@b0dhidharma/yswaps/deployments/fantom/solcInputs/103fe0381f2366411e44059448d5f613.json

Yearn strategy swappers

{
  "language": "Solidity",
  "sources": {
    "contracts/utils/CollectableDustWithTokensManagement.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.4 <0.9.0;\n\nimport '@openzeppelin/contracts/token/ERC20/IERC20.sol';\nimport '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';\nimport '@lbertenasco/contract-utils/interfaces/utils/ICollectableDust.sol';\n\nimport '../libraries/CommonErrors.sol';\n\ninterface ICollectableDustWithTokensManagement is ICollectableDust {\n  error ManagingMoreThanBalance();\n  error SubtractingMoreThanManaged();\n  error TakingManagedFunds();\n}\n\nabstract contract CollectableDustWithTokensManagement is ICollectableDustWithTokensManagement {\n  using SafeERC20 for IERC20;\n\n  mapping(address => uint256) internal _tokensUnderManagement;\n\n  function _addTokenUnderManagement(address _token, uint256 _amount) internal {\n    if (_tokensUnderManagement[_token] + _amount > IERC20(_token).balanceOf(address(this))) revert ManagingMoreThanBalance();\n    _tokensUnderManagement[_token] += _amount;\n  }\n\n  function _subTokenUnderManagement(address _token, uint256 _amount) internal {\n    if (_tokensUnderManagement[_token] < _amount) revert SubtractingMoreThanManaged();\n    _tokensUnderManagement[_token] -= _amount;\n  }\n\n  function _sendDust(\n    address _to,\n    address _token,\n    uint256 _amount\n  ) internal {\n    if (_to == address(0)) revert CommonErrors.ZeroAddress();\n    if (_amount > IERC20(_token).balanceOf(address(this)) - _tokensUnderManagement[_token]) revert TakingManagedFunds();\n    IERC20(_token).safeTransfer(_to, _amount);\n    emit DustSent(_to, _token, _amount);\n  }\n}\n"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller's account to `recipient`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address recipient, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender's allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `sender` to `recipient` using the\n     * allowance mechanism. `amount` is then deducted from the caller's\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address sender,\n        address recipient,\n        uint256 amount\n    ) external returns (bool);\n\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n"
    },
    "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n    using Address for address;\n\n    function safeTransfer(\n        IERC20 token,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n    }\n\n    function safeTransferFrom(\n        IERC20 token,\n        address from,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n    }\n\n    /**\n     * @dev Deprecated. This function has issues similar to the ones found in\n     * {IERC20-approve}, and its usage is discouraged.\n     *\n     * Whenever possible, use {safeIncreaseAllowance} and\n     * {safeDecreaseAllowance} instead.\n     */\n    function safeApprove(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        // safeApprove should only be called when setting an initial allowance,\n        // or when resetting it to zero. To increase and decrease it, use\n        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n        require(\n            (value == 0) || (token.allowance(address(this), spender) == 0),\n            \"SafeERC20: approve from non-zero to non-zero allowance\"\n        );\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n    }\n\n    function safeIncreaseAllowance(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        uint256 newAllowance = token.allowance(address(this), spender) + value;\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n    }\n\n    function safeDecreaseAllowance(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        unchecked {\n            uint256 oldAllowance = token.allowance(address(this), spender);\n            require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n            uint256 newAllowance = oldAllowance - value;\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n        }\n    }\n\n    /**\n     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n     * on the return value: the return value is optional (but if data is returned, it must not be false).\n     * @param token The token targeted by the call.\n     * @param data The call data (encoded using abi.encode or one of its variants).\n     */\n    function _callOptionalReturn(IERC20 token, bytes memory data) private {\n        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n        // the target address contains contract code and also asserts for success in the low-level call.\n\n        bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n        if (returndata.length > 0) {\n            // Return data is optional\n            require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n        }\n    }\n}\n"
