virtual override returns (uint256) { | |
| return _totalSupply; | |
| } | |
| /** | |
| * @dev See {IERC20-balanceOf}. | |
| */ | |
| function balanceOf(address account) public view virtual override returns (uint256) { | |
| return _balances[account]; | |
| } | |
| /** | |
| * @dev See {IERC20-transfer}. | |
| * | |
| * Requirements: | |
| * | |
| * - `recipient` cannot be the zero address. | |
| * - the caller must have a balance of at least `amount`. | |
| */ | |
| function transfer(address recipient, uint256 amount) public virtual override returns (bool) { | |
| _transfer(_msgSender(), recipient, amount); | |
| return true; | |
| } | |
| /** | |
| * @dev See {IERC20-allowance}. | |
| */ | |
| function allowance(address owner, address spender) public view virtual override returns (uint256) { | |
| return _allowances[owner][spender]; | |
| } | |
| /** | |
| * @dev See {IERC20-approve}. | |
| * | |
| * Requirements: | |
| * | |
| * - `spender` cannot be the zero address. | |
| */ | |
| function approve(address spender, uint256 amount) public virtual override returns (bool) { | |
| _approve(_msgSender(), spender, amount); | |
| return true; | |
| } | |
| /** | |
| * @dev See {IERC20-transferFrom}. | |
| * | |
| * Emits an {Approval} event indicating the updated allowance. This is not | |
| * required by the EIP. See the note at the beginning of {ERC20}. | |
| * | |
| * Requirements: | |
| * | |
| * - `sender` and `recipient` cannot be the zero address. | |
| * - `sender` must have a balance of at least `amount`. | |
| * - the caller must have allowance for ``sender``'s tokens of at least | |
| * `amount`. | |
| */ | |
| function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { | |
| _transfer(sender, recipient, amount); | |
| _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); | |
| return true; | |
| } | |
| /** | |
| * @dev Atomically increases the allowance granted to `spender` by the caller. | |
| * | |
| * This is an alternative to {approve} that can be used as a mitigation for | |
| * problems described in {IERC20-approve}. | |
| * | |
| * Emits an {Approval} event indicating the updated allowance. | |
| * | |
| * Requirements: | |
| * | |
| * - `spender` cannot be the zero address. | |
| */ | |
| function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { | |
| _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); | |
| return true; | |
| } | |
| /** | |
| * @dev Atomically decreases the allowance granted to `spender` by the caller. | |
| * | |
| * This is an alternative to {approve} that can be used as a mitigation for | |
| * problems described in {IERC20-approve}. | |
| * | |
| * Emits an {Approval} event indicating the updated allowance. | |
| * | |
| * Requirements: | |
| * | |
| * - `spender` cannot be the zero address. | |
| * - `spender` must have allowance for the caller of at least | |
| * `subtractedValue`. | |
| */ | |
| function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { | |
| _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); | |
| return true; | |
| } | |
| /** | |
| * @dev Moves tokens `amount` from `sender` to `recipient`. | |
| * | |
| * This is internal function is equivalent to {transfer}, and can be used to | |
| * e.g. implement automatic token fees, slashing mechanisms, etc. | |
| * | |
| * Emits a {Transfer} event. | |
| * | |
| * Requirements: | |
| * | |
| * - `sender` cannot be the zero address. | |
| * - `recipient` cannot be the zero address. | |
| * - `sender` must have a balance of at least `amount`. | |
| */ | |
| function _transfer(address sender, address recipient, uint256 amount) internal virtual { | |
| require(sender != address(0), "ERC20: transfer from the zero address"); | |
| require(recipient != address(0), "ERC20: transfer to the zero address"); | |
| _beforeTokenTransfer(sender, recipient, amount); | |
| _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); | |
| _balances[recipient] = _balances[recipient].add(amount); | |
| emit Transfer(sender, recipient, amount); | |
| } | |
| /** @dev Creates `amount` tokens and assigns them to `account`, increasing | |
| * the total supply. | |
| * | |
| * Emits a {Transfer} event with `from` set to the zero address. | |
| * | |
| * Requirements: | |
| * | |
| * - `to` cannot be the zero address. | |
| */ | |
| function _mint(address account, uint256 amount) internal virtual { | |
| require(account != address(0), "ERC20: mint to the zero address"); | |
| _beforeTokenTransfer(address(0), account, amount); | |
| _totalSupply = _totalSupply.add(amount); | |
| _balances[account] = _balances[account].add(amount); | |
| emit Transfer(address(0), account, amount); | |
| } | |
| /** | |
| * @dev Destroys `amount` tokens from `account`, reducing the | |
| * total supply. | |
| * | |
| * Emits a {Transfer} event with `to` set to the zero address. | |
| * | |
| * Requirements: | |
| * | |
| * - `account` cannot be the zero address. | |
| * - `account` must have at least `amount` tokens. | |
| */ | |
| function _burn(address account, uint256 amount) internal virtual { | |
