Contract Address Details
0x2Ad3f97d6c40b6770711059acce359d68144d239
- Contract Name
- BSWAPMasterFarmer
- Creator
- 0xdca514–365f2a at 0x801d14–343113
- Balance
- 0 Doge
- Tokens
-
Fetching tokens...
- Transactions
- 6 Transactions
- Transfers
- 0 Transfers
- Gas Used
- 907,226
- Last Balance Update
- 17529086
- Contract name:
- BSWAPMasterFarmer
- Optimization enabled
- true
- Compiler version
- v0.6.12+commit.27d51765
- Optimization runs
- 200
- EVM Version
- default
- Verified at
- 2022-09-07T17:15:46.007491Z
Constructor Arguments
000000000000000000000000d21690cfbd4321c75b99d3c1ad7fbcc1eca162c2000000000000000000000000dca5142369affc5d39b8e51281f3e2b762365f2a
Arg [0] (address) : 0xd21690cfbd4321c75b99d3c1ad7fbcc1eca162c2
Arg [1] (address) : 0xdca5142369affc5d39b8e51281f3e2b762365f2a
Contract source code
//SPDX-License-Identifier: UNLICENSED pragma solidity ^0.6.12; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // File: @openzeppelin/contracts/utils/Address.sol /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @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"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); 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 // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @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' // solhint-disable-next-line max-line-length 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).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _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 // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256` * (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } // BSWAPToken with Governance. contract BSWAPToken is ERC20("BSWAP Token", "BSWAP"), Ownable { uint256 private _cap = 100000000e18; uint256 private _initial_supply = 3200000e18; uint256 private _totalLock; uint256 public lockFromBlock; uint256 public lockToBlock; uint256 public transferBurnRate; bool public farmingEnabled; mapping(address => uint256) private _locks; mapping(address => bool) private _transferBurnExceptAddresses; mapping(address => uint256) private _lastUnlockBlock; event Lock(address indexed to, uint256 value); /** * @dev Returns the cap on the token's total supply. */ function cap() public view returns (uint256) { return _cap; } function circulatingSupply() public view returns (uint256) { return totalSupply().sub(_totalLock); } function totalLock() public view returns (uint256) { return _totalLock; } /** * @dev See {ERC20-_beforeTokenTransfer}. * * Requirements: * * - minted tokens must not cause the total supply to go over the cap. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override { super._beforeTokenTransfer(from, to, amount); if (from == address(0)) { // When minting tokens require(totalSupply().add(amount) <= _cap, "ERC20Capped: cap exceeded"); } } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual override { if (transferBurnRate > 0 && _transferBurnExceptAddresses[sender] != true && _transferBurnExceptAddresses[recipient] != true && recipient != address(0)) { uint256 _burntAmount = amount * transferBurnRate / 100; // Burn transferBurnRate% from amount super._burn(sender, _burntAmount); // Recalibrate the transfer amount amount = amount - _burntAmount; } super._transfer(sender, recipient, amount); _moveDelegates(_delegates[sender], _delegates[recipient], amount); } /// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef). function mint(address _to, uint256 _amount) public onlyOwner { _mint(_to, _amount); _moveDelegates(address(0), _delegates[_to], _amount); } function totalBalanceOf(address _holder) public view returns (uint256) { return _locks[_holder].add(balanceOf(_holder)); } function lockOf(address _holder) public view returns (uint256) { return _locks[_holder]; } function lastUnlockBlock(address _holder) public view returns (uint256) { return _lastUnlockBlock[_holder]; } function lock(address _holder, uint256 _amount) public onlyOwner { require(_holder != address(0), "ERC20: lock to the zero address"); require(_amount <= balanceOf(_holder), "ERC20: lock amount over blance"); _transfer(_holder, address(this), _amount); _locks[_holder] = _locks[_holder].add(_amount); _totalLock = _totalLock.add(_amount); if (_lastUnlockBlock[_holder] < lockFromBlock) { _lastUnlockBlock[_holder] = lockFromBlock; } emit Lock(_holder, _amount); } function canUnlockAmount(address _holder) public view returns (uint256) { if (block.number < lockFromBlock) { return 0; } else if (block.number >= lockToBlock) { return _locks[_holder]; } else { uint256 releaseBlock = block.number.sub(_lastUnlockBlock[_holder]); uint256 numberLockBlock = lockToBlock.sub(_lastUnlockBlock[_holder]); return _locks[_holder].mul(releaseBlock).div(numberLockBlock); } } function unlock() public { require(_locks[msg.sender] > 0, "ERC20: cannot unlock"); uint256 amount = canUnlockAmount(msg.sender); // just for sure if (amount > balanceOf(address(this))) { amount = balanceOf(address(this)); } _transfer(address(this), msg.sender, amount); _locks[msg.sender] = _locks[msg.sender].sub(amount); _lastUnlockBlock[msg.sender] = block.number; _totalLock = _totalLock.sub(amount); } // This function is for dev address migrate all balance to a multi sig address function transferAll(address _to) public { _locks[_to] = _locks[_to].add(_locks[msg.sender]); if (_lastUnlockBlock[_to] < lockFromBlock) { _lastUnlockBlock[_to] = lockFromBlock; } if (_lastUnlockBlock[_to] < _lastUnlockBlock[msg.sender]) { _lastUnlockBlock[_to] = _lastUnlockBlock[msg.sender]; } _locks[msg.sender] = 0; _lastUnlockBlock[msg.sender] = 0; _transfer(msg.sender, _to, balanceOf(msg.sender)); } // Copied and modified from YAM code: // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol // Which is copied and modified from COMPOUND: // https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol /// @dev A record of each accounts delegate mapping (address => address) internal _delegates; /// @notice A checkpoint for marking number of votes from a given block struct Checkpoint { uint32 fromBlock; uint256 votes; } /// @notice A record of votes checkpoints for each account, by index mapping (address => mapping (uint32 => Checkpoint)) public checkpoints; /// @notice The number of checkpoints for each account mapping (address => uint32) public numCheckpoints; /// @notice The EIP-712 typehash for the contract's domain bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)"); /// @notice The EIP-712 typehash for the delegation struct used by the contract bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); /// @notice A record of states for signing / validating signatures mapping (address => uint) public nonces; /// @notice An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @notice An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegator The address to get delegatee for */ function delegates(address delegator) external view returns (address) { return _delegates[delegator]; } /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegatee The address to delegate votes to */ function delegate(address delegatee) external { return _delegate(msg.sender, delegatee); } /** * @notice Delegates votes from signatory to `delegatee` * @param delegatee The address to delegate votes to * @param nonce The contract state required to match the signature * @param expiry The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function delegateBySig( address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s ) external { bytes32 domainSeparator = keccak256( abi.encode( DOMAIN_TYPEHASH, keccak256(bytes(name())), getChainId(), address(this) ) ); bytes32 structHash = keccak256( abi.encode( DELEGATION_TYPEHASH, delegatee, nonce, expiry ) ); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", domainSeparator, structHash ) ); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "BSWAP::delegateBySig: invalid signature"); require(nonce == nonces[signatory]++, "BSWAP::delegateBySig: invalid nonce"); require(now <= expiry, "BSWAP::delegateBySig: signature expired"); return _delegate(signatory, delegatee); } /** * @notice Gets the current votes balance for `account` * @param account The address to get votes balance * @return The number of current votes for `account` */ function getCurrentVotes(address account) external view returns (uint256) { uint32 nCheckpoints = numCheckpoints[account]; return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0; } /** * @notice