    },
    "@lbertenasco/contract-utils/interfaces/utils/ICollectableDust.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity 0.8.4;\n\ninterface ICollectableDust {\n  event DustSent(address _to, address token, uint256 amount);\n\n  function sendDust(address _to, address _token, uint256 _amount) external;\n}\n"
    },
    "contracts/libraries/CommonErrors.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.4 <0.9.0;\n\nlibrary CommonErrors {\n  error ZeroAddress();\n  error NotAuthorized();\n  error ZeroAmount();\n  error ZeroSlippage();\n  error IncorrectSwapInformation();\n}\n"
    },
    "@openzeppelin/contracts/utils/Address.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize, which returns 0 for contracts in\n        // construction, since the code is only stored at the end of the\n        // constructor execution.\n\n        uint256 size;\n        assembly {\n            size := extcodesize(account)\n        }\n        return size > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(isContract(target), \"Address: delegate call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length > 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"
    },
    "@lbertenasco/contract-utils/contracts/utils/CollectableDust.sol": {
      "content": "\n// SPDX-License-Identifier: MIT\n\npragma solidity 0.8.4;\n\nimport '@openzeppelin/contracts/utils/structs/EnumerableSet.sol';\nimport '@openzeppelin/contracts/token/ERC20/IERC20.sol';\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\n\nimport '../../interfaces/utils/ICollectableDust.sol';\n\nabstract\ncontract CollectableDust is ICollectableDust {\n  using SafeERC20 for IERC20;\n  using EnumerableSet for EnumerableSet.AddressSet;\n\n  address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;\n  EnumerableSet.AddressSet internal protocolTokens;\n\n  constructor() {}\n\n  function _addProtocolToken(address _token) internal {\n    require(!protocolTokens.contains(_token), 'collectable-dust/token-is-part-of-the-protocol');\n    protocolTokens.add(_token);\n  }\n\n  function _removeProtocolToken(address _token) internal {\n    require(protocolTokens.contains(_token), 'collectable-dust/token-not-part-of-the-protocol');\n    protocolTokens.remove(_token);\n  }\n\n  function _sendDust(\n    address _to,\n    address _token,\n    uint256 _amount\n  ) internal {\n    require(_to != address(0), 'collectable-dust/cant-send-dust-to-zero-address');\n    require(!protocolTokens.contains(_token), 'collectable-dust/token-is-part-of-the-protocol');\n    if (_token == ETH_ADDRESS) {\n      payable(_to).transfer(_amount);\n    } else {\n      IERC20(_token).safeTransfer(_to, _amount);\n    }\n    emit DustSent(_to, _token, _amount);\n  }\n}\n"
    },
    "@openzeppelin/contracts/utils/structs/EnumerableSet.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Library for managing\n * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive\n * types.\n *\n * Sets have the following properties:\n *\n * - Elements are added, removed, and checked for existence in constant time\n * (O(1)).\n * - Elements are enumerated in O(n). No guarantees are made on the ordering.\n *\n * ```\n * contract Example {\n *     // Add the library methods\n *     using EnumerableSet for EnumerableSet.AddressSet;\n *\n *     // Declare a set state variable\n *     EnumerableSet.AddressSet private mySet;\n * }\n * ```\n *\n * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)\n * and `uint256` (`UintSet`) are supported.\n */\nlibrary EnumerableSet {\n    // To implement this library for multiple types with as little code\n    // repetition as possible, we write it in terms of a generic Set type with\n    // bytes32 values.\n    // The Set implementation uses private functions, and user-facing\n    // implementations (such as AddressSet) are just wrappers around the\n    // underlying Set.\n    // This means that we can only create new EnumerableSets for types that fit\n    // in bytes32.\n\n    struct Set {\n        // Storage of set values\n        bytes32[] _values;\n        // Position of the value in the `values` array, plus 1 because index 0\n        // means a value is not in the set.\n        mapping(bytes32 => uint256) _indexes;\n    }\n\n    /**\n     * @dev Add a value to a set. O(1).\n     *\n     * Returns true if the value was added to the set, that is if it was not\n     * already present.