ERC-20
NFT
Overview
Max Total Supply
165,000,000 DGCL
Holders
4,370 (0.00%)
Market
Price
$0.00 @ 0.000000 ETH
Onchain Market Cap
$5,451.37
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
14,530.892756067768610141 DGCLValue
$0.48 ( ~0.000190236080792038 Eth) [0.0088%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
DGCLToken
Compiler Version
v0.6.2+commit.bacdbe57
Optimization Enabled:
No with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2020-11-20 */ // File: @openzeppelin/contracts/GSN/Context.sol pragma solidity ^0.6.0; /* * @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 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. */ contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor() internal {} function _msgSender() internal virtual view returns (address payable) { return msg.sender; } function _msgData() internal virtual view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // File: @openzeppelin/contracts/token/ERC20/IERC20.sol pragma solidity ^0.6.0; /** * @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/math/SafeMath.sol pragma solidity ^0.6.0; /** * @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) { // Solidity only automatically asserts when dividing by 0 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 pragma solidity ^0.6.2; /** * @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) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @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" ); } } // File: @openzeppelin/contracts/token/ERC20/ERC20.sol pragma solidity ^0.6.0; /** * @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 {ERC20MinterPauser}. * * 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 override view returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public override view 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 virtual override view 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 is 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 {} } // File: @openzeppelin/contracts/token/ERC20/ERC20Capped.sol pragma solidity ^0.6.0; /** * @dev Extension of {ERC20} that adds a cap to the supply of tokens. */ abstract contract ERC20Capped is ERC20 { uint256 private _cap; /** * @dev Sets the value of the `cap`. This value is immutable, it can only be * set once during construction. */ constructor(uint256 cap) public { require(cap > 0, "ERC20Capped: cap is 0"); _cap = cap; } /** * @dev Returns the cap on the token's total supply. */ function cap() public view returns (uint256) { return _cap; } /** * @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" ); } } } // File: @openzeppelin/contracts/token/ERC20/ERC20Burnable.sol pragma solidity ^0.6.0; /** * @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 decreasedAllowance = allowance(account, _msgSender()).sub( amount, "ERC20: burn amount exceeds allowance" ); _approve(account, _msgSender(), decreasedAllowance); _burn(account, amount); } } // File: @openzeppelin/contracts/introspection/IERC165.sol pragma solidity ^0.6.0; /** * @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: erc-payable-token/contracts/token/ERC1363/IERC1363.sol pragma solidity ^0.6.0; /** * @title IERC1363 Interface * @dev Interface for a Payable Token contract as defined in * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1363.md */ interface IERC1363 is IERC20, IERC165 { /* * Note: the ERC-165 identifier for this interface is 0x4bbee2df. * 0x4bbee2df === * bytes4(keccak256('transferAndCall(address,uint256)')) ^ * bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^ * bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^ * bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) */ /* * Note: the ERC-165 identifier for this interface is 0xfb9ec8ce. * 0xfb9ec8ce === * bytes4(keccak256('approveAndCall(address,uint256)')) ^ * bytes4(keccak256('approveAndCall(address,uint256,bytes)')) */ /** * @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver * @param to address The address which you want to transfer to * @param value uint256 The amount of tokens to be transferred * @return true unless throwing */ function transferAndCall(address to, uint256 value) external returns (bool); /** * @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver * @param to address The address which you want to transfer to * @param value uint256 The amount of tokens to be transferred * @param data bytes Additional data with no specified format, sent in call to `to` * @return true unless throwing */ function transferAndCall( address to, uint256 value, bytes calldata data ) external returns (bool); /** * @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver * @param from address The address which you want to send tokens from * @param to address The address which you want to transfer to * @param value uint256 The amount of tokens to be transferred * @return true unless throwing */ function transferFromAndCall( address from, address to, uint256 value ) external returns (bool); /** * @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver * @param from address The address which you want to send tokens from * @param to address The address which you want to transfer to * @param value uint256 The amount of tokens to be transferred * @param data bytes Additional data with no specified format, sent in call to `to` * @return true unless throwing */ function transferFromAndCall( address from, address to, uint256 value, 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 value uint256 The amount of tokens to be spent */ function approveAndCall(address spender, uint256 value) 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 value 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 value, bytes calldata data ) external returns (bool); } // File: erc-payable-token/contracts/token/ERC1363/IERC1363Receiver.sol pragma solidity ^0.6.0; /** * @title IERC1363Receiver Interface * @dev Interface for any contract that wants to support transferAndCall or transferFromAndCall * from ERC1363 token contracts as defined in * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1363.md */ interface IERC1363Receiver { /* * Note: the ERC-165 identifier for this interface is 0x88a7ca5c. * 0x88a7ca5c === bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)")) */ /** * @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 from address The address which are token transferred from * @param value 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 from, uint256 value, bytes calldata data ) external returns (bytes4); // solhint-disable-line max-line-length } // File: erc-payable-token/contracts/token/ERC1363/IERC1363Spender.sol pragma solidity ^0.6.0; /** * @title IERC1363Spender Interface * @dev Interface for any contract that wants to support approveAndCall * from ERC1363 token contracts as defined in * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1363.md */ interface IERC1363Spender { /* * Note: the ERC-165 identifier for this interface is 0x7b04a2d0. * 0x7b04a2d0 === bytes4(keccak256("onApprovalReceived(address,uint256,bytes)")) */ /** * @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 owner address The address which called `approveAndCall` function * @param value 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 owner, uint256 value, bytes calldata data ) external returns (bytes4); } // File: @openzeppelin/contracts/introspection/ERC165Checker.sol pragma solidity ^0.6.2; /** * @dev Library used to query support of an interface declared via {IERC165}. * * Note that these functions return the actual result of the query: they do not * `revert` if an interface is not supported. It is up to the caller to decide * what to do in these cases. */ library ERC165Checker { // As per the EIP-165 spec, no interface should ever match 0xffffffff bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff; /* * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7 */ bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; /** * @dev Returns true if `account` supports the {IERC165} interface, */ function supportsERC165(address account) internal view returns (bool) { // Any contract that implements ERC165 must explicitly indicate support of // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid return _supportsERC165Interface(account, _INTERFACE_ID_ERC165) && !_supportsERC165Interface(account, _INTERFACE_ID_INVALID); } /** * @dev Returns true if `account` supports the interface defined by * `interfaceId`. Support for {IERC165} itself is queried automatically. * * See {IERC165-supportsInterface}. */ function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) { // query support of both ERC165 as per the spec and support of _interfaceId return supportsERC165(account) && _supportsERC165Interface(account, interfaceId); } /** * @dev Returns true if `account` supports all the interfaces defined in * `interfaceIds`. Support for {IERC165} itself is queried automatically. * * Batch-querying can lead to gas savings by skipping repeated checks for * {IERC165} support. * * See {IERC165-supportsInterface}. */ function supportsAllInterfaces( address account, bytes4[] memory interfaceIds ) internal view returns (bool) { // query support of ERC165 itself if (!supportsERC165(account)) { return false; } // query support of each interface in _interfaceIds for (uint256 i = 0; i < interfaceIds.length; i++) { if (!