Contract Source Code:
pragma solidity ^0.6.0;
//pragma experimental ABIEncoderV2;
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
import './lib/Safe112.sol';
import './owner/Operator.sol';
import './utils/ContractGuard.sol';
import './interfaces/IBasisAsset.sol';
contract Boardroom is ContractGuard, Operator {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
using Safe112 for uint112;
/* ========== DATA STRUCTURES ========== */
struct Boardseat {
uint256 appointmentTime;
uint256 shares;
}
struct BoardSnapshot {
uint256 timestamp;
uint256 rewardReceived;
uint256 totalShares;
}
/* ========== STATE VARIABLES ========== */
IERC20 private cash;
IERC20 private share;
mapping(address => Boardseat) private directors;
BoardSnapshot[] private boardHistory;
/* ========== CONSTRUCTOR ========== */
constructor(IERC20 _cash, IERC20 _share) public {
cash = _cash;
share = _share;
BoardSnapshot memory genesisSnapshot = BoardSnapshot(now, 0, 0);
boardHistory.push(genesisSnapshot);
}
/* ========== Modifiers =============== */
modifier directorExists {
require(
directors[msg.sender].shares > 0,
'Boardroom: The director does not exist'
);
_;
}
/* ========== VIEW FUNCTIONS ========== */
function totalShare() public view returns (uint256) {
return boardHistory[boardHistory.length.sub(1)].totalShares;
}
function getShareOf(address director) public view returns (uint256) {
return directors[director].shares;
}
function getAppointmentTimeOf(address director)
public
view
returns (uint256)
{
return directors[director].appointmentTime;
}
function getCashEarningsOf(address director) public view returns (uint256) {
uint256 totalRewards = 0;
if (getShareOf(director) <= 0) {
return totalRewards;
}
for (uint256 i = boardHistory.length; i > 0; i = i.sub(1)) {
BoardSnapshot memory snapshot = boardHistory[i.sub(1)];
if (snapshot.timestamp < getAppointmentTimeOf(director)) {
break;
}
uint256 snapshotRewards = snapshot
.rewardReceived
.mul(getShareOf(director))
.div(snapshot.totalShares);
totalRewards = totalRewards.add(snapshotRewards);
}
return totalRewards;
}
/* ========== MUTATIVE FUNCTIONS ========== */
function claimDividends() public onlyOneBlock {
uint256 totalRewards = getCashEarningsOf(msg.sender);
directors[msg.sender].appointmentTime = now;
if (totalRewards > 0) {
cash.safeTransfer(msg.sender, totalRewards);
emit RewardPaid(msg.sender, totalRewards);
}
}
function stake(uint256 amount) external {
require(amount > 0, 'Boardroom: Cannot stake 0');
// Claim all outstanding dividends before making state changes
claimDividends();
// Update director's boardseat
Boardseat memory director = directors[msg.sender];
director.shares = director.shares.add(amount);
directors[msg.sender] = director;
// Update latest snapshot
uint256 snapshotIndex = boardHistory.length.sub(1);
boardHistory[snapshotIndex].totalShares = totalShare().add(amount);
share.safeTransferFrom(msg.sender, address(this), amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount) public directorExists {
require(amount > 0, 'Boardroom: Cannot withdraw 0');
// Claim all outstanding dividends before making state changes
claimDividends();
// Update director's boardseat
uint256 directorShare = getShareOf(msg.sender);
require(
directorShare >= amount,
'Boardroom: withdraw request greater than staked amount'
);
directors[msg.sender].shares = directorShare.sub(amount);
// Update latest snapshot
uint256 snapshotIndex = boardHistory.length.sub(1);
boardHistory[snapshotIndex].totalShares = totalShare().sub(amount);
share.safeTransfer(msg.sender, amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(getShareOf(msg.sender));
}
function allocateSeigniorage(uint256 amount)
external
onlyOneBlock
onlyOperator
{
require(amount > 0, 'Boardroom: Cannot allocate 0');
// Create & add new snapshot
BoardSnapshot memory newSnapshot = BoardSnapshot({
timestamp: now,
rewardReceived: amount,
totalShares: totalShare()
});
boardHistory.push(newSnapshot);
cash.safeTransferFrom(msg.sender, address(this), amount);
emit RewardAdded(msg.sender, amount);
}
/* ========== EVENTS ========== */
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
event RewardAdded(address indexed user, uint256 reward);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: 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
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
pragma solidity ^0.6.0;
library Safe112 {
function add(uint112 a, uint112 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, 'Safe112: addition overflow');
return c;
}
function sub(uint112 a, uint112 b) internal pure returns (uint256) {
return sub(a, b, 'Safe112: subtraction overflow');
}
function sub(
uint112 a,
uint112 b,
string memory errorMessage
) internal pure returns (uint112) {
require(b <= a, errorMessage);
uint112 c = a - b;
return c;
}
function mul(uint112 a, uint112 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, 'Safe112: multiplication overflow');
return c;
}
function div(uint112 a, uint112 b) internal pure returns (uint256) {
return div(a, b, 'Safe112: division by zero');
}
function div(
uint112 a,
uint112 b,
string memory errorMessage
) internal pure returns (uint112) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint112 c = a / b;
return c;
}
function mod(uint112 a, uint112 b) internal pure returns (uint256) {
return mod(a, b, 'Safe112: modulo by zero');
}
function mod(
uint112 a,
uint112 b,
string memory errorMessage
) internal pure returns (uint112) {
require(b != 0, errorMessage);
return a % b;
}
}
pragma solidity ^0.6.0;
import '@openzeppelin/contracts/GSN/Context.sol';
import '@openzeppelin/contracts/access/Ownable.sol';
contract Operator is Context, Ownable {
address private _operator;
event OperatorTransferred(
address indexed previousOperator,
address indexed newOperator
);
constructor() internal {
_operator = _msgSender();
emit OperatorTransferred(address(0), _operator);
}
function operator() public view returns (address) {
return _operator;
}
modifier onlyOperator() {
require(
_operator == msg.sender,
'operator: caller is not the operator'
);
_;
}
function isOperator() public view returns (bool) {
return _msgSender() == _operator;
}
function transferOperator(address newOperator_) public onlyOwner {
_transferOperator(newOperator_);
}
function _transferOperator(address newOperator_) internal {
require(
newOperator_ != address(0),
'operator: zero address given for new operator'
);
emit OperatorTransferred(address(0), newOperator_);
_operator = newOperator_;
}
}
pragma solidity ^0.6.12;
contract ContractGuard {
mapping(uint256 => mapping(address => bool)) private _status;
modifier onlyOneBlock() {
require(
!_status[block.number][tx.origin],
'ContractGuard: one block, one function'
