Contract Source Code:
File 1 of 1 : GoodDollar
// File: openzeppelin-solidity/contracts/access/Roles.sol
pragma solidity ^0.5.0;
/**
* @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/math/SafeMath.sol
pragma solidity ^0.5.0;
/**
* @title SafeMath
* @dev Unsigned math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two unsigned integers, 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 unsigned integers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 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 unsigned integers, 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 unsigned integers, 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 unsigned integers 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/access/roles/PauserRole.sol
pragma solidity ^0.5.0;
contract PauserRole {
using Roles for Roles.Role;
event PauserAdded(address indexed account);
event PauserRemoved(address indexed account);
Roles.Role private _pausers;
constructor () internal {
_addPauser(msg.sender);
}
modifier onlyPauser() {
require(isPauser(msg.sender));
_;
}
function isPauser(address account) public view returns (bool) {
return _pausers.has(account);
}
function addPauser(address account) public onlyPauser {
_addPauser(account);
}
function renouncePauser() public {
_removePauser(msg.sender);
}
function _addPauser(address account) internal {
_pausers.add(account);
emit PauserAdded(account);
}
function _removePauser(address account) internal {
_pausers.remove(account);
emit PauserRemoved(account);
}
}
// File: openzeppelin-solidity/contracts/lifecycle/Pausable.sol
pragma solidity ^0.5.0;
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is PauserRole {
event Paused(address account);
event Unpaused(address account);
bool private _paused;
constructor () internal {
_paused = false;
}
/**
* @return true if the contract is paused, false otherwise.
*/
function paused() public view returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!_paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(_paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyPauser whenNotPaused {
_paused = true;
emit Paused(msg.sender);
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyPauser whenPaused {
_paused = false;
emit Unpaused(msg.sender);
}
}
// File: openzeppelin-solidity/contracts/ownership/Ownable.sol
pragma solidity ^0.5.0;
/**
* @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: @daostack/infra/contracts/Reputation.sol
pragma solidity ^0.5.4;
/**
* @title Reputation system
* @dev A DAO has Reputation System which allows peers to rate other peers in order to build trust .
* A reputation is use to assign influence measure to a DAO'S peers.
* Reputation is similar to regular tokens but with one crucial difference: It is non-transferable.
* The Reputation contract maintain a map of address to reputation value.
* It provides an onlyOwner functions to mint and burn reputation _to (or _from) a specific address.
*/
contract Reputation is Ownable {
uint8 public decimals = 18; //Number of decimals of the smallest unit
// Event indicating minting of reputation to an address.
event Mint(address indexed _to, uint256 _amount);
// Event indicating burning of reputation for an address.
event Burn(address indexed _from, uint256 _amount);
/// @dev `Checkpoint` is the structure that attaches a block number to a
/// given value, the block number attached is the one that last changed the
/// value
struct Checkpoint {
// `fromBlock` is the block number that the value was generated from
uint128 fromBlock;
// `value` is the amount of reputation at a specific block number
uint128 value;
}
// `balances` is the map that tracks the balance of each address, in this
// contract when the balance changes the block number that the change
// occurred is also included in the map
mapping (address => Checkpoint[]) balances;
// Tracks the history of the `totalSupply` of the reputation
Checkpoint[] totalSupplyHistory;
/// @notice Constructor to create a Reputation
constructor(
) public
{
}
/// @dev This function makes it easy to get the total number of reputation
/// @return The total number of reputation
function totalSupply() public view returns (uint256) {
return totalSupplyAt(block.number);
}
////////////////
// Query balance and totalSupply in History
////////////////
/**
* @dev return the reputation amount of a given owner
* @param _owner an address of the owner which we want to get his reputation
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balanceOfAt(_owner, block.number);
}
/// @dev Queries the balance of `_owner` at a specific `_blockNumber`
/// @param _owner The address from which the balance will be retrieved
/// @param _blockNumber The block number when the balance is queried
/// @return The balance at `_blockNumber`
function balanceOfAt(address _owner, uint256 _blockNumber)
public view returns (uint256)
{
if ((balances[_owner].length == 0) || (balances[_owner][0].fromBlock > _blockNumber)) {
return 0;
// This will return the expected balance during normal situations
} else {
return getValueAt(balances[_owner], _blockNumber);
}
}
/// @notice Total amount of reputation at a specific `_blockNumber`.
