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Latest 25 from a total of 8,718 transactions
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Swap And Deposit | 21116529 | 1 hr ago | IN | 0 ETH | 0.00507972 | ||||
Swap And Deposit | 21116497 | 1 hr ago | IN | 0 ETH | 0.00570541 | ||||
Swap And Deposit | 21116492 | 1 hr ago | IN | 0 ETH | 0.006886 | ||||
Swap And Deposit | 21116484 | 1 hr ago | IN | 0 ETH | 0.00817126 | ||||
Swap And Deposit | 21116446 | 1 hr ago | IN | 0 ETH | 0.01063489 | ||||
Swap And Deposit | 21116300 | 2 hrs ago | IN | 0 ETH | 0.00575606 | ||||
Swap And Deposit | 21116214 | 2 hrs ago | IN | 0 ETH | 0.00539111 | ||||
Swap And Deposit | 21116126 | 2 hrs ago | IN | 0 ETH | 0.00388762 | ||||
Swap And Deposit | 21116074 | 3 hrs ago | IN | 0 ETH | 0.00611812 | ||||
Swap And Deposit | 21116053 | 3 hrs ago | IN | 0 ETH | 0.00512863 | ||||
Swap And Deposit | 21115920 | 3 hrs ago | IN | 0 ETH | 0.00509054 | ||||
Swap And Deposit | 21115575 | 4 hrs ago | IN | 0 ETH | 0.01001332 | ||||
Swap And Deposit | 21115430 | 5 hrs ago | IN | 0 ETH | 0.00576257 | ||||
Swap And Deposit | 21115355 | 5 hrs ago | IN | 0 ETH | 0.00794134 | ||||
Swap And Deposit | 21115319 | 5 hrs ago | IN | 0 ETH | 0.01188275 | ||||
Swap And Deposit | 21115287 | 5 hrs ago | IN | 0 ETH | 0.00975595 | ||||
Swap And Deposit | 21114937 | 6 hrs ago | IN | 0 ETH | 0.00659887 | ||||
Swap And Deposit | 21114653 | 7 hrs ago | IN | 0 ETH | 0.00420777 | ||||
Swap And Deposit | 21114588 | 8 hrs ago | IN | 0 ETH | 0.00480777 | ||||
Swap And Deposit | 21114507 | 8 hrs ago | IN | 0 ETH | 0.00387782 | ||||
Swap And Deposit | 21114467 | 8 hrs ago | IN | 0 ETH | 0.00411706 | ||||
Swap And Deposit | 21114441 | 8 hrs ago | IN | 0 ETH | 0.00373871 | ||||
Swap And Deposit | 21114431 | 8 hrs ago | IN | 0 ETH | 0.00424132 | ||||
Swap And Deposit | 21114426 | 8 hrs ago | IN | 0 ETH | 0.0038844 | ||||
Swap And Deposit | 21114423 | 8 hrs ago | IN | 0 ETH | 0.00350708 |
Latest 1 internal transaction
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17678214 | 481 days ago | Contract Creation | 0 ETH |
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Contract Name:
ParaSwapLiquiditySwapAdapter
Compiler Version
v0.8.10+commit.fc410830
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.10; import {IERC20Detailed} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/IERC20Detailed.sol'; import {IERC20WithPermit} from '@aave/core-v3/contracts/interfaces/IERC20WithPermit.sol'; import {IPoolAddressesProvider} from '@aave/core-v3/contracts/interfaces/IPoolAddressesProvider.sol'; import {SafeERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/SafeERC20.sol'; import {SafeMath} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/SafeMath.sol'; import {BaseParaSwapSellAdapter} from './BaseParaSwapSellAdapter.sol'; import {IParaSwapAugustusRegistry} from './interfaces/IParaSwapAugustusRegistry.sol'; import {IParaSwapAugustus} from './interfaces/IParaSwapAugustus.sol'; import {ReentrancyGuard} from '../../dependencies/openzeppelin/ReentrancyGuard.sol'; /** * @title ParaSwapLiquiditySwapAdapter * @notice Adapter to swap liquidity using ParaSwap. * @author Jason Raymond Bell */ contract ParaSwapLiquiditySwapAdapter is BaseParaSwapSellAdapter, ReentrancyGuard { using SafeMath for uint256; using SafeERC20 for IERC20Detailed; constructor( IPoolAddressesProvider addressesProvider, IParaSwapAugustusRegistry augustusRegistry, address owner ) BaseParaSwapSellAdapter(addressesProvider, augustusRegistry) { transferOwnership(owner); } /** * @dev Swaps the received reserve amount from the flash loan into the asset specified in the params. * The received funds from the swap are then deposited into the protocol on behalf of the user. * The user should give this contract allowance to pull the ATokens in order to withdraw the underlying asset and repay the flash loan. * @param asset The address of the flash-borrowed asset * @param amount The amount of the flash-borrowed asset * @param premium The fee of the flash-borrowed asset * @param initiator The address of the flashloan initiator * @param params The byte-encoded params passed when initiating the flashloan * @return True if the execution of the operation succeeds, false otherwise * address assetToSwapTo Address of the underlying asset to be swapped to and deposited * uint256 minAmountToReceive Min amount to be received from the swap * uint256 swapAllBalanceOffset Set to offset of fromAmount in Augustus calldata if wanting to swap all balance, otherwise 0 * bytes swapCalldata Calldata for ParaSwap's AugustusSwapper contract * address augustus Address of ParaSwap's AugustusSwapper contract * PermitSignature permitParams Struct containing the permit signatures, set to all zeroes if not used */ function executeOperation( address asset, uint256 amount, uint256 premium, address initiator, bytes calldata params ) external override nonReentrant returns (bool) { require(msg.sender == address(POOL), 'CALLER_MUST_BE_POOL'); uint256 flashLoanAmount = amount; uint256 premiumLocal = premium; address initiatorLocal = initiator; IERC20Detailed assetToSwapFrom = IERC20Detailed(asset); ( IERC20Detailed assetToSwapTo, uint256 minAmountToReceive, uint256 swapAllBalanceOffset, bytes memory swapCalldata, IParaSwapAugustus augustus, PermitSignature memory permitParams ) = abi.decode( params, (IERC20Detailed, uint256, uint256, bytes, IParaSwapAugustus, PermitSignature) ); _swapLiquidity( swapAllBalanceOffset, swapCalldata, augustus, permitParams, flashLoanAmount, premiumLocal, initiatorLocal, assetToSwapFrom, assetToSwapTo, minAmountToReceive ); return true; } /** * @dev Swaps an amount of an asset to another and deposits the new asset amount on behalf of the user without using a flash loan. * This method can be used when the temporary transfer of the collateral asset to this contract does not affect the user position. * The user should give this contract allowance to pull the ATokens in order to withdraw the underlying asset and perform the swap. * @param assetToSwapFrom Address of the underlying asset to be swapped from * @param assetToSwapTo Address of the underlying asset to be swapped to and deposited * @param amountToSwap Amount to be swapped, or maximum amount when swapping all balance * @param minAmountToReceive Minimum amount to be received from the swap * @param swapAllBalanceOffset Set to offset of fromAmount in Augustus calldata if wanting to swap all balance, otherwise 0 * @param swapCalldata Calldata for ParaSwap's AugustusSwapper contract * @param augustus Address of ParaSwap's AugustusSwapper contract * @param permitParams Struct containing the permit signatures, set to all zeroes if not used */ function swapAndDeposit( IERC20Detailed assetToSwapFrom, IERC20Detailed assetToSwapTo, uint256 amountToSwap, uint256 minAmountToReceive, uint256 swapAllBalanceOffset, bytes calldata swapCalldata, IParaSwapAugustus augustus, PermitSignature calldata permitParams ) external nonReentrant { IERC20WithPermit aToken = IERC20WithPermit( _getReserveData(address(assetToSwapFrom)).aTokenAddress ); if (swapAllBalanceOffset != 0) { uint256 balance = aToken.balanceOf(msg.sender); require(balance <= amountToSwap, 'INSUFFICIENT_AMOUNT_TO_SWAP'); amountToSwap = balance; } _pullATokenAndWithdraw( address(assetToSwapFrom), aToken, msg.sender, amountToSwap, permitParams ); uint256 amountReceived = _sellOnParaSwap( swapAllBalanceOffset, swapCalldata, augustus, assetToSwapFrom, assetToSwapTo, amountToSwap, minAmountToReceive ); assetToSwapTo.safeApprove(address(POOL), 0); assetToSwapTo.safeApprove(address(POOL), amountReceived); POOL.deposit(address(assetToSwapTo), amountReceived, msg.sender, 0); } /** * @dev Swaps an amount of an asset to another and deposits the funds on behalf of the initiator. * @param swapAllBalanceOffset Set to offset of fromAmount in Augustus calldata if wanting to swap all balance, otherwise 0 * @param swapCalldata Calldata for ParaSwap's AugustusSwapper contract * @param augustus Address of ParaSwap's AugustusSwapper contract * @param permitParams Struct containing the permit signatures, set to all zeroes if not used * @param flashLoanAmount Amount of the flash loan i.e. maximum amount to swap * @param premium Fee of the flash loan * @param initiator Account that initiated the flash loan * @param assetToSwapFrom Address of the underyling asset to be swapped from * @param assetToSwapTo Address of the underlying asset to be swapped to and deposited * @param minAmountToReceive Min amount to be received from the swap */ function _swapLiquidity( uint256 swapAllBalanceOffset, bytes memory swapCalldata, IParaSwapAugustus augustus, PermitSignature memory permitParams, uint256 flashLoanAmount, uint256 premium, address initiator, IERC20Detailed assetToSwapFrom, IERC20Detailed assetToSwapTo, uint256 minAmountToReceive ) internal { IERC20WithPermit aToken = IERC20WithPermit( _getReserveData(address(assetToSwapFrom)).aTokenAddress ); uint256 amountToSwap = flashLoanAmount; uint256 balance = aToken.balanceOf(initiator); if (swapAllBalanceOffset != 0) { uint256 balanceToSwap = balance.sub(premium); require(balanceToSwap <= amountToSwap, 'INSUFFICIENT_AMOUNT_TO_SWAP'); amountToSwap = balanceToSwap; } else { require(balance >= amountToSwap.add(premium), 'INSUFFICIENT_ATOKEN_BALANCE'); } uint256 amountReceived = _sellOnParaSwap( swapAllBalanceOffset, swapCalldata, augustus, assetToSwapFrom, assetToSwapTo, amountToSwap, minAmountToReceive ); assetToSwapTo.safeApprove(address(POOL), 0); assetToSwapTo.safeApprove(address(POOL), amountReceived); POOL.deposit(address(assetToSwapTo), amountReceived, initiator, 0); _pullATokenAndWithdraw( address(assetToSwapFrom), aToken, initiator, amountToSwap.add(premium), permitParams ); // Repay flash loan assetToSwapFrom.safeApprove(address(POOL), 0); assetToSwapFrom.safeApprove(address(POOL), flashLoanAmount.add(premium)); } }
// SPDX-License-Identifier: LGPL-3.0-or-later pragma solidity 0.8.10; import {IERC20} from '../../openzeppelin/contracts/IERC20.sol'; /// @title Gnosis Protocol v2 Safe ERC20 Transfer Library /// @author Gnosis Developers /// @dev Gas-efficient version of Openzeppelin's SafeERC20 contract. library GPv2SafeERC20 { /// @dev Wrapper around a call to the ERC20 function `transfer` that reverts /// also when the token returns `false`. function safeTransfer(IERC20 token, address to, uint256 value) internal { bytes4 selector_ = token.transfer.selector; // solhint-disable-next-line no-inline-assembly assembly { let freeMemoryPointer := mload(0x40) mstore(freeMemoryPointer, selector_) mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) mstore(add(freeMemoryPointer, 36), value) if iszero(call(gas(), token, 0, freeMemoryPointer, 68, 0, 0)) { returndatacopy(0, 0, returndatasize()) revert(0, returndatasize()) } } require(getLastTransferResult(token), 'GPv2: failed transfer'); } /// @dev Wrapper around a call to the ERC20 function `transferFrom` that /// reverts also when the token returns `false`. function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { bytes4 selector_ = token.transferFrom.selector; // solhint-disable-next-line no-inline-assembly assembly { let freeMemoryPointer := mload(0x40) mstore(freeMemoryPointer, selector_) mstore(add(freeMemoryPointer, 4), and(from, 0xffffffffffffffffffffffffffffffffffffffff)) mstore(add(freeMemoryPointer, 36), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) mstore(add(freeMemoryPointer, 68), value) if iszero(call(gas(), token, 0, freeMemoryPointer, 100, 0, 0)) { returndatacopy(0, 0, returndatasize()) revert(0, returndatasize()) } } require(getLastTransferResult(token), 'GPv2: failed transferFrom'); } /// @dev Verifies that the last return was a successful `transfer*` call. /// This is done by checking that the return data is either empty, or /// is a valid ABI encoded boolean. function getLastTransferResult(IERC20 token) private view returns (bool success) { // NOTE: Inspecting previous return data requires assembly. Note that // we write the return data to memory 0 in the case where the return // data size is 32, this is OK since the first 64 bytes of memory are // reserved by Solidy as a scratch space that can be used within // assembly blocks. // <https://docs.soliditylang.org/en/v0.7.6/internals/layout_in_memory.html> // solhint-disable-next-line no-inline-assembly assembly { /// @dev Revert with an ABI encoded Solidity error with a message /// that fits into 32-bytes. /// /// An ABI encoded Solidity error has the following memory layout: /// /// ------------+---------------------------------- /// byte range | value /// ------------+---------------------------------- /// 0x00..0x04 | selector("Error(string)") /// 0x04..0x24 | string offset (always 0x20) /// 0x24..0x44 | string length /// 0x44..0x64 | string value, padded to 32-bytes function revertWithMessage(length, message) { mstore(0x00, '\x08\xc3\x79\xa0') mstore(0x04, 0x20) mstore(0x24, length) mstore(0x44, message) revert(0x00, 0x64) } switch returndatasize() // Non-standard ERC20 transfer without return. case 0 { // NOTE: When the return data size is 0, verify that there // is code at the address. This is done in order to maintain // compatibility with Solidity calling conventions. // <https://docs.soliditylang.org/en/v0.7.6/control-structures.html#external-function-calls> if iszero(extcodesize(token)) { revertWithMessage(20, 'GPv2: not a contract') } success := 1 } // Standard ERC20 transfer returning boolean success value. case 32 { returndatacopy(0, 0, returndatasize()) // NOTE: For ABI encoding v1, any non-zero value is accepted // as `true` for a boolean. In order to stay compatible with // OpenZeppelin's `SafeERC20` library which is known to work // with the existing ERC20 implementation we care about, // make sure we return success for any non-zero return value // from the `transfer*` call. success := iszero(iszero(mload(0))) } default { revertWithMessage(31, 'GPv2: malformed transfer result') } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Address.sol) pragma solidity ^0.8.0; /** * @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) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @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'); (bool success, ) = recipient.call{value: amount}(''); require(success, 'Address: unable to send value, recipient may have reverted'); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, 'Address: low-level call failed'); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, 'Address: low-level call with value failed'); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, 'Address: insufficient balance for call'); require(isContract(target), 'Address: call to non-contract'); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data ) internal view returns (bytes memory) { return functionStaticCall(target, data, 'Address: low-level static call failed'); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), 'Address: static call to non-contract'); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, 'Address: low-level delegate call failed'); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), 'Address: delegate call to non-contract'); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.10; /* * @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 payable(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; } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.0; /** * @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); }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.10; import {IERC20} from './IERC20.sol'; interface IERC20Detailed is IERC20 { function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.10; import './Context.sol'; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), 'Ownable: caller is not the owner'); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), 'Ownable: new owner is the zero address'); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import './IERC20.sol'; import './Address.