\n     */\n    function _add(Set storage set, bytes32 value) private returns (bool) {\n        if (!_contains(set, value)) {\n            set._values.push(value);\n            // The value is stored at length-1, but we add 1 to all indexes\n            // and use 0 as a sentinel value\n            set._indexes[value] = set._values.length;\n            return true;\n        } else {\n            return false;\n        }\n    }\n\n    /**\n     * @dev Removes a value from a set. O(1).\n     *\n     * Returns true if the value was removed from the set, that is if it was\n     * present.\n     */\n    function _remove(Set storage set, bytes32 value) private returns (bool) {\n        // We read and store the value's index to prevent multiple reads from the same storage slot\n        uint256 valueIndex = set._indexes[value];\n\n        if (valueIndex != 0) {\n            // Equivalent to contains(set, value)\n            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in\n            // the array, and then remove the last element (sometimes called as 'swap and pop').\n            // This modifies the order of the array, as noted in {at}.\n\n            uint256 toDeleteIndex = valueIndex - 1;\n            uint256 lastIndex = set._values.length - 1;\n\n            if (lastIndex != toDeleteIndex) {\n                bytes32 lastvalue = set._values[lastIndex];\n\n                // Move the last value to the index where the value to delete is\n                set._values[toDeleteIndex] = lastvalue;\n                // Update the index for the moved value\n                set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex\n            }\n\n            // Delete the slot where the moved value was stored\n            set._values.pop();\n\n            // Delete the index for the deleted slot\n            delete set._indexes[value];\n\n            return true;\n        } else {\n            return false;\n        }\n    }\n\n    /**\n     * @dev Returns true if the value is in the set. O(1).\n     */\n    function _contains(Set storage set, bytes32 value) private view returns (bool) {\n        return set._indexes[value] != 0;\n    }\n\n    /**\n     * @dev Returns the number of values on the set. O(1).\n     */\n    function _length(Set storage set) private view returns (uint256) {\n        return set._values.length;\n    }\n\n    /**\n     * @dev Returns the value stored at position `index` in the set. O(1).\n     *\n     * Note that there are no guarantees on the ordering of values inside the\n     * array, and it may change when more values are added or removed.\n     *\n     * Requirements:\n     *\n     * - `index` must be strictly less than {length}.\n     */\n    function _at(Set storage set, uint256 index) private view returns (bytes32) {\n        return set._values[index];\n    }\n\n    /**\n     * @dev Return the entire set in an array\n     *\n     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\n     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\n     * this function has an unbounded cost, and using it as part of a state-changing function may render the function\n     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\n     */\n    function _values(Set storage set) private view returns (bytes32[] memory) {\n        return set._values;\n    }\n\n    // Bytes32Set\n\n    struct Bytes32Set {\n        Set _inner;\n    }\n\n    /**\n     * @dev Add a value to a set. O(1).\n     *\n     * Returns true if the value was added to the set, that is if it was not\n     * already present.\n     */\n    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {\n        return _add(set._inner, value);\n    }\n\n    /**\n     * @dev Removes a value from a set. O(1).\n     *\n     * Returns true if the value was removed from the set, that is if it was\n     * present.\n     */\n    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {\n        return _remove(set._inner, value);\n    }\n\n    /**\n     * @dev Returns true if the value is in the set. O(1).\n     */\n    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {\n        return _contains(set._inner, value);\n    }\n\n    /**\n     * @dev Returns the number of values in the set. O(1).\n     */\n    function length(Bytes32Set storage set) internal view returns (uint256) {\n        return _length(set._inner);\n    }\n\n    /**\n     * @dev Returns the value stored at position `index` in the set. O(1).\n     *\n     * Note that there are no guarantees on the ordering of values inside the\n     * array, and it may change when more values are added or removed.\n     *\n     * Requirements:\n     *\n     * - `index` must be strictly less than {length}.