/// @param _blockNumber The block number when the totalSupply is queried
/// @return The total amount of reputation at `_blockNumber`
function totalSupplyAt(uint256 _blockNumber) public view returns(uint256) {
if ((totalSupplyHistory.length == 0) || (totalSupplyHistory[0].fromBlock > _blockNumber)) {
return 0;
// This will return the expected totalSupply during normal situations
} else {
return getValueAt(totalSupplyHistory, _blockNumber);
}
}
/// @notice Generates `_amount` reputation that are assigned to `_owner`
/// @param _user The address that will be assigned the new reputation
/// @param _amount The quantity of reputation generated
/// @return True if the reputation are generated correctly
function mint(address _user, uint256 _amount) public onlyOwner returns (bool) {
uint256 curTotalSupply = totalSupply();
require(curTotalSupply + _amount >= curTotalSupply); // Check for overflow
uint256 previousBalanceTo = balanceOf(_user);
require(previousBalanceTo + _amount >= previousBalanceTo); // Check for overflow
updateValueAtNow(totalSupplyHistory, curTotalSupply + _amount);
updateValueAtNow(balances[_user], previousBalanceTo + _amount);
emit Mint(_user, _amount);
return true;
}
/// @notice Burns `_amount` reputation from `_owner`
/// @param _user The address that will lose the reputation
/// @param _amount The quantity of reputation to burn
/// @return True if the reputation are burned correctly
function burn(address _user, uint256 _amount) public onlyOwner returns (bool) {
uint256 curTotalSupply = totalSupply();
uint256 amountBurned = _amount;
uint256 previousBalanceFrom = balanceOf(_user);
if (previousBalanceFrom < amountBurned) {
amountBurned = previousBalanceFrom;
}
updateValueAtNow(totalSupplyHistory, curTotalSupply - amountBurned);
updateValueAtNow(balances[_user], previousBalanceFrom - amountBurned);
emit Burn(_user, amountBurned);
return true;
}
////////////////
// Internal helper functions to query and set a value in a snapshot array
////////////////
/// @dev `getValueAt` retrieves the number of reputation at a given block number
/// @param checkpoints The history of values being queried
/// @param _block The block number to retrieve the value at
/// @return The number of reputation being queried
function getValueAt(Checkpoint[] storage checkpoints, uint256 _block) internal view returns (uint256) {
if (checkpoints.length == 0) {
return 0;
}
// Shortcut for the actual value
if (_block >= checkpoints[checkpoints.length-1].fromBlock) {
return checkpoints[checkpoints.length-1].value;
}
if (_block < checkpoints[0].fromBlock) {
return 0;
}
// Binary search of the value in the array
uint256 min = 0;
uint256 max = checkpoints.length-1;
while (max > min) {
uint256 mid = (max + min + 1) / 2;
if (checkpoints[mid].fromBlock<=_block) {
min = mid;
} else {
max = mid-1;
}
}
return checkpoints[min].value;
}
/// @dev `updateValueAtNow` used to update the `balances` map and the
/// `totalSupplyHistory`
/// @param checkpoints The history of data being updated
/// @param _value The new number of reputation
function updateValueAtNow(Checkpoint[] storage checkpoints, uint256 _value) internal {
require(uint128(_value) == _value); //check value is in the 128 bits bounderies
if ((checkpoints.length == 0) || (checkpoints[checkpoints.length - 1].fromBlock < block.number)) {
Checkpoint storage newCheckPoint = checkpoints[checkpoints.length++];
newCheckPoint.fromBlock = uint128(block.number);
newCheckPoint.value = uint128(_value);
} else {
Checkpoint storage oldCheckPoint = checkpoints[checkpoints.length-1];
oldCheckPoint.value = uint128(_value);
}
}
}
// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.5.0;
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
interface IERC20 {
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);
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
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/ERC20.sol
pragma solidity ^0.5.0;
/**
* @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
*
* This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for
* all accounts just by listening to said events. Note that this isn't required by the specification, and other
* compliant implementations may not do it.
*/
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.
* Note that while this function emits an Approval event, this is not required as per the specification,
* and other compliant implementations may not emit the event.
* @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) {
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
_transfer(from, to, value);
emit Approval(from, msg.sender, _allowed[from][msg.sender]);
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
* Emits an Approval event.
* @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
* Emits an Approval event.
* @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(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 != address(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 != address(0));
_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.
* Emits an Approval event (reflecting the reduced allowance).
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
function _burnFrom(address account, uint256 value) internal {
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
_burn(account, value);
emit Approval(account, msg.sender, _allowed[account][msg.sender]);
}
}
// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Burnable.sol
pragma solidity ^0.5.0;
/**
* @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: @daostack/arc/contracts/controller/DAOToken.sol
pragma solidity ^0.5.4;
/**
* @title DAOToken, base on zeppelin contract.
* @dev ERC20 compatible token. It is a mintable, burnable token.
*/
contract DAOToken is ERC20, ERC20Burnable, Ownable {
string public name;
string public symbol;
// solhint-disable-next-line const-name-snakecase
uint8 public constant decimals = 18;
uint256 public cap;
/**
* @dev Constructor
* @param _name - token name
* @param _symbol - token symbol
* @param _cap - token cap - 0 value means no cap
*/
constructor(string memory _name, string memory _symbol, uint256 _cap)
public {
name = _name;
symbol = _symbol;
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.
*/
function mint(address _to, uint256 _amount) public onlyOwner returns (bool) {
if (cap > 0)
require(totalSupply().add(_amount) <= cap);
_mint(_to, _amount);
return true;
}
}
// File: openzeppelin-solidity/contracts/utils/Address.sol
pragma solidity ^0.5.0;
/**
* 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.
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
}
// File: @daostack/arc/contracts/libs/SafeERC20.sol
/*
SafeERC20 by daostack.
The code is based on a fix by SECBIT Team.
USE WITH CAUTION & NO WARRANTY
REFERENCE & RELATED READING
- https://github.com/ethereum/solidity/issues/4116
- https://medium.com/@chris_77367/explaining-unexpected-reverts-starting-with-solidity-0-4-22-3ada6e82308c
- https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca
- https://gist.github.com/BrendanChou/88a2eeb80947ff00bcf58ffdafeaeb61
*/
pragma solidity ^0.5.4;
library SafeERC20 {
using Address for address;
bytes4 constant private TRANSFER_SELECTOR = bytes4(keccak256(bytes("transfer(address,uint256)")));
bytes4 constant private TRANSFERFROM_SELECTOR = bytes4(keccak256(bytes("transferFrom(address,address,uint256)")));
bytes4 constant private APPROVE_SELECTOR = bytes4(keccak256(bytes("approve(address,uint256)")));
function safeTransfer(address _erc20Addr, address _to, uint256 _value) internal {
// Must be a contract addr first!
require(_erc20Addr.isContract());
(bool success, bytes memory returnValue) =
// solhint-disable-next-line avoid-low-level-calls
_erc20Addr.call(abi.encodeWithSelector(TRANSFER_SELECTOR, _to, _value));
// call return false when something wrong
require(success);
//check return value
require(returnValue.length == 0 || (returnValue.length == 32 && (returnValue[31] != 0)));
}
function safeTransferFrom(address _erc20Addr, address _from, address _to, uint256 _value) internal {
// Must be a contract addr first!