Determine the prior number of votes for an account as of a block number * @dev Block number must be a finalized block or else this function will revert to prevent misinformation. * @param account The address of the account to check * @param blockNumber The block number to get the vote balance at * @return The number of votes the account had as of the given block */ function getPriorVotes(address account, uint blockNumber) external view returns (uint256) { require(blockNumber < block.number, "bswap::getPriorVotes: not yet determined"); uint32 nCheckpoints = numCheckpoints[account]; if (nCheckpoints == 0) { return 0; } // First check most recent balance if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) { return checkpoints[account][nCheckpoints - 1].votes; } // Next check implicit zero balance if (checkpoints[account][0].fromBlock > blockNumber) { return 0; } uint32 lower = 0; uint32 upper = nCheckpoints - 1; while (upper > lower) { uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow Checkpoint memory cp = checkpoints[account][center]; if (cp.fromBlock == blockNumber) { return cp.votes; } else if (cp.fromBlock < blockNumber) { lower = center; } else { upper = center - 1; } } return checkpoints[account][lower].votes; } function _delegate(address delegator, address delegatee) internal { address currentDelegate = _delegates[delegator]; uint256 delegatorBalance = balanceOf(delegator); _delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveDelegates(currentDelegate, delegatee, delegatorBalance); } function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal { if (srcRep != dstRep && amount > 0) { if (srcRep != address(0)) { // decrease old representative uint32 srcRepNum = numCheckpoints[srcRep]; uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0; uint256 srcRepNew = srcRepOld.sub(amount); _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew); } if (dstRep != address(0)) { // increase new representative uint32 dstRepNum = numCheckpoints[dstRep]; uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0; uint256 dstRepNew = dstRepOld.add(amount); _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew); } } } function _writeCheckpoint( address delegatee, uint32 nCheckpoints, uint256 oldVotes, uint256 newVotes ) internal { uint32 blockNumber = safe32(block.number, "bswap::_writeCheckpoint: block number exceeds 32 bits"); if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) { checkpoints[delegatee][nCheckpoints - 1].votes = newVotes; } else { checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes); numCheckpoints[delegatee] = nCheckpoints + 1; } emit DelegateVotesChanged(delegatee, oldVotes, newVotes); } function safe32(uint n, string memory errorMessage) internal pure returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function getChainId() internal pure returns (uint) { uint256 chainId; assembly { chainId := chainid() } return chainId; } /** * @dev Destroys `amount` tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 amount) public virtual returns (bool) { _burn(_msgSender(), amount); return true; } /** * @dev Destroys `amount` tokens from `account`, deducting from the caller's * allowance. * * See {ERC20-_burn} and {ERC20-allowance}. * * Requirements: * * - the caller must have allowance for ``accounts``'s tokens of at least * `amount`. */ function burnFrom(address account, uint256 amount) public virtual returns (bool) { uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance"); _approve(account, _msgSender(), decreasedAllowance); _burn(account, amount); return true; } function setTransferBurnRate(uint256 _tranferBurnRate) public onlyOwner { require(_tranferBurnRate <= 100, "Burning Rate on Transfer cannot be more than 100%"); transferBurnRate = _tranferBurnRate; } // In some circumstance, we should not burn bswap on transfer, eg: Transfer from owner to distribute bounty, from depositing to swap for liquidity function addTransferBurnExceptAddress(address _transferBurnExceptAddress) public onlyOwner { _transferBurnExceptAddresses[_transferBurnExceptAddress] = true; } function removeTransferBurnExceptAddress(address _transferBurnExceptAddress) public onlyOwner { delete _transferBurnExceptAddresses[_transferBurnExceptAddress]; } function