Contract Overview
Latest 7 from a total of 7 transactions
Contract Name:
Darbi
Compiler Version
v0.8.7+commit.e28d00a7
// File: contracts/Interfaces/IFactory.sol pragma solidity ^0.8.4; interface IFactory { function INIT_CODE_PAIR_HASH() external pure returns(bytes32); } // File: contracts/Libraries/FullMath.sol pragma solidity ^0.8.4; // The library below is taken from @uniswap/lib/contracts/libraries/FullMath.sol. It has been modified to work with solidity 0.8 library FullMath { /// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 /// @param a The multiplicand /// @param b The multiplier /// @param denominator The divisor /// @return result The 256-bit result /// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv function mulDiv( uint256 a, uint256 b, uint256 denominator ) internal pure returns (uint256 result) { // 512-bit multiply [prod1 prod0] = a * b // Compute the product mod 2**256 and mod 2**256 - 1 // then use the Chinese Remainder Theorem to reconstruct // the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2**256 + prod0 uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(a, b, not(0)) prod0 := mul(a, b) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division if (prod1 == 0) { require(denominator > 0); assembly { result := div(prod0, denominator) } return result; } // Make sure the result is less than 2**256. // Also prevents denominator == 0 require(denominator > prod1); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0] // Compute remainder using mulmod uint256 remainder; assembly { remainder := mulmod(a, b, denominator) } // Subtract 256 bit number from 512 bit number assembly { prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator // Compute largest power of two divisor of denominator. // Always >= 1. uint256 twos = denominator & (~denominator + 1); // Divide denominator by power of two assembly { denominator := div(denominator, twos) } // Divide [prod1 prod0] by the factors of two assembly { prod0 := div(prod0, twos) } // Shift in bits from prod1 into prod0. For this we need // to flip `twos` such that it is 2**256 / twos. // If twos is zero, then it becomes one assembly { twos := add(div(sub(0, twos), twos), 1) } prod0 |= prod1 * twos; // Invert denominator mod 2**256 // Now that denominator is an odd number, it has an inverse // modulo 2**256 such that denominator * inv = 1 mod 2**256. // Compute the inverse by starting with a seed that is correct // correct for four bits. That is, denominator * inv = 1 mod 2**4 uint256 inv = (3 * denominator) ^ 2; // Now use Newton-Raphson iteration to improve the precision. // Thanks to Hensel's lifting lemma, this also works in modular // arithmetic, doubling the correct bits in each step. inv *= 2 - denominator * inv; // inverse mod 2**8 inv *= 2 - denominator * inv; // inverse mod 2**16 inv *= 2 - denominator * inv; // inverse mod 2**32 inv *= 2 - denominator * inv; // inverse mod 2**64 inv *= 2 - denominator * inv; // inverse mod 2**128 inv *= 2 - denominator * inv; // inverse mod 2**256 // Because the division is now exact we can divide by multiplying // with the modular inverse of denominator. This will give us the // correct result modulo 2**256. Since the precoditions guarantee // that the outcome is less than 2**256, this is the final result. // We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inv; return result; } /// @notice Calculates ceil(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 /// @param a The multiplicand /// @param b The multiplier /// @param denominator The divisor /// @return result The 256-bit result function mulDivRoundingUp( uint256 a, uint256 b, uint256 denominator ) internal pure returns (uint256 result) { result = mulDiv(a, b, denominator); if (mulmod(a, b, denominator) > 0) { require(result < type(uint256).max); result++; } } } // File: @uniswap/lib/contracts/libraries/TransferHelper.sol pragma solidity >=0.6.0; // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require( success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper::safeApprove: approve failed' ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require( success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper::safeTransfer: transfer failed' ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require( success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper::transferFrom: transferFrom failed' ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'TransferHelper::safeTransferETH: ETH transfer failed'); } } // File: @uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol pragma solidity >=0.5.0; interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function mint(address to) external returns (uint liquidity); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } // File: @openzeppelin/contracts/utils/math/SafeMath.sol // OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol) pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the subtraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } } // File: @openzeppelin/contracts/utils/introspection/IERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: @openzeppelin/contracts/utils/introspection/ERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File: @openzeppelin/contracts/utils/Strings.sol // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: @openzeppelin/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @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 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) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: @openzeppelin/contracts/security/Pausable.sol // OpenZeppelin Contracts v4.4.1 (security/Pausable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!paused(), "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(paused(), "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } } // File: @openzeppelin/contracts/access/IAccessControl.sol // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; } // File: @openzeppelin/contracts/access/AccessControl.sol // OpenZeppelin Contracts (last updated v4.6.0) (access/AccessControl.sol) pragma solidity ^0.8.0; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `_msgSender()` is missing `role`. * Overriding this function changes the behavior of the {onlyRole} modifier. * * Format of the revert message is described in {_checkRole}. * * _Available since v4.6._ */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(uint160(account), 20), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } } // File: @openzeppelin/contracts/utils/Address.sol // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @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 * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 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); } } } } // File: @openzeppelin/contracts/token/ERC20/IERC20.sol // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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); /** * @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 `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, 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 `from` to `to` 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 from, address to, uint256 amount ) external returns (bool); } // File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); } // File: @openzeppelin/contracts/token/ERC20/ERC20.sol // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; } _balances[to] += amount; emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } // File: contracts/UP.sol pragma solidity ^0.8.4; contract UP is ERC20, AccessControl { bytes32 public constant MINT_ROLE = keccak256("MINT_ROLE"); bytes32 public constant LEGACY_MINT_ROLE = keccak256("LEGACY_MINT_ROLE"); address public UP_CONTROLLER = address(0); event SetUPController(address _setter, address _newController); modifier onlyMint() { require(hasRole(MINT_ROLE, msg.sender), "UP: ONLY_MINT"); _; } modifier onlyAdmin() { require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "UP: ONLY_ADMIN"); _; } constructor() ERC20("UPiotx", "UPiotx") { _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); } /// @notice UPv1 legacy receive() external payable {} function burn(uint256 amount) public { _burn(_msgSender(), amount); } function burnFrom(address account, uint256 amount) public { _spendAllowance(account, _msgSender(), amount); _burn(account, amount); } /// @notice Retrocompatible function with v1 function justBurn(uint256 amount) external { burn(amount); } /// @notice Mints token and have logic for supporting legacy mint logic function mint(address to, uint256 