| require(account != address(0), "ERC20: burn from the zero address"); | |
| _beforeTokenTransfer(account, address(0), amount); | |
| _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); | |
| _totalSupply = _totalSupply.sub(amount); | |
| emit Transfer(account, address(0), amount); | |
| } | |
| /** | |
| * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. | |
| * | |
| * This internal function is equivalent to `approve`, and can be used to | |
| * e.g. set automatic allowances for certain subsystems, etc. | |
| * | |
| * Emits an {Approval} event. | |
| * | |
| * Requirements: | |
| * | |
| * - `owner` cannot be the zero address. | |
| * - `spender` cannot be the zero address. | |
| */ | |
| function _approve(address owner, address spender, uint256 amount) internal virtual { | |
| require(owner != address(0), "ERC20: approve from the zero address"); | |
| require(spender != address(0), "ERC20: approve to the zero address"); | |
| _allowances[owner][spender] = amount; | |
| emit Approval(owner, spender, amount); | |
| } | |
| /** | |
| * @dev Sets {decimals} to a value other than the default one of 18. | |
| * | |
| * WARNING: This function should only be called from the constructor. Most | |
| * applications that interact with token contracts will not expect | |
| * {decimals} to ever change, and may work incorrectly if it does. | |
| */ | |
| function _setupDecimals(uint8 decimals_) internal virtual { | |
| _decimals = decimals_; | |
| } | |
| /** | |
| * @dev Hook that is called before any transfer of tokens. This includes | |
| * minting and burning. | |
| * | |
| * Calling conditions: | |
| * | |
| * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens | |
| * will be to transferred to `to`. | |
| * - when `from` is zero, `amount` tokens will be minted for `to`. | |
| * - when `to` is zero, `amount` of ``from``'s tokens will be burned. | |
| * - `from` and `to` are never both zero. | |
| * | |
| * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. | |
| */ | |
| function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } | |
| } | |
| contract WBNB is ERC20 { | |
| // string public name = "Wrapped BNB"; | |
| // string public symbol = "WBNB"; | |
| // uint8 public decimals = 18; | |
| event Deposit(address indexed account, uint256 amount); | |
| event Withdrawal(address indexed account, uint256 amount); | |
| constructor() public ERC20("Wrapped BNB", "WBNB") {} | |
| function deposit() external payable { | |
| _mint(msg.sender, msg.value); | |
| emit Deposit(msg.sender, msg.value); | |
| } | |
| function withdraw(uint256 _amount) external { | |
| _burn(msg.sender, _amount); | |
| payable(msg.sender).transfer(_amount); | |
| emit Withdrawal(msg.sender, _amount); | |
| } | |
| } | |
| contract FlashLoanSimpleArbitrage is FlashLoanReceiverBase { | |
| //-------------------------------------------------------------------- | |
| // VARIABLES | |
| address public owner; | |
| address public exchangeA; | |
| address public exchangeB; | |
| address public tokenA; | |
| address public tokenB; | |
| address public devAddr; | |
| enum Exchange { | |
| EXCA, | |
| EXCB, | |
| NONE | |
| } | |
| //-------------------------------------------------------------------- | |
| // MODIFIERS | |
| modifier onlyOwner() { | |
| require(msg.sender == owner, "only owner can call this"); | |
| _; | |
| } | |
| //-------------------------------------------------------------------- | |
| // CONSTRUCTOR | |
| constructor( | |
| address _addressProvider, // 0x5E52dEc931FFb32f609681B8438A51c675cc232d | |
| address _exchangeA, // 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D | |
| address _exchangeB, // 0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506 | |
| address _tokenA, | |
| address _tokenB, | |
| address _devAddr | |
| ) | |
| public | |
| FlashLoanReceiverBase(ILendingPoolAddressesProvider(_addressProvider)) | |
| { | |
| owner = msg.sender; | |
| exchangeA = _exchangeA; | |
| exchangeB = _exchangeB; | |
| tokenA = _tokenA; | |
| tokenB = _tokenB; | |
| devAddr = _devAddr; | |
| } | |
| //-------------------------------------------------------------------- | |
| // ARBITRAGE FUNCTIONS/LOGIC | |
| function withdrawERC(address _tokenAddress, uint256 amount) public onlyOwner { | |
| uint256 erc20Balance = getTokenBalance(_tokenAddress); | |
| require(amount <= erc20Balance, "Not enough balance"); | |
| IERC20(_tokenAddress).transfer(msg.sender, amount); | |
| } | |
| function withdrawETH(uint256 amount) public onlyOwner { | |
| uint256 ethBalance = getETHBalance(); | |
| require(amount <= ethBalance, "Not enough balance"); | |
| payable(owner).transfer(amount); | |
| } | |
| function simpleArbitrage(uint256 _amountIn) public payable { | |
| uint256 amountIn = 0; | |
| if(tokenA == address(0)) { | |
| amountIn = msg.value; | |
| } else { | |
| amountIn = _amountIn; | |
| } | |
| uint256 amountOut = 0; | |
| uint256 amountOut_ = 0; | |
| Exchange result = _comparePrice(tokenA, tokenB, amountIn); // loan amountIn | |
| if (result == Exchange.EXCA) { | |
| // sell loanToken in uniswap for swapToken with high price and buy loanToken from sushiswap with lower price | |