\n     */\n    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {\n        return _at(set._inner, index);\n    }\n\n    /**\n     * @dev Return the entire set in an array\n     *\n     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\n     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\n     * this function has an unbounded cost, and using it as part of a state-changing function may render the function\n     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\n     */\n    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {\n        return _values(set._inner);\n    }\n\n    // AddressSet\n\n    struct AddressSet {\n        Set _inner;\n    }\n\n    /**\n     * @dev Add a value to a set. O(1).\n     *\n     * Returns true if the value was added to the set, that is if it was not\n     * already present.\n     */\n    function add(AddressSet storage set, address value) internal returns (bool) {\n        return _add(set._inner, bytes32(uint256(uint160(value))));\n    }\n\n    /**\n     * @dev Removes a value from a set. O(1).\n     *\n     * Returns true if the value was removed from the set, that is if it was\n     * present.\n     */\n    function remove(AddressSet storage set, address value) internal returns (bool) {\n        return _remove(set._inner, bytes32(uint256(uint160(value))));\n    }\n\n    /**\n     * @dev Returns true if the value is in the set. O(1).\n     */\n    function contains(AddressSet storage set, address value) internal view returns (bool) {\n        return _contains(set._inner, bytes32(uint256(uint160(value))));\n    }\n\n    /**\n     * @dev Returns the number of values in the set. O(1).\n     */\n    function length(AddressSet storage set) internal view returns (uint256) {\n        return _length(set._inner);\n    }\n\n    /**\n     * @dev Returns the value stored at position `index` in the set. O(1).\n     *\n     * Note that there are no guarantees on the ordering of values inside the\n     * array, and it may change when more values are added or removed.\n     *\n     * Requirements:\n     *\n     * - `index` must be strictly less than {length}.\n     */\n    function at(AddressSet storage set, uint256 index) internal view returns (address) {\n        return address(uint160(uint256(_at(set._inner, index))));\n    }\n\n    /**\n     * @dev Return the entire set in an array\n     *\n     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\n     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\n     * this function has an unbounded cost, and using it as part of a state-changing function may render the function\n     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\n     */\n    function values(AddressSet storage set) internal view returns (address[] memory) {\n        bytes32[] memory store = _values(set._inner);\n        address[] memory result;\n\n        assembly {\n            result := store\n        }\n\n        return result;\n    }\n\n    // UintSet\n\n    struct UintSet {\n        Set _inner;\n    }\n\n    /**\n     * @dev Add a value to a set. O(1).\n     *\n     * Returns true if the value was added to the set, that is if it was not\n     * already present.\n     */\n    function add(UintSet storage set, uint256 value) internal returns (bool) {\n        return _add(set._inner, bytes32(value));\n    }\n\n    /**\n     * @dev Removes a value from a set. O(1).\n     *\n     * Returns true if the value was removed from the set, that is if it was\n     * present.\n     */\n    function remove(UintSet storage set, uint256 value) internal returns (bool) {\n        return _remove(set._inner, bytes32(value));\n    }\n\n    /**\n     * @dev Returns true if the value is in the set. O(1).\n     */\n    function contains(UintSet storage set, uint256 value) internal view returns (bool) {\n        return _contains(set._inner, bytes32(value));\n    }\n\n    /**\n     * @dev Returns the number of values on the set. O(1).\n     */\n    function length(UintSet storage set) internal view returns (uint256) {\n        return _length(set._inner);\n    }\n\n    /**\n     * @dev Returns the value stored at position `index` in the set. O(1).\n     *\n     * Note that there are no guarantees on the ordering of values inside the\n     * array, and it may change when more values are added or removed.\n     *\n     * Requirements:\n     *\n     * - `index` must be strictly less than {length}.\n     */\n    function at(UintSet storage set, uint256 index) internal view returns (uint256) {\n        return uint256(_at(set._inner, index));\n    }\n\n    /**\n     * @dev Return the entire set in an array\n     *\n     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed\n     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that\n     * this function has an unbounded cost, and using it as part of a state-changing function may render the function\n     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.\n     */\n    function values(UintSet storage set) internal view returns (uint256[] memory) {\n        bytes32[] memory store = _values(set._inner);\n        uint256[] memory result;\n\n        assembly {\n            result := store\n        }\n\n        return result;\n    }\n}\n"