amount) public payable onlyMint returns (bool) { /// LEGACY_MINT_ROLE retrocompatible with UPv1 if (hasRole(LEGACY_MINT_ROLE, msg.sender) && UP_CONTROLLER != address(0)) { (bool success, ) = UP_CONTROLLER.call{value: msg.value}( abi.encodeWithSignature(("mintUP(address)"), to) ); require(success, "UP: LEGACY_MINT_FAILED"); } else { _mint(to, amount); } /// Legacy UPv1 return return true; } /// @notice Sets a controller address that will receive the funds from LEGACY_MINT_ROLE function setController(address newController) public onlyAdmin { UP_CONTROLLER = newController; emit SetUPController(msg.sender, newController); } function withdrawFunds() public { require(UP_CONTROLLER != address(0)); (bool success, ) = UP_CONTROLLER.call{value: address(this).balance}(""); require(success); } } // File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol // OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; /** * @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"); } } } // File: contracts/Helpers/Safe.sol pragma solidity ^0.8.4; abstract contract Safe { using SafeERC20 for IERC20; address target; constructor(address _target) { target = _target; } function _withdrawFunds() internal returns (bool) { (bool sent, ) = address(target).call{value: address(this).balance}(""); require(sent, "Safe: Failed to send Ether"); return sent; } function _withdrawFundsERC20(address tokenAddress) internal returns (bool) { IERC20 token = IERC20(tokenAddress); token.safeTransfer(target, token.balanceOf(address(this))); return true; } } // File: contracts/UPController.sol pragma solidity ^0.8.4; /// @title UP Controller /// @author dxffffff & A Fistful of Stray Cat Hair /// @notice This controller back up the UP token and has the logic for borrowing tokens. contract UPController is AccessControl, Safe, Pausable { bytes32 public constant REBALANCER_ROLE = keccak256("REBALANCER_ROLE"); bytes32 public constant REDEEMER_ROLE = keccak256("REDEEMER_ROLE"); address payable public UP_TOKEN = payable(address(0)); uint256 public nativeBorrowed = 0; uint256 public upBorrowed = 0; event SyntheticMint(address _from, uint256 _amount, uint256 _newUpBorrowed); event BorrowNative(address _from, uint256 _amount, uint256 _newNativeBorrowed); event Repay(uint256 _nativeAmount, uint256 _upAmount); event Redeem(uint256 _upAmount, uint256 _redeemAmount); modifier onlyRebalancer() { require(hasRole(REBALANCER_ROLE, msg.sender), "UPController: ONLY_REBALANCER"); _; } modifier onlyAdmin() { require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "UPController: ONLY_ADMIN"); _; } modifier onlyRedeemer() { require(hasRole(REDEEMER_ROLE, msg.sender), "UPController: ONLY_REDEEMER"); _; } constructor(address _UP, address _fundsTarget) Safe(_fundsTarget) { require(_UP != address(0), "UPController: Invalid UP address"); UP_TOKEN = payable(_UP); _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); } receive() external payable {} /// @notice Returns price of UP token based on its reserves function getVirtualPrice() public view returns (uint256) { if (getNativeBalance() == 0) return 0; return ((getNativeBalance() * 1e18) / actualTotalSupply()); } /// @notice Returns price of UP token based on its reserves minus amount sent to the contract function getVirtualPrice(uint256 sentValue) public view returns (uint256) { if (getNativeBalance() == 0) return 0; uint256 nativeBalance = getNativeBalance() - sentValue; return ((nativeBalance * 1e18) / actualTotalSupply()); } /// @notice Computed the actual native balances of the contract function getNativeBalance() public view returns (uint256) { return address(this).balance + nativeBorrowed; } /// @notice Computed total supply of UP token function actualTotalSupply() public view returns (uint256) { return UP(UP_TOKEN).totalSupply() - upBorrowed; } /// @notice Borrows native token from the back up reserves function borrowNative(uint256 _borrowAmount, address _to) public onlyRebalancer whenNotPaused { require(address(this).balance >= _borrowAmount, "UPController: NOT_ENOUGH_BALANCE"); (bool success, ) = _to.call{value: _borrowAmount}(""); nativeBorrowed += _borrowAmount; require(success, "UPController: BORROW_NATIVE_FAILED"); emit BorrowNative(_to, _borrowAmount, nativeBorrowed); } /// @notice Borrows UP token minting it function borrowUP(uint256 _borrowAmount, address _to) public onlyRebalancer whenNotPaused { upBorrowed += _borrowAmount; UP(UP_TOKEN).mint(_to, _borrowAmount); emit SyntheticMint(msg.sender, _borrowAmount, upBorrowed); } function mintSyntheticUP(uint256 _mintAmount, address _to) public onlyRebalancer whenNotPaused { borrowUP(_mintAmount, _to); } /// @notice Mints UP based on virtual price - UPv1 logic function mintUP(address to) external payable whenNotPaused { require(msg.sender == UP_TOKEN, "UPController: NON_UP_CONTRACT"); uint256 mintAmount = (msg.value * 1e18) / getVirtualPrice(msg.value); UP(UP_TOKEN).mint(to, mintAmount); } /// @notice Allows to return back borrowed amounts to the controller function repay(uint256 upAmount) public payable onlyRebalancer whenNotPaused { UP(UP_TOKEN).burnFrom(msg.sender, upAmount); upBorrowed -= upAmount <= upBorrowed ? upAmount : upBorrowed; nativeBorrowed -= msg.value <= nativeBorrowed ? msg.value : nativeBorrowed; emit Repay(msg.value, upAmount); } /// @notice Swaps UP token by native token function redeem(uint256 upAmount) public onlyRedeemer whenNotPaused { require(upAmount > 0, "UPController: AMOUNT_EQ_0"); uint256 redeemAmount = (getVirtualPrice() * upAmount) / 1e18; UP(UP_TOKEN).burnFrom(msg.sender, upAmount); (bool success, ) = msg.sender.call{value: redeemAmount}(""); require(success, "UPController: REDEEM_FAILED"); emit Redeem(upAmount, redeemAmount); } function pause() public onlyAdmin { _pause(); } function unpause() public onlyAdmin { _unpause(); } function withdrawFunds() public onlyAdmin returns (bool) { return _withdrawFunds(); } function withdrawFundsERC20(address tokenAddress) public onlyAdmin returns (bool) { return _withdrawFundsERC20(tokenAddress); } } // File: contracts/Darbi/UPMintDarbi.sol pragma solidity ^0.8.4; /// @title UP Darbi Mint /// @author Daniel Blanco & A Fistful of Stray Cat Hair /// @notice This contract allows to DARBi to mint UP at virtual price. contract UPMintDarbi is AccessControl, Pausable, Safe { bytes32 public constant DARBI_ROLE = keccak256("DARBI_ROLE"); address payable public UP_TOKEN = payable(address(0)); address payable public UP_CONTROLLER = payable(address(0)); modifier onlyDarbi() { require(hasRole(DARBI_ROLE, msg.sender), "UPMintDarbi: ONLY_DARBI"); _; } modifier onlyAdmin() { require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "UPMintDarbi: ONLY_ADMIN"); _; } event DarbiMint(address indexed _from, uint256 _amount, uint256 _price, uint256 _value); event UpdateController(address _upController); constructor( address _UP, address _UPController, address _fundsTarget ) Safe(_fundsTarget) { require(_UP != address(0), "UPMintDarbi: Invalid UP address"); UP_TOKEN = payable(_UP); UP_CONTROLLER = payable(_UPController); _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); } /// @notice Payable function that mints UP at the mint rate, deposits the native tokens to the UP Controller, Sends UP to the Msg.sender function mintUP() public payable whenNotPaused onlyDarbi { require(msg.value > 0, "UPMintDarbi: INVALID_PAYABLE_AMOUNT"); uint256 currentPrice = UPController(UP_CONTROLLER).getVirtualPrice(); if (currentPrice == 0) return; uint256 mintAmount = (msg.value * 1e18) / currentPrice; UP(UP_TOKEN).mint(msg.sender, mintAmount); (bool successTransfer, ) = UP_CONTROLLER.call{value: msg.value}(""); /// GO BACK require(successTransfer, "UPMintDarbi: FAIL_SENDING_NATIVE"); emit DarbiMint(msg.sender, mintAmount, currentPrice, msg.value); } ///@notice Permissioned function to update the address of the UP Controller ///@param _upController - the address of the new UP Controller function updateController(address _upController) public onlyAdmin { require(_upController != address(0), "UPMintDarbi: INVALID_ADDRESS"); UP_CONTROLLER = payable(_upController); emit UpdateController(_upController); } ///@notice Grant DARBi role ///@param _darbiAddr - a new DARBi address function grantDarbiRole(address _darbiAddr) public onlyAdmin { require(_darbiAddr != address(0), "UPMintDarbi: INVALID_ADDRESS"); grantRole(DARBI_ROLE, _darbiAddr); } ///@notice Revoke DARBi role ///@param _darbiAddr - DARBi address to revoke function revokeDarbiRole(address _darbiAddr) public onlyAdmin { require(_darbiAddr != address(0), "UPMintDarbi: INVALID_ADDRESS"); revokeRole(DARBI_ROLE, _darbiAddr); } ///@notice