| amountOut = _swap( | |
| amountIn, | |
| exchangeA, | |
| tokenA, | |
| tokenB | |
| ); | |
| } else if (result == Exchange.EXCB) { | |
| // sell loanToken in sushiswap for swapToken with high price and buy loanToken from uniswap with lower price | |
| amountOut = _swap( | |
| amountIn, | |
| exchangeB, | |
| tokenA, | |
| tokenB | |
| ); | |
| } else { | |
| revert("No Arbitrage Found"); | |
| } | |
| Exchange result_ = _comparePrice(tokenB, tokenA, amountOut); // loan amountIn | |
| if (result_ == Exchange.EXCA) { | |
| // sell loanToken in uniswap for swapToken with high price and buy loanToken from sushiswap with lower price | |
| amountOut_ = _swap( | |
| amountOut, | |
| exchangeA, | |
| tokenB, | |
| tokenA | |
| ); | |
| } else if (result_ == Exchange.EXCB) { | |
| // sell loanToken in sushiswap for swapToken with high price and buy loanToken from uniswap with lower price | |
| amountOut_ = _swap( | |
| amountOut, | |
| exchangeB, | |
| tokenB, | |
| tokenA | |
| ); | |
| } else { | |
| revert("No Arbitrage Found"); | |
| } | |
| require(amountOut_ > amountIn, "Trade Reverted, Arbitrage not profitable"); | |
| if(tokenA == address(0)) { | |
| payable(devAddr).transfer(amountOut_); | |
| } else { | |
| IERC20(tokenA).transfer(devAddr, amountOut_); | |
| } | |
| } | |
| function simpleArbitrageFlashloan(uint256 _amountIn) internal returns(uint256){ | |
| address _tokenA; | |
| if(tokenA == address(0)) { | |
| // amountIn = msg.value; | |
| address WETH = IUniswapV2Router02(exchangeB).WETH(); | |
| _tokenA = WETH; | |
| } else { | |
| _tokenA = tokenA; | |
| // amountIn = _amountIn; | |
| } | |
| uint256 amountOut = 0; | |
| uint256 amountOut_ = 0; | |
| Exchange result = _comparePrice(_tokenA, tokenB, _amountIn); // loan _amountIn | |
| if (result == Exchange.EXCA) { | |
| // sell loanToken in uniswap for swapToken with high price and buy loanToken from sushiswap with lower price | |
| amountOut = _swap( | |
| _amountIn, | |
| exchangeA, | |
| _tokenA, | |
| tokenB | |
| ); | |
| } else if (result == Exchange.EXCB) { | |
| // sell loanToken in sushiswap for swapToken with high price and buy loanToken from uniswap with lower price | |
| amountOut = _swap( | |
| _amountIn, | |
| exchangeB, | |
| _tokenA, | |
| tokenB | |
| ); | |
| } else { | |
| revert("No Arbitrage Found"); | |
| } | |
| Exchange result_ = _comparePrice(tokenB, _tokenA, amountOut); // loan amountIn | |
| if (result_ == Exchange.EXCA) { | |
| // sell loanToken in uniswap for swapToken with high price and buy loanToken from sushiswap with lower price | |
| amountOut_ = _swap( | |
| amountOut, | |
| exchangeA, | |
| tokenB, | |
| _tokenA | |
| ); | |
| } else if (result_ == Exchange.EXCB) { | |
| // sell loanToken in sushiswap for swapToken with high price and buy loanToken from uniswap with lower price | |
| amountOut_ = _swap( | |
| amountOut, | |
| exchangeB, | |
| tokenB, | |
| _tokenA | |
| ); | |
| } else { | |
| revert("No Arbitrage Found"); | |
| } | |
| require(amountOut_ > _amountIn, "Trade Reverted, Arbitrage not profitable"); | |
| return amountOut_; | |
| } | |
| function _swap( | |
| uint256 amountIn, | |
| address routerAddress, | |
| address sell_token, | |
| address buy_token | |
| ) internal returns (uint256) { | |
| address WETH = IUniswapV2Router02(routerAddress).WETH(); | |
| if(sell_token == address(0)) { | |
| sell_token = WETH; | |
| // IERC20(sell_token).approve(routerAddress, amountIn); | |
| uint256 amountOutMin = (_getAmountOut( | |
| routerAddress, | |
| sell_token, | |
| buy_token, | |
| amountIn | |
| ) * 95) / 100; | |
| address[] memory path = new address[](2); | |
| path[0] = sell_token; | |
| path[1] = buy_token; | |
| uint256 amountOut = IUniswapV2Router02(routerAddress) | |
| .swapExactETHForTokens{value : amountIn}( | |
| amountOutMin, | |
| path, | |
| address(this), | |
| block.timestamp + 15 minutes | |
| )[1]; | |
| return amountOut; | |
| } else if(buy_token == address(0)) { | |
| buy_token = WETH; | |
| IERC20(sell_token).approve(routerAddress, amountIn); | |
| uint256 amountOutMin = (_getAmountOut( | |
| routerAddress, | |
| sell_token, | |
| buy_token, | |
| amountIn | |
| ) * 95) / 100; | |
| address[] memory path = new address[](2); | |
| path[0] = sell_token; | |
| path[1] = buy_token; | |
| uint256 amountOut = IUniswapV2Router02(routerAddress) | |
| .swapExactTokensForETH( | |
| amountIn, | |
| amountOutMin, | |
| path, | |
| address(this), | |
| block.timestamp + 15 minutes | |
| )[1]; | |
| return amountOut; | |
| } else { | |
| IERC20(sell_token).approve(routerAddress, amountIn); | |
| uint256 amountOutMin = (_getAmountOut( | |
| routerAddress, | |
| sell_token, | |
| buy_token, | |
| amountIn | |
| ) * 95) / 100; | |
| address[] memory path = new address[](2); | |
| path[0] = sell_token; | |
| path[1] = buy_token; | |
| uint256 amountOut = IUniswapV2Router02(routerAddress) | |
| .swapExactTokensForTokens( | |
| amountIn, | |
| amountOutMin, | |
| path, | |
| address(this), | |
| block.timestamp + 15 minutes | |
| )[1]; | |
| return amountOut; | |
| } | |
| } | |