require(_erc20Addr.isContract());
(bool success, bytes memory returnValue) =
// solhint-disable-next-line avoid-low-level-calls
_erc20Addr.call(abi.encodeWithSelector(TRANSFERFROM_SELECTOR, _from, _to, _value));
// call return false when something wrong
require(success);
//check return value
require(returnValue.length == 0 || (returnValue.length == 32 && (returnValue[31] != 0)));
}
function safeApprove(address _erc20Addr, address _spender, uint256 _value) internal {
// Must be a contract addr first!
require(_erc20Addr.isContract());
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero.
require((_value == 0) || (IERC20(_erc20Addr).allowance(address(this), _spender) == 0));
(bool success, bytes memory returnValue) =
// solhint-disable-next-line avoid-low-level-calls
_erc20Addr.call(abi.encodeWithSelector(APPROVE_SELECTOR, _spender, _value));
// call return false when something wrong
require(success);
//check return value
require(returnValue.length == 0 || (returnValue.length == 32 && (returnValue[31] != 0)));
}
}
// File: @daostack/arc/contracts/controller/Avatar.sol
pragma solidity ^0.5.4;
/**
* @title An Avatar holds tokens, reputation and ether for a controller
*/
contract Avatar is Ownable {
using SafeERC20 for address;
string public orgName;
DAOToken public nativeToken;
Reputation public nativeReputation;
event GenericCall(address indexed _contract, bytes _data, uint _value, bool _success);
event SendEther(uint256 _amountInWei, address indexed _to);
event ExternalTokenTransfer(address indexed _externalToken, address indexed _to, uint256 _value);
event ExternalTokenTransferFrom(address indexed _externalToken, address _from, address _to, uint256 _value);
event ExternalTokenApproval(address indexed _externalToken, address _spender, uint256 _value);
event ReceiveEther(address indexed _sender, uint256 _value);
event MetaData(string _metaData);
/**
* @dev the constructor takes organization name, native token and reputation system
and creates an avatar for a controller
*/
constructor(string memory _orgName, DAOToken _nativeToken, Reputation _nativeReputation) public {
orgName = _orgName;
nativeToken = _nativeToken;
nativeReputation = _nativeReputation;
}
/**
* @dev enables an avatar to receive ethers
*/
function() external payable {
emit ReceiveEther(msg.sender, msg.value);
}
/**
* @dev perform a generic call to an arbitrary contract
* @param _contract the contract's address to call
* @param _data ABI-encoded contract call to call `_contract` address.
* @param _value value (ETH) to transfer with the transaction
* @return bool success or fail
* bytes - the return bytes of the called contract's function.
*/
function genericCall(address _contract, bytes memory _data, uint256 _value)
public
onlyOwner
returns(bool success, bytes memory returnValue) {
// solhint-disable-next-line avoid-call-value
(success, returnValue) = _contract.call.value(_value)(_data);
emit GenericCall(_contract, _data, _value, success);
}
/**
* @dev send ethers from the avatar's wallet
* @param _amountInWei amount to send in Wei units
* @param _to send the ethers to this address
* @return bool which represents success
*/
function sendEther(uint256 _amountInWei, address payable _to) public onlyOwner returns(bool) {
_to.transfer(_amountInWei);
emit SendEther(_amountInWei, _to);
return true;
}
/**
* @dev external token transfer
* @param _externalToken the token contract
* @param _to the destination address
* @param _value the amount of tokens to transfer
* @return bool which represents success
*/
function externalTokenTransfer(IERC20 _externalToken, address _to, uint256 _value)
public onlyOwner returns(bool)
{
address(_externalToken).safeTransfer(_to, _value);
emit ExternalTokenTransfer(address(_externalToken), _to, _value);
return true;
}
/**
* @dev external token transfer from a specific account
* @param _externalToken the token contract
* @param _from the account to spend token from
* @param _to the destination address
* @param _value the amount of tokens to transfer
* @return bool which represents success
*/
function externalTokenTransferFrom(
IERC20 _externalToken,
address _from,
address _to,
uint256 _value
)
public onlyOwner returns(bool)
{
address(_externalToken).safeTransferFrom(_from, _to, _value);
emit ExternalTokenTransferFrom(address(_externalToken), _from, _to, _value);
return true;
}
/**
* @dev externalTokenApproval approve the spender address to spend a specified amount of tokens
* on behalf of msg.sender.
* @param _externalToken the address of the Token Contract
* @param _spender address
* @param _value the amount of ether (in Wei) which the approval is referring to.
* @return bool which represents a success
*/
function externalTokenApproval(IERC20 _externalToken, address _spender, uint256 _value)
public onlyOwner returns(bool)
{
address(_externalToken).safeApprove(_spender, _value);
emit ExternalTokenApproval(address(_externalToken), _spender, _value);
return true;
}
/**
* @dev metaData emits an event with a string, should contain the hash of some meta data.
* @param _metaData a string representing a hash of the meta data
* @return bool which represents a success
*/
function metaData(string memory _metaData) public onlyOwner returns(bool) {
emit MetaData(_metaData);
return true;
}
}
// File: @daostack/arc/contracts/globalConstraints/GlobalConstraintInterface.sol
pragma solidity ^0.5.4;
contract GlobalConstraintInterface {
enum CallPhase { Pre, Post, PreAndPost }
function pre( address _scheme, bytes32 _params, bytes32 _method ) public returns(bool);
function post( address _scheme, bytes32 _params, bytes32 _method ) public returns(bool);
/**
* @dev when return if this globalConstraints is pre, post or both.
* @return CallPhase enum indication Pre, Post or PreAndPost.
*/
function when() public returns(CallPhase);
}
// File: @daostack/arc/contracts/controller/ControllerInterface.sol
pragma solidity ^0.5.4;
/**
* @title Controller contract
* @dev A controller controls the organizations tokens ,reputation and avatar.
* It is subject to a set of schemes and constraints that determine its behavior.
* Each scheme has it own parameters and operation permissions.
*/
interface ControllerInterface {
/**
* @dev Mint `_amount` of reputation that are assigned to `_to` .