);
_;
_status[block.number][tx.origin] = true;
}
}
pragma solidity ^0.6.0;
interface IBasisAsset {
function mint(address recipient, uint256 amount) external returns (bool);
function burn(uint256 amount) external;
function burnFrom(address from, uint256 amount) external;
function isOperator() external returns (bool);
function operator() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot 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-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "../GSN/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
pragma solidity ^0.6.0;
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '../Treasury.sol';
import '../Boardroom.sol';
import '../owner/Operator.sol';
contract Tester is Operator {
Treasury public treasury;
Boardroom public boardroom;
constructor(address _treasury, address _boardroom) public {
treasury = Treasury(_treasury);
boardroom = Boardroom(_boardroom);
}
event OKOnlyOperator(address caller);
function OnlyOperator() public onlyOperator {
emit OKOnlyOperator(msg.sender);
}
function actionTreasury() public {
treasury.allocateSeigniorage();
treasury.allocateSeigniorage(); // should revert
}
function actionBoardroom(address share, uint256 amount) public {
IERC20(share).approve(address(boardroom), amount);
boardroom.stake(amount);
boardroom.withdraw(amount); // should revert
}
}
pragma solidity ^0.6.0;
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
import '@openzeppelin/contracts/utils/ReentrancyGuard.sol';
import './lib/Babylonian.sol';
import './lib/FixedPoint.sol';
import './lib/Safe112.sol';
import './owner/Operator.sol';
import './utils/ContractGuard.sol';
import './interfaces/IBasisAsset.sol';
import './interfaces/IOracle.sol';
import './interfaces/IBoardroom.sol';
/**
* @title Basis Cash Treasury contract
* @notice Monetary policy logic to adjust supplies of basis cash assets
* @author Summer Smith & Rick Sanchez
*/
contract Treasury is ContractGuard, Operator {
using FixedPoint for *;
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
using Safe112 for uint112;
/* ========= CONSTANT VARIABLES ======== */
uint256 public constant allocationDelay = 1 days;
/* ========== STATE VARIABLES ========== */
address private cash;
address private bond;
address private share;
address private boardroom;
IOracle private cashOracle;
bool private migrated = false;
uint256 private seigniorageSaved = 0;
uint256 public startTime;
uint256 public cashPriceCeiling;
uint256 public cashPriceOne;
uint256 private bondDepletionFloor;
uint256 private lastAllocated;
/* ========== CONSTRUCTOR ========== */
constructor(
address _cash,
address _bond,
address _share,
address _cashOracle,
address _boardroom,
uint256 _startTime
) public {
cash = _cash;
bond = _bond;
share = _share;
cashOracle = IOracle(_cashOracle);
boardroom = _boardroom;
startTime = _startTime;
cashPriceOne = 10**18;
cashPriceCeiling = uint256(105).mul(cashPriceOne).div(10**2);
bondDepletionFloor = uint256(1000).mul(cashPriceOne);
lastAllocated = now;
}
/* ========== MODIFIER ========== */
modifier checkMigration {
require(!migrated, 'Treasury: this contract has been migrated');
_;
}
modifier checkOperator {
require(
IBasisAsset(cash).operator() == address(this),
'Treasury: this contract is not the operator of the basis cash contract'
);
require(
IBasisAsset(bond).operator() == address(this),
'Treasury: this contract is not the operator of the basis bond contract'
);
require(
Operator(boardroom).operator() == address(this),
'Treasury: this contract is not the operator of the boardroom contract'
);
_;
}
/* ========== VIEW FUNCTIONS ========== */
function getCashPrice() public view returns (uint256 cashPrice) {
try cashOracle.consult(cash, 1e18) returns (uint256 price) {
return price;
} catch {
revert('Treasury: failed to consult cash price from the oracle');
}
}
/* ========== GOVERNANCE ========== */
function migrate(address target) public onlyOperator checkMigration {
require(block.timestamp >= startTime, 'Treasury: not started yet');
// cash
Operator(cash).transferOperator(target);
Operator(cash).transferOwnership(target);
IERC20(cash).transfer(target, IERC20(cash).balanceOf(address(this)));
// bond
Operator(bond).transferOperator(target);
Operator(bond).transferOwnership(target);
IERC20(bond).transfer(target, IERC20(bond).balanceOf(address(this)));
// share
Operator(share).transferOperator(target);
Operator(share).transferOwnership(target);
IERC20(share).transfer(target, IERC20(share).balanceOf(address(this)));
migrated = true;
emit Migration(target);
}
/* ========== MUTABLE FUNCTIONS ========== */
function _getCashPrice() internal returns (uint256 cashPrice) {
cashPrice = getCashPrice();
try cashOracle.update() {} catch {
revert('Treasury: failed to update cash oracle');
}
}
function _allocateSeigniorage(uint256 cashPrice)
internal
onlyOneBlock
checkOperator
checkMigration
returns (bool, string memory)
{
if (now.sub(lastAllocated) < allocationDelay) {
return (false, 'Treasury: a day has not passed yet');
}
if (block.timestamp < startTime) {
return (false, 'Treasury: not started yet');
}
if (cashPrice <= cashPriceCeiling) {
return (false, 'Treasury: there is no seigniorage to be allocated');
}
uint256 cashSupply = IERC20(cash).totalSupply();
uint256 percentage = cashPrice.sub(cashPriceOne);
uint256 seigniorage = cashSupply.mul(percentage).div(1e18);
if (seigniorageSaved > bondDepletionFloor) {
IBasisAsset(cash).mint(address(this), seigniorage);
IERC20(cash).safeApprove(boardroom, seigniorage);
IBoardroom(boardroom).allocateSeigniorage(seigniorage);
emit BoardroomFunded(now, seigniorage);
} else {
seigniorageSaved = seigniorageSaved.add(seigniorage);
IBasisAsset(cash).mint(address(this), seigniorage);
emit TreasuryFunded(now, seigniorage);
}
lastAllocated = now;
return (true, 'Treasury: success');
}
function buyBonds(uint256 amount, uint256 targetPrice) external {
require(amount > 0, 'Treasury: cannot purchase bonds with zero amount');
uint256 cashPrice = _getCashPrice();
require(cashPrice == targetPrice, 'Treasury: cash price moved');
_allocateSeigniorage(cashPrice); // ignore returns
uint256 bondPrice = cashPrice;
IBasisAsset(cash).burnFrom(msg.sender, amount);
IBasisAsset(bond).mint(msg.sender, amount.mul(1e18).div(bondPrice));
emit BoughtBonds(msg.sender, amount);
}
function redeemBonds(uint256 amount, uint256 targetPrice) external {
require(amount > 0, 'Treasury: cannot redeem bonds with zero amount');
uint256 cashPrice = _getCashPrice();
require(cashPrice == targetPrice, 'Treasury: cash price moved');
_allocateSeigniorage(cashPrice); // ignore returns
require(
cashPrice > cashPriceCeiling,
'Treasury: bond redemption failed; basis cash remains depegged.'