    },
    "contracts/TradeFactory/TradeFactory.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.4 <0.9.0;\n\nimport '@lbertenasco/contract-utils/contracts/utils/CollectableDust.sol';\n\nimport './TradeFactoryPositionsHandler.sol';\nimport './TradeFactoryExecutor.sol';\n\ninterface ITradeFactory is ITradeFactoryExecutor, ITradeFactoryPositionsHandler {}\n\ncontract TradeFactory is TradeFactoryExecutor, CollectableDust, ITradeFactory {\n  constructor(\n    address _masterAdmin,\n    address _swapperAdder,\n    address _swapperSetter,\n    address _strategyAdder,\n    address _tradesModifier,\n    address _tradesSettler,\n    address _mechanicsRegistry\n  )\n    TradeFactoryAccessManager(_masterAdmin)\n    TradeFactoryPositionsHandler(_strategyAdder, _tradesModifier)\n    TradeFactorySwapperHandler(_swapperAdder, _swapperSetter)\n    TradeFactoryExecutor(_tradesSettler, _mechanicsRegistry)\n  {}\n\n  // Collectable Dust\n  function sendDust(\n    address _to,\n    address _token,\n    uint256 _amount\n  ) external virtual override onlyRole(MASTER_ADMIN) {\n    _sendDust(_to, _token, _amount);\n  }\n}\n"
    },
    "contracts/TradeFactory/TradeFactoryPositionsHandler.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.4 <0.9.0;\n\nimport '@openzeppelin/contracts/utils/structs/EnumerableSet.sol';\nimport './TradeFactorySwapperHandler.sol';\nimport '../Swapper.sol';\n\ninterface ITradeFactoryPositionsHandler {\n  struct Trade {\n    uint256 _id;\n    address _strategy;\n    address _swapper;\n    address _tokenIn;\n    address _tokenOut;\n    uint256 _amountIn;\n    uint256 _maxSlippage;\n    uint256 _deadline;\n  }\n\n  event TradeCreated(\n    uint256 indexed _id,\n    address _strategy,\n    address _swapper,\n    address _tokenIn,\n    address _tokenOut,\n    uint256 _amountIn,\n    uint256 _maxSlippage,\n    uint256 _deadline\n  );\n\n  event TradesCanceled(address indexed _strategy, uint256[] _ids);\n\n  event TradesSwapperChanged(uint256[] _ids, address _newSwapper);\n\n  event TradesMerged(uint256 indexed _anchorTrade, uint256[] _ids);\n\n  error InvalidTrade();\n\n  error InvalidDeadline();\n\n  function pendingTradesById(uint256)\n    external\n    view\n    returns (\n      uint256 _id,\n      address _strategy,\n      address _swapper,\n      address _tokenIn,\n      address _tokenOut,\n      uint256 _amountIn,\n      uint256 _maxSlippage,\n      uint256 _deadline\n    );\n\n  function pendingTradesIds() external view returns (uint256[] memory _pendingIds);\n\n  function pendingTradesIds(address _strategy) external view returns (uint256[] memory _pendingIds);\n\n  function create(\n    address _tokenIn,\n    address _tokenOut,\n    uint256 _amountIn,\n    uint256 _maxSlippage,\n    uint256 _deadline\n  ) external returns (uint256 _id);\n\n  function cancelPendingTrades(uint256[] calldata _ids) external;\n\n  function changePendingTradesSwapper(uint256[] calldata _ids, address _swapper) external;\n\n  function mergePendingTrades(uint256 _anchorTradeId, uint256[] calldata _toMergeIds) external;\n}\n\nabstract contract TradeFactoryPositionsHandler is ITradeFactoryPositionsHandler, TradeFactorySwapperHandler {\n  using EnumerableSet for EnumerableSet.UintSet;\n  using EnumerableSet for EnumerableSet.AddressSet;\n\n  bytes32 public constant STRATEGY = keccak256('STRATEGY');\n  bytes32 public constant STRATEGY_ADDER = keccak256('STRATEGY_ADDER');\n  bytes32 public constant TRADES_MODIFIER = keccak256('TRADES_MODIFIER');\n\n  uint256 private _tradeCounter = 1;\n\n  mapping(uint256 => Trade) public override pendingTradesById;\n\n  EnumerableSet.UintSet internal _pendingTradesIds;\n\n  mapping(address => EnumerableSet.UintSet) internal _pendingTradesByOwner;\n\n  constructor(address _strategyAdder, address _tradesModifier) {\n    if (_strategyAdder == address(0) || _tradesModifier == address(0)) revert CommonErrors.ZeroAddress();\n    _setRoleAdmin(STRATEGY, STRATEGY_ADDER);\n    _setRoleAdmin(STRATEGY_ADDER, MASTER_ADMIN);\n    _setupRole(STRATEGY_ADDER, _strategyAdder);\n    _setRoleAdmin(TRADES_MODIFIER, MASTER_ADMIN);\n    _setupRole(TRADES_MODIFIER, _tradesModifier);\n  }\n\n  function pendingTradesIds() external view