* @param _amount amount of reputation to mint
* @param _to beneficiary address
* @return bool which represents a success
*/
function mintReputation(uint256 _amount, address _to, address _avatar)
external
returns(bool);
/**
* @dev Burns `_amount` of reputation from `_from`
* @param _amount amount of reputation to burn
* @param _from The address that will lose the reputation
* @return bool which represents a success
*/
function burnReputation(uint256 _amount, address _from, address _avatar)
external
returns(bool);
/**
* @dev mint tokens .
* @param _amount amount of token to mint
* @param _beneficiary beneficiary address
* @param _avatar address
* @return bool which represents a success
*/
function mintTokens(uint256 _amount, address _beneficiary, address _avatar)
external
returns(bool);
/**
* @dev register or update a scheme
* @param _scheme the address of the scheme
* @param _paramsHash a hashed configuration of the usage of the scheme
* @param _permissions the permissions the new scheme will have
* @param _avatar address
* @return bool which represents a success
*/
function registerScheme(address _scheme, bytes32 _paramsHash, bytes4 _permissions, address _avatar)
external
returns(bool);
/**
* @dev unregister a scheme
* @param _avatar address
* @param _scheme the address of the scheme
* @return bool which represents a success
*/
function unregisterScheme(address _scheme, address _avatar)
external
returns(bool);
/**
* @dev unregister the caller's scheme
* @param _avatar address
* @return bool which represents a success
*/
function unregisterSelf(address _avatar) external returns(bool);
/**
* @dev add or update Global Constraint
* @param _globalConstraint the address of the global constraint to be added.
* @param _params the constraint parameters hash.
* @param _avatar the avatar of the organization
* @return bool which represents a success
*/
function addGlobalConstraint(address _globalConstraint, bytes32 _params, address _avatar)
external returns(bool);
/**
* @dev remove Global Constraint
* @param _globalConstraint the address of the global constraint to be remove.
* @param _avatar the organization avatar.
* @return bool which represents a success
*/
function removeGlobalConstraint (address _globalConstraint, address _avatar)
external returns(bool);
/**
* @dev upgrade the Controller
* The function will trigger an event 'UpgradeController'.
* @param _newController the address of the new controller.
* @param _avatar address
* @return bool which represents a success
*/
function upgradeController(address _newController, Avatar _avatar)
external returns(bool);
/**
* @dev perform a generic call to an arbitrary contract
* @param _contract the contract's address to call
* @param _data ABI-encoded contract call to call `_contract` address.
* @param _avatar the controller's avatar address
* @param _value value (ETH) to transfer with the transaction
* @return bool -success
* bytes - the return value of the called _contract's function.
*/
function genericCall(address _contract, bytes calldata _data, Avatar _avatar, uint256 _value)
external
returns(bool, bytes memory);
/**
* @dev send some ether
* @param _amountInWei the amount of ether (in Wei) to send
* @param _to address of the beneficiary
* @param _avatar address
* @return bool which represents a success
*/
function sendEther(uint256 _amountInWei, address payable _to, Avatar _avatar)
external returns(bool);
/**
* @dev send some amount of arbitrary ERC20 Tokens
* @param _externalToken the address of the Token Contract
* @param _to address of the beneficiary
* @param _value the amount of ether (in Wei) to send
* @param _avatar address
* @return bool which represents a success
*/
function externalTokenTransfer(IERC20 _externalToken, address _to, uint256 _value, Avatar _avatar)
external
returns(bool);
/**
* @dev transfer token "from" address "to" address
* One must to approve the amount of tokens which can be spend from the
* "from" account.This can be done using externalTokenApprove.
* @param _externalToken the address of the Token Contract
* @param _from address of the account to send from
* @param _to address of the beneficiary
* @param _value the amount of ether (in Wei) to send
* @param _avatar address
* @return bool which represents a success
*/
function externalTokenTransferFrom(
IERC20 _externalToken,
address _from,
address _to,
uint256 _value,
Avatar _avatar)
external
returns(bool);
/**
* @dev externalTokenApproval approve the spender address to spend a specified amount of tokens
* on behalf of msg.sender.
* @param _externalToken the address of the Token Contract
* @param _spender address
* @param _value the amount of ether (in Wei) which the approval is referring to.
* @return bool which represents a success
*/
function externalTokenApproval(IERC20 _externalToken, address _spender, uint256 _value, Avatar _avatar)
external
returns(bool);
/**
* @dev metaData emits an event with a string, should contain the hash of some meta data.
* @param _metaData a string representing a hash of the meta data
* @param _avatar Avatar
* @return bool which represents a success
*/
function metaData(string calldata _metaData, Avatar _avatar) external returns(bool);
/**
* @dev getNativeReputation
* @param _avatar the organization avatar.
* @return organization native reputation
*/
function getNativeReputation(address _avatar)
external
view
returns(address);
function isSchemeRegistered( address _scheme, address _avatar) external view returns(bool);
function getSchemeParameters(address _scheme, address _avatar) external view returns(bytes32);
function getGlobalConstraintParameters(address _globalConstraint, address _avatar) external view returns(bytes32);
function getSchemePermissions(address _scheme, address _avatar) external view returns(bytes4);
/**
* @dev globalConstraintsCount return the global constraint pre and post count
* @return uint256 globalConstraintsPre count.
* @return uint256 globalConstraintsPost count.
*/
function globalConstraintsCount(address _avatar) external view returns(uint, uint);
function isGlobalConstraintRegistered(address _globalConstraint, address _avatar) external view returns(bool);
}
// File: contracts/dao/schemes/SchemeGuard.sol
pragma solidity >0.5.4;
/* @dev abstract contract for ensuring that schemes have been registered properly
* Allows setting zero Avatar in situations where the Avatar hasn't been created yet
*/
contract SchemeGuard is Ownable {
Avatar avatar;
ControllerInterface internal controller = ControllerInterface(0);
/** @dev Constructor. only sets controller if given avatar is not null.
* @param _avatar The avatar of the DAO.