);
uint256 treasuryBalance = IERC20(cash).balanceOf(address(this));
require(
treasuryBalance >= amount,
'Treasury: treasury has no more budget'
);
if (seigniorageSaved >= amount) {
seigniorageSaved = seigniorageSaved.sub(amount);
} else {
seigniorageSaved = 0;
}
IBasisAsset(bond).burnFrom(msg.sender, amount);
IERC20(cash).safeTransfer(msg.sender, amount);
emit RedeemedBonds(msg.sender, amount);
}
function allocateSeigniorage() external {
uint256 cashPrice = _getCashPrice();
(bool result, string memory reason) = _allocateSeigniorage(cashPrice);
require(result, reason);
}
event Migration(address indexed target);
event RedeemedBonds(address indexed from, uint256 amount);
event BoughtBonds(address indexed from, uint256 amount);
event TreasuryFunded(uint256 timestamp, uint256 seigniorage);
event BoardroomFunded(uint256 timestamp, uint256 seigniorage);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
pragma solidity ^0.6.0;
library Babylonian {
function sqrt(uint256 y) internal pure returns (uint256 z) {
if (y > 3) {
z = y;
uint256 x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 1;
}
// else z = 0
}
}
pragma solidity ^0.6.0;
import './Babylonian.sol';
// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
library FixedPoint {
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
struct uq112x112 {
uint224 _x;
}
// range: [0, 2**144 - 1]
// resolution: 1 / 2**112
struct uq144x112 {
uint256 _x;
}
uint8 private constant RESOLUTION = 112;
uint256 private constant Q112 = uint256(1) << RESOLUTION;
uint256 private constant Q224 = Q112 << RESOLUTION;
// encode a uint112 as a UQ112x112
function encode(uint112 x) internal pure returns (uq112x112 memory) {
return uq112x112(uint224(x) << RESOLUTION);
}
// encodes a uint144 as a UQ144x112
function encode144(uint144 x) internal pure returns (uq144x112 memory) {
return uq144x112(uint256(x) << RESOLUTION);
}
// divide a UQ112x112 by a uint112, returning a UQ112x112
function div(uq112x112 memory self, uint112 x)
internal
pure
returns (uq112x112 memory)
{
require(x != 0, 'FixedPoint: DIV_BY_ZERO');
return uq112x112(self._x / uint224(x));
}
// multiply a UQ112x112 by a uint, returning a UQ144x112
// reverts on overflow
function mul(uq112x112 memory self, uint256 y)
internal
pure
returns (uq144x112 memory)
{
uint256 z;
require(
y == 0 || (z = uint256(self._x) * y) / y == uint256(self._x),
'FixedPoint: MULTIPLICATION_OVERFLOW'
);
return uq144x112(z);
}
// returns a UQ112x112 which represents the ratio of the numerator to the denominator
// equivalent to encode(numerator).div(denominator)
function fraction(uint112 numerator, uint112 denominator)
internal
pure
returns (uq112x112 memory)
{
require(denominator > 0, 'FixedPoint: DIV_BY_ZERO');
return uq112x112((uint224(numerator) << RESOLUTION) / denominator);
}
// decode a UQ112x112 into a uint112 by truncating after the radix point
function decode(uq112x112 memory self) internal pure returns (uint112) {
return uint112(self._x >> RESOLUTION);
}
// decode a UQ144x112 into a uint144 by truncating after the radix point
function decode144(uq144x112 memory self) internal pure returns (uint144) {
return uint144(self._x >> RESOLUTION);
}
// take the reciprocal of a UQ112x112
function reciprocal(uq112x112 memory self)
internal
pure
returns (uq112x112 memory)
{
require(self._x != 0, 'FixedPoint: ZERO_RECIPROCAL');
return uq112x112(uint224(Q224 / self._x));
}
// square root of a UQ112x112
function sqrt(uq112x112 memory self)
internal
pure
returns (uq112x112 memory)
{
return uq112x112(uint224(Babylonian.sqrt(uint256(self._x)) << 56));
}
}
pragma solidity ^0.6.0;
interface IOracle {
function update() external;
function consult(address token, uint256 amountIn)
external
view
returns (uint256 amountOut);
// function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestamp);
}
pragma solidity ^0.6.0;
interface IBoardroom {
function allocateSeigniorage(uint256 amount) external;
}
pragma solidity ^0.6.0;
import '@openzeppelin/contracts/math/SafeMath.sol';
import './lib/Babylonian.sol';
import './lib/FixedPoint.sol';
import './lib/UniswapV2Library.sol';
import './lib/UniswapV2OracleLibrary.sol';
import './interfaces/IUniswapV2Pair.sol';
import './interfaces/IUniswapV2Factory.sol';
// fixed window oracle that recomputes the average price for the entire period once every period
// note that the price average is only guaranteed to be over at least 1 period, but may be over a longer period
contract Oracle {
using FixedPoint for *;
uint256 public constant PERIOD = 10 minutes;
IUniswapV2Pair public pair;
address public token0;
address public token1;
uint256 public price0CumulativeLast;
uint256 public price1CumulativeLast;
uint32 public blockTimestampLast;
FixedPoint.uq112x112 public price0Average;
FixedPoint.uq112x112 public price1Average;
constructor(
address factory,
address tokenA,
address tokenB
) public {
IUniswapV2Pair _pair = IUniswapV2Pair(
UniswapV2Library.pairFor(factory, tokenA, tokenB)
);
pair = _pair;
token0 = _pair.token0();
token1 = _pair.token1();
price0CumulativeLast = _pair.price0CumulativeLast(); // fetch the current accumulated price value (1 / 0)
price1CumulativeLast = _pair.price1CumulativeLast(); // fetch the current accumulated price value (0 / 1)
uint112 reserve0;
uint112 reserve1;
(reserve0, reserve1, blockTimestampLast) = _pair.getReserves();
require(reserve0 != 0 && reserve1 != 0, 'Oracle: NO_RESERVES'); // ensure that there's liquidity in the pair
}
/** @dev Updates 1-day EMA price from Uniswap. */
function update() external {
(
uint256 price0Cumulative,
uint256 price1Cumulative,
uint32 blockTimestamp
) = UniswapV2OracleLibrary.currentCumulativePrices(address(pair));
uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
if (timeElapsed < PERIOD) {
// doesn't need to be updated, since a minimum period is not elapsed yet
return;
}
// overflow is desired, casting never truncates
// cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed
price0Average = FixedPoint.uq112x112(
uint224((price0Cumulative - price0CumulativeLast) / timeElapsed)
);
price1Average = FixedPoint.uq112x112(
uint224((price1Cumulative - price1CumulativeLast) / timeElapsed)
);
price0CumulativeLast = price0Cumulative;
price1CumulativeLast = price1Cumulative;
blockTimestampLast = blockTimestamp;
emit Updated(price0Cumulative, price1Cumulative);
}
// note this will always return 0 before update has been called successfully for the first time.