Permissioned function to withdraw any native coins accidentally deposited to the Darbi Mint contract. function withdrawFunds() public onlyAdmin returns (bool) { return _withdrawFunds(); } ///@notice Permissioned function to withdraw any tokens accidentally deposited to the Darbi Mint contract. function withdrawFundsERC20(address tokenAddress) public onlyAdmin returns (bool) { return _withdrawFundsERC20(tokenAddress); } /// @notice Permissioned function to pause UPaddress Controller function pause() public onlyAdmin { _pause(); } /// @notice Permissioned function to unpause UPaddress Controller function unpause() public onlyAdmin { _unpause(); } fallback() external payable {} receive() external payable {} } // File: @uniswap/lib/contracts/libraries/Babylonian.sol pragma solidity >=0.4.0; // computes square roots using the babylonian method // https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method library Babylonian { // credit for this implementation goes to // https://github.com/abdk-consulting/abdk-libraries-solidity/blob/master/ABDKMath64x64.sol#L687 function sqrt(uint256 x) internal pure returns (uint256) { if (x == 0) return 0; // this block is equivalent to r = uint256(1) << (BitMath.mostSignificantBit(x) / 2); // however that code costs significantly more gas uint256 xx = x; uint256 r = 1; if (xx >= 0x100000000000000000000000000000000) { xx >>= 128; r <<= 64; } if (xx >= 0x10000000000000000) { xx >>= 64; r <<= 32; } if (xx >= 0x100000000) { xx >>= 32; r <<= 16; } if (xx >= 0x10000) { xx >>= 16; r <<= 8; } if (xx >= 0x100) { xx >>= 8; r <<= 4; } if (xx >= 0x10) { xx >>= 4; r <<= 2; } if (xx >= 0x8) { r <<= 1; } r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; // Seven iterations should be enough uint256 r1 = x / r; return (r < r1 ? r : r1); } } // File: contracts/Libraries/UniswapHelper.sol pragma solidity ^0.8.4; library UniswapHelper { using SafeMath for uint256; // given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset function getAmountOut( uint256 amountIn, uint256 reserveIn, uint256 reserveOut ) internal pure returns (uint256 amountOut) { require(amountIn > 0, "UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT"); require(reserveIn > 0 && reserveOut > 0, "UniswapV2Library: INSUFFICIENT_LIQUIDITY"); uint256 amountInWithFee = amountIn * 997; uint256 numerator = amountInWithFee * reserveOut; uint256 denominator = reserveIn * 1000 + amountInWithFee; amountOut = numerator / denominator; } // given an output amount of an asset and pair reserves, returns a required input amount of the other asset function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) { require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT'); require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY'); uint numerator = reserveIn.mul(amountOut).mul(1000); uint denominator = reserveOut.sub(amountOut).mul(997); amountIn = (numerator / denominator).add(1); } // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset function quote( uint256 amountA, uint256 reserveA, uint256 reserveB ) internal pure returns (uint256 amountB) { require(amountA > 0, "UniswapV2Library: INSUFFICIENT_AMOUNT"); require(reserveA > 0 && reserveB > 0, "UniswapV2Library: INSUFFICIENT_LIQUIDITY"); amountB = (amountA * reserveB) / reserveA; } /** * @notice Given the "true" price a token (represented by truePriceTokenA/truePriceTokenB) and the reservers in the * uniswap pair, calculate: a) the direction of trade (aToB) and b) the amount needed to trade (amountIn) to move * the pool price to be equal to the true price. * @dev Note that this method uses the Babylonian square root method which has a small margin of error which will * result in a small over or under estimation on the size of the trade needed. * @param truePriceTokenA the nominator of the true price. * @param truePriceTokenB the denominator of the true price. * @param reserveA number of token A in the pair reserves * @param reserveB number of token B in the pair reserves */ // function computeTradeToMoveMarket( uint256 truePriceTokenA, uint256 truePriceTokenB, uint256 reserveA, uint256 reserveB ) public pure returns (bool aToB, uint256 amountIn) { aToB = FullMath.mulDiv(reserveA, truePriceTokenB, reserveB) < truePriceTokenA; uint256 invariant = reserveA.mul(reserveB); uint256 