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 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) ); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' 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 safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn( token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance) ); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, 'SafeERC20: decreased allowance below zero'); uint256 newAllowance = oldAllowance - value; _callOptionalReturn( token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance) ); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, 'SafeERC20: low-level call failed'); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), 'SafeERC20: ERC20 operation did not succeed'); } } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.10; /// @title Optimized overflow and underflow safe math operations /// @notice Contains methods for doing math operations that revert on overflow or underflow for minimal gas cost library SafeMath { /// @notice Returns x + y, reverts if sum overflows uint256 /// @param x The augend /// @param y The addend /// @return z The sum of x and y function add(uint256 x, uint256 y) internal pure returns (uint256 z) { unchecked { require((z = x + y) >= x); } } /// @notice Returns x - y, reverts if underflows /// @param x The minuend /// @param y The subtrahend /// @return z The difference of x and y function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { unchecked { require((z = x - y) <= x); } } /// @notice Returns x - y, reverts if underflows /// @param x The minuend /// @param y The subtrahend /// @param message The error msg /// @return z The difference of x and y function sub(uint256 x, uint256 y, string memory message) internal pure returns (uint256 z) { unchecked { require((z = x - y) <= x, message); } } /// @notice Returns x * y, reverts if overflows /// @param x The multiplicand /// @param y The multiplier /// @return z The product of x and y function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { unchecked { require(x == 0 || (z = x * y) / x == y); } } /// @notice Returns x / y, reverts if overflows - no specific check, solidity reverts on division by 0 /// @param x The numerator /// @param y The denominator /// @return z The product of x and y function div(uint256 x, uint256 y) internal pure returns (uint256 z) { return x / y; } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.10; import {IFlashLoanSimpleReceiver} from '../interfaces/IFlashLoanSimpleReceiver.sol'; import {IPoolAddressesProvider} from '../../interfaces/IPoolAddressesProvider.sol'; import {IPool} from '../../interfaces/IPool.sol'; /** * @title FlashLoanSimpleReceiverBase * @author Aave * @notice Base contract to develop a flashloan-receiver contract. */ abstract contract FlashLoanSimpleReceiverBase is IFlashLoanSimpleReceiver { IPoolAddressesProvider public immutable override ADDRESSES_PROVIDER; IPool public immutable override POOL; constructor(IPoolAddressesProvider provider) { ADDRESSES_PROVIDER = provider; POOL = IPool(provider.getPool()); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.0; import {IPoolAddressesProvider} from '../../interfaces/IPoolAddressesProvider.sol'; import {IPool} from '../../interfaces/IPool.sol'; /** * @title IFlashLoanSimpleReceiver * @author Aave * @notice Defines the basic interface of a flashloan-receiver contract. * @dev Implement this interface to develop a flashloan-compatible flashLoanReceiver contract */ interface IFlashLoanSimpleReceiver { /** * @notice Executes an operation after receiving the flash-borrowed asset * @dev Ensure that the contract can return the debt + premium, e.g., has * enough funds to repay and has approved the Pool to pull the total amount * @param asset The address of the flash-borrowed asset * @param amount The amount of the flash-borrowed asset * @param premium The fee of the flash-borrowed asset * @param initiator The address of the flashloan initiator * @param params The byte-encoded params passed when initiating the flashloan * @return True if the execution of the operation succeeds, false otherwise */ function executeOperation( address asset, uint256 amount, uint256 premium, address initiator, bytes calldata params ) external returns (bool); function ADDRESSES_PROVIDER() external view returns (IPoolAddressesProvider); function POOL() external view returns (IPool); }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.0; import {IERC20} from '../dependencies/openzeppelin/contracts/IERC20.sol'; /** * @title IERC20WithPermit * @author Aave * @notice Interface for the permit function (EIP-2612) */ interface IERC20WithPermit is IERC20 { /** * @notice Allow passing a signed message to approve spending * @dev implements the permit function as for * https://github.com/ethereum/EIPs/blob/8a34d644aacf0f9f8f00815307fd7dd5da07655f/EIPS/eip-2612.md * @param owner The owner of the funds * @param spender The spender * @param value The amount * @param deadline The deadline timestamp, type(uint256).max for max deadline * @param v Signature param * @param s Signature param * @param r Signature param */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.0; import {IPoolAddressesProvider} from './IPoolAddressesProvider.sol'; import {DataTypes} from '../protocol/libraries/types/DataTypes.sol'; /** * @title IPool * @author Aave * @notice Defines the basic interface for an Aave Pool. */ interface IPool { /** * @dev Emitted on mintUnbacked() * @param reserve The address of the underlying asset of the reserve * @param user The address initiating the supply * @param onBehalfOf The beneficiary of the supplied assets, receiving the aTokens * @param amount The amount of supplied assets * @param referralCode The referral code used */ event MintUnbacked( address indexed reserve, address user, address indexed onBehalfOf, uint256 amount, uint16 indexed referralCode ); /** * @dev Emitted on backUnbacked() * @param reserve The address of the underlying asset of the reserve * @param backer The address paying for the backing * @param amount The amount added as backing * @param fee The amount paid in fees */ event BackUnbacked(address indexed reserve, address indexed backer, uint256 amount, uint256 fee); /** * @dev Emitted on supply() * @param reserve The address of the underlying asset of the reserve * @param user The address initiating the supply * @param onBehalfOf The beneficiary of the supply, receiving the aTokens * @param amount The amount supplied * @param referralCode The referral code used */ event Supply( address indexed reserve, address user, address indexed onBehalfOf, uint256 amount, uint16 indexed referralCode ); /** * @dev Emitted on withdraw() * @param reserve The address of the underlying asset being withdrawn * @param user The address initiating the withdrawal, owner of aTokens * @param to The 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 interestRateMode The rate mode: 1 for Stable, 2 for Variable * @param borrowRate The numeric rate at which the user has borrowed, expressed in ray * @param referralCode The referral code used */ event Borrow( address indexed reserve, address user, address indexed onBehalfOf, uint256 amount, DataTypes.InterestRateMode interestRateMode, uint256 borrowRate, uint16 indexed referralCode ); /** * @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 * @param useATokens True if the repayment is done using aTokens, `false` if done with underlying asset directly */ event Repay( address indexed reserve, address indexed user, address indexed repayer, uint256 amount, bool useATokens ); /** * @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 interestRateMode The current interest rate mode of the position being swapped: 1 for Stable, 2 for Variable */ event SwapBorrowRateMode( address indexed reserve, address indexed user, DataTypes.InterestRateMode interestRateMode ); /** * @dev Emitted on borrow(), repay() and liquidationCall() when using isolated assets * @param asset The address of the underlying asset of the reserve * @param totalDebt The total isolation mode debt for the reserve */ event IsolationModeTotalDebtUpdated(address indexed asset, uint256 totalDebt); /** * @dev Emitted when the user selects a certain asset category for eMode * @param user The address of the user * @param categoryId The category id */ event UserEModeSet(address indexed user, uint8 categoryId); /** * @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 interestRateMode The flashloan mode: 0 for regular flashloan, 1 for Stable debt, 2 for Variable debt * @param premium The fee flash borrowed * @param referralCode The referral code used */ event FlashLoan( address indexed target, address initiator, address indexed asset, uint256 amount, DataTypes.InterestRateMode interestRateMode, uint256 premium, uint16 indexed referralCode ); /** * @dev Emitted when a borrower is liquidated. * @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 liquidator * @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. * @param reserve The address of the underlying asset of the reserve * @param liquidityRate The next liquidity rate * @param stableBorrowRate The next stable borrow rate * @param variableBorrowRate The next variable borrow rate * @param liquidityIndex The next liquidity index * @param variableBorrowIndex The next variable borrow index */ event ReserveDataUpdated( address indexed reserve, uint256 liquidityRate, uint256 stableBorrowRate, uint256 variableBorrowRate, uint256 liquidityIndex, uint256 variableBorrowIndex ); /** * @dev Emitted when the protocol treasury receives minted aTokens from the accrued interest. * @param reserve The address of the reserve * @param amountMinted The amount