*/
constructor(Avatar _avatar) public {
avatar = _avatar;
if (avatar != Avatar(0)) {
controller = ControllerInterface(avatar.owner());
}
}
/** @dev modifier to check if caller is avatar
*/
modifier onlyAvatar() {
require(address(avatar) == msg.sender, "only Avatar can call this method");
_;
}
/** @dev modifier to check if scheme is registered
*/
modifier onlyRegistered() {
require(isRegistered(), "Scheme is not registered");
_;
}
/** @dev modifier to check if scheme is not registered
*/
modifier onlyNotRegistered() {
require(!isRegistered(), "Scheme is registered");
_;
}
/** @dev modifier to check if call is a scheme that is registered
*/
modifier onlyRegisteredCaller() {
require(isRegistered(msg.sender), "Calling scheme is not registered");
_;
}
/** @dev Function to set a new avatar and controller for scheme
* can only be done by owner of scheme
*/
function setAvatar(Avatar _avatar) public onlyOwner {
avatar = _avatar;
controller = ControllerInterface(avatar.owner());
}
/** @dev function to see if an avatar has been set and if this scheme is registered
* @return true if scheme is registered
*/
function isRegistered() public view returns (bool) {
return isRegistered(address(this));
}
/** @dev function to see if an avatar has been set and if this scheme is registered
* @return true if scheme is registered
*/
function isRegistered(address scheme) public view returns (bool) {
require(avatar != Avatar(0), "Avatar is not set");
if (!(controller.isSchemeRegistered(scheme, address(avatar)))) {
return false;
}
return true;
}
}
// File: contracts/identity/IdentityAdminRole.sol
pragma solidity >0.5.4;
/**
* @title Contract managing the identity admin role
*/
contract IdentityAdminRole is Ownable {
using Roles for Roles.Role;
event IdentityAdminAdded(address indexed account);
event IdentityAdminRemoved(address indexed account);
Roles.Role private IdentityAdmins;
/* @dev constructor. Adds caller as an admin
*/
constructor() internal {
_addIdentityAdmin(msg.sender);
}
/* @dev Modifier to check if caller is an admin
*/
modifier onlyIdentityAdmin() {
require(isIdentityAdmin(msg.sender), "not IdentityAdmin");
_;
}
/**
* @dev Checks if account is identity admin
* @param account Account to check
* @return Boolean indicating if account is identity admin
*/
function isIdentityAdmin(address account) public view returns (bool) {
return IdentityAdmins.has(account);
}
/**
* @dev Adds a identity admin account. Is only callable by owner.
* @param account Address to be added
* @return true if successful
*/
function addIdentityAdmin(address account) public onlyOwner returns (bool) {
_addIdentityAdmin(account);
return true;
}
/**
* @dev Removes a identity admin account. Is only callable by owner.
* @param account Address to be removed
* @return true if successful
*/
function removeIdentityAdmin(address account) public onlyOwner returns (bool) {
_removeIdentityAdmin(account);
return true;
}
/**
* @dev Allows an admin to renounce their role
*/
function renounceIdentityAdmin() public {
_removeIdentityAdmin(msg.sender);
}
/**
* @dev Internal implementation of addIdentityAdmin
*/
function _addIdentityAdmin(address account) internal {
IdentityAdmins.add(account);
emit IdentityAdminAdded(account);
}
/**
* @dev Internal implementation of removeIdentityAdmin
*/
function _removeIdentityAdmin(address account) internal {
IdentityAdmins.remove(account);
emit IdentityAdminRemoved(account);
}
}
// File: contracts/identity/Identity.sol
pragma solidity >0.5.4;
/* @title Identity contract responsible for whitelisting
* and keeping track of amount of whitelisted users
*/
contract Identity is IdentityAdminRole, SchemeGuard, Pausable {
using Roles for Roles.Role;
using SafeMath for uint256;
Roles.Role private blacklist;
Roles.Role private whitelist;
Roles.Role private contracts;
uint256 public whitelistedCount = 0;
uint256 public whitelistedContracts = 0;
uint256 public authenticationPeriod = 14;
mapping(address => uint256) public dateAuthenticated;
mapping(address => uint256) public dateAdded;
mapping(address => string) public addrToDID;
mapping(bytes32 => address) public didHashToAddress;
event BlacklistAdded(address indexed account);
event BlacklistRemoved(address indexed account);
event WhitelistedAdded(address indexed account);
event WhitelistedRemoved(address indexed account);
event ContractAdded(address indexed account);
event ContractRemoved(address indexed account);
constructor() public SchemeGuard(Avatar(0)) {}
/* @dev Sets a new value for authenticationPeriod.
* Can only be called by Identity Administrators.
* @param period new value for authenticationPeriod
*/
function setAuthenticationPeriod(uint256 period) public onlyOwner whenNotPaused {
authenticationPeriod = period;
}
/* @dev Sets the authentication date of `account`
* to the current time.
* Can only be called by Identity Administrators.
* @param account address to change its auth date
*/
function authenticate(address account)
public
onlyRegistered
onlyIdentityAdmin
whenNotPaused
{
dateAuthenticated[account] = now;
}
/* @dev Adds an address as whitelisted.
* Can only be called by Identity Administrators.
* @param account address to add as whitelisted
*/
function addWhitelisted(address account)
public
onlyRegistered
onlyIdentityAdmin
whenNotPaused
{
_addWhitelisted(account);
}
/* @dev Adds an address as whitelisted under a specific ID
* @param account The address to add
* @param did the ID to add account under
*/
function addWhitelistedWithDID(address account, string memory did)
public
onlyRegistered
onlyIdentityAdmin
whenNotPaused
{
_addWhitelistedWithDID(account, did);
}
/* @dev Removes an address as whitelisted.
* Can only be called by Identity Administrators.