| function _comparePrice(address _tokenA, address _tokenB, uint256 amount) internal view returns (Exchange) { | |
| address WETH = IUniswapV2Router02(exchangeA).WETH(); | |
| if(_tokenA == address(0)) _tokenA = WETH; | |
| else if(_tokenB == address(0)) _tokenB = WETH; | |
| uint256 exchangeAPrice = _getAmountOut( | |
| exchangeA, | |
| _tokenA, | |
| _tokenB, | |
| amount | |
| ); | |
| uint256 exchangeBPrice = _getAmountOut( | |
| exchangeB, | |
| _tokenA, | |
| _tokenB, | |
| amount | |
| ); | |
| // we try to sell ETH with higher price and buy it back with low price to make profit | |
| if (exchangeAPrice > exchangeBPrice) { | |
| require( | |
| _checkIfArbitrageIsProfitable( | |
| amount, | |
| exchangeAPrice, | |
| exchangeBPrice | |
| ), | |
| "Arbitrage not profitable" | |
| ); | |
| return Exchange.EXCA; | |
| } else if (exchangeAPrice < exchangeBPrice) { | |
| require( | |
| _checkIfArbitrageIsProfitable( | |
| amount, | |
| exchangeBPrice, | |
| exchangeAPrice | |
| ), | |
| "Arbitrage not profitable" | |
| ); | |
| return Exchange.EXCB; | |
| } else { | |
| return Exchange.NONE; | |
| } | |
| } | |
| function _checkIfArbitrageIsProfitable( | |
| uint256 amountIn, | |
| uint256 higherPrice, | |
| uint256 lowerPrice | |
| ) internal pure returns (bool) { | |
| // uniswap & sushiswap have 0.3% fee for every exchange | |
| // so gain made must be greater than 2 * 0.3% * arbitrage_amount | |
| // difference in ETH | |
| uint256 difference = ((higherPrice - lowerPrice) * 10**18) / | |
| higherPrice; | |
| uint256 payed_fee = (amountIn * 3) / 1000; | |
| if (difference > payed_fee) { | |
| return true; | |
| } else { | |
| return false; | |
| } | |
| } | |
| function _getAmountOut( | |
| address routerAddress, | |
| address sell_token, | |
| address buy_token, | |
| uint256 amount | |
| ) internal view returns (uint256) { | |
| address[] memory pairs = new address[](2); | |
| pairs[0] = sell_token; | |
| pairs[1] = buy_token; | |
| uint256 price = IUniswapV2Router02(routerAddress).getAmountsOut( | |
| amount, | |
| pairs | |
| )[1]; | |
| return price; | |
| } | |
| //-------------------------------------------------------------------- | |
| // FLASHLOAN FUNCTIONS | |
| /** | |
| * @dev This function must be called only be the LENDING_POOL and takes care of repaying | |
| * active debt positions, migrating collateral and incurring new V2 debt token debt. | |
| * | |
| * @param assets The array of flash loaned assets used to repay debts. | |
| * @param amounts The array of flash loaned asset amounts used to repay debts. | |
| * @param premiums The array of premiums incurred as additional debts. | |
| * @param initiator The address that initiated the flash loan, unused. | |
| * @param params The byte array containing, in this case, the arrays of aTokens and aTokenAmounts. | |
| */ | |
| function executeOperation( | |
| address[] calldata assets, | |
| uint256[] calldata amounts, | |
| uint256[] calldata premiums, | |
| address initiator, | |
| bytes calldata params | |
| ) external override returns (bool) { | |
| // | |
| // Try to do arbitrage with the flashloan amount. | |
| // | |
| uint256 amountOut = simpleArbitrageFlashloan(amounts[0]); | |
| // At the end of your logic above, this contract owes | |
| // the flashloaned amounts + premiums. | |
| // Therefore ensure your contract has enough to repay | |
| // these amounts. | |
| uint256 amountOwing = 0; | |
| // Approve the LendingPool contract allowance to *pull* the owed amount | |
| for (uint256 i = 0; i < assets.length; i++) { | |
| amountOwing = amounts[i].add(premiums[i]); | |
| IERC20(assets[i]).approve(address(LENDING_POOL), amountOwing); | |
| } | |
| if(tokenA == address(0)) { | |
| address WETH = IUniswapV2Router02(exchangeA).WETH(); | |
| WBNB(WETH).withdraw(amountOut.sub(amountOwing)); | |
| payable(devAddr).transfer(amountOut.sub(amountOwing)); | |
| } else { | |
| IERC20(tokenA).transfer(devAddr, amountOut.sub(amountOwing)); | |
| } | |
| return true; | |
| } | |
| function flashloanArbitrage(uint256 _amountIn) public payable { | |
| address receiverAddress = address(this); | |
| uint256 amountIn = 0; | |
| address _tokenA; | |
| if(tokenA == address(0)) { | |
| address WETH = IUniswapV2Router02(exchangeA).WETH(); | |
| _tokenA = WETH; | |
| amountIn = msg.value; | |
| WBNB(WETH).deposit{value: amountIn}(); | |
| } else { | |
| _tokenA = tokenA; | |
| amountIn = _amountIn; | |
| } | |
| address[] memory assets = new address[](1); | |
| assets[0] = address(_tokenA); | |
| // assets[1] = address(_tokenB); | |
| uint256[] memory amounts = new uint256[](1); | |
| amounts[0] = amountIn; | |
| // amounts[0] = getERC20Balance(wethAddress); | |
| // 0 = no debt, 1 = stable, 2 = variable | |
| uint256[] memory modes = new uint256[](1); | |
| modes[0] = 0; | |
| // modes[1] = INSERT_ASSET_TWO_MODE; | |
| address onBehalfOf = address(this); | |
| bytes memory params = ""; | |
| uint16 referralCode = 0; | |
| LENDING_POOL.flashLoan( | |
| receiverAddress, | |
| assets, | |
| amounts, | |
| modes, | |
| onBehalfOf, | |
| params, | |
| referralCode | |
| ); | |