startFarming() public onlyOwner { require(farmingEnabled == false, "Farming has been started already!"); lockFromBlock = block.number; lockToBlock = lockFromBlock + 2000; farmingEnabled = true; } constructor() public { lockFromBlock = 999999999; lockToBlock = 999999999; farmingEnabled = false; _mint(msg.sender, _initial_supply); // Mint 5000 bswap for bounty program _moveDelegates(address(0), msg.sender, _initial_supply); } } interface IMigratorToBSWAPSwap { // Perform LP token migration from legacy UniswapV2 to BSWAPSwap. // Take the current LP token address and return the new LP token address. // Migrator should have full access to the caller's LP token. // Return the new LP token address. // // XXX Migrator must have allowance access to UniswapV2 LP tokens. // BSWAPSwap must mint EXACTLY the same amount of BSWAPSwap LP tokens or // else something bad will happen. Traditional UniswapV2 does not // do that so be careful! function migrate(IERC20 token) external returns (IERC20); } // BSWAPMasterFarmer is the master of BSWAP. He can make BSWAP and he is a fair guy. // // Note that it's ownable and the owner wields tremendous power. The ownership // will be transferred to a governance smart contract once BSWAP is sufficiently // distributed and the community can show to govern itself. // // Have fun reading it. Hopefully it's bug-free. God bless. contract BSWAPMasterFarmer is Ownable { using SafeMath for uint256; using SafeERC20 for IERC20; // Info of each user. struct UserInfo { uint256 amount; // How many LP tokens the user has provided. uint256 rewardDebt; // Reward debt. See explanation below. uint256 rewardDebtAtBlock; // the last block user stake // // We do some fancy math here. Basically, any point in time, the amount of bswaps // entitled to a user but is pending to be distributed is: // // pending reward = (user.amount * pool.accBSWAPPerShare) - user.rewardDebt // // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens: // 1. The pool's `accBSWAPPerShare` (and `lastRewardBlock`) gets updated. // 2. User receives the pending reward sent to his/her address. // 3. User's `amount` gets updated. // 4. User's `rewardDebt` gets updated. } // Info of each pool. struct PoolInfo { IERC20 lpToken; // Address of LP token contract. uint256 allocPoint; // How many allocation points assigned to this pool. bswaps to distribute per block. uint256 lastRewardBlock; // Last block number that bswaps distribution occurs. uint256 accBSWAPPerShare; // Accumulated bswaps per share, times 1e12. See below. } uint256 private _totalLock; mapping(address => uint256) private _locks; mapping(address => uint256) private _lastUnlockBlock; // The BSWAP TOKEN! BSWAPToken public bswap; // Dev address. address public devaddr; // BSWAP tokens created per block. uint256 public REWARD_PER_BLOCK; // 1000000000000000000 // Bonus muliplier for early BSWAP makers. uint256[] public REWARD_MULTIPLIER = [8, 8, 8, 4, 4, 4, 2, 2, 2, 1]; uint256[] public HALVING_AT_BLOCK; // init in constructor function uint256 public FINISH_BONUS_AT_BLOCK; // The block number when BSWAP mining starts. uint256 public START_BLOCK; uint256 public constant PERCENT_LOCK_BONUS_REWARD = 75; // lock 75% of bounus reward in 1 year uint256 public constant PERCENT_FOR_DEV = 20; // 10% reward for dev uint256 public burnPercent = 0; // init 0% burn BSWAP uint256 public lockFromBlock; uint256 public lockToBlock; // The migrator contract. It has a lot of power. Can only be set through governance (owner). IMigratorToBSWAPSwap public migrator; // Info of each pool. PoolInfo[] public poolInfo; mapping(address => uint256) public poolId1; // poolId1 count from 1, subtraction 1 before using with poolInfo // Info of each user that stakes LP tokens. pid => user address => info mapping (uint256 => mapping (address => UserInfo)) public userInfo; // Total allocation poitns. Must be the sum of all allocation points in all pools. uint256 public totalAllocPoint = 0; event Deposit(address indexed user, uint256 indexed pid, uint256 amount); event Withdraw(address indexed user, uint256 indexed pid, uint256 amount); event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount); event SendBswapReward(address