* @param account address to remove as whitelisted
*/
function removeWhitelisted(address account)
public
onlyRegistered
onlyIdentityAdmin
whenNotPaused
{
_removeWhitelisted(account);
}
/* @dev Renounces message sender from whitelisted
*/
function renounceWhitelisted() public whenNotPaused {
_removeWhitelisted(msg.sender);
}
/* @dev Returns true if given address has been added to whitelist
* @param account the address to check
* @return a bool indicating weather the address is present in whitelist
*/
function isWhitelisted(address account) public view returns (bool) {
uint256 daysSinceAuthentication = (now.sub(dateAuthenticated[account])) / 1 days;
return
(daysSinceAuthentication <= authenticationPeriod) && whitelist.has(account);
}
/* @dev Function that gives the date the given user was added
* @param account The address to check
* @return The date the address was added
*/
function lastAuthenticated(address account) public view returns (uint256) {
return dateAuthenticated[account];
}
// /**
// *
// * @dev Function to transfer whitelisted privilege to another address
// * relocates did of sender to give address
// * @param account The address to transfer to
// */
// function transferAccount(address account) public whenNotPaused {
// ERC20 token = avatar.nativeToken();
// require(!isBlacklisted(account), "Cannot transfer to blacklisted");
// require(token.balanceOf(account) == 0, "Account is already in use");
// require(isWhitelisted(msg.sender), "Requester need to be whitelisted");
// require(
// keccak256(bytes(addrToDID[account])) == keccak256(bytes("")),
// "address already has DID"
// );
// string memory did = addrToDID[msg.sender];
// bytes32 pHash = keccak256(bytes(did));
// uint256 balance = token.balanceOf(msg.sender);
// token.transferFrom(msg.sender, account, balance);
// _removeWhitelisted(msg.sender);
// _addWhitelisted(account);
// addrToDID[account] = did;
// didHashToAddress[pHash] = account;
// }
/* @dev Adds an address to blacklist.
* Can only be called by Identity Administrators.
* @param account address to add as blacklisted
*/
function addBlacklisted(address account)
public
onlyRegistered
onlyIdentityAdmin
whenNotPaused
{
blacklist.add(account);
emit BlacklistAdded(account);
}
/* @dev Removes an address from blacklist
* Can only be called by Identity Administrators.
* @param account address to remove as blacklisted
*/
function removeBlacklisted(address account)
public
onlyRegistered
onlyIdentityAdmin
whenNotPaused
{
blacklist.remove(account);
emit BlacklistRemoved(account);
}
/* @dev Function to add a Contract to list of contracts
* @param account The address to add
*/
function addContract(address account)
public
onlyRegistered
onlyIdentityAdmin
whenNotPaused
{
require(isContract(account), "Given address is not a contract");
contracts.add(account);
_addWhitelisted(account);
emit ContractAdded(account);
}
/* @dev Function to remove a Contract from list of contracts
* @param account The address to add
*/
function removeContract(address account)
public
onlyRegistered
onlyIdentityAdmin
whenNotPaused
{
contracts.remove(account);
_removeWhitelisted(account);
emit ContractRemoved(account);
}
/* @dev Function to check if given contract is on list of contracts.
* @param address to check
* @return a bool indicating if address is on list of contracts
*/
function isDAOContract(address account) public view returns (bool) {
return contracts.has(account);
}
/* @dev Internal function to add to whitelisted
* @param account the address to add
*/
function _addWhitelisted(address account) internal {
whitelist.add(account);
whitelistedCount += 1;
dateAdded[account] = now;
dateAuthenticated[account] = now;
if (isContract(account)) {
whitelistedContracts += 1;
}
emit WhitelistedAdded(account);
}
/* @dev Internal whitelisting with did function.
* @param account the address to add
* @param did the id to register account under
*/
function _addWhitelistedWithDID(address account, string memory did) internal {
bytes32 pHash = keccak256(bytes(did));
require(didHashToAddress[pHash] == address(0), "DID already registered");
addrToDID[account] = did;
didHashToAddress[pHash] = account;
_addWhitelisted(account);
}
/* @dev Internal function to remove from whitelisted
* @param account the address to add
*/
function _removeWhitelisted(address account) internal {
whitelist.remove(account);
whitelistedCount -= 1;
delete dateAuthenticated[account];
if (isContract(account)) {
whitelistedContracts -= 1;
}
string memory did = addrToDID[account];
bytes32 pHash = keccak256(bytes(did));
delete dateAuthenticated[account];
delete addrToDID[account];
delete didHashToAddress[pHash];
emit WhitelistedRemoved(account);
}
/* @dev Returns true if given address has been added to the blacklist
* @param account the address to check
* @return a bool indicating weather the address is present in the blacklist
*/
function isBlacklisted(address account) public view returns (bool) {
return blacklist.has(account);
}
/* @dev Function to see if given address is a contract
* @return true if address is a contract
*/
function isContract(address _addr) internal view returns (bool) {
uint256 length;
assembly {
length := extcodesize(_addr)
}
return length > 0;
}
}
// File: contracts/identity/IdentityGuard.sol
pragma solidity >0.5.4;
/* @title The IdentityGuard contract
* @dev Contract containing an identity and
* modifiers to ensure proper access
*/
contract IdentityGuard is Ownable {
Identity public identity;
/* @dev Constructor. Checks if identity is a zero address
* @param _identity The identity contract.