| } | |
| function getTokenBalance(address _erc20Address) | |
| public | |
| view | |
| returns (uint256) | |
| { | |
| return IERC20(_erc20Address).balanceOf(address(this)); | |
| } | |
| function getETHBalance() | |
| public | |
| view | |
| returns (uint256) | |
| { | |
| return address(this).balance; | |
| } | |
| function checkProbability(address _tokenA, address _tokenB, uint256 _amountIn) public view returns(string memory){ | |
| Exchange result = _comparePrice(_tokenA, _tokenB, _amountIn); | |
| if (result == Exchange.EXCA) { | |
| return "Arbitrage Chances in ExchangeA"; | |
| }else if(result == Exchange.EXCB){ | |
| return "Arbitrage Chances in ExchangeB"; | |
| }else{ | |
| return "No Availabe Arbitrage"; | |
| } | |
| } | |
| receive() external payable {} | |
| fallback() external payable { } | |
| } | |
| contract FlashLoanTriangularArbitrage is FlashLoanReceiverBase { | |
| //-------------------------------------------------------------------- | |
| // VARIABLES | |
| address public owner; | |
| address public exchangeA; | |
| address public exchangeB; | |
| address public tokenA; | |
| address public tokenB; | |
| address public tokenC; | |
| address public devAddr; | |
| enum Exchange { | |
| EXCA, | |
| EXCB, | |
| NONE | |
| } | |
| //-------------------------------------------------------------------- | |
| // MODIFIERS | |
| modifier onlyOwner() { | |
| require(devAddr == owner, "only owner can call this"); | |
| _; | |
| } | |
| //-------------------------------------------------------------------- | |
| // CONSTRUCTOR | |
| constructor( | |
| address _addressProvider, // 0x5E52dEc931FFb32f609681B8438A51c675cc232d | |
| address _exchangeA, // 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D | |
| address _exchangeB, // 0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506 | |
| address _tokenA, | |
| address _tokenB, | |
| address _tokenC, | |
| address _devAddr | |
| ) | |
| public | |
| FlashLoanReceiverBase(ILendingPoolAddressesProvider(_addressProvider)) | |
| { | |
| owner = devAddr; | |
| exchangeA = _exchangeA; | |
| exchangeB = _exchangeB; | |
| tokenA = _tokenA; | |
| tokenB = _tokenB; | |
| tokenC = _tokenC; | |
| devAddr = _devAddr; | |
| } | |
| //-------------------------------------------------------------------- | |
| // ARBITRAGE FUNCTIONS/LOGIC | |
| function withdrawERC(address _tokenAddress, uint256 amount) public onlyOwner { | |
| uint256 erc20Balance = getTokenBalance(_tokenAddress); | |
| require(amount <= erc20Balance, "Not enough balance"); | |
| IERC20(_tokenAddress).transfer(devAddr, amount); | |
| } | |
| function withdrawETH(uint256 amount) public onlyOwner { | |
| uint256 ethBalance = getETHBalance(); | |
| require(amount <= ethBalance, "Not enough balance"); | |
| payable(owner).transfer(amount); | |
| } | |
| function triangularArbitrage(uint256 _amountIn) public payable { | |
| // address WETH = IUniswapV2Router02(exchangeB).WETH(); | |
| uint256 amountIn = 0; | |
| if(tokenA == address(0)) { | |
| amountIn = msg.value; | |
| } else { | |
| amountIn = _amountIn; | |
| } | |
| uint256 amountOut = 0; | |
| uint256 amountOut_ = 0; | |
| uint256 _amountOut_ = 0; | |
| Exchange result = _comparePrice(tokenA, tokenB, amountIn); // loan amountIn | |
| if (result == Exchange.EXCA) { | |
| // sell loanToken in uniswap for swapToken with high price and buy loanToken from sushiswap with lower price | |
| amountOut = _swap( | |
| amountIn, | |
| exchangeA, | |
| tokenA, | |
| tokenB | |
| ); | |
| } else if (result == Exchange.EXCB) { | |
| // sell loanToken in sushiswap for swapToken with high price and buy loanToken from uniswap with lower price | |
| amountOut = _swap( | |
| amountIn, | |
| exchangeB, | |
| tokenA, | |
| tokenB | |
| ); | |
| } else { | |
| revert("No Arbitrage Found"); | |
| } | |
| Exchange result_ = _comparePrice(tokenB, tokenC, amountOut); // loan amountIn | |
| if (result_ == Exchange.EXCA) { | |
| // sell loanToken in uniswap for swapToken with high price and buy loanToken from sushiswap with lower price | |
| amountOut_ = _swap( | |
| amountOut, | |
| exchangeA, | |
| tokenB, | |
| tokenC | |
| ); | |
| } else if (result_ == Exchange.EXCB) { | |
| // sell loanToken in sushiswap for swapToken with high price and buy loanToken from uniswap with lower price | |
| amountOut_ = _swap( | |
| amountOut, | |
| exchangeB, | |
| tokenB, | |
| tokenC | |
| ); | |
| } else { | |
| revert("No Arbitrage Found"); | |
| } | |
| Exchange _result_ = _comparePrice(tokenC, tokenA, amountOut_); // loan amountIn | |
| if (_result_ == Exchange.EXCA) { | |
| // sell loanToken in uniswap for swapToken with high price and buy loanToken from sushiswap with lower price | |
| _amountOut_ = _swap( | |
| amountOut_, | |
| exchangeA, | |
| tokenC, | |
| tokenA | |
| ); | |
| } else if (_result_ == Exchange.EXCB) { | |
| // sell loanToken in sushiswap for swapToken with high price and buy loanToken from uniswap with lower price | |
| _amountOut_ = _swap( | |
| amountOut_, | |
| exchangeB, | |
| tokenC, | |
| tokenA | |
| ); | |
| } else { | |
| revert("No Arbitrage Found"); | |
