ERC-20
Overview
Max Total Supply
337,000,000 NCH
Holders
77
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 8 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0xB5c64c7d...AEc194B7b The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
BaseToken
Compiler Version
v0.4.24+commit.e67f0147
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2018-12-09 */ pragma solidity ^0.4.24; // File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function transfer(address to, uint256 value) external returns (bool); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) external returns (bool); event Transfer( address indexed from, address indexed to, uint256 value ); event Approval( address indexed owner, address indexed spender, uint256 value ); } // File: openzeppelin-solidity/contracts/token/ERC20/ERC20Detailed.sol /** * @title ERC20Detailed token * @dev The decimals are only for visualization purposes. * All the operations are done using the smallest and indivisible token unit, * just as on Ethereum all the operations are done in wei. */ contract ERC20Detailed is IERC20 { string private _name; string private _symbol; uint8 private _decimals; constructor(string name, string symbol, uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } /** * @return the name of the token. */ function name() public view returns(string) { return _name; } /** * @return the symbol of the token. */ function symbol() public view returns(string) { return _symbol; } /** * @return the number of decimals of the token. */ function decimals() public view returns(uint8) { return _decimals; } } // File: openzeppelin-solidity/contracts/math/SafeMath.sol /** * @title SafeMath * @dev Math operations with safety checks that revert on error */ library SafeMath { /** * @dev Multiplies two numbers, reverts on 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-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } /** * @dev Integer division of two numbers truncating the quotient, reverts on division by zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0); // Solidity only automatically asserts when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); uint256 c = a - b; return c; } /** * @dev Adds two numbers, reverts on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } /** * @dev Divides two numbers and returns the remainder (unsigned integer modulo), * reverts when dividing by zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0); return a % b; } } // File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md * Originally based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract ERC20 is IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowed; uint256 private _totalSupply; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return _totalSupply; } /** * @dev Gets the balance of the specified address. * @param owner The address to query the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address owner) public view returns (uint256) { return _balances[owner]; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param owner address The address which owns the funds. * @param spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address owner, address spender ) public view returns (uint256) { return _allowed[owner][spender]; } /** * @dev Transfer token for a specified address * @param to The address to transfer to. * @param value The amount to be transferred. */ function transfer(address to, uint256 value) public returns (bool) { _transfer(msg.sender, to, value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * 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 The address which will spend the funds. * @param value The amount of tokens to be spent. */ function approve(address spender, uint256 value) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } /** * @dev Transfer tokens from one address to another * @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 */ function transferFrom( address from, address to, uint256 value ) public returns (bool) { require(value <= _allowed[from][msg.sender]); _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value); _transfer(from, to, value); return true; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param spender The address which will spend the funds. * @param addedValue The amount of tokens to increase the allowance by. */ function increaseAllowance( address spender, uint256 addedValue ) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = ( _allowed[msg.sender][spender].add(addedValue)); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param spender The address which will spend the funds. * @param subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseAllowance( address spender, uint256 subtractedValue ) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = ( _allowed[msg.sender][spender].sub(subtractedValue)); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Transfer token for a specified addresses * @param from The address to transfer from. * @param to The address to transfer to. * @param value The amount to be transferred. */ function _transfer(address from, address to, uint256 value) internal { require(value <= _balances[from]); require(to != address(0)); _balances[from] = _balances[from].sub(value); _balances[to] = _balances[to].add(value); emit Transfer(from, to, value); } /** * @dev Internal function that mints an amount of the token and assigns it to * an account. This encapsulates the modification of balances such that the * proper events are emitted. * @param account The account that will receive the created tokens. * @param value The amount that will be created. */ function _mint(address account, uint256 value) internal { require(account != 0); _totalSupply = _totalSupply.add(value); _balances[account] = _balances[account].add(value); emit Transfer(address(0), account, value); } /** * @dev Internal function that burns an amount of the token of a given * account. * @param account The account whose tokens will be burnt. * @param value The amount that will be burnt. */ function _burn(address account, uint256 value) internal { require(account != 0); require(value <= _balances[account]); _totalSupply = _totalSupply.sub(value); _balances[account] = _balances[account].sub(value); emit Transfer(account, address(0), value); } /** * @dev Internal function that burns an amount of the token of a given * account, deducting from the sender's allowance for said account. Uses the * internal burn function. * @param account The account whose tokens will be burnt. * @param value The amount that will be burnt. */ function _burnFrom(address account, uint256 value) internal { require(value <= _allowed[account][msg.sender]); // Should https://github.com/OpenZeppelin/zeppelin-solidity/issues/707 be accepted, // this function needs to emit an event with the updated approval. _allowed[account][msg.sender] = _allowed[account][msg.sender].sub( value); _burn(account, value); } } // File: openzeppelin-solidity/contracts/access/Roles.sol /** * @title Roles * @dev Library for managing addresses assigned to a Role. */ library Roles { struct Role { mapping (address => bool) bearer; } /** * @dev give an account access to this role */ function add(Role storage role, address account) internal { require(account != address(0)); require(!has(role, account)); role.bearer[account] = true; } /** * @dev remove an account's access to this role */ function remove(Role storage role, address account) internal { require(account != address(0)); require(has(role, account)); role.bearer[account] = false; } /** * @dev check if an account has this role * @return bool */ function has(Role storage role, address account) internal view returns (bool) { require(account != address(0)); return role.bearer[account]; } } // File: openzeppelin-solidity/contracts/access/roles/MinterRole.sol contract MinterRole { using Roles for Roles.Role; event MinterAdded(address indexed account); event MinterRemoved(address indexed account); Roles.Role private minters; constructor() internal { _addMinter(msg.sender); } modifier onlyMinter() { require(isMinter(msg.sender)); _; } function isMinter(address account) public view returns (bool) { return minters.has(account); } function addMinter(address account) public onlyMinter { _addMinter(account); } function renounceMinter() public { _removeMinter(msg.sender); } function _addMinter(address account) internal { minters.add(account); emit MinterAdded(account); } function _removeMinter(address account) internal { minters.remove(account); emit MinterRemoved(account); } } // File: openzeppelin-solidity/contracts/token/ERC20/ERC20Mintable.sol /** * @title ERC20Mintable * @dev ERC20 minting logic */ contract ERC20Mintable is ERC20, MinterRole { /** * @dev Function to mint tokens * @param to The address that will receive the minted tokens. * @param value The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address to, uint256 value ) public onlyMinter returns (bool) { _mint(to, value); return true; } } // File: openzeppelin-solidity/contracts/token/ERC20/ERC20Capped.sol /** * @title Capped token * @dev Mintable token with a token cap. */ contract ERC20Capped is ERC20Mintable { uint256 private _cap; constructor(uint256 cap) public { require(cap > 0); _cap = cap; } /** * @return the cap for the token minting. */ function cap() public view returns(uint256) { return _cap; } function _mint(address account, uint256 value) internal { require(totalSupply().add(value) <= _cap); super._mint(account, value); } } // File: openzeppelin-solidity/contracts/token/ERC20/ERC20Burnable.sol /** * @title Burnable Token * @dev Token that can be irreversibly burned (destroyed). */ contract ERC20Burnable is ERC20 { /** * @dev Burns a specific amount of tokens. * @param value The amount of token to be burned. */ function burn(uint256 value) public { _burn(msg.sender, value); } /** * @dev Burns a specific amount of tokens from the target address and decrements allowance * @param from address The address which you want to send tokens from * @param value uint256 The amount of token to be burned */ function burnFrom(address from, uint256 value) public { _burnFrom(from, value); } } // File: openzeppelin-solidity/contracts/utils/Address.sol /** * Utility library of inline functions on addresses */ library Address { /** * Returns whether the target address is a contract * @dev This function will