minted to the treasury */ event MintedToTreasury(address indexed reserve, uint256 amountMinted); /** * @notice Mints an `amount` of aTokens to the `onBehalfOf` * @param asset The address of the underlying asset to mint * @param amount The amount to mint * @param onBehalfOf The address that will receive the aTokens * @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 mintUnbacked( address asset, uint256 amount, address onBehalfOf, uint16 referralCode ) external; /** * @notice Back the current unbacked underlying with `amount` and pay `fee`. * @param asset The address of the underlying asset to back * @param amount The amount to back * @param fee The amount paid in fees * @return The backed amount */ function backUnbacked(address asset, uint256 amount, uint256 fee) external returns (uint256); /** * @notice Supplies an `amount` of underlying asset into the reserve, receiving in return overlying aTokens. * - E.g. User supplies 100 USDC and gets in return 100 aUSDC * @param asset The address of the underlying asset to supply * @param amount The amount to be supplied * @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 supply(address asset, uint256 amount, address onBehalfOf, uint16 referralCode) external; /** * @notice Supply with transfer approval of asset to be supplied done via permit function * see: https://eips.ethereum.org/EIPS/eip-2612 and https://eips.ethereum.org/EIPS/eip-713 * @param asset The address of the underlying asset to supply * @param amount The amount to be supplied * @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 deadline The deadline timestamp that the permit is valid * @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 permitV The V parameter of ERC712 permit sig * @param permitR The R parameter of ERC712 permit sig * @param permitS The S parameter of ERC712 permit sig */ function supplyWithPermit( address asset, uint256 amount, address onBehalfOf, uint16 referralCode, uint256 deadline, uint8 permitV, bytes32 permitR, bytes32 permitS ) external; /** * @notice 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 The 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); /** * @notice Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower * already supplied 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 The 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 The 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 interestRateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable * @param onBehalfOf The 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 interestRateMode, address onBehalfOf ) external returns (uint256); /** * @notice Repay with transfer approval of asset to be repaid done via permit function * see: https://eips.ethereum.org/EIPS/eip-2612 and https://eips.ethereum.org/EIPS/eip-713 * @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 interestRateMode 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 * @param deadline The deadline timestamp that the permit is valid * @param permitV The V parameter of ERC712 permit sig * @param permitR The R parameter of ERC712 permit sig * @param permitS The S parameter of ERC712 permit sig * @return The final amount repaid */ function repayWithPermit( address asset, uint256 amount, uint256 interestRateMode, address onBehalfOf, uint256 deadline, uint8 permitV, bytes32 permitR, bytes32 permitS ) external returns (uint256); /** * @notice Repays a borrowed `amount` on a specific reserve using the reserve aTokens, burning the * equivalent debt tokens * - E.g. User repays 100 USDC using 100 aUSDC, burning 100 variable/stable debt tokens * @dev Passing uint256.max as amount will clean up any residual aToken dust balance, if the user aToken * balance is not enough to cover the whole debt * @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 interestRateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable * @return The final amount repaid */ function repayWithATokens( address asset, uint256 amount, uint256 interestRateMode ) external returns (uint256); /** * @notice Allows a borrower to swap his debt between stable and variable mode, or vice versa * @param asset The address of the underlying asset borrowed * @param interestRateMode The current interest rate mode of the position being swapped: 1 for Stable, 2 for Variable */ function swapBorrowRateMode(address asset, uint256 interestRateMode) external; /** * @notice 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 supply APY is below REBALANCE_UP_THRESHOLD * maxVariableBorrowRate, which means that too * much has been borrowed at a stable rate and suppliers 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; /** * @notice Allows suppliers to enable/disable a specific supplied asset as collateral * @param asset The address of the underlying asset supplied * @param useAsCollateral True if the user wants to use the supply as collateral, false otherwise */ function setUserUseReserveAsCollateral(address asset, bool useAsCollateral) external; /** * @notice 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; /** * @notice Allows smartcontracts to access the liquidity of the pool within one transaction, * as long as the amount taken plus a fee is returned. * @dev IMPORTANT There are security concerns for developers of flashloan receiver contracts that must be kept * into consideration. For further details please visit https://docs.aave.com/developers/ * @param receiverAddress The address of the contract receiving the funds, implementing IFlashLoanReceiver interface * @param assets The addresses of the assets being flash-borrowed * @param amounts The amounts of the assets being flash-borrowed * @param interestRateModes 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 The 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 interestRateModes, address onBehalfOf, bytes calldata params, uint16 referralCode ) external; /** * @notice Allows smartcontracts to access the liquidity of the pool within one transaction, * as long as the amount taken plus a fee is returned. * @dev IMPORTANT There are security concerns for developers of flashloan receiver contracts that must be kept * into consideration. For further details please visit https://docs.aave.com/developers/ * @param receiverAddress The address of the contract receiving the funds, implementing IFlashLoanSimpleReceiver interface * @param asset The address of the asset being flash-borrowed * @param amount The amount of the asset being flash-borrowed * @param params Variadic packed params to pass to the receiver as extra information * @param referralCode The 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 flashLoanSimple( address receiverAddress, address asset, uint256 amount, bytes calldata params, uint16 referralCode ) external; /** * @notice Returns the user account data across all the reserves * @param user The address of the user * @return totalCollateralBase The total collateral of the user in the base currency used by the price feed * @return totalDebtBase The total debt of the user in the base currency used by the price feed * @return availableBorrowsBase The borrowing power left of the user in the base currency used by the price feed * @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 totalCollateralBase, uint256 totalDebtBase, uint256 availableBorrowsBase, uint256 currentLiquidationThreshold, uint256 ltv, uint256 healthFactor ); /** * @notice Initializes a reserve, activating it, assigning an aToken and debt tokens and an * interest rate strategy * @dev Only callable by the PoolConfigurator contract * @param asset The address of the underlying asset of the reserve * @param aTokenAddress The address of the aToken that will be assigned to the reserve * @param stableDebtAddress The address of the StableDebtToken that will be assigned to the reserve * @param variableDebtAddress The address of the VariableDebtToken that will be assigned to the reserve * @param interestRateStrategyAddress The address of the interest rate strategy contract */ function initReserve( address asset, address aTokenAddress, address stableDebtAddress, address variableDebtAddress, address interestRateStrategyAddress ) external; /** * @notice Drop a reserve * @dev Only callable by the PoolConfigurator contract * @param asset The address of the underlying asset of the reserve */ function dropReserve(address asset) external; /** * @notice Updates the address of the interest rate strategy contract * @dev Only callable by the PoolConfigurator contract * @param asset The address of the underlying asset of the reserve * @param