17.64
($1.97%)
| 1 Gwei
// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023. // SPDX-License-Identifier: Unlicensed pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: @openzeppelin/contracts/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/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) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // File: @openzeppelin/contracts/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 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, 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 defaut 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: * * - `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); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); _approve(sender, _msgSender(), currentAllowance - 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) { _approve(_msgSender(), spender, _allowances[_msgSender()][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) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); _approve(_msgSender(), spender, currentAllowance - subtractedValue); 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); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); _balances[sender] = senderBalance - amount; _balances[recipient] += 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 += amount; _balances[account] += 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); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); _balances[account] = accountBalance - amount; _totalSupply -= 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 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 { } } // File: @openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol pragma solidity ^0.8.0; /** * @dev Extension of {ERC20} that allows token holders to destroy both their own * tokens and those that they have an allowance for, in a way that can be * recognized off-chain (via event analysis). */ abstract contract ERC20Burnable is Context, ERC20 { /** * @dev Destroys `amount` tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 amount) public virtual { _burn(_msgSender(), amount); } /** * @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 { uint256 currentAllowance = allowance(account, _msgSender()); require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance"); _approve(account, _msgSender(), currentAllowance - amount); _burn(account, amount); } } // File: @openzeppelin/contracts/utils/Address.sol pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // 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"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (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"); // solhint-disable-next-line avoid-low-level-calls (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"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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 // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: @openzeppelin/contracts/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 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: erc-payable-token/contracts/token/ERC1363/IERC1363.sol pragma solidity ^0.8.0; /** * @title IERC1363 Interface * @dev Interface for a Payable Token contract as defined in * https://eips.ethereum.org/EIPS/eip-1363 */ interface IERC1363 is IERC20, IERC165 { /** * @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver * @param recipient address The address which you want to transfer to * @param amount uint256 The amount of tokens to be transferred * @return true unless throwing */ function transferAndCall(address recipient, uint256 amount) external returns (bool); /** * @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver * @param recipient address The address which you want to transfer to * @param amount uint256 The amount of tokens to be transferred * @param data bytes Additional data with no specified format, sent in call to `recipient` * @return true unless throwing */ function transferAndCall( address recipient, uint256 amount, bytes calldata data ) external returns (bool); /** * @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver * @param sender address The address which you want to send tokens from * @param recipient address The address which you want to transfer to * @param amount uint256 The amount of tokens to be transferred * @return true unless throwing */ function transferFromAndCall( address sender, address recipient, uint256 amount ) external returns (bool); /** * @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver * @param sender address The address which you want to send tokens from * @param recipient address The address which you want to transfer to * @param amount uint256 The amount of tokens to be transferred * @param data bytes Additional data with no specified format, sent in call to `recipient` * @return true unless throwing */ function transferFromAndCall( address sender, address recipient, uint256 amount, bytes calldata data ) external returns (bool); /** * @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender * and then call `onApprovalReceived` on spender. * 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 * @param spender address The address which will spend the funds * @param amount uint256 The amount of tokens to be spent */ function approveAndCall(address spender, uint256 amount) external returns (bool); /** * @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender * and then call `onApprovalReceived` on spender. * 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 * @param spender address The address which will spend the funds * @param amount uint256 The amount of tokens to be spent * @param data bytes Additional data with no specified format, sent in call to `spender` */ function approveAndCall( address