/**
* Source Code first verified at https://etherscan.io on Friday, May 3, 2019
(UTC) */
// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.5.2;
/**
* @title ERC20 interface
* @dev see https://eips.ethereum.org/EIPS/eip-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/math/SafeMath.sol
pragma solidity ^0.5.2;
/**
* @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/token/ERC20/ERC20.sol
pragma solidity ^0.5.2;
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://eips.ethereum.org/EIPS/eip-20
* 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 A 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 to 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) {
_approve(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) {
_transfer(from, to, value);
_approve(from, msg.sender, _allowed[from][msg.sender].sub(value));
return true;
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
* approve should be called when _allowed[msg.sender][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) {
_approve(msg.sender, spender, _allowed[msg.sender][spender].add(addedValue));
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
* approve should be called when _allowed[msg.sender][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) {
_approve(msg.sender, spender, _allowed[msg.sender][spender].sub(subtractedValue));
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 Approve an address to spend another addresses' tokens.
* @param owner The address that owns the tokens.
* @param spender The address that will spend the tokens.
* @param value The number of tokens that can be spent.
*/
function _approve(address owner, address spender, uint256 value) internal {
require(spender != address(0));
require(owner != address(0));
_allowed[owner][spender] = value;
emit Approval(owner, spender, 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 {
_burn(account, value);
_approve(account, msg.sender, _allowed[account][msg.sender].sub(value));
}
}
// File: openzeppelin-solidity/contracts/ownership/Ownable.sol
pragma solidity ^0.5.2;
/**
* @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.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
* @notice Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
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: @gnosis.pm/mock-contract/contracts/MockContract.sol
pragma solidity ^0.5.0;
interface MockInterface {
/**
* @dev After calling this method, the mock will return `response` when it is called
* with any calldata that is not mocked more specifically below
* (e.g. using givenMethodReturn).
* @param response ABI encoded response that will be returned if method is invoked
*/
function givenAnyReturn(bytes calldata response) external;
function givenAnyReturnBool(bool response) external;
function givenAnyReturnUint(uint response) external;
function givenAnyReturnAddress(address response) external;
function givenAnyRevert() external;
function givenAnyRevertWithMessage(string calldata message) external;
function givenAnyRunOutOfGas() external;
/**
* @dev After calling this method, the mock will return `response` when the given
* methodId is called regardless of arguments. If the methodId and arguments
* are mocked more specifically (using `givenMethodAndArguments`) the latter
* will take precedence.
* @param method ABI encoded methodId. It is valid to pass full calldata (including arguments). The mock will extract the methodId from it
* @param response ABI encoded response that will be returned if method is invoked
*/
function givenMethodReturn(bytes calldata method, bytes calldata response) external;
function givenMethodReturnBool(bytes calldata method, bool response) external;
function givenMethodReturnUint(bytes calldata method, uint response) external;
function givenMethodReturnAddress(bytes calldata method, address response) external;
function givenMethodRevert(bytes calldata method) external;
function givenMethodRevertWithMessage(bytes calldata method, string calldata message) external;
function givenMethodRunOutOfGas(bytes calldata method) external;
/**
* @dev After calling this method, the mock will return `response` when the given
* methodId is called with matching arguments. These exact calldataMocks will take
* precedence over all other calldataMocks.
* @param call ABI encoded calldata (methodId and arguments)
* @param response ABI encoded response that will be returned if contract is invoked with calldata
*/
function givenCalldataReturn(bytes calldata call, bytes calldata response) external;
function givenCalldataReturnBool(bytes calldata call, bool response) external;
function givenCalldataReturnUint(bytes calldata call, uint response) external;
function givenCalldataReturnAddress(bytes calldata call, address response) external;
function givenCalldataRevert(bytes calldata call) external;
function givenCalldataRevertWithMessage(bytes calldata call, string calldata message) external;
function givenCalldataRunOutOfGas(bytes calldata call) external;
/**
* @dev Returns the number of times anything has been called on this mock since last reset
*/
function invocationCount() external returns (uint);
/**
* @dev Returns the number of times the given method has been called on this mock since last reset
* @param method ABI encoded methodId. It is valid to pass full calldata (including arguments). The mock will extract the methodId from it
*/
function invocationCountForMethod(bytes calldata method) external returns (uint);
/**
* @dev Returns the number of times this mock has been called with the exact calldata since last reset.
* @param call ABI encoded calldata (methodId and arguments)
*/
function invocationCountForCalldata(bytes calldata call) external returns (uint);
/**
* @dev Resets all mocked methods and invocation counts.
*/
function reset() external;
}
/**
* Implementation of the MockInterface.