return false if invoked during the constructor of a contract, * as the code is not actually created until after the constructor finishes. * @param account address of the account to check * @return whether the target address is a contract */ function isContract(address account) internal view returns (bool) { uint256 size; // XXX Currently there is no better way to check if there is a contract in an address // than to check the size of the code at that address. // See https://ethereum.stackexchange.com/a/14016/36603 // for more details about how this works. // TODO Check this again before the Serenity release, because all addresses will be // contracts then. // solium-disable-next-line security/no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } } // File: openzeppelin-solidity/contracts/introspection/ERC165Checker.sol /** * @title ERC165Checker * @dev Use `using ERC165Checker for address`; to include this library * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md */ library ERC165Checker { // As per the EIP-165 spec, no interface should ever match 0xffffffff bytes4 private constant _InterfaceId_Invalid = 0xffffffff; bytes4 private constant _InterfaceId_ERC165 = 0x01ffc9a7; /** * 0x01ffc9a7 === * bytes4(keccak256('supportsInterface(bytes4)')) */ /** * @notice Query if a contract supports ERC165 * @param account The address of the contract to query for support of ERC165 * @return true if the contract at account implements ERC165 */ 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, _InterfaceId_ERC165) && !_supportsERC165Interface(account, _InterfaceId_Invalid); } /** * @notice Query if a contract implements an interface, also checks support of ERC165 * @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 Interface identification is specified in ERC-165. */ 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); } /** * @notice Query if a contract implements interfaces, also checks support of ERC165 * @param account The address of the contract to query for support of an interface * @param interfaceIds A list of interface identifiers, as specified in ERC-165 * @return true if the contract at account indicates support all interfaces in the * interfaceIds list, false otherwise * @dev Interface identification is specified in ERC-165. */ function _supportsAllInterfaces(address account, bytes4[] 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 the `supportsERC165` method in this library. * 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 success, bool result) { bytes memory encodedParams = abi.encodeWithSelector( _InterfaceId_ERC165, interfaceId ); // solium-disable-next-line security/no-inline-assembly assembly { let encodedParams_data := add(0x20, encodedParams) let encodedParams_size := mload(encodedParams) let output := mload(0x40) // Find empty storage location using "free memory pointer" mstore(output, 0x0) success := staticcall( 30000, // 30k gas account, // To addr encodedParams_data, encodedParams_size, output, 0x20 // Outputs are 32 bytes long ) result := mload(output) // Load the result } } } // File: openzeppelin-solidity/contracts/introspection/IERC165.sol /** * @title IERC165 * @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md */ interface IERC165 { /** * @notice Query if a contract implements an interface * @param interfaceId The interface identifier, as specified in ERC-165 * @dev Interface identification is specified in ERC-165. This function * uses less than 30,000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: openzeppelin-solidity/contracts/introspection/ERC165.sol /** * @title ERC165 * @author Matt Condon (@shrugs) * @dev Implements ERC165 using a lookup table. */ contract ERC165 is IERC165 { bytes4 private constant _InterfaceId_ERC165 = 0x01ffc9a7; /** * 0x01ffc9a7 === * bytes4(keccak256('supportsInterface(bytes4)')) */ /** * @dev a mapping of interface id to whether or not it's supported */ mapping(bytes4 => bool) private _supportedInterfaces; /** * @dev A contract implementing SupportsInterfaceWithLookup * implement ERC165 itself */ constructor() internal { _registerInterface(_InterfaceId_ERC165); } /** * @dev implement supportsInterface(bytes4) using a lookup table */ function supportsInterface(bytes4 interfaceId) external view returns (bool) { return _supportedInterfaces[interfaceId]; } /** * @dev internal method for registering an interface */ function _registerInterface(bytes4 interfaceId) internal { require(interfaceId != 0xffffffff); _supportedInterfaces[interfaceId] = true; } } // File: erc-payable-token/contracts/token/ERC1363/IERC1363.sol /** * @title IERC1363 Interface * @author Vittorio Minacori (https://github.com/vittominacori) * @dev Interface for a Payable Token contract as defined in * https://github.com/ethereum/EIPs/issues/1363 */ contract IERC1363 is IERC20, ERC165 { /* * 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) public 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 data) public returns (bool); // solium-disable-line max-len /** * @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) public returns (bool); // solium-disable-line max-len /** * @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 data) public