| } | |
| require(_amountOut_ > amountIn, "Trade Reverted, Arbitrage not profitable"); | |
| if(tokenA == address(0)) { | |
| payable(devAddr).transfer(_amountOut_); | |
| } else { | |
| IERC20(tokenA).transfer(devAddr, _amountOut_); | |
| } | |
| } | |
| function triangularArbitrageFlashloan(uint256 _amountIn) internal returns(uint256){ | |
| address WETH = IUniswapV2Router02(exchangeB).WETH(); | |
| // uint256 amountIn = 0; | |
| address _tokenA; | |
| if(tokenA == address(0)) { | |
| // amountIn = msg.value; | |
| _tokenA = WETH; | |
| } else { | |
| // amountIn = _amountIn; | |
| _tokenA = tokenA; | |
| } | |
| uint256 amountOut = 0; | |
| uint256 amountOut_ = 0; | |
| uint256 _amountOut_ = 0; | |
| Exchange result = _comparePrice(_tokenA, tokenB, _amountIn); // loan _amountIn | |
| if (result == Exchange.EXCA) { | |
| // sell loanToken in uniswap for swapToken with high price and buy loanToken from sushiswap with lower price | |
| amountOut = _swap( | |
| _amountIn, | |
| exchangeA, | |
| _tokenA, | |
| tokenB | |
| ); | |
| } else if (result == Exchange.EXCB) { | |
| // sell loanToken in sushiswap for swapToken with high price and buy loanToken from uniswap with lower price | |
| amountOut = _swap( | |
| _amountIn, | |
| exchangeB, | |
| _tokenA, | |
| tokenB | |
| ); | |
| } else { | |
| revert("No Arbitrage Found"); | |
| } | |
| Exchange result_ = _comparePrice(tokenB, tokenC, amountOut); // loan amountIn | |
| if (result_ == Exchange.EXCA) { | |
| // sell loanToken in uniswap for swapToken with high price and buy loanToken from sushiswap with lower price | |
| amountOut_ = _swap( | |
| amountOut, | |
| exchangeA, | |
| tokenB, | |
| tokenC | |
| ); | |
| } else if (result_ == Exchange.EXCB) { | |
| // sell loanToken in sushiswap for swapToken with high price and buy loanToken from uniswap with lower price | |
| amountOut_ = _swap( | |
| amountOut, | |
| exchangeB, | |
| tokenB, | |
| tokenC | |
| ); | |
| } else { | |
| revert("No Arbitrage Found"); | |
| } | |
| Exchange _result_ = _comparePrice(tokenC, _tokenA, amountOut_); // loan amountIn | |
| if (_result_ == Exchange.EXCA) { | |
| // sell loanToken in uniswap for swapToken with high price and buy loanToken from sushiswap with lower price | |
| _amountOut_ = _swap( | |
| amountOut_, | |
| exchangeA, | |
| tokenC, | |
| _tokenA | |
| ); | |
| } else if (_result_ == Exchange.EXCB) { | |
| // sell loanToken in sushiswap for swapToken with high price and buy loanToken from uniswap with lower price | |
| _amountOut_ = _swap( | |
| amountOut_, | |
| exchangeB, | |
| tokenC, | |
| _tokenA | |
| ); | |
| } else { | |
| revert("No Arbitrage Found"); | |
| } | |
| require(_amountOut_ > _amountIn, "Trade Reverted, Arbitrage not profitable"); | |
| return _amountOut_; | |
| } | |
| function _swap( | |
| uint256 amountIn, | |
| address routerAddress, | |
| address sell_token, | |
| address buy_token | |
| ) internal returns (uint256) { | |
| address WETH = IUniswapV2Router02(routerAddress).WETH(); | |
| if(sell_token == address(0)) { | |
| sell_token = WETH; | |
| // IERC20(sell_token).approve(routerAddress, amountIn); | |
| uint256 amountOutMin = (_getAmountOut( | |
| routerAddress, | |
| sell_token, | |
| buy_token, | |
| amountIn | |
| ) * 95) / 100; | |
| address[] memory path = new address[](2); | |
| path[0] = sell_token; | |
| path[1] = buy_token; | |
| uint256 amountOut = IUniswapV2Router02(routerAddress) | |
| .swapExactETHForTokens{value : amountIn}( | |
| amountOutMin, | |
| path, | |
| address(this), | |
| block.timestamp + 15 minutes | |
| )[1]; | |
| return amountOut; | |
| } else if(buy_token == address(0)) { | |
| buy_token = WETH; | |
| IERC20(sell_token).approve(routerAddress, amountIn); | |
| uint256 amountOutMin = (_getAmountOut( | |
| routerAddress, | |
| sell_token, | |
| buy_token, | |
| amountIn | |
| ) * 95) / 100; | |
| address[] memory path = new address[](2); | |
| path[0] = sell_token; | |
| path[1] = buy_token; | |
| uint256 amountOut = IUniswapV2Router02(routerAddress) | |
| .swapExactTokensForETH( | |
| amountIn, | |
| amountOutMin, | |
| path, | |
| address(this), | |
| block.timestamp + 15 minutes | |
| )[1]; | |
| return amountOut; | |
| } else { | |
| IERC20(sell_token).approve(routerAddress, amountIn); | |
| uint256 amountOutMin = (_getAmountOut( | |
| routerAddress, | |
| sell_token, | |
| buy_token, | |
| amountIn | |
| ) * 95) / 100; | |
| address[] memory path = new address[](2); | |
| path[0] = sell_token; | |
| path[1] = buy_token; | |
| uint256 amountOut = IUniswapV2Router02(routerAddress) | |
| .swapExactTokensForTokens( | |
| amountIn, | |
| amountOutMin, | |
| path, | |
| address(this), | |
| block.timestamp + 15 minutes | |
| )[1]; | |
| return amountOut; | |
| } | |
| } | |
| function _comparePrice(address _tokenA, address _tokenB, uint256 amount) internal view returns (Exchange) { | |
| // else if(tokenC == address(0)) tokenC = WETH; | |
| address WETH = IUniswapV2Router02(exchangeA).WETH(); | |
| if(_tokenA == address(0)) _tokenA = WETH; | |
| else if(_tokenB == address(0)) _tokenB = WETH; | |