*/
contract MockContract is MockInterface {
enum MockType { Return, Revert, OutOfGas }
bytes32 public constant MOCKS_LIST_START = hex"01";
bytes public constant MOCKS_LIST_END = "0xff";
bytes32 public constant MOCKS_LIST_END_HASH = keccak256(MOCKS_LIST_END);
bytes4 public constant SENTINEL_ANY_MOCKS = hex"01";
// A linked list allows easy iteration and inclusion checks
mapping(bytes32 => bytes) calldataMocks;
mapping(bytes => MockType) calldataMockTypes;
mapping(bytes => bytes) calldataExpectations;
mapping(bytes => string) calldataRevertMessage;
mapping(bytes32 => uint) calldataInvocations;
mapping(bytes4 => bytes4) methodIdMocks;
mapping(bytes4 => MockType) methodIdMockTypes;
mapping(bytes4 => bytes) methodIdExpectations;
mapping(bytes4 => string) methodIdRevertMessages;
mapping(bytes32 => uint) methodIdInvocations;
MockType fallbackMockType;
bytes fallbackExpectation;
string fallbackRevertMessage;
uint invocations;
uint resetCount;
constructor() public {
calldataMocks[MOCKS_LIST_START] = MOCKS_LIST_END;
methodIdMocks[SENTINEL_ANY_MOCKS] = SENTINEL_ANY_MOCKS;
}
function trackCalldataMock(bytes memory call) private {
bytes32 callHash = keccak256(call);
if (calldataMocks[callHash].length == 0) {
calldataMocks[callHash] = calldataMocks[MOCKS_LIST_START];
calldataMocks[MOCKS_LIST_START] = call;
}
}
function trackMethodIdMock(bytes4 methodId) private {
if (methodIdMocks[methodId] == 0x0) {
methodIdMocks[methodId] = methodIdMocks[SENTINEL_ANY_MOCKS];
methodIdMocks[SENTINEL_ANY_MOCKS] = methodId;
}
}
function _givenAnyReturn(bytes memory response) internal {
fallbackMockType = MockType.Return;
fallbackExpectation = response;
}
function givenAnyReturn(bytes calldata response) external {
_givenAnyReturn(response);
}
function givenAnyReturnBool(bool response) external {
uint flag = response ? 1 : 0;
_givenAnyReturn(uintToBytes(flag));
}
function givenAnyReturnUint(uint response) external {
_givenAnyReturn(uintToBytes(response));
}
function givenAnyReturnAddress(address response) external {
_givenAnyReturn(uintToBytes(uint(response)));
}
function givenAnyRevert() external {
fallbackMockType = MockType.Revert;
fallbackRevertMessage = "";
}
function givenAnyRevertWithMessage(string calldata message) external {
fallbackMockType = MockType.Revert;
fallbackRevertMessage = message;
}
function givenAnyRunOutOfGas() external {
fallbackMockType = MockType.OutOfGas;
}
function _givenCalldataReturn(bytes memory call, bytes memory response) private {
calldataMockTypes[call] = MockType.Return;
calldataExpectations[call] = response;
trackCalldataMock(call);
}
function givenCalldataReturn(bytes calldata call, bytes calldata response) external {
_givenCalldataReturn(call, response);
}
function givenCalldataReturnBool(bytes calldata call, bool response) external {
uint flag = response ? 1 : 0;
_givenCalldataReturn(call, uintToBytes(flag));
}
function givenCalldataReturnUint(bytes calldata call, uint response) external {
_givenCalldataReturn(call, uintToBytes(response));
}
function givenCalldataReturnAddress(bytes calldata call, address response) external {
_givenCalldataReturn(call, uintToBytes(uint(response)));
}
function _givenMethodReturn(bytes memory call, bytes memory response) private {
bytes4 method = bytesToBytes4(call);
methodIdMockTypes[method] = MockType.Return;
methodIdExpectations[method] = response;
trackMethodIdMock(method);
}
function givenMethodReturn(bytes calldata call, bytes calldata response) external {
_givenMethodReturn(call, response);
}
function givenMethodReturnBool(bytes calldata call, bool response) external {
uint flag = response ? 1 : 0;
_givenMethodReturn(call, uintToBytes(flag));
}
function givenMethodReturnUint(bytes calldata call, uint response) external {
_givenMethodReturn(call, uintToBytes(response));
}
function givenMethodReturnAddress(bytes calldata call, address response) external {
_givenMethodReturn(call, uintToBytes(uint(response)));
}
function givenCalldataRevert(bytes calldata call) external {
calldataMockTypes[call] = MockType.Revert;
calldataRevertMessage[call] = "";
trackCalldataMock(call);
}
function givenMethodRevert(bytes calldata call) external {
bytes4 method = bytesToBytes4(call);
methodIdMockTypes[method] = MockType.Revert;
trackMethodIdMock(method);
}
function givenCalldataRevertWithMessage(bytes calldata call, string calldata message) external {
calldataMockTypes[call] = MockType.Revert;
calldataRevertMessage[call] = message;
trackCalldataMock(call);
}
function givenMethodRevertWithMessage(bytes calldata call, string calldata message) external {
bytes4 method = bytesToBytes4(call);
methodIdMockTypes[method] = MockType.Revert;
methodIdRevertMessages[method] = message;
trackMethodIdMock(method);
}
function givenCalldataRunOutOfGas(bytes calldata call) external {
calldataMockTypes[call] = MockType.OutOfGas;
trackCalldataMock(call);
}
function givenMethodRunOutOfGas(bytes calldata call) external {
bytes4 method = bytesToBytes4(call);
methodIdMockTypes[method] = MockType.OutOfGas;
trackMethodIdMock(method);
}
function invocationCount() external returns (uint) {
return invocations;
}
function invocationCountForMethod(bytes calldata call) external returns (uint) {
bytes4 method = bytesToBytes4(call);