returns (bool); // solium-disable-line max-len, arg-overflow /** * @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) public returns (bool); // solium-disable-line max-len /** * @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 data) public returns (bool); // solium-disable-line max-len } // File: erc-payable-token/contracts/token/ERC1363/IERC1363Receiver.sol /** * @title IERC1363Receiver Interface * @author Vittorio Minacori (https://github.com/vittominacori) * @dev Interface for any contract that wants to support transferAndCall or transferFromAndCall * from ERC1363 token contracts as defined in * https://github.com/ethereum/EIPs/issues/1363 */ contract 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 data) external returns (bytes4); // solium-disable-line max-len, arg-overflow } // File: erc-payable-token/contracts/token/ERC1363/IERC1363Spender.sol /** * @title IERC1363Spender Interface * @author Vittorio Minacori (https://github.com/vittominacori) * @dev Interface for any contract that wants to support approveAndCall * from ERC1363 token contracts as defined in * https://github.com/ethereum/EIPs/issues/1363 */ contract 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 data) external returns (bytes4); // solium-disable-line max-len } // File: erc-payable-token/contracts/token/ERC1363/ERC1363.sol /** * @title ERC1363 * @author Vittorio Minacori (https://github.com/vittominacori) * @dev Implementation of an ERC1363 interface */ contract ERC1363 is ERC20, IERC1363 { // solium-disable-line max-len 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 _InterfaceId_ERC1363Transfer = 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 _InterfaceId_ERC1363Approve = 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; constructor() public { // register the supported interfaces to conform to ERC1363 via ERC165 _registerInterface(_InterfaceId_ERC1363Transfer); _registerInterface(_InterfaceId_ERC1363Approve); } function transferAndCall( address to, uint256 value ) public returns (bool) { return transferAndCall(to, value, ""); } function transferAndCall( address to, uint256 value, bytes data ) public returns (bool) { require(transfer(to, value)); require( _checkAndCallTransfer( msg.sender, to, value, data ) ); return true; } function transferFromAndCall( address from, address to, uint256 value ) public returns (bool) { // solium-disable-next-line arg-overflow return transferFromAndCall(from, to, value, ""); } function transferFromAndCall( address from, address to, uint256 value, bytes data ) public returns (bool) { require(transferFrom(from, to, value)); require( _checkAndCallTransfer( from, to, value, data ) ); return true; } function approveAndCall( address spender, uint256 value ) public returns (bool) { return approveAndCall(spender, value, ""); } function approveAndCall( address spender, uint256 value, bytes data ) public returns (bool) { approve(spender, value); require( _checkAndCallApprove( spender, value, data ) ); 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 data ) internal returns (bool) { if (!to.isContract()) { return false; } bytes4 retval = IERC1363Receiver(to).onTransferReceived( msg.sender, 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 data ) internal returns (bool) { if (!spender.isContract()) { return false; } bytes4 retval = IERC1363Spender(spender).onApprovalReceived( msg.sender, value, data ); return (retval == _ERC1363_APPROVED); } } // File: openzeppelin-solidity/contracts/ownership/Ownable.sol /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address private _owner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() internal { _owner = msg.sender; emit OwnershipTransferred(address(0), _owner); } /** * @return the address of the owner. */ function owner() public view returns(address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner()); _; } /** * @return true if `msg.sender` is the owner of the contract. */ function isOwner() public view returns(bool) { return msg.sender == _owner; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0)); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } // File: eth-token-recover/contracts/TokenRecover.sol /** * @title TokenRecover * @author Vittorio Minacori (https://github.com/vittominacori) * @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: contracts/BaseToken.sol /** * @title BaseToken * @author Vittorio Minacori (https://github.com/vittominacori) * @dev Implementation of a BaseToken */ contract BaseToken is ERC20Detailed, ERC20Capped, ERC20Burnable, ERC1363, TokenRecover { // solium-disable-line max-len string public builtOn = "https://vittominacori.github.io/erc20-generator"; constructor( string name, string symbol, uint8 decimals, uint256 cap, uint256 initialBalance ) ERC20Detailed(name, symbol, decimals) ERC20Capped(cap) public { if (initialBalance > 0) { _mint(owner(), initialBalance); } } }
Contract Security Audit
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Contract Creation Code
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Swarm Source
bzzr://dbcc24d8245b945ac1d2f1e96e8e52bd60b5ea7b4bb99f58239bab6defe5423e
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