function consult(address token, uint256 amountIn)
external
view
returns (uint144 amountOut)
{
if (token == token0) {
amountOut = price0Average.mul(amountIn).decode144();
} else {
require(token == token1, 'Oracle: INVALID_TOKEN');
amountOut = price1Average.mul(amountIn).decode144();
}
}
function pairFor(
address factory,
address tokenA,
address tokenB
) external pure returns (address lpt) {
return UniswapV2Library.pairFor(factory, tokenA, tokenB);
}
event Updated(uint256 price0CumulativeLast, uint256 price1CumulativeLast);
}
pragma solidity ^0.6.0;
import '@openzeppelin/contracts/math/SafeMath.sol';
import '../interfaces/IUniswapV2Pair.sol';
library UniswapV2Library {
using SafeMath for uint256;
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB)
internal
pure
returns (address token0, address token1)
{
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB
? (tokenA, tokenB)
: (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(
address factory,
address tokenA,
address tokenB
) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(
uint256(
keccak256(
abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
)
)
)
);
}
// fetches and sorts the reserves for a pair
function getReserves(
address factory,
address tokenA,
address tokenB
) internal view returns (uint256 reserveA, uint256 reserveB) {
(address token0, ) = sortTokens(tokenA, tokenB);
(uint256 reserve0, uint256 reserve1, ) = IUniswapV2Pair(
pairFor(factory, tokenA, tokenB)
)
.getReserves();
(reserveA, reserveB) = tokenA == token0
? (reserve0, reserve1)
: (reserve1, reserve0);
}
// given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) internal pure returns (uint256 amountB) {
require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT');
require(
reserveA > 0 && reserveB > 0,
'UniswapV2Library: INSUFFICIENT_LIQUIDITY'
);
amountB = amountA.mul(reserveB) / reserveA;
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) internal pure returns (uint256 amountOut) {
require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
require(
reserveIn > 0 && reserveOut > 0,
'UniswapV2Library: INSUFFICIENT_LIQUIDITY'
);
uint256 amountInWithFee = amountIn.mul(997);
uint256 numerator = amountInWithFee.mul(reserveOut);
uint256 denominator = reserveIn.mul(1000).add(amountInWithFee);
amountOut = numerator / denominator;
}
// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) internal pure returns (uint256 amountIn) {
require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
require(
reserveIn > 0 && reserveOut > 0,
'UniswapV2Library: INSUFFICIENT_LIQUIDITY'
);
uint256 numerator = reserveIn.mul(amountOut).mul(1000);
uint256 denominator = reserveOut.sub(amountOut).mul(997);
amountIn = (numerator / denominator).add(1);
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(
address factory,
uint256 amountIn,
address[] memory path
) internal view returns (uint256[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint256[](path.length);
amounts[0] = amountIn;
for (uint256 i; i < path.length - 1; i++) {
(uint256 reserveIn, uint256 reserveOut) = getReserves(
factory,
path[i],
path[i + 1]
);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
}
}
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(
address factory,
uint256 amountOut,
address[] memory path
) internal view returns (uint256[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint256[](path.length);
amounts[amounts.length - 1] = amountOut;
for (uint256 i = path.length - 1; i > 0; i--) {
(uint256 reserveIn, uint256 reserveOut) = getReserves(
factory,
path[i - 1],
path[i]
);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
}
pragma solidity ^0.6.0;
import './FixedPoint.sol';
import '../interfaces/IUniswapV2Pair.sol';
// library with helper methods for oracles that are concerned with computing average prices
library UniswapV2OracleLibrary {
using FixedPoint for *;
// helper function that returns the current block timestamp within the range of uint32, i.e. [0, 2**32 - 1]
function currentBlockTimestamp() internal view returns (uint32) {
return uint32(block.timestamp % 2**32);
}
// produces the cumulative price using counterfactuals to save gas and avoid a call to sync.
function currentCumulativePrices(address pair)
internal
view
returns (
uint256 price0Cumulative,
uint256 price1Cumulative,
uint32 blockTimestamp
)
{
blockTimestamp = currentBlockTimestamp();
price0Cumulative = IUniswapV2Pair(pair).price0CumulativeLast();
price1Cumulative = IUniswapV2Pair(pair).price1CumulativeLast();
// if time has elapsed since the last update on the pair, mock the accumulated price values
(
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
) = IUniswapV2Pair(pair).getReserves();
if (blockTimestampLast != blockTimestamp) {
// subtraction overflow is desired
uint32 timeElapsed = blockTimestamp - blockTimestampLast;
// addition overflow is desired
// counterfactual
price0Cumulative +=
uint256(FixedPoint.fraction(reserve1, reserve0)._x) *
timeElapsed;
// counterfactual
price1Cumulative +=
uint256(FixedPoint.fraction(reserve0, reserve1)._x) *
timeElapsed;
}
}
}
pragma solidity ^0.6.0;
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
pragma solidity ^0.6.0;
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
pragma solidity ^0.6.0;
/*
* Copyright 2020 Compound Labs, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import '@openzeppelin/contracts/math/SafeMath.sol';
contract Timelock {
using SafeMath for uint256;
event NewAdmin(address indexed newAdmin);
event NewPendingAdmin(address indexed newPendingAdmin);
event NewDelay(uint256 indexed newDelay);
event CancelTransaction(
bytes32 indexed txHash,
address indexed target,
uint256 value,
string signature,
bytes data,
uint256 eta
);
event ExecuteTransaction(
bytes32 indexed txHash,
address indexed target,
uint256 value,
string signature,
bytes data,
uint256 eta
);
event QueueTransaction(
bytes32 indexed txHash,
address indexed target,
uint256 value,
string signature,
bytes data,
uint256 eta
);
uint256 public constant GRACE_PERIOD = 14 days;
uint256 public constant MINIMUM_DELAY = 2 days;
uint256 public constant MAXIMUM_DELAY = 30 days;
address public admin;
address public pendingAdmin;
uint256 public delay;
mapping(bytes32 => bool) public queuedTransactions;
constructor(address admin_, uint256 delay_) public {
require(
delay_ >= MINIMUM_DELAY,
'Timelock::constructor: Delay must exceed minimum delay.'
);
require(
delay_ <= MAXIMUM_DELAY,
'Timelock::setDelay: Delay must not exceed maximum delay.'
);
admin = admin_;
delay = delay_;
}
receive() external payable {}
function setDelay(uint256 delay_) public {
require(
msg.sender == address(this),
'Timelock::setDelay: Call must come from Timelock.'
);
require(
delay_ >= MINIMUM_DELAY,
'Timelock::setDelay: Delay must exceed minimum delay.'
);
require(
delay_ <= MAXIMUM_DELAY,
'Timelock::setDelay: Delay must not exceed maximum delay.'
);
delay = delay_;
emit NewDelay(delay);
}
function acceptAdmin() public {
require(
msg.sender == pendingAdmin,
'Timelock::acceptAdmin: Call must come from pendingAdmin.'
);
admin = msg.sender;
pendingAdmin = address(0);
emit NewAdmin(admin);
}
function setPendingAdmin(address pendingAdmin_) public {
require(
msg.sender == address(this),
'Timelock::setPendingAdmin: Call must come from Timelock.'
);
pendingAdmin = pendingAdmin_;
emit NewPendingAdmin(pendingAdmin);
}
function queueTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 eta
) public returns (bytes32) {
require(
msg.sender == admin,
'Timelock::queueTransaction: Call must come from admin.'