return methodIdInvocations[keccak256(abi.encodePacked(resetCount, method))];
}
function invocationCountForCalldata(bytes calldata call) external returns (uint) {
return calldataInvocations[keccak256(abi.encodePacked(resetCount, call))];
}
function reset() external {
// Reset all exact calldataMocks
bytes memory nextMock = calldataMocks[MOCKS_LIST_START];
bytes32 mockHash = keccak256(nextMock);
// We cannot compary bytes
while(mockHash != MOCKS_LIST_END_HASH) {
// Reset all mock maps
calldataMockTypes[nextMock] = MockType.Return;
calldataExpectations[nextMock] = hex"";
calldataRevertMessage[nextMock] = "";
// Set next mock to remove
nextMock = calldataMocks[mockHash];
// Remove from linked list
calldataMocks[mockHash] = "";
// Update mock hash
mockHash = keccak256(nextMock);
}
// Clear list
calldataMocks[MOCKS_LIST_START] = MOCKS_LIST_END;
// Reset all any calldataMocks
bytes4 nextAnyMock = methodIdMocks[SENTINEL_ANY_MOCKS];
while(nextAnyMock != SENTINEL_ANY_MOCKS) {
bytes4 currentAnyMock = nextAnyMock;
methodIdMockTypes[currentAnyMock] = MockType.Return;
methodIdExpectations[currentAnyMock] = hex"";
methodIdRevertMessages[currentAnyMock] = "";
nextAnyMock = methodIdMocks[currentAnyMock];
// Remove from linked list
methodIdMocks[currentAnyMock] = 0x0;
}
// Clear list
methodIdMocks[SENTINEL_ANY_MOCKS] = SENTINEL_ANY_MOCKS;
fallbackExpectation = "";
fallbackMockType = MockType.Return;
invocations = 0;
resetCount += 1;
}
function useAllGas() private {
while(true) {
bool s;
assembly {
//expensive call to EC multiply contract
s := call(sub(gas, 2000), 6, 0, 0x0, 0xc0, 0x0, 0x60)
}
}
}
function bytesToBytes4(bytes memory b) private pure returns (bytes4) {
bytes4 out;
for (uint i = 0; i < 4; i++) {
out |= bytes4(b[i] & 0xFF) >> (i * 8);
}
return out;
}
function uintToBytes(uint256 x) private pure returns (bytes memory b) {
b = new bytes(32);
assembly { mstore(add(b, 32), x) }
}
function updateInvocationCount(bytes4 methodId, bytes memory originalMsgData) public {
require(msg.sender == address(this), "Can only be called from the contract itself");
invocations += 1;
methodIdInvocations[keccak256(abi.encodePacked(resetCount, methodId))] += 1;
calldataInvocations[keccak256(abi.encodePacked(resetCount, originalMsgData))] += 1;
}
function() payable external {
bytes4 methodId;
assembly {
methodId := calldataload(0)
}
// First, check exact matching overrides
if (calldataMockTypes[msg.data] == MockType.Revert) {
revert(calldataRevertMessage[msg.data]);
}
if (calldataMockTypes[msg.data] == MockType.OutOfGas) {
useAllGas();
}
bytes memory result = calldataExpectations[msg.data];
// Then check method Id overrides
if (result.length == 0) {
if (methodIdMockTypes[methodId] == MockType.Revert) {
revert(methodIdRevertMessages[methodId]);
}
if (methodIdMockTypes[methodId] == MockType.OutOfGas) {
useAllGas();
}
result = methodIdExpectations[methodId];
}
// Last, use the fallback override
if (result.length == 0) {
if (fallbackMockType == MockType.Revert) {
revert(fallbackRevertMessage);
}
if (fallbackMockType == MockType.OutOfGas) {
useAllGas();
}
result = fallbackExpectation;
}
// Record invocation as separate call so we don't rollback in case we are called with STATICCALL
(, bytes memory r) = address(this).call.gas(100000)(abi.encodeWithSignature("updateInvocationCount(bytes4,bytes)", methodId, msg.data));
assert(r.length == 0);
assembly {
return(add(0x20, result), mload(result))
}
}
}
// File: openzeppelin-solidity/contracts/access/Roles.sol
pragma solidity ^0.5.2;
/**
* @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
pragma solidity ^0.5.2;
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
pragma solidity ^0.5.2;
/**
* @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: contracts/interfaces/IDutchExchange.sol
pragma solidity ^0.5.0;
contract IDutchExchange {
mapping(address => mapping(address => mapping(uint => mapping(address => uint)))) public sellerBalances;
mapping(address => mapping(address => mapping(uint => mapping(address => uint)))) public buyerBalances;
mapping(address => mapping(address => mapping(uint => mapping(address => uint)))) public claimedAmounts;
mapping(address => mapping(address => uint)) public balances;
function withdraw(address tokenAddress, uint amount) public returns (uint);
function deposit(address tokenAddress, uint amount) public returns (uint);
function ethToken() public returns(address);
function frtToken() public returns(address);
function owlToken() public returns(address);
function getAuctionIndex(address token1, address token2) public view returns(uint256);
function postBuyOrder(address token1, address token2, uint256 auctionIndex, uint256 amount) public returns(uint256);
function postSellOrder(address token1, address token2, uint256 auctionIndex, uint256 tokensBought) public returns(uint256, uint256);
function getCurrentAuctionPrice(address token1, address token2, uint256 auctionIndex) public view returns(uint256, uint256);
function claimSellerFunds(address sellToken, address buyToken, address user, uint auctionIndex) public returns (uint returned, uint frtsIssued);
}
// File: @gnosis.pm/util-contracts/contracts/Proxy.sol
pragma solidity ^0.5.2;
/// @title Proxied - indicates that a contract will be proxied. Also defines storage requirements for Proxy.