leftSide = Babylonian.sqrt( FullMath.mulDiv( invariant.mul(1000), aToB ? truePriceTokenA : truePriceTokenB, (aToB ? truePriceTokenB : truePriceTokenA).mul(997) ) ); uint256 rightSide = (aToB ? reserveA.mul(1000) : reserveB.mul(1000)) / 997; if (leftSide < rightSide) return (false, 0); amountIn = leftSide.sub(rightSide); } // The methods below are taken from https://github.com/Uniswap/uniswap-v2-periphery/blob/master/contracts/libraries/UniswapV2Library.sol // We could import this library into this contract but this library is dependent Uniswap's SafeMath, which is bound // to solidity 6.6.6. UMA uses 0.8.0 and so a modified version is needed to accomidate this solidity version. function getReserves( address factory, address tokenA, address tokenB ) public view returns (uint256 reserveA, uint256 reserveB) { (address token0, ) = sortTokens(tokenA, tokenB); (uint256 reserve0, uint256 reserve1, ) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)) .getReserves(); (reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0); } function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) { require(tokenA != tokenB, "UniswapV2Library: IDENTICAL_ADDRESSES"); (token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA); require(token0 != address(0), "UniswapV2Library: ZERO_ADDRESS"); } // calculates the CREATE2 address for a pair without making any external calls function pairFor( address factory, address tokenA, address tokenB ) public pure returns (address pair) { (address token0, address token1) = sortTokens(tokenA, tokenB); bytes32 initCodeHash = IFactory(factory).INIT_CODE_PAIR_HASH(); pair = address( uint160( uint256( keccak256( abi.encodePacked( hex"ff", factory, keccak256(abi.encodePacked(token0, token1)), initCodeHash ) ) ) ) ); } } // File: @uniswap/v2-periphery/contracts/interfaces/IWETH.sol pragma solidity >=0.5.0; interface IWETH { function deposit() external payable; function transfer(address to, uint value) external returns (bool); function withdraw(uint) external; } // File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol pragma solidity >=0.6.2; interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } // File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol pragma solidity >=0.6.2; interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; } // File: contracts/Darbi/Darbi.sol pragma solidity ^0.8.4; contract Darbi is AccessControl, Pausable, Safe { using SafeERC20 for IERC20; bytes32 public constant MONITOR_ROLE = keccak256("MONITOR_ROLE"); bytes32 public constant REBALANCER_ROLE = keccak256("REBALANCER_ROLE"); address public factory; address public WETH; address public gasRefundAddress; uint256 public arbitrageThreshold = 100000; uint256 public gasRefund = 3500000000000000; uint256 public darbiDepositBalance = 0.5 ether; IERC20 public UP_TOKEN; IUniswapV2Router02 public router; UPController public UP_CONTROLLER; UPMintDarbi public DARBI_MINTER; event Arbitrage(bool isSellingUp, uint256 actualAmountIn); modifier onlyAdmin() { require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "Darbi: ONLY_ADMIN"); _; } modifier onlyMonitor() { require(hasRole(MONITOR_ROLE, msg.sender), "Darbi: ONLY_MONITOR"); _; } modifier onlyRebalancer() { require(hasRole(REBALANCER_ROLE, msg.sender), "Darbi: ONLY_REBALANCER"); _; } modifier onlyRebalancerOrMonitor() { require( hasRole(REBALANCER_ROLE, msg.sender) || hasRole(MONITOR_ROLE, msg.sender), "Darbi: ONLY_REBALANCER_OR_MONITOR" ); _; } constructor( address _factory, address _router, address _WETH, address _gasRefundAddress, address _UP_CONTROLLER, address _darbiMinter, address _fundsTarget ) Safe(_fundsTarget) { factory = _factory; router = IUniswapV2Router02(_router); WETH = _WETH; gasRefundAddress = _gasRefundAddress; UP_CONTROLLER = UPController(payable(_UP_CONTROLLER)); DARBI_MINTER = UPMintDarbi(payable(_darbiMinter)); UP_TOKEN = IERC20(payable(UP_CONTROLLER.UP_TOKEN())); _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); } receive() external payable {} function arbitrage() public whenNotPaused onlyMonitor { ( bool aToB, uint256 amountIn, uint256 reserves0, uint256 reserves1, uint256 backedValue ) = moveMarketBuyAmount(); // aToB == true == Buys UP // aToB == fals == Sells UP uint256 balances = address(this).balance; // If Buying UP if (!aToB) { require(amountIn > gasRefund, "Darbi: Trade will not be profitable"); if (amountIn < arbitrageThreshold) return; _arbitrageBuy(balances, amountIn, backedValue, reserves0, reserves1); } else { uint256 amountInETHTerms = (amountIn * backedValue) / 1e18; require(amountInETHTerms > gasRefund, "Darbi: Trade will not be profitable"); if (amountInETHTerms < arbitrageThreshold) return; _arbitrageSell(balances, amountIn, backedValue); } refund(); } function forceArbitrage() public whenNotPaused onlyRebalancer { ( bool aToB, uint256 amountIn, uint256 reservesUP, uint256 reservesETH, uint256 backedValue ) = moveMarketBuyAmount(); // aToB == true == Buys UP // aToB == fals == Sells UP uint256 balances = address(this).balance; // If Buying UP if (!aToB) { if (amountIn < arbitrageThreshold) return; _arbitrageBuy(balances, amountIn, backedValue, reservesUP, reservesETH); } else { uint256 amountInETHTerms = (amountIn * backedValue) / 1e18; if (amountInETHTerms < arbitrageThreshold) return; _arbitrageSell(balances, amountIn, backedValue); } } function _arbitrageBuy( uint256 balances, uint256 amountIn, uint256 backedValue, uint256 reservesUP, uint256 reservesETH ) internal { uint256 actualAmountIn = amountIn <= balances ? amountIn : balances; //Value is going to native uint256 expectedReturn = UniswapHelper.getAmountOut(actualAmountIn, reservesETH, reservesUP); // Amount of UP expected from Buy uint256 expectedNativeReturn = (expectedReturn * backedValue) / 1e18; //Amount of Native Tokens Expected to Receive from Redeem uint256 upControllerBalance = address(UP_CONTROLLER).balance; if (upControllerBalance < expectedNativeReturn) { uint256 upOutput = (upControllerBalance * 1e18) / backedValue; //Value in UP Token actualAmountIn = UniswapHelper.getAmountIn(upOutput, reservesETH, reservesUP); // Amount of UP expected from Buy } address[] memory path = new address[](2); path[0] = WETH; path[1] = address(UP_TOKEN); uint256[] memory amounts = router.swapExactETHForTokens{value: actualAmountIn}( 0, path, address(this), block.timestamp + 150 ); UP_TOKEN.approve(address(UP_CONTROLLER), amounts[1]); UP_CONTROLLER.redeem(amounts[1]); emit Arbitrage(false, actualAmountIn); } function _arbitrageSell( uint256 balances, uint256 amountIn, uint256 backedValue ) internal { // If selling UP uint256 darbiBalanceMaximumUpToMint = (balances * 1e18) / backedValue; // Amount of UP that we can mint with current balances uint256 actualAmountIn = amountIn <= darbiBalanceMaximumUpToMint ? amountIn : darbiBalanceMaximumUpToMint; // Value in UP uint256 nativeToMint = (actualAmountIn * backedValue) / 1e18; DARBI_MINTER.mintUP{value: nativeToMint}(); address[] memory path = new address[](2); path[0] = address(UP_TOKEN); path[1] = WETH; uint256 up2Balance = UP_TOKEN.balanceOf(address(this)); UP_TOKEN.approve(address(router), up2Balance); router.swapExactTokensForETH(up2Balance, 0, path, address(this), block.timestamp + 150); emit Arbitrage(true, up2Balance); } function refund() public whenNotPaused onlyRebalancerOrMonitor { uint256 newBalances0 = address(this).balance; if ((newBalances0 + gasRefund) < darbiDepositBalance) return; (bool success1, ) = gasRefundAddress.call{value: gasRefund}(""); require(success1, "Darbi: FAIL_SENDING_GAS_REFUND_TO_MONITOR"); uint256 newBalances1 = newBalances0 - gasRefund; uint256 diffBalances = newBalances1 > darbiDepositBalance ? newBalances1 - darbiDepositBalance : 0; if (diffBalances > 0) { (bool success2, ) = address(UP_CONTROLLER).call{value: diffBalances}(""); require(success2, "Darbi: FAIL_SENDING_BALANCES_TO_CONTROLLER"); } } function moveMarketBuyAmount() public view returns ( bool aToB, uint256 amountIn, uint256 reservesUP, uint256 reservesETH, uint256 upPrice ) { (reservesUP, reservesETH) = UniswapHelper.getReserves( factory, address(UP_TOKEN), address(WETH) ); upPrice = UP_CONTROLLER.getVirtualPrice(); (aToB, amountIn) = UniswapHelper.computeTradeToMoveMarket( 1000000000000000000, // Ratio = 1:UPVirtualPrice upPrice, reservesUP, reservesETH ); return (aToB, amountIn, reservesUP, reservesETH, upPrice); } function addDarbiFunds() public payable { uint256 depositAmount = msg.value; darbiDepositBalance += depositAmount; } function redeemUP() internal { UP_CONTROLLER.redeem(IERC20(UP_CONTROLLER.UP_TOKEN()).balanceOf(address(this))); } function