);
require(
eta >= getBlockTimestamp().add(delay),
'Timelock::queueTransaction: Estimated execution block must satisfy delay.'
);
bytes32 txHash = keccak256(
abi.encode(target, value, signature, data, eta)
);
queuedTransactions[txHash] = true;
emit QueueTransaction(txHash, target, value, signature, data, eta);
return txHash;
}
function cancelTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 eta
) public {
require(
msg.sender == admin,
'Timelock::cancelTransaction: Call must come from admin.'
);
bytes32 txHash = keccak256(
abi.encode(target, value, signature, data, eta)
);
queuedTransactions[txHash] = false;
emit CancelTransaction(txHash, target, value, signature, data, eta);
}
function executeTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 eta
) public payable returns (bytes memory) {
require(
msg.sender == admin,
'Timelock::executeTransaction: Call must come from admin.'
);
bytes32 txHash = keccak256(
abi.encode(target, value, signature, data, eta)
);
require(
queuedTransactions[txHash],
"Timelock::executeTransaction: Transaction hasn't been queued."
);
require(
getBlockTimestamp() >= eta,
"Timelock::executeTransaction: Transaction hasn't surpassed time lock."
);
require(
getBlockTimestamp() <= eta.add(GRACE_PERIOD),
'Timelock::executeTransaction: Transaction is stale.'
);
queuedTransactions[txHash] = false;
bytes memory callData;
if (bytes(signature).length == 0) {
callData = data;
} else {
callData = abi.encodePacked(
bytes4(keccak256(bytes(signature))),
data
);
}
// solium-disable-next-line security/no-call-value
(bool success, bytes memory returnData) = target.call{value: value}(
callData
);
require(
success,
'Timelock::executeTransaction: Transaction execution reverted.'
);
emit ExecuteTransaction(txHash, target, value, signature, data, eta);
return returnData;
}
function getBlockTimestamp() internal view returns (uint256) {
// solium-disable-next-line security/no-block-members
return block.timestamp;
}
}
pragma solidity ^0.6.0;
import '@openzeppelin/contracts/math/SafeMath.sol';
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '../interfaces/IDistributor.sol';
import '../interfaces/IRewardDistributionRecipient.sol';
contract InitialShareDistributor is IDistributor {
using SafeMath for uint256;
event Distributed(address pool, uint256 cashAmount);
bool public once = true;
IERC20 public share;
IRewardDistributionRecipient public daibacLPPool;
uint256 public daibacInitialBalance;
IRewardDistributionRecipient public daibasLPPool;
uint256 public daibasInitialBalance;
constructor(
IERC20 _share,
IRewardDistributionRecipient _daibacLPPool,
uint256 _daibacInitialBalance,
IRewardDistributionRecipient _daibasLPPool,
uint256 _daibasInitialBalance
) public {
share = _share;
daibacLPPool = _daibacLPPool;
daibacInitialBalance = _daibacInitialBalance;
daibasLPPool = _daibasLPPool;
daibasInitialBalance = _daibasInitialBalance;
}
function distribute() public override {
require(
once,
'InitialShareDistributor: you cannot run this function twice'
);
share.transfer(address(daibacLPPool), daibacInitialBalance);
daibacLPPool.notifyRewardAmount(daibacInitialBalance);
emit Distributed(address(daibacLPPool), daibacInitialBalance);
share.transfer(address(daibasLPPool), daibasInitialBalance);
daibasLPPool.notifyRewardAmount(daibasInitialBalance);
emit Distributed(address(daibasLPPool), daibasInitialBalance);
once = false;
}
}
pragma solidity ^0.6.0;
interface IDistributor {
function distribute() external;
}
pragma solidity ^0.6.0;
import '@openzeppelin/contracts/access/Ownable.sol';
abstract contract IRewardDistributionRecipient is Ownable {
address public rewardDistribution;
function notifyRewardAmount(uint256 reward) external virtual;
modifier onlyRewardDistribution() {
require(
_msgSender() == rewardDistribution,
'Caller is not reward distribution'
);
_;
}
function setRewardDistribution(address _rewardDistribution)
external
virtual
onlyOwner
{
rewardDistribution = _rewardDistribution;
}
}
pragma solidity ^0.6.0;
/**
*Submitted for verification at Etherscan.io on 2020-07-17
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: BASISCASHRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
// File: @openzeppelin/contracts/math/Math.sol
import '@openzeppelin/contracts/math/Math.sol';
// File: @openzeppelin/contracts/math/SafeMath.sol
import '@openzeppelin/contracts/math/SafeMath.sol';
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
// File: @openzeppelin/contracts/utils/Address.sol
import '@openzeppelin/contracts/utils/Address.sol';
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
// File: contracts/IRewardDistributionRecipient.sol
import '../interfaces/IRewardDistributionRecipient.sol';
import '../token/LPTokenWrapper.sol';
contract DAIBASLPTokenSharePool is
LPTokenWrapper,
IRewardDistributionRecipient
{
IERC20 public basisShare;
uint256 public DURATION = 365 days;
uint256 public starttime;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
constructor(
address basisShare_,
address lptoken_,
uint256 starttime_
) public {
basisShare = IERC20(basisShare_);
lpt = IERC20(lptoken_);
starttime = starttime_;
}
modifier checkStart() {
require(
block.timestamp >= starttime,
'DAIBASLPTokenSharePool: not start'
);
_;
}
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address account) public view returns (uint256) {
return
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
// stake visibility is public as overriding LPTokenWrapper's stake() function
function stake(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'DAIBASLPTokenSharePool: Cannot stake 0');
super.stake(amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'DAIBASLPTokenSharePool: Cannot withdraw 0');
super.withdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) checkStart {
uint256 reward = earned(msg.sender);
if (reward > 0) {
rewards[msg.sender] = 0;
basisShare.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function notifyRewardAmount(uint256 reward)
external
override
onlyRewardDistribution
updateReward(address(0))
{
if (block.timestamp > starttime) {
if (block.timestamp >= periodFinish) {
rewardRate = reward.div(DURATION);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(DURATION);
}
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(reward);
} else {
rewardRate = reward.div(DURATION);
lastUpdateTime = starttime;
periodFinish = starttime.add(DURATION);
emit RewardAdded(reward);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
pragma solidity ^0.6.0;
import '@openzeppelin/contracts/math/SafeMath.sol';
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
contract LPTokenWrapper {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IERC20 public lpt;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function stake(uint256 amount) public virtual {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
lpt.safeTransferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 amount) public virtual {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
lpt.safeTransfer(msg.sender, amount);
}
}
pragma solidity ^0.6.0;
/**
*Submitted for verification at Etherscan.io on 2020-07-17
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: BASISCASHRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
// File: @openzeppelin/contracts/math/Math.sol
import '@openzeppelin/contracts/math/Math.sol';
// File: @openzeppelin/contracts/math/SafeMath.sol
import '@openzeppelin/contracts/math/SafeMath.sol';
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
// File: @openzeppelin/contracts/utils/Address.sol
import '@openzeppelin/contracts/utils/Address.sol';
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
// File: contracts/IRewardDistributionRecipient.sol
import '../interfaces/IRewardDistributionRecipient.sol';
import '../token/LPTokenWrapper.sol';
contract DAIBACLPTokenSharePool is
LPTokenWrapper,
IRewardDistributionRecipient
{
IERC20 public basisShare;
uint256 public constant DURATION = 30 days;
uint256 public initreward = 18479995 * 10**16; // 184,799.95 Shares