override returns (uint256[] memory _pendingIds) {\n    _pendingIds = _pendingTradesIds.values();\n  }\n\n  function pendingTradesIds(address _strategy) external view override returns (uint256[] memory _pendingIds) {\n    _pendingIds = _pendingTradesByOwner[_strategy].values();\n  }\n\n  function create(\n    address _tokenIn,\n    address _tokenOut,\n    uint256 _amountIn,\n    uint256 _maxSlippage,\n    uint256 _deadline\n  ) external override onlyRole(STRATEGY) returns (uint256 _id) {\n    if (strategyAsyncSwapper[msg.sender] == address(0)) revert InvalidSwapper();\n    if (_tokenIn == address(0) || _tokenOut == address(0)) revert CommonErrors.ZeroAddress();\n    if (_amountIn == 0) revert CommonErrors.ZeroAmount();\n    if (_maxSlippage == 0) revert CommonErrors.ZeroSlippage();\n    if (_deadline <= block.timestamp) revert InvalidDeadline();\n    _id = _tradeCounter;\n    Trade memory _trade = Trade(\n      _tradeCounter,\n      msg.sender,\n      strategyAsyncSwapper[msg.sender],\n      _tokenIn,\n      _tokenOut,\n      _amountIn,\n      _maxSlippage,\n      _deadline\n    );\n    pendingTradesById[_trade._id] = _trade;\n    _pendingTradesByOwner[msg.sender].add(_trade._id);\n    _pendingTradesIds.add(_trade._id);\n    _tradeCounter += 1;\n    emit TradeCreated(\n      _trade._id,\n      _trade._strategy,\n      _trade._swapper,\n      _trade._tokenIn,\n      _trade._tokenOut,\n      _trade._amountIn,\n      _trade._maxSlippage,\n      _trade._deadline\n    );\n  }\n\n  function cancelPendingTrades(uint256[] calldata _ids) external override onlyRole(STRATEGY) {\n    for (uint256 i; i < _ids.length; i++) {\n      if (!_pendingTradesIds.contains(_ids[i])) revert InvalidTrade();\n      if (pendingTradesById[_ids[i]]._strategy != msg.sender) revert CommonErrors.NotAuthorized();\n      _removePendingTrade(msg.sender, _ids[i]);\n    }\n    emit TradesCanceled(msg.sender, _ids);\n  }\n\n  // onlyStrategyHandler or master admin ?\n  function changePendingTradesSwapper(uint256[] calldata _ids, address _swapper) external override onlyRole(TRADES_MODIFIER) {\n    if (ISwapper(_swapper).SWAPPER_TYPE() != ISwapper.SwapperType.ASYNC) revert NotAsyncSwapper();\n    if (!_swappers.contains(_swapper)) revert InvalidSwapper();\n    for (uint256 i; i < _ids.length; i++) {\n      if (!_pendingTradesIds.contains(_ids[i])) revert InvalidTrade();\n      pendingTradesById[_ids[i]]._swapper = _swapper;\n    }\n    emit TradesSwapperChanged(_ids, _swapper);\n  }\n\n  function mergePendingTrades(uint256 _anchorTradeId, uint256[] calldata _toMergeIds) external override onlyRole(TRADES_MODIFIER) {\n    Trade storage _anchorTrade = pendingTradesById[_anchorTradeId];\n    for (uint256 i; i < _toMergeIds.length; i++) {\n      Trade storage _trade = pendingTradesById[_toMergeIds[i]];\n      if (\n        _anchorTrade._id == _trade._id ||\n        _anchorTrade._strategy != _trade._strategy ||\n        _anchorTrade._tokenIn != _trade._tokenIn ||\n        _anchorTrade._tokenOut != _trade._tokenOut\n      ) revert InvalidTrade();\n      _anchorTrade._amountIn += _trade._amountIn;\n      _removePendingTrade(_trade._strategy, _trade._id);\n    }\n    emit TradesMerged(_anchorTradeId, _toMergeIds);\n  }\n\n  function _removePendingTrade(address _strategy, uint256 _id) internal {\n    _pendingTradesByOwner[_strategy].remove(_id);\n    _pendingTradesIds.remove(_id);\n    delete pendingTradesById[_id];\n  }\n}\n"
    },
    "contracts/TradeFactory/TradeFactoryExecutor.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.4 <0.9.0;\n\nimport '@openzeppelin/contracts/utils/math/Math.sol';\nimport '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';\nimport '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol';\nimport '@openzeppelin/contracts/utils/structs/EnumerableSet.sol';\n\nimport '@lbertenasco/contract-utils/contracts/utils/Machinery.sol';\n\nimport '../OTCPool.sol';\n\nimport './TradeFactoryPositionsHandler.sol';\n\ninterface ITradeFactoryExecutor {\n  event SyncTradeExecuted(\n    address indexed _strategy,\n    address indexed _swapper,\n    address _tokenIn,\n    address _tokenOut,\n    uint256 _amountIn,\n    uint256 _maxSlippage,\n    bytes _data,\n    uint256 _receivedAmount\n  );\n\n  event AsyncTradeExecuted(uint256 indexed _id, uint256 _receivedAmount);\n\n  event AsyncTradesMatched(\n    uint256 indexed _firstTradeId,\n    uint256 indexed _secondTradeId,\n    uint256 _consumedFirstTrade,\n    uint256 _consumedSecondTrade\n  );\n\n  event AsyncOTCTradesExecuted(uint256[] _ids, uint256 _rateTokenInToOut);\n\n  event AsyncTradeExpired(uint256 indexed _id);\n\n  event SwapperAndTokenEnabled(address indexed _swapper, address _token);\n\n  error OngoingTrade();\n\n  error ExpiredTrade();\n\n  error ZeroRate();\n\n  function execute(\n    address _tokenIn,\n    address _tokenOut,\n    uint256 _amountIn,\n    uint256 _maxSlippage,\n    bytes calldata _data\n  ) external returns (uint256 _receivedAmount);\n\n  function execute(uint256 _id, bytes calldata _data) external returns (uint256 _receivedAmount);\n\n  function expire(uint256 _id) external returns (uint256 _freedAmount);\n}\n\nabstract contract TradeFactoryExecutor is ITradeFactoryExecutor, TradeFactoryPositionsHandler, Machinery {\n  using SafeERC20 for IERC20;\n  using EnumerableSet for EnumerableSet.UintSet;\n  using EnumerableSet for EnumerableSet.AddressSet;\n\n  bytes32 public constant TRADES_SETTLER = keccak256('TRADES_SETTLER');\n\n  constructor(address _tradesSettler, address _mechanicsRegistry) Machinery(_mechanicsRegistry) {\n    _setRoleAdmin(TRADES_SETTLER, MASTER_ADMIN);\n    _setupRole(TRADES_SETTLER, _tradesSettler);\n  }\n\n  // Machinery\n  function setMechanicsRegistry(address _mechanicsRegistry) external virtual override onlyRole(MASTER_ADMIN) {\n    _setMechanicsRegistry(_mechanicsRegistry);\n  }\n\n  function execute(\n    address _tokenIn,\n    address _tokenOut,\n    uint256 _amountIn,\n    uint256 _maxSlippage,\n    bytes calldata _data\n  ) external override onlyRole(STRATEGY) returns (uint256 _receivedAmount) {\n    address _swapper = strategySyncSwapper[msg.sender];\n    if (_tokenIn == address(0) || _tokenOut == address(0)) revert CommonErrors.ZeroAddress();\n    if (_amountIn == 0) revert CommonErrors.ZeroAmount();\n    if (_maxSlippage == 0) revert CommonErrors.ZeroSlippage();\n    IERC20(_tokenIn).safeTransferFrom(msg.sender, _swapper, _amountIn);\n    _receivedAmount = ISwapper(_swapper).swap(msg.sender, _tokenIn, _tokenOut, _amountIn, _maxSlippage, _data);\n    emit SyncTradeExecuted(msg.sender, _swapper, _tokenIn, _tokenOut, _amountIn, _maxSlippage, _data, _receivedAmount);\n  }\n\n  // TradeFactoryExecutor\n  function execute(uint256 _id, bytes calldata _data) external override onlyMechanic returns (uint256 _receivedAmount) {\n    if (!_pendingTradesIds.contains(_id)) revert InvalidTrade();\n    Trade storage _trade = pendingTradesById[_id];\n    if (block.timestamp > _trade._deadline) revert ExpiredTrade();\n    if (!_swappers.contains(_trade._swapper)) revert InvalidSwapper();\n    IERC20(_trade._tokenIn).safeTransferFrom(_trade._strategy, _trade._swapper, _trade._amountIn);\n    _receivedAmount = ISwapper(_trade._swapper).swap(\n      _trade._strategy,\n      _trade._tokenIn,\n      _trade._tokenOut,\n      _trade._amountIn,\n      _trade._maxSlippage,\n      _data\n    );\n    _removePendingTrade(_trade._strategy, _id);\n    emit AsyncTradeExecuted(_id, _receivedAmount);\n  }\n\n  function expire(uint256 _id) external override onlyMechanic returns (uint256 _freedAmount) {\n    if (!_pendingTradesIds.contains(_id)) revert InvalidTrade();\n    Trade storage _trade = pendingTradesById[_id];\n    if (block.timestamp < _trade._deadline) revert OngoingTrade();\n    _freedAmount = _trade._amountIn;\n    // We have to take tokens from strategy, to decrease the allowance\n    IERC20(_trade._tokenIn).safeTransferFrom(_trade._strategy, address(this), _trade._amountIn);\n    // Send tokens back to strategy\n    IERC20(_trade._tokenIn).safeTransfer(_trade._strategy, _trade._amountIn);\n    // Remove trade\n    _removePendingTrade(_trade._strategy, _id);\n    emit AsyncTradeExpired(_id);\n  }\n\n  function execute(uint256[] calldata _ids, uint256 _rateTokenInToOut) external onlyMechanic {\n    if (_rateTokenInToOut == 0) revert ZeroRate();\n    address _tokenIn = pendingTradesById[_ids[0]]._tokenIn;\n    address _tokenOut = pendingTradesById[_ids[0]]._tokenOut;\n    uint256 _magnitudeIn = 10**IERC20Metadata(_tokenIn).decimals();\n    for (uint256 i; i < _ids.length; i++) {\n      Trade storage _trade = pendingTradesById[_ids[i]];\n      if (i > 0 && (_trade._tokenIn != _tokenIn || _trade._tokenOut != _tokenOut)) revert InvalidTrade();\n      if (block.timestamp > _trade._deadline) revert ExpiredTrade();\n      if ((strategyPermissions[_trade._strategy] & _OTC_MASK) != _OTC_MASK) revert CommonErrors.NotAuthorized();\n      uint256 _consumedOut = (_trade._amountIn * _rateTokenInToOut) / _magnitudeIn;\n      IERC20(_trade._tokenIn).safeTransferFrom(_trade._strategy, IOTCPool(otcPool).governor(), _trade._amountIn);\n      IOTCPool(otcPool).take(_trade._tokenOut, _consumedOut, _trade._strategy);\n      _removePendingTrade(_trade._strategy, _trade._id);\n    }\n    emit AsyncOTCTradesExecuted(_ids, _rateTokenInToOut);\n  }\n\n  function execute(\n    