| uint256 uniswapPrice = _getAmountOut( | |
| exchangeA, | |
| _tokenA, | |
| _tokenB, | |
| amount | |
| ); | |
| uint256 sushiswapPrice = _getAmountOut( | |
| exchangeB, | |
| _tokenA, | |
| _tokenB, | |
| amount | |
| ); | |
| // we try to sell ETH with higher price and buy it back with low price to make profit | |
| if (uniswapPrice > sushiswapPrice) { | |
| require( | |
| _checkIfArbitrageIsProfitable( | |
| amount, | |
| uniswapPrice, | |
| sushiswapPrice | |
| ), | |
| "Arbitrage not profitable" | |
| ); | |
| return Exchange.EXCA; | |
| } else if (uniswapPrice < sushiswapPrice) { | |
| require( | |
| _checkIfArbitrageIsProfitable( | |
| amount, | |
| sushiswapPrice, | |
| uniswapPrice | |
| ), | |
| "Arbitrage not profitable" | |
| ); | |
| return Exchange.EXCB; | |
| } else { | |
| return Exchange.NONE; | |
| } | |
| } | |
| function _checkIfArbitrageIsProfitable( | |
| uint256 amountIn, | |
| uint256 higherPrice, | |
| uint256 lowerPrice | |
| ) internal pure returns (bool) { | |
| // uniswap & sushiswap have 0.3% fee for every exchange | |
| // so gain made must be greater than 2 * 0.3% * arbitrage_amount | |
| // difference in ETH | |
| uint256 difference = ((higherPrice - lowerPrice) * 10**18) / | |
| higherPrice; | |
| uint256 payed_fee = (amountIn * 3) / 1000; | |
| if (difference > payed_fee) { | |
| return true; | |
| } else { | |
| return false; | |
| } | |
| } | |
| function _getAmountOut( | |
| address routerAddress, | |
| address sell_token, | |
| address buy_token, | |
| uint256 amount | |
| ) internal view returns (uint256) { | |
| address[] memory pairs = new address[](2); | |
| pairs[0] = sell_token; | |
| pairs[1] = buy_token; | |
| uint256 price = IUniswapV2Router02(routerAddress).getAmountsOut( | |
| amount, | |
| pairs | |
| )[1]; | |
| return price; | |
| } | |
| /** | |
| * @dev This function must be called only be the LENDING_POOL and takes care of repaying | |
| * active debt positions, migrating collateral and incurring new V2 debt token debt. | |
| * | |
| * @param assets The array of flash loaned assets used to repay debts. | |
| * @param amounts The array of flash loaned asset amounts used to repay debts. | |
| * @param premiums The array of premiums incurred as additional debts. | |
| * @param initiator The address that initiated the flash loan, unused. | |
| * @param params The byte array containing, in this case, the arrays of aTokens and aTokenAmounts. | |
| */ | |
| function executeOperation( | |
| address[] calldata assets, | |
| uint256[] calldata amounts, | |
| uint256[] calldata premiums, | |
| address initiator, | |
| bytes calldata params | |
| ) external override returns (bool) { | |
| // | |
| // Try to do arbitrage with the flashloan amount. | |
| // | |
| uint256 amountOut = triangularArbitrageFlashloan(amounts[0]); | |
| // At the end of your logic above, this contract owes | |
| // the flashloaned amounts + premiums. | |
| // Therefore ensure your contract has enough to repay | |
| // these amounts. | |
| uint256 amountOwing = 0; | |
| // Approve the LendingPool contract allowance to *pull* the owed amount | |
| for (uint256 i = 0; i < assets.length; i++) { | |
| amountOwing = amounts[i].add(premiums[i]); | |
| IERC20(assets[i]).approve(address(LENDING_POOL), amountOwing); | |
| } | |
| if(tokenA == address(0)) { | |
| address WETH = IUniswapV2Router02(exchangeA).WETH(); | |
| WBNB(WETH).withdraw(amountOut.sub(amountOwing)); | |
| payable(devAddr).transfer(amountOut.sub(amountOwing)); | |
| } else { | |
| IERC20(tokenA).transfer(devAddr, amountOut.sub(amountOwing)); | |
| } | |
| return true; | |
| } | |
| function flashloanArbitrage(uint256 _amountIn) public payable { | |
| address receiverAddress = address(this); | |
| uint256 amountIn = 0; | |
| address _tokenA; | |
| if(tokenA == address(0)) { | |
| address WETH = IUniswapV2Router02(exchangeA).WETH(); | |
| _tokenA = WETH; | |
| amountIn = msg.value; | |
| WBNB(WETH).deposit{value: amountIn}(); | |
| } else { | |
| _tokenA = tokenA; | |
| amountIn = _amountIn; | |
| } | |
| address[] memory assets = new address[](1); | |
| assets[0] = address(_tokenA); | |
| // assets[1] = address(_tokenB); | |
| // assets[2] = address(_tokenC); | |
| uint256[] memory amounts = new uint256[](1); | |
| amounts[0] = amountIn; | |
| // amounts[0] = getERC20Balance(wethAddress); | |
| // 0 = no debt, 1 = stable, 2 = variable | |
| uint256[] memory modes = new uint256[](1); | |
| modes[0] = 0; | |
| // modes[1] = INSERT_ASSET_TWO_MODE; | |
| address onBehalfOf = address(this); | |
| bytes memory params = ""; | |
| uint16 referralCode = 0; | |
| LENDING_POOL.flashLoan( | |
| receiverAddress, | |
| assets, | |
| amounts, | |
| modes, | |
| onBehalfOf, | |
| params, | |
| referralCode | |
| ); | |
| } | |
| function getTokenBalance(address _erc20Address) | |
| public | |
| view | |
| returns (uint256) | |
| { | |
| return IERC20(_erc20Address).balanceOf(address(this)); | |
| } | |
| function getETHBalance() | |
| public | |
| view | |
| returns (uint256) | |
| { | |
| return address(this).balance; | |
| } | |