uint256 public starttime; // starttime TBD
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
constructor(
address basisShare_,
address lptoken_,
uint256 starttime_
) public {
basisShare = IERC20(basisShare_);
lpt = IERC20(lptoken_);
starttime = starttime_;
}
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address account) public view returns (uint256) {
return
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
// stake visibility is public as overriding LPTokenWrapper's stake() function
function stake(uint256 amount)
public
override
updateReward(msg.sender)
checkhalve
checkStart
{
require(amount > 0, 'Cannot stake 0');
super.stake(amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount)
public
override
updateReward(msg.sender)
checkhalve
checkStart
{
require(amount > 0, 'Cannot withdraw 0');
super.withdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) checkhalve checkStart {
uint256 reward = earned(msg.sender);
if (reward > 0) {
rewards[msg.sender] = 0;
basisShare.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
modifier checkhalve() {
if (block.timestamp >= periodFinish) {
initreward = initreward.mul(75).div(100);
rewardRate = initreward.div(DURATION);
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(initreward);
}
_;
}
modifier checkStart() {
require(block.timestamp >= starttime, 'not start');
_;
}
function notifyRewardAmount(uint256 reward)
external
override
onlyRewardDistribution
updateReward(address(0))
{
if (block.timestamp > starttime) {
if (block.timestamp >= periodFinish) {
rewardRate = reward.div(DURATION);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(DURATION);
}
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(reward);
} else {
rewardRate = initreward.div(DURATION);
lastUpdateTime = starttime;
periodFinish = starttime.add(DURATION);
emit RewardAdded(reward);
}
}
}
pragma solidity ^0.6.0;
/**
*Submitted for verification at Etherscan.io on 2020-07-17
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: BASISCASHRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
// File: @openzeppelin/contracts/math/Math.sol
import '@openzeppelin/contracts/math/Math.sol';
// File: @openzeppelin/contracts/math/SafeMath.sol
import '@openzeppelin/contracts/math/SafeMath.sol';
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
// File: @openzeppelin/contracts/utils/Address.sol
import '@openzeppelin/contracts/utils/Address.sol';
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
// File: contracts/IRewardDistributionRecipient.sol
import '../interfaces/IRewardDistributionRecipient.sol';
contract yCRVWrapper {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IERC20 public ycrv;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
function totalSupply() public virtual view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public virtual view returns (uint256) {
return _balances[account];
}
function stake(uint256 amount) public virtual {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
ycrv.safeTransferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 amount) public virtual {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
ycrv.safeTransfer(msg.sender, amount);
}
}
contract BACyCRVPool is yCRVWrapper, IRewardDistributionRecipient {
IERC20 public basisCash;
uint256 public DURATION = 5 days;
uint256 public starttime;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
mapping(address => uint256) public deposits;
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
constructor(
address basisCash_,
address ycrv_,
uint256 starttime_
) public {
basisCash = IERC20(basisCash_);
ycrv = IERC20(ycrv_);
starttime = starttime_;
}
modifier checkStart() {
require(block.timestamp >= starttime, 'BACyCRVPool: not start');
_;
}
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address account) public view returns (uint256) {
return
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
// stake visibility is public as overriding LPTokenWrapper's stake() function
function stake(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACyCRVPool: Cannot stake 0');
uint256 newDeposit = deposits[msg.sender].add(amount);
require(
newDeposit <= 20000e18,
'BACyCRVPool: deposit amount exceeds maximum 20000'
);
deposits[msg.sender] = newDeposit;
super.stake(amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACyCRVPool: Cannot withdraw 0');
deposits[msg.sender] = deposits[msg.sender].sub(amount);
super.withdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) checkStart {
uint256 reward = earned(msg.sender);
if (reward > 0) {
rewards[msg.sender] = 0;
basisCash.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function notifyRewardAmount(uint256 reward)
external
override
onlyRewardDistribution
updateReward(address(0))
{
if (block.timestamp > starttime) {
if (block.timestamp >= periodFinish) {
rewardRate = reward.div(DURATION);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(DURATION);
}
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(reward);
} else {
rewardRate = reward.div(DURATION);
lastUpdateTime = starttime;
periodFinish = starttime.add(DURATION);
emit RewardAdded(reward);
}
}
}
pragma solidity ^0.6.0;
import '../distribution/BACDAIPool.sol';
import '../distribution/BACSUSDPool.sol';
import '../distribution/BACUSDCPool.sol';
import '../distribution/BACUSDTPool.sol';
import '../distribution/BACyCRVPool.sol';
import '../interfaces/IDistributor.sol';
contract InitialCashDistributor is IDistributor {
using SafeMath for uint256;
event Distributed(address pool, uint256 cashAmount);
bool public once = true;
IERC20 public cash;
IRewardDistributionRecipient[] public pools;
uint256 public totalInitialBalance;
constructor(
IERC20 _cash,
IRewardDistributionRecipient[] memory _pools,
uint256 _totalInitialBalance
) public {
require(_pools.length != 0, 'a list of BAC pools are required');
cash = _cash;
pools = _pools;
totalInitialBalance = _totalInitialBalance;
}
function distribute() public override {
require(
once,
'InitialCashDistributor: you cannot run this function twice'
);
for (uint256 i = 0; i < pools.length; i++) {
uint256 amount = totalInitialBalance.div(pools.length);
cash.transfer(address(pools[i]), amount);
pools[i].notifyRewardAmount(amount);
emit Distributed(address(pools[i]), amount);
}
once = false;
}
}
pragma solidity ^0.6.0;
/**
*Submitted for verification at Etherscan.io on 2020-07-17
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: BASISCASHRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
// File: @openzeppelin/contracts/math/Math.sol
import '@openzeppelin/contracts/math/Math.sol';
// File: @openzeppelin/contracts/math/SafeMath.sol
import '@openzeppelin/contracts/math/SafeMath.sol';
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
// File: @openzeppelin/contracts/utils/Address.sol
import '@openzeppelin/contracts/utils/Address.sol';
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
// File: contracts/IRewardDistributionRecipient.sol
import '../interfaces/IRewardDistributionRecipient.sol';
contract DAIWrapper {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IERC20 public dai;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function stake(uint256 amount) public virtual {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
dai.safeTransferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 amount) public virtual {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
dai.safeTransfer(msg.sender, amount);
}
}
contract BACDAIPool is DAIWrapper, IRewardDistributionRecipient {
IERC20 public basisCash;
uint256 public DURATION = 5 days;
uint256 public starttime;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
mapping(address => uint256) public deposits;
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
constructor(
address basisCash_,
address dai_,
uint256 starttime_
) public {
basisCash = IERC20(basisCash_);
dai = IERC20(dai_);
starttime = starttime_;
}
modifier checkStart() {