/// @author Alan Lu - <[email protected]>
contract Proxied {
address public masterCopy;
}
/// @title Proxy - Generic proxy contract allows to execute all transactions applying the code of a master contract.
/// @author Stefan George - <[email protected]>
contract Proxy is Proxied {
/// @dev Constructor function sets address of master copy contract.
/// @param _masterCopy Master copy address.
constructor(address _masterCopy) public {
require(_masterCopy != address(0), "The master copy is required");
masterCopy = _masterCopy;
}
/// @dev Fallback function forwards all transactions and returns all received return data.
function() external payable {
address _masterCopy = masterCopy;
assembly {
calldatacopy(0, 0, calldatasize)
let success := delegatecall(not(0), _masterCopy, 0, calldatasize, 0, 0)
returndatacopy(0, 0, returndatasize)
switch success
case 0 {
revert(0, returndatasize)
}
default {
return(0, returndatasize)
}
}
}
}
// File: @gnosis.pm/util-contracts/contracts/Token.sol
/// Implements ERC 20 Token standard: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
pragma solidity ^0.5.2;
/// @title Abstract token contract - Functions to be implemented by token contracts
contract Token {
/*
* Events
*/
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
/*
* Public functions
*/
function transfer(address to, uint value) public returns (bool);
function transferFrom(address from, address to, uint value) public returns (bool);
function approve(address spender, uint value) public returns (bool);
function balanceOf(address owner) public view returns (uint);
function allowance(address owner, address spender) public view returns (uint);
function totalSupply() public view returns (uint);
}
// File: @gnosis.pm/util-contracts/contracts/Math.sol
pragma solidity ^0.5.2;
/// @title Math library - Allows calculation of logarithmic and exponential functions
/// @author Alan Lu - <[email protected]>
/// @author Stefan George - <[email protected]>
library GnosisMath {
/*
* Constants
*/
// This is equal to 1 in our calculations
uint public constant ONE = 0x10000000000000000;
uint public constant LN2 = 0xb17217f7d1cf79ac;
uint public constant LOG2_E = 0x171547652b82fe177;
/*
* Public functions
*/
/// @dev Returns natural exponential function value of given x
/// @param x x
/// @return e**x
function exp(int x) public pure returns (uint) {
// revert if x is > MAX_POWER, where
// MAX_POWER = int(mp.floor(mp.log(mpf(2**256 - 1) / ONE) * ONE))
require(x <= 2454971259878909886679);
// return 0 if exp(x) is tiny, using
// MIN_POWER = int(mp.floor(mp.log(mpf(1) / ONE) * ONE))
if (x < -818323753292969962227) return 0;
// Transform so that e^x -> 2^x
x = x * int(ONE) / int(LN2);
// 2^x = 2^whole(x) * 2^frac(x)
// ^^^^^^^^^^ is a bit shift
// so Taylor expand on z = frac(x)
int shift;
uint z;
if (x >= 0) {
shift = x / int(ONE);
z = uint(x % int(ONE));
} else {
shift = x / int(ONE) - 1;
z = ONE - uint(-x % int(ONE));
}
// 2^x = 1 + (ln 2) x + (ln 2)^2/2! x^2 + ...
//
// Can generate the z coefficients using mpmath and the following lines
// >>> from mpmath import mp
// >>> mp.dps = 100
// >>> ONE = 0x10000000000000000
// >>> print('\n'.join(hex(int(mp.log(2)**i / mp.factorial(i) * ONE)) for i in range(1, 7)))
// 0xb17217f7d1cf79ab
// 0x3d7f7bff058b1d50
// 0xe35846b82505fc5
// 0x276556df749cee5
// 0x5761ff9e299cc4
// 0xa184897c363c3
uint zpow = z;
uint result = ONE;
result += 0xb17217f7d1cf79ab * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x3d7f7bff058b1d50 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0xe35846b82505fc5 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x276556df749cee5 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x5761ff9e299cc4 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0xa184897c363c3 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0xffe5fe2c4586 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x162c0223a5c8 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x1b5253d395e * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x1e4cf5158b * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x1e8cac735 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x1c3bd650 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x1816193 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x131496 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0xe1b7 * zpow / ONE;
zpow = zpow * z / ONE;
result += 0x9c7 * zpow / ONE;
if (shift >= 0) {
if (result >> (256 - shift) > 0) return (2 ** 256 - 1);
return result << shift;
} else return result >> (-shift);
}
/// @dev Returns natural logarithm value of given x
/// @param x x
/// @return ln(x)
function ln(uint x) public pure returns (int) {
require(x > 0);
// binary search for floor(log2(x))
int ilog2 = floorLog2(x);
int z;
if (ilog2 < 0) z = int(x << uint(-ilog2));
else z = int(x >> uint(ilog2));
// z = x * 2^-⌊log₂x⌋
// so 1 <= z < 2
// and ln z = ln x - ⌊log₂x⌋/log₂e
// so just compute ln z using artanh series
// and calculate ln x from that
int term = (z - int(ONE)) * int(ONE) / (z + int(ONE));
