pragmasolidity ^0.4.24;import"./ERC20Basic.sol";
import"./SafeMath.sol";
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/contractBasicTokenisERC20Basic{
usingSafeMathforuint256;
mapping(address=>uint256) internal balances;
uint256internal totalSupply_;
/**
* @dev Total number of tokens in existence
*/functiontotalSupply() publicviewreturns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/functiontransfer(address _to, uint256 _value) publicreturns (bool) {
require(_value <= balances[msg.sender]);
require(_to !=address(0));
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
returntrue;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/functionbalanceOf(address _owner) publicviewreturns (uint256) {
return balances[_owner];
}
}
pragmasolidity ^0.4.24;import"./MintableToken.sol";
/**
* @title Capped token
* @dev Mintable token with a token cap.
*/contractCappedTokenisMintableToken{
uint256public cap;
constructor(uint256 _cap) public{
require(_cap >0);
cap = _cap;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/functionmint(address _to,
uint256 _amount
)
publicreturns (bool)
{
require(totalSupply_.add(_amount) <= cap);
returnsuper.mint(_to, _amount);
}
}
pragmasolidity ^0.4.24;/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* See https://github.com/ethereum/EIPs/issues/179
*/contractERC20Basic{
functiontotalSupply() publicviewreturns (uint256);
functionbalanceOf(address _who) publicviewreturns (uint256);
functiontransfer(address _to, uint256 _value) publicreturns (bool);
eventTransfer(addressindexedfrom, addressindexed to, uint256 value);
}
Contract Source Code
File 6 of 9: MintableToken.sol
pragmasolidity ^0.4.24;import"./StandardToken.sol";
import"./Ownable.sol";
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/contractMintableTokenisStandardToken, Ownable{
eventMint(addressindexed to, uint256 amount);
eventMintFinished();
boolpublic mintingFinished =false;
modifiercanMint() {
require(!mintingFinished);
_;
}
modifierhasMintPermission() {
require(msg.sender== owner);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/functionmint(address _to,
uint256 _amount
)
publichasMintPermissioncanMintreturns (bool)
{
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
returntrue;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/functionfinishMinting() publiconlyOwnercanMintreturns (bool) {
mintingFinished =true;
emit MintFinished();
returntrue;
}
}
Contract Source Code
File 7 of 9: Ownable.sol
pragmasolidity ^0.4.24;/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/contractOwnable{
addresspublic owner;
eventOwnershipRenounced(addressindexed previousOwner);
eventOwnershipTransferred(addressindexed previousOwner,
addressindexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/constructor() public{
owner =msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/modifieronlyOwner() {
require(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.
*/functionrenounceOwnership() publiconlyOwner{
emit OwnershipRenounced(owner);
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.
*/functiontransferOwnership(address _newOwner) publiconlyOwner{
_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;
}
}
Contract Source Code
File 8 of 9: SafeMath.sol
pragmasolidity ^0.4.24;/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/librarySafeMath{
/**
* @dev Multiplies two numbers, throws on overflow.
*/functionmul(uint256 _a, uint256 _b) internalpurereturns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the// benefit is lost if 'b' is also tested.// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522if (_a ==0) {
return0;
}
c = _a * _b;
assert(c / _a == _b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/functiondiv(uint256 _a, uint256 _b) internalpurereturns (uint256) {
// assert(_b > 0); // Solidity automatically throws when dividing by 0// uint256 c = _a / _b;// assert(_a == _b * c + _a % _b); // There is no case in which this doesn't holdreturn _a / _b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/functionsub(uint256 _a, uint256 _b) internalpurereturns (uint256) {
assert(_b <= _a);
return _a - _b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/functionadd(uint256 _a, uint256 _b) internalpurereturns (uint256 c) {
c = _a + _b;
assert(c >= _a);
return c;
}
}
Contract Source Code
File 9 of 9: StandardToken.sol
pragmasolidity ^0.4.24;import"./BasicToken.sol";
import"./ERC20.sol";
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://github.com/ethereum/EIPs/issues/20
* Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/contractStandardTokenisERC20, BasicToken{
mapping (address=>mapping (address=>uint256)) internal allowed;
/**
* @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
*/functiontransferFrom(address _from,
address _to,
uint256 _value
)
publicreturns (bool)
{
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
require(_to !=address(0));
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
returntrue;
}
/**
* @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.
*/functionapprove(address _spender, uint256 _value) publicreturns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
returntrue;
}
/**
* @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.
*/functionallowance(address _owner,
address _spender
)
publicviewreturns (uint256)
{
return allowed[_owner][_spender];
}
/**
* @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.
*/functionincreaseApproval(address _spender,
uint256 _addedValue
)
publicreturns (bool)
{
allowed[msg.sender][_spender] = (
allowed[msg.sender][_spender].add(_addedValue));
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
returntrue;
}
/**
* @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.
*/functiondecreaseApproval(address _spender,
uint256 _subtractedValue
)
publicreturns (bool)
{
uint256 oldValue = allowed[msg.sender][_spender];
if (_subtractedValue >= oldValue) {
allowed[msg.sender][_spender] =0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
returntrue;
}
}