require(block.timestamp >= starttime, 'BACDAIPool: not start');
_;
}
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address account) public view returns (uint256) {
return
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
// stake visibility is public as overriding LPTokenWrapper's stake() function
function stake(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACDAIPool: Cannot stake 0');
uint256 newDeposit = deposits[msg.sender].add(amount);
require(
newDeposit <= 20000e18,
'BACDAIPool: deposit amount exceeds maximum 20000'
);
deposits[msg.sender] = newDeposit;
super.stake(amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACDAIPool: Cannot withdraw 0');
deposits[msg.sender] = deposits[msg.sender].sub(amount);
super.withdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) checkStart {
uint256 reward = earned(msg.sender);
if (reward > 0) {
rewards[msg.sender] = 0;
basisCash.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function notifyRewardAmount(uint256 reward)
external
override
onlyRewardDistribution
updateReward(address(0))
{
if (block.timestamp > starttime) {
if (block.timestamp >= periodFinish) {
rewardRate = reward.div(DURATION);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(DURATION);
}
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(reward);
} else {
rewardRate = reward.div(DURATION);
lastUpdateTime = starttime;
periodFinish = starttime.add(DURATION);
emit RewardAdded(reward);
}
}
}
pragma solidity ^0.6.0;
/**
*Submitted for verification at Etherscan.io on 2020-07-17
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: BASISCASHRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
// File: @openzeppelin/contracts/math/Math.sol
import '@openzeppelin/contracts/math/Math.sol';
// File: @openzeppelin/contracts/math/SafeMath.sol
import '@openzeppelin/contracts/math/SafeMath.sol';
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
// File: @openzeppelin/contracts/utils/Address.sol
import '@openzeppelin/contracts/utils/Address.sol';
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
// File: contracts/IRewardDistributionRecipient.sol
import '../interfaces/IRewardDistributionRecipient.sol';
contract SUSDWrapper {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IERC20 public SUSD;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function stake(uint256 amount) public virtual {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
SUSD.safeTransferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 amount) public virtual {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
SUSD.safeTransfer(msg.sender, amount);
}
}
contract BACSUSDPool is SUSDWrapper, IRewardDistributionRecipient {
IERC20 public basisCash;
uint256 public DURATION = 5 days;
uint256 public starttime;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
mapping(address => uint256) public deposits;
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
constructor(
address basisCash_,
address susd_,
uint256 starttime_
) public {
basisCash = IERC20(basisCash_);
SUSD = IERC20(susd_);
starttime = starttime_;
}
modifier checkStart() {
require(block.timestamp >= starttime, 'BACSUSDPool: not start');
_;
}
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address account) public view returns (uint256) {
return
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
// stake visibility is public as overriding LPTokenWrapper's stake() function
function stake(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACSUSDPool: Cannot stake 0');
uint256 newDeposit = deposits[msg.sender].add(amount);
require(
newDeposit <= 20000e18,
'BACSUSDPool: deposit amount exceeds maximum 20000'
);
deposits[msg.sender] = newDeposit;
super.stake(amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACSUSDPool: Cannot withdraw 0');
deposits[msg.sender] = deposits[msg.sender].sub(amount);
super.withdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) checkStart {
uint256 reward = earned(msg.sender);
if (reward > 0) {
rewards[msg.sender] = 0;
basisCash.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function notifyRewardAmount(uint256 reward)
external
override
onlyRewardDistribution
updateReward(address(0))
{
if (block.timestamp > starttime) {
if (block.timestamp >= periodFinish) {
rewardRate = reward.div(DURATION);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(DURATION);
}
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(reward);
} else {
rewardRate = reward.div(DURATION);
lastUpdateTime = starttime;
periodFinish = starttime.add(DURATION);
emit RewardAdded(reward);
}
}
}
pragma solidity ^0.6.0;
/**
*Submitted for verification at Etherscan.io on 2020-07-17
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: BASISCASHRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
// File: @openzeppelin/contracts/math/Math.sol
import '@openzeppelin/contracts/math/Math.sol';
// File: @openzeppelin/contracts/math/SafeMath.sol
import '@openzeppelin/contracts/math/SafeMath.sol';
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
// File: @openzeppelin/contracts/utils/Address.sol
import '@openzeppelin/contracts/utils/Address.sol';
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
// File: contracts/IRewardDistributionRecipient.sol
import '../interfaces/IRewardDistributionRecipient.sol';
contract USDCWrapper {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IERC20 public usdc;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function stake(uint256 amount) public virtual {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
usdc.safeTransferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 amount) public virtual {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
usdc.safeTransfer(msg.sender, amount);
}
}
contract BACUSDCPool is USDCWrapper, IRewardDistributionRecipient {
IERC20 public basisCash;
uint256 public DURATION = 5 days;
uint256 public starttime;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
mapping(address => uint256) public deposits;
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
constructor(
address basisCash_,
address usdc_,
uint256 starttime_
) public {
basisCash = IERC20(basisCash_);
usdc = IERC20(usdc_);
starttime = starttime_;
}
modifier checkStart() {
require(block.timestamp >= starttime, 'BACUSDCPool: not start');
_;
}
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address account) public view returns (uint256) {
return
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
// stake visibility is public as overriding LPTokenWrapper's stake() function
function stake(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACUSDCPool: Cannot stake 0');
uint256 newDeposit = deposits[msg.sender].add(amount);
require(
newDeposit <= 20000e6,
'BACUSDCPool: deposit amount exceeds maximum 20000'
);
deposits[msg.sender] = newDeposit;
super.stake(amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACUSDCPool: Cannot withdraw 0');
deposits[msg.sender] = deposits[msg.sender].sub(amount);
super.withdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) checkStart {
uint256 reward = earned(msg.sender);
if (reward > 0) {
rewards[msg.sender] = 0;
basisCash.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function notifyRewardAmount(uint256 reward)
external
override
onlyRewardDistribution
updateReward(address(0))
{
if (block.timestamp > starttime) {
if (block.timestamp >= periodFinish) {
rewardRate = reward.div(DURATION);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(DURATION);
}
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(reward);
} else {
rewardRate = reward.div(DURATION);
lastUpdateTime = starttime;
periodFinish = starttime.add(DURATION);
emit RewardAdded(reward);
}
}
}
pragma solidity ^0.6.0;
/**
*Submitted for verification at Etherscan.io on 2020-07-17
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: BASISCASHRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
// File: @openzeppelin/contracts/math/Math.sol
import '@openzeppelin/contracts/math/Math.sol';