rateStrategyAddress The address of the interest rate strategy contract */ function setReserveInterestRateStrategyAddress( address asset, address rateStrategyAddress ) external; /** * @notice Sets the configuration bitmap of the reserve as a whole * @dev Only callable by the PoolConfigurator contract * @param asset The address of the underlying asset of the reserve * @param configuration The new configuration bitmap */ function setConfiguration( address asset, DataTypes.ReserveConfigurationMap calldata configuration ) external; /** * @notice 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); /** * @notice 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); /** * @notice Returns the 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); /** * @notice Returns the normalized variable debt per unit of asset * @dev WARNING: This function is intended to be used primarily by the protocol itself to get a * "dynamic" variable index based on time, current stored index and virtual rate at the current * moment (approx. a borrower would get if opening a position). This means that is always used in * combination with variable debt supply/balances. * If using this function externally, consider that is possible to have an increasing normalized * variable debt that is not equivalent to how the variable debt index would be updated in storage * (e.g. only updates with non-zero variable debt supply) * @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); /** * @notice Returns the state and configuration of the reserve * @param asset The address of the underlying asset of the reserve * @return The state and configuration data of the reserve */ function getReserveData(address asset) external view returns (DataTypes.ReserveData memory); /** * @notice Validates and finalizes an aToken transfer * @dev Only callable by the overlying aToken of the `asset` * @param asset The address of the underlying asset of the aToken * @param from The user from which the aTokens are transferred * @param to The user receiving the aTokens * @param amount The amount being transferred/withdrawn * @param balanceFromBefore The aToken balance of the `from` user before the transfer * @param balanceToBefore The aToken balance of the `to` user before the transfer */ function finalizeTransfer( address asset, address from, address to, uint256 amount, uint256 balanceFromBefore, uint256 balanceToBefore ) external; /** * @notice Returns the list of the underlying assets of all the initialized reserves * @dev It does not include dropped reserves * @return The addresses of the underlying assets of the initialized reserves */ function getReservesList() external view returns (address[] memory); /** * @notice Returns the address of the underlying asset of a reserve by the reserve id as stored in the DataTypes.ReserveData struct * @param id The id of the reserve as stored in the DataTypes.ReserveData struct * @return The address of the reserve associated with id */ function getReserveAddressById(uint16 id) external view returns (address); /** * @notice Returns the PoolAddressesProvider connected to this contract * @return The address of the PoolAddressesProvider */ function ADDRESSES_PROVIDER() external view returns (IPoolAddressesProvider); /** * @notice Updates the protocol fee on the bridging * @param bridgeProtocolFee The part of the premium sent to the protocol treasury */ function updateBridgeProtocolFee(uint256 bridgeProtocolFee) external; /** * @notice Updates flash loan premiums. Flash loan premium consists of two parts: * - A part is sent to aToken holders as extra, one time accumulated interest * - A part is collected by the protocol treasury * @dev The total premium is calculated on the total borrowed amount * @dev The premium to protocol is calculated on the total premium, being a percentage of `flashLoanPremiumTotal` * @dev Only callable by the PoolConfigurator contract * @param flashLoanPremiumTotal The total premium, expressed in bps * @param flashLoanPremiumToProtocol The part of the premium sent to the protocol treasury, expressed in bps */ function updateFlashloanPremiums( uint128 flashLoanPremiumTotal, uint128 flashLoanPremiumToProtocol ) external; /** * @notice Configures a new category for the eMode. * @dev In eMode, the protocol allows very high borrowing power to borrow assets of the same category. * The category 0 is reserved as it's the default for volatile assets * @param id The id of the category * @param config The configuration of the category */ function configureEModeCategory(uint8 id, DataTypes.EModeCategory memory config) external; /** * @notice Returns the data of an eMode category * @param id The id of the category * @return The configuration data of the category */ function getEModeCategoryData(uint8 id) external view returns (DataTypes.EModeCategory memory); /** * @notice Allows a user to use the protocol in eMode * @param categoryId The id of the category */ function setUserEMode(uint8 categoryId) external; /** * @notice Returns the eMode the user is using * @param user The address of the user * @return The eMode id */ function getUserEMode(address user) external view returns (uint256); /** * @notice Resets the isolation mode total debt of the given asset to zero * @dev It requires the given asset has zero debt ceiling * @param asset The address of the underlying asset to reset the isolationModeTotalDebt */ function resetIsolationModeTotalDebt(address asset) external; /** * @notice Returns the percentage of available liquidity that can be borrowed at once at stable rate * @return The percentage of available liquidity to borrow, expressed in bps */ function MAX_STABLE_RATE_BORROW_SIZE_PERCENT() external view returns (uint256); /** * @notice Returns the total fee on flash loans * @return The total fee on flashloans */ function FLASHLOAN_PREMIUM_TOTAL() external view returns (uint128); /** * @notice Returns the part of the bridge fees sent to protocol * @return The bridge fee sent to the protocol treasury */ function BRIDGE_PROTOCOL_FEE() external view returns (uint256); /** * @notice Returns the part of the flashloan fees sent to protocol * @return The flashloan fee sent to the protocol treasury */ function FLASHLOAN_PREMIUM_TO_PROTOCOL() external view returns (uint128); /** * @notice Returns the maximum number of reserves supported to be listed in this Pool * @return The maximum number of reserves supported */ function MAX_NUMBER_RESERVES() external view returns (uint16); /** * @notice Mints the assets accrued through the reserve factor to the treasury in the form of aTokens * @param assets The list of reserves for which the minting needs to be executed */ function mintToTreasury(address[] calldata assets) external; /** * @notice Rescue and transfer tokens locked in this contract * @param token The address of the token * @param to The address of the recipient * @param amount The amount of token to transfer */ function rescueTokens(address token, address to, uint256 amount) external; /** * @notice Supplies an `amount` of underlying asset into the reserve, receiving in return overlying aTokens. * - E.g. User supplies 100 USDC and gets in return 100 aUSDC * @dev Deprecated: Use the `supply` function instead * @param asset The address of the underlying asset to supply * @param amount The amount to be supplied * @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; }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.0; /** * @title IPoolAddressesProvider * @author Aave * @notice Defines the basic interface for a Pool Addresses Provider. */ interface IPoolAddressesProvider { /** * @dev Emitted when the market identifier is updated. * @param oldMarketId The old id of the market * @param newMarketId The new id of the market */ event MarketIdSet(string indexed oldMarketId, string indexed newMarketId); /** * @dev Emitted when the pool is updated. * @param oldAddress The old address of the Pool * @param newAddress The new address of the Pool */ event PoolUpdated(address indexed oldAddress, address indexed newAddress); /** * @dev Emitted when the pool configurator is updated. * @param oldAddress The old address of the PoolConfigurator * @param newAddress The new address of the PoolConfigurator */ event PoolConfiguratorUpdated(address indexed oldAddress, address indexed newAddress); /** * @dev Emitted when the price oracle is updated. * @param oldAddress The old address of the PriceOracle * @param newAddress The new address of the PriceOracle */ event PriceOracleUpdated(address indexed oldAddress, address indexed newAddress); /** * @dev