indexed user, uint256 indexed pid, uint256 amount, uint256 lockAmount); event Lock(address indexed to, uint256 value); constructor( BSWAPToken _bswap, address _devaddr ) public { bswap = _bswap; devaddr = _devaddr; } function initialize(uint256 _startBlock, uint256 _halvingAfterBlock, uint256 _rewardPerBlock) external onlyOwner { REWARD_PER_BLOCK = _rewardPerBlock; START_BLOCK = _startBlock; for (uint256 i = 0; i < REWARD_MULTIPLIER.length - 1; i++) { uint256 halvingAtBlock = _halvingAfterBlock.mul(i + 1).add(_startBlock); HALVING_AT_BLOCK.push(halvingAtBlock); } FINISH_BONUS_AT_BLOCK = _halvingAfterBlock.mul(REWARD_MULTIPLIER.length - 1).add(_startBlock); HALVING_AT_BLOCK.push(uint256(-1)); lockFromBlock = block.number + 10512000; lockToBlock = lockFromBlock + 10512000; } function poolLength() external view returns (uint256) { return poolInfo.length; } // Add a new lp to the pool. Can only be called by the owner. function add(uint256 _allocPoint, IERC20 _lpToken, bool _withUpdate) public onlyOwner { require(poolId1[address(_lpToken)] == 0, "BSWAPMasterFarmer::add: lp is already in pool"); if (_withUpdate) { massUpdatePools(); } uint256 lastRewardBlock = block.number > START_BLOCK ? block.number : START_BLOCK; totalAllocPoint = totalAllocPoint.add(_allocPoint); poolId1[address(_lpToken)] = poolInfo.length + 1; poolInfo.push(PoolInfo({ lpToken: _lpToken, allocPoint: _allocPoint, lastRewardBlock: lastRewardBlock, accBSWAPPerShare: 0 })); } // Update the given pool's BSWAP allocation point. Can only be called by the owner. function set(uint256 _pid, uint256 _allocPoint, bool _withUpdate) public onlyOwner { if (_withUpdate) { massUpdatePools(); } totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint); poolInfo[_pid].allocPoint = _allocPoint; } // Set the migrator contract. Can only be called by the owner. function setMigrator(IMigratorToBSWAPSwap _migrator) public onlyOwner { migrator = _migrator; } // Migrate lp token to another lp contract. Can be called by anyone. We trust that migrator contract is good. function migrate(uint256 _pid) public { require(address(migrator) != address(0), "migrate: no migrator"); PoolInfo storage pool = poolInfo[_pid]; IERC20 lpToken = pool.lpToken; uint256 bal = lpToken.balanceOf(address(this)); lpToken.safeApprove(address(migrator), bal); IERC20 newLpToken = migrator.migrate(lpToken); require(bal == newLpToken.balanceOf(address(this)), "migrate: bad"); pool.lpToken = newLpToken; } // Update reward variables for all pools. Be careful of gas spending! function massUpdatePools() public { uint256 length = poolInfo.length; for (uint256 pid = 0; pid < length; ++pid) { updatePool(pid); } } // Update reward variables of the given pool to be up-to-date. function updatePool(uint256 _pid) public { PoolInfo storage pool = poolInfo[_pid]; if (block.number <= pool.lastRewardBlock) { return; } uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (lpSupply == 0) { pool.lastRewardBlock = block.number; return; } uint256 bswapForBurn; uint256 bswapForDev; uint256 bswapForFarmer; (bswapForBurn, bswapForDev, bswapForFarmer) = getPoolReward(pool.lastRewardBlock, block.number, pool.allocPoint); if (bswapForBurn > 0) { bswap.mint(address(this), bswapForBurn); bswap.burn(bswapForBurn); } if (bswapForDev > 0) { // Mint unlocked amount for Dev bswap.mint(devaddr, bswapForDev.mul(100 - PERCENT_LOCK_BONUS_REWARD).div(100)); // Mint locked amount for Dev //For more simple, I lock reward for dev if mint reward in bonus time bswap.mint(address(this), bswapForDev.mul(PERCENT_LOCK_BONUS_REWARD).div(100)); farmLock(devaddr, bswapForDev.mul(PERCENT_LOCK_BONUS_REWARD).div(100)); } bswap.mint(address(this), bswapForFarmer); pool.accBSWAPPerShare = pool.accBSWAPPerShare.add(bswapForFarmer.mul(1e12).div(lpSupply)); pool.lastRewardBlock = block.number; } // |--------------------------------------| // [20, 30, 40, 50, 60, 70, 80, 99999999] // Return reward multiplier over the given _from to _to block. function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) { uint256 result = 0; if (_from < START_BLOCK) return 0; for (uint256 i = 0; i < HALVING_AT_BLOCK.length; i++) { uint256 endBlock = HALVING_AT_BLOCK[i]; if (_to <= endBlock) { uint256 m = _to.sub(_from).mul(REWARD_MULTIPLIER[i]); return result.add(m); } if (_from < endBlock) { uint256 m = endBlock.sub(_from).mul(REWARD_MULTIPLIER[i]); _from = endBlock; result = result.add(m); } } return result; } function getPoolReward(uint256 _from, uint256 _to, uint256 _allocPoint) public view returns (uint256 forBurn, uint256 forDev, uint256 forFarmer) { uint256 multiplier = getMultiplier(_from, _to); uint256 amount = multiplier.mul(REWARD_PER_BLOCK).mul(_allocPoint).div(totalAllocPoint); uint256 bswapCanMint = bswap.cap().sub(bswap.totalSupply()); if (bswapCanMint < amount) { forBurn = 0; forDev = 0; forFarmer = bswapCanMint; } else { forBurn = amount.mul(burnPercent).div(100); forDev = amount.mul(PERCENT_FOR_DEV).div(100); forFarmer = amount.mul(100 - burnPercent - PERCENT_FOR_DEV).div(100); } } // View function to see pending bswaps on frontend. function pendingReward(uint256 _pid, address _user) external view returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_user]; uint256 accBSWAPPerShare = pool.accBSWAPPerShare; uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (block.number > pool.lastRewardBlock && lpSupply > 0) { uint256 bswapForFarmer; (, , bswapForFarmer) = getPoolReward(pool.lastRewardBlock, block.number, pool.allocPoint); accBSWAPPerShare = accBSWAPPerShare.add(bswapForFarmer.mul(1e12).div(lpSupply)); } return user.amount.mul(accBSWAPPerShare).div(1e12).sub(user.rewardDebt); } function claimReward(uint256 _pid) public { updatePool(_pid); _harvest(_pid); } // lock 75% of reward if it come from bounus time function _harvest(uint256 _pid) internal { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; if (user.amount > 0) { uint256 pending = user.amount.mul(pool.accBSWAPPerShare).div(1e12).sub(user.rewardDebt); uint256 masterBal = bswap.balanceOf(address(this)); if (pending > masterBal) { pending = masterBal; } if(pending > 0) { bswap.transfer(msg.sender, pending.mul(100 - PERCENT_LOCK_BONUS_REWARD).div(100)); uint256 lockAmount = 0; if (user.rewardDebtAtBlock <= FINISH_BONUS_AT_BLOCK) { lockAmount = pending.mul(PERCENT_LOCK_BONUS_REWARD).div(100); farmLock(msg.sender, lockAmount); } user.rewardDebtAtBlock = block.number; emit SendBswapReward(msg.sender, _pid, pending, lockAmount); } user.rewardDebt = user.amount.mul(pool.accBSWAPPerShare).div(1e12); } } // Deposit LP tokens to BSWAPMasterFarmer for bswap allocation. function deposit(uint256 _pid, uint256 _amount) public { require(_amount > 0, "BSWAPMasterFarmer::deposit: amount must be greater than 0"); PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; updatePool(_pid); _harvest(_pid); pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount); if (user.amount == 0) { user.rewardDebtAtBlock = block.number; } user.amount = user.amount.add(_amount); user.rewardDebt = user.amount.mul(pool.accBSWAPPerShare).div(1e12); emit Deposit(msg.sender, _pid, _amount); } // Withdraw LP tokens from BSWAPMasterFarmer. function withdraw(uint256 _pid, uint256 _amount) public { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; require(user.amount >= _amount, "BSWAPMasterFarmer::withdraw: not good"); updatePool(_pid); _harvest(_pid); if(_amount > 0) { user.amount = user.amount.sub(_amount); pool.lpToken.safeTransfer(address(msg.sender), _amount); } user.rewardDebt = user.amount.mul(pool.accBSWAPPerShare).div(1e12); emit Withdraw(msg.sender, _pid, _amount); } // Withdraw without caring about rewards. EMERGENCY ONLY. function emergencyWithdraw(uint256 _pid) public { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; pool.lpToken.safeTransfer(address(msg.sender), user.amount); emit EmergencyWithdraw(msg.sender, _pid, user.amount); user.amount = 0; user.rewardDebt = 0; } // Safe bswap transfer function, just in case if rounding error causes pool to not have enough bswaps. function safebswapTransfer(address _to, uint256 _amount) internal { uint256 bswapBal = bswap.balanceOf(address(this)); if (_amount > bswapBal) { bswap.transfer(_to, bswapBal); } else { bswap.transfer(_to, _amount); } } // Update dev address by the previous dev. function dev(address _devaddr) public { require(msg.sender == devaddr, "dev: wut?"); devaddr = _devaddr; } function getNewRewardPerBlock(uint256 pid1) public