*/
constructor(Identity _identity) public {
require(_identity != Identity(0), "Supplied identity is null");
identity = _identity;
}
/* @dev Modifier that requires the sender to be not blacklisted
*/
modifier onlyNotBlacklisted() {
require(!identity.isBlacklisted(msg.sender), "Caller is blacklisted");
_;
}
/* @dev Modifier that requires the given address to be not blacklisted
* @param _account The address to be checked
*/
modifier requireNotBlacklisted(address _account) {
require(!identity.isBlacklisted(_account), "Receiver is blacklisted");
_;
}
/* @dev Modifier that requires the sender to be whitelisted
*/
modifier onlyWhitelisted() {
require(identity.isWhitelisted(msg.sender), "is not whitelisted");
_;
}
/* @dev Modifier that requires the given address to be whitelisted
* @param _account the given address
*/
modifier requireWhitelisted(address _account) {
require(identity.isWhitelisted(_account), "is not whitelisted");
_;
}
/* @dev Modifier that requires the sender to be an approved DAO contract
*/
modifier onlyDAOContract() {
require(identity.isDAOContract(msg.sender), "is not whitelisted contract");
_;
}
/* @dev Modifier that requires the given address to be whitelisted
* @param _account the given address
*/
modifier requireDAOContract(address _contract) {
require(identity.isDAOContract(_contract), "is not whitelisted contract");
_;
}
/* @dev Modifier that requires the sender to have been whitelisted
* before or on the given date
* @param date The time sender must have been added before
*/
modifier onlyAddedBefore(uint256 date) {
require(
identity.lastAuthenticated(msg.sender) <= date,
"Was not added within period"
);
_;
}
/* @dev Modifier that requires sender to be an identity admin
*/
modifier onlyIdentityAdmin() {
require(identity.isIdentityAdmin(msg.sender), "not IdentityAdmin");
_;
}
/* @dev Allows owner to set a new identity contract if
* the given identity contract has been registered as a scheme
*/
function setIdentity(Identity _identity) public onlyOwner {
require(_identity.isRegistered(), "Identity is not registered");
identity = _identity;
}
}
// File: contracts/dao/schemes/FeeFormula.sol
pragma solidity >0.5.4;
/**
* @title Fee formula abstract contract
*/
contract AbstractFees is SchemeGuard {
constructor() public SchemeGuard(Avatar(0)) {}
function getTxFees(
uint256 _value,
address _sender,
address _recipient
) public view returns (uint256, bool);
}
/**
* @title Fee formula contract
* contract that provides a function to calculate
* fees as a percentage of any given value
*/
contract FeeFormula is AbstractFees {
using SafeMath for uint256;
uint256 public percentage;
bool public constant senderPays = false;
/**
* @dev Constructor. Requires the given percentage parameter
* to be less than 100.
* @param _percentage the percentage to calculate fees of
*/
constructor(uint256 _percentage) public {
require(_percentage < 100, "Percentage should be <100");
percentage = _percentage;
}
/** @dev calculates the fee of given value.
* @param _value the value of the transaction to calculate fees from
* @param _sender address sending.
* @param _recipient address receiving.
* @return the transactional fee for given value
*/
function getTxFees(
uint256 _value,
address _sender,
address _recipient
) public view returns (uint256, bool) {
return (_value.mul(percentage).div(100), senderPays);
}
}
// File: contracts/dao/schemes/FormulaHolder.sol
pragma solidity >0.5.4;
/* @title Contract in charge of setting registered fee formula schemes to contract
*/
contract FormulaHolder is Ownable {
AbstractFees public formula;
/* @dev Constructor. Requires that given formula is a valid contract.
* @param _formula The fee formula contract.
*/
constructor(AbstractFees _formula) public {
require(_formula != AbstractFees(0), "Supplied formula is null");
formula = _formula;
}
/* @dev Sets the given fee formula contract. Is only callable by owner.
* Reverts if formula has not been registered by DAO.
* @param _formula the new fee formula scheme
*/
function setFormula(AbstractFees _formula) public onlyOwner {
_formula.isRegistered();
formula = _formula;
}
}
// File: contracts/token/ERC677/ERC677.sol
pragma solidity >0.5.4;
/* @title ERC677 interface
*/
interface ERC677 {
event Transfer(address indexed from, address indexed to, uint256 value, bytes data);
function transferAndCall(
address,
uint256,
bytes calldata
) external returns (bool);
}
// File: contracts/token/ERC677/ERC677Receiver.sol
pragma solidity >0.5.4;
/* @title ERC677Receiver interface
*/
interface ERC677Receiver {
function onTokenTransfer(
address _from,
uint256 _value,
bytes calldata _data
) external returns (bool);
}
// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Pausable.sol
pragma solidity ^0.5.0;
/**
* @title Pausable token
* @dev ERC20 modified with pausable transfers.
**/
contract ERC20Pausable is ERC20, Pausable {
function transfer(address to, uint256 value) public whenNotPaused returns (bool) {
return super.transfer(to, value);
}
function transferFrom(address from, address to, uint256 value) public whenNotPaused returns (bool) {
return super.transferFrom(from, to, value);
}
function approve(address spender, uint256 value) public whenNotPaused returns (bool) {
return super.approve(spender, value);
}
function increaseAllowance(address spender, uint addedValue) public whenNotPaused returns (bool success) {
return super.increaseAllowance(spender, addedValue);
}
function decreaseAllowance(address spender, uint subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseAllowance(spender, subtractedValue);
}
}
// File: contracts/token/ERC677Token.sol
pragma solidity >0.5.4;
/* @title ERC677Token contract.
*/
contract ERC677Token is ERC677, DAOToken, ERC20Pausable {
constructor(
string memory _name,
string memory _symbol,
uint256 _cap
) public DAOToken(_name, _symbol, _cap) {}
/**
* @dev transfer token to a contract address with additional data if the recipient is a contact.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @param _data The extra data to be passed to the receiving contract.