| function checkProbability(address _tokenA, address _tokenB, uint256 _amountIn) public view returns(string memory){ | |
| Exchange result = _comparePrice(_tokenA, _tokenB, _amountIn); | |
| if (result == Exchange.EXCA) { | |
| return "Arbitrage Chances in ExchangeA"; | |
| }else if(result == Exchange.EXCB){ | |
| return "Arbitrage Chances in ExchangeB"; | |
| }else{ | |
| return "No Availabe Arbitrage"; | |
| } | |
| } | |
| receive() external payable {} | |
| fallback() external payable { } | |
| } | |
| contract ArbitrageMain is Ownable { | |
| using SafeMath for uint256; | |
| address public providerAddress = 0xB53C1a33016B2DC2fF3653530bfF1848a515c8c5; // Mainnet | |
| enum Exchange { | |
| EXCA, | |
| EXCB, | |
| NONE | |
| } | |
| event SimpleArbitrageDeployed(address user, address arbitrage); | |
| event SimpleFlashLoanArbitrageDeployed(address user, address arbitrage); | |
| event TriangularArbitrageDeployed(address user, address arbitrage); | |
| event TriangularFlashLoanArbitrageDeployed(address user, address arbitrage); | |
| constructor() public { | |
| } | |
| function modifyProviderAddress(address _providerAddress) external onlyOwner { | |
| providerAddress = _providerAddress; | |
| } | |
| function callSimpleArbitrage(address _user, address _exchangeA, address _exchangeB, address _tokenA, address _tokenB, uint256 _amountIn) public payable { | |
| address payable contractA = address(new FlashLoanSimpleArbitrage(providerAddress, _exchangeA, _exchangeB, _tokenA, _tokenB, _user)); | |
| uint256 amountIn; | |
| if(_tokenA == address(0)) { | |
| amountIn = msg.value; | |
| FlashLoanSimpleArbitrage(contractA).simpleArbitrage{value:amountIn}(0); | |
| } else { | |
| amountIn = _amountIn; | |
| IERC20(_tokenA).transferFrom(_user, address(this), amountIn); | |
| IERC20(_tokenA).transfer(contractA, amountIn); | |
| FlashLoanSimpleArbitrage(contractA).simpleArbitrage(amountIn); | |
| } | |
| // IERC20(_tokenA).approve(contractA, amountIn); | |
| // IERC20(_tokenB).approve(contractA, amountIn); | |
| emit SimpleArbitrageDeployed(_user, contractA); | |
| } | |
| function callSimpleFlashLoan(address _user, address _exchangeA, address _exchangeB, address _tokenA, address _tokenB, uint256 _amountIn) public payable { | |
| address payable contractA = address(new FlashLoanSimpleArbitrage(providerAddress, _exchangeA, _exchangeB, _tokenA, _tokenB, _user)); | |
| uint256 amountIn; | |
| if(_tokenA == address(0)) { | |
| amountIn = msg.value; | |
| FlashLoanSimpleArbitrage(contractA).flashloanArbitrage{value:amountIn}(0); | |
| } else { | |
| amountIn = _amountIn; | |
| FlashLoanSimpleArbitrage(contractA).flashloanArbitrage(amountIn); | |
| } | |
| emit SimpleFlashLoanArbitrageDeployed(_user, contractA); | |
| } | |
| function callTriangularArbitrage(address _user, address _exchangeA, address _exchangeB, address _tokenA, address _tokenB, address _tokenC, uint256 _amountIn) public payable { | |
| address payable contractA = address(new FlashLoanTriangularArbitrage(providerAddress, _exchangeA, _exchangeB, _tokenA, _tokenB, _tokenC, _user)); | |
| uint256 amountIn; | |
| if(_tokenA == address(0)) { | |
| amountIn = msg.value; | |
| FlashLoanTriangularArbitrage(contractA).triangularArbitrage{value:amountIn}(0); | |
| } else { | |
| amountIn = _amountIn; | |
| IERC20(_tokenA).transferFrom(_user, address(this), amountIn); | |
| IERC20(_tokenA).transfer(contractA, amountIn); | |
| FlashLoanTriangularArbitrage(contractA).triangularArbitrage(amountIn); | |
| } | |
| emit TriangularArbitrageDeployed(_user, contractA); | |
| } | |
| function callTriangularFlashLoan(address _user, address _exchangeA, address _exchangeB, address _tokenA, address _tokenB, address _tokenC, uint256 _amountIn) public payable { | |
| address payable contractA = address(new FlashLoanTriangularArbitrage(providerAddress, _exchangeA, _exchangeB, _tokenA, _tokenB, _tokenC, _user)); | |
| uint256 amountIn; | |
| if(_tokenA == address(0)) { | |
| amountIn = msg.value; | |
| FlashLoanTriangularArbitrage(contractA).flashloanArbitrage{value:amountIn}(0); | |
| } else { | |
| amountIn = _amountIn; | |
| FlashLoanTriangularArbitrage(contractA).flashloanArbitrage(amountIn); | |
| } | |
| emit TriangularFlashLoanArbitrageDeployed(_user, contractA); | |
| } | |
| function getTokenBalance(address _erc20Address) | |
| public | |
| view | |
| returns (uint256) | |
| { | |
| return IERC20(_erc20Address).balanceOf(address(this)); | |
| } | |
| function getETHBalance() | |
| public | |
| view | |
| returns (uint256) | |
| { | |
| return address(this).balance; | |
| } | |
| function withdrawERC(address _tokenAddress, uint256 amount) public onlyOwner { | |
| uint256 erc20Balance = getTokenBalance(_tokenAddress); | |
| require(amount <= erc20Balance, "Not enough balance"); | |
| IERC20(_tokenAddress).transfer(msg.sender, amount); | |
| } | |
| function withdrawETH(uint256 amount) public onlyOwner { | |
| uint256 ethBalance = getETHBalance(); | |
| require(amount <= ethBalance, "Not enough balance"); | |
| payable(owner).transfer(amount); | |
| } | |
| receive() external payable {} | |
| fallback() external payable { } | |
| } |