Emitted when the ACL manager is updated. * @param oldAddress The old address of the ACLManager * @param newAddress The new address of the ACLManager */ event ACLManagerUpdated(address indexed oldAddress, address indexed newAddress); /** * @dev Emitted when the ACL admin is updated. * @param oldAddress The old address of the ACLAdmin * @param newAddress The new address of the ACLAdmin */ event ACLAdminUpdated(address indexed oldAddress, address indexed newAddress); /** * @dev Emitted when the price oracle sentinel is updated. * @param oldAddress The old address of the PriceOracleSentinel * @param newAddress The new address of the PriceOracleSentinel */ event PriceOracleSentinelUpdated(address indexed oldAddress, address indexed newAddress); /** * @dev Emitted when the pool data provider is updated. * @param oldAddress The old address of the PoolDataProvider * @param newAddress The new address of the PoolDataProvider */ event PoolDataProviderUpdated(address indexed oldAddress, address indexed newAddress); /** * @dev Emitted when a new proxy is created. * @param id The identifier of the proxy * @param proxyAddress The address of the created proxy contract * @param implementationAddress The address of the implementation contract */ event ProxyCreated( bytes32 indexed id, address indexed proxyAddress, address indexed implementationAddress ); /** * @dev Emitted when a new non-proxied contract address is registered. * @param id The identifier of the contract * @param oldAddress The address of the old contract * @param newAddress The address of the new contract */ event AddressSet(bytes32 indexed id, address indexed oldAddress, address indexed newAddress); /** * @dev Emitted when the implementation of the proxy registered with id is updated * @param id The identifier of the contract * @param proxyAddress The address of the proxy contract * @param oldImplementationAddress The address of the old implementation contract * @param newImplementationAddress The address of the new implementation contract */ event AddressSetAsProxy( bytes32 indexed id, address indexed proxyAddress, address oldImplementationAddress, address indexed newImplementationAddress ); /** * @notice Returns the id of the Aave market to which this contract points to. * @return The market id */ function getMarketId() external view returns (string memory); /** * @notice Associates an id with a specific PoolAddressesProvider. * @dev This can be used to create an onchain registry of PoolAddressesProviders to * identify and validate multiple Aave markets. * @param newMarketId The market id */ function setMarketId(string calldata newMarketId) external; /** * @notice Returns an address by its identifier. * @dev The returned address might be an EOA or a contract, potentially proxied * @dev It returns ZERO if there is no registered address with the given id * @param id The id * @return The address of the registered for the specified id */ function getAddress(bytes32 id) external view returns (address); /** * @notice General function to update the implementation of a proxy registered with * certain `id`. If there is no proxy registered, it will instantiate one and * set as implementation the `newImplementationAddress`. * @dev IMPORTANT Use this function carefully, only for ids that don't have an explicit * setter function, in order to avoid unexpected consequences * @param id The id * @param newImplementationAddress The address of the new implementation */ function setAddressAsProxy(bytes32 id, address newImplementationAddress) external; /** * @notice Sets an address for an id replacing the address saved in the addresses map. * @dev IMPORTANT Use this function carefully, as it will do a hard replacement * @param id The id * @param newAddress The address to set */ function setAddress(bytes32 id, address newAddress) external; /** * @notice Returns the address of the Pool proxy. * @return The Pool proxy address */ function getPool() external view returns (address); /** * @notice Updates the implementation of the Pool, or creates a proxy * setting the new `pool` implementation when the function is called for the first time. * @param newPoolImpl The new Pool implementation */ function setPoolImpl(address newPoolImpl) external; /** * @notice Returns the address of the PoolConfigurator proxy. * @return The PoolConfigurator proxy address */ function getPoolConfigurator() external view returns (address); /** * @notice Updates the implementation of the PoolConfigurator, or creates a proxy * setting the new `PoolConfigurator` implementation when the function is called for the first time. * @param newPoolConfiguratorImpl The new PoolConfigurator implementation */ function setPoolConfiguratorImpl(address newPoolConfiguratorImpl) external; /** * @notice Returns the address of the price oracle. * @return The address of the PriceOracle */ function getPriceOracle() external view returns (address); /** * @notice Updates the address of the price oracle. * @param newPriceOracle The address of the new PriceOracle */ function setPriceOracle(address newPriceOracle) external; /** * @notice Returns the address of the ACL manager. * @return The address of the ACLManager */ function getACLManager() external view returns (address); /** * @notice Updates the address of the ACL manager. * @param newAclManager The address of the new ACLManager */ function setACLManager(address newAclManager) external; /** * @notice Returns the address of the ACL admin. * @return The address of the ACL admin */ function getACLAdmin() external view returns (address); /** * @notice Updates the address of the ACL admin. * @param newAclAdmin The address of the new ACL admin */ function setACLAdmin(address newAclAdmin) external; /** * @notice Returns the address of the price oracle sentinel. * @return The address of the PriceOracleSentinel */ function getPriceOracleSentinel() external view returns (address); /** * @notice Updates the address of the price oracle sentinel. * @param newPriceOracleSentinel The address of the new PriceOracleSentinel */ function setPriceOracleSentinel(address newPriceOracleSentinel) external; /** * @notice Returns the address of the data provider. * @return The address of the DataProvider */ function getPoolDataProvider() external view returns (address); /** * @notice Updates the address of the data provider. * @param newDataProvider The address of the new DataProvider */ function setPoolDataProvider(address newDataProvider) external; }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.0; /** * @title IPriceOracleGetter * @author Aave * @notice Interface for the Aave price oracle. */ interface IPriceOracleGetter { /** * @notice Returns the base currency address * @dev Address 0x0 is reserved for USD as base currency. * @return Returns the base currency address. */ function BASE_CURRENCY() external view returns (address); /** * @notice Returns the base currency unit * @dev 1 ether for ETH, 1e8 for USD. * @return Returns the base currency unit. */ function BASE_CURRENCY_UNIT() external view returns (uint256); /** * @notice Returns the asset price in the base currency * @param asset The address of the asset * @return The price of the asset */ function getAssetPrice(address asset) external view returns (uint256); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.0; /** * @title PercentageMath library * @author Aave * @notice Provides functions to perform percentage calculations * @dev Percentages are defined by default with 2 decimals of precision (100.00). The precision is indicated by PERCENTAGE_FACTOR * @dev Operations are rounded. If a value is >=.5, will be rounded up, otherwise rounded down. */ library PercentageMath { // Maximum percentage factor (100.00%) uint256 internal constant PERCENTAGE_FACTOR = 1e4; // Half percentage factor (50.00%) uint256 internal constant HALF_PERCENTAGE_FACTOR = 0.5e4; /** * @notice Executes a percentage multiplication * @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328 * @param value The value of which the percentage needs to be calculated * @param percentage The percentage of the value to be calculated * @return result value percentmul percentage */ function percentMul(uint256 value, uint256 percentage) internal pure returns (uint256 result) { // to avoid overflow, value <= (type(uint256).max - HALF_PERCENTAGE_FACTOR) / percentage assembly { if iszero( or( iszero(percentage), iszero(gt(value, div(sub(not(0), HALF_PERCENTAGE_FACTOR), percentage))) ) ) { revert(0, 0) } result := div(add(mul(value, percentage), HALF_PERCENTAGE_FACTOR), PERCENTAGE_FACTOR) } } /** * @notice