* @return true if transfer is successful
*/
function _transferAndCall(
address _to,
uint256 _value,
bytes memory _data
) internal whenNotPaused returns (bool) {
bool res = super.transfer(_to, _value);
emit Transfer(msg.sender, _to, _value, _data);
if (isContract(_to)) {
require(contractFallback(_to, _value, _data), "Contract fallback failed");
}
return res;
}
/* @dev Contract fallback function. Is called if transferAndCall is called
* to a contract
*/
function contractFallback(
address _to,
uint256 _value,
bytes memory _data
) private returns (bool) {
ERC677Receiver receiver = ERC677Receiver(_to);
require(
receiver.onTokenTransfer(msg.sender, _value, _data),
"Contract Fallback failed"
);
return true;
}
/* @dev Function to check if given address is a contract
* @param _addr Address to check
* @return true if given address is a contract
*/
function isContract(address _addr) internal view returns (bool) {
uint256 length;
assembly {
length := extcodesize(_addr)
}
return length > 0;
}
}
// File: openzeppelin-solidity/contracts/access/roles/MinterRole.sol
pragma solidity ^0.5.0;
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: contracts/token/ERC677BridgeToken.sol
pragma solidity >0.5.4;
contract ERC677BridgeToken is ERC677Token, MinterRole {
address public bridgeContract;
constructor(
string memory _name,
string memory _symbol,
uint256 _cap
) public ERC677Token(_name, _symbol, _cap) {}
function setBridgeContract(address _bridgeContract) public onlyMinter {
require(
_bridgeContract != address(0) && isContract(_bridgeContract),
"Invalid bridge contract"
);
bridgeContract = _bridgeContract;
}
}
// File: contracts/token/GoodDollar.sol
pragma solidity >0.5.4;
/**
* @title The GoodDollar ERC677 token contract
*/
contract GoodDollar is ERC677BridgeToken, IdentityGuard, FormulaHolder {
address feeRecipient;
// Overrides hard-coded decimal in DAOToken
uint256 public constant decimals = 2;
/**
* @dev constructor
* @param _name The name of the token
* @param _symbol The symbol of the token
* @param _cap the cap of the token. no cap if 0
* @param _formula the fee formula contract
* @param _identity the identity contract
* @param _feeRecipient the address that receives transaction fees
*/
constructor(
string memory _name,
string memory _symbol,
uint256 _cap,
AbstractFees _formula,
Identity _identity,
address _feeRecipient
)
public
ERC677BridgeToken(_name, _symbol, _cap)
IdentityGuard(_identity)
FormulaHolder(_formula)
{
feeRecipient = _feeRecipient;
}
/**
* @dev Processes fees from given value and sends
* remainder to given address
* @param to the address to be sent to
* @param value the value to be processed and then
* transferred
* @return a boolean that indicates if the operation was successful
*/
function transfer(address to, uint256 value) public returns (bool) {
uint256 bruttoValue = processFees(msg.sender, to, value);
return super.transfer(to, bruttoValue);
}
/**
* @dev Approve the passed address to spend the specified
* amount of tokens on behalf of msg.sender
* @param spender The address which will spend the funds
* @param value The amount of tokens to be spent
* @return a boolean that indicates if the operation was successful
*/
function approve(address spender, uint256 value) public returns (bool) {
return super.approve(spender, 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 returns (bool) {
uint256 bruttoValue = processFees(from, to, value);
return super.transferFrom(from, to, bruttoValue);
}
/**
* @dev Processes transfer fees and calls ERC677Token transferAndCall function
* @param to address to transfer to
* @param value the amount to transfer
* @param data The data to pass to transferAndCall
* @return a bool indicating if transfer function succeeded
*/
function transferAndCall(
address to,
uint256 value,
bytes calldata data
) external returns (bool) {
uint256 bruttoValue = processFees(msg.sender, to, value);
return super._transferAndCall(to, bruttoValue, data);
}
/**
* @dev Minting function
* @param to the address that will receive the minted tokens
* @param value the amount of tokens to mint
* @return a boolean that indicated if the operation was successful
*/
function mint(address to, uint256 value)
public
onlyMinter
requireNotBlacklisted(to)
returns (bool)
{
if (cap > 0) {
require(totalSupply().add(value) <= cap, "Cannot increase supply beyond cap");
}
super._mint(to, value);
return true;
}
/**
* @dev Burns a specific amount of tokens.
* @param value The amount of token to be burned.
*/
function burn(uint256 value) public onlyNotBlacklisted {
super.burn(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
onlyNotBlacklisted
requireNotBlacklisted(from)
{
super.burnFrom(from, value);
}
/**
* @dev Increase the amount of tokens that an owner allows a spender
* @param spender The address which will spend the funds
* @param addedValue The amount of tokens to increase the allowance by
* @return a boolean that indicated if the operation was successful
*/
function increaseAllowance(address spender, uint256 addedValue)
public
returns (bool)
{
return super.increaseAllowance(spender, addedValue);
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender
* @param spender The address which will spend the funds
* @param subtractedValue The amount of tokens to decrease the allowance by
* @return a boolean that indicated if the operation was successful
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
returns (bool)
{
return super.decreaseAllowance(spender, subtractedValue);
}
/**
* @dev Gets the current transaction fees
* @return an uint256 that represents
* the current transaction fees
*/
function getFees(uint256 value) public view returns (uint256, bool) {
return formula.getTxFees(value, address(0), address(0));
}
/**
* @dev Gets the current transaction fees
* @return an uint256 that represents
* the current transaction fees
*/
function getFees(
uint256 value,
address sender,
address recipient
) public view returns (uint256, bool) {
return formula.getTxFees(value, sender, recipient);
}
/**
* @dev Sets the address that receives the transactional fees.
* can only be called by owner
* @param _feeRecipient The new address to receive transactional fees
*/
function setFeeRecipient(address _feeRecipient) public onlyOwner {
feeRecipient = _feeRecipient;
}
/**
* @dev Sends transactional fees to feeRecipient address from given address
* @param account The account that sends the fees
* @param value The amount to subtract fees from
* @return an uint256 that represents the given value minus the transactional fees
*/
function processFees(
address account,
address recipient,
uint256 value
) internal returns (uint256) {
(uint256 txFees, bool senderPays) = getFees(value, account, recipient);
if (txFees > 0 && !identity.isDAOContract(msg.sender)) {
require(
senderPays == false || value.add(txFees) <= balanceOf(account),
"Not enough balance to pay TX fee"
);
if (account == msg.sender) {
super.transfer(feeRecipient, txFees);
} else {
super.transferFrom(account, feeRecipient, txFees);
}
return senderPays ? value : value.sub(txFees);
}
return value;
}
}