view returns (uint256) { uint256 multiplier = getMultiplier(block.number -1, block.number); if (pid1 == 0) { return multiplier.mul(REWARD_PER_BLOCK); } else { return multiplier .mul(REWARD_PER_BLOCK) .mul(poolInfo[pid1 - 1].allocPoint) .div(totalAllocPoint); } } function setBurnPercent(uint256 _burnPercent) public onlyOwner { require(_burnPercent > burnPercent, "error: set burn percent"); burnPercent = _burnPercent; } function totalLock() public view returns (uint256) { return _totalLock; } function lockOf(address _holder) public view returns (uint256) { return _locks[_holder]; } function lastUnlockBlock(address _holder) public view returns (uint256) { return _lastUnlockBlock[_holder]; } function farmLock(address _holder, uint256 _amount) internal { require(_holder != address(0), "ERC20: lock to the zero address"); require(_amount <= bswap.balanceOf(address(this)), "ERC20: lock amount over blance"); _locks[_holder] = _locks[_holder].add(_amount); _totalLock = _totalLock.add(_amount); if (_lastUnlockBlock[_holder] < lockFromBlock) { _lastUnlockBlock[_holder] = lockFromBlock; } emit Lock(_holder, _amount); } function canUnlockAmount(address _holder) public view returns (uint256) { if (block.number < lockFromBlock) { return 0; } else if (block.number >= lockToBlock) { return _locks[_holder]; } else { uint256 releaseBlock = block.number.sub(_lastUnlockBlock[_holder]); uint256 numberLockBlock = lockToBlock.sub(_lastUnlockBlock[_holder]); return _locks[_holder].mul(releaseBlock).div(numberLockBlock); } } function unlock() public { require(_locks[msg.sender] > 0, "ERC20: cannot unlock"); uint256 amount = canUnlockAmount(msg.sender); // just for sure if (amount > bswap.balanceOf(address(this))) { amount = bswap.balanceOf(address(this)); } bswap.transfer(msg.sender, amount); _locks[msg.sender] = _locks[msg.sender].sub(amount); _lastUnlockBlock[msg.sender] = block.number; _totalLock = _totalLock.sub(amount); } function setTransferBurnRate(uint256 _tranferBurnRate) public onlyOwner { bswap.setTransferBurnRate(_tranferBurnRate); } // In some circumstance, we should not burn bswap on transfer, eg: Transfer from owner to distribute bounty, from depositing to swap for liquidity function addTransferBurnExceptAddress(address _transferBurnExceptAddress) public onlyOwner { bswap.addTransferBurnExceptAddress(_transferBurnExceptAddress); } function removeTransferBurnExceptAddress(address _transferBurnExceptAddress) public onlyOwner { bswap.removeTransferBurnExceptAddress(_transferBurnExceptAddress); } }
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_bswap","internalType":"contract BSWAPToken"},{"type":"address","name":"_devaddr","internalType":"address"}]},{"type":"event","name":"Deposit","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"EmergencyWithdraw","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Lock","inputs":[{"type":"address","name":"to","internalType":"address","indexed":true},{"type":"uint256","name":"value","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"SendBswapReward","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false},{"type":"uint256","name":"lockAmount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Withdraw","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"FINISH_BONUS_AT_BLOCK","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"HALVING_AT_BLOCK","inputs":[{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"PERCENT_FOR_DEV","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"PERCENT_LOCK_BONUS_REWARD","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"REWARD_MULTIPLIER","inputs":[{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"REWARD_PER_BLOCK","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"START_BLOCK","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"add","inputs":[{"type":"uint256","name":"_allocPoint","internalType":"uint256"},{"type":"address","name":"_lpToken","internalType":"contract IERC20"},{"type":"bool","name":"_withUpdate","internalType":"bool"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"addTransferBurnExceptAddress","inputs":[{"type":"address","name":"_transferBurnExceptAddress","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract BSWAPToken"}],"name":"bswap","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"burnPercent","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"canUnlockAmount","inputs":[{"type":"address","name":"_holder","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"claimReward","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"deposit","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"dev","inputs":[{"type":"address","name":"_devaddr","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"devaddr","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"emergencyWithdraw","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getMultiplier","inputs":[{"type":"uint256","name":"_from","internalType":"uint256"},{"type":"uint256","name":"_to","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getNewRewardPerBlock","inputs":[{"type":"uint256","name":"pid1","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"forBurn","internalType":"uint256"},{"type":"uint256","name":"forDev","internalType":"uint256"},{"type":"uint256","name":"forFarmer","internalType":"uint256"}],"name":"getPoolReward","inputs":[{"type":"uint256","name":"_from","internalType":"uint256"},{"type":"uint256","name":"_to","internalType":"uint256"},{"type":"uint256","name":"_allocPoint","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"initialize","inputs":[{"type":"uint256","name":"_startBlock","internalType":"uint256"},{"type":"uint256","name":"_halvingAfterBlock","internalType":"uint256"},{"type":"uint256","name":"_rewardPerBlock","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"lastUnlockBlock","inputs":[{"type":"address","name":"_holder","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"lockFromBlock","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"lockOf","inputs":[{"type":"address","name":"_holder","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"lockToBlock","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"massUpdatePools","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"migrate","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IMigratorToBSWAPSwap"}],"name":"migrator","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"pendingReward","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"address","name":"_user","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"poolId1","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"lpToken","internalType":"contract IERC20"},{"type":"uint256","name":"allocPoint","internalType":"uint256"},{"type":"uint256","name":"lastRewardBlock","internalType":"uint256"},{"type":"uint256","name":"accBSWAPPerShare","internalType":"uint256"}],"name":"poolInfo","inputs":[{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"poolLength","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"removeTransferBurnExceptAddress","inputs":[{"type":"address","name":"_transferBurnExceptAddress","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"set","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"uint256","name":"_allocPoint","internalType":"uint256"},{"type":"bool","name":"_withUpdate","internalType":"bool"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setBurnPercent","inputs":[{"type":"uint256","name":"_burnPercent","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setMigrator","inputs":[{"type":"address","name":"_migrator","internalType":"contract IMigratorToBSWAPSwap"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setTransferBurnRate","inputs":[{"type":"uint256","name":"_tranferBurnRate","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalAllocPoint","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalLock","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"unlock","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"updatePool","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"uint256","name":"rewardDebt","internalType":"uint256"},{"type":"uint256","name":"rewardDebtAtBlock","internalType":"uint256"}],"name":"userInfo","inputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"withdraw","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"uint256","name":"_amount","internalType":"uint256"}]}]
Contract Creation Code
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