_supportsERC165Interface(account, interfaceIds[i])) { return false; } } // all interfaces supported return true; } /** * @notice Query if a contract implements an interface, does not check ERC165 support * @param account The address of the contract to query for support of an interface * @param interfaceId The interface identifier, as specified in ERC-165 * @return true if the contract at account indicates support of the interface with * identifier interfaceId, false otherwise * @dev Assumes that account contains a contract that supports ERC165, otherwise * the behavior of this method is undefined. This precondition can be checked * with {supportsERC165}. * Interface identification is specified in ERC-165. */ function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) { // success determines whether the staticcall succeeded and result determines // whether the contract at account indicates support of _interfaceId (bool success, bool result) = _callERC165SupportsInterface( account, interfaceId ); return (success && result); } /** * @notice Calls the function with selector 0x01ffc9a7 (ERC165) and suppresses throw * @param account The address of the contract to query for support of an interface * @param interfaceId The interface identifier, as specified in ERC-165 * @return success true if the STATICCALL succeeded, false otherwise * @return result true if the STATICCALL succeeded and the contract at account * indicates support of the interface with identifier interfaceId, false otherwise */ function _callERC165SupportsInterface(address account, bytes4 interfaceId) private view returns (bool, bool) { bytes memory encodedParams = abi.encodeWithSelector( _INTERFACE_ID_ERC165, interfaceId ); (bool success, bytes memory result) = account.staticcall{gas: 30000}( encodedParams ); if (result.length < 32) return (false, false); return (success, abi.decode(result, (bool))); } } // File: @openzeppelin/contracts/introspection/ERC165.sol pragma solidity ^0.6.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts may inherit from this and call {_registerInterface} to declare * their support of an interface. */ contract ERC165 is IERC165 { /* * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7 */ bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; /** * @dev Mapping of interface ids to whether or not it's supported. */ mapping(bytes4 => bool) private _supportedInterfaces; constructor() internal { // Derived contracts need only register support for their own interfaces, // we register support for ERC165 itself here _registerInterface(_INTERFACE_ID_ERC165); } /** * @dev See {IERC165-supportsInterface}. * * Time complexity O(1), guaranteed to always use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) public override view returns (bool) { return _supportedInterfaces[interfaceId]; } /** * @dev Registers the contract as an implementer of the interface defined by * `interfaceId`. Support of the actual ERC165 interface is automatic and * registering its interface id is not required. * * See {IERC165-supportsInterface}. * * Requirements: * * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`). */ function _registerInterface(bytes4 interfaceId) internal virtual { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } } // File: erc-payable-token/contracts/token/ERC1363/ERC1363.sol pragma solidity ^0.6.0; /** * @title ERC1363 * @dev Implementation of an ERC1363 interface */ contract ERC1363 is ERC20, IERC1363, ERC165 { using Address for address; /* * Note: the ERC-165 identifier for this interface is 0x4bbee2df. * 0x4bbee2df === * bytes4(keccak256('transferAndCall(address,uint256)')) ^ * bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^ * bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^ * bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) */ bytes4 internal constant _INTERFACE_ID_ERC1363_TRANSFER = 0x4bbee2df; /* * Note: the ERC-165 identifier for this interface is 0xfb9ec8ce. * 0xfb9ec8ce === * bytes4(keccak256('approveAndCall(address,uint256)')) ^ * bytes4(keccak256('approveAndCall(address,uint256,bytes)')) */ bytes4 internal constant _INTERFACE_ID_ERC1363_APPROVE = 0xfb9ec8ce; // Equals to `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))` // which can be also obtained as `IERC1363Receiver(0).onTransferReceived.selector` bytes4 private constant _ERC1363_RECEIVED = 0x88a7ca5c; // Equals to `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))` // which can be also obtained as `IERC1363Spender(0).onApprovalReceived.selector` bytes4 private constant _ERC1363_APPROVED = 0x7b04a2d0; /** * @param name Name of the token * @param symbol A symbol to be used as ticker */ constructor(string memory name, string memory symbol) public payable ERC20(name, symbol) { // register the supported interfaces to conform to ERC1363 via ERC165 _registerInterface(_INTERFACE_ID_ERC1363_TRANSFER); _registerInterface(_INTERFACE_ID_ERC1363_APPROVE); } /** * @dev Transfer tokens to a specified address and then execute a callback on recipient. * @param to The address to transfer to. * @param value The amount to be transferred. * @return A boolean that indicates if the operation was successful. */ function transferAndCall(address to, uint256 value) public override returns (bool) { return transferAndCall(to, value, ""); } /** * @dev Transfer tokens to a specified address and then execute a callback on recipient. * @param to The address to transfer to * @param value 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 to, uint256 value, bytes memory data ) public override