setController(address _controller) public onlyAdmin { require(_controller != address(0)); UP_CONTROLLER = UPController(payable(_controller)); } function setDarbiFunds(uint256 setAmount) public onlyAdmin { darbiDepositBalance = setAmount; } function setArbitrageThreshold(uint256 _threshold) public onlyAdmin { require(_threshold > 0); arbitrageThreshold = _threshold; } function setGasRefund(uint256 _gasRefund) public onlyAdmin { require(_gasRefund > 0); gasRefund = _gasRefund; } function setGasRefundAddress(address _gasRefundAddress) public onlyAdmin { require(_gasRefundAddress != address(0)); gasRefundAddress = _gasRefundAddress; } function setDarbiMinter(address _newMinter) public onlyAdmin { require(_newMinter != address(0)); DARBI_MINTER = UPMintDarbi(payable(_newMinter)); } function withdrawFunds() public onlyAdmin returns (bool) { darbiDepositBalance == 0; return _withdrawFunds(); } function withdrawFundsERC20(address tokenAddress) public onlyAdmin returns (bool) { return _withdrawFundsERC20(tokenAddress); } /// @notice Permissioned function to pause UPaddress Controller function pause() public onlyAdmin { _pause(); } /// @notice Permissioned function to unpause UPaddress Controller function unpause() public onlyAdmin { _unpause(); } }
[{"inputs":[{"internalType":"address","name":"_factory","type":"address"},{"internalType":"address","name":"_router","type":"address"},{"internalType":"address","name":"_WETH","type":"address"},{"internalType":"address","name":"_gasRefundAddress","type":"address"},{"internalType":"address","name":"_UP_CONTROLLER","type":"address"},{"internalType":"address","name":"_darbiMinter","type":"address"},{"internalType":"address","name":"_fundsTarget","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"isSellingUp","type":"bool"},{"indexed":false,"internalType":"uint256","name":"actualAmountIn","type":"uint256"}],"name":"Arbitrage","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[],"name":"DARBI_MINTER","outputs":[{"internalType":"contract UPMintDarbi","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MONITOR_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"REBALANCER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"UP_CONTROLLER","outputs":[{"internalType":"contract UPController","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"UP_TOKEN","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"WETH","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"addDarbiFunds","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"arbitrage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"arbitrageThreshold","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"darbiDepositBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"forceArbitrage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"gasRefund","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"gasRefundAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"moveMarketBuyAmount","outputs":[{"internalType":"bool","name":"aToB","type":"bool"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"reservesUP","type":"uint256"},{"internalType":"uint256","name":"reservesETH","type":"uint256"},{"internalType":"uint256","name":"upPrice","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"refund","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"router","outputs":[{"internalType":"contract IUniswapV2Router02","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_threshold","type":"uint256"}],"name":"setArbitrageThreshold","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_controller","type":"address"}],"name":"setController","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"setAmount","type":"uint256"}],"name":"setDarbiFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newMinter","type":"address"}],"name":"setDarbiMinter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_gasRefund","type":"uint256"}],"name":"setGasRefund","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_gasRefundAddress","type":"address"}],"name":"setGasRefundAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawFunds","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"}],"name":"withdrawFundsERC20","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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