uint256 _firstTradeId,\n    uint256 _secondTradeId,\n    uint256 _consumedFirstTrade,\n    uint256 _consumedSecondTrade\n  ) external onlyRole(TRADES_SETTLER) returns (uint256 _receivedAmountAnchorTrade, uint256 _receivedAmountAgainstTrade) {\n    Trade storage _firstTrade = pendingTradesById[_firstTradeId];\n    Trade storage _secondTrade = pendingTradesById[_secondTradeId];\n    if (_firstTrade._tokenIn != _secondTrade._tokenOut || _firstTrade._tokenOut != _secondTrade._tokenIn) revert InvalidTrade();\n    if (block.timestamp > _firstTrade._deadline || block.timestamp > _secondTrade._deadline) revert ExpiredTrade();\n    if (\n      (strategyPermissions[_firstTrade._strategy] & _COW_MASK) != _COW_MASK ||\n      (strategyPermissions[_secondTrade._strategy] & _COW_MASK) != _COW_MASK\n    ) revert CommonErrors.NotAuthorized();\n\n    IERC20(_firstTrade._tokenIn).safeTransferFrom(_firstTrade._strategy, _secondTrade._strategy, _consumedFirstTrade);\n    IERC20(_secondTrade._tokenIn).safeTransferFrom(_secondTrade._strategy, _firstTrade._strategy, _consumedSecondTrade);\n\n    if (_consumedFirstTrade != _firstTrade._amountIn) {\n      _firstTrade._amountIn -= _consumedFirstTrade;\n    } else {\n      _removePendingTrade(_firstTrade._strategy, _firstTradeId);\n    }\n\n    if (_consumedSecondTrade != _secondTrade._amountIn) {\n      _secondTrade._amountIn -= _consumedSecondTrade;\n    } else {\n      _removePendingTrade(_secondTrade._strategy, _secondTradeId);\n    }\n\n    emit AsyncTradesMatched(_firstTradeId, _secondTradeId, _consumedFirstTrade, _consumedSecondTrade);\n  }\n}\n"
    },
    "contracts/TradeFactory/TradeFactorySwapperHandler.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.4 <0.9.0;\n\nimport '@openzeppelin/contracts/access/AccessControl.sol';\nimport '@openzeppelin/contracts/utils/structs/EnumerableSet.sol';\n\nimport '../Swapper.sol';\n\nimport './TradeFactoryAccessManager.sol';\n\ninterface ITradeFactorySwapperHandler {\n  event SyncStrategySwapperSet(address indexed _strategy, address _swapper);\n  event AsyncStrategySwapperSet(address indexed _strategy, address _swapper);\n  event StrategyPermissionsSet(address indexed _strategy, bytes1 _permissions);\n  event OTCPoolSet(address _otcPool);\n  event SwappersAdded(address[] _swappers);\n  event SwappersRemoved(address[] _swapper);\n\n  error NotAsyncSwapper();\n  error NotSyncSwapper();\n  error InvalidSwapper();\n  error InvalidPermissions();\n  error SwapperInUse();\n\n  function strategySyncSwapper(address _strategy) external view returns (address _swapper);\n\n  function strategyAsyncSwapper(address _strategy) external view returns (address _swapper);\n\n  function strategyPermissions(address _strategy) external view returns (bytes1 _permissions);\n\n  function swappers() external view returns (address[] memory _swappersList);\n\n  function isSwapper(address _swapper) external view returns (bool _isSwapper);\n\n  function swapperStrategies(address _swapper) external view returns (address[] memory _strategies);\n\n  function setStrategyPermissions(address _strategy, bytes1 _permissions) external;\n\n  function setOTCPool(address _otcPool) external;\n\n  function setStrategySyncSwapper(address _strategy, address _swapper) external;\n\n  function setStrategyAsyncSwapper(address _strategy, address _swapper) external;\n\n  function addSwappers(address[] memory __swappers) external;\n\n  function removeSwappers(address[] memory __swappers) external;\n}\n\nabstract contract TradeFactorySwapperHandler is ITradeFactorySwapperHandler, TradeFactoryAccessManager {\n  using EnumerableSet for EnumerableSet.AddressSet;\n\n  bytes32 public constant SWAPPER_ADDER = keccak256('SWAPPER_ADDER');\n  bytes32 public constant SWAPPER_SETTER = keccak256('SWAPPER_SETTER');\n\n  bytes1 internal constant _OTC_MASK = 0x01;\n  bytes1 internal constant _COW_MASK = 0x02;\n\n  // OTC Handler\n  address public otcPool;\n  // swappers list\n  EnumerableSet.AddressSet internal _swappers;\n  // swapper -> strategy list (useful to know if we can safely deprecate a swapper)\n  mapping(address => EnumerableSet.AddressSet) internal _swapperStrategies;\n  // strategy -> async swapper\n  mapping(address => address) public override strategyAsyncSwapper;\n  // strategy -> sync swapper\n  mapping(address => address) public override strategySyncSwapper;\n  // strategy -> permissions\n  // permissions[_OTC_PERMISSION_INDEX] => OTC\n  // permissions[_COW_PERMISSION_INDEX] => COW\n  mapping(address => bytes1) public override strategyPermissions;\n\n  constructor(address _swapperAdder, address _swapperSetter) {\n    if (_swapperAdder == address(0) || _swapperSetter == address(0)) reve