int halflnz = term;
int termpow = term * term / int(ONE) * term / int(ONE);
halflnz += termpow / 3;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 5;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 7;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 9;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 11;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 13;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 15;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 17;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 19;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 21;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 23;
termpow = termpow * term / int(ONE) * term / int(ONE);
halflnz += termpow / 25;
return (ilog2 * int(ONE)) * int(ONE) / int(LOG2_E) + 2 * halflnz;
}
/// @dev Returns base 2 logarithm value of given x
/// @param x x
/// @return logarithmic value
function floorLog2(uint x) public pure returns (int lo) {
lo = -64;
int hi = 193;
// I use a shift here instead of / 2 because it floors instead of rounding towards 0
int mid = (hi + lo) >> 1;
while ((lo + 1) < hi) {
if (mid < 0 && x << uint(-mid) < ONE || mid >= 0 && x >> uint(mid) < ONE) hi = mid;
else lo = mid;
mid = (hi + lo) >> 1;
}
}
/// @dev Returns maximum of an array
/// @param nums Numbers to look through
/// @return Maximum number
function max(int[] memory nums) public pure returns (int maxNum) {
require(nums.length > 0);
maxNum = -2 ** 255;
for (uint i = 0; i < nums.length; i++) if (nums[i] > maxNum) maxNum = nums[i];
}
/// @dev Returns whether an add operation causes an overflow
/// @param a First addend
/// @param b Second addend
/// @return Did no overflow occur?
function safeToAdd(uint a, uint b) internal pure returns (bool) {
return a + b >= a;
}
/// @dev Returns whether a subtraction operation causes an underflow
/// @param a Minuend
/// @param b Subtrahend
/// @return Did no underflow occur?
function safeToSub(uint a, uint b) internal pure returns (bool) {
return a >= b;
}
/// @dev Returns whether a multiply operation causes an overflow
/// @param a First factor
/// @param b Second factor
/// @return Did no overflow occur?
function safeToMul(uint a, uint b) internal pure returns (bool) {
return b == 0 || a * b / b == a;
}
/// @dev Returns sum if no overflow occurred
/// @param a First addend
/// @param b Second addend
/// @return Sum
function add(uint a, uint b) internal pure returns (uint) {
require(safeToAdd(a, b));
return a + b;
}
/// @dev Returns difference if no overflow occurred
/// @param a Minuend
/// @param b Subtrahend
/// @return Difference
function sub(uint a, uint b) internal pure returns (uint) {
require(safeToSub(a, b));
return a - b;
}
/// @dev Returns product if no overflow occurred
/// @param a First factor
/// @param b Second factor
/// @return Product
function mul(uint a, uint b) internal pure returns (uint) {
require(safeToMul(a, b));
return a * b;
}
/// @dev Returns whether an add operation causes an overflow
/// @param a First addend
/// @param b Second addend
/// @return Did no overflow occur?
function safeToAdd(int a, int b) internal pure returns (bool) {
return (b >= 0 && a + b >= a) || (b < 0 && a + b < a);
}
/// @dev Returns whether a subtraction operation causes an underflow
/// @param a Minuend
/// @param b Subtrahend
/// @return Did no underflow occur?
function safeToSub(int a, int b) internal pure returns (bool) {
return (b >= 0 && a - b <= a) || (b < 0 && a - b > a);
}
/// @dev Returns whether a multiply operation causes an overflow
/// @param a First factor
/// @param b Second factor
/// @return Did no overflow occur?
function safeToMul(int a, int b) internal pure returns (bool) {
return (b == 0) || (a * b / b == a);
}
/// @dev Returns sum if no overflow occurred
/// @param a First addend
/// @param b Second addend
/// @return Sum
function add(int a, int b) internal pure returns (int) {
require(safeToAdd(a, b));
return a + b;
}
/// @dev Returns difference if no overflow occurred
/// @param a Minuend
/// @param b Subtrahend
/// @return Difference
function sub(int a, int b) internal pure returns (int) {
require(safeToSub(a, b));
return a - b;
}
/// @dev Returns product if no overflow occurred
/// @param a First factor
/// @param b Second factor
/// @return Product
function mul(int a, int b) internal pure returns (int) {
require(safeToMul(a, b));
return a * b;
}
}
// File: @gnosis.pm/util-contracts/contracts/GnosisStandardToken.sol
pragma solidity ^0.5.2;
/**
* Deprecated: Use Open Zeppeling one instead
*/
contract StandardTokenData {
/*
* Storage
*/
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowances;
uint totalTokens;
}
/**
* Deprecated: Use Open Zeppeling one instead
*/
/// @title Standard token contract with overflow protection
contract GnosisStandardToken is Token, StandardTokenData {
using GnosisMath for *;
/*
* Public functions
*/
/// @dev Transfers sender's tokens to a given address. Returns success
/// @param to Address of token receiver
/// @param value Number of tokens to transfer
/// @return Was transfer successful?
