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@aragon/apps-payroll

Version:

_**Code in Github:**_ [aragon-apps/apps/payroll](https://github.com/aragon/aragon-apps/tree/master/future-apps/payroll)

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{ "contractName": "MiniMeTokenFactory", "abi": [ { "constant": false, "inputs": [ { "name": "_parentToken", "type": "address" }, { "name": "_snapshotBlock", "type": "uint256" }, { "name": "_tokenName", "type": "string" }, { "name": "_decimalUnits", "type": "uint8" }, { "name": "_tokenSymbol", "type": "string" }, { "name": "_transfersEnabled", "type": "bool" } ], "name": "createCloneToken", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" } ], "bytecode": 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"source": "pragma solidity ^0.4.24;\n\n/*\n Copyright 2016, Jordi Baylina\n This program is free software: you can redistribute it and/or modify\n it under the terms of the GNU General Public License as published by\n the Free Software Foundation, either version 3 of the License, or\n (at your option) any later version.\n This program is distributed in the hope that it will be useful,\n but WITHOUT ANY WARRANTY; without even the implied warranty of\n MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n GNU General Public License for more details.\n You should have received a copy of the GNU General Public License\n along with this program. If not, see <http://www.gnu.org/licenses/>.\n */\n\n/// @title MiniMeToken Contract\n/// @author Jordi Baylina\n/// @dev This token contract's goal is to make it easy for anyone to clone this\n/// token using the token distribution at a given block, this will allow DAO's\n/// and DApps to upgrade their features in a decentralized manner without\n/// affecting the original token\n/// @dev It is ERC20 compliant, but still needs to under go further testing.\n\nimport \"./ITokenController.sol\";\n\ncontract Controlled {\n /// @notice The address of the controller is the only address that can call\n /// a function with this modifier\n modifier onlyController {\n require(msg.sender == controller);\n _;\n }\n\n address public controller;\n\n function Controlled() public { controller = msg.sender;}\n\n /// @notice Changes the controller of the contract\n /// @param _newController The new controller of the contract\n function changeController(address _newController) onlyController public {\n controller = _newController;\n }\n}\n\ncontract ApproveAndCallFallBack {\n function receiveApproval(\n address from,\n uint256 _amount,\n address _token,\n bytes _data\n ) public;\n}\n\n/// @dev The actual token contract, the default controller is the msg.sender\n/// that deploys the contract, so usually this token will be deployed by a\n/// token controller contract, which Giveth will call a \"Campaign\"\ncontract MiniMeToken is Controlled {\n\n string public name; //The Token's name: e.g. DigixDAO Tokens\n uint8 public decimals; //Number of decimals of the smallest unit\n string public symbol; //An identifier: e.g. REP\n string public version = \"MMT_0.1\"; //An arbitrary versioning scheme\n\n\n /// @dev `Checkpoint` is the structure that attaches a block number to a\n /// given value, the block number attached is the one that last changed the\n /// value\n struct Checkpoint {\n\n // `fromBlock` is the block number that the value was generated from\n uint128 fromBlock;\n\n // `value` is the amount of tokens at a specific block number\n uint128 value;\n }\n\n // `parentToken` is the Token address that was cloned to produce this token;\n // it will be 0x0 for a token that was not cloned\n MiniMeToken public parentToken;\n\n // `parentSnapShotBlock` is the block number from the Parent Token that was\n // used to determine the initial distribution of the Clone Token\n uint public parentSnapShotBlock;\n\n // `creationBlock` is the block number that the Clone Token was created\n uint public creationBlock;\n\n // `balances` is the map that tracks the balance of each address, in this\n // contract when the balance changes the block number that the change\n // occurred is also included in the map\n mapping (address => Checkpoint[]) balances;\n\n // `allowed` tracks any extra transfer rights as in all ERC20 tokens\n mapping (address => mapping (address => uint256)) allowed;\n\n // Tracks the history of the `totalSupply` of the token\n Checkpoint[] totalSupplyHistory;\n\n // Flag that determines if the token is transferable or not.\n bool public transfersEnabled;\n\n // The factory used to create new clone tokens\n MiniMeTokenFactory public tokenFactory;\n\n////////////////\n// Constructor\n////////////////\n\n /// @notice Constructor to create a MiniMeToken\n /// @param _tokenFactory The address of the MiniMeTokenFactory contract that\n /// will create the Clone token contracts, the token factory needs to be\n /// deployed first\n /// @param _parentToken Address of the parent token, set to 0x0 if it is a\n /// new token\n /// @param _parentSnapShotBlock Block of the parent token that will\n /// determine the initial distribution of the clone token, set to 0 if it\n /// is a new token\n /// @param _tokenName Name of the new token\n /// @param _decimalUnits Number of decimals of the new token\n /// @param _tokenSymbol Token Symbol for the new token\n /// @param _transfersEnabled If true, tokens will be able to be transferred\n function MiniMeToken(\n MiniMeTokenFactory _tokenFactory,\n MiniMeToken _parentToken,\n uint _parentSnapShotBlock,\n string _tokenName,\n uint8 _decimalUnits,\n string _tokenSymbol,\n bool _transfersEnabled\n ) public\n {\n tokenFactory = _tokenFactory;\n name = _tokenName; // Set the name\n decimals = _decimalUnits; // Set the decimals\n symbol = _tokenSymbol; // Set the symbol\n parentToken = _parentToken;\n parentSnapShotBlock = _parentSnapShotBlock;\n transfersEnabled = _transfersEnabled;\n creationBlock = block.number;\n }\n\n\n///////////////////\n// ERC20 Methods\n///////////////////\n\n /// @notice Send `_amount` tokens to `_to` from `msg.sender`\n /// @param _to The address of the recipient\n /// @param _amount The amount of tokens to be transferred\n /// @return Whether the transfer was successful or not\n function transfer(address _to, uint256 _amount) public returns (bool success) {\n require(transfersEnabled);\n return doTransfer(msg.sender, _to, _amount);\n }\n\n /// @notice Send `_amount` tokens to `_to` from `_from` on the condition it\n /// is approved by `_from`\n /// @param _from The address holding the tokens being transferred\n /// @param _to The address of the recipient\n /// @param _amount The amount of tokens to be transferred\n /// @return True if the transfer was successful\n function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success) {\n\n // The controller of this contract can move tokens around at will,\n // this is important to recognize! Confirm that you trust the\n // controller of this contract, which in most situations should be\n // another open source smart contract or 0x0\n if (msg.sender != controller) {\n require(transfersEnabled);\n\n // The standard ERC 20 transferFrom functionality\n if (allowed[_from][msg.sender] < _amount)\n return false;\n allowed[_from][msg.sender] -= _amount;\n }\n return doTransfer(_from, _to, _amount);\n }\n\n /// @dev This is the actual transfer function in the token contract, it can\n /// only be called by other functions in this contract.\n /// @param _from The address holding the tokens being transferred\n /// @param _to The address of the recipient\n /// @param _amount The amount of tokens to be transferred\n /// @return True if the transfer was successful\n function doTransfer(address _from, address _to, uint _amount) internal returns(bool) {\n if (_amount == 0) {\n return true;\n }\n require(parentSnapShotBlock < block.number);\n // Do not allow transfer to 0x0 or the token contract itself\n require((_to != 0) && (_to != address(this)));\n // If the amount being transfered is more than the balance of the\n // account the transfer returns false\n var previousBalanceFrom = balanceOfAt(_from, block.number);\n if (previousBalanceFrom < _amount) {\n return false;\n }\n // Alerts the token controller of the transfer\n if (isContract(controller)) {\n // Adding the ` == true` makes the linter shut up so...\n require(ITokenController(controller).onTransfer(_from, _to, _amount) == true);\n }\n // First update the balance array with the new value for the address\n // sending the tokens\n updateValueAtNow(balances[_from], previousBalanceFrom - _amount);\n // Then update the balance array with the new value for the address\n // receiving the tokens\n var previousBalanceTo = balanceOfAt(_to, block.number);\n require(previousBalanceTo + _amount >= previousBalanceTo); // Check for overflow\n updateValueAtNow(balances[_to], previousBalanceTo + _amount);\n // An event to make the transfer easy to find on the blockchain\n Transfer(_from, _to, _amount);\n return true;\n }\n\n /// @param _owner The address that's balance is being requested\n /// @return The balance of `_owner` at the current block\n function balanceOf(address _owner) public constant returns (uint256 balance) {\n return balanceOfAt(_owner, block.number);\n }\n\n /// @notice `msg.sender` approves `_spender` to spend `_amount` tokens on\n /// its behalf. This is a modified version of the ERC20 approve function\n /// to be a little bit safer\n /// @param _spender The address of the account able to transfer the tokens\n /// @param _amount The amount of tokens to be approved for transfer\n /// @return True if the approval was successful\n function approve(address _spender, uint256 _amount) public returns (bool success) {\n require(transfersEnabled);\n\n // To change the approve amount you first have to reduce the addresses`\n // allowance to zero by calling `approve(_spender,0)` if it is not\n // already 0 to mitigate the race condition described here:\n // https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n require((_amount == 0) || (allowed[msg.sender][_spender] == 0));\n\n // Alerts the token controller of the approve function call\n if (isContract(controller)) {\n // Adding the ` == true` makes the linter shut up so...\n require(ITokenController(controller).onApprove(msg.sender, _spender, _amount) == true);\n }\n\n allowed[msg.sender][_spender] = _amount;\n Approval(msg.sender, _spender, _amount);\n return true;\n }\n\n /// @dev This function makes it easy to read the `allowed[]` map\n /// @param _owner The address of the account that owns the token\n /// @param _spender The address of the account able to transfer the tokens\n /// @return Amount of remaining tokens of _owner that _spender is allowed\n /// to spend\n function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {\n return allowed[_owner][_spender];\n }\n\n /// @notice `msg.sender` approves `_spender` to send `_amount` tokens on\n /// its behalf, and then a function is triggered in the contract that is\n /// being approved, `_spender`. This allows users to use their tokens to\n /// interact with contracts in one function call instead of two\n /// @param _spender The address of the contract able to transfer the tokens\n /// @param _amount The amount of tokens to be approved for transfer\n /// @return True if the function call was successful\n function approveAndCall(ApproveAndCallFallBack _spender, uint256 _amount, bytes _extraData) public returns (bool success) {\n require(approve(_spender, _amount));\n\n _spender.receiveApproval(\n msg.sender,\n _amount,\n this,\n _extraData\n );\n\n return true;\n }\n\n /// @dev This function makes it easy to get the total number of tokens\n /// @return The total number of tokens\n function totalSupply() public constant returns (uint) {\n return totalSupplyAt(block.number);\n }\n\n\n////////////////\n// Query balance and totalSupply in Hist