returns (bool) { transfer(to, value); require( _checkAndCallTransfer(_msgSender(), to, value, data), "ERC1363: _checkAndCallTransfer reverts" ); return true; } /** * @dev Transfer tokens from one address to another and then execute a callback on recipient. * @param from The address which you want to send tokens from * @param to The address which you want to transfer to * @param value The amount of tokens to be transferred * @return A boolean that indicates if the operation was successful. */ function transferFromAndCall( address from, address to, uint256 value ) public override returns (bool) { return transferFromAndCall(from, to, value, ""); } /** * @dev Transfer tokens from one address to another and then execute a callback on recipient. * @param from The address which you want to send tokens from * @param to The address which you want to transfer to * @param value 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 from, address to, uint256 value, bytes memory data ) public override returns (bool) { transferFrom(from, to, value); require( _checkAndCallTransfer(from, to, value, 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 value The amount allowed to be transferred * @return A boolean that indicates if the operation was successful. */ function approveAndCall(address spender, uint256 value) public override returns (bool) { return approveAndCall(spender, value, ""); } /** * @dev Approve spender to transfer tokens and then execute a callback on recipient. * @param spender The address allowed to transfer to. * @param value 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 value, bytes memory data ) public override returns (bool) { approve(spender, value); require( _checkAndCallApprove(spender, value, 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 from address Representing the previous owner of the given token value * @param to address Target address that will receive the tokens * @param value 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 from, address to, uint256 value, bytes memory data ) internal returns (bool) { if (!to.isContract()) { return false; } bytes4 retval = IERC1363Receiver(to).onTransferReceived( _msgSender(), from, value, data ); return (retval == _ERC1363_RECEIVED); } /** * @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 value 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 value, bytes memory data ) internal returns (bool) { if (!spender.isContract()) { return false; } bytes4 retval = IERC1363Spender(spender).onApprovalReceived( _msgSender(), value, data ); return (retval == _ERC1363_APPROVED); } } // File: @openzeppelin/contracts/access/Ownable.sol pragma solidity ^0.6.0; /** * @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. */ 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; } } // File: eth-token-recover/contracts/TokenRecover.sol pragma solidity ^0.6.0; /** * @title TokenRecover * @dev Allow to recover any ERC20 sent into the contract for error */ 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 onlyOwner { IERC20(tokenAddress).transfer(owner(), tokenAmount); } } // File: @openzeppelin/contracts/utils/EnumerableSet.sol pragma solidity ^0.6.0; /** * @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)); } } // File: @openzeppelin/contracts/access/AccessControl.sol pragma solidity ^0.6.0; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, _msgSender())); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. */ abstract contract AccessControl is Context { using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted( bytes32 indexed role, address indexed account, address indexed sender ); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked( bytes32 indexed role, address indexed account, address indexed sender ); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require( hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant" ); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require( hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke" ); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require( account == _msgSender(), "AccessControl: can only renounce roles for self" ); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } } // File: contracts/access/Roles.sol pragma solidity ^0.6.0; contract Roles is AccessControl { bytes32 public constant MINTER_ROLE = keccak256("MINTER"); bytes32 public constant OPERATOR_ROLE = keccak256("OPERATOR"); constructor() public { _setupRole(DEFAULT_ADMIN_ROLE, _msgSender()); _setupRole(MINTER_ROLE, _msgSender()); _setupRole(OPERATOR_ROLE, _msgSender()); } modifier onlyMinter() { require( hasRole(MINTER_ROLE, _msgSender()), "Roles: caller does not have the MINTER role" ); _; } modifier onlyOperator() { require( hasRole(OPERATOR_ROLE, _msgSender()), "Roles: caller does not have the OPERATOR role" ); _; } } // File: contracts/DGCLToken.sol pragma solidity ^0.6.0; // TOKEN NAME: DigiCol Token // SYMBOL: DGCL /** * @title DGCLToken * @dev Implementation of the DGCLToken */ contract DGCLToken is ERC20Capped, ERC20Burnable, ERC1363, Roles, TokenRecover { // indicates if minting is finished bool private _mintingFinished = false; // indicates if transfer is enabled bool private _transferEnabled = false; /** * @dev Emitted during finish minting */ event MintFinished(); /** * @dev Emitted during transfer enabling */ event TransferEnabled(); /** * @dev Tokens can be minted only before minting finished. */ modifier canMint() { require(!