function transfer(address to, uint value) public returns (bool) {
if (!balances[msg.sender].safeToSub(value) || !balances[to].safeToAdd(value)) {
return false;
}
balances[msg.sender] -= value;
balances[to] += value;
emit Transfer(msg.sender, to, value);
return true;
}
/// @dev Allows allowed third party to transfer tokens from one address to another. Returns success
/// @param from Address from where tokens are withdrawn
/// @param to Address to where tokens are sent
/// @param value Number of tokens to transfer
/// @return Was transfer successful?
function transferFrom(address from, address to, uint value) public returns (bool) {
if (!balances[from].safeToSub(value) || !allowances[from][msg.sender].safeToSub(
value
) || !balances[to].safeToAdd(value)) {
return false;
}
balances[from] -= value;
allowances[from][msg.sender] -= value;
balances[to] += value;
emit Transfer(from, to, value);
return true;
}
/// @dev Sets approved amount of tokens for spender. Returns success
/// @param spender Address of allowed account
/// @param value Number of approved tokens
/// @return Was approval successful?
function approve(address spender, uint value) public returns (bool) {
allowances[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
/// @dev Returns number of allowed tokens for given address
/// @param owner Address of token owner
/// @param spender Address of token spender
/// @return Remaining allowance for spender
function allowance(address owner, address spender) public view returns (uint) {
return allowances[owner][spender];
}
/// @dev Returns number of tokens owned by given address
/// @param owner Address of token owner
/// @return Balance of owner
function balanceOf(address owner) public view returns (uint) {
return balances[owner];
}
/// @dev Returns total supply of tokens
/// @return Total supply
function totalSupply() public view returns (uint) {
return totalTokens;
}
}
// File: @gnosis.pm/dx-contracts/contracts/TokenFRT.sol
pragma solidity ^0.5.2;
/// @title Standard token contract with overflow protection
contract TokenFRT is Proxied, GnosisStandardToken {
address public owner;
string public constant symbol = "MGN";
string public constant name = "Magnolia Token";
uint8 public constant decimals = 18;
struct UnlockedToken {
uint amountUnlocked;
uint withdrawalTime;
}
/*
* Storage
*/
address public minter;
// user => UnlockedToken
mapping(address => UnlockedToken) public unlockedTokens;
// user => amount
mapping(address => uint) public lockedTokenBalances;
/*
* Public functions
*/
// @dev allows to set the minter of Magnolia tokens once.
// @param _minter the minter of the Magnolia tokens, should be the DX-proxy
function updateMinter(address _minter) public {
require(msg.sender == owner, "Only the minter can set a new one");
require(_minter != address(0), "The new minter must be a valid address");
minter = _minter;
}
// @dev the intention is to set the owner as the DX-proxy, once it is deployed
// Then only an update of the DX-proxy contract after a 30 days delay could change the minter again.
function updateOwner(address _owner) public {
require(msg.sender == owner, "Only the owner can update the owner");
require(_owner != address(0), "The new owner must be a valid address");
owner = _owner;
}
function mintTokens(address user, uint amount) public {
require(msg.sender == minter, "Only the minter can mint tokens");
lockedTokenBalances[user] = add(lockedTokenBalances[user], amount);
totalTokens = add(totalTokens, amount);
}
/// @dev Lock Token
function lockTokens(uint amount) public returns (uint totalAmountLocked) {
// Adjust amount by balance
uint actualAmount = min(amount, balances[msg.sender]);
// Update state variables
balances[msg.sender] = sub(balances[msg.sender], actualAmount);
lockedTokenBalances[msg.sender] = add(lockedTokenBalances[msg.sender], actualAmount);
// Get return variable
totalAmountLocked = lockedTokenBalances[msg.sender];
}
function unlockTokens() public returns (uint totalAmountUnlocked, uint withdrawalTime) {
// Adjust amount by locked balances
uint amount = lockedTokenBalances[msg.sender];
if (amount > 0) {
// Update state variables
lockedTokenBalances[msg.sender] = sub(lockedTokenBalances[msg.sender], amount);
unlockedTokens[msg.sender].amountUnlocked = add(unlockedTokens[msg.sender].amountUnlocked, amount);
unlockedTokens[msg.sender].withdrawalTime = now + 24 hours;
}
// Get return variables
totalAmountUnlocked = unlockedTokens[msg.sender].amountUnlocked;
withdrawalTime = unlockedTokens[msg.sender].withdrawalTime;
}
function withdrawUnlockedTokens() public {
require(unlockedTokens[msg.sender].withdrawalTime < now, "The tokens cannot be withdrawn yet");
balances[msg.sender] = add(balances[msg.sender], unlockedTokens[msg.sender].amountUnlocked);
unlockedTokens[msg.sender].amountUnlocked = 0;
}
function min(uint a, uint b) public pure returns (uint) {
if (a < b) {
return a;
} else {
return b;
}
}
/// @dev Returns whether an add operation causes an overflow
/// @param a First addend
/// @param b Second addend
/// @return Did no overflow occur?
function safeToAdd(uint a, uint b) public pure returns (bool) {
return a + b >= a;
}
/// @dev Returns whether a subtraction operation causes an underflow
/// @param a Minuend
/// @param b Subtrahend
/// @return Did no underflow occur?