Executes a percentage division * @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328 * @param value The value of which the percentage needs to be calculated * @param percentage The percentage of the value to be calculated * @return result value percentdiv percentage */ function percentDiv(uint256 value, uint256 percentage) internal pure returns (uint256 result) { // to avoid overflow, value <= (type(uint256).max - halfPercentage) / PERCENTAGE_FACTOR assembly { if or( iszero(percentage), iszero(iszero(gt(value, div(sub(not(0), div(percentage, 2)), PERCENTAGE_FACTOR)))) ) { revert(0, 0) } result := div(add(mul(value, PERCENTAGE_FACTOR), div(percentage, 2)), percentage) } } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity ^0.8.0; library DataTypes { struct ReserveData { //stores the reserve configuration ReserveConfigurationMap configuration; //the liquidity index. Expressed in ray uint128 liquidityIndex; //the current supply rate. Expressed in ray uint128 currentLiquidityRate; //variable borrow index. Expressed in ray uint128 variableBorrowIndex; //the current variable borrow rate. Expressed in ray uint128 currentVariableBorrowRate; //the current stable borrow rate. Expressed in ray uint128 currentStableBorrowRate; //timestamp of last update uint40 lastUpdateTimestamp; //the id of the reserve. Represents the position in the list of the active reserves uint16 id; //aToken address address aTokenAddress; //stableDebtToken address address stableDebtTokenAddress; //variableDebtToken address address variableDebtTokenAddress; //address of the interest rate strategy address interestRateStrategyAddress; //the current treasury balance, scaled uint128 accruedToTreasury; //the outstanding unbacked aTokens minted through the bridging feature uint128 unbacked; //the outstanding debt borrowed against this asset in isolation mode uint128 isolationModeTotalDebt; } 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: asset is paused //bit 61: borrowing in isolation mode is enabled //bit 62: siloed borrowing enabled //bit 63: flashloaning enabled //bit 64-79: reserve factor //bit 80-115 borrow cap in whole tokens, borrowCap == 0 => no cap //bit 116-151 supply cap in whole tokens, supplyCap == 0 => no cap //bit 152-167 liquidation protocol fee //bit 168-175 eMode category //bit 176-211 unbacked mint cap in whole tokens, unbackedMintCap == 0 => minting disabled //bit 212-251 debt ceiling for isolation mode with (ReserveConfiguration::DEBT_CEILING_DECIMALS) decimals //bit 252-255 unused uint256 data; } struct UserConfigurationMap { /** * @dev Bitmap of the users collaterals and borrows. It is divided in pairs of bits, one pair per asset. * The first bit indicates if an asset is used as collateral by the user, the second whether an * asset is borrowed by the user. */ uint256 data; } struct EModeCategory { // each eMode category has a custom ltv and liquidation threshold uint16 ltv; uint16 liquidationThreshold; uint16 liquidationBonus; // each eMode category may or may not have a custom oracle to override the individual assets price oracles address priceSource; string label; } enum InterestRateMode {NONE, STABLE, VARIABLE} struct ReserveCache { uint256 currScaledVariableDebt; uint256 nextScaledVariableDebt; uint256 currPrincipalStableDebt; uint256 currAvgStableBorrowRate; uint256 currTotalStableDebt; uint256 nextAvgStableBorrowRate; uint256 nextTotalStableDebt; uint256 currLiquidityIndex; uint256 nextLiquidityIndex; uint256 currVariableBorrowIndex; uint256 nextVariableBorrowIndex; uint256 currLiquidityRate; uint256 currVariableBorrowRate; uint256 reserveFactor; ReserveConfigurationMap reserveConfiguration; address aTokenAddress; address stableDebtTokenAddress; address variableDebtTokenAddress; uint40 reserveLastUpdateTimestamp; uint40 stableDebtLastUpdateTimestamp; } struct ExecuteLiquidationCallParams { uint256 reservesCount; uint256 debtToCover; address collateralAsset; address debtAsset; address user; bool receiveAToken; address priceOracle; uint8 userEModeCategory; address priceOracleSentinel; } struct ExecuteSupplyParams { address asset; uint256 amount; address onBehalfOf; uint16 referralCode; } struct ExecuteBorrowParams { address asset; address user; address onBehalfOf; uint256 amount; InterestRateMode interestRateMode; uint16 referralCode; bool releaseUnderlying; uint256 maxStableRateBorrowSizePercent; uint256 reservesCount; address oracle; uint8 userEModeCategory; address priceOracleSentinel; } struct ExecuteRepayParams { address asset; uint256 amount; InterestRateMode interestRateMode; address onBehalfOf; bool useATokens; } struct ExecuteWithdrawParams { address asset; uint256 amount; address to; uint256 reservesCount; address oracle; uint8 userEModeCategory; } struct ExecuteSetUserEModeParams { uint256 reservesCount; address oracle; uint8 categoryId; } struct FinalizeTransferParams { address asset; address from; address to; uint256 amount; uint256 balanceFromBefore; uint256 balanceToBefore; uint256 reservesCount; address oracle; uint8 fromEModeCategory; } struct FlashloanParams { address receiverAddress; address[] assets; uint256[] amounts; uint256[] interestRateModes; address onBehalfOf; bytes params; uint16 referralCode; uint256 flashLoanPremiumToProtocol; uint256 flashLoanPremiumTotal; uint256 maxStableRateBorrowSizePercent; uint256 reservesCount; address addressesProvider; uint8 userEModeCategory; bool isAuthorizedFlashBorrower; } struct FlashloanSimpleParams { address receiverAddress; address asset; uint256 amount; bytes params; uint16 referralCode; uint256 flashLoanPremiumToProtocol; uint256 flashLoanPremiumTotal; } struct FlashLoanRepaymentParams { uint256 amount; uint256 totalPremium; uint256 flashLoanPremiumToProtocol; address asset; address receiverAddress; uint16 referralCode; } struct CalculateUserAccountDataParams { UserConfigurationMap userConfig; uint256 reservesCount; address user; address oracle; uint8 userEModeCategory; } struct ValidateBorrowParams { ReserveCache reserveCache; UserConfigurationMap userConfig; address asset; address userAddress; uint256 amount; InterestRateMode interestRateMode; uint256 maxStableLoanPercent; uint256 reservesCount; address oracle; uint8 userEModeCategory; address priceOracleSentinel; bool isolationModeActive; address isolationModeCollateralAddress; uint256 isolationModeDebtCeiling; } struct ValidateLiquidationCallParams { ReserveCache debtReserveCache; uint256 totalDebt; uint256 healthFactor; address priceOracleSentinel; } struct CalculateInterestRatesParams { uint256 unbacked; uint256 liquidityAdded; uint256 liquidityTaken; uint256 totalStableDebt; uint256 totalVariableDebt; uint256 averageStableBorrowRate; uint256 reserveFactor; address reserve; address aToken; } struct InitReserveParams { address asset; address aTokenAddress; address stableDebtAddress; address variableDebtAddress; address interestRateStrategyAddress; uint16 reservesCount; uint16 maxNumberReserves; } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.10; import {DataTypes} from '@aave/core-v3/contracts/protocol/libraries/types/DataTypes.sol'; import {FlashLoanSimpleReceiverBase} from '@aave/core-v3/contracts/flashloan/base/FlashLoanSimpleReceiverBase.sol'; import {GPv2SafeERC20} from '@aave/core-v3/contracts/dependencies/gnosis/contracts/GPv2SafeERC20.sol'; import {IERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/IERC20.sol'; import {IERC20Detailed} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/IERC20Detailed.sol'; import {IERC20WithPermit} from '@aave/core-v3/contracts/interfaces/IERC20WithPermit.sol'; import {IPoolAddressesProvider} from '@aave/core-v3/contracts/interfaces/IPoolAddressesProvider.sol'; import {IPriceOracleGetter} from '@aave/core-v3/contracts/interfaces/IPriceOracleGetter.sol'; import {SafeMath} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/SafeMath.sol'; import {Ownable} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/Ownable.sol'; /** * @title BaseParaSwapAdapter * @notice Utility functions for adapters using ParaSwap * @author Jason Raymond Bell */ abstract contract BaseParaSwapAdapter is FlashLoanSimpleReceiverBase, Ownable { using SafeMath for uint256; using GPv2SafeERC20 for IERC20; using GPv2SafeERC20 for IERC20Detailed; using GPv2SafeERC20 for IERC20WithPermit; struct PermitSignature { uint256 amount; uint256 deadline; uint8 v; bytes32 r; bytes32 s; } // Max slippage percent allowed uint256 public constant MAX_SLIPPAGE_PERCENT = 3000; // 30% IPriceOracleGetter public immutable ORACLE; event Swapped( address indexed fromAsset, address