// File: @openzeppelin/contracts/math/SafeMath.sol
import '@openzeppelin/contracts/math/SafeMath.sol';
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
// File: @openzeppelin/contracts/utils/Address.sol
import '@openzeppelin/contracts/utils/Address.sol';
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
// File: contracts/IRewardDistributionRecipient.sol
import '../interfaces/IRewardDistributionRecipient.sol';
contract USDTWrapper {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IERC20 public usdt;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function stake(uint256 amount) public virtual {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
usdt.safeTransferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 amount) public virtual {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
usdt.safeTransfer(msg.sender, amount);
}
}
contract BACUSDTPool is USDTWrapper, IRewardDistributionRecipient {
IERC20 public basisCash;
uint256 public DURATION = 5 days;
uint256 public starttime;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
mapping(address => uint256) public deposits;
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
constructor(
address basisCash_,
address usdt_,
uint256 starttime_
) public {
basisCash = IERC20(basisCash_);
usdt = IERC20(usdt_);
starttime = starttime_;
}
modifier checkStart() {
require(block.timestamp >= starttime, 'BACUSDTPool: not start');
_;
}
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address account) public view returns (uint256) {
return
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
// stake visibility is public as overriding LPTokenWrapper's stake() function
function stake(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACUSDTPool: Cannot stake 0');
uint256 newDeposit = deposits[msg.sender].add(amount);
require(
newDeposit <= 20000e6,
'BACUSDTPool: deposit amount exceeds maximum 20000'
);
deposits[msg.sender] = newDeposit;
super.stake(amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount)
public
override
updateReward(msg.sender)
checkStart
{
require(amount > 0, 'BACUSDTPool: Cannot withdraw 0');
deposits[msg.sender] = deposits[msg.sender].sub(amount);
super.withdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) checkStart {
uint256 reward = earned(msg.sender);
if (reward > 0) {
rewards[msg.sender] = 0;
basisCash.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function notifyRewardAmount(uint256 reward)
external
override
onlyRewardDistribution
updateReward(address(0))
{
if (block.timestamp > starttime) {
if (block.timestamp >= periodFinish) {
rewardRate = reward.div(DURATION);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(DURATION);
}
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(reward);
} else {
rewardRate = reward.div(DURATION);
lastUpdateTime = starttime;
periodFinish = starttime.add(DURATION);
emit RewardAdded(reward);
}
}
}
pragma solidity ^0.6.0;
import './interfaces/IDistributor.sol';
contract Distributor {
IDistributor[] public distributors;
constructor(IDistributor[] memory _distributors) public {
distributors = _distributors;
}
function distribute() public {
for (uint256 i = 0; i < distributors.length; i++) {
distributors[i].distribute();
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "../../GSN/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "../../GSN/Context.sol";
import "./ERC20.sol";
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), decreasedAllowance);
_burn(account, amount);
}
}
pragma solidity ^0.6.0;
import '@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol';
import '../owner/Operator.sol';
contract MockDai is ERC20Burnable, Operator {
/**
* @notice Constructs the Basis Cash ERC-20 contract.
*/
constructor() public ERC20('DAI', 'DAI') {
_mint(msg.sender, 10000 * 10**18);
}
/**
* @notice Operator mints dino cash to a recipient
* @param recipient_ The address of recipient
* @param amount_ The amount of dino cash to mint to
* @return whether the process has been done
*/
function mint(address recipient_, uint256 amount_)
public
onlyOperator
returns (bool)
{
uint256 balanceBefore = balanceOf(recipient_);
_mint(recipient_, amount_);
uint256 balanceAfter = balanceOf(recipient_);
return balanceAfter > balanceBefore;
}
}
pragma solidity ^0.6.0;
import './owner/Operator.sol';
import '@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol';
contract Share is ERC20Burnable, Operator {
constructor() public ERC20('BAS', 'BAS') {
// Mints 1 Basis Share to contract creator for initial Uniswap oracle deployment.
// Will be burned after oracle deployment
_mint(msg.sender, 1 * 10**18);
}
/**
* @notice Operator mints basis cash to a recipient
* @param recipient_ The address of recipient
* @param amount_ The amount of basis cash to mint to
*/
function mint(address recipient_, uint256 amount_)
public
onlyOperator
returns (bool)
{
uint256 balanceBefore = balanceOf(recipient_);
_mint(recipient_, amount_);
uint256 balanceAfter = balanceOf(recipient_);
return balanceAfter >= balanceBefore;
}
function burn(uint256 amount) public override onlyOperator {
super.burn(amount);
}
function burnFrom(address account, uint256 amount)
public
override
onlyOperator
{
super.burnFrom(account, amount);
}
}
pragma solidity ^0.6.0;
import '@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol';
import './owner/Operator.sol';
contract Cash is ERC20Burnable, Operator {
/**
* @notice Constructs the Basis Cash ERC-20 contract.
*/
constructor() public ERC20('BAC', 'BAC') {
// Mints 1 Basis Cash to contract creator for initial Uniswap oracle deployment.
// Will be burned after oracle deployment
_mint(msg.sender, 1 * 10**18);
}
// function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
// super._beforeTokenTransfer(from, to, amount);
// require(
// to != operator(),
// "basis.cash: operator as a recipient is not allowed"
// );
// }
/**
* @notice Operator mints basis cash to a recipient
* @param recipient_ The address of recipient
* @param amount_ The amount of basis cash to mint to
* @return whether the process has been done
*/
function mint(address recipient_, uint256 amount_)
public
onlyOperator
returns (bool)
{
uint256 balanceBefore = balanceOf(recipient_);
_mint(recipient_, amount_);
uint256 balanceAfter = balanceOf(recipient_);
return balanceAfter > balanceBefore;
}
function burn(uint256 amount) public override onlyOperator {
super.burn(amount);
}
function burnFrom(address account, uint256 amount)
public
override
onlyOperator
{
super.burnFrom(account, amount);
}
}
pragma solidity ^0.6.0;
import './owner/Operator.sol';
import '@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol';
contract Bond is ERC20Burnable, Ownable, Operator {
/**
* @notice Constructs the Basis Bond ERC-20 contract.
*/
constructor() public ERC20('BAB', 'BAB') {}
/**
* @notice Operator mints basis bonds to a recipient
* @param recipient_ The address of recipient
* @param amount_ The amount of basis bonds to mint to
* @return whether the process has been done
*/
function mint(address recipient_, uint256 amount_)
public
onlyOperator
returns (bool)
{
uint256 balanceBefore = balanceOf(recipient_);
_mint(recipient_, amount_);
uint256 balanceAfter = balanceOf(recipient_);
return balanceAfter > balanceBefore;
}
function burn(uint256 amount) public override onlyOperator {
super.burn(amount);
}
function burnFrom(address account, uint256 amount)
public
override
onlyOperator
{
super.burnFrom(account, amount);
}
}
pragma solidity ^0.6.0;
interface IUniswapV2Callee {
function uniswapV2Call(
address sender,
uint256 amount0,
uint256 amount1,
bytes calldata data
) external;
}
pragma solidity ^0.6.0;
interface IUniswapV2ERC20 {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.8.0;
contract Migrations {
address public owner;
uint256 public last_completed_migration;
constructor() public {
owner = msg.sender;
}
modifier restricted() {
if (msg.sender == owner) _;
}
function setCompleted(uint256 completed) public restricted {
last_completed_migration = completed;
}
}