function safeToSub(uint a, uint b) public pure returns (bool) {
return a >= b;
}
/// @dev Returns sum if no overflow occurred
/// @param a First addend
/// @param b Second addend
/// @return Sum
function add(uint a, uint b) public pure returns (uint) {
require(safeToAdd(a, b), "It must be a safe adition");
return a + b;
}
/// @dev Returns difference if no overflow occurred
/// @param a Minuend
/// @param b Subtrahend
/// @return Difference
function sub(uint a, uint b) public pure returns (uint) {
require(safeToSub(a, b), "It must be a safe substraction");
return a - b;
}
}
// File: openzeppelin-solidity/contracts/utils/Address.sol
pragma solidity ^0.5.2;
/**
* 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 ^0.5.2;
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(msg.sender, _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: contracts/DxMgnPool.sol
pragma solidity ^0.5.0;
contract DxMgnPool is Ownable {
using SafeMath for uint;
uint constant OWL_ALLOWANCE = 10**36;
struct Participation {
uint startAuctionCount; // how many auction passed when this participation started contributing
uint poolShares; // number of shares this participation accounts for (absolute)
}
mapping (address => bool) public hasParticpationWithdrawn;
enum State {
Pooling,
PoolingEnded,
DepositWithdrawnFromDx,
MgnUnlocked
}
State public currentState = State.Pooling;
mapping (address => Participation[]) public participationsByAddress;
uint public totalPoolShares; // total number of shares in this pool
uint public totalPoolSharesCummulative; // over all auctions, the rolling sum of all shares participated
uint public totalDeposit;
uint public totalMgn;
uint public lastParticipatedAuctionIndex;
uint public auctionCount;
ERC20 public depositToken;
ERC20 public secondaryToken;
TokenFRT public mgnToken;
IDutchExchange public dx;
uint public poolingPeriodEndTime;
constructor (
ERC20 _depositToken,
ERC20 _secondaryToken,
IDutchExchange _dx,
uint _poolingTimeSeconds
) public Ownable()
{
depositToken = _depositToken;
secondaryToken = _secondaryToken;
dx = _dx;
mgnToken = TokenFRT(dx.frtToken());
ERC20(dx.owlToken()).approve(address(dx), OWL_ALLOWANCE);
poolingPeriodEndTime = now + _poolingTimeSeconds;
}
/**
* Public interface
*/
function deposit(uint amount) public {
checkForStateUpdate();
require(currentState == State.Pooling, "Pooling is already over");
uint poolShares = calculatePoolShares(amount);
Participation memory participation = Participation({
startAuctionCount: isDepositTokenTurn() ? auctionCount : auctionCount + 1,
poolShares: poolShares
});
participationsByAddress[msg.sender].push(participation);
totalPoolShares += poolShares;
totalDeposit += amount;
SafeERC20.safeTransferFrom(address(depositToken), msg.sender, address(this), amount);
}
function withdrawDeposit() public returns(uint) {
require(currentState == State.DepositWithdrawnFromDx || currentState == State.MgnUnlocked, "Funds not yet withdrawn from dx");
require(!hasParticpationWithdrawn[msg.sender],"sender has already withdrawn funds");
uint totalDepositAmount = 0;
Participation[] storage participations = participationsByAddress[msg.sender];
uint length = participations.length;
for (uint i = 0; i < length; i++) {
totalDepositAmount += calculateClaimableDeposit(participations[i]);
}
hasParticpationWithdrawn[msg.sender] = true;
SafeERC20.safeTransfer(address(depositToken), msg.sender, totalDepositAmount);
return totalDepositAmount;
}
function withdrawMagnolia() public returns(uint) {
require(currentState == State.MgnUnlocked, "MGN has not been unlocked, yet");
require(hasParticpationWithdrawn[msg.sender], "Withdraw deposits first");
uint totalMgnClaimed = 0;
Participation[] memory participations = participationsByAddress[msg.sender];
for (uint i = 0; i < participations.length; i++) {
totalMgnClaimed += calculateClaimableMgn(participations[i]);
}
delete participationsByAddress[msg.sender];
delete hasParticpationWithdrawn[msg.sender];
SafeERC20.safeTransfer(address(mgnToken), msg.sender, totalMgnClaimed);
return totalMgnClaimed;
}
function withdrawDepositandMagnolia() public returns(uint, uint){
return (withdrawDeposit(),withdrawMagnolia());
}
function participateInAuction() public onlyOwner() {
checkForStateUpdate();
require(currentState == State.Pooling, "Pooling period is over.");
uint auctionIndex = dx.getAuctionIndex(address(depositToken), address(secondaryToken));
require(auctionIndex > lastParticipatedAuctionIndex, "Has to wait for new auction to start");
(address sellToken, address buyToken) = sellAndBuyToken();
uint depositAmount = depositToken.balanceOf(address(this));
if (isDepositTokenTurn()) {
totalPoolSharesCummulative += 2 * totalPoolShares;
if( depositAmount > 0){
//depositing new tokens
depositToken.approve(address(dx), depositAmount);
dx.deposit(address(depositToken), depositAmount);
}
}
// Don't revert if we can't claimSellerFunds
address(dx).call(abi.encodeWithSignature("claimSellerFunds(address,address,address,uint256)", buyToken, sellToken, address(this), lastParticipatedAuctionIndex));