indexed toAsset, uint256 fromAmount, uint256 receivedAmount ); event Bought( address indexed fromAsset, address indexed toAsset, uint256 amountSold, uint256 receivedAmount ); constructor(IPoolAddressesProvider addressesProvider) FlashLoanSimpleReceiverBase(addressesProvider) { ORACLE = IPriceOracleGetter(addressesProvider.getPriceOracle()); } /** * @dev Get the price of the asset from the oracle denominated in eth * @param asset address * @return eth price for the asset */ function _getPrice(address asset) internal view returns (uint256) { return ORACLE.getAssetPrice(asset); } /** * @dev Get the decimals of an asset * @return number of decimals of the asset */ function _getDecimals(IERC20Detailed asset) internal view returns (uint8) { uint8 decimals = asset.decimals(); // Ensure 10**decimals won't overflow a uint256 require(decimals <= 77, 'TOO_MANY_DECIMALS_ON_TOKEN'); return decimals; } /** * @dev Get the aToken associated to the asset * @return address of the aToken */ function _getReserveData(address asset) internal view returns (DataTypes.ReserveData memory) { return POOL.getReserveData(asset); } function _pullATokenAndWithdraw( address reserve, address user, uint256 amount, PermitSignature memory permitSignature ) internal { IERC20WithPermit reserveAToken = IERC20WithPermit( _getReserveData(address(reserve)).aTokenAddress ); _pullATokenAndWithdraw(reserve, reserveAToken, user, amount, permitSignature); } /** * @dev Pull the ATokens from the user * @param reserve address of the asset * @param reserveAToken address of the aToken of the reserve * @param user address * @param amount of tokens to be transferred to the contract * @param permitSignature struct containing the permit signature */ function _pullATokenAndWithdraw( address reserve, IERC20WithPermit reserveAToken, address user, uint256 amount, PermitSignature memory permitSignature ) internal { // If deadline is set to zero, assume there is no signature for permit if (permitSignature.deadline != 0) { reserveAToken.permit( user, address(this), permitSignature.amount, permitSignature.deadline, permitSignature.v, permitSignature.r, permitSignature.s ); } // transfer from user to adapter reserveAToken.safeTransferFrom(user, address(this), amount); // withdraw reserve require(POOL.withdraw(reserve, amount, address(this)) == amount, 'UNEXPECTED_AMOUNT_WITHDRAWN'); } /** * @dev Emergency rescue for token stucked on this contract, as failsafe mechanism * - Funds should never remain in this contract more time than during transactions * - Only callable by the owner */ function rescueTokens(IERC20 token) external onlyOwner { token.safeTransfer(owner(), token.balanceOf(address(this))); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.10; import {SafeERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/SafeERC20.sol'; import {SafeMath} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/SafeMath.sol'; import {PercentageMath} from '@aave/core-v3/contracts/protocol/libraries/math/PercentageMath.sol'; import {IPoolAddressesProvider} from '@aave/core-v3/contracts/interfaces/IPoolAddressesProvider.sol'; import {IERC20Detailed} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/IERC20Detailed.sol'; import {IParaSwapAugustus} from './interfaces/IParaSwapAugustus.sol'; import {IParaSwapAugustusRegistry} from './interfaces/IParaSwapAugustusRegistry.sol'; import {BaseParaSwapAdapter} from './BaseParaSwapAdapter.sol'; /** * @title BaseParaSwapSellAdapter * @notice Implements the logic for selling tokens on ParaSwap * @author Jason Raymond Bell */ abstract contract BaseParaSwapSellAdapter is BaseParaSwapAdapter { using PercentageMath for uint256; using SafeMath for uint256; using SafeERC20 for IERC20Detailed; IParaSwapAugustusRegistry public immutable AUGUSTUS_REGISTRY; constructor(IPoolAddressesProvider addressesProvider, IParaSwapAugustusRegistry augustusRegistry) BaseParaSwapAdapter(addressesProvider) { // Do something on Augustus registry to check the right contract was passed require(!augustusRegistry.isValidAugustus(address(0))); AUGUSTUS_REGISTRY = augustusRegistry; } /** * @dev Swaps a token for another using ParaSwap * @param fromAmountOffset Offset of fromAmount in Augustus calldata if it should be overwritten, otherwise 0 * @param swapCalldata Calldata for ParaSwap's AugustusSwapper contract * @param augustus Address of ParaSwap's AugustusSwapper contract * @param assetToSwapFrom Address of the asset to be swapped from * @param assetToSwapTo Address of the asset to be swapped to * @param amountToSwap Amount to be swapped * @param minAmountToReceive Minimum amount to be received from the swap * @return amountReceived The amount received from the swap */ function _sellOnParaSwap( uint256 fromAmountOffset, bytes memory swapCalldata, IParaSwapAugustus augustus, IERC20Detailed assetToSwapFrom, IERC20Detailed assetToSwapTo, uint256 amountToSwap, uint256 minAmountToReceive ) internal returns (uint256 amountReceived) { require(AUGUSTUS_REGISTRY.isValidAugustus(address(augustus)), 'INVALID_AUGUSTUS'); { uint256 fromAssetDecimals = _getDecimals(assetToSwapFrom); uint256 toAssetDecimals = _getDecimals(assetToSwapTo); uint256 fromAssetPrice = _getPrice(address(assetToSwapFrom)); uint256 toAssetPrice = _getPrice(address(assetToSwapTo)); uint256 expectedMinAmountOut = amountToSwap .mul(fromAssetPrice.mul(10**toAssetDecimals)) .div(toAssetPrice.mul(10**fromAssetDecimals)) .percentMul(PercentageMath.PERCENTAGE_FACTOR - MAX_SLIPPAGE_PERCENT); require(expectedMinAmountOut <= minAmountToReceive, 'MIN_AMOUNT_EXCEEDS_MAX_SLIPPAGE'); } uint256 balanceBeforeAssetFrom = assetToSwapFrom.balanceOf(address(this)); require(balanceBeforeAssetFrom >= amountToSwap, 'INSUFFICIENT_BALANCE_BEFORE_SWAP'); uint256 balanceBeforeAssetTo = assetToSwapTo.balanceOf(address(this)); address tokenTransferProxy = augustus.getTokenTransferProxy(); assetToSwapFrom.safeApprove(tokenTransferProxy, 0); assetToSwapFrom.safeApprove(tokenTransferProxy, amountToSwap); if (fromAmountOffset != 0) { // Ensure 256 bit (32 bytes) fromAmount value is within bounds of the // calldata, not overlapping with the first 4 bytes (function selector). require( fromAmountOffset >= 4 && fromAmountOffset <= swapCalldata.length.sub(32), 'FROM_AMOUNT_OFFSET_OUT_OF_RANGE' ); // Overwrite the fromAmount with the correct amount for the swap. // In memory, swapCalldata consists of a 256 bit length field, followed by // the actual bytes data, that is why 32 is added to the byte offset. assembly { mstore(add(swapCalldata, add(fromAmountOffset, 32)), amountToSwap) } } (bool success, ) = address(augustus).call(swapCalldata); if (!success) { // Copy revert reason from call assembly { returndatacopy(0, 0, returndatasize()) revert(0, returndatasize()) } } require( assetToSwapFrom.balanceOf(address(this)) == balanceBeforeAssetFrom - amountToSwap, 'WRONG_BALANCE_AFTER_SWAP' ); amountReceived = assetToSwapTo.balanceOf(address(this)).sub(balanceBeforeAssetTo); require(amountReceived >= minAmountToReceive, 'INSUFFICIENT_AMOUNT_RECEIVED'); emit Swapped(address(assetToSwapFrom), address(assetToSwapTo), amountToSwap, amountReceived); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.10; interface IParaSwapAugustus { function getTokenTransferProxy() external view returns (address); }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.10; interface IParaSwapAugustusRegistry { function isValidAugustus(address augustus) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.10; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, 'ReentrancyGuard: reentrant call'); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
{ "evmVersion": "berlin", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 100000 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000002f39d218133afab8f2b819b1066c7e434ad94e9e000000000000000000000000a68bea62dc4034a689aa0f58a76681433caca663000000000000000000000000ee56e2b3d491590b5b31738cc34d5232f378a8d5
-----Decoded View---------------
Arg [0] : addressesProvider (address): 0x2f39d218133AFaB8F2B819B1066c7E434Ad94E9e
Arg [1] : augustusRegistry (address): 0xa68bEA62Dc4034A689AA0F58A76681433caCa663
Arg [2] : owner (address): 0xEE56e2B3D491590B5b31738cC34d5232F378a8D5
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000002f39d218133afab8f2b819b1066c7e434ad94e9e
Arg [1] : 000000000000000000000000a68bea62dc4034a689aa0f58a76681433caca663
Arg [2] : 000000000000000000000000ee56e2b3d491590b5b31738cc34d5232f378a8d5
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Multichain Portfolio | 30 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.