Contract Source Code:
File 1 of 1 : CardToken
pragma solidity ^0.4.8;
contract tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData); }
contract owned {
address public owner;
function owned() {
owner = msg.sender;
}
modifier onlyOwner {
if (msg.sender != owner) throw;
_;
}
function transferOwnership(address newOwner) onlyOwner {
owner = newOwner;
}
}
contract CardToken is owned {
string public standard = 'Token 0.1';
string public name;
string public symbol;
string public ipfs_hash;
string public description;
bool public isLocked;
uint8 public decimals;
uint256 public totalSupply;
/* This creates an array with all balances */
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
/* This generates a public event on the blockchain that will notify clients */
event Transfer(address indexed from, address indexed to, uint256 value);
/* Initializes contract with initial supply tokens to the creator of the contract */
function CardToken(
uint256 initialSupply,
string tokenName,
string tokenSymbol,
string tokenDescription,
string ipfsHash
) {
balanceOf[msg.sender] = initialSupply; // Give the creator all initial tokens
totalSupply = initialSupply; // Update total supply
name = tokenName; // Set the name for display purposes
symbol = tokenSymbol; // Set the symbol for display purposes (first three as name or three char combo)
description = tokenDescription; //Description in gallery
ipfs_hash = ipfsHash;
decimals = 0; // Amount of decimals for display purposes
}
/* Send coins */
function transfer(address _to, uint256 _value) {
if (balanceOf[msg.sender] < _value) throw; // Check if the sender has enough
if (balanceOf[_to] + _value < balanceOf[_to]) throw; // Check for overflows
balanceOf[msg.sender] -= _value; // Subtract from the sender
balanceOf[_to] += _value; // Add the same to the recipient
}
/* Allow another contract to spend some tokens in your behalf */
function approve(address _spender, uint256 _value)
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/* Approve and then comunicate the approved contract in a single tx */
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/* A contract attempts to get the coins */
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
if (balanceOf[_from] < _value) throw; // Check if the sender has enough
if (balanceOf[_to] + _value < balanceOf[_to]) throw; // Check for overflows
if (_value > allowance[_from][msg.sender]) throw; // Check allowance
balanceOf[_from] -= _value; // Subtract from the sender
balanceOf[_to] += _value; // Add the same to the recipient
allowance[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
}
function mintToken(address target, uint256 mintedAmount) onlyOwner {
if (isLocked) { throw; }
balanceOf[target] += mintedAmount;
totalSupply += mintedAmount;
Transfer(0, this, mintedAmount);
Transfer(this, target, mintedAmount);
}
function lock() onlyOwner {
isLocked = true;
}
function setDescription(string desc) onlyOwner {
description = desc;
}
/* This unnamed function is called whenever someone tries to send ether to it */
function () {
throw; // Prevents accidental sending of ether
}
}
contract CardFactory {
address[] public Cards;
uint256 public CardCount;
function CardFactory() {
CardCount = 0;
}
function CreateCard(uint256 _initialAmount, string _name, string _symbol, string _desc,string _ipfshash) returns (address) {
CardToken newToken = (new CardToken(_initialAmount, _name,_symbol, _desc,_ipfshash));
Cards.push(address(newToken));
CardCount++;
newToken.transferOwnership(msg.sender);
newToken.transfer(msg.sender, _initialAmount); //the factory will own the created tokens. You must transfer them.
return address(newToken);
}
function () {
throw; // Prevents accidental sending of ether
}
}