spender, uint256 amount, bytes calldata data ) external returns (bool); } // File: erc-payable-token/contracts/token/ERC1363/IERC1363Receiver.sol pragma solidity ^0.8.0; /** * @title IERC1363Receiver Interface * @dev Interface for any contract that wants to support transferAndCall or transferFromAndCall * from ERC1363 token contracts as defined in * https://eips.ethereum.org/EIPS/eip-1363 */ interface IERC1363Receiver { /** * @notice Handle the receipt of ERC1363 tokens * @dev Any ERC1363 smart contract calls this function on the recipient * after a `transfer` or a `transferFrom`. This function MAY throw to revert and reject the * transfer. Return of other than the magic value MUST result in the * transaction being reverted. * Note: the token contract address is always the message sender. * @param operator address The address which called `transferAndCall` or `transferFromAndCall` function * @param sender address The address which are token transferred from * @param amount uint256 The amount of tokens transferred * @param data bytes Additional data with no specified format * @return `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))` unless throwing */ function onTransferReceived( address operator, address sender, uint256 amount, bytes calldata data ) external returns (bytes4); } // File: erc-payable-token/contracts/token/ERC1363/IERC1363Spender.sol pragma solidity ^0.8.0; /** * @title IERC1363Spender Interface * @dev Interface for any contract that wants to support approveAndCall * from ERC1363 token contracts as defined in * https://eips.ethereum.org/EIPS/eip-1363 */ interface IERC1363Spender { /** * @notice Handle the approval of ERC1363 tokens * @dev Any ERC1363 smart contract calls this function on the recipient * after an `approve`. This function MAY throw to revert and reject the * approval. Return of other than the magic value MUST result in the * transaction being reverted. * Note: the token contract address is always the message sender. * @param sender address The address which called `approveAndCall` function * @param amount uint256 The amount of tokens to be spent * @param data bytes Additional data with no specified format * @return `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))` unless throwing */ function onApprovalReceived( address sender, uint256 amount, bytes calldata data ) external returns (bytes4); } // File: erc-payable-token/contracts/token/ERC1363/ERC1363.sol pragma solidity ^0.8.0; /** * @title ERC1363 * @dev Implementation of an ERC1363 interface */ abstract contract ERC1363 is ERC20, IERC1363, ERC165 { using Address for address; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC1363).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Transfer tokens to a specified address and then execute a callback on recipient. * @param recipient The address to transfer to. * @param amount The amount to be transferred. * @return A boolean that indicates if the operation was successful. */ function transferAndCall(address recipient, uint256 amount) public virtual override returns (bool) { return transferAndCall(recipient, amount, ""); } /** * @dev Transfer tokens to a specified address and then execute a callback on recipient. * @param recipient The address to transfer to * @param amount The amount to be transferred * @param data Additional data with no specified format * @return A boolean that indicates if the operation was successful. */ function transferAndCall( address recipient, uint256 amount, bytes memory data ) public virtual override returns (bool) { transfer(recipient, amount); require(_checkAndCallTransfer(_msgSender(), recipient, amount, data), "ERC1363: _checkAndCallTransfer reverts"); return true; } /** * @dev Transfer tokens from one address to another and then execute a callback on recipient. * @param sender The address which you want to send tokens from * @param recipient The address which you want to transfer to * @param amount The amount of tokens to be transferred * @return A boolean that indicates if the operation was successful. */ function transferFromAndCall( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { return transferFromAndCall(sender, recipient, amount, ""); } /** * @dev Transfer tokens from one address to another and then execute a callback on recipient. * @param sender The address which you want to send tokens from * @param recipient The address which you want to transfer to * @param amount The amount of tokens to be transferred * @param data Additional data with no specified format * @return A boolean that indicates if the operation was successful. */ function transferFromAndCall( address sender, address recipient, uint256 amount, bytes memory data ) public virtual override returns (bool) { transferFrom(sender, recipient, amount); require(_checkAndCallTransfer(sender, recipient, amount, data), "ERC1363: _checkAndCallTransfer reverts"); return true; } /** * @dev Approve spender to transfer tokens and then execute a callback on recipient. * @param spender The address allowed to transfer to * @param amount The amount allowed to be transferred * @return A boolean that indicates if the operation was successful. */ function approveAndCall(address spender, uint256 amount) public virtual override returns (bool) { return approveAndCall(spender, amount, ""); } /** * @dev Approve spender to transfer tokens and then execute a callback on recipient. * @param spender The address allowed to transfer to. * @param amount The amount allowed to be transferred. * @param data Additional data with no specified format. * @return A boolean that indicates if the operation was successful. */ function approveAndCall( address spender, uint256 amount, bytes memory data ) public virtual override returns (bool) { approve(spender, amount); require(_checkAndCallApprove(spender, amount, data), "ERC1363: _checkAndCallApprove reverts"); return true; } /** * @dev Internal function to invoke `onTransferReceived` on a target address * The call is not executed if the target address is not a contract * @param sender address Representing the previous owner of the given token value * @param recipient address Target address that will receive the tokens * @param amount uint256 The amount mount of tokens to be transferred * @param data bytes Optional data to send along with the call * @return whether the call correctly returned the expected magic value */ function _checkAndCallTransfer( address sender, address recipient, uint256 amount, bytes memory data ) internal virtual returns (bool) { if (!recipient.isContract()) { return false; } bytes4 retval = IERC1363Receiver(recipient).onTransferReceived(_msgSender(), sender, amount, data); return (retval == IERC1363Receiver(recipient).onTransferReceived.selector); } /** * @dev Internal function to invoke `onApprovalReceived` on a target address * The call is not executed if the target address is not a contract * @param spender address The address which will spend the funds * @param amount uint256 The amount of tokens to be spent * @param data bytes Optional data to send along with the call * @return whether the call correctly returned the expected magic value */ function _checkAndCallApprove( address spender, uint256 amount, bytes memory data ) internal virtual returns (bool) { if (!spender.isContract()) { return false; } bytes4 retval = IERC1363Spender(spender).onApprovalReceived(_msgSender(), amount, data); return (retval == IERC1363Spender(spender).onApprovalReceived.selector); } } // File: @openzeppelin/contracts/access/Ownable.sol pragma solidity ^0.8.0; /** * @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. */ abstract contract Ownable is Context { address public _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Returns the address of the current owner. */ function owner() public view virtual 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; } } // File: eth-token-recover/contracts/TokenRecover.sol pragma solidity ^0.8.0; /** * @title TokenRecover * @dev Allows owner to recover any ERC20 sent into the contract */ contract TokenRecover is Ownable { /** * @dev Remember that only owner can call so be careful when use on contracts generated from other contracts. * @param tokenAddress The token contract address * @param tokenAmount Number of tokens to be sent */ function recoverERC20(address tokenAddress, uint256 tokenAmount) public virtual onlyOwner { IERC20(tokenAddress).transfer(owner(), tokenAmount); } } // File: contracts/token/ERC20/behaviours/ERC20Decimals.sol pragma solidity ^0.8.0; /** * @title ERC20Decimals * @dev Implementation of the ERC20Decimals. Extension of {ERC20} that adds decimals storage slot. */ abstract contract ERC20Decimals is ERC20 { uint8 private immutable _decimals; /** * @dev Sets the value of the `decimals`. This value is immutable, it can only be * set once during construction. */ constructor(uint8 decimals_) { _decimals = decimals_; } function decimals() public view virtual override returns (uint8) { return _decimals; } } // File: contracts/token/ERC20/behaviours/ERC20Mintable.sol pragma solidity ^0.8.0; /** * @title ERC20Mintable * @dev Implementation of the ERC20Mintable. Extension of {ERC20} that adds a minting behaviour. */ abstract contract ERC20Mintable is ERC20 { // indicates if minting is finished bool private _mintingFinished = false; /** * @dev Emitted during finish minting */ event MintFinished(); /** * @dev Tokens can be minted only before minting finished. */ modifier canMint() { require(!_mintingFinished, "ERC20Mintable: minting is finished"); _; } /** * @return if minting is finished or not. */ function mintingFinished() external view returns (bool) { return _mintingFinished; } /** * @dev Function to mint tokens. * * WARNING: it allows everyone to mint new tokens. Access controls MUST be defined in derived contracts. * * @param account The address that will receive the minted tokens * @param amount The amount of tokens to mint */ function mint(address account, uint256 amount) external canMint { _mint(account, amount); } /** * @dev Function to stop minting new tokens. * * WARNING: it allows everyone to finish minting. Access controls MUST be defined in derived contracts. */ function finishMinting() external canMint { _finishMinting(); } /** * @dev Function to stop minting new tokens. */ function _finishMinting() internal virtual { _mintingFinished = true; emit MintFinished(); } } pragma solidity ^0.8.0; contract CoinToken is ERC20Decimals, ERC20Mintable, ERC20Burnable, ERC1363, TokenRecover { constructor( string memory name_, string memory symbol_, uint8 decimals_, uint256 initialBalance_, address tokenOwner, address payable feeReceiver_ ) payable ERC20(name_, symbol_) ERC20Decimals(decimals_) { payable(feeReceiver_).transfer(msg.value); _owner = tokenOwner; _mint(tokenOwner, initialBalance_*10**uint256(decimals_)); } function decimals() public view virtual override(ERC20, ERC20Decimals) returns (uint8) { return super.decimals(); } /** * @dev Function to mint tokens. * * NOTE: restricting access to addresses with MINTER role. See {ERC20Mintable-mint}. * * @param account The address that will receive the minted tokens * @param amount The amount of tokens to mint */ function _mint(address account, uint256 amount) internal override onlyOwner { super._mint(account, amount); } /** * @dev Function to stop minting new tokens. * * NOTE: restricting access to owner only. See {ERC20Mintable-finishMinting}. */ function _finishMinting() internal override onlyOwner { super._finishMinting(); } }
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