uint amount = dx.balances(address(sellToken), address(this));
if (isDepositTokenTurn()) {
totalDeposit = amount;
}
(lastParticipatedAuctionIndex, ) = dx.postSellOrder(sellToken, buyToken, 0, amount);
auctionCount += 1;
}
function triggerMGNunlockAndClaimTokens() public {
checkForStateUpdate();
require(currentState == State.PoolingEnded, "Pooling period is not yet over.");
require(
dx.getAuctionIndex(address(depositToken), address(secondaryToken)) > lastParticipatedAuctionIndex,
"Last auction is still running"
);
// Don't revert if wen can't claimSellerFunds
address(dx).call(abi.encodeWithSignature("claimSellerFunds(address,address,address,uint256)", secondaryToken, depositToken, address(this), lastParticipatedAuctionIndex));
mgnToken.unlockTokens();
uint amountOfFundsInDX = dx.balances(address(depositToken), address(this));
totalDeposit = amountOfFundsInDX + depositToken.balanceOf(address(this));
if(amountOfFundsInDX > 0){
dx.withdraw(address(depositToken), amountOfFundsInDX);
}
currentState = State.DepositWithdrawnFromDx;
}
function withdrawUnlockedMagnoliaFromDx() public {
require(currentState == State.DepositWithdrawnFromDx, "Unlocking not yet triggered");
// Implicitly we also have:
// require(unlockedTokens[msg.sender].withdrawalTime < now, "The tokens cannot be withdrawn yet");
mgnToken.withdrawUnlockedTokens();
totalMgn = mgnToken.balanceOf(address(this));
currentState = State.MgnUnlocked;
}
function checkForStateUpdate() public {
if (now >= poolingPeriodEndTime && isDepositTokenTurn() && currentState == State.Pooling) {
currentState = State.PoolingEnded;
}
}
/// @dev updates state and returns val
function updateAndGetCurrentState() public returns(State) {
checkForStateUpdate();
return currentState;
}
/**
* Public View Functions
*/
function numberOfParticipations(address addr) public view returns (uint) {
return participationsByAddress[addr].length;
}
function participationAtIndex(address addr, uint index) public view returns (uint, uint) {
Participation memory participation = participationsByAddress[addr][index];
return (participation.startAuctionCount, participation.poolShares);
}
function poolSharesByAddress(address userAddress) external view returns(uint[] memory) {
uint length = participationsByAddress[userAddress].length;
uint[] memory userTotalPoolShares = new uint[](length);
for (uint i = 0; i < length; i++) {
userTotalPoolShares[i] = participationsByAddress[userAddress][i].poolShares;
}
return userTotalPoolShares;
}
function sellAndBuyToken() public view returns(address sellToken, address buyToken) {
if (isDepositTokenTurn()) {
return (address(depositToken), address(secondaryToken));
} else {
return (address(secondaryToken), address(depositToken));
}
}
function getAllClaimableMgnAndDeposits(address userAddress) external view returns(uint[] memory, uint[] memory) {
uint length = participationsByAddress[userAddress].length;
uint[] memory allUserClaimableMgn = new uint[](length);
uint[] memory allUserClaimableDeposit = new uint[](length);
for (uint i = 0; i < length; i++) {
allUserClaimableMgn[i] = calculateClaimableMgn(participationsByAddress[userAddress][i]);
allUserClaimableDeposit[i] = calculateClaimableDeposit(participationsByAddress[userAddress][i]);
}
return (allUserClaimableMgn, allUserClaimableDeposit);
}
/**
* Internal Helpers
*/
function calculatePoolShares(uint amount) private view returns (uint) {
if (totalDeposit == 0) {
return amount;
} else {
return totalPoolShares.mul(amount) / totalDeposit;
}
}
function isDepositTokenTurn() private view returns (bool) {
return auctionCount % 2 == 0;
}
function calculateClaimableMgn(Participation memory participation) private view returns (uint) {
if (totalPoolSharesCummulative == 0) {
return 0;
}
uint duration = auctionCount - participation.startAuctionCount;
return totalMgn.mul(participation.poolShares).mul(duration) / totalPoolSharesCummulative;
}
function calculateClaimableDeposit(Participation memory participation) private view returns (uint) {
if (totalPoolShares == 0) {
return 0;
}
return totalDeposit.mul(participation.poolShares) / totalPoolShares;
}
}
// File: contracts/Coordinator.sol
pragma solidity ^0.5.0;
contract Coordinator {
DxMgnPool public dxMgnPool1;
DxMgnPool public dxMgnPool2;
constructor (
ERC20 _token1,
ERC20 _token2,
IDutchExchange _dx,
uint _poolingTime
) public {
dxMgnPool1 = new DxMgnPool(_token1, _token2, _dx, _poolingTime);
dxMgnPool2 = new DxMgnPool(_token2, _token1, _dx, _poolingTime);
}
function participateInAuction() public {
dxMgnPool1.participateInAuction();
dxMgnPool2.participateInAuction();
}
function canParticipate() public returns (bool) {
uint auctionIndex = dxMgnPool1.dx().getAuctionIndex(
address(dxMgnPool1.depositToken()),
address(dxMgnPool1.secondaryToken())
);
// update the state before checking the currentState
dxMgnPool1.checkForStateUpdate();
// Since both auctions start at the same time, it suffices to check one.
return auctionIndex > dxMgnPool1.lastParticipatedAuctionIndex() && dxMgnPool1.currentState() == DxMgnPool.State.Pooling;
}
}