_mintingFinished, "DGCLToken: minting is finished"); _; } /** * @dev Tokens can be moved only after if transfer enabled or if you are an approved operator. */ modifier canTransfer(address from) { require( _transferEnabled || hasRole(OPERATOR_ROLE, from), "DGCLToken: transfer is not enabled or from does not have the OPERATOR role" ); _; } /** * @param name Name of the token * @param symbol A symbol to be used as ticker * @param decimals Number of decimals. All the operations are done using the smallest and indivisible token unit * @param cap Maximum number of tokens mintable * @param initialSupply Initial token supply * @param transferEnabled If transfer is enabled on token creation * @param mintingFinished If minting is finished after token creation */ constructor( string memory name, string memory symbol, uint8 decimals, uint256 cap, uint256 initialSupply, bool transferEnabled, bool mintingFinished ) public ERC20Capped(cap) ERC1363(name, symbol) { require( mintingFinished == false || cap == initialSupply, "DGCLToken: if finish minting, cap must be equal to initialSupply" ); _setupDecimals(decimals); if (initialSupply > 0) { _mint(owner(), initialSupply); } if (mintingFinished) { finishMinting(); } if (transferEnabled) { enableTransfer(); } } /** * @return if minting is finished or not. */ function mintingFinished() public view returns (bool) { return _mintingFinished; } /** * @return if transfer is enabled or not. */ function transferEnabled() public view returns (bool) { return _transferEnabled; } /** * @dev Function to mint tokens. * @param to The address that will receive the minted tokens * @param value The amount of tokens to mint */ function mint(address to, uint256 value) public canMint onlyMinter { _mint(to, value); } /** * @dev Transfer tokens to a specified address. * @param to The address to transfer to * @param value The amount to be transferred * @return A boolean that indicates if the operation was successful. */ function transfer(address to, uint256 value) public virtual override(ERC20) canTransfer(_msgSender()) returns (bool) { return super.transfer(to, value); } /** * @dev Transfer tokens from one address to another. * @param from The address which you want to send tokens from * @param to The address which you want to transfer to * @param value the amount of tokens to be transferred * @return A boolean that indicates if the operation was successful. */ function transferFrom( address from, address to, uint256 value ) public virtual override(ERC20) canTransfer(from) returns (bool) { return super.transferFrom(from, to, value); } /** * @dev Function to stop minting new tokens. */ function finishMinting() public canMint onlyOwner { _mintingFinished = true; emit MintFinished(); } /** * @dev Function to enable transfers. */ function enableTransfer() public onlyOwner { _transferEnabled = true; emit TransferEnabled(); } /** * @dev See {ERC20-_beforeTokenTransfer}. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual override(ERC20, ERC20Capped) { super._beforeTokenTransfer(from, to, amount); } }
Contract Security Audit
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000000000000000000000000000000000e000000000000000000000000000000000000000000000000000000000000001200000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000887c1bec4a1528c5000000000000000000000000000000000000000000000000887c1bec4a1528c500000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000d44696769436f6c20546f6b656e0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044447434c00000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : name (string): DigiCol Token
Arg [1] : symbol (string): DGCL
Arg [2] : decimals (uint8): 18
Arg [3] : cap (uint256): 165000000000000000000000000
Arg [4] : initialSupply (uint256): 165000000000000000000000000
Arg [5] : transferEnabled (bool): True
Arg [6] : mintingFinished (bool): True
-----Encoded View---------------
11 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [3] : 000000000000000000000000000000000000000000887c1bec4a1528c5000000
Arg [4] : 000000000000000000000000000000000000000000887c1bec4a1528c5000000
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [7] : 000000000000000000000000000000000000000000000000000000000000000d
Arg [8] : 44696769436f6c20546f6b656e00000000000000000000000000000000000000
Arg [9] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [10] : 4447434c00000000000000000000000000000000000000000000000000000000
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